DOMUSA TEKNIK Fusion Hybrid Oil User manual

INSTALLATION AND OPERATING INSTRUCTIONS
FUSION HYBRID OIL MODULE

Thank you for choosing a DOMUSA TEKNIK heating boiler. You have
chosen the Fusion Hybrid Oil model from the DOMUSA
TEKNIKproduct line. This is a hydraulic module for the “all-in-one”
storage of domestic hot water and heating support, which in
combination with a DUAL CLIMA heat pump is capable of providing
the appropriate comfort level for your home, always accompanied by
an adequate hydraulic installation and fuelled by diesel. You can also
enjoybalancedandeconomicaldomestichotwater.
This document constitutes an essential part of the product and must
be delivered to the end user. Please carefully read the warnings and
advice contained in this manual, as they provide important
information regarding the safety of the installation, as well as use and
maintenance.
These boilers must be installed by qualified personnel only, in
accordance with the legislation in force and following the
manufacturer'sinstructions.
Start-up of these boilers and anymaintenance operations must only be
carried out by DOMUSA TEKNIK’s Authorised Technical Assistance
Services.
Incorrect installation of these boilers could result in damage to people,
animals or property, and the manufacturer will hold no liability in such
cases.
DOMUSA TEKNIK, in compliance with item 1 of the first additional
provision of Act 11/1997, hereby informs that the person in charge of
delivering the container waste or used container, for its correct
environmental management, will be the final holder of the product
(Article 18.1 of Royal Decree 782/1998). At the end of its useful life, the
product must be taken to a selected collection point for electrical and
electronic equipment or must be returned to the distributor at the
time of purchasing a new equivalent appliance. For more detailed
information on the collection diagrams available, please contact either
the collection facilities of the local authority or the distributor where
thepurchasewasmade.

1
CONTENTS Page
1SAFETY WARNINGS.....................................................................................................................................................3
1.1SAFETY SYMBOLS..................................................................................................................................................................................3
1.2OTHER SYMBOLS ..................................................................................................................................................................................3
1.3SAFETY WARNINGS...............................................................................................................................................................................3
1.4GENERAL INSTALLATION GUIDELINES.................................................................................................................................................4
2LISTOFCOMPONENTS.....................................................................................................................................................5
3CONTROLCOMPONENTS................................................................................................................................................6
4INSTALLATIONINSTRUCTIONS.....................................................................................................................................7
4.1LOCATION.............................................................................................................................................................................................7
4.2COMBUSTION PRODUCT REMOVAL.....................................................................................................................................................7
4.3HYDRAULIC INSTALLATION OF THE HEATING AND DHWCIRCUIT....................................................................................................7
4.4HYDRAULIC INSTALLATION OF A SUPPORT PUMP (C4).....................................................................................................................8
4.5ELECTRICAL CONNECTIONS..................................................................................................................................................................9
4.6ASSEMBLY OF THE DHWPROBE.......................................................................................................................................................11
4.7ASSEMBLY AND CONNECTION OF THE CONTROL PANEL .................................................................................................................12
4.8CONFIGURING THE HEAT PUMP........................................................................................................................................................13
5 STARTING UP THEBOILER............................................................................................................................................14
5.1PRIOR WARNINGS ...............................................................................................................................................................................14
5.2FILLING THE DOMESTIC HOT WATER TANK........................................................................................................................................14
5.3FILLING THE HEATING CIRCUIT...........................................................................................................................................................14
5.4ELECTRICAL CONNECTION..................................................................................................................................................................14
5.5CONNECTING THE ROOM THERMOSTAT (“AUTO”MODE).............................................................................................................15
5.6START-UP............................................................................................................................................................................................18
5.7INSTALLATION HAND-OVER...............................................................................................................................................................19
6OPERATION........................................................................................................................................................................ 20
6.1SWITCHING ON THE MODULE ............................................................................................................................................................20
6.2OPERATION IN “AUTO”MODE ...........................................................................................................................................................20
6.3OPERATION WITH THE DHWSELECTOR
(23) ..................................................................................................................................21
6.4OPERATION WITH THE HEATING SELECTOR
(22) .............................................................................................................................21
6.5OPERATION WITH ROOM THERMOSTAT............................................................................................................................................22
7 HEATING CIRCUITADJUSTMENT...............................................................................................................................22
7.1ADJUSTMENT OF THE MAXIMUM BOILER SETPOINT TEMPERATURE................................................................................................22
8DRAINAGE..........................................................................................................................................................................22
9 SAFETY INTERLOCKS......................................................................................................................................................23
9.1TEMPERATURE SAFETY INTERLOCK....................................................................................................................................................23
9.2BURNER INTERLOCK............................................................................................................................................................................23
10MODULEMAINTENANCE...........................................................................................................................................23
10.1CLEANING THE BOILER.....................................................................................................................................................................23
10.2ANTI-FROST PROTECTION................................................................................................................................................................23
10.3CHARACTERISTICS OF THE WATER ..................................................................................................................................................23
11COMBUSTIONADJUSTMENT.................................................................................................................................... 24
12CHARACTERISTICSOFTHECIRCULATINGPUMP..............................................................................................25
12.1CHARACTERISTICS OF THE SCPUMP ..............................................................................................................................................25
12.2SYMBOLS..........................................................................................................................................................................................25
12.3ADJUSTMENT MODES......................................................................................................................................................................26
12.4FUNCTIONS.......................................................................................................................................................................................27
12.5LOAD LOSSES...................................................................................................................................................................................29
13DIAGRAMSANDMEASUREMENTS.........................................................................................................................30
14TECHNICALCHARACTERISTICS................................................................................................................................ 31
15ELECTRICAL DIAGRAM................................................................................................................................................33

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16BURNER.............................................................................................................................................................................35
16.1ASSEMBLY.........................................................................................................................................................................................35
16.2BURNER START-UP...........................................................................................................................................................................35
16.3ADJUSTMENT ...................................................................................................................................................................................35
16.4PRIMARY AIR ADJUSTMENT .............................................................................................................................................................35
16.5COMBUSTION LINE ADJUSTMENT ...................................................................................................................................................36
16.6CORRECT POSITION OF ELECTRODES..............................................................................................................................................36
16.7OIL PRESSURE ADJUSTMENT ...........................................................................................................................................................36
16.8TECHNICAL SPECIFICATIONS ...........................................................................................................................................................37
16.9RECOMMENDED NOZZLE AND PUMP PRESSURE............................................................................................................................37
16.10OIL SUPPLY PIPING DIAGRAMS .....................................................................................................................................................37
16.11ELECTRICAL DIAGRAMS.................................................................................................................................................................38
16.12ELECTRICAL DIAGRAMS.................................................................................................................................................................39
16.13BURNER OPERATING SEQUENCE...................................................................................................................................................39
16.14BURNER ERROR CODE....................................................................................................................................................................40
17SPARESLIST....................................................................................................................................................................41

3
1SAFETYWARNINGS
1.1 Safetysymbols
All safety messages indicate a potential risk of breakdown or damage. Follow the instructions
carefully to prevent accident or damage.
DANGER
This symbol warns of operations or situations involving imminent danger and which could
causeseveredamageorevendeath if they are not avoided.
WARNING
This symbol is for warnings to be taken into account for correct use of the appliance and to
prevent malfunctioning that could give rise to hazardous situations for the appliance itself and
forpersons.
CAUTION
This symbol warns of operations or situations involving imminent danger which could cause
slightormoderatedamageif they are not avoided.
1.2 Othersymbols
The following symbols are used in the instructions to drawyourattentiontoimportantinformation.
Thisindicatesariskofbreakdown and damage to personsand/or property.
This indicates important additional information related to the correct operation of the
module.
1.3 Safety warnings
DANGER
When working on the system
Be sure to disconnect both the module and the heat pump from the power supply. To do this,
the main network supply can be disconnected by checking that both the support module and
theheatpumparecompletelydisconnected.

FusionHybridOil
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1.4 General installationguidelines
DOMUSA TENIK ensures that this product contains no harmful substances and that no harmful
materialshavebeenused in itsmanufacture.
Please carefully read this instruction manual and keep it in a safe, easily accessible place. DOMUSA
TEKNIK shall not be held liable for any damage that may occur due to failure to follow these
instructions.
The Fusion Hybrid Oil module can only be installed in combination with a heat pump from the
DUAL CLIMA line from DOMUSA TEKNIK. The FUSION module, in combination with a DUAL CLIMA
heat pump, is suitable for use in both heating and cooling installations, and can be combined with
fan coils, underfloor heating/cooling and low-temperature radiators. It should be connected to a
heating/cooling system and to a hot water distribution network that is compatible with its
performance and power.
This appliance should only be used for the purpose for which it has been expressly designed. Any
other use is considered unsuitable and therefore hazardous. The manufacturer shall not be
considered liable under any circumstances for damage caused by unsuitable, erroneous or
improperuse.
Improper installation or placement of equipment or accessories may cause electrocution, short
circuit, leakage, fire, or other damage to the equipment. Use only accessories or optional
equipment manufactured by DOMUSA TEKNIK and specifically designed to work with the products
presented in this manual. Do not modify, replace or disconnect any safety or control device without
first consulting the manufacturer or the Official Technical Assistance ServiceofDOMUSATEKNIK.
Current legislation must be taken into account on installing this appliance, and it must be installed
inaplacewithsuitableventilation.
The module must be installed by an installer authorized by the Ministry of Industry and it must be
started up by an Official Technical Assistance Service authorized by DOMUSA TEKNIK..
Themodulemustbeinstalledconsideringtherequirementsdemandedateachinstallationsite:
TheTechnicalBuildingCode.
TheRegulationforHeatingInstallationsinBuildings.
TheLowVoltageRegulation.
The Codes of good practice andregulations refertothelatestversions of the same.

5
2LIST OF COMPONENTS
1.Burner.
2.Boilerbody.
3.Supportpumpshim.
4.3-waydivertervalve(G1).
5.Thermomanometer.
6.Bulb-holdersheath.
7.Fillingdisconnector.
8.Heatingsafetyvalve.
9.Automatic air bleedvalve.
10.Electricalconnectionstrips.
11.Controlpanel.
12.DHWexpansion vessel.
13.DHWsafetyvalve.
14.DHWtankbulbholder.
15.Heatingexpansionvessel.
16. Waterpressure switch.
17.Tankdeposit.
18.3-waydiverter valve (E1).
19.Circulationpump.
20.3-waydiverter valve (G1).
21. Primary drain valve.

FusionHybridOil
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3CONTROLCOMPONENTS
20. Heating control thermostatinboiler
mode( )
With it, it is possible the heating working
temperature the in boiler by stopping the
burner when the boiler temperature is equal
to that selected or keeping it on while it is
lower.
21. Burner and pumpswitch ( )
It allows the burner and the recirculation
pump of the module to be switched on and
off to maintain these two components. For
any other operation in the rest of the
components, it is essential to disconnect
both the module and the heat pump from
thepowersupply.
22. DHWoperatingmodeselector( )
With it, it is possible to select the Domestic
HotWateroperatingmode.
23. Heatingoperationmodeselector( )
With it, it is possible to select the heating
operation mode.
24. Safety thermostat ( )
It ensures that the boiler temperature does
notexceed110ºC,stoppingitsoperation.

7
4INSTALLATIONINSTRUCTIONS
The Fusion Hybrid Oil module can only be installed in combination with a heat pump from the DUAL
CLIMA line, supplied by DOMUSA TEKNIK. Therefore, for its operation, these devices should be
connected to each other, both hydraulically and electrically. In this section, the necessary operations
forsaidconnectionaredescribedindetail.
The module must be installed by personnel authorised by the Ministry of Industry, in compliance with
the applicable laws and regulations. In general, these laws and regulations a are the "Basic Gas
Installation Standards", the "Heating, Air Conditioning and Domestic Water Installation Regulation"
andallotherlocalregulations.
This support module is suitable for heating water to a temperature below boiling pointat atmospheric
pressure. It must be connected to a heating installation and/or a domestic hot water distribution
network, which must always becompatible with its performance and power.
This appliance should only be used for the purpose for which it has been expressly designed. Any
other use is considered unsuitable and therefore hazardous. The manufacturer shall not be considered
liable under any circumstances for damage caused byunsuitable,erroneousorunreasonableuse.
Remove all the packaging and check that the contents are complete. In case of doubt, do not use the
module and refer to the supplier. Keep thepackagingelementsoutofreachof children, as they canbe
dangerous.
When it is decided not to use the module anymore, the parts likely to constitute potential sources of
dangershouldbeproperlydecommissioned.
4.1 Location
The module should be located at a sufficiently ventilated site. The module must be located so that
the air grilles on the premises are not obstructed and that normal maintenance is possible even if it
isplacedbetweenitems of furniture.
4.2 Combustionproductremoval
It is essential that this type of boiler be connected to a flue, it being understood as a smoke duct
that that is capable of creating a depression (in this case, 1.5 mmH2O): For the flue to create a
pressuredrop,thefollowingrecommendationsshouldbetakenintoaccount:
-Itshouldbesuitablyinsulated.
- It should be independentlylocated, with a separate flue for each boiler.
-Itshouldbevertical,avoidinganyanglesgreaterthan45º.
- It should protrude onemeter from the roof ridge or an adjacent building.
- It should always have the same diameter. It is recommended that it be circular, and never
narrowerthan theboileroutlet.
Nevertheless,itshouldalwaysbebuilt in accordance with current installation regulations.
4.3 Hydraulic installation of theheatingandDHWcircuit.
The hydraulic installation should be carried out by qualified personnel, in compliance with the
currentinstallationregulation(RITE)andconsideringthefollowingrecommendations:
- It is recommended to use a correctly sized piping based on the installation in order to reach the
minimum water flow rate of the hydraulic circuit. The inside of the installation piping should be
thoroughlycleanedbeforeswitchingonthemodule.
- We recommend inserting cut-off valves between the installation piping and the apparatus to
simplifymaintenancetasks.
- If the module is installed at a lower height than the heating installation, it is advisable to create
a siphon at the boiler outlet, to prevent the installation from heating up due to natural
convectionwhenheatingisnotrequired.

FusionHybridOil
8
-WhentheDHWsupplypressureisover0.7MPa (7bar),apressurereducermustbefitted.
- It is advisable to install a thermostatic mixing valve at the DHW outlet to protect against burns
andtoguaranteeaconstant,stable supplyofhotwater.
- All water circuit piping MUST be insulated to prevent condensation during operation in
cooling mode and reduction of cooling and heating capacity, as well as to prevent freezing of
outside pipes during winter. The minimum insulation thickness of the pipes should be 19 mm
(0.039 W/mK), preferably comprising a closed cell insulation or a vapor barrier. In outdoor areas
exposed to the sun, the insulation must be protected from the effects of degradation.
- Drain valves and suitable devices should be fitted for the correct removal of air from the circuit
duringthefillingstage.
- A water filter must be installed in the water circuit of the heat pump, in order to avoid
obstructions or narrowing caused by dirt in the installation. The filter MUST be installed before
filling the installation with water and in the return branch of the machine, in order to avoid the
entry of dirty water into the heat exchanger (condenser). It is advisable to insert this filter
between two cutting keys, in order to avoid emptying the installation during cleaning. The
type of filter installed must be adapted to the particular characteristics of each installation
(type and material of the water pipes, type of water used, water volume of the installation, etc.).
The water filter should be checked and cleaned, if necessary, at least once a year. In new
installations, however, it is advisable to check it within the first few months of its
commissioning.
- The Fusion Hybrid Oil hydraulic module is an accessory that should be installed in
combination with a DUAL CLIMA heat pump for its correct operation. Therefore, in addition to
the recommendations described above, it must comply with those indicated in the heat pump
installation manual.
4.4 Hydraulic installation of a support pump (C4)
The Fusion Hybrid Oil hydraulic module allows the installation of a circulation pump to increase
the water flow rate of the machine where necessary, in addition to that obtained by its internal
pump. This circulation pump will operate in parallel with the internal pump of the C4 machine. To
installthissupportpump,pleasecarefullyfollowtheinstructionsbelows:
-First, remove the support pump shim(3)anditsinsulator.
Theinsulatorshouldbekeptforlateruse.

9
- In the place of the support pump shim (3), the support pump
must be installed in the direction indicated in the figure. Also, the
previously retired insulator piece should be used to obtain a new
pieceof120mm.
-Thesupportpumpshouldbeinstalledasshown in the image.
If the Fusion Hybrid Oil module is used in the cooling mode in addition to heating,
it is essential to insulate the pump correctly, in order to avoid condensation during cooling
modeoperation.
4.5 Electricalconnections
The module is equipped for connection at 230 V, 50 Hz, to terminals 1 and 2 of terminal stripJ1 (see
"ElectricalConnection Diagram" ). Makesurethattheapplianceisgrounded.
In addition, for the correct operation of the Fusion Hybrid Oil module, it is also necessary to
connect the heat pump to the power supply as indicated in the section “
Connection to the general
powersupply ”oftheDUAL CLIMA heat pumpmanual.
DANGER:When handling the electrical installation, make sure that both the module and
theDualClimaheatpumparedisconnectedfromthemains.
The Fusion Hybrid Oilmodule features a series of motorised diverting valves and DHW and
Heating support activation signals that are sensed by the DUAL CLIMA heat pump. To do this,
electrical cables with a minimum section of 0.5 mm2must be passed from the terminal strip of
theDUAL CLIMA heat pump to the inside of the FusionHybridOilmodule.Themodulehasaseries
of cable glandsat the rear, through which itis possible to insert these cables into the equipment.
The electrical connection of these signals will be carried out between the general terminal strip of
the heat pump and the terminal strip of the module, by opening the door and removing the front
cover of the internal control panel (11) to access it. The following figure describes how to connect
allthesignalsnecessaryforcorrectoperation.
First, it is necessary to remove the jumpers in the room thermostat connection of the DUAL
CLIMATE heat pump.

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E1 L E2 L E2 N C4 L NC6L LG1S
G3S HCO M
NC
E1 N
Once the jumpers have been removed, all the connections specified in the following diagram must
be made.
DANGER: When handling the electrical installation, make sure that both the module and
theDualClimaheatpumparedisconnectedfromthemains.
For the electrical connection of the support circulation pump C4 (optional), first two wires must be
connected in parallel with the heat pump circulation pump between terminals C4L and Nof the
DUAL CLIMA heat pump. These cables will be connected to the same terminals (see figure). Then,
these cables must be connected from the terminal strip of the DUAL CLIMA heat pump to the
inside of the Fusion Hybrid Oil module on terminals 27 and 28. Finally, the support circulation
pump C4 will be connected to terminals 29 and 30 of the module terminal block (see "Electrical
diagram")

11
4.6 AssemblyoftheDHWprobe
For the correct operation of the Fusion Hybrid Oil hydraulic module, the DHW probe, supplied in
the DUAL CLIMA heat pump, must be inserted in the bulb sheath provided in the module tank. This
probe is located inside the machine and is identified as “DHW TANK SENSOR”. This probe is
connected by default in the heat pump entries strip (terminal IN1). The probe provided with the
heat pump is 5 meters long. If necessary, could be extended to a maximum length of 50 meters
(section between 0,5 ÷ 1,25 mm2). For correct assembly, the probe must be inserted into the bulb
sheathprovided,followingthestepsindicatedbelow:
1.- With the module door open, remove the top cover
by pressing its central part upwards.
2.- Insert the sensor into the bulb sheath (14) provided
in the tank. Be sure to insert the sensor bulb until it
stopsagainst thebottomofthebulbsheath.
3.- Reassemble the top cover, placing it in position and
pressingthefourclampingpins.
4.- Connect the probe to the electrical connection strip (10) on terminals 22 and 23. (see
“ElectricalDiagram” ”).
DANGER: When handling the electrical installation, make sure that both the module and
theDualClimaheatpumparedisconnectedfromthemains.

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12
4.7 Assemblyandconnectionof the control panel
The control panel is supplied inside the heat pump and must be mounted on the front of the
Fusion Hybrid Oil hydraulic module. To do this, open the module door and access the control
panel holder located in the rear part. For its correct assembly, please carefully follow the following
steps:
1.- Open the door of the Fusion Hybrid Oil module and loosen
the butterfly nuts located on the back of the door as
indicatedinthefigure.
2.- Remove the support cap from the control panel, moving it
upwards.
3.- Removetheprotectivefoaminsert.
4.- Place the control panel removed from the DUAL CLIMA heat
pumpinitsplace.
5.- Reassemble the control panel cover, inserting it into the wing
nuts,moving it downwards.
6.- Tighten the wing nuts to attach the handle to the drawer
unit.

13
Before switching on the heat pump, the control panel must be connected to the external machine.
To do this, pass the cable that is supplied inside the heat pump (located alongside the probe
harness) to the interior of the Fusion Hybrid Oil module. The hydraulic module has a series of cable
glandsattherear,throughwhichitispossibletoinsertsuchcablesintothe module.
Finally, the connectors of the cable and the control panel should be connected at their ends. A
cable with sufficient length should be provided inside the module, in such a manner that it is
possible to open the front of the equipment without having to disconnect said cable and facilitate
anymaintenanceoperationinside.
The cable supplied with the heat pump is 5 metres long. Where necessary, it can be extended up to
amaximumdistanceof100metres(sectionbetween0.5÷1.25mm2).
DANGER:When handling the electrical installation, make sure that both the module and
theDualClimaheatpumparedisconnectedfromthemains.
Provide a sufficient length of cable inside the module in order to facilitate the
openingofthefront.
4.8 ConfiguringtheHeatPump
To properly configure and manage the operation of the DUAL CLIMA heat pump, please carefully read
the “Installation and OperatingInstructions Manual” supplied alongside the DUAL CLIMA heatpump.
Nevertheless, in order to obtain all the features for which the supporting module has been provided, it
should be ensured at least that the DHW service and the Heating and/or Cooling service are activated
byadjusting the DIP-Switch(SW1) of the controlpaneloftheheatpump.
In addition, for the correct management of the DUAL CLIMA heat pump with the support module, it
will be essential to set the value 3through parameter P27 of the Technical menu of theDUAL
CLIMA heat pump and value 0 through parameter P26 of the Technical menu ofthe DUAL CLIMA.

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14
5STARTING UP THEBOILER
5.1 Priorwarnings
Repair and maintenance of the module must be carried out by a qualified professional, authorised
by DOMUSA TEKNIK. For optimum functioning and conservation of the module, it should be
servicedannually.
Pleasecarefullyreadthisinstructionmanualandkeepitinasafe,easily-accessibleplace.
Before any intervention,disconnect the heat pump and the supporting modulefromthemains.
DOMUSATEKNIKwill not be liablefor any damages caused byfailuretofollowtheseinstructions.
5.2 Fillingthedomestichotwater tank
The hot water tank must be filled before filling the heating circuit. Open the flow of domestic hot
water to the hot water tank and turn on a hot water tap in the installation. When the tap begins to
run freely, turn it off, as this means the hot water tank is full.
5.3 Fillingtheheatingcircuit
The Fusion Hybrid Oil module is equipped with a filling disconnector (7) . The heat pump (external
unit) includes a manual drain valve on the upper part of the heat exchanger flow tube (condenser).
Open it during the filling process and wait for the water to start running (please refer to the
operations manual of the DUAL CLIMA heat pump). The air should also be bled from the rest of the
installation using the air bleed valves provided. The filling must be carried out slowly, thereby
facilitating air evacuation from the water circuit. Once the installation is full, close the disconnector
valves.
The module Fusion Hybrid Oil is equipped with a security water pressure switch set at a
pressure of 0,5 bar, which does not allow the module to start until that pressure is reached in the
installation. Turning on the module or the heat pump without water may cause serious damage
totheequipment.
5.4 Electricalconnection
The electrical connections of the module must be made by sufficiently qualified staff in strict
compliance with the sections below and with any electrical safety regulations applicable at the
timeofinstallation.
DANGER
Any intervention inside the module or the heat pump, and in particular on the electrical
connection strips, must be carried out by making sure that the power supply is disconnected from
boththemoduleandtheDualClimaheatpump.
If the electrical supply is connected, electrical contact could occur, causing serious damage
and/ordeathduetoelectrocution.
The moduleis designed formainsconnection at 230V – 50 Hz using the standard cable supplied.
Make sure that the electrical installation corresponds to the maximum power to be supplied, as
indicated on the boiler's specifications label. To replace the main fuse on the electronic card, use 2A
fuses. Itisessentialtoconnectthe module to ground.
Make sure you have tightened the cables sufficiently. The electrical connections must
be made in compliance with the applicable standards and regulations in the place of
installation.

15
5.5 Connectingtheroomthermostat(“AUTO”mode)
The Fusion Hybrid Oil module is prepared for the connection of up to 2 room programmable
thermostats or room thermostats (see “Connection Diagram” ), which will activate or stop the heating
and/or cooling service of the heating/air-conditioning installation, turning off the heat pump and the
supporting module when the desired temperature is reached in the home and turning it on when it
comesdownagain.
Connecting terminals 33 and 35, will activate and deactivate the Cooling mode, and connecting
terminals33and34of the terminal strip (see “Electrical Diagram” ) will activate and deactivate the
Heating mode, so that the operating modes of the heating/air-conditioning system will be remotely
and automatically managed (“AUTO” mode), from the place where the installed room thermostats are
located.
Terminals33, 34 and 35 are supplied from the factory with a jumper wire connected to each of them,
so, irrespective of the configuration of thermostats to be installed, it will be necessary to remove both
jumperwiresbeforeconnectingtheroomthermostats.
Depending on the types of thermostats used or their combination, up to 3 types of room thermostat
configurations can be installed. The following sections describe in detail the operation and installation
ofeachoftheseconfigurations.
DANGER: When handling the electrical installation, make sure that both the module and
theDualClimaheatpumparedisconnectedfromthemains.
ConnectingaswitchedthermostatforHeating/Coolingwith3wires(“AUTO”mode)
In addition to selecting the desired temperature and periods of operation, this type of thermostat,
if it is of the programmable thermostat type, offers users the possibility of selecting the mode of
operation(Heating /Cooling )inthethermostatitself.
For its operation, this type of thermostat has 3 communication wires: one for the activation signal
of the Heating mode, one for the activation signal of the Cooling mode, and one for the common
signal. Depending on the status of each of the signals, the Dual Clima heat pump will manage the
Heating/Coolingoperatingmodesasfollows:
Heatingmode Coolingmode OFF (Stand-By)
(temp.reached)
35
34
33
T
A
35
34
33
T
A
T
A
35
34
33

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16
Terminals 33, 34 and 35 are supplied from the factory with a jumper wire connected to each of
them, so in order to install this type of thermostat, it will be necessary to remove both jumper wires
and connect the thermostat as described inthefollowingfigure:
33 34 35 33 34 35
C
TA
DANGER: When handling the electrical installation, make sure that both the module and
theDualClimaheatpumparedisconnectedfromthemains.
Connectingthetworoomthermostats
In this type of configuration, two single room thermostats will be connected, one in terminals 33
and 35 (TAF Cooling thermostat) and one in terminals 33 and 34 (TAC Heating thermostat). Each of
them manages a different operating mode, so each thermostat must be of a type compatible with
the operation for which it has been installed. The thermostat connected to the cooling input (TAF)
should demand (closed circuit signal) when the room temperature is higher than the desired
temperature (setpoint temperature), and in turn, the thermostat connected to the heating input
(TAC) should demand (closed circuit signal) when the room temperature is lower than the desired
temperature(setpointtemperature).
The Dual Clima heat pump activates the Heating/Cooling operating modes according to the status
of the signal received from eachthermostat,asfollows:
Heatingmode Coolingmode
Cooling OFF (Stand-By) (temp.reached) Manualmode
TAC TAF
35
34
33
TAC TAF
35
34
33
TAC TAF
35
34
33
TAC TAF
35
34
33
As indicated in the figure, if the setpoint temperatures of the room thermostats are selected in such
a way that both require simultaneous operation, the electronic control of the heat pump will start
to operate in “Manual” mode, that is, the Heating/ Cooling Operating modes must be selected
manually from the control panel. To avoid this situation, it is essential to make sure to correctly

17
select the temperatures of each of them, in such a way that they do not cross and to avoid that
both thermostats are activated at the same time.
Terminals 33, 34 and 35 are supplied from the factory with a jumper wire connected to each of
them, so in order to install the thermostats, it will be necessary to remove both jumper wires and
connectthethermostatsasdescribed inthefollowingfigure:
33 34 35 33 34 35
C
C
C
TAC TAF
C
DANGER: When handling the electrical installation, make sure that both the module and
theDualClimaheatpumparedisconnectedfromthemains.
Connectingtheroomthermostat
In this type of configuration, a single room thermostat will be connected in inputs 33 and 35 (TAF
Cooling thermostat) or in inputs 34 and 35 (TAC Heating thermostat). For this room thermostat
management configuration to work correctly, the heat pump should be configured for a single
operating mode, that is, Heating or Cooling (see
“Heat pump configuration” ) in the manual of
theDual Climaheat pump. Depending on the input to which the thermostat is connected, it will
manage the corresponding mode of operation, and the type of room thermostat must be prepared
for this purpose. The thermostat connected to the cooling input (TAF) should demand (closed
circuit signal) when the room temperature is higher than the desired temperature (setpoint
temperature), and in turn, the thermostat connected to the heating input (TAC) should demand
(closed circuit signal) when the room temperature is lower than the desired temperature (setpoint
temperature).
Terminals 33, 34 and 35 are supplied from the factory with a jumper wire connected to each of
them, so in order to install this type of thermostat, it will be necessary to remove both jumper wires
and connect the thermostat as described in the following figure, depending on the mode to be
managed:
DANGER: When handling the electrical installation, make sure that both the module and
theDualClimaheatpumparedisconnectedfromthemains.

FusionHybridOil
18
Heatingthermostat(HeatingMode)
33 34 35 33 34 35
C
TAC
Coolingthermostat(CoolingMode)
33 34 35
C
TAF
33 34 35
5.6 Start-up
In order for the warranty to be valid, the module must be started up by an official DOMUSA
TEKNIK Technical Assistance Service. Before beginning the start-up process, the following must be
compliedwith:
-ThemoduleandtheDUAL CLIMA heatpump should be electrically connected to the network.
- The installation should be filled with water (the pressure should be between 0.1 to 0.15 MPa
(1to1.5bar).
-Thefuelshouldreachtheburneratapressure of no more than 0,05MPa(0.5bar).
- Check that the flue is correctlyinstalled.
- If the installationhas flowandreturnvalves, check that they are open.
-Ifthereisaroomthermostat, adjust it to the desired temperature.
- It is essential to carry out a combustion analysis of the module, using a suitable analyser for
this purpose. If the combustion analysis is not correct, the burner must be adjusted until it is
corrected.
Tostartthemodule,followtheinstructionsinthe “Operation” section.