RMAS 20 E - RAD - ING - MAN.INST - 0809B - DIGITECH.pdf

8/14/2019 RMAS 20 E - RAD - ING - MAN.INST - 0809B - DIGITECH.pdf

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CONTENTS

1. General information

1.1 General warnings pag. 1

1.2 Product conformity pag. 3

2. Technical characterist ics

2.1 Technical data pag. 4

2.2 Dimensions pag. 5

2.3 Internal parts of the boiler pag. 6

2.4 Water circuit pag. 7

2.5 Circulation pump head/flow graph pag. 8

2.6 Printed circuit board Technical characteristics pag. 9

2.7 Control panel pag. 9

3. Installation (authorised personnel)

3.1 Reference standard pag. 10

3.2 Boiler room installation requirements pag. 10

3.3 Unpacking pag. 11

3.4 Installation boiler pag. 12

3.5 Water connections pag. 13

3.6 Gas connection pag. 14

3.7 Electrical connections pag. 153.8 Flue connections pag. 17

4. Commission ing the appliance (authorised personnel)


4.2 Filling the system pag. 25

4.3 Flushing the system pag. 26

4.4 Starting up the boiler pag. 27

5. Regulating the appliance (authorised personnel)

5.1 Parameters table pag. 28

5.2 Parameters programming pag. 29

5.3 Regulating the gas pressure pag. 32

5.4 Gas data pag. 35

5.5Converting the boiler to a different gas type pag. 36


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CONTENTS

6. Maintenance (authorised personnel)


6.2 Boiler inspection pag. 37

6.3 Accessing the boiler pag. 38

6.4 Draining the central heating and domestic hot water system pag. 39

6.5 Wiring diagrams pag. 40

6.6 Troubleshooting pag. 46

6.7 Diagnostics pag. 47

6.8 Parts list pag. 48


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GENERAL INFORMATION

1

1. GENERAL INFORMATION

1.1 General warnings

Professionally qualified personnel in accordance with current laws and standards and in line withthe manufacturers ins tructions must i nstall the appliance.

With Professionally qualified personnel is intended a personnel with technical knowledge in thefield of installation and maintenance of components for central heating and domestic hot waterproduct ion systems for domestic and industr ial use.

The appliance must be used solely for the purpose for which it has been designed andmanufactured: central heating and domestic hot water production. Any other use is deemed asimproper and as such dangerous. Under no circumstances will the manufacturer be heldresponsible for damage or injury to persons or animals caused by errors in the installation and/oruse of the appliance, or through non-compliance with current local and national standards and/orthe manufacturers instructions.

The installation, operation and maintenance manual forms an integral and essential part of theproduct and must be kept near the appliance always.

This manual must be kept in a safe place and made available for any future reference. If theappliance is sold or transferred to a different owner, this mus t follow the appliance to be red by thenew owner and/or ins taller.

The warnings contained in this chapter have been writ ten for the appliance user, the installer andthe service engineer.

The user manual must be red carefully as it provides information on the operation and theoperating limits of the appliance.

This appliance must be used exclusively in a pressurised central heating system.

After the removal of all the packaging, check that the appliance has not been damaged. In case of doubt, do notattempt to use the product but refer to the supplier. Packing materials (cardboard box, wooden crate, nails,staples, plastic bags, polystyrene, etc.) must not be left within reach of children in that these items represent apotential hazard and must be disposed of in a responsible manner.

Before carrying out any cleaning or maintenance operations, disconnect the appliance from the mains electricitysupply by switching off at the main switch and/or any other isolating device.

Do not obstruct the air intake or flue exhaust grills.

Do not obstruct the air intake or flue exhaust terminals.

In the case of a fault and/or malfunction in the appliance, shut down the system. Do not interfere with or attemptany repairs. Call for professionally qualified technical assistance only.

Any warranty repairs to the appliance must be carried out exclusively by the manufacturers authorised servicecentre using original spare parts. Non-compliance with the above requirements may compromise the safety ofthe appliance and invalidate the warranty. In order to guarantee the efficiency of the appliance and its correctoperation, it must be serviced regularly by professionally qualified personnel in line with the manufacturersinstructions.

When the appliance is no longer required for use, any parts that may constitute potential sources of dangermust be rendered harmless.

Only original accessories or optional extras (including electrical parts) must be used with the appliance.

Should there be a smell of gas present in the room where the appliance is installed, DO NOT attempt to activateany electric switches, telephones or any other equipment that may cause sparks. Open doors and windowsimmediately to create a current of air and ventilate the room. Shut-off the main gas supply valve (at the meter),or on the cylinder in the case of bottled gas, and call an authorised service centre.

Do not attempt to i nterfere with the appliance in any way.


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GENERAL INFORMATION

2

As dictated by current legislation, this appliance must be installed exclusively by qualified personnel.Beforestarting the boiler for the first time, make sure that it is connected to a water supply and central heating systemcompatible with its performance characteristics.

The room must be ventilated by means of an air intake positioned at floor level and protected with a grill. Makesure the grill does not reduce the passage section.

The air inflow from adjacent rooms is allowed providing that those rooms are in depression with respect to the

atmosphere and that there are not fireplace or fan installed. When the appliance is installed outdoor, i.e. onbalcony or terrace, make sure it is not directly exposed to atmospheric agents to prevent any damage tocomponents which would lead to a warranty invalidation. It is recommended to provide the boiler with aprotective casing/box against bad whether conditions.

Check the technical data reported on the packing and on the rating plate located on the inside of the frontcasing. Also check that the burner is appropriate for the type of gas to burn.

Make sure that the pipes and fittings used for the gas service are perfectly tight and that there are nogas leaks.

Prior to start-up, the central heating pipes should be flushed to remove any residues that could compromise theoperation of the appliance.

The appliance can be regarded as being electrically safe when it has been connected to an efficient earth

system installed in accordance with the requirements of current safety standards. This fundamental safetyrequirement must be checked and verified. In case of doubt, have the electrical system checked by a qualifiedelectrician. The manufacturer will not be held liable for any damage or injury caused as a result of an ineffectiveor non-existent earth system.

The domestic power supply must be checked by a qualified electrician to ensure that it can support themaximum power absorption of the appliance, as indicated on the appliance data plate (positioned on the insideof the front casing). In particular, make sure that the cable ratings are adequate for the power absorbed.

Do not use adapters; multiple sockets or extension leads to connect the appliance to the mains power supply.

The appliance must be connected to the mains power supply through an appropriate electrical isolator inaccordance with the current wiring regulations.

When using an electrical appliance, a few fundamental rules must be observed: Do not touch the appliance with damp or wet parts of the body or when barefoot

Do not pull on the electric wires

Do not leave the appliance exposed to atmospheric elements (rain, sun, etc,) unless these conditions havebeen expressly provided for.

Do not allow the appliance to be used by children or anyone unfamiliar with its operation.

The user must not replace the power supply cable.

If the cable is damaged in any way, switch off the appliance and have the cable replaced by a suitably qualifiedelectrician.

When the appliance is no longer required for use, switch off the main power supply, to switch allelectrical components off (circulating pump, burner etc.)


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GENERAL INFORMATION

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1.2 Product conformity

RADIANT BRUCIATORI S.p.A. declares that all its products are manufactured to a high specification and incompliance with the relevant standards.

All RADIANT boilers are CE certified and possess technical and functional characteristics that comply with thefollowing standards:

UNI EN 297 for GAS-FIRED CENTRAL HEATING BOILERS TYPE B OF NOMINAL HEAT INPUT 70 kW

EN 483 for GAS-FIRED CENTRAL HEATING BOILERS TYPE C OF NOMINAL HEAT INPUT 70 kW

UNI EN 677 for GAS-FIRED CENTRAL HEATING BOILERS. SPECIFIC REQUIREMENTS FOR CONDENSINGBOILERS WITH NOMINAL HEAT INPUT 70 kW

Gas fired boilers also comply with the following directives:

GAS APPLIANCES DIRECTIVE 90/396 CEE for CE compliance

LOW VOLTAGE DIRECTIVE 73/23 CEE

ELECTROMAGNETIC COMPATIBILITY DIRECTIVE 89/336 CEE

BOILER EFFICIENCY DIRECTIVE 92/42 CEE

The materials used such as copper, brass, stainless steel, etc. form a compact, homogeneous, highly functionalunit that is easy to install and simple to operate. In its simplicity, the wall-mounted appliance is equipped with all theappropriate accessories required to make it a fully independent boiler capable of satisfying domestic hot waterproduction and central heating needs. All boilers are fully inspected and are accompanied by a quality certificate,signed by the inspector, and a guarantee certificate. This manual must be kept in a safe place and mustaccompany the boiler at all t imes.

RADIANT BRUCIATORI S.p.A. will not be held responsible for any misinterpretation of this manualresulting f rom the inaccurate translation of same.

RADIANT BRUCIATORI S.p.A. will not be held responsible for the consequences in the case of non-observance of the instruc tions contained in this manual or in the case where actions not specificallydescribed herein are undertaken.


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GENERAL INFORMATION

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2. TECHNICAL CHARACTERISTICS

2.1 Technical data

Model RMAS 20 ECE Certification n

Appliance Type 0694BN3812

Appliance Category C12 C32 C42 C52 C 62 C82

Heat Input max kW 25.60Heat Input min kW 12Heat Output max kW 23.94Heat Output min kW 10.57Efficiency 100% (full load) % 93.50

Efficiency 30% (partial load) % 91.00

GAS DIRECTIVE 92/42/ECC - Efficiency marking stars 3NOx class (European Standard UNI EN 297 pr A5) class 3Sedbuk band D

Central Heating circuitCentral Heating water temperature setting (min-max) C 30-80Max. heating working temperature C 80Max. working pressure (heating) litres 3Min. working pressure (heating) bar 0.3Expansion vessel capacity bar 8

Domestic Hot Water circuitD.H.W. temperature setting (min-max) C 35-60Max. Hot water working pressure bar 6Min. Hot water working pressure bar 0.5Continuous hot water supply - Dt 30 - mixed water litres /h 690Storage cylinder capacity litres 8

Dimensions (Boiler casing size)Width mm 450Height mm 800Depth mm 320Weight (net) kg 49

Hydraulic connectionsCentral Heating Flow connection 3/4Central heating Return connection 3/4

Cold water mains connection 1/2D. Hot water connection 1/2Gas connection 3/4

Flue systemsHorizontal-Concentric flue system mm 60/100Max. Flue length m 3Twin pipe flue system mm 80/80Max. Flue length (from terminal to terminal) m 30Twin pipe flue system mm 80/125Max. Flue length (from terminal to terminal) m 3

Gas Supply

Natural Gas G 20Inlet pressure mbar 20Gas consumption m

3/h 2.80

Liquid Butane Gas G 30Max. Inlet pressure mbar 30Gas consumption kg/h 2.02

Liquid Propane Gas G 31Max. Inlet pressure mbar 37Gas consumption kg/h 1.99

Electrical s upplyPower supply V/Hz 230/50Electrical power consumption W 155Electrical protection IP X4D


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GENERAL INFORMATION

5

320

130

410

720

800

8582

280286

8582

35

78 70 80 102

73 114

155

45

2.2 Dimensions

LEGEND

HR HEATING RETURN 3/4

HF HEATING FLOW 3/4

G GAS 3/4

CWI COLD WATER INLET 1/2

HWO HOT WATER OUTLET 1/2

S AIR INTAKE / FLUE EXHAUST 80

R AIR INTAKE 80


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GENERAL INFORMATION

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2.3 Internal parts of the boiler

LEGEND

1. AIR PRESSURE SWITCH

2. FAN

3. HEAT EXCHANGER

4. HEATING SAFETY THERMOSTAT

5. EXPANSION VESSEL

6. COMBUSTION CHAMBER

7. IGNITION ELECTRODE

8. MULTIGAS BURNER

9. AUTOMATIC AIR VENT

10. CIRCULATION PUMP

11. HEATING CIRCUIT 3 bar PRESSURERELIEF VALVE

12. ELECTRONIC GAS VALVE

13. DRAIN TAP

14. ROOM SEALED CHAMBER COVER

15. FLUE HOOD

16. STORAGE CYLINDER

17. HEATING SENSOR

18. HOT WATER SENSOR

19. FLAME IONISATION ELECTRODE20. BOILER DRAIN TAP

21. 7 ATE PRESSURE RELIEF VALVE

22. FLAT PLATE TYPE EXCHANGER

23. ELECTRONIC FLOWSWITCH

24. 3-WAY DIVERTER VALVE

25. BY-PASS

26. WATER PRESSURE SWITCH

27. WATER PRESSURE GAUGE

28. FILLING TAP

20

21

15

16

14

18

19

23

2425

27

22

17

12

3

4

5

8

9

7

13

10

1112

26

28

6


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GENERAL INFORMATION

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2.4 Water circuit

LEGEND

1. ROOM SEALED CHAMBER BACK

2. FAN

3. FLUE HOOD ROOM SEALED

4. EXPANSION VESSEL5. HEAT EXCHANGER

6. HEATING SAFETY THERMOSTAT

7. COMBUSTION CHAMBER

8. FLAME IONISATION ELECTRODE

9. IGNITION ELECTRODE

10. MULTIGAS BURNER

11. 7 ATE PRESSURE RELIEF VALVE (HOTWATER)

12. ELECTRONIC GAS VALVE

13. NO RETURN VALVE


15. CIRCULATION PUMP

16. HEATING CIRCUIT 3 bar PRESSURERELIEF VALVE

17. DRAIN TAP

18. FLOW LIMITER


20. ANODE

21. AIR PRESSURE SWITCH

22. HOT WATER SENSOR

23. HEATING SENSOR

24. STORAGE CYLINDER25. BOILER DRAIN TAP

26. FLAT PLATE TYPE EXCHANGER

27. ELECTRONIC FLOWSWITCH

28. 3-WAY DIVERTER VALVE

29. BY-PASS

30. WATER PRESSURE SWITCH

31. WATER PRESSURE GAUGE

32. FILLING TAP

LEGEND


HF HEATING FLOW 3/4

G GAS 3/4



CWI HFHWOHR

1

8

13

7

6

3

18

16

21

23

22

20

19

31

26

32

28

27

29

30

25

24


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GENERAL INFORMATION

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2.5 Circulation pump head/flow graph

III

II

I

Flow l/h

Pump head at min imum speedI

II Pump head at second speed

Pump head at maximum speedIII

Appl iance Loss

Head

(kPa)


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GENERAL INFORMATION

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2.6 DIGITECHprinted circuit board - SM 20019

Technical characteristics

Adjustments poss ible by service personnel only

Standard (30/80C) / reduced (25-40C) central heating temperature

Water hammer prevention function Central Heating timer - (adjustable from 0 to 7,5 minutes)

Central Heating pump overrun timer

Domestic Hot Water pump overrun timer

Minimum Gas pressure setting

Maximum Heating Load

User settings

On/Off

Heating Temperature setting (30-80C) (25-40C)

D.H.W. temperature setting (35-60C)

Summer only mode / Winter only mode / Summer + Winter mode selection

Operation/Functions display

Lock-Out

Normal Water pressure

Water deficiency indicator

Temperature display

When the boiler is switched off at the swi tch on the control panel, the word OFF appears on thedisplay. The D.H.W and central heating frost protection system, nevertheless, remain enabled. If theboiler was previously on, it is switched off and the post-ventilation, pump overrun , circulation pumpand three-way valve inactivity protection functions are enabled.

The remote control, where fitted, remains active and illuminated.

2.7 Control panel

LEGEND

1. ON/OFF SWITCH

2. HEATING TEMPERATURE CONTROL KNOB

3. D.H.W TEMPERATURE CONTROL KNOB.

4. D.H.W TEMPERATURE BUTTON. KEEPPRESSED FOR 5 SECONDS TO DISPLAYOUTSIDE TEMPERATURE (ONLY WITH

OPTIONAL OUTDOOR SENSOR)

5. SERVICE BUTTON.

6. SUMMER, WINTER OR SUMMER/WINTERMODE SELECTION BUTTON.

7. TERMINAL BOARD FOR EXTERNAL WIRING.

8. TEMPERATURE, ERROR CODE ANDOPERATING STATUS DISPLAY 6 754321

8


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INSTALLATION INSTRUCTIONS

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3. INSTALLATION (authorised personnel)

3.1 Reference standard

This appliance meets the requirements of:

- UNI EN 677 for GAS-FIRED CENTRAL HEATING BOILERS. SPECIFIC REQUIREMENTS FOR CONDENSINGBOILERS WITH NOMINAL HEAT INPUT 70 kW

- IPX4D rating for electrical appliances.

- EMC DIRECTIVE 89/336 CEE

- LVD DIRECTIVE 73/23 CEE

- BOILER EFFICIENCY DIRECTIVE 92/42 CEE

Failure to install a gas appliance correctly and in accordance with the above norms could lead to prosecution. It isin the interest of the installer and safety that the law is complied with.

The manufacturers instructions form an integral part of the installation and should be left with the appliance but donot over ride in anyway statutory obligations.

3.2 Boiler room Installation requirements

Please refer to local and national standards in force in the Country of destination of the product. In particular themanufacturer recommends:

The presence of threaded connections on the gas line, require that the room in which the appliance isinstalled is ventilated by means of air intakes.


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B

C

A

3.3 Unpacking

The materials (cardboard) used for packing the appliance are fully recyclable.

It is recommended that the packing material is only removed prior to installing the boiler. Themanufacturer will no t be held responsible for damage caused by incorrect storage of the product.

Packing materials (plastic bags, polystyrene, nails, etc.) must not be left within reach of children, in thatthese items represent a potential hazard.

A. Place the packedappliance on the floor (see fig.1) making sure that the "uparrow is facing down. Removethe staples and open out thefour flaps of the box.

B. Rotate the boiler 90 whilemanually supporting it from

underneathC. Lift the box and remove theprotections. Lift the boiler bygrasping the rear part andproceed with the installation.

STORAGE & HANDLING

Please note that prior toinstallation the Radiant boilersshould be stored in thehorizontal position with no

more than three boilers to astack;Ensure that the boilers arestored in dry conditions and beaware that the carton is a tow-man lift;

Fig. 1


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3.4Installing the boiler

The appliance must be installedexclusively on a flat vertical solid wallcapable of supporting its weight .

The boiler should be fitted within thebuilding unless otherwise protected by asuitable enclosure i.e. garage or outhouse.(the boiler may be fitted inside a cupboard .

If the boiler is sited in an unheatedenclosure then it is recommended to leavethe power on to give frost protection (frostprotection is active even with on/off switchin off position).

If the boiler is installed in a room containinga bath or shower reference must be madeto the relevant requirements.

In order to allow access to the interior of theboiler for maintenance purposes, it is importantthat the necessary clearances indicated infigure 1 are respected. To make the installationeasier, the boiler is supplied with a template toenable the pipe connections to be positionedprior to fixing the appliance to the wall.

To install the boiler, proceed as follows (see fig.2):a. Use a spirit level (of not less than 25 mm

long) to mark a horizontal line on the wallwhere the boiler is to be fitted.

b. Position the top of the template along theline drawn with the level, respecting thedistances indicated. Then mark the centresof the positions of the two wall-plugs oranchors. Finally, mark the positions of thewater and gas pipes.

c. Remove the template and install thedomestic hot and cold water pipes, the gassupply pipe and the central heating pipesusing the fittings supplied with the boiler.

Fix the boiler to the wall using the wall plugs orbracket and connect the pipes.

H

A

X L Y

X Y L H

100041060400

B A B

200 300

DISTANCES IN mm

Fig. 2

Fig. 1


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3.5 Water connections

In order to safeguard the heat exchangerand circulation pump, especially in caseof boiler replacement, it is recommendedthat the system is hot-flushed to removeany impurities (especially oil and grease)from the pipes and radiators.

Make sure that the domestic water andcentral heating pipes are not used toearth the electrical system. The pipes aretotally unsuitable for this purpose.

Isolation Valves must be installed on theheating and D.H.W circuits. This willfacilitate all maintenance and serviceoperations where the boiler needs to bedrained.

To prevent vibration and noise coming fromthe system, do not use pipes of reduceddiameter, short radius elbows or severereductions in the cross sections of the waterpassages.

To facilitate the installation, the boiler issupplied with an hydraulic connection kit (seefig.2).

Domestic hot water circu it

In order to prevent scaling and eventual

damage to the D.H.W heat exchanger, themains water supply must not have a hardnessrating of more than 25 Fr. It is neverthelessadvisable to check the properties of the watersupply and install the appropriate treatmentdevices where necessary.

The cold water supply pressure at the inlet tothe boi ler must be between 0.5 and 6 bar.

In areas with higher water inlet pressure apressure reducing valve must be fitted beforethe boiler.

The frequency of the heat exchanger coil cleaningdepends on the hardness of the mains watersupply and the presence of residual solids orimpurities, which are often present in the case ofa new installation. If the characteristics of themains water supply are such that require it to betreated, then the appropriate treatment devicesmust be installed, while in the case of residues,an in-line filter should be sufficient.

All D.H.W. circuits, connections, fittings, etc.should be fully in accordance with relevantstandards and water supply regulations.

LEGEND


HF HEATING FLOW 3/4

G GAS 3/4



7049 78 80 102 31

HR HWO G CWI HF

130

Fig. 2

Fig. 1

HR

HWO

CWI

HF

G


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14

Central heating circuit

In order to prevent scaling or deposits in the primary heat exchanger, the mains supply water to the heating circuitmust be treated according to the requirements of local standards.

This treatment is indispensable in the case where the circuit is frequently topped-up or when the system is ofteneither partially or fully drained.

The outlet connection of the boiler safety valve must be connected to a discharge trap. The manufacturer will notbe held responsible for flooding caused by the operation of the safety valve in the case of system overpressure.

3.6 Gas Connection

The connection to the gas supply must be carried out by professionally qualified personnel inaccordance with relevant standards:

When connecting the boiler to the gas supply pipe, only use appropriate washers and gas fittings.

The use of hemp, Teflon tape and similar materials is not allowed.

Before installing the boiler, check the follow ing:

The pipe work must have a section appropriate for the flow rates requested and the pipe lengths installed, andmust be fitted with all the safety and control devices provided for by current standards.

The gas supply line must be a minimum of a 22 mm diameter pipe with an uninterrupted supply from meter toboiler and comply with current standards and regulations.

Check the internal and external seals of the gas supply system.

A gas shut-off valve must be installed upstream of the appliance

The gas pipe work must have and bigger or equal section to the one of the boiler.

Before starting up the boiler, make sure that the type of gas corresponds to that for which the appliance hasbeen set-up (see gas type label inside the boiler).

The gas supply pressure must be between the values reported on the rating plate (see gas type label inside theboiler).

Prior to installation, it is good practice to ensure that there are no machining residues on the gas supply pipe.

Conversion of the appliance from natural gas to LPG or vice versa must be carried out by qualified personnel ;


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Remote control connection

Connect the power supply to the terminal board inside the control panel as follows:

a. Switch off the power supply at the main switch.

b. Remove the front case panel of the boiler.

c. Slacken the screws and remove plate A (see fig. 1).d. With the plate removed, connect the wires to the terminal board B as follows:

Connect the earth wire (normally coloured green/yellow) to the terminal marked with the earth symbol .

Connect the neutral wire (normally coloured blue) to the terminal marked with the letter N.

Connect the live wire (normally coloured brown) to the terminal marked with the letter L.

Terminals identified by the letters: Ta Room thermostat

Se Outside temperature sensor

When the wires have been connected, place plate A" back to position.

Ta

L

N

Ta

Se

Se

BA

Fig. 1


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3.8 Flue connections

In order to ensure that the appliance functionscorrectly and efficiently, the flue connection betweenthe boiler and the flue terminal must be made usingoriginal components specifically designed for

condensing boilers.

Traditional flue components cannot be used forconveying exhaust fumes from condensing boilers,nor v ice versa.

To guarantee a correct operation o f the appliance it isimportant to provide for horizontal air intake/flueexhaust pipes a minimum slope of 2% downwards(from the boiler towards the external wall) (see fig.1)For each individual installation, air intake and flueexhaust pipes must be protected with accessories toprevent the penetration of foreign bodies or

atmospheric agents.

Flue Duct connection

Connect the flue to the chimney according to the followingspecification:

Do not allow the exhaust flue to protrude inside thechimney; instead terminate it before it reaches the flue duct.

The exhaust flue must be perpendicular to the opposite wall of the flue duct (fig. 2).

Fig. 2

FLUE ORCHIMNEY

Fig. 1

YES


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Flue type- kit AHorizontal concentric flue kit 60/100 mm adjustable through 360.Discharges exhaust fumes and draws air from atmosphere.

Discharges exhaust gases and draws

combustion air by means of twoconcentric ducts. The external 100duct draws the combustion air whilethe 60 duct discharges the exhaustfumes.The discharge duct can be connecteddirectly to the outside or can beconnected to a suitable combined fluesystem.

MAXIMUM FLUE LENGTH: 3 m.

The maximum flue length (linearequivalent) is obtained by summing

the length of linear pipe and theequivalent lengths of each bendfitted.

The linear equivalent is intended asbeing the total length of the duct fromthe connection with the combustionchamber of the appliance, excludingthe first bend.The linear equivalent of additionalbends is as follows: 60/100 x 90 bend = 0.8 m. 60/100 x 45 bend = 0.5 m.

N.B.: USE ONLY RADIANT TYPE -

APPROVED FLUE SYSTEMS FORDISCHARGING EXHAUST GASES

AND DRAWING COMBUSTION AIR.

85

82

280

286

85

82

112

35

18760

100

166

200


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Flue type - kit BHorizontal twin pipe flue kit 80/80 adjustable through 360.The dual pipe system discharges exhaust fumes into a chimney and draws air from atmosphere.

Discharges exhaust gases and draws

combustion air through two separate 80 ducts.MAXIMUM FLUE LENGTH:80/80: 30 m.

The maximum flue length (linearequivalent) is obtained bysumming the length of linear pipeand the equivalent lengths of eachbend fitted.

The linear equivalent is intended asbeing the total length of the duct(exhaust discharge + air intake) from

the connection with the combustionchamber of the appliance, excludingthe first bend.

The addition of a bend has theeffect of increasing the linearequivalent length of the duct asfollows:80 x 90 bend = 1.5 m.80 x 45 bend = 1.2 m.

N.B.: USE ONLY RADIANT TYPE-APPROVED FLUE SYSTEMS FORDISCHARGING EXHAUST GASES

AND DRAWING COMBUSTION AIR.

80 8

0

85

82

280

286

85

82

35

166

135

151

187

114

200

45

150


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Flue type -kit C2

Vertical concentric flue kit 80/125.Discharges exhaust fumes and draws air directly from high Level.

Discharges exhaust gases and draws combustion air at roof level by means oftwo concentric ducts. The external 125 duct draws the combustion air while

the 80 duct discharges the exhaust fumes.

MAXIMUM FLUE LENGTH: 3 m.

The maximumflue length (linear equivalent) is obtained by summing thelength of linear pipe and the equivalent lengths of each bend f itted.

The linear equivalent is intended as being the total length of the duct from theconnection with the combustion chamber of the appliance, excluding the firstbend.The linear equivalent of additional bends is as follows:80/ 125 x 90 = 0.8 m.80/125 x 45 = 0.5 m.

N.B.: USE ONLY RADIANT TYPE - APPROVED FLUE SYSTEMS FOR

DISCHARGING EXHAUST GASES AND DRAWING COMBUSTION AIR.

125

80

max.3.00mt.

80

125

187

450 320

800

200


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Twin pipe flue kit system

Adjustable flue diaphragms have to be installed on the air intake hole on the top of the boil er.

Installation Instructions: (see fig. 1):

Install the 60mm. aluminium collar onto the flue exhaust vertical connector and fit it on the top of boiler,

central hole (flue exhaust) after having positioned the neoprene washer.

Remove the air intake hole cover;

Clean the seal chamber surface in the area of the air intake hole;

Stick the neoprene washer paying attention to centre holes of the washer with those on the air intake opening;

Position flue diaphragms respecting this order: lower disc first with graduated numbers then the upper disc;

Install the flue connector or other accessory according to the chosen type of twin pipe flue kit system;

Fix the system with self tapping screws provided with the flue kit;

Complete the flue kit installation;

Important! Make the final tightening of screws only after the diaphragms have been set.

Fig. 1

80 VERTICAL CONNECTION

EXHAUST

NEOPRENE SEALING GASKET

ALUMINIUM COLLAR 60


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Diaphragms system setting

kit A- Horizontal-Coaxial Flue Kit System with intake / exhaust pipes 60/100kit C2- Vertical-Coaxial Flue Kit System with intake / exhaust pipes 80/125

kit B- Separate air intake/exhaust fumes discharge system through 360.

MAXIMUM FLUE

LENGTH(linear length)

Model

RMAS 20 E

from0.5 to1 m. 1 2 4 5

from1 to 2 m. 1 2 3 4 5

from2 to 3 m.1 2 3 4 5

Remove tags

MAXIMUM FLUE LENGTH 3 m.

MAXIMUM FLUELENGTH

(linear length)

Model

RMAS 20 E

from 1 to 8m. 1 2 3

from 8 to 18m. 1 2 3

from 18 to 30m. 1 2 3

MAXIMUM FLUE LENGTH 30 m.

UPPER DISK

ADJUSTMENT

NUMBERS FOR21

INDICATOR

3

LOWER DISK

3

INDICATOR

52

1 4FOR ADJUSTMENT

DISCLOWER

DISCUPPER

NUMBERS


28/54

REGULATION INSTRUCTIONS

24

4. COMMISSIONING THE APPLIANCE

4.1 General warnings

The following operations must be carried out by professionally qualified personnel authorised byRadiant Bruciatori s.p.a.

The boiler leaves the factory pre-set and tested for burning either natural Gas or LPG. Nevertheless,when starting the boiler for the first time, make sure that the information on the rating platecorresponds to the type of gas being supplied to the boiler.

Once the system has been filled and the necessary adjustments made, remember to tighten thescrews of the gas valve test point and make sure that there are no gas leaks from the test point andfrom any pipe fitt ings upstream of the gas valve.

Preliminary operations

Switching the boiler on for the first time means checking that the installation, regulation and operation of theappliance are correct :

If the gas supply system is newly installed, then the air present in the pipes can cause the boiler not to light atthe first attempt. A number of attempts may be required in order to light the boiler;

Check that the data on the data plate corresponds to that of the mains supply networks (gas, electricity, water));

Check that the power supply voltage to the boiler complies with the data plate (230 V 50 Hz) and that the live,neutral and earth wires are connected properly. Also make sure that the earth connection is sound;

Check the seals on the gas supply pipe from the mains, and make sure that the meter does not register anyflow of gas;

Open the gas valve to the boiler and check that there are no leaks from the fittings upstream of the boiler (theburner gas connection is checked with the boiler in operation)

Check that the gas supply is correctly sized for the flow rate required by the boiler and that it is fitted with all the

safety and control devices as lay down by current regulations

Check that the supply of combustion air and exhaust and condensate discharge systems are functioningcorrectly and in line with current law and national and local standards;

Check for the presence of permanent aeration/ventilation openings as required by current law for the type ofappliances installed.

Check that the flue duct and its connections to the terminal/chimney comply with the requirements of currentlaw and national and local standards for the type of appliances installed.

Make sure that any central heating shut-off valves are open.

Check that there are no exhaust fumes discharged into the system itself.

Check that there are no flammable materials or liquids in the immediate vicinity of the boiler;


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25

4.2 Fill ing the system

Check the properties of the water supply andinstall the appropriate treatment devices ifthe mains water has a hardness rating more

than 17.5 Ck inorder to prevent scaling and

eventual damage to the D.H.W heatexchanger.

Use only clean tap water to fil l the system.

Once the water pipes have been connected, closethe gas feed valve and fill the system as follows:

Check that the circulation pump runs freely;

Check that the plug of the air vent valve has beenslackened slightly to allow air to escape from thesystem (fig.1);

Open the main domestic water supply valve;

Open the filling tap R(fig. 2);

Unscrew the plug on the pump to remove anytrapped air, check that the pump is free then re-tighten it when water starts to flow out;

Open the air vents on the radiators and monitorthe air evacuation process. When water starts toflow out of the radiators, close the air vents;

Use the pressure gauge M (fig. 2) to check thatthe system pressure reaches 1 bar and that thecode H2O does NOT appear on the control panel

display (see 2.7 section Control Panel);

If, after the above operations, there is a reductionin the pressure, re-open the filling tap Runtil thepressure gauge reads 1 bar and that the codeH2O disappears on the control panel display;

On completion, make sure that the filling tapR is perfectly c losed.

Emptying the central heating system

Whenever it is necessary to empty the system,proceed as follows: turn off the main power supply switch; wait for the boiler to cool down; turn the system drain tap RS (see fig. 2) and use a

container to collect the water that runs out;

Emptying the domestic hot water system

Whenever there is danger of freezing or any otheroccurrence, the hot water system could be emptied inthe following way: Shut off the water at the mains; Open all hot and cold water taps; Empty from the lowest point (where possible).

PUMP PLUG

PUMP

AIR VENT VALVE PLUG

AIR VENT VALVE

R MFig. 2

Fig. 1


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26

4.3 Flushing the system

Failure to flush and add inhibitor to the system will invalidate the appliance working.Al l systems must be thoroughly drained and flushed out using addit ives corrosion inhibitors andflushing agents/descalers .

To flush out the primary side of this unit.

a. Fill the boiler as per the filling instructions.b. Using a drain off cock on the lowest point of the system allow the water to drain from the system and boiler.c. In order to flush the system correctly turn off all radiators open the filling loop and drain cock simultaneously

and allow the water to flow through the boiler.d. Open each individual radiator allowing water to flow through then turn that radiator off and repeat for all

radiators on the system.e. Turn off the filling loop and close the drain cock open all radiators and open the filling to fill the system.f. Continue to fill the system until the pressure gauge reaches 1 bar.

To flush out domestic hot water circuit.

a. Open all hot water outlets.b. Turn on inlet group supply so water enters the boiler; leave to fill until water is released from the hot water

outlets. Turn off all hot water outlets.c. Connect a hosepipe to the cylinder drain cock and open the drain cock.d. Allow water to flow through the boiler and out of the drain cock.e. Turn off water supply, disconnect the hosepipe, close the drain cock and refill the boiler.


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27

4.4 Starting up the boi ler

Once the system has been filled, proceed as follows:

Check that the exhaust flue is free ofobstructions and correctly connected to theboiler;

Switch on the power supply to the boiler;

Open the gas feed valve;

Place switch 1 in the ON position (see 2.7Control Panel), after a few seconds thecirculating pump will start to run;

Use button 6to set SUMMER/WINTER function.

The symbols will light up (fixed light) toindicate that the boiler is working;

The automatic ignition system will then lightthe burner. This operation is repeated for 3times (every 20 seconds) in case of the boilershould fail to ignite. It may however benecessary to repeat the operation in order toeliminate all the air from the pipes. To repeat theoperation, wait approximately three minutesbefore re-attempting to light the boiler. To resetthe boiler switch off switch 1 (fig. 1) and switch itback on again and repeat the lighting procedure;

With the boiler ignited, if the system still emitsnoises, the operations must be repeated until allthe air has been removed;

Check the pressure in the system. If thepressure has fallen, re-open the filling tap untilthe code H2Odisappears on the display andthe pressure gauge reads 1 bar on completion,close the filling tap.

set ON/OFF switch 1 in OFF position, insert agauge into the pressure point no. 2 (fig. 2). TurnON the boiler and check the minimum andmaximum gas pressure setting in accordancewith values stated on the gas data plate (tocheck maximum gas pressure value, turn ON ahot water tap and check that the maximumpressure is equal to that stated on the gas data

plate; to check the minimum gas pressure, closethe hot water tap, and select WINTER mode, thepressure gauge will show the minimum gaspressure value for 10 seconds. If the pressurevalues are not the same as those stated on thegas data plate, calibrate pressure again;

once the calibration procedure has beencompleted, unplug the mains lead or turn off themains switch, close the gas feed valve andremove the gauge from the pressure point;tighten the screw making sure there are no gasleaks;

after carrying out this operation, return the panelto its correct position and put the front casingback;

Fig. 1

8

1 2 3 4 5 76

321

KEY

1. GAS ADJUSTMENT SCREW

2. GAS PRESSURE POINT - OUTLET

3. GAS PRESSURE POINT INLET

Fig. 2


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28

5. REGULATING THE BOILER

5.1 Parameter table

PARAMETER N TYPE OF OPERATIONPARAMETER

VALUEFUNCTION

1 Selects the type of boiler000102

InstantaneousBoiler with storage tank

B. w/storage tank Comfort (+7C)

2 Selects the type of gas0001

Natural gasLpg

3Sets the central heating

temperature0001

Standard (30-80C)Reduced (25-40C )

41Selects pump mode during

heating phase

00

01

Standard ( 3 pump overrun)Permanent (pump runs

continuously)

5 Water hammer prevention0001

OffOn

6 Central heating timer00-90 (default =

36)

Delays the heating restart toprevent frequent On/Offs,

Expressed in steps of 5 sec(factory set at 36 x 5 = 180)

7Central heating pump

overrun timer00-90 (default =

36)

The overrun timer can be modified.Expressed in steps of 5 sec(factory set at 36 x 5 = 180)

8 D.H.W pump overrun timer00-90 (default =

18)

The overrun timer can be modified.Expressed in steps of 5 sec(factory set at 18 x 5 = 90)

9Minimum gas pressure

setting00-70 Factory set

10Minimum central heating

output setting00-80 Factory set

11Maximum gas pressure and

maximum central heatingoutput setting

Min gas 99 Default = 99

12 Ignition sequence setting 00-99 Default = 50

13 D.H.W priority function(2 min delay on dhwfunction)

0001

OffOn

14 Not used

152Zone management board

activation0001

OffOn

163 Telephone control activation0001

OffOn

NOTES:

1 - Activate only for heating only boilers.

2 - If the heating system has more than one zone, an additional interface board (optional extra) mustbe installed on the circuit board and parameter 15 set at 01.

3 - To install the telephone control, use non-polarised conductors connected to contact TA of theterminal board in parallel with the remote control if fitted. Set the parameter 16 at 01.


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29

5.2 Setting the parameters

To modify the preset values of the parameters reported in the previous table, open the parametersettings menu as follows:

1. Place the On/Off switch in the OFF position.

2. Activate the On/Off switch while keepingbuttons + and - pressed. Wait for P 00 toappear on the display.

3. Release buttons + and -.

4. Keep button S pressed and use button + toselect the parameter to modify.

5. Release button S, then re-press and releaseit. The display will indicate the value of the

parameter to modify.

Adjust the value of the parameter using theprocedure described in the following pages.

P 00

S

S

S

S

OFF

P 00

P 01


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30

To enter the parameters menu, follow the previously described procedure (steps 1-5).

PARAMETER 1TYPE OF BOILER

6. Use buttons + and - to modify the value of theparameter:00 = Instantaneous boiler01 = Storage boiler;02 = Storage boiler comfort (+7C).

7. Press and release button S to confirm. The parameternumber (1) will appear on the display.

8. Switch off the appliance and switch it back on again torender the new parameter operative.

PARAMETER 2-GAS SUPPLY

6. Use buttons + and - to modify the value of theparameter:00 = natural gas01 = lpg

7. Press and release button S to confirm. The parameter

number (2) will appear on the display.8. Switch off the appliance and switch it back on again torender the new parameter operative.

PARAMETER 3CENTRAL HEATING TEMPERATURE

6. Use buttons + and - to modify the value of the

parameter:00 = standard (30 80C)01 = reduced (25 40 C) for under-floor heating



P 01

S

S

S

S

S

S

00

01

P 02

01

P 03


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31

PARAMETER 4CENTRAL HEATING PUMP

6. Use buttons + and - to modify the value of theparameter:00 = standard (3 overrun)

01 = permanent (always running)7. Press and release button S to confirm. The parameter

number (4) will appear on the display.8. Switch off the appliance and switch it back on again torender the new parameter operative.

PARAMETER 5WATER HAMMER PREVENTION

6. Use buttons + and - to modify the value of theparameter:00 = off01 = on (default = 2)



PARAMETER 6CENTRAL HEATING TIMER

6. Use buttons + and - to modify the value of theparameter within the prescribed limits00 = 0 x 5 = 090 = 90 x 5 = 450 (7.5 min)

The default value is 36 = 180 = 3 min

7. Press and release button S to confirm. The parameternumber (6) will appear on the display.8. Switch off the appliance and switch it back on again torender the new parameter operative.

P 04

S

S

S

S

S

S

00

01

P 05

36

P 06


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32

PARAMETER 7 CENTRAL HEATING PUMP OVERRUNTIMER

6. Use buttons + and - to modify the value of theparameter within the prescribed limits00 = 0 x 5 = 0

90 = 90 x 5 = 450 (7.5 min)The default value is 36 = 180 = 3 min7. Press and release button S to confirm. The

parameter number (7) will appear on the display.8. Switch off the appliance and switch it back on againto render the new parameter operative.

PARAMETER 8D.H.WPUMP OVERRUN TIMER

6. Use buttons + and - to modify the value of theparameter within the prescribed limits00 = 0 x 5 = 090 = 90 x 5 = 450 (7.5 min)

The default value is 18 = 90 = 1.5 min7. Press and release button S to confirm. The

parameter number (8) will appear on the display.8. Switch off the appliance and switch it back on againto render the new parameter operative.

5.3 Regulating the gas pressure

PARAMETER 9MINIMUM D.H.WGAS PRESSURE

All boilers are factory set with the minimum value at

1.7/1.8 mbar.

If the valve has been replaced, proceed as follows:

6. Use a flat screwdriver to adjust screw D (fig. 1 page38);7. Rotate the screw (D) clockwise to fully tighten it.8. To set the minimum pressure, rotate the screw (D)counter clockwise for three complete turns.

P 07

S

S

S

S

36

18

P 08


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33

PARAMETER 10MINIMUM CENTRAL HEATING OUTPUT

6. Use buttons + and - to modify the value of the parameter. Therange of settings is 00 - 80 .

7. Press and release button S to confirm. The parameter number (10)will appear on the display.

8. Switch off the appliance and switch it back on again to render thenew parameter operative.

PARAMETER 11 MAXIMUM D.H.W AND CENTRAL HEATING GASPRESSURE

6. Before switching on the boiler to adjust the setting, insert a pressuregauge in the pressure take-off point (B) on the gas valve.

7. Open the parameters menu and select parameter 11. Adjust thevalue of the parameter to 99. Press button S and release it toconfirm. The value 11 will appear on the display.

8. Switch the boiler off and then on again. Press button Press button Sfor 7 seconds until the number 7 flashes on the display (chimneysweep function). In this way, the boiler will run at maximum heatingpower for 15 minutes. The pressure gauge will indicate the gaspressure. If this pressure value is different to that on the rating plate ofthe boiler (see setting the pressure) adjust the gas regulator as follows:

a. remove aluminium plugA(fig. 1) and use a screwdriver to therotate the plastic screw to regulate the maximum D.H.W gaspressure.

b. replace aluminium plug A on the gas valve and switch off theboiler. Make sure that the pressure gauge is removed and thatthere are no gas leaks.

9. Switch the appliance off and then back on again.10. To set the maximum heating power, first make sure that there areno D.H.W taps open. Then open the parameters menu and adjustparameter 11 from 99 to the required value according to the Pressure-Power correlation diagrams.

It is good practice to regulate the maximum power of the appliancein line with the energy requirements of the system. If possible, do

not set this value at more than 80% of the adjustment range.

66

24

S

S

S

S

P 10

P 11

Valvola gas VK 4105G

Fig. 1

D

B

10

20

30

40

A

MANOM ETRO

C


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34

PARAMETER 12-IGNITION SEQUENCE SETTING

6. Use buttons + and - to modify the value of the parameterwithin the prescribed limits

00 = minimum pressure set at the gas valve.99 = maximum allowed pressure of the model installed.

The default value is 50.7. Press and release button S to confirm. The parameter number

(12) will appear on the display.8. Switch off the appliance and switch it back on again to renderthe new parameter operative.

PARAMETER 13D.H.W PRIORITY

It keeps 3 way valve in D.H.W. production position, for a periodequals to D.H.W. pump overrun, so that plate exchanger is kepthot.6. Use buttons + and - to modify the value of the parameter:

00 = off01 = on (default = 120)

7. Press and release button S to confirm. The parameter number(13) will appear on the display.

8. Switch off the appliance and switch it back on again to renderthe new parameter operative.

PARAMETER 15ZONED SYSTEM

6. If the system is fitted with zone valves, set the parameter at01. If a remote control is installed, an extra interface boardmust be installed to control the zone valves. Then set theparameter at 01.


8. Switch off the appliance and switch it back on again to renderthe new parameter operative.

PARAMETER 16TELEPHONE CONTROL

6. If a telephone interface is installed, enable the board by settingparameter 16 at 01;


8. Switch off the appliance and switch it back on again to renderthe new parameter operative.N.B.: The connection of the telephone interface to contact TA of

the terminal board must be wired in parallel with the remotecontrol using two non-polarised conductors.S

S

S

S

01

S

S

00

00

50

S

S

P 12

P 13

P 15

P 16


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35

5.4 Gas Data

Technical data tables

Natural Gas

G20

Liquid Butane

Gas G30

Liquid Propane

Gas G31Lower Wobbe index (15C; 1013 mbar) MJ/Nm3 45.67 80.58 70.69

Nominal supply pressure mbar 20 30 37

Main burner jets: n x (mm) 11 x 1.30 11 x 0.78 11 x 0.78

Consumption (15C; 1013 mbar) m3/h 2.80 - -

Consumption (15C; 1013 mbar) kg/h - 2.08 1.99

Gas pressure adjustment table

Heating output maximum pressure diagram

(G20 - G30/31)

L.P.G. (G30/G31)

Natural Gas

0

2

4

6

810

12

14

16

18

20

22

24

26

28

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

Gas pr ess ure in m bar

OutputinkW

Natural GasG20

Liquid Bu taneGas G30

Liquid PropaneGas G31

min max min max min max

Boiler Power Rating mbar 2.3 12.1 5 26.5 8 34.6


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MAINTENANCE INSTRUCTIONS

36

5.5 Converting the boiler to a dif ferent gas type

The conversion of a boiler from burning natural gas to LPG, orvice versa, must be carried out exclusively by professionallyqualified personnel, registered in accordance with currentlegislation.

Check that the gas supply pipe is sui table for the new fuel type.

Conversion is performed as follows (see fig.1):

1. turn off the main power switch;

2. close the gas cock;

3. substitute the jets on the main burner as follows: undo the gas pipe (5 fig.1) from the burner manifold using asize 24 spanner, separate the burner manifold (6) from the burner ramps (7) by undoing the 2 screw (11);

4. fit new jets to 8 (see Technical data tables 5.4 , Main burner jets) the burner suitable for the type of gas theboiler will run on using a no. 7 spanner. The jets must be fitted with new gaskets;

5. reassemble the entire burner unit. Use the soapy water method to check for gas leaks each time gasconnections are dismantled and reassembled;

6. select the new gas type by changing parameter no.2 (see Parameters table 5.1);

7. to convert the appliance from L.P.G. to Natural Gas proceed with the min. and max. gas pressure adjustment;

8. to convert the appliance from Natural Gas to L.P.G. proceed as follows: screw the gas valve stabiliser 2completely and measure the gas valve inlet pressure 3 with burner ON; adjust the system pressure regulatoraccording to the Gas Data Table 5.4 (Nominal Supply pressure). In case of G 30 G31 mix, adjust the inletpressure according to G31 pressure data.

9. replace the gas setting plate that indicates the type of gas and nominal pressure for the boiler. Whenconverting the boiler to work with a different type of gas, remove the existing plate and replace it with the newone supplied in the conversion kit.

1

43

5

2

9 10

7

6

7

11

86

5

8

LEGEND:

1. GAS VALVE

2. STABILISER

3. INLET PRESSURE POINT

4. OUTLET PRESSURE POINT

5. GAS PIPE

6. BURNER MANIFOLD

7. RAMP GAS BURNER8. INJECTORS

9. IGNITION ELECTRODES

10. FLAME IONISATION ELECTRODES

11. SCREW


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37

6. MAINTENANCE (authorised personnel)

6.1 General Warnings

Al l maintenance operations must be carried out by professional ly quali fied personnel, authorised byRadiant Bruciatori Spa.

The frequency of boiler maintenance must comply with current law and, nevertheless, should becarried out once a year.

In order to guarantee the long life of the appliance and in accordance with the current gas safetyregulations, only use original spare parts

Before carrying out any type of maintenance operation, disconnect the appliance from the mainselectric ity supply and close the gas valve.

6.2 Boiler inspection

In order to ensure that the boiler operates efficiently and safely, it is recommended that the appliance is inspectedby a suitably competent technician at least once a year.The following operations should be carried out annually

Check the condition of the gas seals and replace where necessary.

Check the condition of the water seals and replace where necessary.

Visually inspect the condition of the combustion chamber and flame.

When required, check that the combustion is correctly regulated and if necessary proceed in line with sectionCommissioning the boiler.

Remove and clean any oxidation from the burner.

Check that the seal of the room-sealed chamber is undamaged and positioned correctly.

Check the primary heat exchanger and clean if necessary.

Check the maximum and minimum modulation pressures and the modulation itself.

Check the condition and operation of the ignition and gas safety systems. If necessary, remove and clean thescaling from the ignition and flame detection electrodes, paying particular attention to replace them at the correctdistance from the burner.

Check the heating safety systems: temperature limit safety thermostat, pressure limit safety device.

Check the pre-fill pressure of the expansion vessel (see expansion vessel data plate).

Check the presence of air intake/permanent ventilation openings correctly sized according to the boiler installedand in respect with current law.

For safety reasons, periodically check the integrity and operation of the flue gas exhaust system.

Check that the connection to the mains electricity supply complies with that reported in the boilers instructionmanual.

Check the electrical connections inside the control panel.

Check the D.H.W flow rate and temperature.


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38

6.3 Accessing the boiler

All maintenance operations require one ormore of the boiler casing panels to beremoved.

The side panels can only be removed afterthe front panel has been removed.

Front panel:

Remove the fixing screws at the loweredge of the front panel.

Grasp the lower part of the panel andpull it outwards and then up (fig. 1).

Left and right side panel:

Remove the fixing screws at the frontand lower edge of the side panel to

remove (fig. 2). Grasp the bottom of the panel, move it

sideways and then upwards to removeit.

To access the electrical connections ofthe control panel, proceed as follows:

Remove the front panel (see fig. 1 andfig. 2).

Grasp the left and right control panel

support brackets and pull themoutwards, at the same time rotating thepanel downwards.

Unscrew the four fixing screws andremove the panel back piece.

Fig. 1

2

2

3

1

1

Fig. 2


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39

6.4 Draining the system

central heating system

If the need arises to drain the system, this can bedone as follows:

Switch the system to WINTER mode and ignitethe boiler.

Switch off the power supply to the boiler.

Wait for the boiler to cool down.

Connect a hosepipe to the system drain point andlocate the other end of the hose in a suitabledrainage system.

Open the system drain valve (see fig. 1).

Open the air vents on the radiators, starting withthe highest and moving down the system to thelowest.

When the system has been drained, close theradiator breather valves and the drain valve.

If only the boiler needs to be drained, close the flow/return isolating valves on the heating circuit andopen the drain valve located at the bottom of the boiler on the pump manifold (see fig. 1);

draining the domestic hot water system

If there is a danger of freezing, the domestic hot water system should be drained. This can be done as follows:

Close the mains water supply valve.

Open all the hot and cold water taps.

On completion, close all the previously opened taps.

Fig. 1


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40

M7

M5 M9

M4M6M2

black

black

orange

M1M10

Telephone control

Remote "Open therm"

orange

brow

n

orange

orange

VK4105G

CVI-M

brown

blue

brown

blue

red

blu

e

bro

wn

bla

ck

blu

e

bro

wn

brown

blue

b

lue

b

rown

white-black

black

black

red-black b

lack

brown

blue

black

orange

remote conzone valve

Zone valve management +option remote controller board

Storagecylindertimer

(option)

PRINTED CIRCUIT BOARD DIGITECH - SM20019

COD. 76677LA

blue

Zone valvecontact closure

6.5 Wiring diagrams

Electrical connections

Key

IG: Main SwitchPA: Air Pressure switchTS: Safety thermostatSR: Heating sensorSS: DHW sensorEV: FanSE: Outside temperature sensor(optional)ER: Ionisation electrodeEA: Ignition electrodeTRA: Ignition transformer

VD: 3-way valveC: Circulating pumpMF: Flowswitch microPACQ:Water pressure switch


45/54


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42

REMOTE "OPEN THERM"

A

Se

S

e

Ta

N

L

B

Ta

Outsidetemperaturesensor (option)

Ta

B

L

N

Ta

Se

Se

A

REMOTE "OPEN THERM"

Telephone control

Connecting the remote control ler and the outside temperature sensor (option)

Connect the wires to the terminal board

inside the instrument panel as follows:

a. switch off the power supply at the main

switch.

b. remove the front case panel of theboiler.

c. slacken the screws and remove plate A

(see fig.1).

d. remove jumper TA-TA from the terminal

board B;

e. connect the remote controller wires.

When the wires have been connected,

place plate A" back to position and then

the front case panel.

Connecting the remote controller and the telephone control (option)

Connect the wires to the terminal board inside the instrument panel as follows:

a. switch off the power supply at the main

switch.

b. remove the front case panel of the boiler.

c. slacken the screws and remove plate A

(see fig.1).

d. remove jumper TA-TA from the terminal

board B;

e. connect the remote controller and the

telephone control wires;

f. Active the telephone control through the

parameter no.16 (chapter 5.1

Parameters Table)

When the wires have been connected, place

plate A" back to position and then the front

case panel.

Fig. 2

Fig. 1


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43

Outside

temperature

sensor(option)

Terminalblock

REMOTE"OPEN

THERM"

Zonevalv

emanagement+

optionrem

otecontrollerboard

Remote control and zone valves wiring

For the installation of a zone valve p.c.b., it is necessary to access the main p.c.b. for electrical connection (seechapter 6.3 Accessing the boiler ) and to activate the parameter no. 16 (see chapter 5.1 parameters table).


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44

REMOTE"OPEN

THERM"

Telephone

control

Term

inalblock

Outside

temperature

sensor(option)

Zonevalvemanagement+

optionremotecontrollerboard

Remote control, zone valves and telephone control wirings


49/54


45

Regulating the Flow temperature in accordance with the outdoor temperature

The outdoor sensor has to be connected directly to circuit board SM 20019. The sensor can thus be managed inone of two ways:

In case of remote controller + outdoor temperature sensor installation, the climatic compensation curve is setby the remote itself (see remote control installation and operating manual).

In case of outdoor temperature sensor only installation, the climatic compensation curve is set using the centralheating control knob. As the knob (fig. 2) is rotated, the numbers corresponding to the curve shown in figure 1are displayed.

The factors governing the correction is reported in figure 1.

The selection of the compensation curve is determined by the maximum delivery temperature Tm and the minimumoutdoor temperature Te.

N.B.The y-axis values of the delivery temperature Tm refer to standard 80-30 C appliances or 40-25 C floor-mounted appliances. The type of appliance can be programmed using parameter 3 (see 5.1 Parameterprogramming).

13

OUTDOOR SENSOR

DELIVERY TEMPERATURE CORRECTION AS A FUNCTION OF OUTSIDE

TEMPERATURE WITH RESPECT TO THE POSITION OF THE HEATINGTEMPERATURE CONTROL SET BY THE USER

TM-MAX/MIN = delivery temperature range selected

70

35

MIN25

27 26

30

30

35

45

40

50

60

55

65

192425 23 2122 20 1618 17 15 14

Tm

MAX40 80

75

Te = Outdoor temperature Tm = delivery temperature

-121012 11 89 7 56 4 23 1 -6-3-10 -2 -4 -5 -9-7 -8 -10-11

89 7 6 5

0

Te (C)

-15-13-14

1

2

3

4

Fig. 2

Fig. 1


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6.6 TroubleshootingERRORCODE

PROBLEM POSSIBLE CAUSE

REMEDY

E01 NO FLAME

WITH NO IGNITION

a. NO GAS.b. IGNITION ELECTRODE BROKEN OR EARTHED.

c. GAS VALVE MALFUNCTION

d. MECHANICAL MINIMUM ADJUSTMENT (ON GASVALVE) SET TOO LOW OR SLOW IGNITION

ADJUSTMENT SET TOO LOW.

e. GAS VALVE INLET PRESSURE TOO HIGH (FORLPG BOILERS ONLY );

WITH IGNITION

f. POWER SUPPLY LIVE AND NEUTRAL WIRESINVERTED.

g. IONISATION ELECTRODE MALFUNCTION.h. IONISATION ELECTRODE CABLE

DISCONNECTED.

a. CHECK MAINS SUPPLY.b. REPLACE PART.

c. REPLACE PART

d. REGULATE MECHANICALMINIMUM OR SLOW IGNITION.

e. CHECK THE MAXIMUMPRESSURE SETTING.

f. CONNECT THE POWERSUPPLY WIRES CORRECTLY.

g. REPLACE PART.h. CONNECT THE IONISATION

ELECTRODE WIRE.

E02SAFETYTHERMOSTATTRIPPED (95C)

i. THERMOSTAT MALFUNCTION OR OUT OFCALIBRATION.

j. THERMOSTAT CABLE DISCONNECTED.

i. REPLACE PART.j. CHECK THE WIRING ;

H20NO WATER INTHE SYSTEM

k. INSUFFICIENT WATER PRESSURE IN THESYSTEM (STOPS AT 0.3 BAR).

l. WATER PRESSURE SWITCH CABLEDISCONNECTED.

m. WATER PRESSURE SWITCH MALFUNCTION.

k. FILL THE SYSTEM;

l. CHECK THE WIRING;

m. REPLACE PART;

E05HEATINGSENSOR

n. SENSOR MALFUNCTION OR OUT OFCALIBRATION (RESISTANCE VALUE 10 kOhmsAT 25 C).

o. SENSOR CABLE DISCONNECTED OR WET.

n. REPLACE PART;

o. CHECK THE ELECTRICALCONNECTION;

E12

D.H.WSTORAGECYLINDERSENSOR

p. SENSOR MALFUNCTION OR INCORRECT(RESISTANCE VALUE 10 kOhms AT 25 C).

q. SENSOR CABLE DISCONNECTED OR WET.

p. REPLACE PART;

q. CHECK THE ELECTRICALCONNECTION ;

E14AIR PRESSURESWITCH

r. SWITCH OUT OF ORDERs. INLET OR OUTLET FLUE GAS DUCTS

OBSTRUCTED

t. SWITCH CABLE NOT STABLE

r. REPLACE PARTs. CHECK FLUE GAS DUCTS

t. CHECK CABLE

E22

PARAMETERPROGRAMMING

REQUEST

u. LOSS OF MICROPROCESSOR MEMORY. u. REPROGRAM PARAMETERS;

E35FLAMEDETECTIONMALFUNCTION

v. IONISATION ELECTRODE MALFUNCTIONw. IONISATION ELECTRODE CABLE MALFUNCTIONx. PRINTED CIRCUIT BOARD MALFUNCTION

v. CLEAN IT OR REPLACE PARTw. REPLACE PARTx. REPLACE PART


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6.7 Diagnostics

Error codes:

E01 Ionisation Lock OutE02 Safety Thermostat Tripped

H2O Low Water Pressure AlarmE05 Heating Sensor MalfunctionE12 D.H.W Storage Cylinder SensorMalfunctionE14 Air Pressure Switch TrippedE22 Parameter Programming RequestE35 Flame Detection Malfunction

Function codes :

Code Function Descrip tion

07Flue test function active

(Chimney-Sweeper)

Pressing the service button for 7 secondsactivates the Flue test function. Pressing theboiler off button deactivates the function.The Flue test function operates the boiler at themaximum heating pressure for 15 minuteswithout any modulation. The function is usefulfor combustion testing.

08Frost Protection

Central heating circuit

The function is activated when the heating

sensor senses a temperature of 5 C. Theboiler operates at minimum gas pressure withthe 3-way diverter valve in the winter position.The function is deactivated when thetemperature detected by the sensor reaches30C.

13Frost Protection

D.H.W. circuit for storageboilers

The function is activated when the sensorsenses a temperature of 4C. The boileroperates at minimum gas pressure. The 3-waydiverter valve closes in the summer positionand heats the D.H.W. circuit. The function isdeactivated when the D.H.W. storage cylindersensor detects a temperature of 8C or whenheating sensor detect a temperature in theheating circuit of 30C.

28 Legionella Prevention Function

Function active for storage boilers only. Itcomes into operation every 7 days.It brings the hot water temperature of thestorage cylinder up to 60C whatevertemperature value is set for hot water.

31 Incompatible Remote ControlFunction active when the remote controlconnected is not compatible with the printedcircuit board .


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6.8 Parts List

Main components

CODE DESCRIPTION

20049LA CYLINDER 8 LT. STAINLESS STEEL

20076LA 14-PLATE D.H.W HEAT EXCHANGER

21035LA GAS BURNER 11 R. 1,30 NATURAL GAS

24052LA PUMP UPS 15-50

35007LA IGNITION ELECTRODE

35009LA IONISATION ELECTRODE

36074LA GAS VALVE

37016LA EXHAUST FAN

58023LP MAIN HEAT EXCHANGER

59001LA AIR PRESSURE SWITCH

59015LA WATER PRESSURE SWITCH

73507LA 1/8" IMMERSED WHITE SENSOR

73516LA HEATING SENSOR

76677LA PRINTED CIRCUIT BOARD BMBC w/DISPLAY DIGITECH - SM20019

86014LA WATER PRESSURE GAUGE

86027LA SAFETY THERMOSTAT 90 C

88018LA TRANSFORMER 10Hz 230VAC

95019LA EXPANSION VESSEL 8 L

96012LA AUTOMATIC AIR VENT VALVE 3/8"

96018LA NO-RETURN VALVE

96032LA DIVERTER VALVE

96037LA SAFETY VALVE 1/2" 7 bar

96058LA 3 BAR PRESSURE RELIEF VALVE -HTG CIRC.


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MULTIPLEX unit

26134LA D.H.W. OUTLET CONNECTION INSTANTANEOUS MOD.

28253LA COLD WATER HEATING FLOW CONNECTION

26127LA PUMP MANIFOLD

33030LA SENSOR HOLDER PUMP CONNECTION BODY M.PLEX

59015LA WATER PRESSURE SWITCH PC 5411 - BRASS

73507LA D.H.W-HEATING SENSOR 1/8" WHITE

86014LA WATER PRESSURE GAUGE M3A-ABS 40 0-4 PB120417

96039LA 3 BAR PRESSURE RELIEF VALVE

20046LA PLATE EXCHANGER 24 PLATES

41016LA FLOWSWITCH FILTER

43002LA WASHER D.18.5x10.2x2 1/2" AFM34

43003LA WASHER D.15x8x2 3/8" AFM34

43135LA 3 WAY VALVE WASHER

43139LA PLATE EXCHANGER O-RING

43145LA 3 WAY VALVE MOTOR O-RING MULTIPLEX

43150LA SEAL O-RING

43151LA BY PASS O-RING43159LA WASHER EPDM 80 SH M.PLEX 16x24x2,5

43248LA OR 4081 EPDM Di18,68x3,53 - OR4081E

43276LA OR EPDM 17,00x4 - OR17,00x4

54022LA FIXING CLIP

54032LA FIXING CLIP STAINLESS STEEL

61004LP FLOWSWITCH PISTON

64066LA FLOWSWITCH CAP MULTIPLEX

64068LA 3 WAY VALVE UPPER SECTION FOR ISTANTANEOUS MODELS

64075LA BY-PASS MULTIPLEX ZYTEL 70G30

64106LA BY-PASS BUSH IN NYLON 66

64123LA PUMP MANIFOLD CONNECTION BEND

64124LA PUMP CONNECTION SECTION M.PLEX 2006

64126LA 3 WAY VALVE BOTTOM SECTION M.PLEX 2006 ZYTEL

64127LA FLOWSWITCH GROUP FOR ISTANTANEOUS

67038LA FLOW LIMITER89116NA GALVANISED SCREW 5x16 T.C. 3-LOBE CROSSHEAD DIN 7687

89122NA GALVANISED SCREW 5x13 T.C. 3-LOBE CROSSHEAD DIN 7687

89134NA SCREW 5x14 FOR PLATE HEAT EXCHANGER

96032LA 3 WAY VALVE C/MOLEX ATV 03 MULTIPLEX

GRUPPO

MULTIP

LEX

96034LA 3 WAY VALVE MOTOR MULTIPLEX

43145LA

43135LA

64066LA

64126LA

54022LA

64069LA

89122NA

89116NA

89116NA

20040LA

43139LA

43150LA

43139LA

43150LA

61004LP

96032LA

33027LA96018LA

64124LA

89134NA

54032LA

43248LA

43276LA

64123LA

64075LA54023LA64106LA43151LA

26127LA

43150LA64128LA

54022LA

54022LA

43150LA

96058LA

26133LA

54032LA

54022LA

43150LA

43003LA

43002LA

83546LP

43150LA

86014LA

43150LA

43159LA

41016LA

28253LA

67038LA

59015LA

67007LA


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RADIANT BRUCIATORI s.p.a.Via Pantanelli, 164/166 - 61025 Loc. Montelabbate (PU)Tel. +39 0721 9079.1 fax. +39 0721 9079279

RMAS 20 E - RAD - ING - MAN.INST - 0809B - DIGITECH.pdf

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