SLS/SLH - · PDF filePage 3 Foreword 1 FOREWORD English 1.1 Introduction Itelco-Clima units,...

SLS/SLH

English

Air Cooled Water Chillers and Heat Pumps260,8 kW

727,7 kW

287,5 kW

800,5 kW

IOM 04 SLS/SLH I NCode 035B09045-00Supersedes and Replaces: None“Notified Body No. 1115 ”

oo

Installation & Maintenance Instructions

HSB ISO 9001:2000

Table of contents

English

1 FOREWORD

1.1 Introduction 3

1.2 Warranty 3

1.3 Emergency stop/Normal stop 3

1.4 An introduction to the manual 3

2 SAFETY

2.1 Foreword 4

2.2 Definitions 4

2.3 Access to the unit 5

2.4 General precautions 5

2.5 Precautions against residual risks 5

2.6 Precautions during maintenanceoperations 6

2.7 Safety labels 7

2.8 Safety regulations 9

3 TRANSPORT, LIFTING AND POSITIONING

3.1 Inspection 12

3.2 Lifting 12

3.3 Anchoring 13

3.4 Storage 13

4 INSTALLATION

4.1 Positioning of the unit 14

4.2 Spring Isolator Installation 14

4.3 External hydraulic circuit 15

4.4 Hydraulic connection 16

4.5 Draining the Defrosting Waste Water (for heat pump unit only) 16

4.6 Power supply 17

4.7 Electrical connections 17

4.8 Connecting the plate -typeevaporator’s temperature sensors 19

4.9 Connecting the temperature sensor

of coupled units’ manifold(SLH 3804–4104/SLS 2804-3504) 19

5 START-UP

5.1 Preliminary check 20

5.2 Start-up 20

5.3 Checking the operation 21

5.4 Delivery to the customer 21

6 OPERATION

6.1 General Informations 22

6.2 Keyboard – Display Terminal Unit 22

6.3 Functions / Keys / Configurations 24

7 GENERAL DESCRIPTION

7.1 Introduction 27

7.2 General specifications 27

7.3 Compressors 27

7.4 Refrigerant circuits 27

7.5 Water heat exchanger 28

7.6 Air heat exchanger 28

7.7 Fans 28

7.8 Power supply and control system 29

7.9 “Chiller Control” 30

7.10 Accessories 30

8 TECHNICAL DATA

8.1 Pressure drops 31

8.2 Technical data 33

8.3 Electrical data 49

8.4 Position of shock absorbersweigh distribution on supports 57

8.5 Overall dimensions andmaintenance space 59

8.6 Service spaces 69

Table of contents

Table of contents

9 MAINTENANCE

9.1 General requirements 70

9.2 Planned maintenance 70

9.3 Refrigerant charge 71

9.4 Compressors 71

9.5 Condenser’s coils 71

9.6 Fans 72

9.7 Dehydrating filter 72

9.8 Sight glass 72

9.9 Thermostatic expansion valve 72

9.10 Evaporator 72

10 TROUBLESHOOTING 73

11 SPARE PARTS

11.1 Spare part list 75

11.2 Oil for compressors 75

11.3 Wiring diagrams 75

12 DISMANTLING, DEMOLITIONAND SCRAPPING

12.1 Generalities 76

Foreword

English

1 FOREWORD

1.1 Introduction

Itelco-Clima units, manufactured to state-of-the-art de-sign and implementation standards, ensure top per-formance, reliability and fitness to any type of air-conditioning systems.

These units are designed for cooling water or gly-coled water (and for water heating in heat pumpmodels) and are unfit for any purposes other thanthose specified in this manual.

This manual includes all the information required fora proper installation of the units, as well as the rele-vant operating and maintenance instructions.

It is therefore recommended to read this manualcarefully before installation or any operation on themachine.

The chiller installation and maintenance must be car-ried out by skilled personnel only (where possible,by one of Itelco-Clima’s Authorised Service Centers).

The manufacturer may not be held liable for anydamage to people or property caused by improperinstallation, start-up and/or improper use of the unitand/or failure to implement the procedures and in-structions included in this manual.

1.2 Warranty

These units are delivered complete, tested and readyfor being operated. Any form of warranty will be-come null and void in the event that the appliance ismodified without Itelco-Clima’s preliminary writtenauthorisation.

This warranty shall apply providing that the installa-tion instructions have been complied with (either is-sued by Itelco-Clima, or deriving from the currentpractice), and the Form 1 (“Start-up”) has been filled-in and mailed to Itelco-Clima (attn. After-Sales Ser-vice).

In order for this warranty to be valid, the followingconditions shall be met:h The machine must be operated only by skilled per-

sonnel from Itelco-Clima’s Authorised After-SalesService.

h Maintenance must be performed only by skilledpersonnel - from one of Itelco-Clima’s AuthorisedAfter-Sales Centers.

h Use only original Itelco-Clima spare parts.

h Carry out all the planned maintenance providedfor by this manual in a timely and proper way.

Failure to comply with any of these conditions willautomatically void the warranty.

1.3 Emergency stop / Normal stop

The emergency stop of the unit can be enabled usingthe master switch on the control panel (move downthe lever).

For a normal stop, press the relevant push-buttons.To restart the appliance, follow the procedure de-tailed in this manual.

1.4 An introduction to the manual

For safety reasons, it is imperative to follow the in-structions given in this manual. In case of any dam-age caused by non-compliance with these instruc-tions, the warranty will immediately become null andvoid.

Conventions used throughout the manual:

The Danger sign recalls your attention to acertain procedure or practice which, if notfollowed, may result in serious damage topeople and property.

The Warning sign precedes those proce-dures that, if not followed, may result in seri-ous damage to the appliance.

The Notes contain important observations.

The Useful Tips provide valuable informa-tion that optimises the efficiency of the ap-pliance.

This manual and its contents, as well as the docu-mentation which accompanies the unit, are and re-main the property of Itelco-Clima, which reservesany and all rights thereon. This manual may not becopied, in whole or in part, without Itelco-Clima’swritten authorization.

SUGGESTION

Safety

2 SAFETY

2.1 Foreword

These units must be installed in conformity with theprovisions of Machinery Directive 98/37/EC, LowVoltage Directive 73/23/EC, Pressure Vessels Direc-tive 97/23/EC, Electromagnetic Interference Direc-tive 89/336/EC, as well as with other regulationsapplicable in the country of installation. If these pro-visions are not complied with, the unit must not beoperated.

The unit must be grounded, and no installa-tion and/or maintenance operations maybe carried out before deenergising the elec-trical panel of the unit.

Failure to respect the safety measures mentionedabove may result in electrocution hazard and fire inthe presence of any short-circuits.

Inside the heat exchangers, the compres-sors and the refrigeration lines, this unitcontains liquid and gaseous refrigerant un-der pressure. The release of this refrigerantmay be dangerous and cause injuries.

The units are not designed to be operatedwith natural refrigerants, such as hydrocar-bons. Itelco-Clima may not be held liablefor any problems deriving from the replace-ment of original refrigerant or the introduc-tion of hydrocarbons.

Itelco-Clima units are designed and manufacturedaccording to the requirements of European StandardPED 97/23/EC (pressure vessels).– The used refrigerants are included in group II (non-

hazardous fluids).– The maximum working pressure values are men-

tioned on the unit’s data plate.– Suitable safety devices (pressure switches and safe-

ty valves) have been provided, to prevent anyanomalous overpressure inside the plant.

– The vents of the safety valves are positioned andoriented in such a way as to reduce the risk of con-tact with the operator, in the event that the valve isoperated. Anyway, the installer will convey the dis-charge of the valves far from the unit.

– Dedicated guards (removable panels with tools)and danger signs indicate the presence of hotpipes or components (high surface temperature).

The guards of the fans (only for units pro-vided with air heat exchangers) must be al-ways mounted and must never be removedbefore de-energising the appliance.

It is the User’s responsibility to ensure thatthe unit is fit for the conditions of intendeduse and that both installation and mainte-nance are carried out by experienced per-sonnel, capable of respecting all the recom-mendations provided by this manual. It isimportant that the unit is adequately sup-ported, as detailed in this manual. Non-compliance with these recommendationsmay create hazardous situations for thepersonnel.

The unit must rest on a base which meetsthe characteristics specified in this manual;a base with inadequate characteristics islikely to become a source of serious injuryto the personnel.

The unit has not been design to withstandloads and/or stress that may be transmittedby adjacent units, piping and/or structures.Each external load or stress transmitted tothe unit may break or cause breakdowns inthe unit’s structure, as well as serious dan-gers to people. In these cases, any form ofwarranty will automatically become nulland void.

The packaging material must not be dis-posed of in the surrounding environment orburnt.

2.2 Definitions

OWNER: means the legal representative of the com-pany, body or individual who owns the plant whereItelco-Clima unit has been installed; he/she has theresponsibility of making sure that all the safety regu-lations specified in this manual are complied with,along with the national laws in force.

INSTALLER: means the legal representative of thecompany who has been given by the owner the jobof positioning and performing the hydraulic, electricand other connections of Itelco-Clima unit to theplant: he/she is responsible for handling and prop-erly installing the appliance, as specified in this man-ual and according to the national regulations inforce.

Safety

English

OPERATOR: means a person authorised by the own-er to do on Itelco-Clima unit all the regulation andcontrol operations expressly described in this manu-al, that must be strictly complied with, without ex-ceeding the scope of the tasks entrusted to him.

ENGINEER: means a person authorised directly byItelco-Clima or, in all EC countries, excluding Italy,under his full responsibility, by the distributor of Itel-co-Clima product, to perform any routine and extra-ordinary maintenance operations, as well as anyregulation, control, servicing operations and the re-placement of pieces, as may be necessary during thelife of the unit.

2.3 Access to the unit

The unit must be placed in an area which can be ac-cessed also by OPERATORS and ENGINEERS; oth-erwise the unit must be surrounded by a fence at notless than 2 meters from the external surface of themachine.

OPERATORS and ENGINEERS must enter the fencedarea only after wearing suitable clothing (safetyshoes, gloves, helmet etc.). The INSTALLER personnelor any other visitor must always be accompanied byan OPERATOR.

For no reason shall any unauthorised personnel beleft alone in contact with the unit.

2.4 General precautions

The OPERATOR must simply use the controls of theunit; he must not open any panel, other than the oneproviding access to the control module.

The INSTALLER must simply work on the connectionsbetween plant and machine; he must not open anypanels of the machine and he must not enable anycontrol.

When you approach or work on the unit, follow theprecautions listed below:h do not wear loose clothing or jewellery or any oth-

er accessory tat may be caught in moving partsh wear suitable personal protective equipment

(gloves, goggles etc.) when you have to work inthe presence of free flames (welding operations) orwith compressed air

h if the unit is placed in a closed room, wear ear pro-tection devices

h cut off connecting pipes, drain them in order tobalance the pressure to the atmospheric value be-fore disconnecting them, disassemble connections,filters, joints or other line items

h do not use your hands to check for any pressuredrops

h use tools in a good state of repair; be sure to haveunderstood the instructions before using themh be sure to have removed all tools, electrical cables

and any other objects before closing and startingthe unit again

2.5 Precautions against residual risks

Prevention of residual risks caused by thecontrol systemh be sure to have perfectly understood the operating

instructions before carrying out any operation onthe control panel

h when you have to work on the control panel, keepalways the operating instructions within reach

h start the unit only after you have checked its perfectconnection to the plant

h promptly inform the ENGINEER about any alarminvolving the unit

h do not reset manual restoration alarms unless youhave identified and removed their cause

Prevention of residual mechanical risksh install the unit according to the instructions provid-

ed in this manualh carry out all the periodical maintenance opera-

tions prescribed by this manualh wear a protective helmet before accessing the inte-

rior of the unith before opening any panelling of the machine,

make sure that it is secured to it by hingesh do not touch air condensation coils without wear-

ing protective glovesh do not remove the guards from moving elements

while the unit is runningh check the correct position of the moving elements’

guards before restarting the unit

Prevention of residual electrical risksh connect the unit to the mains according to the in-

structions provided in this manualh periodically carry out all the maintenance opera-

tions specified by this manualh disconnect the unit from the mains by the external

disconnecting switch before opening the electricalboard

h check the proper grounding of the unit before start-up

h check all the electrical connections, the connectingcables, and in particular the insulation; replaceworn or damaged cables

Safety

h periodically check the board’s internal wiringh do not use cables having an inadequate section or

flying connections, even for limited periods of timeor in an emergency

Prevention of other residual risksh make sure that the connections to the unit conform

to the instructions provided in this manual and onthe unit’s panelling

h if you have to disassemble a piece, make sure thatit has been properly mounted again before restart-ing the unit

h do not touch the delivery pipes from the compres-sor, the compressor and any other piping or com-ponent inside the machine before wearing protec-tive gloves

h keep a fire extinguisher fir for electrical appliancesnear the machine

h on the units installed indoor, connect the safetyvalve of the refrigeration circuit to a piping net-work that can channel any overflowing refrigerantoutside

h remove and leak of fluid inside and outside the unith collect the waste liquids and dry any oil spillageh periodically clean the compressor compartment, to

remove any foulingh do not store flammable liquids near the unith do not disperse the refrigerant and the lubricating

oil into the environmenth weld only empty pipes; do not approach flames or

other sources of heat to refrigerant pipesh do not bend/hit pipes containing fluids under pres-

sure

2.6 Precautions during maintenance operations

Maintenance operations can be carried out by au-thorised technicians only.Before performing any maintenance operations:h disconnect the unit from the mains with the external

disconnecting switchh place a warning sign “do not turn on - mainte-

nance in progress” on the external disconnectingswitch

h make sure that on-off remote controls are inhibitedh wear suitable personal protective equipment (hel-

met, safety gloves, goggles and shoes etc.)

To carry out any measurements or checks which re-quire the activation of the machine:h work with the electrical board open only for the

necessary timeh close the electrical board as soon as the measure-

ment or check has been completedh for outdoor units, do not carry out any operations

in the presence of dangerous climatic conditions(rain, snow, mist etc.)

The following precautions must be always adopted:h do not scatter the fluids of the refrigeration circuit

in the surrounding environmenth when replacing an eprom or electronic cards, use

always suitable devices (extractor, antistaticbracelet, etc.)

h to replace a compressor, the evaporator, the con-densing coils or any other weighty element, makesure that the lifting equipment is consistent with theweight to be lifted

h in air units with independent compressor compart-ment, do not access the fan compartment unlessyou have disconnected the machine by the discon-necting switch on the board and you have placeda warning sign “do not turn on - maintenance inprogress”

h contact Itelco-Clima for any modifications to the re-frigeration, hydraulic or wiring diagram of theunit, as well as to its control logics

h contact Itelco-Clima if it is necessary to performvery difficult disassembly and assembly operations

h use only original spare parts purchased directlyfrom Itelco-Clima or the official retailers of the com-panies on the recommended spare parts list

h contact Itelco-Clima if it is necessary to handle theunit one year after its positioning on site or if youwish to dismantle it.

Safety

English

2.7 Safety labels

The labels below will be affixed to each unit in the in-dicated point:

Identification of the refrigerant - External door

Identification of the unit -Outside, on the right-hand front column

R407C

Electrical warningAdjacent to the master switch

Gravity centre - Base

TENE

RE SU

QUE

STA

LINEA

GANC

IO D

I SOL

LEVA

MEN

TO

KEEP

LIFT

HOO

KON

THIS

LINE

Grounding connection - On the electricalboard, adjacent to the connection

Start-up warning - Outside the door ofthe electrical board

Final Test Certificate -Inside the external door

Warning - safetyvalves’ vents

Warning - high-temperature zones

Adjacent to hotpipes or

components

Lifting point - Base

Fitting identification -Adjacent to fittings

ATTENZIONEINSERIRE LE RESISTENZE DI RISCALDAMENTO OLIO ALMENO12 ORE PRIMA DI OGNI AVVIAMENTO (SE PREVISTE).

PRIMA DELLA MESSA IN TENSIONE ASSICURARSI CHE LE VITI DEI CIRCUITIELETTRICI SIANO SERRATE COMPLETAMENTE.

WARNINGENERGIZE THE CRANCKCASE HEATER FOR AT LEAST 12HOURS BEFORE EACH STARTING (IF FITTED).

BEFORE TIGHTENING-UP, TO TIGHTEN ALL TERMINAL SCREWS ESPECIALLYTHOSE IN MAIN CIRCUIT.

8810

0021

5/B

EIN - INLET

ENTRÉE - ENTRATA

AUS - OUTLET

SORTIE - USCITA

Safety

English

Safety

2.8 Safety regulations

Refrigerant data

Toxicity Low

Contact with skin If sprayed, the refrigerant is likely to cause frost burns. If absorbed bythe skin, the danger is very limited; it may cause a slight irritation, andthe liquid is degreasing. Unfreeze the affected skin with water. Removethe contaminated clothes with great care - in the presence of frostburns, the clothes may stick to the skin. Wash with plenty of warm wa-ter the affected skin.In the presence of symptoms such as irritation or blisters, obtain med-ical attention.

Contact with eyes

Ingestion

Inhalation

Recommendations

Prolonged exposure

Vapours do not cause harmful effects. The spraying of refrigerant maycause frost burns. Wash immediately with a proper solution or with tapwater for at least 10 minutes, and then obtain medical attention.

Very unlikely - should something happen, it will cause frost burns.Do not induce vomiting. Only if the patient is conscious, wash outmouth with water and give some 250 ml of water to drink. Then, obtainmedical attention.

R407C, R134a: remarkable concentrations in the air may have ananaesthetic effect, up to fainting. The exposure to considerableamounts may cause irregular heartbeat, up to the sudden death of thepatient. Very high concentrations may result in the risk of asphyxia, dueto the reduction in the oxygen percentage in the atmosphere. Removethe patient to fresh air and keep warm and at rest.If necessary, give oxygen. In case of breathing difficulties or arrest, pro-ceed with artificial respiration. In case of cardiac arrest, proceed withcardiac massage. Then, obtain medical attention.

Semiotics or support therapy is recommended. Cardiac sensitisationhas been observed that, in the presence of circulating catecholaminessuch as adrenalin, may cause cardiac arrhythmia and accordingly, incase of exposure to high concentrations, cardiac arrest.

R407C, R134a: a study on the effects of exposure to 50,000 ppm dur-ing the whole life of rats has identified the development of benign testi-cle tumour. This situation should therefore be negligible for personnelexposed to concentrations equal to or lower than professional levels.

Professional levels

Stability R407C, R134a: Not specified

R407C, R134a: Recommended threshold: 1000 ppm v/v - 8 hoursTWA.

Conditions to avoid Do not use in the presence of flames, burning surfaces and excess hu-midity.

Safety data: R407C, R134a

Hazardous reactions May react with sodium, potassium, barium and other alkaline metals.Incompatible substances: magnesium and alloys with magnesium con-centrations > 2%.

Hazardous decomposition products

R407C, R134a: Halogen acids produced by thermal decompositionand hydrolysis.

Respiratory system protection

Storage

Protective clothing

Accidental release measures

Disposal

Fire fighting information

Cylinders

Protective fire fighting equipment

If you are in doubt about the concentration in the atmosphere, it is rec-ommended to wear a respirator approved by an accident-preventionAuthority, of the independent or oxygen type.

Cylinders must be stored in a dry and fresh place, free from any firehazard, far from direct sunlight or other sources of heat, radiators etc.Keep a temperature below 45°C.

Wear overalls, protective gloves and goggles or a mask.

It is important to wear protective clothing and a respirator. Stop thesource of the leak, if you can do this without danger. Negligible leakscan be left evaporating under the sun, providing that the room is wellventilated. Considerable leaks: ventilate the room. Reduce the leak withsand, earth or other absorbing substances. Make sure that the liquiddoes is not channelled into gutters, sewers or pits where the vapoursare likely to create a stuffy atmosphere.

The best method is recovery and recycling. If this method is not practi-cable, dispose according to an approved procedure, that shall ensurethe absorption and neutralization of acids and toxic agents.

R407C, R134a: Not flammable in the atmosphere.

In case of fire, wear an independent respirator and protective clothing.

The cylinders, if exposed to fire, shall be cooled by water jets; other-wise, if heated, they may explode.

General precautions Do not inhale concentrated vapours. Their concentration in the atmos-phere should not exceed the minimum preset values and should bemaintained below the professional threshold. Being more weighty thanthe air, the vapour concentrates on the bottom, in narrow areas. There-fore, the exhaust system must work at low level.

Safety

English

Safety

Refrigerant oil data Safety data: Polyolester oil (POE)

Classification

Contact with skin

Contact with eyes

Ingestion

Inhalation

Conditions to avoid

Protection of the respiratory system

Protective clothing

Accidental release measures

Disposal

Fire fighting information

Cylinders

Fire fighting protective equipment

Not harmful

May cause slight irritation. Does not require first aid measures. It is rec-ommended to follow usual personal hygiene measures, including wash-ing the exposed skin with soap and water several times a day. It is alsorecommended to wash your overalls at least once a week.

Wash thoroughly with a suitable solution or tap water.

Seek medical advice immediately.

Seek medical advice immediately.

Strong oxidising substances, caustic or acid solutions, excess heat.May corrode some types of paint or rubber.

Use in well ventilated rooms.

Always wear protective goggles or a mask. Wearing protective glovesis not mandatory, but is recommended in case of prolonged exposureto refrigerant oil.

It is important to wear protective clothing and, especially, goggles.Stop the source of the leak. Reduce the leak with absorbing substances(sand, sawdust or any other absorbing material available on the mar-ket).

The refrigerant oil and its waste will be disposed of in an approved in-cinerator, in conformity with the provisions and the local regulationsapplicable to oil waste.

In the presence of hot liquid or flames, use dry powder, carbon dioxideor foam. If the leak is not burning, use a water jet to remove anyvapours and to protect the personnel responsible for stopping the leak.

The cylinders exposed to a fire will be cooled with water jets in case offire.

In case of fire, wear an independent respirator.

Transport, Lifting and Positioning

3 TRANSPORT, LIFTING AND POSITIONING

Refrigerators are supplied assembled (apart fromstandard antivibrating rubber supports, that will beinstalled on site). The equipment are full of refriger-ant and oil, in the quantity required for a proper op-eration.

3.1 Inspection

When the unit is delivered, it is recommended tocheck it carefully and to identify any damage oc-curred during transportation. The goods are shippedex-factory, at the buyer’s risk. Check that the deliveryincludes all the components listed in the order.

In case of damage, note it down on the carrier’s de-livery note and issue a claim according to the instruc-tions provided in the delivery note.

In the presence of any serious damage, that does notaffect the surface only, it is recommended to informItelco-Clima immediately.

Please note that Itelco-Clima may not be held liablefor any damage to the equipment during transporta-tion, even though the carrier has been appointed bythe factory.

3.2 Lifting

The unit must be lifted by using the hooks inserted in-to the relevant eyebolts (see the figure).

It is recommended to use a spacer to prevent cablesfrom damaging the unit (see the figure).

LL = Depth

Before positioning the unit, make sure that the placeof installation is appropriate and sturdy enough tohold the weight and to withstand the stress causedby the operation of the whole assembly.

Do not displace the unit on rollers, and donot lift it with a lift truck.

To lift and displace the unit:

h Insert and secure eyebolts into the holes markedon the frame.

h Insert spacer between cables.

h Hook near the barycentre of the unit.

h The cables must be long enough to form, if ten-sioned, an angle of at least 45° with respect to thehorizontal plane.

English

Transport, Lifting and Positioning

For lifting operations, use only tools andmaterial fit for this purpose, in accordancewith accident-prevention regulations.

During the lifting and handling of the unit,be careful not to damage the finned pack ofthe coils positioned on the sides of the unit.The sides of the unit must be protected bycardboard or plywood sheets.

It is recommended not to remove the protec-tive plastic envelope, that should preventscraps from penetrating into the applianceand any damage to the surfaces, until theunit is ready for operation.

The lifting eyebolts protrude from the baseof the unit; it is therefore recommended toremove them once the unit has been liftedand positioned, if in your opinion they arelikely to become a source of hazard and in-jury.

The eyebolts must be mounted on the unit wheneverit shall be displaced and then lifted again.

3.3 Anchoring

It is not essential to secure the unit to the foundations,unless in areas where there is a serious risk of earth-quake, or if the appliance is installed on the top of asteel frame.

3.4 Storage

When the unit is to be stored before installation,adopt a few precautions to prevent any damage orrisk of corrosion or wear:h plug or seal every single opening, such as water

fittingsh do not store the appliance in a room where the

temperature exceeds 50°C for the units usingR407C and, if possible, do not expose to directsunlight

h it is recommended to store the unit in a roof wheretraffic is minimized, to prevent the risk of acciden-tal damage

h the unit must not be washed with a steam jeth take away and leave to the site manager all the

keys providing access to the control board

Finally, it is recommended to carry out visual inspec-tions at regular intervals.

Installation

4 INSTALLATION

4.1 Positioning of the unit

Before installing the unit, make sure that thestructure of the building and/or the support-ing surface can withstand the weight of theappliance. The weights of the units are list-ed in Chapter 8 of this manual.

These units have been designed for outdoor installa-tion on a solid surface. Standard accessories includeantivibrating rubber supports, that must be posi-tioned under the base.

When the unit is to be installed on the ground, it isnecessary to provide a concrete base, to ensure auniform distribution of the weights.

As a general rule, no special sub-bases are required.However, if the unit is to be installed on the top of in-habited rooms, it is advisable to rest it on springshock absorbers (optional), that will minimise thetransmission of any vibration to the structures.

The spring shock absorbers are fastened tosuitable brackets (see the installation notes,paragraph 4.2), protruding from the baseof the unit.The use of shock absorbers provided by thecustomer requires the adoption of suitablefastening brackets (that are an optional).

To choose the place of installation of the unit, bear inmind that:h the longitudinal axis of the unit must be parallel to

the direction of prevailing winds, so as to ensure auniform distribution of the air on finned exchang-ers

h the unit must not be installed near boilers’ ventpipes

h the unit must not be installed leeward with respectto sources of air contaminated by greases, suchas, for example, the outlets to kitchen exhausthoods into the atmosphere. Otherwise, the greaseis likely to deposit on the fins of the refrigerant /airexchangers, and would fix every type of atmos-pheric impurity, resulting in the quick clogging ofthe exchangers

h the unit must not be installed in areas subject toconsiderable snow falling

h the unit must not be installed in areas subject toflooding, under gutters etc.

h the unit must not be installed in air shafts, narrowcourts or other small places, where the noise maybe reflected by the walls or the air ejected by fansmay short-circuit itself on refrigerant/air heat ex-changers or condenser

h the place of installation must be have all the neces-sary spaces for air circulation and maintenanceoperations (see Chapter 9).

4.2 Spring Isolator Installation

h Prepare the base, that must be flat and plane.h Lift the appliance and insert shock absorbers as

follows:

C

FEDC

B

A

base of the machine

To be fitted underthe bracket

bracket kit

1) proceed with the assembly of the jack components(B-C-D-E-)

– insert the rod of the jack (B) into the threaded holeon the upper plate of the antivibrating device (A)

– insert the support, complete with jack, into the holeprepared on the bracket

– position the bracket and the relevant jack on thebase of the machine to be insulated, using theholes drilled for fastening.

English

2) secured the bracket on the base with the screwsforming part of the kit.

Installation

h A circulation pump that can ensure the necessarycapacity and discharge head.

h The capacity of the primary hydraulic circuitshould not be less than 7.5 litres/KW of coolingcapacity, in order to prevent the repeated start-upof the compressor and any damage to it. If the wa-ter capacity in the primary piping of the circuitand in the evaporator is lower than this value, aninsulated storage tank shall be installed.

h A membrane expansion vessel provided with safe-ty valve with vent, that must be visible.

The capacity of the expansion vessel mustallow for an expansion of at least 2% of thevolume of the fluid in the circuit (evapora-tor, piping, user circuit and standby tank, ifany). The expansion vessel needs not beisolated, because no water can circulate in-side it.

h A flow meter, to disable the appliance when thewater is not circulating.

The flow meter must be connected (termi-nals 1-2) as shown in the wiring diagram ofthe “User’s Terminal Box” (Paragraph 4.7).

To install the flow meter, follow the manufacturer’sinstructions.

As a general rule, the flow meter shall be mountedon a horizontal pipe, at a distance from the curvesequal to 10 times the diameter of the pipe and farfrom valves or other components that are likely tohinder the water flow upstream of or downstreamfrom the flow meter.

h The bleed valves must be mounted on the highestpoint of the piping.

h The stop valves must be mounted on the piping ofthe water entering/leaving the condenser.

h The discharge points (provided with plugs, cocksetc.) must be arranged in the lowest point of thepiping.

3) make sure that the bracket is secured andclamped to the base of the machine, and that it isresting on the flat washer (E) of the jack

– To offset any difference in height, work on high nut(D), using the relevant wrench

– Clamp in the obtain position with the grower wash-er (F) and the relevant low nut (C)

At the end of this operation, check that the machineis elastic on its axes, and preset for the installation ofantivibrating joints in the water connections.

4.3 External hydraulic circuit

The external hydraulic circuit must ensurethe water flow to the evaporator under anyworking or adjustment conditions.

The external hydraulic circuit should consist of the fol-lowing elements:

Installation

Then:h Provide the evaporator with a by-pass circuit

equipped with a valve to wash the plant.h Insulate the piping, to prevent the risk of heat loss.h Position a filter on the suction side of the evapora-

tor of the heat recovery condenser.

Before filling the circuit, it is important tocheck that it is free from any foreign matter,sand, gravels, rust, welding deposits, wasteand other materials that may damage theevaporator.

When cleaning the lines, it is recommended to cre-ate a circuit by-pass. It is important to mount a filter-ing medium (30 mesh) upstream of the chiller.

If necessary, the water required to fill thecircuit must be treated to obtain the request-ed PH.

Legends:

I: Pressure gauge connectionS: Gate valveFl: Flow Switch

GA: Flexible hosesR: Drain cockT: ThermometerF: Filter

4.4 Hydraulic connection

The water inlet/outlet fittings shall conform to the in-structions provided by the plates affixed near theconnection points.

4.5 Draining the defrosting waste water (for heat pump unit only)

When heat pump units work in heating mode, dur-ing defrosting cycles, they may discharge water fromthe base. This is why the units should be installed atleast 200 mm above the floor level, so as to allowthe free drainage of waste water, without the risk ofproducing ice banks.

The heat pump units must be installed in positionswhere the defrosting water cannot create any dam-age.

English

Installation

4.6 Power supply

Before carrying out any operations on theelectrical system, make sure that the unit isdeenergised.

It is important that the appliance is ground-ed.

The company in charge of the installationshall conform to the standards applicable tooutdoor electrical connections.

Itelco-Clima may not be held liable for any damageand/or injury caused by failure to comply with theseprecautions.

The unit conforms to EN 60204-1.

The following connections shall be provided:h A 3-phase and grounding connection for the pow-

er supply circuit.h The electrical distribution system shall meet the

power absorbed by the appliance.h The disconnecting and magnetothermal switches

must be sized to control the starting current of theunit.

h The power supply lines and the insulation devicesmust be designed in such a way that every line in-dependent.

h It is recommended to install differential switches,to prevent any damage caused by phase drops.

h The fans and compressors are supplied throughcontactors controlled from the control panel.

h Each motor is provided with an internal safetythermal device and external fuses.

h The power supply cables must be inserted intodedicated openings on the front of the unit, andthe will enter the electrical board through holesdrilled on the bottom of the board.

4.7 Electrical connections

The unit must be installed on site according to theMachinery Directive (98/37/EC), the Low Voltage Di-rective (73/23/EC), the Electromagnetic InterferenceDirective (89/336/EC) and the usual procedures andstandards applicable in the place of installation. Theunit must not be operated if its installation has notbeen carried out according to the instructions provid-ed in this manual.

The power supply lines must consist of insulated cop-per conductors, dimensioned for the maximum ab-sorbed current.

Connection to terminals must be performed accord-ing to the diagram of connections (User’s TerminalBox) provided in this manual and according to thewiring diagram which accompanies the unit.

Before connecting the power supply lines,check that the available voltage value doesnot exceed the range specified in the Elec-tric Data (Chapter 8).

For 3-phase systems, check also that the unbalancebetween the phases does not exceed 2%. To performthis check, measure the differences between the volt-age of each phase couple and their mean value dur-ing operation. The maximum % value of these differ-ences (unbalance) must not exceed 2% of the meanvoltage.

If the unbalance is unacceptable, contact the EnergyDistributor to solve this problem.

Supplying the unit through a line whose un-balance exceeds the permissible value willautomatically void the warranty.

The SLS 3804 - 4104 and SLH 2804 - 3204 - 3504twin units are provided with two switchboards posi-tioned at the ends of the units. A switchboard is iden-tified as “Master” and includes the control panel(keyboard - display), the other as auxiliary “Slave”.Each switchboard must be connected to the relativepower supply line. A single point for power supplycan be provided using a shunt board (supplied as anaccessory).

Installation

0101 010101 01

0202 6

0303 03

0505 05

0606 6

0707 07

0606 6

11 11

22 12

33 13

44 6

111111 111

112112 6

113113 113

121121 121

122122 122

123123 123

151151 151

152152 152

153153 153

QG - Y1PACK

REMOTE START/STOP SWITCH

REMOTE SUMMER/WINTER SWITCH

(SRS)

(COMMON)

(SRHP)

DOUBLE SET-POINT (DAY/NIGHT) (SDN)

PHASE VOLTAGE CONTROL (SQZ)

FLOW SWITCH (SF)

EXTERNAL INTRLOK (OPTIONAL) CIRC PUMP ETC

(COMMON)

LOAD SHEDDING REMOTE CONTROL C.1 (1-SLS)

LOAD SHEDDING REMOTE CONTROL C.2 (1-SLS)

(COMMON)GENERAL ALARM SYSTEM 1-2(NO)

(NC)

(COMMON)

(COOL)REMOTE INDICATION SUMMER/WINTER(ONLY HEAT PUMP)

(HEAT)

33 13

44 6

88 4

103103 103

141141 141

142142 142

QP - Y1

REMOTE INDICATION PUMP 1 ON

88 4COMMON

1414ANTIFREEZE RELAY (MAX 0.5 AMP 230VAC) 14

101101 101

102102 102REMOTE INDICATION VOLTAGE ON

103103 103PUMP RELAY (MAX 0,5 AMP 230VAC)

131131 131

132132 132REMOTE INDICATION COMPRESSOR 1 ON

133133 133

134134 134REMOTE INDICATION COMPRESSOR 2 ON

211211 B8

212212 GND

213213 +VDC(GND)

(B8)PLANT WATER TEMPERATURE PROBE

(+VDC)

143143 143

144144 144REMOTE INDICATION PUMP 2 ON

145145 145

146146 146REMOTE INDICATION ALARM PUMP 1

147147 147

148148 148REMOTE INDICATION ALARM PUMP 2

USER TERMINALS

Terminal box

Installation

English

4.8 Connecting the plate-type evaporator’s temperature sensors

The SLH and SLS units with plate-type heat exchang-ers are provided with fittings for hydraulic connec-tions between the heat exchangers and the plants,complete with sensor well to fasten the temperaturesensors for the water entering and leaving the plant;they are supplied separate and must be mountedduring the installation of the unit, as explained in theinstructions below.

4.9 Connecting the temperature sensorof coupled units’ manifold(SLH 3804-4104/SLS 2804-3504)

For the SLS 3804 - 4104 and SLH 2804 - 3204-3504 units, the two heat exchangers (of plate orshell and tube type) must be connected in parallelthrough a manifold (to be provided by the customer).The supplied temperature control sensor for the wa-

ter returning from the plant is not installed on theunit.The sensor, through the relevant well, must be posi-tioned on the manifold which connects the two heatexchangers, as explained in the instructions below.

Position Sensor from manifold Twin units

“Master”switchboard “Slave”

switchboard

IN INOUT OUT

Evaporator 1 Evaporator 2

Manifold

Sensor wellBT-NET

To the external hydraulic system

1/2” Gas wellManual exhaust valve

3’ manifold fitting

3” Victaulic Flex joint

3” Victaulic Flex joint

3’ manifold fitting1/2” Gas well

BT-IN

IN

BT-OUT

OUT

Start-up

5 START-UP

The unit must be started for the first time bypersonnel suitably trained by one of Itelco-Clima’s Authorised Service Centre. Failureto meet this requirement will immediatelyvoid the warranty.

The operations carried out by Itelco-Climapersonnel are limited to the start-up of theunit, and do not include any other opera-tion on the plant, such as, for example,electrical and hydraulic connections etc. Allthe other operations before start-up, includ-ing oil pre-heating for at least 12 hours,must be performed by the Installer.

5.1 Preliminary check

The checks listed below shall be performed beforestarting the unit and before the arrival of the person-nel authorised by Itelco-Clima.

h Check the section of power supply and groundingcables; make sure that terminals are tightened andcheck the correct operation of contactors, with themaster switch open.

h Check that any voltage and phase variation in thepower supply does not exceed the prefixed thresh-olds.

h Connect the contacts of the flow meter and thethermal relay of the pump and of the other devices(if any), to terminals 1-2 and 3-4, respectively.

h Check that the components of the external watercircuit (pump, user equipment, filters, power sup-ply tank and reservoir, if any) have been installedproperly, and according to the manufacturer’s in-structions.

h Check the filling of the hydraulic circuits, andmake sure that the fluid circulation is correct, with-out any trace of leaks and air bubbles. If you useethylene glycol as antifreeze, check that its per-centage is correct.

h Check that the direction of rotation of the pumps iscorrect, and that fluids have been circulating for atleast 12 hours for both pumps. Then, clean the fil-ters on the suction side of the pumps.

h Adjust the liquid distribution network in such away that the flow rate is within the specifiedrange.

h Check that the water quality is up to the specifica-tions.

h Check position of temperature sensor to defrost(only heat pump).

h Check that oil heaters, if any, have been turned onat least 12 hours before.

5.2 Start-up

Start-up sequence:

h Turn on the master switch (at least 12 hours be-fore).

h Check that the oil in the compressor has reachedthe requested temperature (the minimum tempera-ture outside the pan must be approx. 40°C) andthat the auxiliary control circuit is energised.

h Check the operation of all the external equipment,and make sure that the control devices of the plantare properly calibrated.

h Start the pump and check that the water flow iscorrect.

h Set the desired fluid temperature on the controlboard.

h Start the appliance (see Chapter 6).

h After about 15 minutes of operation check thatthere are no bubbles, through the sight glass onthe liquid line.

The presence of bubbles may indicate thata part of the refrigerant charge has been re-leased in one or more points. It is importantto remove these leaks before proceeding.

h Repeat the start-up procedure after removing theleaks.

h Check the oil level in the compressor’s sight glass.

English

Start-up

5.3 Checking the operation

Check the following:

h The temperature of the water entering the evapo-rator.

h The temperature of the water leaving the evapora-tor.

h The level of the water flow rate in the evaporator,if possible.

h The current absorption upon the start of the com-pressor and in case of stabilised operation.

h The fan’s current absorption.

Check that the condensing and evaporation temper-atures, during operation at high and low pressuredetected by the pressure gauges of the refrigerant,are within the following range:(On the units not provided with HP/LP pressuregauges for the refrigerant, connect a pressure gaugeto the Schreader valves on the refrigeration circuit).

5.4 Delivery to the customer

h Train the user according to the instructions provid-ed in Section 6.

HP side Approx. 15 to 21°C above thetemperature of the air entering thecondenser, for R407C units.

LP side Approx. 2 to 7°C below the tem-perature of the leaving chilled wa-ter, for R407C units.

6 OPERATION

The units SLS/SLH are equipped with a microproces-sor control logic and regulation management sys-tem.

The system consists of a unit logic board and a liquidcrystal control panel which manages the control,starting, shutdown and display functions.

6.1 General Informations

h Introduction

The information and the operating instructions of theelectronic control system mounted on the unit are list-ed here below.

h Main characteristics

– Microprocessor control– User friendly easy reachable keyboard– Proportional – Integral control of return water tem-

perature (RWT)– Hysteresis type control of leaving chilled water tem-

perature (LWT)– Access code to Service Level– Acoustic and LED alarm indication– Backlighted liquid crystals display– Closed loop condensing pressure control– Start and stop pump down logic– Cooling capacity steps rotation-–Oil recovery function– Night (or Double set point) function management– Compressor and pump working hours meter– Discharge and suction pressure display– Memorized alarms history– 4 set point time programs

Possibility to connect:– Serial Communication Card RS485: to connect the

Chiller Control to a BMS (Carel or Modbus type)– Remote Display Terminal– Remote control– Phase monitoring kit– Black Box

h “Chiller Control” system for SLS/Htwo screw compressors units

These cooling only water chillers are provided witha microprocessor board having a default programfor the management of two refrigeration circuitseach one equipped with one twin screws compres-sor, one low pressure transducer and one high pres-sure transducer. The control system consists of:- INTERNAL ELECTRONIC PCB- TERMINAL UNIT WITH DISPLAY AND KEYBOARD- CHILLED FLUID TEMPERATURE SENSORS- AMBIENT AIR TEMPERATURE SENSORS- COIL TEMPERATURE SENSORS- HIGH PRESSURE TRANSDUCER- LOW PRESSURE TRANSDUCER

6.2 Keyboard – Display Terminal Unit

h General Information

The figure which follows shows the terminal unit withopen access door.On the figure it is possible to see the microprocessormanaged 4 lines – 20 columns LCD display, the key-board and the LEDs which allow to program all thecontrol parameters as setpoints, differential band,alarm thresholds and to perform the main functions.

Operation

h Keyboard

The terminal unit allows the operator to perform thefollowing operations:– initial configuration of the unit– modification of the main working parameters– displaying of the alarms and their notification by

“buzzer”– displaying of all the measured parameters.

English

Operation

The connection between the terminal unit and theboard is realized by a 6 ways phone cable.The connection between the terminal unit and themain board is not strictly necessary to the normal op-eration of the controller.

Access to the displaying mask of themain parameters and unit status mask.

Access to devices maintenance parame-ters (elapsed working hour of the deviceand reset of the hours meter, alarm histo-ry) (Service Level)

Not Available

Access to the displaying masks of digi-tal and Analog inputs and outputs statusand of the software release.

Access to clock programming mask

Access to the displaying / programmingmasks of the control setpoint (User Level– Setpoint)

Access to “Service level” masks

Pushing this key together it ispossible to access to the“Manufacturer Level”

Used only for unit with four compressorsor back to back configuration with Mas-ter Slave. Switch the displaying Masterunit control / Slave unit control.

The LEDs of each keys light up when the function re-lated to the key is active.

menu I/O set prog

info? on-off alarm enter

menu

I/O

set

prog

info?

menu prog+

1on-off

2alarm

3/4 5enter

Figure 1

1. On/Off key: it allows to switch on and off the unit.Unit status is indicated by the lighting of thegreen LED.

2. Alarm key: it is used to display the alarms, to man-ually reset the alarms and to arrest the buzzer. Ifthe key is lighted in red it means that at least onealarm was detected.Pushing one time this key the buzzer is arrestedand the mask related the active alarm is dis-played.Pushing it a second time the alarm is reset.

3. Upward arrow key: it allows to program the con-trol parameters and to move between the masks(not backlighted).

4. Downward arrow key: it allows to program thecontrol parameters and to move between themasks (not backlighted).

5. Enter key: it allows to move the cursor inside themasks and to save the programmed parameters.This key is continuously backlighted (in yellow) toshow that the unit is under power.

h Display

The unit is equipped with a 4 lines – 20 columns LCDdisplay.The parameters and the operation information areshown in pages called “masks”The navigation inside each mask is possible usingas follows the terminal unit keys.

When cursor position corresponds to the left cornerof the upper part of the display (Home) pushing the

arrow keys it is possible to access to themasks which are associated to the selected field. If amask contains parameters programming fields, push-ing the key ENTER the cursor will move to thosefields. When it reaches one of the programmingfields, using the arrow keys it is possible tomodify the relevant value within its programmingrange. The modified value must be confirmed push-ing the ENTER key.

x Riga0Home Riga1

Riga2 Riga3

+ - - - - - - - - - - - - - - - - - - - - +

+ - - - - - - - - - - - - - - - - - - - - +Line 0Line 1Line 2Line 3

4

4

Operation

Code Alarm Description Comp 1 Comp 2 Fan #1 Fan #2 Pump NotesStatus Status Status Status Status

AL01 Wrong power Off Off Off Off Off Phase monitor (1)AL02 Antifreeze alarm Off Off Off Off OnAL03 Interlock Off Off Off Off OffAL04 Flow switch alarm Off Off Off Off OffAL05 System #1 low suction pressure Off On Off On OnAL06 System #2 low suction pressure On Off On Off OnAL07 System #1 high discharge pressure Off On Off On OnAL08 System #2 high discharge pressure On Off On Off OnAL09 Compressor #1 thermal protection Off On Off On OnAL10 Compressor #2 thermal protection On Off On Off OnAL11 Recovery antifreeze alarm On On On On OnAL12 System #1 group #1 fan thermal protection On On Off gr. # 1 On OnAL13 System #1 group #2 fan thermal protection On On Off gr. # 2 On OnAL14 System #2 group #1 fan thermal protection On On On Off gr. # 1 OnAL15 System #2 group #2 fan thermal protection On On On Off gr. # 2 OnAL16 System #1 compressor differential pressure Off On Off On OnAL17 System #2 compressor differential pressure On Off On Off OnAL18 Clock board failure On On On On OnAL21 B1-Tin sensor failure Off Off Off Off OnAL22 B2-LP1 sensor failure Off On Off On OnAL23 B3-DP1 sensor failure Off On On On OnAL24 B4-Tair sensor failure On On On On OnAL25 B5-Tout sensor failure Off Off Off Off OnAL26 B6-LP2 sensor failure On Off On Off OnAL27 B7-DP2 sensor failure On Off On On OnAL28 B8-Tplan sensor failure Off Off Off Off OnAL29 B9-Trin/TC1 sensor failure On On On On On note (2)AL30 B10-Trout/TC2 sensor failure On On On On On note (2)AL31 System #1 compressor maintenance On On On On OnAL32 System #2 compressor maintenance On On On On OnAL33 Pump maintenance On On On On On- - - - - Faulted Eprom Off Off Off Off Off

Note:1 = Check power phases rotation and/or minimum voltage. It works only in case the Phases Monitor (accessory) is installed.2 = It forces to leave the recovery mode. Recovery mode inhibited.

6.3 Functions / Keys / Configurations

h Alarm Table

h “Menu” key

Pushing the “Menu” key the main mask is displayed:

U:1 RWT ................... 0.0 °CSYS#1: OFFSYS#2: OFFUnit.. ON

In this mask the following items are displayed:– unit serial number and control temperature– system #1 status– system #2 status– unit status

English

Operation

h I/O (input / output) Status

Pushing the “I/O” key it is possible to access to allthe masks showing the values read by all the sensorsinstalled on the unit.

Sensor UseTin Entering chilled fluid temperatureTout Leaving chilled fluid temperatureTpLAN Installation control sensor

(in case of “Chiller Network”) Control sensor unit 4 compressors

SP #1 System #1 suction pressure transducerDP #1 System #1 discharge pressure transducerSP #2 System #2 suction pressure transducerDP #2 System #2 discharge pressure transducerTair Ambient air temperatureTC #1 Coil 1 temperature (only SLH)TC #2 Coil 2 temperature (only SLH)TRin Heat recovery heat exchanger entering water temp.TRout Heat recovery heat exchanger leaving water temp.

The following items are also displayed:1. Chiller Control digital inputs and outputs status2. Analog outputs driving the fan speed controllers3. Code and release of the “Chiller Control” soft-

ware.

h Maintenance

Pushing the “Maintenance” key it is possible to ac-cess to the following information masks:

1. ALARM HISTORY

Pushing the “Enter” the cursor enter in the list of thememorized alarms. At this point the arrow keys al-low to scroll the masks of all the memorized alarmswhich show the date, time, code and the controlledwater temperature (entering or leaving) at the mo-ment in which the alarm itself was detected.

2. PUMP WORKING HOURS

3. COMPRESSORS WORKING HOURS

4. PASSWORD (*)

Note (*): Contact Itelco Clima Service Department toaccess to the following masks.

RST_HOUR METERS

MSK_FILTERS

M_DISABLE

M_OFFSET1

M_OFFSET2

M_OFFSET3

N°0000AL000 00:00 00/00/00Setpoint ......................00.0 °CTemperature .............. 00.0 °C

U:1Pump...................... 00000 h

U:1 SYS #1Compressor 00000 hU:1 SYS #2Compressor 00000 h

U:1Digit password

0000

Reset hours U:1pymp ....................... NcompressorsSYS #1 N SYS #2 N

Enabling softwarefilters ........................ SThreshold ................... 00.5 °CInterval ................... 020 sec

EnablingcompressorsSYS #1=Y SYS #2=Y

Sensors calibrationTin ............................. 0.0 °C SP #1 ........................ 0.0 barDP #1 ........................ 0.0 bar

Tair ............................. 0.0 °CTout ............................ 0.0 °CSP #2 ........................ 0.0 barDP #2 ........................ 0.0 bar

Sensors calibrationTpLAN ......................... 0.0 °CTRin .......................... 0.0 °CTRout .......................... 0.0 °C

Operation

HOUR_THRES

h Setpoint

Pushing the “Set” key it is possible to access to user’sSetpoint level. The following table contains the de-tails of the parameters which is possible to set withthe relevant limitations and default values:

Maintenance alarmthreshod

003X1000h

User’s Setpoints Control of Low Limit High Limit Default

System #1 ON/OFF – OFF ON OFFSystem #2 ON/OFF – OFF ON OFFCooling Setpoint Inlet 8 20 10

Outlet 6 20 8Heating Setpoint Inlet 20 48 43

Outlet 20 50 45Glycol setpoint Inlet –15 20 10

Outlet –15 20 8Dead band Inlet 1 10 5

Outlet 1 6 2Language Selection — ITA ENG GER FRA SPA ITARecoverySystem #2 ON/OFF — OFF ON OFFSystem #1 ON/OFF — OFF ON OFFRecoverySetpoint Recovery 30 50 45Band Recovery 2 6 4

h Clock Key

To have access to the following mask:

DATE, DAY AND TIME

TIMING PERIODS ENABLING

U:1 ClockHour 00:00DayDate 00/00/00

Day timingperiods withsetpointvariations ...........................N

SETPOINTS TIMING

NIGHT SETBACK MODE (*)

(*) Only if this mode is enabled in Service Level.

Setp1 = 00.0 - 00:00hSetp2 = 00.0 - 00:00hSetp3 = 00.0 - 00:00hSetp4 = 00.0 - 23:59h

Night Mode

PM 22:00 AM 06:00

English

General Description

7.2 General specifications

The SLS/H units are supplied complete and providedwith all connecting pipes for the refrigerant and in-ternal wiring.

The refrigeration circuit of each unit undergoes apressure test, is drained, vacuumised, dehydratedand filled with refrigerant, and includes the neces-sary oil. Once assembled, each unit is subjected to acomplete final testing and the correct operation of allrefrigeration circuits is checked.

The base and the frame of each unit are made ofvery thick galvanised sheet, and are secured bystainless steel screws and bolts. All panels can bedisassembled for easy access to internal compo-nents. All galvanised steel parts are painted withwhite polyester resin (RAL 9001).

7.3 Compressors

The SLS/H units are provided with high power, highefficiency and low vibration level semi-hermeticscrew compressors (oil injection or external coolingwith plate-type exchangers) to reduce the compres-sor’s discharge temperature, and to work at higherroom temperatures (Chiller), or to produce hot wateralso at low room temperatures (Heat Pump). The ca-pacity control, of the step type, is handled by capaci-ty control solenoid valves, handled by the micro-processor of the appliance.

7 GENERAL DESCRIPTION

7.1 Introduction

The SLS/SLH units are water chillers/air-water heatpumps with screw compressors provided with two orfour refrigeration circuits.

These units are fit for cooling and heating water orintermediate fluids (glycoled water) for air-condition-

Version Description

Options Description

SLS/SLH Standard version (BLN)SLS/SLH Low Noise version (LN)SLS/SLH Extra Low Noise version (ELN)SLS/SLH High Efficiency/Temperature version (HET)

Chillers/ heat pumps with air condensation, work-ing with R407C (with R22 on demand for extra-Eu-ropean countries)

SLS/DSLH/D

The motor’s terminals are weatherproof, accordingto standard IP-54.

7.4 Refrigeration circuits

The SLS units (8 sizes, 1202 to 3402) are providedwith two independent circuits with screw compres-sors for each circuit and dual circuit plate-type heatexchangers of the “True Dual” type, up to size 2602and with “S&T” shell and tube heat exchanger forthe 3002 and 3402 sizes. The SLS 3804 and 4104twin units are provided with four independent cir-cuits with screw compressors for each circuit anddual circuit plate-type heat exchangers.

The SLH units (6 sizes, 1202 to 2602) are providedwith two independent circuits with screw compres-sors for each circuit and dual circuit plate-type heatexchangers of the “True Dual” type. The SLH 2804 -3204 - 3504 twin units are provided with four inde-pendent circuits with screw compressors for eachcircuit and dual circuit plate-type heat exchangers.

Each refrigerant circuit includes: a service valve forrefrigerant filling, shutoff valves for suction lines (onrequest), as well as for the delivery and liquid lines,a thermostatic expansion valve with external equaliz-er, a solenoid valve that makes i t possible tostart/stop the compressor, a dehydrating cartridgefilter, a sight glass with humidity indicator, a differen-tial oil pressure switch. Furthermore, each circuit isequipped with safety devices in accordance withPED 97/23/EC: high and low pressure switches,

ing applications or industrial processes.The units are fit for outdoor installation of the roof ofa building or at ground level.The series includes the following versions:

Available options:

The heat recovery is carried out through a desuperheater mounted on the compres-sor’s delivery line.

General Description

safety valves providing protection in case of fire ormalfunction of compressors.

7.5 Water heat exchanger

All units, except for SLS 3002 and SLS 3402, areequipped with refrigerant/water heat exchangerswith brazed plates, of “Dual Circuit” type. This typeof heat exchangers makes it possible to obtain ahigh heat exchange efficiency, in spite of its smalloverall dimensions.

The SLS 3002 and SLS 3402 units are provided witha direct-expansion refrigerant/water shell and tubeheat exchanger with several refrigeration circuits.The tube bundle can be removed for inspection ormaintenance. The evaporators are insulated with UVray-proof 19mm-thick anti-condensate closed-cellpolyethylene material.

The external surface is provided with wire resistors(130 Watt), which prevent frosting at low tempera-tures (down to -18°C) when the unit is off.

7.6 Air heat exchanger

Coils are made of copper pipes in staggered rows,mechanically expanded inside an aluminium finnedpack.

7.7 Fans

The condenser’s fans are of large diameter (800mm) axial type. They are provided with external dif-fusers (nozzles), that reduce the aeraulic motor to alarge extent. Each fan is provided with galvanisedsteel accident-prevention guard, painted after assem-bly. Finally, the fans’ motors are completely closed,protection class IP54, protection thermostat im-mersed in windings.

SLS refrigeration diagram

Note: the units are equippedwith two refrigerationcircuits. Only one circuitis illustrated for the sakeof simplicity.

9 Sight glass10 Thermostatic valve11 Solenoid valve12 Plate-type heat exchanger13 Nonreturn valve14 Capillary15 Thermostat16 Desuperheater (optional)

Components:

1 Screw compressor2 Screw compressor’s

delivery cock3 Flexible hose - absorber4 Silencer5 Safety valve6 Coil7 Liquid cock8 Filter

Safety devices:

A HP pressure switchB LP pressure switchC TransducerD Differential water pressure

switchFilling/discharge andpressure intakes Freon

Suction points for vacuumV

English

General Description

7.8 Power supply and control system

All units are provided with a microprocessor and a“Chiller Control” system.

The electrical connection of the controls and the start-up units for the motor are carried out and tested inthe factory. The power supply and control compo-nents are separate and accessible from differentdoors.

A door stop disconnecting switch is always avail-able, and is mounted on the door of the appliance,supply side. The cabinet includes also another door,that can be opened from the top, waterproofed ac-cording to IP 54 standard.

The power supply compartment includes:h Master switchh Network isolator, contactors, compressor fuses

Control panel includes:h A transformer for auxiliaries, fuses, relay and elec-

tronic card, a thermostat for the compressor’s de-livery temperature

h The keyboard and the display of the “Chiller-Con-trol” microcomputer, mounted on the door of thecontrol section.

19

Nota: the units areequipped with two re-frigeration circuits.Only one circuit is il-lustrated for the sakeof simplicity.

10 Sight glass11 Thermostatic valve12 Solenoid valve13 Plate-type heat exchanger14 Liquid separator15 Thermostat16 Oil exchanger17 Desuperheater (optional)18 Safety valve19 Liquid receiver

Components:

1 Screw compressor2 Flexible hose (absorber)3 Silencer4 Reversing valve

(supply in cooling mode)5 Liquid cock6 Safety valve7 Coil8 Nonreturn valve9 Filter

Safety devices:

A HP pressure switchB LP pressure switchC TransducerD Differential water pressure

switch

Filling/discharge andpressure intakes Freon

Suction points for vacuumV

SLH refrigeration diagram

General Description

7.9 “Chiller Control”

The “Chiller Control” unit consists of an expandableinterface card and a controller.

The function of the expandable interface card is tomonitor the inputs and control the outputs:h Digital inputs, such as alarm and control signals.h Analog inputs, such as temperature/pressure mea-

suring signals.h Digital outputs for exciting the control relay and

the remote-control switch.

The microprocessor will execute the logic that con-trols:h The LED and the display of the alarm signals and

the operation of the appliance.h The compressor’s start-up logic (excitation of the

winding and stop), potential regulation (3+3steps).

h The display of the compressor’s working hoursand the temperature of the water to the evapora-tor.

h The anti-cycling and delay timing upon start-up.h The automatic advance/delay sequence for the

compressor start-up.h The fan stop.

Reference and parameter control:h User level: the operator can modify any data with

the ‘ENTER’, ‘+’ and ‘-’ keys.h Service level: password protected access by the

authorised personnel.

7.10 Accessories

List of the available accessories, supplied separately,to be mounted on-site by the installer:

Water flow meter

Prevents the operation of the unit if the circulatingchilled fluid is insufficient. It is recommended to in-stall a flow meter to ensure the correct operation ofthe unit.

Water filter

Filter to be mounted on the suction side of the waterheat exchanger.

Antivibrating supports (AVM)

Isolating spring supports, provided with bolts for fas-tening onto the base. They are supplied separatefrom the unit, and shall be mounted on site at the cus-tomer’s expense.

Remote wall terminal

Makes it possible to control the unit through the re-mote terminal, up to a maximum distance of 200 me-ters.

Chiller black box

Records continuously the essential thermodynamicoperating parameters, during the 10 minutes thatprecede the last alarm.

Modem GSM

Makes it possible to check the working mode or theswitching on/off of the unit via SMS. In case of anyalarms, the unit sends an SMS to the user.

RS-485 MODBUS serial card

A communication interface allows you to control andmanage the unit from a local station, with RS485connection, up to a distance of 1000 m.It is therefore possible to obtain remote control andmanagement by integrating these functions into thebuilding’s control system.

External hydronic kit

Hydronic kits consisting of pumps and storage tanks(1,000 to 1,500 litres).

Single Point supply box

This accessory is available for SLS 3804-4104 andSLH 2804-3204-3504 twin units, and makes it possi-ble to obtain only one power supply point.

English

Technical data

SLS 1202 SLS 1402 SLS 1602 SLS 1902 SLS 2202K 19.3 19.3 13.2 9.8 7.2Min. water flow rate l/s 7.8 8.9 10.1 12.7 15.2Max. water flow rate l/s 20.9 23.6 27.0 33.7 40.5Min. pressure drops kPa 11.8 15.1 13.6 15.7 16.7Max. pressure drops kPa 84.2 107.4 96.4 111.5 118.8

SLS 2602 SLS 3002 SLS 3402 SLS 3804 SLS 4104K 6.4 3.9 3.9 9.8 9.8Min. water flow rate l/s 17.8 19.4 21.4 12.6 13.7Max. water flow rate l/s 47.4 51.7 57.0 33.7 36.6Perdita di carico minima kPa 20.4 14.6 17.7 15.7 18.4Max. pressure drops kPa 145.0 103.8 126.2 111.4 131.2

SLS 1202 SLS 1402 SLS 1602 SLS 1902 SLS 2202 SLS 2602K 575.8 570.3 561.6 263.0 211.5 267.9Min. water flow rate l/s 1.1 1.2 1.4 1.7 2.1 2.4Max. water flow rate l/s 2.9 3.2 3.7 4.6 5.5 6.5Min. pressure drops kPa 6.8 8.4 11.0 7.8 9.1 15.7Max. pressure drops kPa 48.0 59.4 78.1 55.3 64.7 111.6

8 TECHNICAL DATA

8.1 Pressure drops

Evaporator SLS

qP = K Q2 / 10

Desuperheaters for SLS 3804 site refer to technical data of SLS 1902, for SLS 4104 site refer to technical da-ta of SLS 1902 for one circuit and SLS 2202 for other circuit.

Heat exchanger SLS

Technical data

SLH 1202 SLH 1402 SLH 1602 SLH 1902 SLH 2202K 19.3 19.3 13.2 9.8 7.2Min. water flow rate l/s 7.8 8.7 9.8 12.0 13.6Max. water flow rate l/s 20.8 23.3 26.0 31.9 36.3Min. pressure drops kPa 11.7 14.7 12.5 14.0 13.4Max. pressure drops kPa 83.1 104.6 89.2 99.9 95.6

SLH 2602 SLH 2804 SLH 3204 SLH 3504K 6.4 19.3 13.2 13.2Min. water flow rate l/s 15.8 8.7 9.8 10.9Max. water flow rate l/s 42.1 23.3 26.0 29.0Min. pressure drops kPa 16.0 14.7 12.5 15.6Max. pressure drops kPa 114.1 104.6 89.2 110.6

SLH 1202 SLH 1402 SLH 1602 SLH 1902 SLH 2202 SLH 2602K 575.8 570.3 561.6 263.0 211.5 267.9Min. water flow rate l/s 1.1 1.2 1.4 1.6 1.9 2.2Max. water flow rate l/s 2.9 3.2 3.6 4.4 5.0 5.8Min. pressure drops kPa 6.8 8.2 10.3 7.1 7.4 12.6Max. pressure drops kPa 48.1 58.4 73.2 50.3 52.8 89.6

qP = K Q2 / 10

Desuperheaters for SLH 2804 site refer to technical data of SLH 1402, for SLH 3204 site refer to technicaldata of SLH 1602 and SLH 3504 site refer to technical data of SLH 1602 for one circuit and SLH 1902 forother circuit.

Evaporator SLH

Heat exchanger SLH

English

Technical data

8.2 Technical data

SLS BLN 1202 1402 1602 1902 2202Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 2 2Number of steps 6Capacity steps % 25RefrigerantType R407CCharge (1) kg 46+46 52+52 59+59 72+72 89+89CompressorsType ScrewNumber 2 2 2 2 2Start-up type Part-Winding Y/qEvaporatorType Plate typeNumber 1 1 1 1 1Water flow rate l/s 12.5 14.2 16.2 20.2 24.3Pressure drop kPa 30.3 38.7 34.7 40.1 42.8Minimum water content l 26 26 33 40 50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3" 3"WeightsShipping kg 3600 3700 3800 4300 5200Operating kg 3626 3726 3830 4340 5250DimensionsLength mm 4030 4030 4030 4030 6030Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550

(1) Indicative value. Always refer to the value specified on the unit’s label.

Technical data

SLS BLN 2602 3002 3402 3804 4104Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 4 4Number of steps 6 12Capacity steps % 25 12.5RefrigerantType R407CCharge (1) kg 104+104 113+113 125+125 72+72/72+72 80+80/72+72CompressorsType ScrewNumber 2 2 2 4 4Start-up type Y/q Part-WindingEvaporatorType Plate type Shell & Tube Plate typeNumber 1 1 1 2 2Water flow rate l/s 28.5 31.0 34.2 20.2 22.0Pressure drop kPa 52.2 37.4 45.4 40.1 47.2Minimum water content l 50 207 207 40/40 50/50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas thre. male To be welded Gas threaded male typeInlet diameter inch 3" 8" 8" 3" 3"Outlet diameter inch 3" 8" 8" 3" 3"WeightsShipping kg 5750 6250 6390 8600 8680Operating kg 5800 6450 6590 8640 8720DimensionsLength mm 6030 6030 6030 8400 8400Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


English

Technical data

SLS LN 1202 1402 1602 1902 2202Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 2 2Number of steps 6Capacity steps % 25RefrigerantType R407CCharge (1) kg 46+46 52+52 59+59 72+72 89+89CompressorsType ScrewNumber 2 2 2 2 2Start-up type Part-Winding Y/qEvaporatorType Plate typeNumber 1 1 1 1 1Water flow rate l/s 11.8 13.7 15.6 19.4 23.3Pressure drop kPa 26.8 36.1 32.0 36.8 39.2Minimum water content l 26 26 33 40 50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3" 3"Inlet diameter inch 3" 3" 3" 3" 3"WeightsShipping kg 3600 3700 3800 4300 5200Operating kg 3626 3726 3830 4340 5250DimensionsLength mm 4030 4030 4030 4030 6030Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


Technical data

SLS LN 2602 3002 3402 3804Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 4Number of steps 6 12Capacity steps % 25 12.5RefrigerantType R407CCharge (1) kg 104+104 113+113 125+125 72+72/72+72CompressorsType ScrewNumber 2 2 2 4Start-up type Y/q Part-WindingEvaporatorType Plate type Shell & Tube Plate typeNumber 1 1 1 2Water flow rate l/s 27.1 29.9 32.9 19.4Pressure drop kPa 47.4 34.7 41.9 36.8Minimum water content l 50 207 207 40/40CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas thre. male To be welded Gas thre. maleInlet diameter inch 3" 8" 8" 3"Outlet diameter inch 3" 8" 8" 3"WeightsShipping kg 5750 6250 6390 8600Operating kg 5800 6450 6590 8640DimensionsLength mm 6030 6030 6030 8400Width mm 2200 2200 2200 2200Height mm 2550 2550 2550 2550


English

Technical data

SLS ELN 1202 1402 1602 1902 2202Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 2 2Number of steps 6Capacity steps % 25RefrigerantType R407CCharge (1) kg 46+46 52+52 59+59 72+72 89+89CompressorsType ScrewNumber 2 2 2 2 2Start-up type Part-Winding Y/qEvaporatorType Plate typeNumber 1 1 1 1 1Water flow rate l/s 11.8 13.4 15.7 19.0 22.9Pressure drop kPa 26.8 34.8 32.5 35.5 38.0Minimum water content l 26 26 33 40 50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3" 3"WeightsShipping kg 3700 3900 4030 5200 5500Operating kg 3726 3926 4060 5240 5550DimensionsLength mm 4030 4030 4030 6030 6030Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


Technical data

SLS ELN 2602 3002 3402 3804 4104Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 4 4Number of steps 6 12Capacity steps % 25 12.5RefrigerantType R407CCharge (1) kg 104+104 113+113 125+125 72+72/72+72 80+80/72+72CompressorsType ScrewNumber 2 2 2 4 4Start-up type Y/q Part-WindingEvaporatorType Plate type Shell & Tube PiastreNumber 1 1 1 2 2Water flow rate l/s 26.7 29.3 32.8 19.2 21.1Pressure drop kPa 46.0 33.2 41.8 36.0 43.6Minimum water content l 50 207 207 40/40 50/50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas thre. male To be welded Gas threaded male typeInlet diameter inch 3" 8" 8" 3" 3"Outlet diameter inch 3" 8" 8" 3" 3"WeightsShipping kg 6050 6540 6610 8970 9030Operating kg 6100 6750 6820 9050 9130DimensionsLength mm 6030 6030 6030 8400 8400Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


English

Technical data

SLS HET 1202 1402 1602 1902 2202Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 2 2Number of steps 6Capacity steps % 25RefrigerantType R407CCharge (1) kg 46+46 52+52 59+59 72+72 89+89CompressorsType ScrewNumber 2 2 2 2 2Start-up type Part-Winding Y/qEvaporatorType Plate typeNumber 1 1 1 1 1Water flow rate l/s 12.9 14.5 17.0 20.7 25.2Pressure drop kPa 31.9 40.8 38.0 41.8 46.1Minimum water content l 26 26 33 40 50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3" 3"WeightsShipping kg 3700 3900 4030 5200 5500Operating kg 3726 3926 4060 5240 5550DimensionsLength mm 4030 4030 4030 6030 6030Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


Technical data

SLS HET 2602 3002 3402 3804 4104Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 4 4Number of steps 6 12Capacity steps % 25 12.5RefrigerantType R407CCharge (1) kg 104+104 113+113 125+125 72+72/72+72 80+80/72+72CompressorsType ScrewNumber 2 2 2 4 4Start-up type Y/q Part-WindingEvaporatorType Plate type Shell & Tube Plate typeNumber 1 1 1 2 2Water flow rate l/s 29.6 32.2 35.0 20.5 22.3Pressure drop kPa 56.3 40.2 47.6 41.2 48.7Minimum water content l 50 207 207 40/40 50/50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas thre. male. To be welded Gas threaded male typeInlet diameter inch 3" 8" 8" 3" 3"Outlet diameter inch 3" 8" 8" 3" 3"WeightsShipping kg 6050 6540 6610 8970 9030Operating kg 6100 6750 6820 9050 9130DimensionsLength mm 6030 6030 6030 8400 8400Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


English

Technical data

SLH BLN 1202 1402 1602 1902 2202Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 2 2Number of steps 6Capacity steps % 25RefrigerantType R407CCharge (1) kg 41+41 46+46 52+52 65+65 78+78CompressorsType ScrewNumber 2 2 2 2 2Start-up type Part-Winding Y/qEvaporatorType Plate typeNumber 1 1 1 1 1Water flow rate l/s 12.5 14.0 15.6 19.2 21.8Pressure drop kPa 29.9 37.6 32.1 36.0 34.4Minimum water content l 26 26 33 40 50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3" 3"WeightsShipping kg 3600 3700 3800 4300 5200Operating kg 3626 3726 3830 4340 5250DimensionsLength mm 4030 4030 4030 4030 6030Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


Technical data

SLH BLN 2602 2804 3204 3504Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 4 4 4Number of steps 6 12Capacity steps % 25 12.5RefrigerantType R407CCharge (1) kg 93+93 46+46/46+46 52+52/52+52 65+65/52+52CompressorsType ScrewNumber 2 4 4 4Start-up type Y/q Part-WindingEvaporatorType Plate typeNumber 1 2 2 2Water flow rate l/s 25.2 14.0 15.6 17.4Pressure drop kPa 41.1 37.6 32.1 39.8Minimum water content l 50 26/26 33/33 33/40CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3"WeightsShipping kg 5750 7400 7600 8100Operating kg 5800 7452 7660 8170DimensionsLength mm 6030 8400 8400 8400Width mm 2200 2200 2200 2200Height mm 2550 2550 2550 2550


English

Technical data

SLH LN 1202 1402 1602 1902 2202Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 2 2Number of steps 6Capacity steps % 25RefrigerantType R407CCharge (1) kg 41+41 46+46 52+52 65+65 78+78CompressorsType ScrewNumber 2 2 2 2 2Start-up type Part-Winding Y/qEvaporatorType Plate typeNumber 1 1 1 1 1Water flow rate l/s 11.8 13.5 15.0 18.4 20.8Pressure drop kPa 27.0 35.0 29.6 33.0 31.5Minimum water content l 26 26 33 40 50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3" 3"WeightsShipping kg 3600 3700 3800 4300 5200Operating kg 3626 3726 3830 4340 5250DimensionsLength mm 4030 4030 4030 4030 6030Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


Technical data

SLH LN 2602 2804 3204 3504Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 4 4 4Number of steps 6 12Capacity steps % 25 12.5RefrigerantType R407CCharge (1) kg 93+93 46+46/46+46 52+52/52+52 65+65/52+52CompressorsType ScrewNumber 2 4 4 4Start-up type Y/q Part-WindingEvaporatorType Plate typeNumber 1 2 2 2Water flow rate l/s 24.0 13.5 15.0 16.7Pressure drop kPa 37.2 35.0 29.6 36.6Minimum water content l 50 26/26 33/33 33/40CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3"WeightsShipping kg 5750 7400 7600 8100Operating kg 5800 7452 7660 8170DimensionsLength mm 6030 8400 8400 8400Width mm 2200 2200 2200 2200Height mm 2550 2550 2550 2550


English

Technical data

SLH ELN 1202 1402 1602 1902 2202Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 2 2Number of steps 6Capacity steps % 25RefrigerantType R407CCharge (1) kg 41+41 46+46 52+52 65+65 78+78CompressorsType ScrewNumber 2 2 2 2 2Start-up type Part-Winding Y/qEvaporatorType Plate typeNumber 1 1 1 1 1Water flow rate l/s 11.8 13.2 15.1 17.9 20.5Pressure drop kPa 26.7 33.5 29.9 31.5 30.4Minimum water content l 26 26 33 40 50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3" 3"WeightsShipping kg 3700 3900 4030 5200 5500Operating kg 3726 3926 4060 5240 5550DimensionsLength mm 4030 4030 4030 6030 6030Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


Technical data

SLH ELN 2602 2804 3204 3504Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 4 4 4Number of steps 6 12Capacity steps % 25 12.5RefrigerantType R407CCharge (1) kg 93+93 46+46/46+46 52+52/52+52 65+65/52+52CompressorsType ScrewNumber 2 4 4 4Start-up type Y/q Part-WindingEvaporatorType Plate typeNumber 1 2 2 2Water flow rate l/s 23.6 13.2 15.1 16.4Pressure drop kPa 35.9 33.5 29.9 35.3Minimum water content l 50 26/26 33/33 33/40CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3"WeightsShipping kg 6050 7800 8060 8530Operating kg 6100 7852 8120 8600DimensionsLength mm 6030 8400 8400 8400Width mm 2200 2200 2200 2200Height mm 2550 2550 2550 2550


English

Technical data

SLH HET 1202 1402 1602 1902 2202Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 2 2 2 2Number of steps 6Capacity steps % 25RefrigerantType R407CCharge (1) kg 41+41 46+46 52+52 65+65 78+78CompressorsType ScrewNumber 2 2 2 2 2Start-up type Part-Winding Y/qEvaporatorType Plate typeNumber 1 1 1 1 1Water flow rate l/s 12.9 14.3 16.3 19.9 22.5Pressure drop kPa 31.9 39.4 35.0 38.7 36.8Minimum water content l 26 26 33 40 50CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3" 3"WeightsShipping kg 3700 3900 4030 5200 5500Operating kg 3726 3926 4060 5240 5550DimensionsLength mm 4030 4030 4030 6030 6030Width mm 2200 2200 2200 2200 2200Height mm 2550 2550 2550 2550 2550


Technical data

SLH HET 2602 2804 3204 3504Nominal voltage V/ph/Hz 400/3/50Number of circuits 2 4 4 4Number of steps 6 12Capacity steps % 25 12.5RefrigerantType R407CCharge (1) kg 93+93 46+46/46+46 52+52/52+52 65+65/52+52CompressorsType ScrewNumber 2 4 4 4Start-up type Y/q Part-WindingEvaporatorType Plate typeNumber 1 2 2 2Water flow rate l0/s 26.1 14.3 16.3 17.8Pressure drop kPa 44.0 39.4 35.0 42.0Minimum water content l 50 26/26 33/33 33/40CondenserType Coil type (Al/CU)Hydraulic connectionsType Gas threaded male typeInlet diameter inch 3" 3" 3" 3"Outlet diameter inch 3" 3" 3" 3"WeightsShipping kg 6050 7800 8060 8530Operating kg 6100 7852 8120 8600DimensionsLength mm 6030 8400 8400 8400Width mm 2200 2200 2200 2200Height mm 2550 2550 2550 25500


English

Technical data

8.3 Electrical data

SLS Base Low Noise Version

SLS BLN 1202 1402 1602 1902 2202Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 106 126 142 173 205Max power input kW 125 147 167 203 241Nominal current A 191 227 256 312 370Max. current (FLA) A 208 272 304 368 424Max. start-up current (LRA) A 456 391 473 645 445External fuses (A) 315 315 315 400 500Wire cross area (1) mm2 240 240 240 2x120 2x150CompressorsNumber n° 2 2 2 2 2Nominal power input kW 2x49 2x57 2x65 2x79 2x95Max power input kW 2x58 2x68 2x77 2x94 2x113Nominal current A 2x87 2x102 2x116 2x140 2x169Max. current (FLA) A 2x96 2x124 2x140 2x168 2x196Max. start-up current (LRA) A 2x373 2x280 2x351 2x495 2x276Oil treater power input W 200 200 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 4 6 6 8 8Rated power per fan kW 2 2 2 2 2Max. absorbed current per fan A 4 4 4 4 4

(1) The dimensioning of the unit’s power cables is the responsibility of the installer, who shall consider: the rating, the maximum working temperaturein the room, the type of insulation and the cable laying, the maximum length of the power supply line.

SLS BLN 2602 3002 3402 3804 4104Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 239 266 293 173+173 205+173Max power input kW 281 313 341 203+203 241+203Nominal current A 429 480 528 312+312 370+312Max. current (FLA) A 482 530 588 368+368 424+368Max. start-up current (LRA) A 544 586 690 645+645 445+645External fuses (A) 630 630 630 400+400 500+400Wire cross area (1) mm2 2x185 2x185 2x185 2x120/2x120 2x150/2x120CompressorsNumber n° 2 2 2 4 4Nominal power input kW 2x111 2x123 2x135 4x79 2x95+2x79Max power input kW 2x132 2x147 2x158 4x94 2x113+2x94Nominal current A 2x199 2x220 2x240 4x140 2x169+2x140Max. current (FLA) A 2x225 2x245 2x270 4x168 2x196+2x168Max. start-up current (LRA) A 2x354 2x374 2x453 4x495 2x276+2x495Oil pan resistor W 275 275 275 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 8 10 12 16 16Rated power per fan kW 2 2 2 2 2Max. absorbed current per fan A 4 4 4 4 4

Technical data

SLS Low Noise Version

SLS LN 2602 3002 3402 3804Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 239 266 293 173+173Max power input kW 281 313 341 203+203Nominal current A 429 480 528 312+312Max. current (FLA) A 482 530 588 368+368Max. start-up current (LRA) A 544 586 690 645+645External fuses (A) 630 630 630 400+400Wire cross area (1) mm2 2x185 2x185 2x185 2x120/2x120CompressorsNumber n° 2 2 2 4Nominal power input kW 2x111 2x123 2x135 4x79Max power input kW 2x132 2x147 2x158 4x94Nominal current A 2x199 2x220 2x240 4x140Max. current (FLA) A 2x225 2x245 2x270 4x168Max. start-up current (LRA) A 2x354 2x374 2x453 4x495Oil treater power input W 275 275 275 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 8 10 12 16Rated power per fan kW 2 2 2 2Max. absorbed current per fan A 4 4 4 4

SLS LN 1202 1402 1602 1902 2202Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 106 126 142 173 205Max power input kW 125 147 167 203 241Nominal current A 191 227 256 312 370Max. current (FLA) A 208 272 304 368 424Max. start-up current (LRA) A 456 391 473 645 445External fuses (A) 315 315 315 400 500Wire cross area (1) mm2 240 240 240 2x120 2x150CompressorsNumber n° 2 2 2 2 2Nominal power input kW 2x49 2x57 2x65 2x79 2x95Max power input kW 2x58 2x68 2x77 2x94 2x113Nominal current A 2x87 2x102 2x116 2x140 2x169Max. current (FLA) A 2x96 2x124 2x140 2x168 2x196Max. start-up current (LRA) A 2x373 2x280 2x351 2x495 2x276Oil treater power input W 200 200 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 4 6 6 8 8Rated power per fan kW 2 2 2 2 2Max. absorbed current per fan A 4 4 4 4 4


English

Technical data

SLS ELN 1202 1402 1602 1902 2202Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 106 121 140 167 199Max power input kW 124 143 165 197 235Nominal current A 189 217 251 299 356Max. current (FLA) A 206 262 298 354 410Max. start-up current (LRA) A 454 381 467 631 432External fuses (A) 315 315 315 400 500Wire cross area (1) mm2 240 240 240 2x120 2x150CompressorsNumber n° 2 2 2 2 2Nominal power input kW 2x49 2x57 2x65 2x79 2x95Max power input kW 2x58 2x68 2x77 2x94 2x113Nominal current A 2x87 2x102 2x116 2x140 2x169Max. current (FLA) A 2x96 2x124 2x140 2x168 2x196Max. start-up current (LRA) A 2x373 2x280 2x351 2x495 2x276Oil treater power input W 200 200 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 6 6 8 8 8Rated power per fan kW 1.25 1.25 1.25 1.25 1.25Max. absorbed current per fan A 2.3 2.3 2.3 2.3 2.3


SLS ELN 2602 3002 3402 3804 4104Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 235 261 284 167+167 199+167Max power input kW 277 308 332 197+197 235+197Nominal current A 420 467 508 299+299 356+299Max. current (FLA) A 473 518 568 354+354 410+354Max. start-up current (LRA) A 535 573 670 631+631 432+631External fuses (A) 630 630 630 400+400 500+400Wire cross area (1) mm2 2x185 2x185 2x185 2x120/2x120 2x150/2x120CompressorsNumber n° 2 2 2 4 4Nominal power input kW 2x111 2x123 2x135 4x79 2x95+2x79Max power input kW 2x132 2x147 2x158 4x94 2x113+2x94Nominal current A 2x199 2x220 2x240 4x140 2x169+2x140Max. current (FLA) A 2x225 2x245 2x270 4x168 2x196+2x168Max. start-up current (LRA) A 2x354 2x374 2x453 4x495 2x276+2x495Oil treater power input W 275 275 275 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 10 12 12 16 16Rated power per fan kW 1.25 1.25 1.25 1.25 1.25Max. absorbed current per fan A 2.3 2.3 2.3 2.3 2.3

SLS Extra Low Noise Version

Technical data

SLS HET 1202 1402 1602 1902 2202Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 110 126 146 173 205Max power input kW 129 147 171 203 241Nominal current A 199 227 264 312 370Max. current (FLA) A 216 272 312 368 424Max. start-up current (LRA) A 464 391 481 645 445External fuses (A) 315 315 315 400 500Wire cross area (1) mm2 240 240 240 2x120 2x150CompressorsNumber n° 2 2 2 2 2Nominal power input kW 2x49 2x57 2x65 2x79 2x95Max power input kW 2x58 2x68 2x77 2x94 2x113Nominal current A 2x87 2x102 2x116 2x140 2x169Max. current (FLA) A 2x96 2x124 2x140 2x168 2x196Max. start-up current (LRA) A 2x373 2x280 2x351 2x495 2x276Oil treater power input W 200 200 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 6 6 8 8 8Rated power per fan kW 2 2 2 2 2Max. absorbed current per fan A 4 4 4 4 4


SLS HET 2602 3002 3402 3804 4104Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 243 270 293 173+173 205+173Max power input kW 285 317 341 203+203 241+203Nominal current A 437 488 528 312+312 370+312Max. current (FLA) A 490 538 588 368+368 424+368Max. start-up current (LRA) A 552 594 690 645+645 445+645External fuses (A) 630 630 630 400+400 500+400Wire cross area (1) mm2 2x185 2x185 2x185 2x120/2x120 2x150/2x120CompressorsNumber n° 2 2 2 4 4Nominal power input kW 2x111 2x123 2x135 4x79 2x95+2x79Max power input kW 2x132 2x147 2x158 4x94 2x113+2x94Nominal current A 2x199 2x220 2x240 4x140 2x169+2x140Max. current (FLA) A 2x225 2x245 2x270 4x168 2x196+2x168Max. start-up current (LRA) A 2x354 2x374 2x453 4x495 2x276+2x495Oil treater power input W 275 275 275 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 10 12 12 16 16Rated power per fan kW 2 2 2 2 2Max. absorbed current per fan A 4 4 4 4 4

SLS High Efficiency / High Ambient Temperature Version

English

Technical data

SLH Base Low Noise Version

SLH BLN 1202 1402 1602 1902 2202Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 106 126 142 173 205Max power input kW 125 147 167 203 241Nominal current A 191 227 256 312 370Max. current (FLA) A 208 272 304 368 424Max. start-up current (LRA) A 456 391 473 645 445External fuses (A) 315 315 315 400 500Wire cross area (1) mm2 240 240 240 2x120 2x150CompressorsNumber n° 2 2 2 2 2Nominal power input kW 2x49 2x57 2x65 2x79 2x95Max power input kW 2x58 2x68 2x77 2x94 2x113Nominal current A 2x87 2x102 2x116 2x140 2x169Max. current (FLA) A 2x96 2x124 2x140 2x168 2x196Max. start-up current (LRA) A 2x373 2x280 2x351 2x495 2x276Oil treater power input W 200 200 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 4 6 6 8 8Rated power per fan kW 2 2 2 2 2Max. absorbed current per fan A 4 4 4 4 4


SLH BLN 2602 2804 3204 3504Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 239 126+126 142+142 173+142Max power input kW 281 147+147 167+167 203+167Nominal current A 429 227+227 256+256 312+256Max. current (FLA) A 482 272+272 304+304 368+304Max. start-up current (LRA) A 544 391+391 473+473 645+473External fuses (A) 630 315+315 315+315 400+315Wire cross area (1) mm2 2x185 240/240 240/240 2x120/240CompressorsNumber n° 2 4 4 4Nominal power input kW 2x111 4x57 4x65 2x79+2x65Max power input kW 2x132 4x68 4x77 2x94+2x77Nominal current A 2x199 4x102 4x116 2x140+2x116Max. current (FLA) A 2x225 4x124 4x140 2x168+2x140Max. start-up current (LRA) A 2x354 4x280 4x351 2x495+2x351Oil treater power input W 275 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 8 12 12 14Rated power per fan kW 2 2 2 2Max. absorbed current per fan A 4 4 4 4

Technical data

SLH Low Noise Version

SLH LN 2602 2804 3204 3504Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 239 126+126 142+142 173+142Max power input kW 281 147+147 167+167 203+167Nominal current A 429 227+227 256+256 312+256Max. current (FLA) A 482 272+272 304+304 368+304Max. start-up current (LRA) A 544 391+391 473+473 645+473External fuses (A) 630 315+315 315+315 400+315Wire cross area (1) mm2 2x185 240/240 240/240 2x120/240CompressorsNumber n° 2 4 4 4Nominal power input kW 2x111 4x57 4x65 2x79+2x65Max power input kW 2x132 4x68 4x77 2x94+2x77Nominal current A 2x199 4x102 4x116 2x140+2x116Max. current (FLA) A 2x225 4x124 4x140 2x168+2x140Max. start-up current (LRA) A 2x354 4x280 4x351 2x495+2x351Oil treater power input W 275 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 8 12 12 14Rated power per fan kW 2 2 2 2Max. absorbed current per fan A 4 4 4 4

SLH LN 1202 1402 1602 1902 2202Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 106 126 142 173 205Max power input kW 125 147 167 203 241Nominal current A 191 227 256 312 370Max. current (FLA) A 208 272 304 368 424Max. start-up current (LRA) A 456 391 473 645 445External fuses (A) 315 315 315 400 500Wire cross area (1) mm2 240 240 240 2x120 2x150CompressorsNumber n° 2 2 2 2 2Nominal power input kW 2x49 2x57 2x65 2x79 2x95Max power input kW 2x58 2x68 2x77 2x94 2x113Nominal current A 2x87 2x102 2x116 2x140 2x169Max. current (FLA) A 2x96 2x124 2x140 2x168 2x196Max. start-up current (LRA) A 2x373 2x280 2x351 2x495 2x276Oil treater power input W 200 200 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 4 6 6 8 8Rated power per fan kW 2 2 2 2 2Max. absorbed current per fan A 4 4 4 4 4


English

Technical data

SLH Extra Low Noise Version

SLH ELN 1202 1402 1602 1902 2202Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 106 126 140 167 199Max power input kW 124 143 165 197 235Nominal current A 189 217 251 299 356Max. current (FLA) A 206 262 298 354 410Max. start-up current (LRA) A 454 381 467 631 432External fuses (A) 315 315 315 400 500Wire cross area (1) mm2 240 240 240 2x120 2x150CompressorsNumber n° 2 2 2 2 2Nominal power input kW 2x49 2x57 2x65 2x79 2x95Max power input kW 2x58 2x68 2x77 2x94 2x113Nominal current A 2x87 2x102 2x116 2x140 2x169Max. current (FLA) A 2x96 2x124 2x140 2x168 2x196Max. start-up current (LRA) A 2x373 2x280 2x351 2x495 2x276Oil treater power input W 200 200 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 6 6 8 8 8Rated power per fan kW 1.25 1.25 1.25 1.25 1.25Max. absorbed current per fan A 2.3 2.3 2.3 2.3 2.3


SLH ELN 2602 2804 3204 3504Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 235 121+121 140+140 167+140Max power input kW 277 143+143 165+165 197+165Nominal current A 420 217+217 251+251 299+251Max. current (FLA) A 473 262+262 298+298 354+298Max. start-up current (LRA) A 535 381+381 467+467 631+467External fuses (A) 630 315+315 315+315 400+315Wire cross area (1) mm2 2x185 240/240 240/240 2x120/240CompressorsNumber n° 2 4 4 4Nominal power input kW 2x111 4x57 4x65 2x79+2x65Max power input kW 2x132 4x68 4x77 2x94+2x77Nominal current A 2x199 4x102 4x116 2x140+2x116Max. current (FLA) A 2x225 4x124 4x140 2x168+2x140Max. start-up current (LRA) A 2x354 4x280 4x351 2x495+2x351Oil treater power input W 275 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 10 12 16 16Rated power per fan kW 1.25 1.25 1.25 1.25Max. absorbed current per fan A 2.3 2.3 2.3 2.3

Technical data

SLH High Efficiency / High Ambient Temperature Version

SLH HET 2602 2804 3204 3504Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 243 126+126 146+146 173+146Max power input kW 285 147+147 171+171 203+171Nominal current A 437 227+227 267+267 312+264Max. current (FLA) A 490 272+272 312+312 368+312Max. start-up current (LRA) A 552 391+391 481+481 645+481External fuses (A) 630 315+315 315+315 400+315Wire cross area (1) mm2 2x185 240/240 240/240 2x120/240CompressorsNumber n° 2 4 4 4Nominal power input kW 2x111 4x57 4x65 2x79+2x65Max power input kW 2x132 4x68 4x77 2x94+2x77Nominal current A 2x199 4x102 4x116 2x140+2x116Max. current (FLA) A 2x225 4x124 4x140 2x168+2x140Max. start-up current (LRA) A 2x354 4x280 4x351 2x495+2x351Oil treater power input W 275 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 10 12 16 16Rated power per fan kW 2 2 2 2Max. absorbed current per fan A 4 4 4 4

SLH HET 1202 1402 1602 1902 2202Nominal voltage V(%)-ph-Hz 400 ±10% / 3 / 50Nominal power input kW 110 126 146 173 205Max power input kW 129 147 171 203 241Nominal current A 199 227 264 312 370Max. current (FLA) A 216 272 312 368 424Max. start-up current (LRA) A 464 391 481 645 445External fuses (A) 315 315 315 400 500Wire cross area (1) mm2 240 240 240 2x120 2x150CompressorsNumber n° 2 2 2 2 2Nominal power input kW 2x49 2x57 2x65 2x79 2x95Max power input kW 2x58 2x68 2x77 2x94 2x113Nominal current A 2x87 2x102 2x116 2x140 2x169Max. current (FLA) A 2x96 2x124 2x140 2x168 2x196Max. start-up current (LRA) A 2x373 2x280 2x351 2x495 2x276Oil treater power input W 200 200 200 200 200Standard fansPower supply V-ph-Hz 400 ±10% / 3 / 50Number n° 6 6 8 8 8Rated power per fan kW 2 2 2 2 2Max. absorbed current per fan A 4 4 4 4 4


English

Technical data

8.4 Position of antivibration mounting springs and weight distribution on supports

P1-P6 - Unit position P1-P8 - Unit position

SLS/SLH 1202-1902 BLN/LNSLS/SLH 1202-1602 ELN/HET

SLS 2202-3402 BLN/LN/ELN/HET - SLH 2202-2602 STD/LNSLH 1902-2602 ELN/HET

SLS 3804-4104 BLN/LN/ELN/HETSLH 2804-3504 BLN/LN/ELN/HET

Electrical Board

COMPRESSORSSIDE

ELECTRICAL BOARD

P1

P3

P5

P2

P4

P6

c

e

b

b

e

c

a

Electrical Board

COMPRESSORSSIDE

ELECTRICAL BOARD

P1

P3

P5

P7

P2

P4

P6

P8

c

b

e

d

a

P1-P6 - Unit position

Electrical Board

COMPRESSORSSIDE

ELECTRICAL BOARD

P1

P3

P5

P2

P4

P6

c

e

b

b

e

c

a

Quadro elettrico

P7

P9

P11

P8

P10

P12

c

d

b

b

d

c

Technical data

POSITIONSLS Distribution Weights (kg) Shipping Operating P1-P12

Al/Cu P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 Weight Weight

( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) a (mm) b (mm) c (mm) d (mm) e(mm)1202 600 600 600 600 600 600 - - - - - - 3600 3626 2250 1583 1208 - 6151402 617 617 617 617 617 617 - - - - - - 3700 3726 2250 1583 1208 - 6151602 633 633 633 633 633 633 - - - - - - 3800 3830 2250 1583 1208 - 6151902 717 717 717 717 717 717 - - - - - - 4300 4340 2250 1583 1208 - 6152202 650 650 650 650 650 650 650 650 - - - - 5200 5250 2250 1792 1206 1792 6262602 719 719 719 719 719 719 719 719 - - - - 5750 5800 2250 1792 1206 1792 6263002 781 781 781 781 781 781 781 781 - - - - 6450 6250 2250 1792 1206 1792 6263402 799 799 799 799 799 799 799 799 - - - - 6590 6390 2250 1792 1206 1792 6263804 717 717 717 717 717 717 717 717 717 717 717 717 8640 8600 2250 1583 1208 1233 6154104 737 737 737 737 737 737 717 717 717 717 717 717 8720 8680 2250 1583 1208 1233 615

SLS 1202 - 4104 Base Low Noise and Low Noise Versions

POSITIONSLH Distribution Weights (kg) Shipping Operating P1-P12


( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) a (mm) b (mm) c (mm) d (mm) e(mm)1202 600 600 600 600 600 600 - - - - - - 3600 3626 2250 1583 1208 - 6151402 617 617 617 617 617 617 - - - - - - 3700 3726 2250 1583 1208 - 6151602 633 633 633 633 633 633 - - - - - - 3800 3830 2250 1583 1208 - 6151902 717 717 717 717 717 717 - - - - - - 4300 4340 2250 1583 1208 - 6182202 650 650 650 650 650 650 650 650 - - - - 5200 5250 2250 1792 1206 1792 6262602 719 719 719 719 719 719 719 719 - - - - 5750 5800 2250 1792 1206 1792 6262804 617 617 617 617 617 617 617 617 617 617 617 617 7400 7452 2250 1583 1208 1233 6153204 633 633 633 633 633 633 633 633 633 633 633 633 7600 7660 2250 1583 1208 1233 6153504 717 717 717 717 717 717 633 633 633 633 633 633 8100 8170 2250 1583 1208 1233 615

SLH 1202 - 3504 Base Low Noise and Low Noise Versions

POSITIONSLH Distribution Weights (kg) Shipping Operating P1-P12


( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) a (mm) b (mm) c (mm) d (mm) e(mm)1202 617 617 617 617 617 617 - - - - - - 3700 3726 2250 1583 1208 - 6151402 650 650 650 650 650 650 - - - - - - 3900 3926 2250 1583 1208 - 6151602 672 672 672 672 672 672 - - - - - - 4030 4060 2250 1583 1208 - 6151902 650 650 650 650 650 650 650 650 - - - - 5200 5240 2250 1792 1208 1792 6262202 688 688 688 688 688 688 688 688 - - - - 5500 5550 2250 1792 1206 1792 6262602 756 756 756 756 756 756 756 756 - - - - 6050 6100 2250 1792 1206 1792 6262804 650 650 650 650 650 650 650 650 650 650 650 650 7800 7852 2250 1583 1208 1233 6153204 672 672 672 672 672 672 672 672 672 672 672 672 8060 8120 2250 1583 1208 1233 6153504 750 750 750 750 750 750 672 672 672 672 672 672 8530 8600 2250 1583 1208 1233 615

SLH 1202 - 3504 Extra Low Noise and High Efficiency / High Ambient Temperature Versions

POSITIONSLS Distribution Weights (kg) Shipping Operating P1-P12


( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) ( kg ) a (mm) b (mm) c (mm) d (mm) e(mm)1202 617 617 617 617 617 617 - - - - - - 3700 3726 2250 1583 1208 - 6151402 650 650 650 650 650 650 - - - - - - 3900 3926 2250 1583 1208 - 6151602 672 672 672 672 672 672 - - - - - - 4030 4060 2250 1583 1208 - 6151902 650 650 650 650 650 650 650 650 - - - - 5200 5240 2250 1792 1206 1792 6262202 688 688 688 688 688 688 688 688 - - - - 5500 5550 2250 1792 1206 1792 6262602 756 756 756 756 756 756 756 756 - - - - 6050 6100 2250 1792 1206 1792 6263002 763 763 763 763 763 763 763 763 - - - - 6540 6750 2250 1792 1206 1792 6263402 844 844 844 844 844 844 844 844 - - - - 6610 6820 2250 1792 1206 1792 6263804 754 754 754 754 754 754 754 754 754 754 754 754 8970 9050 2250 1583 1208 1233 6154104 768 768 768 768 768 768 754 754 754 754 754 754 9030 9130 2250 1583 1208 1233 615

SLS 1202 - 4104 Extra Low Noise and High Efficiency / High Ambient Temperature Versions

English

Technical data

8.5 Overall dimensions and maintenance space

SLS 1202 BLN/LN SLH 1202 BLN/LN

2200

2550

130

4030

600

245

628

Technical data

SLS 1202 ELN/HET - SLS 1402 BLN-LN-ELN-HET - SLS 1602 BLN/LNSLH 1202 ELN/HET - SLH 1402 BLN-LN-ELN-HET / SLH 1602 BLN-LN

130

2550

2200 4030

628

245

600

English

Technical data

SLS 1602 ELN/HET - SLS 1902 BLN/LNSLH 1602 ELN/HET - SLH 1902 BLN/LN

2200

130

2550

4030

600

628

245

Technical data

SLS 1902 ELN/HET - SLS 2202 BLN/LN/ELN/HET - SLS 2602 BLN/LNSLH 1902 ELN/HET - SLH 2202 BLN/LN/ELN/HET - SLH 2602 BLN/LN

2200

130

2550

6030

600

628

245

English

Technical data

SLS 2602 ELN/HET - SLS 3002 BLN/LNSLH 2602 ELN/HET

130

2200

2550

6030

600

628

245

Technical data

SLS 3002 BLN/LN

2200

130

2550

6030

2200 1800

460

English

Technical data

SLS 3002 ELN/HET - SLS 3402 BLN/LN/ELN/HET

2200

170

2550

6030

2200 1800

461

Technical data

SLH 2804 BLN/LN/ELN/HETSLH 3204 BLN/LN

2200

130

2550

245

628

6004023

8405

8040

English

Technical data

SLH 3504 BLN/LN

2200

130

2550

245

628

6004023

8405

8040

Technical data

SLS 3804 BLN/LN/ELN/HET - SLS 4104 BLN/LN/ELN/HETSLH 3204 ELN/HET - SLH 3504 ELN -HET

2200

130

2550

245

628

6004023

8405

8040

English

Technical data

8.6 Service spaces

Units SLS/SLH All versions

Installation of Single Units

A and C SCREENED A and B SOLID B and D SCREENED A and B SCREENED A and D SCREENEDB and D SOLID C and D SOLID A and C SOLID C and D SOLID B and D SOLID

A1 A2 A3 A1 A2 A3 A1 A2 A3 A1 A2 A3 A1 A2 A3Arrangement 1 (m) 2 2 2 2 1.5 1.5 1.5 1.5 1.0 2 1.5 1.5 2Arrangement 2 (m) 2 2 2 2 2 2 1.5 2 1.5 1.0 2 2 2 2 2

A wall only may be higher that the units.The area between the walls must be kept free from any obstacle which may hinder the free air inflow towards the unit(s).

Installation of several Units

mm 2000

mm 2000 mm 2000

mm 2000

WALL A

WALL A

1.5 m

1.5 m

A1

A1 A3A2

A2

2.0 m

1.0 m1.0 m

WALL C

ARRANGEMENT 1 ARRANGEMENT 2

WALL C

WALL D

WALL D

WALL B

WALL B

2.0 m

2.0 m

1.5 m

mm 3000

Maintenance

9 MAINTENANCE

Carefully read the “Safety” section of this manualbefore carrying out any maintenance operations.

Do not discharge the refrigerant into the at-mosphere while the refrigeration circuitsare being drained. Use appropriate recov-ery equipment.When the recovered refrigerant cannot bere-used, return it to the manufacturer.

Do not throw away the waste oil of thecompressor, because it contains refrigerantin solution.The waste oil must be returned to the manu-facturer.

Unless otherwise specified, the operations describedbelow may be carried out only by a trained mainte-nance operator.

9.1 General requirements

Itelco-Clima units have been designed for continuousoperation, providing that they are subjected to regu-lar maintenance, within the limits specified in thismanual. Each unit must be serviced according to theprogramme by the User/Customer, and must be in-spected at regular intervals by the personnel of oneof Itelco-Clima’s authorised Service Centers.

It is the responsibility of the User to meet these main-tenance requirements and/or to enter into an agree-ment with one of Itelco-Clima’s Service Centers, soas to properly safeguard the operation of the appli-ance.

During the warranty period, in case of damage orfailures caused by improper maintenance, Itelco-Cli-ma will not refund the costs incurred to repair the ap-pliance in its original state.

The provisions of this section apply only to standardunits; according to the order requirements, otherdocumentation may be added, concerning any mod-ifications or supplementary accessories.

9.2 Planned maintenance

Maintenance inspections must be carried out accord-ing to the program below, by a qualified person.As a general rule, units cannot be repaired directlyby the user, who shall not try to service or repair anyfailures or anomalies identified during daily inspec-tions. If you are in doubt, please contact Itelco-ClimaService Centre.

Scheduled Maintenance

Operations

Daily

Wee

kly

Mon

thly

Begi

nnin

gof

seas

onEn

d of

seas

on

Check the temperature of the leaving fluid

Check the pressure dropsin the heat exchanger

Check for electricabsorption

Check suction pressureand temperature

Check delivery pressureand temperature

Check the oil level in the compressor

Check that there are no gasbubbles in the liquid line

Check that the fins of theexternal coil are clean (if any)

Check the operationof the oil heaters

Check the remotecontrol switches

Check the operationof the LP pressure switch

Check the operationof the HP pressure switch

Check the insulationof the heat exchanger

Check that terminals are tightened

Check that the terminals’ screws are tightened

Clean the exterior of theunit with water and soap

Check the density of the antifreeze (if any)

Check the operation of the flow switches

Check the operation of the solenoid valve

•••••••

•••

••••••• ••• •

English

Maintenance

9.3 Refrigerant charge

Do not inject refrigerant liquid into the LPside of the circuit. Be very careful, andcharge the circuit properly. If the charge isinsufficient, the efficiency of the unit will belower than expected. In the worst of casesthe LP pressure switch may be activated, re-sulting in the halting of the unit.In the presence of an excess charge, thecondensing pressure will rise (in the worstof cases, the HP pressure switch may be ac-tivated, resulting in the stop of the equip-ment), and the consumption will increase aswell.

It is strictly forbidden to use the compressoras a vacuum pump to drain the plant.

Fill the refrigeration circuit after it has been drainedfor maintenance purposes (leaks, replacement of thecompressor etc.). The amount of the charge is indi-cated on the plate affixed to the unit.

Before refilling, it is important to drain and de-hy-drate the circuit, thus obtaining a minimum abs. pres-sure value of 50 Pa.

Inject the refrigerant fluid before removing the vacu-um, then fill the circuit up to 90% of the total gas re-quirement (in liquid form). The appliance must befilled through the filling valve on the liquid line, onthe outlet side of the condenser.

It is recommended to connect the refrigerant cylinderto the filling valve on the liquid line, and to arrange itin such a way as to inject only liquid refrigerant.

Then start the compressor and let the gas flow fromthe cylinder, up until the liquid flow, which can beobserved through the sight glass, is limpid.

9.4 Compressor

The frequency of the checks to be made on compres-sors depends on a variety of factors, first of all theworking conditions. Anyway, it is advisable to adoptthe following tips:h After 300 hours of work, check the conditions of

the oil: a certain amount of impurities from the sys-tem may accumulate in the oil of the compressors.

h Check the acidity of the oil every year.

h After 8000 hours of work, carry out a visual in-spection on the suction/discharge valves for wear.If necessary, replace these components. If com-pressors are started/stopped frequently or in par-ticularly demanding working conditions, it is advis-able to reduce this period to 5000 hours. Anyway,this time is indicative only.

h After 24000 hours of work, carry out a generaloverhaul of the compressor. If the compressorswork for a period shorter than 40% of a year, theoverhaul can be performed every about 5 years.This period depends on the type of application, theworking conditions, the duration of start/stop cy-cles.

If it is necessary to replace the compressor(in case of burning of the winding or me-chanical failure), contact one of Itelco-Cli-ma’s Service Centres.For the versions with R134a and R407C,the compressors use polyester oil. Duringmaintenance operations on the compressor,or if it opens in any point of the refrigerantcircuit, do not forget that this type of oil ishighly hygroscopic, and accordingly do notleave it exposed to the atmosphere, as thiswould require the replacement of the oil.

9.5 Condenser’s coils

The condenser’s coils consist of copper pipes andaluminium fins. In the presence of leaks caused byany damage or shock, the coils shall be repaired orreplaced by one of Itelco-Clima’s authorised ServiceCenters. To ensure the effective and correct opera-tion of the condenser coils, it is important to keep thecondenser’s surface perfectly clean, and to checkthat there is no foreign matter, such as leafs, wires,insects, waste etc. If the coil becomes dirty, there isan increase in the absorption of electric energy. Fur-thermore, the maximum pressure alarm may be acti-vated and may halt the unit.

Be careful not to damage the aluminium finsduring cleaning.

The condenser must be cleaned with a LP com-pressed air jet, parallel to the aluminium fins, in thedirection opposite to the air circulation.

To clean the coil you can use also a vacuum cleaner,or a jet of water and soap.

Maintenance

9.6 Fans

The fans of the condenser, of axial type, are com-plete with impeller with aerodynamic profile bladesand a cylindrical nozzle. The motor’s bearings arelubricated forever.

Before starting the appliance, after any maintenanceoperations involving the disconnection of 3-phaseconnections, check that the direction of rotation ofthe fans is the one indicated by the arrow (upwardair current). If the direction of rotation is wrong, in-vert two of the three supply phases to the motor.

9.7 Dehydrating filter

The refrigeration circuits are provided with dehydrat-ing filters.The filter clogging is marked by the presence of airbubbles in the sight glass, or by the difference be-tween the temperatures measured downstream fromand upstream of the drying filter. If, once the car-tridge has been cleaned, there are still some air bub-bles, the appliance has lost a part of the refrigerantcharge in one or more points, that must be identifiedand serviced.

9.8 Sight glass

The sight glass is used for inspecting the refrigerantflow and the humidity % of the refrigerant. The pres-ence of bubbles indicates that the dehydrating filteris clogged or the charge insufficient.

A colour indicator is positioned inside the sightglass.If you compare the colour of the indicator to the scaleon the ring of the sight glass, you can calculate thepercentage of humidity of the refrigerant. If it is ex-cessive, replace the filter’s cartridge, operate the ap-pliance for 1 day and then check the humidity %again. When the humidity % is within the pre-deter-mined range, no other operations are required. If thehumidity % is still too high, replace the dehydratingfilter again, start the unit and operate it for anotherday.

9.9 Thermostatic expansion valve

The circuit of the unit is equipped with a thermostaticexpansion valve, with external equalizerThe valve is shop-calibrated for an overheating of5°C.

Procedure to check for overheating:– Measure the suction pressure with the pressure

gauges on the board of the unit o using a pressuregauge connected to the service valve on the suc-tion side.

– From the pressure gauge’s temperature scale, mea-sure the saturated suction temperature (Tsa) whichcorresponds to the pressure value.

– Using a contact pressure gauge affixed to the out-let fitting of the gas of the evaporator, measure theactual temperature (Tse).

Overheating calculation (S):

S = Tse - Tsa

Overheating is regulated through the thermostaticexpansion valve.

Make the adjusting screw follow a complete turn,and operate the appliance for five minutes.Check again and, if necessary, repeat the regula-tion.

If the expansion valve cannot be regulated, it is prob-ably broken, and shall be replaced. The replace-ment must be carried out by a Service Centre.

9.10 Evaporator

Check at regular intervals that the water side of theheat exchanger is perfectly clean. To do this, mea-sure the pressure drop, water side (see Section 8) ormeasure the temperature of the liquid leaving andentering the heat exchanger, and compare it to theevaporation temperature.

To obtain an effective heat exchange, the differencebetween the temperature of the leaving water andthe saturated evaporating temperature must be in the2 - 4°C range. A greater difference would indicate alow efficiency of the heat exchanger (i.e. the heat ex-changer is dirty).

In this case, the heat exchanger must be subjected tochemical cleaning, an operation that shall be carriedout by authorised engineers.

For other maintenance operations (extraordinaryoverhauling, replacement of the heat exchangeretc.), contact an authorised Service Centre.

English

Troubleshooting

10 TROUBLESHOOTING

The table below lists the anomalies of operation of the unit, the relevant causes and the corrective measures.For anomalies of any other type or not listed, contact one of Itelco-Clima’s Service Centre for technical assis-tance.

Anomaly Cause Operation

The unit continues to work,but without cooling.

Insufficient charge of refrigerant. Refill.

The dehydrating filter is clogged. Replace.

Ice on the suction line. Wrong calibration of overheating. Increase overheating.

Check the charge.

Excessive noise. Vibration of lines. Check the clamping brackets, if any.

Whistler emitted by the thermostaticexpansion valve.

Refill.

Check the dehydrating filter.

Noisy compressor. Seized bearings; replace the com-pressor.

Check that the compressor’s locknutsare tightened.

Low oil level in the compressor.

One or more gas or oil leaks in thecircuit..

Identify and remove leaks.

Mechanical failure of the compres-sor.

Request the intervention of a ServiceCentre

Anomaly of the oil heater of thecompressor’s base.

Check the electric circuit and the resis-tor of the heater of the motor base,and replace defective components.

Troubleshooting

Anomaly Cause Operation

One or both compressorsare not working.

Breaking of the electric circuit. Check the electric circuit and detectany ground dispersions and short cir-cuits. Check fuses.

Intervention of the HP pressureswitch.

Reset the pressure switch and the con-trol panel and restart the appliance.Identify and remove the cause that en-abled the pressure switch.

The fuse of the control circuit is bro-ken.

Check for ground dispersions andshort circuits. Replace fuses.

Loosened terminals. Check and tighten.

Halt caused by thermal overload ofthe electric circuit.

Check the operation of check andsafety devices. Identify and removethe cause.

Wrong wiring. Check wiring of check and safety de-vices.

The line voltage is too low. Check voltage. If problems regard thesystem, solve them. If they are causedby the distribution network, inform theEnergy Distributor.

Short-circuit of the compressor’s motor.

Check the continuity of the winding.

Seized compressor. Replace the compressor.

Identify and remove the leak.

Insufficient charge Refill.

Failure of the pressure switch. Replace the pressure switch.

Failure of the pressure switch. Check the operation of the pressureswitch, replace it if defective.

The delivery valve is partiallyclosed.

Open the valve and replace it, iffaulty.

Activation of the LP alarm,stop of the unit.

Gas leak.

Activation of the HP alarm,stop of the unit.

Substances with condensable gasesin the circuit.

Drain the circuit.

The fan ( i ) of the condenser isstopped.

Check cables and motor. If defective,repair or replace.

The liquid line is too hot. Insufficient charge. dentify and remove the cause of theloss of charge and refill.

Frosting of the liquid line. The valve of the liquid line is partial-ly closed.

Check that valves are open.

The liquid filter is clogged. Replace the cartridge or the filter.

English

Spare parts

11 SPARE PARTS

11.1 Spare part list

The table below shows the list of spare parts recom-mended during the first two years of operation.

Component NumberHP pressure switch 1Gas filter 2Thermostatic valve 2Auxiliary relays 2Fan’s fuses 6Compressor’s fuses 6Auxiliary fuses 6Set of compressor contactors 1Fan’s contactor 1Water sensor 1Air sensor 1HP pressure transductor 1LP pressure transductor 1Electronic card 1Keyboard 1Compressor oil resistor 1

11.2 Oil for compressors

The compressors are lubricated with oil type DEA SE170.

11.3 Wiring diagrams

The wiring diagrams are installed inside the doors ofthe electrical panels of the unit. Any request forwiring diagrams shall be forwarded to Itelco-Clima’sService Centre.

Dismantling, Demolition and Scrapping

12 DISMANTLING, DEMOLITION AND SCRAPPING

During the draining of the refrigeration cir-cuits, do not let the refrigerant overflow inthe surrounding atmosphere.The circuit must be drained using suitablerecovery equipment.

Do not disperse the waste oil of the com-pressors in the environment, since it con-tains some dissolved refrigerant.

For the disposal, contact the competent authority forinformation.

Unless otherwise specified, the maintenance opera-tions listed below may be carried out by any trainedmaintenance operator.

12.1 Generalities

Open each line that supplies the unit, including theones of control circuits. Make sure that all discon-necting switches are secured in the off position. Thepower cables can be disconnected and disassem-bled. Refer to Chapter 4 for the position of connec-tion points.

Remove all the refrigerant from the refrigeration cir-cuits of the unit and store it in suitable containers, us-ing a recovery unit. If its characteristics have re-mained the same, the refrigerant can be used again.Contact the competent authority to obtain informa-tion about disposal. In NO event shall the refrigerantbe discharged into the atmosphere. The oil in eachrefrigeration circuit must be drained and collected in-to a suitable container; then it shall be disposes of inconformity with local regulations that apply to thedisposal of waste lubricants. Any oil spillage must berecovered and disposed of in like manner.

Isolate the unit’s heat exchangers from the externalhydraulic circuits and drain the heat exchange sec-tions of the plant. If no isolation valves are installedon the cooler it might be necessary to drain the com-plete hydronic system.

If no shutoff valves have been provided, itmay be necessary to drain the whole plant.If a glycoled solution or a similar fluid hasbeen used in the hydraulic circuits, or ifchemical additives have been added to thecirculating water, the circulating fluid MUSTbe drained in a proper way.For NO reason shall a circuit containingglycoled water or a similar solution be dis-charged directly into the drains or surfacewaters.

After draining operations, the piping of the hydraulicnetworks can be disconnected and disassembled.

Once they have been disconnected as specified, thepackaged units can be disassembled in a singlepiece. First of all, disassemble the anchoring screwsand then lift the unit from the position of installation,and hook it to the lifting points provided, using suit-able lifting equipment.

To this end, refer to Chapter 4 for the installation ofthese appliances, to Chapter 8 for their weights andChapter 3 for handling.The units that, once disconnected, cannot be re-moved in a single piece, must be dismantled on site;in this case, be very careful with the weight and han-dling of every single component.

It is always advisable to dismantle the units followingthe installation steps, but in reverse.

Some residues of oil, glycoled water or sim-ilar solutions may remain in certain parts ofthe unit. These residues must be recoveredand disposed of according to the proce-dures specified above.

It is very important to ensure that, while a componentof the unit is being removed, all the others are prop-erly supported.

Use only lifting means of adequate capaci-ty.

Once disassembled, the components of the unit canbe disposed of in conformity with current regula-tions.

SLS/SLH - · PDF filePage 3 Foreword 1 FOREWORD English 1.1 Introduction Itelco-Clima units,...

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