DOMUSA TEKNIK DUAL CLIMA R User manual

DUAL CLIMA R
Air to Water Heat Pump
EN | INSTALLATION AND OPERATION INSTRUCTIONS

Thank you for choosing a DOMUSA TEKNIK heat pump. From the range of
DOMUSA TEKNIK products you have chosen the DUAL CLIMA R 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
1 SAFETY WARNINGS .................................................................................................................... 5
1.1 USAGE AND INSTALLATION WARNINGS ............................................................................................................ 5
1.2 PERSONAL SAFETY WARNINGS ...................................................................................................................... 5
1.3 TRANSPORT, STORAGE AND HANDLING WARNINGS ............................................................................................. 6
1.4 FREEZE PROTECTION WARNINGS ................................................................................................................... 6
2 ELECTRONIC CONTROLLER ........................................................................................................ 7
2.1 CONTROL UNIT ........................................................................................................................................ 7
2.2 ICONS ON THE CONTROL UNIT ..................................................................................................................... 8
3 SWITCHING THE HEAT PUMP ON AND OFF ................................................................................. 9
4 OPERATION ............................................................................................................................. 10
4.1 OPERATING MODE MANUAL SELECTION ......................................................................................................... 10
4.2 COOLING MODE ................................................................................................................................. 10
4.3 HEATING MODE ................................................................................................................................. 10
4.4 DHW MODE ..................................................................................................................................... 11
4.5 COOLING AND DHW MODE + ........................................................................................................... 11
4.6 HEATING AND DHW MODE + ........................................................................................................... 11
4.7 OPERATION IN HEATING/COOLING "AUTO" MODE .......................................................................................... 11
4.8 OPERATION WITH ROOM THERMOSTATS ........................................................................................................ 12
4.9 OPERATION ACCORDING TO OUTDOOR WEATHER CONDITIONS (AU) ..................................................................... 13
4.10 NIGHT MODE ...................................................................................................................................... 14
4.11 ANTI-LEGIONELLA FUNCTION ............................................................................................................. 14
5 TEMPERATURE SELECTION ...................................................................................................... 16
5.1 ADJUSTING THE COOLING MODE SETPOINT TEMPERATURE .................................................................................. 16
5.2 ADJUSTING THE HEATING MODE SETPOINT TEMPERATURE .................................................................................. 17
5.3 ADJUSTING THE DHW MODE SETPOINT TEMPERATURE ..................................................................................... 17
5.4 ADJUSTING THE ANTI-LEGIONELLA FUNCTION PARAMETERS ................................................................................ 17
6 INSTALLATION INSTRUCTIONS ................................................................................................ 19
6.1 LOCATION ............................................................................................................................................ 19
6.2 ACCESSORIES SUPPLIED ........................................................................................................................... 20
6.3 HEAT PUMP FASTENING ........................................................................................................................... 21
6.4 CONDENSATES DRAINAGE ........................................................................................................................ 21
6.5 HYDRAULIC INSTALLATION ........................................................................................................................ 22
6.5.1 Installing a DHW tank ...................................................................................................................... 23
6.5.2 Filling the installation ....................................................................................................................... 24
6.5.3 Draining the heat pump ................................................................................................................... 24
6.6 ELECTRICAL CONNECTIONS ....................................................................................................................... 25
6.6.1 Connection to the main power supply ............................................................................................... 25
6.6.2 Main board connection ..................................................................................................................... 27
6.6.3 Connecting the DHW tank sensor ..................................................................................................... 27
6.6.4 Connecting a backup source of energy for DHW (E1) ......................................................................... 28
6.6.5 Connecting the DHW diverter valve (G2) ........................................................................................... 29
6.6.6 Connecting a backup source of energy for Heating installation (E2) ..................................................... 3 0
6.6.7 Connecting the Heat/Cold diverter valve (G3) .................................................................................... 31
6.6.8 Connecting a Heat Pump auxiliary pump (C6) .................................................................................... 32
6.6.9 Room thermostat installation ............................................................................................................ 32
6.7 FREEZE PROTECTION .............................................................................................................................. 37
6.7.1 Antifreeze in DHW mode .................................................................................................................. 38
6.7.2 Antifreeze in Heating mode .............................................................................................................. 38
7 CONFIGURING THE HEAT PUMP ............................................................................................... 39
8 SETTINGS MENU ...................................................................................................................... 40
8.1 SETTINGS ............................................................................................................................................ 40
8.2 TIME SCHEDULING .................................................................................................................................. 41
8.3 SERVICE MENU ..................................................................................................................................... 42

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9 STATUS MENU ......................................................................................................................... 44
10 CONFIGURATION OF AUXILIARY OR SUPPORT SOURCES (E1, E2) ............................................ 47
10.1 BACKUP SOURCE MODE (P27 = 0) ............................................................................................................ 48
10.2 AUXILIARY SOURCE MODE (P27 = 1) ........................................................................................................ 48
10.3 PASSIVE COMBINED MODE (P27 = 2) ........................................................................................................ 49
10.4 ACTIVE COMBINED MODE (P27 = 3) ......................................................................................................... 49
11 COMMISSIONING ................................................................................................................... 50
11.1 PRIOR WARNINGS ................................................................................................................................. 50
11.2 START-UP .......................................................................................................................................... 50
11.3 EQUIPMENT DELIVERY ........................................................................................................................... 50
12 MAINTENANCE ....................................................................................................................... 51
13 DISPOSAL AND RECYCLING .................................................................................................... 5 2
14 ELECTRICAL DIAGRAMS ......................................................................................................... 53
14.1 NOMENCLATURE .................................................................................................................................. 53
14.2 DUAL CLIMA 6R .................................................................................................................................. 54
14.3 DUAL CLIMA 9R .................................................................................................................................. 55
14.4 DUAL CLIMA 12R ................................................................................................................................. 56
14.5 DUAL CLIMA 16R ................................................................................................................................. 57
14.6 DUAL CLIMA 19R ................................................................................................................................. 58
14.7 DUAL CLIMA 16RT ............................................................................................................................... 59
14.8 DUAL CLIMA 19RT ............................................................................................................................... 60
15 TECHNICAL CHARACTERISTICS .............................................................................................. 61
16 CHARACTERISTICS OF THE CIRCULATION PUMP ..................................................................... 62
16.1 CHARACTERISTICS OF THE SC PUMP .......................................................................................................... 62
16.2 SYMBOLOGY ....................................................................................................................................... 62
16.2.1 Control modes ............................................................................................................................... 63
16.2.2 Functions ...................................................................................................................................... 64
16.3 CIRCULATING PUMP FLOW CURVES ............................................................................................................ 65
16.4 DUAL CLIMA 12R, 16R AND 16RT CIRCULATION PUMP WORKING CURVES ........................................................... 65
16.5 DUAL CLIMA 19R AND 19RT CIRCULATION PUMP WORKING CURVES ................................................................... 66
16.6 DUAL CLIMA 6R AND 9RT CIRCULATION PUMP WORKING CURVES ...................................................................... 67
17 PERFORMANCE AND EFFICIENCY DIAGRAMS ........................................................................... 68
18 DIAGRAMS AND MEASUREMENTS ........................................................................................... 75
19 ALARM CODES ....................................................................................................................... 76
20 WARRANTY CONDITIONS ....................................................................................................... 8 0

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DUAL CLIMA R
1 SAFETY WARNINGS
1.1 Usage and installation warnings
DUAL CLIMA R 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.
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.

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DUAL CLIMA R
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 R 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.
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.

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DUAL CLIMA R
2 ELECTRONIC CONTROLLER
2.1 Control unit
The electronic control unit of the DUAL CLIMA R heat pump features a touchscreen, through which
all the features and adjustable configuration parameters can be managed.
1. STATUS touch button:
Press this button to access and browse
through the C parameters of the heat pump
service menu. See
"Status menu" .
2. SETTINGS touch button:
Press this button to access and browse the
heat pump settings menu. See “
Settings
Menu
”.
3. MODE touch button:
Press this button to access the different
operating modes. See
"Selecting the operating
modes"
.
4. ERROR touch button:
Press this button to access the last alarm
codes detected in the heat pump. See
"Alarm
codes"
.
5. Off button:
Press this button to turn off the heat pump.
6. Cooling temperature setpoint:
It selects and displays the cooling temperature
setpoint. See
"Temperature selection" .
7. Heating temperature setpoint:
It selects and displays the heating
temperature setpoint. See
"Temperature
selection"
.
8. DHW temperature setpoint:
It selects and displays the DHW temperature
setpoint. See
"Temperature selection" .
9. Current operating flow:
It displays the current heat pump operating
flow.
1
2
3
4
567 8
11
121314
15
16
10
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DUAL CLIMA R
10. Message display:
It displays the heat pump alarm codes and
messages.
11. Alarm indicator LED:
Failure or alarm indicator in the heat pump
operation.
12. Current DHW temperature:
It displays current DHW temperature.
13. Current flow temperature:
It displays the current temperature of the heat
pump flow temperature probe.
14. Current return Temperature:
It displays the current temperature of the heat
pump return temperature probe.
15. Power button:
Press this button to turn on the heat pump.
16. Power LED:
Heat pump on or off status indicator.
2.2 Icons on the control unit
The display has different display areas and sets of icons and numbers that indicate the different statuses
of the heat pump.
Operating modes:
AU mode enabled.
Cooling Mode enabled.
Heating Mode enabled.
DHW Mode enabled.
Indication of active components:
Water circulator pump activated.
Compressor activated.
Fan activated.
E1 Resistor or auxiliary energy E1 activated.
E2 Resistor or auxiliary energy E2 activated.
Additional functions:
Anti-legionella Function enabled.
Antifreeze Function enabled.
Defrost Function activated.
Time schedule activated.
Room Thermostat function
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3 SWITCHING THE HEAT PUMP ON AND OFF
To turn on the heat pump, press the power button (15) and accept the selection. The heat pump will turn
on in the last previously selected operating mode, and a green light will turn on in the power LED (16) of
the digital display.
Depending on the selected operating mode, the operating mode icons ( ) will be shown on the
digital display.
To turn off the heat pump, press the off button (5) and accept the selection. The heat pump will proceed
to execute the shutdown sequence and the green light will disappear on the power LED (16) of the digital
display.

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4 OPERATION
4.1 Operating mode manual selection
Depending on the set-up of your installation, the DUAL CLIMA R heat pump will be able to manage
up to 5 different operating modes manually. To select these operating modes, press MODE (3) from
the home screen and the following modes will be displayed:
+ Heating and DHW mode
Heating Mode.
Domestic Hot Water (DHW) Mode.
+ Cooling and DHW mode
Cooling Mode.
When the heat pump is set and installed for its functioning in "AUTO" mode, the Heating and Cooling
modes are not available to be selected manually. The heat pump enables and disables automatically
these modes by means of the signal received from a remote room thermostat connected (see
"Heating/Cooling "AUTO" mode functioning" ).
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 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 R 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 in Heating/Cooling "AUTO" mode" ).
This mode will operate only on the heating/cooling installation, disabling the DHW production service,
if any.
4.3 Heating mode
In this operating mode, the DUAL CLIMA R 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 in Heating/Cooling "AUTO" mode" ).
This mode will operate only on the heating/cooling installation, disabling the DHW production service,
if any.