DOMUSA DUAL CLIMA 8 User manual

INSTALLATION AND OPERATING INSTRUCTIONS
DUAL CLIMA

Thank you for choosing a DOMUSA TEKNIK heat pump. From the range of
DOMUSA TEKNIK products you have chosen the DUAL CLIMA model. This is a
heat pump capable of providing the ideal level of comfort for your home,
always with a suitable hydraulic installation.
This manual forms an essential part of the product and it must be given to the
user. Read the warnings and recommendations in the manual carefully, as they
contain important information on the safety, use and maintenance of the
installation.
This water pump must be installed by qualified personnel only, in accordance
with the legislation in force and following the manufacturer’s instructions.
The start-up of this heat pump and any maintenance operations must be
carried out only by Official Technical Assistance Services of DOMUSA TEKNIK.
Incorrect installation of this heat pump could result in damage to people,
animals or property, and the manufacturer will not be held liable in such cases.

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CONTENTS Page
1SAFETY WARNINGS................................................................................................................................................................... 2
1.1 USAGE AND INSTALLATION WARNINGS .........................................................................................................................................................2
1.2 PERSONAL SAFETY WARNINGS .......................................................................................................................................................................2
1.3 TRANSPORT,STORAGE AND HANDLING WARNINGS ......................................................................................................................................3
1.4 FREEZE PROTECTION WARNINGS ....................................................................................................................................................................3
2ELECTRONIC CONTROLLER .................................................................................................................................................... 4
2.1 CONTROL BUTTONS........................................................................................................................................................................................4
2.2 DIGITAL DISPLAY............................................................................................................................................................................................5
3SWITCHING THE HEAT PUMP ON AND OFF ..................................................................................................................... 6
4OPERATION.................................................................................................................................................................................. 6
4.1 OPERATING MODE SELECTION........................................................................................................................................................................6
4.2 AUTO MODE ...........................................................................................................................................................................................6
4.3 COOLING MODE .......................................................................................................................................................................................7
4.4 HEATING MODE ........................................................................................................................................................................................7
4.5 DHW MODE .............................................................................................................................................................................................7
4.6 AUTO AND DHW MODE +..............................................................................................................................................................7
4.7 COOLING AND DHW MODE +..........................................................................................................................................................8
4.8 HEATING AND DHW MODE +...........................................................................................................................................................8
4.9 ANTI-LEGIONELLA FUNCTION ........................................................................................................................................................................8
5TEMPERATURE SELECTION..................................................................................................................................................... 9
5.1 ADJUSTING THE COOLING MODE SETPOINT TEMPERATURE...........................................................................................................................9
5.2 ADJUSTING THE HEATING MODE SETPOINT TEMPERATURE ...........................................................................................................................9
5.3 ADJUSTING THE DHW MODE SETPOINT TEMPERATURE............................................................................................................................. 10
5.4 ADJUSTING THE ANTI-LEGIONELLA FUNCTION PARAMETERS ....................................................................................................................10
6ADDITIONAL FUNCTIONS.....................................................................................................................................................11
6.1 NIGHT MODE...............................................................................................................................................................................................11
6.2 OPERATION WITH ROOM THERMOSTAT ...................................................................................................................................................... 12
6.3 OPERATION WITH A ROOM SENSOR ............................................................................................................................................................ 12
7CLOCK AND TIMER SETTINGS..............................................................................................................................................13
7.1 TIME AND DAY SETTINGS............................................................................................................................................................................. 13
7.2 TIMER SETTINGS ..........................................................................................................................................................................................13
8OPERATION ACCORDING TO OUTDOOR WEATHER CONDITIONS (AU)...............................................................16
9INSTALLATION INSTRUCTIONS...........................................................................................................................................17
9.1 LOCATION.................................................................................................................................................................................................... 17
9.2 ACCESSORIES SUPPLIED ..............................................................................................................................................................................18
9.3 HEAT PUMP FASTENING .............................................................................................................................................................................. 19
9.4 CONDENSATES DRAINAGE ..........................................................................................................................................................................19
9.5 HYDRAULIC INSTALLATION .........................................................................................................................................................................20
9.6 ELECTRICAL CONNECTIONS ......................................................................................................................................................................... 22
9.7 FREEZE PROTECTION ...................................................................................................................................................................................30
10 CONFIGURING THE HEAT PUMP.........................................................................................................................................32
11 TECHNICAL MENU...................................................................................................................................................................32
12 COMMISSIONING.....................................................................................................................................................................33
12.1 PRIOR WARNINGS ........................................................................................................................................................................................ 33
12.2 START-UP.....................................................................................................................................................................................................33
12.3 EQUIPMENT DELIVERY ................................................................................................................................................................................. 34
13 MAINTENANCE.........................................................................................................................................................................34
14 TECHNICAL CHARACTERISTICS...........................................................................................................................................35
15 ELECTRICAL DIAGRAMS ........................................................................................................................................................36
15.1 NOMENCLATURE .........................................................................................................................................................................................36
15.2 DUAL CLIMA 8 ............................................................................................................................................................................................37
15.3 DUAL CLIMA 11.......................................................................................................................................................................................... 38
15.4 DUAL CLIMA 16.......................................................................................................................................................................................... 39
16 DIAGRAMS AND MEASUREMENTS....................................................................................................................................40
17 ALARM CODES..........................................................................................................................................................................41

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1SAFETY WARNINGS
1.1 Usage and installation warnings
DUAL CLIMA heat pump must be installed by personnel authorised by the Ministry of Industry, in
compliance with the applicable laws and regulations. The precautions detailed here cover very
important issues. Please be sure to follow them carefully.
Read carefully this instruction manual and keep it in a safe, easily-accessible place. DOMUSA
TEKNIK will not be liable for any damages caused by failure to follow these instructions.
This heat pump is suitable for use in both heating and cooling installations and can be combined
with fan coils, underfloor heating/cooling, low-temperature radiators, and domestic hot water
tanks (optional). It must be connected to a heating/cooling installation and/or a domestic hot water
distribution network and compatible with its performance and power.
This appliance must 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
irrational use.
Remove all the packaging and check the contents are complete. In case of doubt, do not use the
heat pump. Contact your supplier. Keep the packaging elements out of reach of children, as they
can be dangerous.
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 designed specifically 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 Service of
DOMUSA TEKNIK.
When it is decided not to use any more the heat pump, disable the parts that could represent a
potential hazard.
1.2 Personal safety warnings
Always wear appropriate personal protective equipment (gloves, safety goggles, etc.) when
performing installation and/or maintenance on the unit.
Do not touch any switch with wet fingers. Touching a switch with wet fingers may cause electric
shock. Before accessing the electrical components of the heat pump, disconnect the main power
supply completely.
Disconnect all electricity sources before dismantling the cover panel from the electric panel or
before making any connections or accessing electrical parts.
To avoid electrocutions, be sure to turn off the power for 1 minute (or more) before servicing the
electrical parts. Even after 1 minute, always measure the voltage at the terminals of the main circuit
capacitors and other electrical parts before touching them and make sure that the voltage is equal
to or less than 50 Vdc.

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When the cover panels are disassembled, the energised parts can be easily accessed. Never leave
the unit unattended during installation or during maintenance work when the cover panel is
removed.
Do not touch the coolant pipes, water piping, or internal parts during and immediately after
operation. Pipes and internal parts may be excessively hot or cold, depending on the use of the
unit.
The hands may be burned by cold or heat in case of improperly touching pipes or internal parts. To
avoid injury, wait until the pipes and internal parts return to their normal temperature.
Alternatively, if access is required, be sure to wear appropriate safety gloves.
1.3 Transport, storage and handling warnings
DUAL CLIMA heat pump must be transported, handled and stored vertically. Tipping the machine
may cause the oil to be emptied inside the compressor, causing premature rupture of the machine
when the machine is started.
OK NO OK
The heat pump packaging has a "tilt indicator" label to ensure that the machine has not been
overturned during transport and storage. Before receiving the machine from your supplier
(distributor), check the status of this indicator and refuse the device without unpacking it if
the warning switch of the label indicates that it has been overturned.
Do not twist, loosen or pull the external electric cables of the heat pump. Do not insert any sharp
objects through the fan grille or into the fan itself.
Do not wash the interior of the heat pump with water as this may result in electric shock or fire. For
any cleaning and/or maintenance operations, disconnect the main power supply.
1.4 Freeze protection warnings
DUAL CLIMA heat pump is a machine that is installed in the exterior of the house, so that it will be
exposed to the extreme climatic conditions of cold in the periods of frost. Due to this, it is of
paramount importance that this type of machine is protected against such frost. The freezing of the
water inside the heat pump causes the heat pump to breakdown, with the subsequent interruption
of its operation and major economic expenses involving its repair.
It is mandatory to use a safety system in the installation to prevent the freezing of water in the
machine. DOMUSA TEKNIK proposes the use of glycol in the water circuit of the pump, or some
antifreeze valve system to empty the installation in conditions of low temperatures. Carefully read
the "Freeze Protection" section in this manual for more detailed information on these systems.
DOMUSA TEKNIK will not cover damages caused by the lack of any of these antifreeze safety
systems.

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The electronic controller of the DUAL CLIMA heat pump has a function for protection against the
freezing of the water in its interior in periods of frost. For this function to remain active and on alert,
the heat pump must be connected to the mains and have a power supply, even if it is switched off
or not in use.
A water filter should be installed in the installation, in order to avoid obstructions in the water
circuit of the heat pump. It must be installed in the return circuit of the heat pump and MUST be
installed before filling and circulating the water through the installation. 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.
2ELECTRONIC CONTROLLER
2.1 Control buttons
The electronic controller of the DUAL CLIMA heat pump has 6 control buttons, through which all
the features and adjustable settings can be managed.
Power button: This button switches the heat pump on and off. It can also be used to exit
the different adjustment menus (Escape key).
Mode button: This button selects the operating mode.
Confirmation button: This button saves and confirms the selected adjustment value.
Adjustment buttons: Pressing these buttons increases and decreases the selected
adjustment value. It can also be used to navigate within the
different adjustment menus.
Clock button: This button accesses the adjustments related to the time and time
programming of the heat pump.

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2.2 Digital Display
The controller of the DUAL CLIMA heat pump incorporates a digital display for the viewing and
adjustment of the different parameters of the heat pump. The display has different display areas
and sets of icons and numbers that indicate the different statuses of the heat pump.
Operating modes: Additional functions:
AUTO mode enabled. Anti-legionella Function enabled.
Cooling Mode enabled. Antifreeze Function enabled.
Heating Mode enabled. Defrost Function activated.
DHW Mode enabled. Room Thermostat function.
Alarm display.
Temperature display: Clock Timer:
Numerical display. Time digits.
Temperature unit, Celsius degrees. Time programmer adjusted.
Temperature adjustment. On programming point (1, 3 or 5).
Heat pump water temperature. Off programming point (2, 4 or 6).
Temperature of the DHW tank. Time schedule activated.
Indication of active components:
Water circulator pump activated.
Compressor activated.
Resistor or auxiliary energy
activated.
Fan activated.

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3SWITCHING THE HEAT PUMP ON AND OFF
To turn on the heat pump press the button . The heat pump will turn on in the last operating mode
previously selected and at least one of the operating mode icons ( ) will appear on the
digital display.
To turn off the heat pump, press the button again. The heat pump will proceed to the shutdown
sequence and all operating mode icons on the digital display will disappear.
4OPERATION
4.1 Operating mode selection
Depending on the set-up of your installation, the DUAL CLIMA heat pump will be able to manage
up to 7 different operating modes. To select these operating modes, press the button
successively. The following modes will be displayed:
AUTO mode.
Cooling Mode.
Heating Mode.
Domestic Hot Water (DHW) Mode.
+ AUTO and DHW mode
+ Cooling and DHW mode
+ Heating and DHW mode
Depending on the configuration of your installation, some of the operating modes listed may not
be selectable. Please read carefully the following sections, which describe in detail the operation of
these modes.
4.2 AUTO mode
This mode is selectable only if the heating/cooling installation is ready for operation in Cooling
mode (cooling floor, fan coils, etc.) and the heat pump is configured for this purpose.
In this operating mode, the electronic controller of the heat pump, depending on the temperature
outside the home, will automatically decide when to activate the heating or cooling mode of the
heating/cooling installation. If the outside temperature is below 15°C, the heating mode will be
activated; if the outside temperature is above 25 ºC, the cooling mode will be activated. If the
outside temperature is between 15 ~ 25°C, the last operating mode will remain active. For more
information on each of these operating modes, read the following sections of the manual carefully.
This mode will operate only on the heating/cooling installation, disabling the DHW production
service, if any.

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4.3 Cooling mode
This mode is selectable only if the heating/cooling installation is ready for operation in Cooling
mode (cooling floor, fan coils, etc.) and the heat pump is configured for this purpose.
In this operating mode, the DUAL CLIMA heat pump will cool and keep the water in the
heating/cooling installation at the desired temperature. To do this, select the desired cooling
temperature setpoint (see "Temperature Selection") and the temperature of the room thermostat (if
any) (see "Operation with Room Thermostat").
This mode will operate only on the heating/cooling installation, disabling the DHW production
service, if any.
4.4 Heating mode
In this operating mode, the DUAL CLIMA heat pump will heat and maintain the water in the
heating/cooling installation at the desired temperature. To do this, select the desired heating
temperature setpoint (see "Temperature Selection") and the temperature of the room thermostat (if
any) (see "Operation with Room Thermostat").
This mode will operate only on the heating/cooling installation, disabling the DHW production
service, if any.
4.5 DHW mode
This mode will be selectable only if the installation has a Domestic Hot Water tank connected and
the heat pump is configured for it.
In this operating mode, the DUAL CLIMA heat pump will heat the domestic water of the DHW tank
up to the desired temperature, allowing Domestic Hot Water service to the home. To do this, select
the desired DHW setpoint temperature (see "Temperature Selection"). Once the desired temperature
has been reached, the heat pump will stop and wait to receive the DHW demand.
This mode will operate only on the installation of the DHW tank, disabling the heating and/or
cooling installation of the heating/cooling installation.
4.6 AUTO and DHW mode +
This mode will be selectable only if the heating/cooling installation is ready to operate in Cooling
mode (cooling floor, fan coils, etc.); the installation has a connected domestic hot water tank and
the heat pump is configured for it.
This operating mode is the combination of the AUTO and DHW modes simultaneously. When the
DHW demand is enabled, the heat pump will disable the heating or cooling service and enable the
Hot Domestic Water production mode, with the production of priority DHW relating to the heating
or cooling of the heating/cooling installation. Once the desired DHW temperature is reached, the
heat pump will re-enable automatic heating or cooling of the installation (see "AUTO Mode").

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4.7 Cooling and DHW mode +
This mode will be selectable only if the heating/cooling installation is ready to operate in Cooling
mode (cooling floor, fan coils, etc.); the installation has a connected domestic hot water tank and
the heat pump is configured for it.
This operating mode is the combination of the Cooling and DHW simultaneously. When the DHW
demand is enabled, the heat pump will disable the Cooling mode and will enable the Domestic Hot
Water production mode, with the production of priority DHW relating to the cooling of the
heating/cooling installation. Once the desired DHW temperature is reached, the heat pump will re-
enable the Cooling mode.
4.8 Heating and DHW mode +
This mode will be selectable only if the installation has a Domestic Hot Water tank connected and
the heat pump is configured for it.
This operating mode is the combination of the Heating and DHW modes simultaneously. When the
demand for DHW is activated, the heat pump will disable the Heating mode and will enable the Hot
Domestic Water production mode, with the production of priority DHW relating to the heating of
the heating/cooling installation. Once the desired DHW temperature is reached, the heat pump will
re-enable the Heating mode.
4.9 Anti-Legionella function
This function prevents the proliferation of Legionella bacteria in the domestic hot water stored in
the tank, so it will only be available if the installation has a connected Domestic Hot Water tank and
the heat pump is configured for it. In addition, in order to make the function effective, it will be
essential for the tank to have a heating component installed, in order to reach the temperatures
required to eradicate the bacteria.
The function will periodically raise the temperature of the Domestic Hot Water from the tank to a
temperature of 60~70 ºC. To do this, the desired temperature and periodicity can be selected (see
"Temperature Selection"). This function will be activated regardless of the operating modes that are
activated at the time of starting, even when the heat pump is in Standby mode.
In addition, it is possible to activate the function manually, keeping the button pressed during 5
seconds. Once the function is activated, it is not possible to stop it and it will have to wait until it
finished, in order that the machine returns to its normal operation.