Fondital Tahiti Dual hc Guía de inicio rápido

INSTALLATION,

USE AND MAINTENANCE

TAHITI DUAL

HC - HR

MADE IN ITALY

High quality

Italian product

Gas ﬁred wall Mounted condensing boiler

Tahiti Dual 24 - 32 kW Combi (HC)

Tahiti Dual 24 - 32 kW Regular (HR)

Natural Gas

Fondital Tahiti Dual HC 24 kW Line Combi (HC)

G.C.N° 47 309 04

Fondital Tahiti Dual HR 24 kW Line Regular (HR)

G.C.N° 47 309 05

Fondital Tahiti Dual HC 32 kW Line Combi (HC)

G.C.N° xx xxx xx

Fondital Tahiti Dual HR 32 kW Line Regular (HR)

G.C.N° xx xxx xx

Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the

correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer’s instructions by

competent persons and that it meets the requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to

demonstrate compliance with Building Regulations and should be provided to the customer for future reference.

Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of Practice

which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme.

Visit www.centralheating.co.uk for more information.

Dear Customer,

Thank You for choosing and buying one of our boilers.

Please read these instructions carefully in order to properly install, operate, and maintain the equipment.

1. General information for ﬁtters, maintenance technicians and users

1.1. General warnings

This INSTRUCTION MANUAL, which is an integral and indispensable part of the product, must be handed over to the user by the in-

staller and must be kept in a safe place for future reference. The manual must accompany the boiler should it be sold or its possession

transferred. Following to the boiler installation, the tter is to advise the user about boiler operation and its safety devices. This Manual

must be left along with the Benchmark commissioning booklet with the boiler as Regulation 29 of the HSC Gas safety (installation and

use) Regulations 1998.

This boiler is designed for connection to a domestic heating or hot water system.

Any other use is deemed as improper and as such dangerous. Under no circumstances will the manufacturer be held

responsible for damage or injury to persons or animals caused by errors in the installation and/or use of the appliance,

or through non-compliance with current local and national standards and/or the manufacturer’s instructions.

The boiler must be installed by qualied personnel, in compliance with applicable laws and standards and according to the

manufacturer’s instructions given in this manual.

In GB, the installation must be carried out by a Registered Installer. To check for authorised qualied engineers please contact

CORGI 01256 372400. It must be carried out in accordance with the relevant requirements of the:

• GasSafetyRegulations;

• TheappropriateBuildingRegulationseitherTheBuildingRegulation,TheBuildingRegulations(Scotland),BuildingRegulations 

 (NorthernIreland);

• TheWaterFittingsRegulationsorWaterBylawsinScotland;

• ThecurrentI.E.E.WiringRegulations.

Wherenospecicinstructionsaregiven,referenceshouldbemadetotherelevantBritishStandardsCodeofPractice.

InIE,theinstallationmustbecarriedoutbyacompetentPersonandinstalledinaccordancewiththecurrenteditionofI.E.813

“DomesticGasInstallations”,thecurrentBuildingRegulationsandreferenceshouldbemadetothecurrentETCIrulesforelectrical

installations.

The commissioning of the boiler and any subsequent works carried out on the appliance must be effected by an appropriately qualied

technician or an approved Fondital Helpline Service Centre.

Damage and/or injury caused by incorrect installation or use and/or damage and/or injury due to non-observance of the manufacturer’s

instructions shall relieve the manufacturer from any and all contractual and extra-contractual liability.

Before installing the boiler, check that the technical data correspond to the requirements for its correct use in the system.

Check that the boiler is intact and it has not been damaged during transport and handling: do not install equipment which is damaged

and/or faulty. In case of doubt, do not attempt 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 a potential

hazard and must be disposed of in a responsible manner.

Do not obstruct the air intake or ue exhaust grills and terminals.

Only manufacturer approved and supplied accessories or optional kits (including electric ones) are to be installed.

Properly dispose of the packaging as all the materials can be recycled. The packaging must therefore be sent to specic waste

management sites.

In the event of failure and/or malfunction, shut down the system. Do not interfere with or attempt any repairs. Call for professionally

qualied technical assistance only. Fondital helpline UK 08700 34 8820.

Any warranty repairs to the appliance must be carried out exclusively by the manufacturer’s authorised service centre using original

spare parts. Non-observance of the above requirements may affect the safety of the boilers and endanger people, animals and property.

The manufacturer, in order to guarantee efcient and correct functioning of the equipment, recommends the boiler to be serviced and

repaired by an authorized Service Centre which is best trained for the purpose.

Before carrying out any cleaning or maintenance operations, disconnect the appliance from the mains electricity supply by switching off

at the main switch and/or any other isolating device.

Routine boiler maintenance is to be performed according to the schedule indicated in the relevant section of this

manual. Appropriate boiler maintenance ensures efﬁcient operation, environment preservation, and safety for people,

animals and objects.

Intheeventoflongperiodsofinactivityoftheboiler,disconnectitfrompowermainsandclosethegastap.Warning!

Whenpowermainsaredisconnected,boilerelectronicanti-freezefunctionwillnotbeoperative.

Shouldtherebeariskoffreezing,addanti-freeze:itisnotadvisabletoemptythesystemasthismayresultindamage;usespecic

anti-freeze products suitable for multi-metal heating systems.

Should you smell gas:

- do not turn on or off electric switches and do not turn on electric appliances;

- do not ignite ﬂames and do not smoke;

- close the main gas tap;

- open doors and windows;

- contact a Service Centre, a qualiﬁed installer or the gas supply company.

Never use ﬂames to detect gas leaks.

NATIONAL GRID GAS EMERGENCY 0800 111 999

The boiler is designed for installation in the country indicated on the technical data plate: installation in any other

country may be source of danger for people, animals and objects.

The “operating instructions” of this manual must be read carefully as it provides information on the operating and the operating limits of

the appliance.

This appliance must be used exclusively in an un-vented central heating system.

The warnings contained in this chapter have been written for the appliance user, the installer and the service engineer.

1.2. Product conformity

FONDITAL S.p.a. declare that all its products are manufactured to a high specication and in compliace with the relevant standards.

AllFONDITALboilersareCEcertiedandpossesstechnicalandfunctionalcharacteristicsthatcomplywiththefollowing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CONDENSINGBOILERSWITHNOMINAL

HEATINPUT≤70kW

Gas red boilers also comply with the following directives:

GASAPPLIANCESDIRECTIVE90/396CEEforCEcompliance

LOWVOLTAGEDIRECTIVE2006/95CE

BOILEREFFICIENCYDIRECTIVE92/42CE

ELECTROMAGNETICCOMPATIBILITYDIRECTIVE89/336CE

The materials used such a copper, brass, stainless steel, etc. form a compact, homogeneous, highly functional unit that is easy to install

and simple to operate. In its simplicity, the wall-mounted appliance is equipped with all the appropriate accessories required to make it a

fully independent boiler capable of satisfying domestic hot water production and central heating needs. All boilers are fully inspected and

are accompanied by a quality certicate, signed by the inspector, and a guarantee certicate. This manual must be kept in a safe place

and must accompany the boiler at all times.

FONDITAL S.p.a. will not be held responsible for any misinterpretation of this manual resulting from the inaccurate translation of

same.

FONDITAL S.p.a. will not be held responsible for the consequences in the case of non observance of the instructions contained

in this manual or in the case where actions not speciﬁcally described herein are undertaken.

FONDITAL S.p.a. declare that no substances harmful to health are contained in the appliance or used during appliance

manufacture and have not used or intend to use any of the following substances in the manufacture of Fondital heating

products:

- Asbestos

- Mercury

- CFC’s

It is a condition of the manufacturers warranty that the Benchmark Commissioning Checklist is fully

completed and left with the appliance.

CONTEST

1.General information for ﬁtters, maintenance technicians and users pag. 4

1.1. General warnings pag. 4

1.2. Product conformity pag. 5

2.Instructions for the user pag. 7

2.1 Control panel pag. 7

2.2 Operating the boiler pag. 9

2.2.1. Switching on pag. 9

2.2.2. CH function pag. 9

 2.2.3.DHWfunction pag. 10

 2.2.4.ANTI-FREEZEfunction pag. 10

 2.2.5.PUMPANDTHREE-WAYVALVEANTI-SEIZEFUNCTION pag. 10

 2.2.6.Externalprobeoperation(optionalequipment) pag. 10

2.3.Boiler lockout pag. 11

2.3.1. Burner lockout pag. 11

2.3.2. Shut-down due to overheating pag. 11

2.3.3. Shut-down due to inadequate air/ue gas draught pag. 11

2.3.4. Shut-down due to low water pressure pag. 12

2.3.5. Shut-down due to temperature probe malfunction pag. 12

2.4. Maintenance pag. 12

2.5. Notes for the user pag. 12

3. Technical characteristics and dimensions pag. 13

3.1. Dimensions pag. 14

3.2. Layout pag. 15

3.3. Operating data pag. 16

3.4. General characteristics pag. 16

4.Instructions for the ﬁtter pag. 17

4.1. Reference standard pag. 17

4.2. System details pag. 18

4.2.1. Central heating circuit pag. 18

4.2.2. Filling the central heating system pag. 18

4.2.3. Domestic hot water circuit pag. 19

4.3. Site requirements pag. 19

4.3.1. Choosing where to install the boiler pag. 19

4.3.2. Positioning the boiler pag. 19

4.3.3. Boiler room ventilation pag. 21

4.3.4. Flue pag. 21

4.4. Installation (authorised personnel) pag. 22

4.4.1. Packaging pag. 22

4.4.2. Installing the boiler pag. 22

4.4.3. Gas main connection pag. 22

4.4.4. Hydraulic connections pag. 23

4.4.5. Adjustable by-pass pag. 25

4.5. Flue options pag. 25

4.5.1. Air intake/ue gas discharge system pag. 25

4.5.2. Conguration of air/ue system pipes pag. 26

4.5.3. Ø 100/60 mm air/ue gas coaxial duct system pag. 27

4.5.4. Ø 80 mm air/ue gas split duct system pag. 28

 4.5.5.Electricalsupplyconnection pag. 31

4.5.6. Room thermostat connection (optional equipment) pag. 31

 4.5.7.Externaltemperatureprobeinstallation(optionalequipment)and“slidingtemperature”operation pag. 31

 4.5.8.InstallationoftheOPENTHERMremotecontrol(optionalequipmentonlyforHRmodel) pag. 33

4.5.9. Loading the system pag. 33

4.6. Burner adjustment pag. 34

5.Commissioning pag. 35

5.1. Commissioning the boiler pag. 35

5.2. Setting the timer pag. 35

5.3. Checking pag. 35

5.4. Switching on and switching off pag. 35

6. Servicing pag. 36

6.1. General warnings pag. 36

6.2. Boiler inspection pag. 36

6.3. Servicing schedule pag. 36

6.4. Analysis of combustion parameters pag. 36

6.5. Testing combustion efciency pag. 37

6.5.1. “Chimney sweep” function pag. 37

6.5.2. Measurements pag. 37

 6.6. Wiringdiagram pag. 38

6.7 Hydraulic loss pag. 39

7. Spare part list pag. 40

8.Troubleshooting pag. 44

Benchmark Commissioning checklist pag. 46

2. Instructions for the user

Fondital is a licensed member of the Benchmark Scheme which aims to improve the standards of installation and commissioning of

domestic heating and hot water systems in the UK and to encourage regular servicing to optimise safety, efciency and performance.

Benchmark is managed and promoted by the Heating and Hotwater Industry Council.

For more information visit www.centralheating.co.uk

Please ensure that the installer has fully completed the Benchmark Checklist on the inside back pages of the installation instructions

supplied with the product and that you have signed it to say that you have received a full and clear explanation of its operation. The

installer is legally required to complete a commissioning checklist as a means of complying with the appropriate Building Regulations

(EnglandandWales).

All installations must be notied to Local Area Building Control either directly or through a Competent Persons Scheme. A Building Regu-

lations Compliace Certicate will then be issued to the customer who should, on receipt, write the Notication Number on the Bench-

mark Checklist.

This product should be serviced regularly to optimise its safety, efciency and performance. The service engineer should complete the

relevant Service Record on the Benchmark Checklist after each service.

The Benchmark Checklist may be required in the event of any warranty work and as supporting documentation relating to home im-

provements in the optional documents section of the Home Information Pack.

2.1. Control panel

1. Power mains connection light (green)

This light indicates that the power supply to the boiler is on.

2. Indicator light (red)

Whenthislightison,itmeansthetemperatureofthewaterintheheatingsystemisbetween25°Cand35°C.

Whenthislightisashing,itmeanstheboilerhasshutdownduetoamalfunction.

3. Indicator light (red)

Whenthislightison,itmeansthetemperatureofthewaterintheheatingsystemisbetween36°Cand45°C.Whenthislightisashing,

it means the boiler’s safety thermostat has shut the boiler down.

4. Indicator light (red)

Whenthislightison,itmeansthetemperatureofthewaterintheheatingsystemisbetween46°Cand55°C.

Whenthislightisashing,itmeansthereisafaultintheairintakeand/oruedischargepiping.

5. Indicator light (red)

Whenthislightison,itmeansthetemperatureofthewaterintheheatingsystemisbetween56°Cand65°C.

Whenthislightisashing,itmeanstheburnerhasshutdown.

6. Indicator light (red)

Whenthislightison,itmeansthetemperatureofthewaterintheheatingsystemisbetween66°Cand75°C.

Whenthislightisashing,itmeansthewaterpressureintheboileristoolow.

7. Indicator light (red)

Whenthislightison,itmeansthetemperatureofthewaterintheheatingsystemisbetween76°Cand85°C.

Whenthislightisashing,itmeanstheCHtemperatureisabove85°C.

8. Indicator light (yellow)

Whenthislightison,itmeanstheameispresentontheburner.

Whenthislightisashing,itmeanstheboilerhasshutdownduetoamalfunction.

pic. 1

5 9 10 11 121 2 3 6 7 84

12. Time clock

The time clock is for central heating control only. The clock is provided with a selector switch with three positions:

a) Position “I” CONSTANT: in this position, the clock circuit is always closed (switch on), therefore the boiler will constantly on and

 willonlyshutoffupontherequestoftheroomthermostat(ifinstalled)ortheheatingthermostat;

b) Position “O”HEATINGOFF:inthisposition,theclockcircuitisalwaysopen(switchoff)andtheboilerwillthereforenever 

 igniterforheating,Domestichotwaterwilloperateondemand;

c) “Central” positionPROGRAMMINGACTIVE:inthisposition,theprogrammingsetbytheuserisactive.

Using the three position switch the timer will allow either constant operation, timed operation or central heating off. Move the switch

bottom by sliding to the desired position.

The time clock is provided with 72 switches, each of which cover a time interval of 20 minutes (three per hour).

Whenariderisswitchedfromtheoutside(onsetting)totheinsideoftheclockborder(offsetting),

the circuit is open (switch off) for a period of 20 minutes and then the boiler stops.

For set the time of day, turn the timer outer bezel clockwise, to align the pointer with the correct

time to the nearest 20 minutes. Do not at any time attempt to turn the bezel anti-clockwise.

For set the timed heating program, decide which times of the day the central heating is required.

The heating will operate when the green tappets are set to the outer edge of the bezel.

To ensure the heating stays OFF set the required tappets inwards towards the centre of the bezel.

ON OFF

Tapped position

9. Boiler mode

WhentheknobisintheOFFpositiontheboilerisinstand-bymode.

WhentheknobisintheSUMMERposition ,theboilersuppliesDHWonly.

WhentheknobisintheWINTERposition ,theboilersuppliesbothCHandDHW.

WhentheknobisintheANTI-FREEZEposition , only the boiler anti-freeze function is active.

WhentheknobisturnedtotheRESETpositionandback , the boiler resumes operation.

10. DHW temperature regulator

ThisknobisusedtosettheDHWtemperaturewithintherange35-57°C

WARNING

Theboilerhasaspecialbuilt-inregulatorthatlimitsDHWowupto10litresperminute.InadditiontotheDHWtemperaturesetonthis

regulator,theDHWtemperaturealsodependsontheamountofwaterrequestedbytheuserandthesupplytemperature.

11. CH temperature adjustment

This knob is used to set the temperature of the water in the heating system. The setting range is 35 - 78°C.

2.2. Operating the boiler

2.2.1. Switching on

These instructions presuppose that the boiler has been installed by an authorized ﬁtter, started up for the ﬁrst time and

set up for correct operation.

•Openthegasstopcock.

•Connecttheboilertothemainspowersupply(LIGHT 1 on the control panel comes on).

•Chooseboilermodebyoperatingthe“OFF/SUMMER/WINTER/ANTI-FREEZE”selector(9).

•TurntheCHtemperatureadjustmentknob(11) to set the temperature required for the heating system.

•TurntheDHWtemperatureknob(10)tosetthetemperaturerequiredfortheDHW(HC).

•Setdesiredroomtemperaturebymeansoftheroomthermostatinthepremises(whenavailable).

WARNING: If the boiler is not used for a long time, particularly if it runs on LPG, ignition may be difﬁcult.

Before operating the boiler, switch on another gas-powered device (e.g. kitchen range or oven). Be aware that even if this

procedure is followed, the boiler may still experience some starting difﬁculties and shut down once or twice.

Reset the boiler by operating knob (9), then turn the knob back to the required position. Allow three minutes between each

attempt to re-light the boiler.

2.2.2. CH function

Use the regulation knob (11, pic. 1) to set the temperature in the central heating system.

The temperature setting range is 35-78°C (from the counter-clockwise limit position to the time limit position).

The CH temperature can be read from lights 2÷7 (pic. 1) on the control panel.

To prevent frequent ignition and switching off in heating mode, the boiler has a 4-minute waiting time between subsequent ignitions.

If the water temperature in the system fall below 40°C, waiting procedure is aborted and the boiler re-ignites (Antifast function).

COLOUR DISPLAY ACCORDING TO BOILER STATUS

Regular working LIGHT 1 LIGHT 2 LIGHT 3 LIGHT 4 LIGHT 5 LIGHT 6 LIGHT 7 LIGHT 8

Power connected to boiler GREEN n/a n/a n/a n/a n/a n/a n/a

Burner on GREEN n/a n/a n/a n/a n/a n/a YELLOW

CH temperature < 25°C GREEN OFF OFF OFF OFF OFF OFF n/a

26°C < CH temperature < 35°C GREEN RED OFF OFF OFF OFF OFF n/a

36°C < CH temperature < 45°C GREEN OFF RED OFF OFF OFF OFF n/a

46°C < CH temperature < 55°C GREEN OFF OFF RED OFF OFF OFF n/a

56°C < CH temperature < 65°C GREEN OFF OFF OFF RED OFF OFF n/a

66°C < CH temperature < 75°C GREEN OFF OFF OFF OFF RED OFF n/a

76°C < CH temperature < 85°C GREEN OFF OFF OFF OFF OFF RED n/a

Table 1 - Colour displayed by Light in relation to boiler operation status

Malfunctions LIGHT 1 LIGHT 2 LIGHT 3 LIGHT 4 LIGHT 5 LIGHT 6 LIGHT 7 LIGHT 8

Power is missing OFF OFF OFF OFF OFF OFF OFF OFF

Safety thermostat shutdown GREEN OFF RED L OFF OFF OFF OFF OFF

Air/ﬂue gas pressure switch

shutdown

GREEN OFF OFF RED L OFF OFF OFF OFF

Shutdown due to ﬂame absence GREEN OFF OFF OFF RED L OFF OFF OFF

Water pressure switch shutdown GREEN OFF OFF OFF OFF RED L OFF OFF

Gas valve alarm GREEN OFF RED L OFF OFF OFF OFF YELLOW L

Water temperature switch alarm (>85°C) GREEN OFF OFF OFF OFF OFF RED L OFF

DHW ﬂow probe alarm GREEN RED L OFF OFF OFF OFF OFF OFF

CH ﬂow probe alarm GREEN RED L OFF OFF OFF OFF OFF YELLOW L

External cylinder probe alarm GREEN RED LA OFF OFF OFF OFF OFF YELLOW LA

Remote control malfunction GREEN OFF OFF RED L OFF OFF OFF YELLOW L

Table 2- Colour displayed by Light in relation to boiler malfunction status

KEY TO ACRONY

OFF LIGHT off

RED    LIGHTon,displayingthecolourshownonthetable

LRED    LIGHTorlightsashing,displayingthecolourshownonthetable

LARED    LIGHTSashing,displayinginsequencethecoloursshownonthetable

n/a LIGHT status not relevant

2.2.3. DHW function

The domestic hot water supply function is active on model HC, and on model HR with an (optional) external water heater. This function

always has priority over central heating water.

For model HC, the temperature setting range is 35-57°C (from the counter-clockwise limit position to the time limit of regulation knob 10).

FormodelHRwithan(optional)externalwaterheaterwithanNTCprobe(10kΩ@ß=3435;refertothewaterheaterspecications),the

temperature setting range is 35-57°C (from the counter-clockwise limit position to the time limit of regulation knob 10).

FormodelHRwithan(optional)externalwaterheaterwiththermostatprobe,thedesiredDHWtemperaturemustbesetonthewater

heater (refer to the attached instructions). Regulation knob 10 has no effect on this conguration.

Theboileristtedwithaow-limitingdevicethatallowsamaximumDHWowof10litresperminute.

TheDHWowratedependsontheboiler’sthermalcapacityandthemainswatersupplytemperature,andcanbecalculatedfromthe

following formula:

l=DHWliterperminute=--------

∆ T

K represents:

349 (HC 24)

434 (HC 32)

ΔT=DHWtemperature–mainswatersupplytemperature.

E.g.InmodelHC24,ifthemainswatersupplytemperatureis8°CandDHWisrequiredat38°C,thevalueofΔTis:

ΔT=38°C–8°C=30°C

andDHWlitres(lperminute)availableattherequiredtemperatureof38°Cis

I = 349 / 30 = 11.7 [litres per minute - mixed water to the tap].

2.2.4. ANTI-FREEZE FUNCTION

Thisboileristtedwithananti-freezeprotectionsystem,whichworkswhenthefollowingfunctionsareactivated:SUMMER,WINTER

andANTI-FREEZE.

The anti-freeze function only protects the boiler, not the whole heating system. The heating system must be protected

using a room thermostat, although this is disabled when the selector is set to the ANTI-FREEZE or OFF mode.

Therefore, if you want to protect both the boiler and the system, turn to WINTER mode on selector 9.

Whentheheatingwatertemperaturesensordetectsawatertemperatureof5°C,theboilerswitchesonandstaysonatitsminimum

thermal power until the temperature reaches 30°C or 15 minutes have elapsed. The pump continues to operate even if the boiler shuts

down.

InmodelHC,anti-freezefunctionalsoprotectstheDHWcircuit.

WhentheDHWtemperaturesensordetectsatemperatureof5°C,theboilerswitchesonandstaysonatitsminimumthermalpower

untilthetemperaturereaches10°Cor15minuteshaveelapsed(thedeviatingvalveisintheDHWposition).Thepumpcontinuesto

operate even if the boiler shuts down.

In boilers with an external heater for the supply of domestic hot water, which have a thermostat-type temperature sensor, the anti-freeze

function does NOT protect the water heater. It can be protected by setting the boiler to Summer orWinter , or by setting a

value above 0°C on the water heater thermostat.

In CH boilers with an external water heater for the supply of domestic hot water, which have an NTC temperature sensor (10 kΩ @

ß=3435;refertotheboilerspecications),theanti-freezefunctionprotectsthewaterheateraswell.

Whentheexternalcylindertemperaturesensordetectsawatertemperatureof5°C,theboilerswitchesonandstaysonatitsminimum

thermal power until the temperature of the water in the external cylinder reaches 10°C or 15 minutes have elapsed. The pump continues

to operate even if the boiler shuts down.

The CH system can be protected effectively against freezing by means of specic anti-freeze additives suitable for use in multi-metal

systems.

Do not use car engine anti-freeze products, and periodically check the effectiveness of the anti-freeze product.

2.2.5. PUMP AND THREE-WAY VALVE ANTI-SEIZE FUNCTION

Wheretheboileristoremaininactiveand:

- no. 9selectorisnotsettotheOFFposition;

- boilerisnotdisconnectedfromelectricmainpowersupply;

the circulation pump (for all models) and three-way valve (HC model), are operated for 30 second every 24 hours in order to prevent the

components from seizing.

2.2.6. External probe operation (optional equipment)

The boiler can be equipped with an (optional) external temperature probe, by means of which the boiler adjusts the CH water

temperature according to the outdoor temperature, in other words, increasing the CH water temperature when the outdoor temperature

decreases, and vice-versa. This increases energy-saving operation (this boiler mode is called “sliding temperature operation”).

Este manual sirve para los siguientes modelos

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