DOMUSA TEKNIK FUSION COMBI W 50 User manual

FUSION COMBI W 50
FUSION COMBI F 80
HYBRID MODULE
EN | INSTALLATION AND OPERATING INSTRUCTIONS

Thank you for choosing a DOMUSA TEKNIK heat pump accessory. You
have chosen the FUSION model from the DOMUSA TEKNIK product line.
This is an all-in-one hydraulic accumulation module, which in combination
with a DUAL CLIMA R heat pump and provide the adequate level of comfort
for your home, provided that the hydraulic installation is correctly performed.
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.
The installation of this appliance should be carried out only by qualified
personnel, in accordance with the regulations in force and following the
manufacturer’s instructions.
Both the start-up and any maintenance operation of this appliance should be
carried out only by the Official Technical Assistance Services of DOMUSA
TEKNIK.
Incorrect installation of this product may cause damage to people, animals
and objects, for which the manufacturer shall not be held liable.
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 schemes available, contact either the
collection facilities of the local authority or the distributor where the purchase
was made.

3
FUSION COMBI W 50/FUSION COMBI F 80
INDEX
1 SAFETY WARNINGS ................................................................................................................. 4
1.1 SAFETY SYMBOLS ....................................................................................................................................... 4
1.2 OTHER SYMBOLS........................................................................................................................................ 4
1.3 USAGE AND INSTALLATION WARNINGS ............................................................................................................. 5
1.4 PERSONAL SAFETY WARNINGS........................................................................................................................ 5
2 LIST OF COMPONENTS............................................................................................................. 6
3 INSTALLATION INSTRUCTIONS ................................................................................................ 8
3.1 LOCATION AND WALL MOUNTING (ONLY FOR FUSION COMBI W50 MODEL) ........................................................... 9
3.2 HYDRAULIC INSTALLATION.......................................................................................................................... 10
3.3 DRAINAGE THE TANK................................................................................................................................. 12
3.4 ASSEMBLY AND CONNECTION OF THE CONTROL PANEL........................................................................................ 12
3.5 ELECTRICAL CONNECTION........................................................................................................................... 15
3.5.1 Connecting the circulation pumps of the installation (BC, BF) ............................................................... 15
3.5.2 Connecting the module with the DUAL CLIMA R heat pump and the boiler............................................ 15
3.5.3 INSTRUCCIÓN DE CONEXIÓN ELÉCTRICA CON UNA CALDERA CON MANTENIMIENTO DE TEMPERATURA MÍNIMA DE CALDERA . 17
3.6 CONNECTING ROOM THERMOSTATS ............................................................................................................... 18
3.6.1 Connecting a 3-wired switched room thermostat for Heating/Cooling ................................................... 18
3.6.2 Connecting two room thermostats (one for heating and the other for cooling) ...................................... 20
3.6.3 Connecting a 2-wired two room thermostats for two zones (manual mode) .......................................... 21
3.6.4 Connecting one room thermostat ....................................................................................................... 22
4 OPERATION .......................................................................................................................... 23
4.1 HEAT PUMP CONFIGURATION....................................................................................................................... 23
4.2 BOILER ONLY MODE SWITCH ....................................................................................................................... 23
5 ELECTRICALSCHEME.............................................................................................................. 24
6 DIAGRAMS AND MEASUREMENTS ........................................................................................... 25

EN
4
FUSION COMBI W 50/FUSION COMBI F 80
1SAFETY WARNINGS
1.1 Safety symbols
All safety messages indicate a potential risk of breakdown or damage. Follow the instructions carefully
to avoid accidents or damage.
DANGER
Warns of operations or situations of imminent danger, which, if not avoided, can cause
severe injury or even death
1.2 Other symbols
The following symbols are used in instructions to draw attention to important information.
NOTE: Indicates the risk of breakdown and damage to property or people.
ATTENTION: Indicates important additional information that may be related to the correct
operation of the module

5
FUSION COMBI W 50/FUSION COMBI F 80
1.3 Usage and installation warnings
The FUSION COMBI module should be installed by personnel authorised by the Ministry of Industry,
in compliance with the laws and regulations in force in the matter. The precautions detailed here cover
very important issues, so please be sure to follow them accordingly.
Please carefully read this instruction manual and keep it in a safe, easily accessible place.
shall not be held liable for any damage that may occur due to failure to follow these instructions.
The FUSION COMBI storage module can only be installed in combination with a heat pump from the
DUAL CLIMA R line from DOMUSA TEKNIK. The Fusion Combi module, in combination with a DUAL
CLIMA R 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 improper use.
Remove all the packaging and check that the contents are complete. In case of doubt, do not use the
appliance and refer to the 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 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 Service of DOMUSA TEKNIK.
When it is decided not to use the equipment anymore, the parts likely to constitute potential sources
of danger should be properly decommissioned.
1.4 Personal safety warnings
Always wear suitable personal protection equipment (protective gloves, safety glasses, etc.) when
carrying out installation and/or maintenance operations in 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, fully disconnect the power supply.
Do not touch water pipes 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.

EN
6
FUSION COMBI W 50/FUSION COMBI F 80
2LIST OF COMPONENTS
FUSION COMBI W 50
1. Steel storage tank, with thermal
insulation, 50L.
2. Heating/cooling pump circuit 1.
3. Heating/cooling flow circuit 1.
4. Heating/cooling Flow circuit 2.
5. Drain/drain socket.
6. Heating/cooling return circuit 1.
7. Heating/cooling return circuit 2.
8. Return to boiler.
9. Return to DUAL CLIMA R Heat Pump.
10. Inlet from boiler.
11. Entrance from DUAL CLIMA R Heat Pump.
12. DUAL CLIMA R Heat Pump control panel.
13. Boiler only operation switch.
14. Connection strip.

7
FUSION COMBI W 50/FUSION COMBI F 80
FUSION COMBI F 80
1. System drain valve.
2. Connection strip.
3. Steel storage tank, with thermal insulation, 80L.
4. Heating/cooling pump circuit 1.
5. DUAL CLIMA R Heat Pump control panel.
6. Boiler only operations switch.
7. Heating/cooling Flow circuit 1.
8. Inlet from boiler.
9. Entrance from DUAL CLIMA R Heat Pump.
10. Heating/cooling Flow circuit 2.
11. Return to boiler.
12. Heating/cooling return circuit 1.
13. Return to Heat Pump DUAL CLIMA R.
14. Heating/cooling return circuit 2.

EN
8
FUSION COMBI W 50/FUSION COMBI F 80
3INSTALLATION INSTRUCTIONS
The FUSION COMBI hydraulic module can only be installed in combination with a heat pump from the
DUAL CLIMA R line supplied by DOMUSA TEKNIK and an existing heating boiler. Therefore, for their
operation, these devices should be connected to each other, both hydraulically and electrically. In this
section, the necessary operations for said connection are described in detail.

9
FUSION COMBI W 50/FUSION COMBI F 80
3.1 Location and wall mounting (only for FUSION COMBI W 50 model)
It is recommended to install a drain in the outlet provided for this in the upper part of the module, to
prevent the appearance of siphons in the installation.
It will be essential to allow access from the front, so it should not be installed in front of any
obstacle that makes such access impossible.
Wall fixing system:
Although the FUSION COMBI W 50 module is supplied from the factory, foreseeing its installation
with the DUAL CLIMA R heat pump and boiler outlets from the top, the FUSION COMBI W 50
module can be mounted with said outlets on the bottom of the module. To do this, the module has
hangers at both ends. Once the module is hung on the wall, if necessary, turn the front cover and
position it in the new position.
NOTE: It is recommended to install a plunger in the upper outlet (5) and a drain cock in
the lower one.

EN
10
FUSION COMBI W 50/FUSION COMBI F 80
3.2 Hydraulic installation
The hydraulic installation should be carried out by qualified personnel, in compliance with the current
installation regulation and considering the following recommendations:
•For the hydraulic connection between the FUSION module and the DUAL CLIMA heat
pump, use two conveniently insulated tubes to connect the IBC and RBC sockets of the
module (see “Diagrams and Measurements” ) with the flow and return sockets of the heat
pump, respectively.
•All water circuit piping 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 during the filling stage.
•• A 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 prior
to filling the installation and on the return branch of the machine with water, to avoid the
entry of dirty water into the heat exchanger (condenser). It is recommended to insert
this filter between two cut-off valves, in order to be able to clean it without
emptying the installation. 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,
volume of water in the installation, etc.). The water filter should be checked and cleaned, if
necessary, at least once a year, although in new installations it is recommended to check it
in the first months after commissioning.
The FUSION COMBI hydraulic module is an accessory that should be installed in combination with a
DUAL CLIMA R and an existing boiler 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.
ATTENTION: The DUAL CLIMA R heat pump incorporates a 2-liter expansion tank as
standard. Due to the total amount of water in the heating / air conditioning
installation, if necessary, this capacity should be increased by installing
another supplementary expansion vessel.
ATTENTION: A pipe with a diameter suitable for the installation must be used so that the
minimum flow is reached in the hydraulic circuit.
ATTENTION: Before connecting the heat pump, a thorough internal cleaning of the pipes
of the hydraulic installation must be carried out.