CAESAR 14 3 ESuper CAESAR 17 3 E

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Instruction booklet and warning IE

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Dear Client,Our compliments for having chosen a top-quality Immergas product, able to assure well-being and safety for a long period of time. As an Immergas customer you can also count on a qualified after-sales service, prepared and updated to guarantee constant efficiency of your water heater. Read the following pages carefully: you will be able to draw useful suggestions regarding the correct use of the appliance, the respect of which, will confirm your satisfaction for the Immergas product.For any interventions or routine maintenance contact Immergas Authorised Centres: these have original spare parts and boast of specific preparation directly from the manufacturer.

General recommendationsThe instruction book is an integral and essential part of the product and must be consigned to the new user also in the case of transfer or succession of ownership.It must be kept well and consulted carefully, as all of the warnings supply important indications for safety in the installation, use and maintenance stages.Installation and maintenance must be performed in compliance with the regulations in force, according to the manufacturer's instructions and by professionally qualified staff, intending staff with specific technical skills in the plant sector, as envisioned by the Law.Incorrect installation can cause injury to persons and animals and damage to objects, for which the manufacturer is not liable. Maintenance must be carried out by skilled technical staff. The Immergas Authorised After-sales Service represents a guarantee of qualifications and professionalism.The appliance must only be destined for the use for which it has been expressly declared. Any other use will be considered improper and therefore potentially dangerous. If errors occur during installation, running and maintenance, due to the non compliance of technical laws in force, standards or instructions contained in this book (or however supplied by the manufacturer), the manufacturer is excluded from any contractual and extra-contractual liability for any damages and the appliance warranty is invalidated. For further information regarding legislative and statutory provisions relative to the installation of gas heat generators, consult the Immergas site at the following address: www.immergas.com

DECLARATION OF CONFORMITYFor the purpose and effect of the 2009/142/CE Gas Appliance Directive, 2004/108/CE EMC Directive and 2006/95/CE Low Voltage Directive.The Manufacturer: Immergas S.p.A. v. Cisa Ligure n° 95 42041 Brescello (RE)DECLARES THAT: the Immergas water heaters model: Caesar 14 3 E and Super Caesar 17 3 Eis in compliance with the same European Community Directives

Mauro Guareschi

Research & Development Director

Signature:

INDEX USER page

Immergas S.p.A. declines all liability due to printing or transcription errors, reserving the right to make any modifications to its technical and commercial documents without forewarning.

INSTALLER page TECHNICIAN page

1 Water heater installation .......................... 41.1 Installation recommendations. ................ 41.2 Main dimensions. ..................................... 41.3 Anti-freeze protection. ............................. 51.4 Connections. .............................................. 51.5 Immergas flue systems. ............................ 61.6 Outdoor installation in partially protected

area. ............................................................. 61.7 Indoor installation. ................................... 91.8 Flue exhaust to flue/chimney. ................121.9 Ducting of flues or technical

slots. ..........................................................121.10 Flues, chimneys and chimney caps. ......121.11 Gas system start-up. ................................121.12 Water heater start up (ignition). ............121.13 Kits available on request. ........................121.14 Water heater components. .....................13

2 Instructions for use and maintenance. .142.1 Cleaning and maintenance. ...................142.2 General warnings. ...................................142.3 Control panel. ..........................................142.4 Use of the water heater. ..........................152.5 Troubleshooting. .....................................152.6 Information menu. ..................................152.7 Switch-off of the water heater. ..............152.8 Emptying the water heater. ....................152.9 Anti-freeze protection (optional). .........152.10 Case cleaning. ..........................................152.11 Decommissioning. ..................................15

3 Controls and maintenance. ....................163.1 Hydraulic diagram. .................................163.2 Wiring diagram. ......................................173.3 Troubleshooting. .....................................173.4 Converting the water heater to other

types of gas. ..............................................173.5 Checks following conversion to another

type of gas. ................................................173.6 Possible adjustments ...............................183.7 Programming the P.C.B. .........................183.8 Automatic slow ignition function with

timed ramp delivery. ...............................183.9 Solar function. .........................................193.10 Solar panels coupling function. .............193.11 Yearly appliance check and maintenance.

193.12 Casing removal. .......................................203.13 Variable heat output. ...............................213.14 Combustion parameters. ........................223.15 Technical data. .........................................23

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1 WATER HEATER INSTALLATION

1.1 INSTALLATION RECOMMENDATIONS.

The water heaters have been designed for wall installation only; they must be used for the production of domestic hot water and similar purposes. In the case of wall installation the wall surface must be smooth, without any protrusions or recesses enabling access to the rear part. They have NOT been designed to be installed on plinths or floors (Fig. 1-1).By varying the type of installation the classification of the water heater also varies, precisely:

- Water heater type B22 if installed without the 2 intake caps and with the top cover kit

- Type C water heater if installed using concentric pipes or other types of pipes envisioned for the sealed chamber water heaters for intake of air and expulsion of flue gases.

Only professionally qualif ied heating/plumbing technicians are authorised to install Immergas gas appliances. Installation must be carried out according to the standards, current legislation and in compliance with local technical regulations and the required technical procedures. Installation of the water heater when powered by LPG must comply with the rules regarding gases with a greater density than air (remember, as an example, that it is prohibited to install systems powered with the above-mentioned gas in rooms where the floor is at a lower quota that the average external country one). Before installing the appliance, ensure that it is delivered in perfect condition; if in doubt, contact the supplier immediately. Packing materials (staples, nails, plastic bags, polystyrene foam, etc.) constitute a hazard and must be kept out of the reach of children. If the appliance is installed inside or between cabinets, ensure sufficient space for normal servicing; therefore it is advisable to leave clearance of at least 3 cm between the water heater casing and the vertical sides of the cabinet. Leave adequate space above the water heater for possible water and flue removal connections.Keep all flammable objects away from the appliance (paper, rags, plastic, polystyrene, etc.).It is recommended not to position household appliances under the water heater because they could undergo damage in the case of leaks from the hydraulic fittings. If this is not the case, the manufacturer cannot be considered liable for any damage caused to the household appliances.In the event of malfunctions, faults or incorrect operation, turn the appliance off immediately

and contact a qualified technician (e.g. the Immergas Technical After-Sales Centre, which has specifically trained staff and original spare parts). Do not attempt to modify or repair the appliance alone. Failure to comply with the above implies personal responsibility and invalidates the warranty.

• Installation regulations: - this water heater can be installed outside in a

partially protected area. A partially protected location is one in which the water heater is not exposed to the direct action of the weather (rain, snow, hail, etc..).

- Installation in places with a fire risk is prohibited (for example: garages, box), gas appliances and relative flue ducts, flue exhaust pipes and combustion air intake pipes.

- Installation is prohibited on the vertical projection of the cooking surface.

- Installation is also prohibited in places/environments that constitute common parts of office condominiums such as stairs, cellars, entrance halls, attics, lofts, escape routes, etc. if they are not located inside technical compartments under the responsibility of each individual building and only accessible to the user (for the features of the technical compartments, see the Reference Standard).

Important: Wall mounting of the water heater must guarantee stable and efficient support for

1.2 MAIN DIMENSIONS.

the generator.The plugs (standard supply) are to be used only in conjunction with the mounting brackets or fixing template to fix the water heater to the wall; they only ensure adequate support if inserted correctly (according to technical standards) in walls made of solid or semi-hollow brick or block. In the case of walls made from hollow brick or block, partitions with limited static properties, or in any case walls other than those indicated, a static test must be carried out to ensure adequate support.

N.B.: the hex head screws supplied in the blister pack are to be used exclusively to fix the relative mounting bracket to the wall.

These appliances are used to heat water to below boiling temperature in atmospheric pressure.They must be connected to a DHW distribution network suited to their performance and power.

Height(mm)

Width (mm)(L)

Depth (mm)

630 Caesar 14 3 E = 375Super Caesar 17 3 E = 420 250

CONNECTIONSGAS DOMESTIC HOT WATER

G AC AF3/4” 1/2” 1/2”

Key: AC - Domestic hot water outlet AF - Domestic hot water inlet G - Gas supply V - Electrical connectionYES NO

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1.3 ANTI-FREEZE PROTECTION.Minimum temperature -15°C. If the water heater is installed in a place where the temperature falls below 0°C and in the event there is no gas (or the water heater goes into ignition block), the appliance can freeze.To prevent the risk of freezing follow the instructions below:- Protect the condensate drain trap and circuit

board against freezing by using an accessory that is supplied on request (anti-freeze kit) comprising two electric heating elements, the relevant cables and a control thermostat (carefully read the installation instructions contained in the accessory kit pack).

Water heater anti-freeze protection is thus ensured only if:- the water heater is correctly connected to

electricity power supply circuits;- main switch is inserted;- the anti-freeze kit components are efficient.In these conditions the water heater is protected against freezing to temperature of -15°C.

The warranty does not cover damage due to interruption of the electrical power supply and failure to comply with that stated on the previous page.

N.B.: if the water heater is installed in places where the temperature falls below 0°C, the heating attachment pipes must be insulated.

1.4 ATTACHMENTS.Gas connection (Appliance category II2H3+).Our water heaters are designed to operate with methane gas (G20) and LPG. Supply pipes must be the same as or larger than the 3/4”G water heater fitting. Before connecting the gas line, carefully clean inside all the fuel feed system pipes to remove any residue that could impair water heater efficiency. Also make sure the gas corresponds to that for which the water heater is prepared (see water heater data-plate). If different, the water heater must be converted for operation with the other type of gas (see converting appliance for other gas types). The dynamic gas supply (methane or LPG) pressure must also be checked according to the type used in the water heater, as insufficient levels can reduce generator output and cause malfunctions.Ensure correct gas cock connection. The gas supply pipe must be suitably dimensioned according to current regulations in order to guarantee correct gas flow to the burner even in conditions of maximum generator output and to guarantee appliance efficiency (technical specifications). The coupling system must conform to standards.

Fuel gas quality. The appliance has been designed to operate with gas free of impurities; otherwise it is advisable to fit special filters upstream from the appliance to restore the purity of the gas.Storage tanks (in case of supply from LPG depot).- New LPG storage tanks may contain residual

inert gases (nitrogen) that degrade the mixture delivered to the appliance casing functioning anomalies.

- Due to the composition of the LPG mixture, layering of the mixture components may occur during the period of storage in the tanks. This can cause a variation in the heating power of the mixture delivered to the appliance, with subsequent change in its performance.

Hydraulic connectionImportant: before connecting the water heater and so as not to make the warranty null and void on the DHW heat exchanger, wash the system thoroughly (piping, etc.) in a way to remove any residues that could compromise the good functioning of the water heater.

Water connections must be made in a rational way using the couplings on the water heater template.

Important: to preserve the duration of appliance efficiency features, in the presence of water whose features can lead to the deposit of lime scale, installation of the “polyphosphate dispenser” kit is recommended . On the basis of the Standards in force, it is mandatory to treat the supply water with temporary water hardness over or equal to 25 French degrees in the heating circuit and over than or equal to 15 French degrees for DHW, using conditioning chemicals for powers ≤ 100 kW or with softeners for powers > 100 kW

Electrical connection: The “Caesar” water heater has an IPX5D protection rating for the entire appliance. Electrical safety of the appliance is reached only when it is correctly connected to an efficient earthing system as specified by current safety standards.

Important: Immergas S.p.A. declines any responsibility for damage or physical injury caused by failure to connect the water heater to an efficient earth system or failure to comply with the reference standards.

Also ensure that the electrical installation corresponds to maximum absorbed power specifications as shown on the water heater data-plate. Water heaters are supplied complete with an “X” type power cable without plug. The power supply cable must be connected to a 230V ±10% / 50Hz mains supply respecting L-N polarity and earth connection This network must also have an omnipolar circuit breaker with class III over-voltage category. When replacing the power supply cable, contact a qualified technician (e.g. the Immergas After-Sales Technical Assistance Service). The power cable must be laid as shown (Fig. 1-3).In the event of mains fuses replacement on the connection board, use a 3.15A quick-blow fuses. For the main power supply to the appliance,

never use adapters, multiple sockets or extension leads.

N.B.: all water heater pipes must never be used to earth the electric or telephone lines. Ensure elimination of this risk before making the water heater electrical connections.

Power supply cable

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1.6 OUTDOOR INSTALLATION IN PARTIALLY PROTECTED AREA.

N.B.: a partially protected area is one in which the appliance is not exposed to the direct action of the weather (rain, snow, hail, etc..)..

• Configuration type B, open chamber and forced draught.

Using the relevant cover kit direct air intake is possible (Fig. 1-7) and flue gases are exhausted into a single flue or directly to the outside. In this configuration it is possible to install the water heater in a partially protected place.In this configuration the water heater is classified as type B22.With this configuration:- air intake takes place directly from the room

in which the appliance is installed (outdoor);- the flue exhaust must be connected to its own

individual flue or channelled directly into the external atmosphere.

The technical regulations in force must be respected.

• Cover kit assembly (Fig. 1-6). Remove the two plugs and the gaskets present from the two lateral holes with respect to the central one.

Position the diaphragm on the discharge hole: Caesar 14 3 E: Ø 45 present inn the water

heater. Super Caesar 17 3 E: Ø 44 present in the

thermoformed kit. Install the Ø 80 outlet flange on the central

hole of the water heater, taking care to insert the gasket supplied with the kit and tighten by means of the screws provided. Install the upper cover, fixing it using the screws and relevant gaskets present in the kit. Fit the 90° Ø 80 curve with the male side (smooth) into the female side (with lip seals) of the Ø 80 flange, up to stop.Cut the gasket in the relevant groove at the desired diameter (Ø 80), run it along the curve and fix it using the sheet steel plate. Fit the male end (smooth) of the exhaust terminal into the the female end of the bend 90° Ø 80, making sure that the relevant wall sealing plate is already fitted; this will ensure hold and joining of the elements making up the kit.

• Coupling of extension pipes. To install push-fitting extensions with other elements of the flue extraction elements assembly, proceed as follows: Couple the pipe or elbow with the male side (smooth) in the female side (with lip seal) to the end stop on the previously installed element. This will ensure sealing efficiency of

the coupling.Max. length of exhaust duct. The flue pipe (vertical or horizontal) can be extended to a max. length of 12 straight metres(Fig. 1-21). To prevent problems of flue gas condensate in the exhaust pipe Ø 80, due to flue gas cooling through the wall,the length of the pipe (not insulated) must be limited to just 5 m.

Example of installation with direct vertical terminal in partially protected location. When the vertical terminal for direct discharge of combustion products is used, a minimum gap of 300 mm must be left between the terminal and the balcony above. The height X+Y+Z+W evaluated with respect to the balcony above, must be equal to or more than 2000 mm. (Fig. 1-8). The term W must only be considered if the balcony above has closed balustrade (W=0 if the balustrade is open).

• Configuration without cover kit (water heater type C).

By leaving the side plugs fitted, it is possible to install the appliance externally, in partially covered places, without the cover kit. Installation takes place using the Ø60/100 and Ø80/125 concentric horizontal intake/ exhaust kits. Refer to the paragraph relative to indoor installation. In this configuration the upper cover kit guarantees additional protection for the water heater. It is recommended but not compulsory.

1.5 IMMERGAS FLUE SYSTEMS.Immergas supplies various solutions separately from the water heaters regarding the installation of air intake terminals and flue extraction, which are fundamental for water heater operation.

Important: the water heater must only be installed together with an original Immergas air intake and flue gas exhaust system. This system can be identified by an identification mark and special distinctive marking bearing the note: “not for condensing boilers”.

The flue exhaust pipes must not be in contact with or be near to flammable materials. Moreover, they must not pass through buildings or walls made of flammable material.

Positioning of double lip seals. For correct positioning of lip seals on elbows and extensions, follow the direction of assembly given in figure (Fig. 1-4).

• Resistance factors and equivalent lengths. Each flue extraction system component has a Resistance Factor based on experimental tests and specified in the table below. The resistance factor for individual components is independent from the type of water heater on which it is installed or the actual dimensions. It is, however, conditioned by the temperature of the fluids that pass through the pipe and therefore varies according to applications for air intake or flue exhaust. Each individual component has a resistance corresponding to a certain length in metres of pipe of the same diameter; the so-called equivalent length, obtained from the ratio between the relative Resistance Factors. All water heaters have an experimentally obtainable maximum Resistance Factor equal to 100.The maximum Resistance Factor allowed corresponds to the resistance encountered with the maximum allowed pipe length for each type of Terminal Kit. This information enables calculations to verify the possibility of various configurations of flue extraction systems.

Diaphragm installation. For correct functioning of the water heater, a Ø 45 diaphragm must be installed on the outlet of the sealed chamber and before the intake and exhaust pipe for the “Caesar 14 3 E” model and a diaphragm of Ø 46 for the “Super Caesar 17 3 E” model (Fig. 1-9).

N.B.: the diaphragm is supplied as per standard with the water heater.

Upper lid

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The terminal kit includes: N° 1 - Gasket N° 1 - Exhaust flange Ø 80 N° 1 - Bend 90° Ø 80 N° 1 - Exhaust pipe Ø 80 N° 1 - Wall sealing plate

The cover kit includes: N° 1 - Heat moulded cover N° 1 - Ø 44 discharge diaphragm N°1 - Gasket clamping plate N° 1 - Gasket

* The values for maximum length are considered with 1 metre of exhaust pipe and the remaining on intake.

* The values for maximum length are considered with 1 metre of exhaust pipe and the remaining on intake.

Diaphragm Extension in meterspipe Ø 60/100 horizontal

Ø 46 From 0 to 1

NONE Exceeding 1

Diaphragm Extension in meterspipe Ø 60/100 horizontal

Ø 45 From 0 to 1

NONE Exceeding 1

Diaphragm Pipe extension in metres Ø 60/100 vertical

Ø 46 From 0 to 2.2

NONE Exceeding 2.2

Diaphragm Pipe extension in metres Ø 60/100 vertical

Ø 45 From 0 to 2.7

NONE Exceeding 2.7

Diaphragm*Extension in metres

vertical pipe Ø 80without bends

Ø 46 From 0 to 22

NONE Exceeding 22

Diaphragm*Extension in metres

vertical pipe Ø 80without bends

Ø 45 From 0 to 25

NONE Exceeding 25

Diaphragm*Extension in meters

horizontal pipe Ø 80 with two bends

Ø 46 From 0 to 17

NONE Exceeding 17

Diaphragm*Extension in meters

horizontal pipe Ø 80 with two bends

Ø 45 From 0 to 20

NONE Exceeding 20

Caesar 14 3 E discharge diaphragm. Caesar 17 3 E Super discharge diaphragm.

INTAKE COVER KIT

VERTICAL TERMINAL KIT FOR DIRECT DRAINING

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Tables of Resistance Factors and Equivalent Lengths.

DUCT TYPEResistance

Factor(R)

Equivalent length in m of concentric pipe

Ø 60/100

Equivalent length

in m of pipeØ 80

Concentric pipe Ø 60/100 m 1

Intake andExhaust 16.5 m 1

Intake m 7.1

Exhaust m 5.5

Concentric bend 90° Ø 60/100

Intake andExhaust 21 m 1.3

Intake m 9..1

Exhaust m 7.0

Concentric bend 45° Ø 60/100

Intake andExhaust 16.5 m 1

Intake m 7.1

Exhaust m 5.5

Terminal complete with concentric horizontal intake-exhaust Ø 60/100 Intake and

Exhaust 46 m 2.8Intake m 20

Exhaust m 15

Concentric horizontal intake- exhaust terminal Ø 60/100 Intake and

Exhaust 32 m 1.9Intake m 14

Exhaust m 10.6

Concentric vertical intake-exhaust terminal Ø 60/100 Intake and

Exhaust 41.7 m 2.5Intake m 18

Exhaust 14

Pipe Ø 80 m 1 (with and without insulation)Intake 2.3 m 0.1 Intake m 1.0

Exhaust 3 m 0.2 Exhaust m 1.0

Complete air intake terminal Ø 80 m 1 (with or without insulation) Intake 5 m 0.3 Intake m 2.2

Intake terminal Ø 80 Exhaust terminal Ø 80 Intake 3 m 0.2 Intake m 1.3

Exhaust 2.5 m 0.1 Exhaust m 0.8

Bend 90° Ø 80Intake 5 m 0.3 Intake m 2.2

Exhaust 6.5 m 0.4 Exhaust m 2.1

Bend 45° Ø 80Intake 3 m 0.2 Intake m 1.3

Exhaust 4 m 0.2 Exhaust m 1.3

Split parallel Ø 80 from Ø 60/100 to Ø 80/80 Intake and

Exhaust 8.8 m 0.5Intake m 3.8

Exhaust m 2.9

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1.7 INDOOR INSTALLATION.• Type C configuration, sealed chamber and

fan assisted.Horizontal intake - exhaust kit Ø60/100. Kit assembly (Fig. 1-10): install the bend with flange (2) onto the central hole of the water heater inserting the gasket (1) and tighten using the screws in the kit. Couple the terminal pipe (3) with the male end (smooth) into the female end of the bend (with lip seals) up to the stop; making sure that the internal wall sealing plate and external wall sealing plate have been fitted, this will ensure sealing and joining of the elements making up the kit.

Note: when the water heater is installed in areas where very rigid temperatures can be reached, a special anti-freeze kit is available that can be installed as an alternative to the standard kit.• Coupling extension pipes and concentric elbows

Ø 60/100. To snap-fit extensions with other elements of the flue gas extraction elements, operate as follows Install the concentric pipe or elbow with the male side (smooth) on the female section (with lip seal) to the end stop on the previously installed element. This will ensure the sealing and joining of the elements correctly.

The Ø 60/100 horizontal intake/exhaust kit can be installed with the rear, right side, left side and front outlet.

• Application with rear outlet (Fig. 1-11). The 788 mm pipe length enables routing through a wall with maximum thickness of 788 mm. Normally the terminal must be shortened. Calculate the distance by adding the following values: Part thickness + internal projection + external projection. The minimum indispensable projection values are given in the figure.

• Application with lateral output (Fig. 1-12); Only using the horizontal intake-exhaust kit, without the relevant extensions, permits to pass through a wall with thickness of 715.5 mm with the Caesar 14 3 E and of 705 mm with the Super Caesar 17 3 E (height “X”), both with left and right lateral output.

• Extensions for horizontal kit. The horizontal intake-exhaust kit Ø 60/100 can be extended up to a max. horizontal distance of 3000 mm including the terminal with grid and excluding the concentric bend leaving the water heater. This configuration corresponds to a resistance factor of 100. In these cases the special extensions must be requested.

Connection with N°1 extension (Fig. 1-13). Max. distance between vertical water heater axis and external wall is 1855mm.

Connection with N°2 extensions (Fig. 1-14). Max. distance between vertical water heater axis and external wall is 2805mm.

The kit includes: N°1 - Gasket (1) N°1 - Concentric bend 90° (2) N°1 - Intake/exhaust concentric pipe

Ø60/100 (3) N°1 - Internal white wall sealing plate (4) N°1 - External grey wall sealing plate (5)

• External grill. N.B.: for safety purposes, do not even temporarily obstruct the water heater intake-exhaust terminal.

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Vertical kit with aluminium tile Ø 60/100. Kit assembly (Fig. 1-16): install the concentric flange (2) on the central hole of the water heater inserting the gasket (1) and tighten using the screws in the kit. Imitation aluminium tile installation. Replace the tile with the aluminium sheet (4), shaping it to ensure that rainwater runs off. Position the fixed half-shell (6) and insert the intake-exhaust pipe (5). Fit the Ø 60/100 concentric terminal pipe with the male end (5) (smooth) to the female end of the flange (2) (with lip gasket) up to the stop; making sure that the wall sealing plate (3) has been fitted, this will ensure sealing and joining of the elements making up the kit.

• Coupling extension pipes and concentric elbows. To install push-fitting extensions with other elements of the flue extraction elements assembly, proceed as follows: Install the concentric pipe or elbow with the male side (smooth) on the female section (with lip seal) to the end stop on the previously installed element. This will ensure sealing and joining of the elements correctly.

Important: if the exhaust terminal and/or extension concentric pipe needs shortening, consider that the internal duct must always protrude by 5 mm with respect to the external duct.

This specific terminal enables flue exhaust and air intake, necessary for combustion, in a vertical direction.

N.B.: the Ø 60/100 vertical kit with aluminium tile enables installation on terraces and roofs with a maximum slope of 45% (25°) and the height between the terminal cap and half-shell (374 mm) must always be respected.

The vertical kit with this configuration can be extended up to a maximum of 4700 mm vertical rectilinear, with the terminal included (Fig. 1-17). This configuration corresponds to a resistance factor of 100. In this case the special extensions must be requested.

Separator kit Ø 80/80. The Ø 80/80 separator kit, allows separation of the exhaust flues and air intake pipes according to the diagram shown in the figure.

Combustion products are expelled from pipe (S). Air is taken in through pipe (A) for combustion. The intake pipe (A) can be installed either on the right or left hand side of the central exhaust pipe (S). Both ducts can be routed in any direction.

• Kit assembly (Fig. 1-18): install flange (4) on the central hole of the water heater, fitting gasket (1) and tighten with the flat-tipped hex screws included in the kit. Remove the flat flange present in the lateral hole with respect to the central one (according to needs) and replace it with the flange (3), positioning the gasket (2) already present in the water heater and tighten using the supplied self-threading screws. Fit the male end (smooth) to the bends (5) in the female end of the flanges (3 and 4). Fit the intake terminal (6) with the male section (smooth) in the female section of the bend (5) up to the stop, ensuring that the internal and external wall sealing plates are fitted. Fit the exhaust pipe (9) with the male end (smooth) to the female end of the bend (5) up to the stop; making sure that the internal wall sealing plate has been fitted, this will ensure sealing and joining of the elements making up the kit.

• Coupling of extension pipes and elbows. To install push-fitting extensions with other elements of the flue extraction elements assembly, proceed as follows: Install the pipe or elbow with the male side (smooth) on the

female section (with lip seal) to the end stop on the previously installed element. This will ensure sealing and joining of the elements correctly.

• Installation clearances. Figure 1-19 gives the min. installation space dimensions of the Ø 80/80 separator terminal kit in limited conditions.

• Figure 1-20 shows the configuration with vertical exhaust and horizontal intake.

• Extensions for the separator kit Ø 80/80. The max. vertical straight length (without bends) that can be used for Ø 80 intake and exhaust pipes is 41 metres of which 40 intake and 1 exhaust. The total length corresponds to a resistance factor of 100. The total usable length obtained by adding the length of the intake and exhaust pipes Ø 80, must not exceed the values stated in the following table. If mixed accessories or components are used, the maximum extension can be calculated by using a resistance factor for each component or its equivalent length. The sum of these resistance factors must not exceed 100.

The kit includes: N°1 - Gasket (1) N°1 - Female concentric

flange (2) (sold sepa-rately)

N°1 - Wall sealing plate (3) N°1 - Aluminium tile (4) N°1 - Int./exhaust concentric

pipe Ø 60/100 (5) N°1 - Fixed half-shell (6) N°1 - Mobile half-shell (7)

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The kit includes: N°1 - Exhaust gasket (1) N°1 - Female intake flange (3) N°1 - Flange gasket (2) N°1 - Female exhaust flange (4) N°2 - 90° bend Ø 80 (5) N°1 - Intake terminal Ø 80 (6) N°2 - Internal white wall sealing plates (7) N°1 - External grey wall sealing plate (8) N°1 - Exhaust pipe Ø 80 (9)

Important: if the installation requests a development of the flue to the discharge that exceeds the recommended 12 m, due consideration must be given to the formation of condensate that could take place inside the pipe and Immergas insulated “Blue Series” flue kits must be used.

• Configuration type B, open chamber and forced draught.

When using type B installation configuration indoors, it is compulsory to install the relative upper cover kit along with the flue gas discharge kit. The air intake comes directly from the area where the water heater is installed and from the flue exhaust in each single flue or directly from outdoors.

The water heater in this configuration, following the assembly instructions stated in the par. 1.6 is classified as type B22.With this configuration:- air intake takes place directly from the

environment in which the boiler is installed and only functions in permanently ventilated rooms;

- the flue exhaust must be connected to its own individual flue or channelled directly into the external atmosphere.

- type B open chamber water heaters must not be installed in places where commercial, artisan or industrial activities take place, which use products that may develop volatile vapours or substances (e.g. acid vapours, glues, paints, solvents, combustibles, etc.), as well as dusts (e.g. dust deriving from the working of wood, coal

fines, cement, etc.). These may be damaging for the components of the appliance and jeopardise functioning.

- in type B22 configuration, the water heaters must not be installed in bedrooms or bathrooms.

On installation indoors in type B configuration it is mandatory to install the relevant top cover kit along with the flue gas exhaust kit.The technical regulations in force must be respected.

Maximum usable lengths(including intake terminal with grill and two 90° bends)

NON-INSULATED PIPE INSULATED PIPEDrain (metres) Intake (metres) Drain (metres) Intake (metres)

1 36.0* 6 29.5*

2 34.5* 7 28.0*

3 33.0* 8 26.5*

4 32.0* 9 25.5*

5 30.5* 10 24.0*

* The air intake pipe can be increased to 2.5 metres if the exhaust bend is eliminated. 2 metres if the air intake bend is eliminated. 4.5 metres eliminating both bends.

11 22.5*

12 21.5*

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1.8 FLUE EXHAUST TO FLUE/CHIMNEY.Flue exhaust does not necessarily have to be connected to a branched type traditional flue. The discharge of flue gases, just for the water heaters installed in configuration C, can be connected to a particular LAS type collective flue. For B22 configurations, discharge is only allowed into individual flue or directly into the outside atmosphere by the relevant terminal. Multiple and combined flues must be specially designed according to the calculation method and requirements of the standards, by professionally qualified technical staff. Chimney or flue sections for connection of the exhaust pipe must comply with requisites of technical standards in force.

1.9 DUCTING OF FLUES OR TECHNICAL SLOTS.

With a specific “ducting system” it is possible to reuse existing flues, chimneys and existing or new technical slots to discharge the water heater flue gases. Ducting requires the use of ducts declared to be suitable for the purpose by the manufacturer. Follow the installation and user instructions provided by the manufacturer and the requirements of standards.

1.10 FLUES, CHIMNEYS AND CHIMNEY CAPS.

The flues, chimneys and chimney caps for the evacuation of combustion products must be in compliance with applicable standards.

Positioning the exhaust terminals. The exhaust terminals must:- be installed on external perimeter walls of the

building;- be positioned according to the minimum

distances specified in current technical standards.

Combustion products exhaust of natural or fan assisted appliances in open-top closed environments. In spaces closed on all sides with open tops (ventilation pits, courtyards etc.), direct flue gas exhaust is allowed for natural or forced draught gas appliances with a heating power range from 4 to 35 kW, provided the conditions as per the current technical standards are respected.

1.11 GAS SYSTEM START-UP.To start up the system, make reference to the Standard: This divides the systems and therefore the start-up operations into three categories: new systems, modified systems, re-activated systems. In particular, for new gas systems:- open windows and doors;- avoid presence of sparks or naked flames;- bleed all air from pipelines;- check that the internal system is properly sealed

according to specifications.

1.12 WATER HEATER START UP (IGNITION).

For issue of the Declaration of Conformity provided for by Italian Law, the following must be performed for water heater start-up:- check that the internal system is properly sealed

according to specifications;- ensure that the type of gas used corresponds to

water heater settings;- switch the water heater on and ensure correct

ignition;- make sure that the gas flow rate and relevant

pressure values comply with those given in the manual (par. 3.13);

- ensure that the safety device is engaged in the event of gas supply failure and check activation time;

- check activation of the main switch located upstream from the water heater;

- check that the concentric intake-exhaust terminal (if fitted) is not blocked.

The water heater must not be started up even if only one of the checks should be negative.

N.B.: the water heater preliminary check must be carried out by a qualified technician. The conventional water heater warranty is valid as of the date of testing.The test certificate and warranty is issued to the user.

1.13 KITS AVAILABLE ON REQUEST.• Polyphosphate dispenser kit. The polyphosphate

dispenser reduces the formation of lime-scale and preserves the original heat exchange and domestic hot water production conditions. The water heater is prepared for application of the polyphosphate dispenser kit.

• Covering kit. For outdoor installations, in partially protected areas and with direct air intake, the top protection cover must be fitted for a correct functioning of the water heater and to protect it from storms (Fig. 1-8). For indoor installations, type B configuration, a suitable top protection cover coupled with the flue exhaust kit must be fitted.

• Anti freeze kit with resistance (on request). If the water heater is installed in a place where the temperature falls below 0°C and the appliance can freeze. To prevent freezing of the domestic hot water system, an anti freeze kit with an electrical resistance can be fitted from the relative cable and from a control thermostat.

• Bracket kit for Omni Container. If necessary, the water heater can be installed inside the Omni Container. For assembly, use the relevant support bracket contained in the kit.

The above-mentioned kits are supplied complete with instructions for assembly and use.

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1.14 WATER HEATER COMPONENTS.

Key: 1 - Sealed chamber 2 - Fan 3 - DHW heat exchanger 4 - Ignition/detection electrode 5 - Gas valve 6 - Flue pressure switch 7 - Safety thermostat 8 - Flue hood 9 - DHW probe (hot water output) 10 - Combustion chamber 11 - Burner 12 - Gas manifold 13 - Flow limiter 14 - One-way valve 15 - Flow rate meter 16 - Domestic water inlet cock 17 - DHW probe (cold water input)

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2 INSTRUCTIONS FOR USE AND MAINTENANCE.

2.1 CLEANING AND MAINTENANCE.The appliance must be serviced every year.This ensures that the optimal safety, performance and operation characteristics of the water heater remain unchanged over time.

2.2 GENERAL WARNINGSNever expose the wall-mounted water heater to direct vapours from a cooking surface.Use of the water heater by unskilled persons or children is strictly prohibited.Do not touch the flue gas exhaust terminal (if present) due to the high temperatures it can reach;For safety purposes, check that the concentric air intake/flue exhaust terminal (if fitted), is not blocked.Whenever temporary deactivation of the water heater is decided, the electric, water and gas supplies must be interrupted.In the case of work or maintenance to structures located in the vicinity of ducting or devices for flue extraction and relative accessories, switch off the appliance and on completion of operations ensure that a qualified technician

checks efficiency of the ducting or other devices.Never clean the appliance or connected parts with easily flammable substances.Never leave containers or flammable substances in the same environment as the appliance.

• Important: the use of components involving use of electrical power requires some fundamental rules to be observed:

- do not touch the appliance with wet or moist parts of the body; do not touch when barefoot;

- never pull electrical cables or leave the appliance exposed to atmospheric agents (rain, sunlight, etc.);

- the appliance power cable must not be replaced by the user;

- in the event of damage to the cable, switch off the appliance and contact exclusively qualified staff for replacement;

- if the appliance is not to be used for a certain period, disconnect the main power switch.

2.3 CONTROL PANEL.

Key: 1 - On/Stand-by/Off Button 2 - Reset button 3 - Temperature selector 4 - Domestic hot water function 5 - Temperature and error code display 6 - Unit of measurement

7 - Not used on this model 8 - Not used on this model 9 - Not used on this model 10 - Output efficiency 11 - Flame presence

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2.4 USE OF THE WATER HEATER.Ignition (Fig. 2-1). Before ignition, check that the DHW inlet valve is open.- Open the gas cock upstream from the water

heater.- Press the button (1) until the display switches

on; pressing the button passes cyclically from the “off ”, “stand-by” and “on” state of the appliance.

- Regulate the DHW temperature according to requirements by turning the selector (3).

Turning in a clockwise direction the temperature increases and in an anti-clockwise direction it decreases.

From this moment the water heater functions automatically. If there is no request for DHW, it goes to "Stand-by" which is equal to water heater powered without flame presence. The display shows the temperature of the water inside the water heater (5). Each time the burner ignites, the relative flame present symbol is displayed (11) with relative power scale (10). Moreover, the indication of the instant temperature supplied by the water heater is supplied.

• “Stand-by” mode. Repeatedly press the button (1) until the ( ) symbol appears. The water heater is inactive from this moment. The indication of any anomalies is however guaranteed.

N.B.: in these conditions the water heater is considered still powered.

• “Off ” mode. Press button (1) repeatedly until the display switches off. In this way the water heater is off completely.

N.B.: in these conditions the water heater is considered still live even if there are no functions active.

2.5 FAULT AND ANOMALY SIGNALS.The water heater signals out anomalies by flashing on the display and relative error codes, listed on the table, are displayed.

Anomaly signalledcode

displayed(flashing)

No ignition block 01

Over-heating (safety) thermo-stat block 02

Domestic hot water probe anomaly 06

Maximum N° of reset 08

Flue pressure switch failure 11

Domestic hot water inlet probe anomaly 12

Parasite flame 20

Push button control panel anomaly 24

Low power supply voltage 37

Ignition block. The water heater ignites automatically with each demand for hot water production. If this does not occur within 10 seconds, the water heater goes into ignition block (code 01). To eliminate “ignition block” the Reset button (2) must be pressed. On commissioning or after extended inactivity it may be necessary to

eliminate the “ignition block”. If this phenomenon occurs frequently, contact a qualified technician for assistance (e.g. Immergas After-Sales Technical Assistance Service).

Overtemperature thermostat block. During normal functioning, if a fault causes excessive overheating internally, the water heater goes into overtemperature block (code 02). After allowing to cool, eliminate the "overtemperature block" by pressing the Reset key (2). If this phenomenon occurs frequently, contact a qualified technician for assistance (e.g. Immergas After-Sales Technical Assistance Service).

Domestic hot water probe anomaly. If the board detects an anomaly on the delivery probe (code 06), the water heater will not start; contact a qualified technician for assistance (e.g. Immergas After-Sales Technical Assistance Service).

Maximum N° of reset. To eliminate any “anomaly” the Reset button (2) must be pressed. The Anomaly can be reset 5 times consecutively, after which the function in inhibited for at least one hour. One attempt is gained every hour for a maximum of 5 attempts.

Flue gas pressure switch failure. This occurs if the intake or exhaust pipes are blocked, in case of a fan fault or a fault on the flue gas pressure switch (code 11). If normal conditions are restored the water heater restarts without having to be reset. If this anomaly persists, contact a qualified technician for assistance (e.g. Immergas After-Sales Technical Assistance Service).

Domestic hot water inlet probe anomaly. If the board detects an anomaly on the domestic hot water NTC probe, the water heater signals the anomaly. In this case the water heater continues to produce domestic hot water but not with optimal performance. A qualified technician however must be called (e.g. Immergas After-Sales Service).

Parasite flame. This occurs in case of a leak on the detection circuit or anomaly in the flame control unit.(code 20), try to reset the water heater. If the anomaly continues contact a qualified technician (e.g. Immergas After-Sales Technical Assistance Service).

Push button control panel anomaly. This occurs when the circuit board detects an anomaly on the push button control panel. If normal conditions are restored the water heater restarts without having to be reset. If this anomaly persists, contact a qualified technician for assistance (e.g. Immergas After-Sales Technical Assistance Service).

Low power supply voltage This occurs when the power supply voltage is lower than the allowed limits for the correct functioning of the water heater. If normal conditions are restored the water heater restarts without having to be reset. If this phenomenon occurs frequently, contact a qualified technician for assistance (e.g. Immergas After-Sales Technical Assistance Service).

2.6 INFORMATION MENU.Pressing the button (2) for 8 seconds, the “Information menu” is activated, which allows to display some water heater functioning parameters. To scroll the various parameters, press the button (2), to exit the menu, press the button (1) or wait for 15 minutes.

List of parameters.N°

parameter Description

d1 Displays the instant DHW flow rate (l/min)

d2 Displays the temperature of the inlet water on the water heater.

d3Displays the temperature of the outlet water from the water heater.

d4Displays the temperature set on the water heater via the temperature selector (3)

2.7 SWITCH-OFF OF THE WATER HEATER.

Press the button (1 Fig. 2-1) ( ) until the display is switched off completely.

N.B.: in these conditions the water heater is considered still powered.

Disconnect the external omnipolar water heater switch and close the gas cock upstream of the appliance. Never leave the water heater switched on if left unused for prolonged periods.

2.8 EMPTYING THE WATER HEATER.To empty the water heater, close the cold water inlet valve and open the hot water valve lower down in the water network in the room.

2.9 ANTI-FREEZE PROTECTION (OPTIONAL).

The water heater can be equipped with an optional anti-freeze kit, which protects it from freezing to outdoor temperatures of -15°C. For correct installation of the kit and especially to guarantee appropriate functioning, the instructions supplied with the kit itself must be followed.

2.10 CASE CLEANING.Use damp cloths and neutral detergent to clean the water heater casing. Never use abrasive or powder detergents.

2.11 DECOMMISSIONING.In the event of permanent shutdown of the water heater, contact professional staff for the procedures and ensure that the electrical, water and gas supply lines are shut off and disconnected.

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3 CONTROL AND MAINTENANCE

3.1 HYDRAULIC DIAGRAM.

Key: 1 - Fan 2 - Sealed chamber 3 - Safety thermostat 4 - Primary heat exchanger 5 - DHW probe (hot water output) 6 - Burner 7 - Gas valve 8 - Flue pressure switch

9 - Flue hood 10 - One-way valve 11 - Flow limiter 12 - Flow rate meter 13 - DHW probe (cold water input) 14 - Domestic hot water inlet valve

AC - Domestic hot water outlet AF - Domestic cold water inlet G - Gas supply

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3.2 WIRING DIAGRAM.

3.3 TROUBLESHOOTINGN.B.: maintenance interventions must be carried out by a qualified technician (e.g. Immergas After-Sales Technical Assistance Service).

- Smell of gas. Caused by leakage from gas circuit pipelines. Check sealing efficiency of gas intake circuit.

- The fan works but ignition discharge does not occur on the burner ramp. The fan may start but the safety air pressure switch does not switch the contact over. Make sure:

1) 1) the intake-exhaust duct is not too long (over allowed length).

2) 2) the intake-exhaust pipe is not partially blocked (on the exhaust or intake side).

3) the diaphragm of the flue gas exhaust is adequate for the length of the intake-exhaust duct.

4) that the sealed chamber is kept in good conditions.

5) the fan power supply voltage is not less than 196 V.

- Irregular combustion (red or yellow flame). This may be caused by: dirty burner, incorrect combustion parameters, intake - exhaust terminal not correctly installed. Clean the above components and ensure correct installation of the terminal.

- Frequent activation of the overheating temperature or safety thermostat. It can depend on an anomaly on the water heater P.C.B. or and anomaly of the regulation NTC probe.

- Ignition block see par. 2.6 and 1.4 (electric connection).

- Low water flow: if, as a result of lime scale (calcium and magnesium), the domestic hot water system does not work properly contact a qualified technician for descaling e.g. Immergas

After-Sales Technical Service according to good practice. To preserve integrity and efficiency of the heat exchanger, a non corrosive descaler must be used. Cleaning must be carried out without the use of tools which can damage the heat exchanger.

3.4 CONVERTING THE WATER HEATER TO OTHER TYPES OF GAS.

If the boiler has to be converted to a different gas type to that specified on the data plate, request the relative conversion kit for quick and easy conversion.Boiler conversion must be carried out by a qualified technician (e.g. Immergas After-Sales Technical Assistance Service).To convert to another type of gas the following operations are required:- remove the voltage from the appliance;- replace the main burner injectors, making sure

to insert the special seal rings supplied in the kit, between the gas manifold and the injectors;

- apply voltage to the appliance;- Use the push button control panel to select the

gas parameter type (P2) and then select (nG) in case of Methane supply or (LG) in the case of LPG;

- adjust the water heater nominal heat output;- adjust the water heater minimum heat output;- seal the gas flow rate devices (if adjusted);- after completing conversion, apply the sticker,

present in the conversion kit, near the data-plate. Using an indelible marker pen, cancel the data relative to the old type of gas.

These adjustments must be made with reference to the type of gas used, following that given in the table (Par. 3.13).

3.5 CHECKS FOLLOWING CONVERSION TO ANOTHER TYPE OF GAS.

After making sure that conversion was carried out with a nozzle of suitable diameter for the type of gas used and the settings are made at the correct pressure, check that:- there is no flame in the combustion chamber- the burner flame is not too high or low and that

it is stable (does not detach from burner)- the pressure testers used for calibration are

perfectly closed and there are no leaks from the gas circuit.

N.B.: all water heater adjustment operations must be carried out by a qualified technician (e.g. Immergas After-Sales Technical Assistance). Burner adjustment must be carried out using a differential "U" or digital type pressure gauge, connected to a Y-shaped pipes to be placed on the small silicone pipe that goes from the gas valve to the sealed chamber and to the gas valve outlet pressure point (part. 4 fig. 3-3), keeping to the pressure value given in the table par. 3.13 according to the type of gas for which the water heater is prepared.

Key: B2 - Domestic hot water probe B6 - Domestic hot water flow meter B9 - DHW inlet probe DS1 - Display E3 - Ignition/detection electrodes F1 - Phase fuse F2 - Neutral fuse M20 - Fan R5 - Domestic hot water temperature selector S2 - Stand-by - On Button S3 - Reset button S6 - Flue pressure switch T2 - Ignition transformer Y1 - Gas valve Y2 - Gas valve modulator

230 Vac50 Hz

Power supply

Blue

Blue

Blue

Brow

n

Brow

n

Brow

n

Blac

kBl

ack

Blac

kBl

ack

Blac

kRe

d

Con

dens

er

Red

Red

Whi

te

Gre

y

Gre

y

Whi

teW

hite

Whi

te

Yello

w/G

reen

THE X6 CONNECTOR IS USED FOR AUTOMATIC INSPECTION

N.B. THE USER INTERFACE IS ON THE WELDING SIDE OF THE BOILER BOARD

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SIT 845 Gas Valve

Key: 1 - Coil 2 - Minimum power adjustment screws 3 - Maximum power adjustment screw 4 - Gas valve outlet pressure point 5 - Gas valve inlet pressure point 6 - Protection hood

3.6 POSSIBLE ADJUSTMENTS• Adjustment of nominal heat output (Fig. 3-3).- Turn the hot water selector knob (3 Fig. 2-1)

to the maximum functioning position;- Open the domestic hot water cock in order to

prevent modulation intervention.- Adjust the water heater nominal power on the

brass nut (3), keeping to the maximum pressure values stated in the tables (Par. 3.13) depending on the type of gas.

- By turning in a clockwise direction the heating potential increases and in an anti-clockwise direction it decreases.

• Adjustment of minimum heat output (Fig. 3-3). N.B.: only proceed after having calibrated the

nominal pressure. Adjustment of the minimum thermal input

is obtained by operating on the cross plastic screws (2) on the gas valve maintaining the brass nut blocked (3);

- disconnect the power supply to the modulating coil (just disconnect a faston); By turning the screw in a clockwise direction, the pressure increases, in an anti-clockwise direction it decreases. On completion of calibration, re-apply the power supply to the modulating coil. The pressure to which the water heater minimum power must be adjusted, must not be lower than that stated in the table (Par. 3.13) depending on the type of gas.

N.B.: to adjust the gas valve, remove the plastic cap (6); after adjusting, refit the cap.

3.7 PROGRAMMING THE P.C.B.The water heater is prepared for possible programming of several operation parameters. By modifying these parameters as described below, the water heater can be adapted according to specific needs.

To access the programming phase, proceed as follows:

- press keys (1) and (2) at the same time for approximately 10 seconds, keeping the selector (3) at minimum;

- using key (2), select the parameter to be changed indicated in the following table:

List of param-

etersDescription

P1 Solar delay timing

P2 Gas type selection

P3 Ignition power value

P4 Display lighting

- adjust the corresponding value consulting the following tables by turning the selector (3);

- confirm the value set by pressing the Reset button (2) for about 3 seconds.

The value flashes when it is memorised. N.B.: after a period of time, without touching

any keys, the operation cancels automatically.Solar delay timing.The water heater is set to switch-on immediately after a request for DHW In the case of coupling with a solar storage tank positioned upstream from the water heater, it is possible to compensate the distance between the storage tank and the water heater in order to allow the water to reach the water heater. Set the time necessary to verify that the water is hot enough (see par. Solar panels coupling)

Solar delay timing

Range of values which can be set Parameter

From 0 to 60 sec. (0 Standard setting) P1

Gas type selection. The setting of this function is used to adjust the water heater in order to function with LPG gas or Methane gas.

Gas type selection

Range of values which can be set Parameter

G Town gas (first family gas) LG (LPG) or nG (Methane) (nG Standard setting)

P2

Ignition power value. The water heater has electronic modulation that adapts the ignition power according to requirement.

Ignition power value

Range of values which can be set Parameter

from 0 % to 50 % (35 % Stand-ard setting) P3

Display lighting. Establishes the display lighting mode.

0 Off: the display is always off.1 Automatic: the display lights up when the water heater is used.2 On: The display is always lit up.

Display lighting

Range of values which can be set Parameter

0 - 1 - 2 (1 Standard setting) P4

3.8 AUTOMATIC SLOW IGNITION FUNCTION WITH TIMED RAMP DELIVERY.

In the ignition phase, the burner ignites at the "ignition power value" set (P3), after which, on the basis of the DHW withdrawal it carries out a gas supply increasing ramp (with pressure values that depend on the type of gas selected) with a pre-defined duration. This prevents every calibration or precision adjustment of the water heater ignition phase in any conditions of use.

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3.9 SOLAR FUNCTION.The solar function is always active.During a request for DHW, if the inlet temperature is the same as or higher than -3°C with respect to the value set, the water heater does not switch-on.Functioning is however shown on the display by the flashing of the relevant signal (4).

3.10 SOLAR PANELS COUPLING FUNCTION.

The water heater is set-up to receive pre-heated water from a system of solar panels up to a maximum temperature of 65°C. In all cases, it is always necessary to install a mixing vale on the hydraulic circuit upstream from the water heater on the cold water inlet.

Note: for good functioning of the water heater; the temperature selected on the mixing valve must be 5 °C greater with respect to the temperature selected on the water heater control panel.

In this condition, parameter P1 (solar delay timing) must be set at a temperature sufficient to receive water from a storage tank situated upstream from the water heater. The greater the distance from the storage tank, the longer the stand-by time to be set. When these regulations have been performed, when the water heater inlet water is at the same or greater temperature with respect to that set by the DHW selector switch, the water heater does not switch on.

3.11 YEARLY APPLIANCE CHECK AND MAINTENANCE.

The following checks and maintenance should be performed at least once a year.- Clean the flue side of the heat exchanger.- Clean the main burner.- Visually check the flue hood for deterioration

or corrosion.- Check correct lighting and operation.- Check correct burner calibration.- Check correct operation of control and

adjustment devices and in particular: - the intervention of the functioning selector

positioned on the water heater control panel; - domestic hot water control thermostat

intervention.- Check that the internal system is properly

sealed according to specifications.- Check the intervention of the device against no

gas ionisation flame control. Intervention time must be less than 10 seconds.

- Visually check for water leaks or oxidation from/on connections.

- Check visually that the safety and control devices have not been tampered with and/or

shorted, in particular: - temperature safety thermostat; - air pressure switch- Check the condition and integrity of the

electrical system and in particular: - electrical power cables must be inside the

whipping; - there must be no traces of blackening or

burning.

3-5

c

4

4

d

d

2a

3

1a

a1

1

1b

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3.12 CASING REMOVAL.To facilitate water heating maintenance the casing can be completely removed as follows: (Fig. 3-5):1) Loosen the lower screws (a) that fix the lower

protection grid (b) and the casing (c).2) Widen the casing (c) pulling the sides slightly

outwards.3) Pull the casing towards yourself in the lower

side.4) Push the casing upwards in a way to be able

to extract it from the upper hooks (d).

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3.13 VARIABLE HEAT POWER.N.B.: the pressures indicated in the table represent the difference in existing pressures between the gas valve outlet and the combustion chamber. The adjustments should therefore,be

carried out using a differential manometer (small "U"-shaped column or digital manometer) with the probes inserted in the pressure test gas valve outlet and on the sealed chamber positive pressure test. The power data in the table has been

obtained with intake-exhaust pipe measuring 0.5 m in length. Gas flow rates refer to heating power below a temperature of 15°C and at a pressure of 1013 mbar. Burner pressure values refer to use of gas at 15°C.

Caesar 14 3 E.

METHANE (G20) BUTANE (G30) PROPANE (G31)

HEAT OUTPUT

HEAT OUTPUT

BURNER GAS FLOW RATE

BURNER NOZZLES PRESSURE

BURNER GAS FLOW RATE

BURNER NOZZLES PRESSURE

BURNER GAS FLOW RATE

BURNER NOZZLES PRESSURE

(kW) (kcal/h) (m3/h) (mbar) (mm H2O) (kg/h) (mbar) (mm H2O) (kg/h) (mbar) (mm H2O)

24.4 20984 2.92 13,20 134,6 2.18 28.70 292.7 2.14 36.40 371.224.0 20640 2.87 12,84 130,9 2.15 28.04 286.0 2.11 35.49 361.923.0 19780 2.77 11,96 122,0 2.06 26.42 269.4 2.03 33.26 339.122.0 18920 2.66 11,12 113,4 1.98 24.83 253.2 1.95 31.09 317.021.0 18060 2.55 10,30 105,0 1.90 23.28 237.4 1.87 28.98 295.520.0 17200 2.44 9,51 96,9 1.82 21.75 221.8 1.79 26.94 274.719.0 16340 2.33 8,74 89,1 1.74 20.24 206.4 1.71 24.95 254.418.0 15480 2.22 8,00 81,6 1.66 18.76 191.3 1.63 23.01 234.617.0 14620 2.11 7,29 74,3 1.58 17.31 176.5 1.55 21.13 215.516.0 13760 2.00 6,60 67,3 1.49 15.87 161.8 1.47 19.30 196.815.0 12900 1.89 5,94 60,5 1.41 14.46 147.4 1.39 17.52 178.614.0 12040 1.78 5,30 54,0 1.33 13.06 133.2 1.31 15.79 161.013.0 11180 1.67 4,68 47,7 1.24 11.68 119.1 1.22 14.11 143.912.0 10320 1.55 4,09 41,7 1.16 10.32 105.3 1.14 12.47 127.211.0 9460 1.44 3,52 35,9 1.07 8.98 91.5 1.05 10.89 111.010.0 8600 1.32 2,98 30,3 0.98 7.65 78.0 0.97 9.35 95.49.0 7740 1.20 2,46 25,1 0.89 6.33 64.5 0.88 7.86 80.28.0 6880 1.08 1,97 20,0 0.80 5.03 51.3 0.79 6.43 65.57.0 6020 0.95 1,50 15,3 0.71 3.74 38.1 0.70 5.04 51.4

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3.14 COMBUSTION PARAMETERS.

Super Caesar 17 3 E.

METHANE (G20) BUTANE (G30) PROPANE (G31)

HEAT OUTPUT

HEAT OUTPUT

BURNER GAS FLOW RATE

BURNER NOZZLES PRESSURE

BURNER GAS FLOW RATE

BURNER NOZZLES PRESSURE

BURNER GAS FLOW RATE

BURNER NOZZLES PRESSURE

(kW) (kcal/h) (m3/h) (mbar) (mm H2O) (kg/h) (mbar) (mm H2O) (kg/h) (mbar) (mm H2O)

29.8 25628 3.56 12,50 127,5 2.66 28.50 290.6 2.62 36.60 373.229.0 24940 3.47 11,86 121,0 2.59 27.08 276.2 2.55 34.83 355.228.0 24080 3.36 11,10 113,2 2.50 25.37 258.7 2.46 32.70 333.427.0 23220 3.24 10,36 105,7 2.42 23.73 242.0 2.38 30.64 312.426.0 22360 3.13 9,66 98,5 2.33 22.15 225.9 2.30 28.66 292.325.0 21500 3.01 8,99 91,6 2.25 20.64 210.5 2.21 26.75 272.824.0 20640 2.90 8,34 85,0 2.17 19.19 195.7 2.13 24.92 254.123.0 19780 2.79 7,72 78,7 2.08 17.80 181.5 2.05 23.15 236.122.0 18920 2.68 7,13 72,7 2.00 16.46 167.8 1.97 21.45 218.721.0 18060 2.57 6,56 66,9 1.92 15.18 154.7 1.88 19.81 202.020.0 17200 2.46 6,02 61,4 1.83 13.95 142.2 1.80 18.23 185.919.0 16340 2.34 5,50 56,1 1.75 12.77 130.2 1.72 16.71 170.418.0 15480 2.23 5,01 51,1 1.67 11.64 118.7 1.64 15.24 155.417.0 14620 2.12 4,54 46,3 1.58 10.56 107.7 1.56 13.84 141.116.0 13760 2.01 4,10 41,8 1.50 9.54 97.2 1.47 12.49 127.315.0 12900 1.89 3,67 37,5 1.41 8.56 87.3 1.39 11.19 114.114.0 12040 1.78 3,27 33,4 1.33 7.63 77.8 1.31 9.95 101.513.0 11180 1.66 2,90 29,5 1.24 6.74 68.8 1.22 8.77 89.412.0 10320 1.55 2,54 25,9 1.15 5.91 60.3 1.14 7.63 77.811.0 9460 1.43 2,21 22,6 1.07 5.13 52.3 1.05 6.56 66.910.0 8600 1.31 1,91 19,5 0.98 4.39 44.8 0.96 5.53 56.49.0 7740 1.19 1,63 16,6 0.89 3.71 37.8 0.87 4.57 46.68.0 6880 1.07 1,37 14,0 0.80 3.08 31.4 0.78 3.66 37.37.7 6622 1.03 1,30 13,3 0.77 2.90 29.6 0.76 3.40 34.7

G20 G30 G31Caesar 14 3 EGas nozzle diameter mm 1.35 0.81 0.81Supply pressure mbar (mm H2O) 20 (204) 29 (296) 37 (377)Flue flow rate at nominal heat output kg/h 55 57 59Flue flow rate at min heat output kg/h 58 58 58CO2 at Nom Q./Min. % 7,20 / 2,10 8,10 / 2,42 7,64 / 2,40CO with 0% O2 at Nom Q /Min. ppm 70 / 145 78 / 174 40 / 172NOX with 0% O2 at Nom Q /Min. mg/kWh 177 / 109 200 / 60 220 / 75Flue temperature at nominal output °C 171 171 163Flue temperature at minimum output °C 113 113 113Super Caesar 17 3 EGas nozzle diameter mm 1.35 0.80 0.80Supply pressure mbar (mm H2O) 20 (204) 29 (296) 37 (377)Flue flow rate at nominal heat output kg/h 71 69 71Flue flow rate at min heat output kg/h 76 72 79CO2 at Nom Q./Min. % 6,80 / 1,70 8,11 / 2,10 7,85 / 1,91CO with 0% O2 at Nom Q /Min. ppm 40 / 190 75 / 234 54 / 223NOX with 0% O2 at Nom Q /Min. mg/kWh 135 / 107 210 / 65 230 / 90Flue temperature at nominal output °C 157 164 161Flue temperature at minimum output °C 92 97 90

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- Flue temperature values refer to an air inlet temperature of 15°C.

- The data relevant to domestic hot water performance refer to a dynamic inlet pressure of 2 bar and an inlet temperature of 15°C; the values are measured directly at the water heater outlet considering that, to obtain the data declared, mixing with cold water is necessary.

- The max. sound level emitted during water heater operation is < 55dBA. The sound level value is referred to semianechoic chamber tests with water heater operating at max. heat output, with extension of flue gas exhaust system according to product standards.

3.15 TECHNICAL DATA.

Caesar 14 3 E Super Caesar 17 3 ENominal heat input kW (kcal/h) 27.6 (23711) 33.7 (28958)Minimum heat input kW (kcal/h) 9.0 (7748) 9.7 (8382)Nominal heat output (useful) kW (kcal/h) 24.4 (20984) 29.8 (25628)Minimum heat output (useful) kW (kcal/h) 7.0 (6020) 7.7 (6622)Efficiency at nominal heat output % 88.5 88.5Heat loss at case with burner On % 2.0 2.4Heat loss at flue with burner On % 9.5 9.1Water content in generator l 1.0 1.0Domestic hot water adjustable temperature °C 40 - 60 40 - 60Domestic hot water circuit flow limiter at 2 bar l/min 9.5 10.0Min. pressure (dynamic) burner ON (in ascent) bar 0.25 0.25Min. pressure (dynamic) burner ON (in descent) bar 0.20 0.20Min. flow rate (dynamic) burner ON (in ascent) l/min 2.5 2.5Min. flow rate (dynamic) burner ON (in descent) l/min 2.0 2.0Domestic hot water circuit max. working pressure bar 10.0 10.0Withdrawal capacity in continuous service (ΔT 25 °C) in mixing mode l/min 14.0 17.0Drawing capacity in continuous duty (ΔT 50 °C) l/min 7.0 8.5Full water heater weight kg 23.0 23.0Empty water heater weight kg 22.0 22.0Electrical connection V/Hz 230 / 50 230 / 50Power input A 0,40 0,55Installed electric power W 50 70Fan consumption W 29,2 54,5Equipment electrical system protection - IPX5D IPX5DType of appliance C12 /C32 / C42 / C52 / C82 / B22 / B32Category II2H3+

immergas.com

Immergas S.p.A.42041 Brescello (RE) - ItalyT. +39.0522.689011F. +39.0522.680617

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