Immergas MAGIS M4-30 Use And Installation page 73

9.4.3 Water circuit connection.
The water connections must be performed properly according to the labels applied on the heat pump, indicating water
inlet and outlet.
CAUTION
Be careful not to deform the unit's pipes by exerting excessive force when connecting the pipes. Pipe deformations can
cause the unit to malfunction.
Always keep the following in mind when connecting the water circuit:
• Use a proper thread sealant to seal the connections. The seal must be capable of withstanding the pressures and tempera-
tures of the system.
• When non-copper metal pipes are used, make sure the two materials are insulated from each other to avoid galvanic
corrosion.
NOTE
The unit must be used in a closed water system only. The application in an open water circuit could cause excessive
corrosion to the water pipes:
• Never use any galvanised parts in the water circuit. These parts can corrode excessively as the copper pipes are used
in the internal water circuit of the unit
• When a 3-way valve or 2-way valve is used in the water circuit. The maximum recommended switching time of the
valve should be less than 60 seconds.
9.4.4 Anti-freeze protection of water circuit.
All the internal hydronic parts are insulated to reduce thermal dispersion. Insulation must also be added to the pipes on
the field.
The software has special functions that use the heat pump to protect the entire system from freezing. When the water flow
temperature in the system drops below a certain value, the unit heats the water with the heat pump. The anti-freeze protec-
tion function only deactivates when the temperature rises to a certain value.
In case of a power failure, the above features would not protect the unit from freezing. It is therefore recommended to empty
the system (if the water is not mixed with glycol). If the system remains idle, empty it and disassemble and clean the flow
switch to prevent the water inside from freezing. The flow switch must be removed and dried, and then refitted in the unit.
"Anti-clockwise rotation,
remove the flow switch.
Dry the flow switch com-
pletely. "
Models 4-16kW.
Models 4-16kW.
Models 18-30kW.
Keep dry
Mantenere asciutto
73