Commissioning; Re-Filling The System; Venting The System; Venting Of Hot Water Tank - ComfortZone RX35 User And Installation Manual

ComfortZone RX35/RX50/RX65

9 Commissioning

9.1 Re-filling the system

Fill the system by opening the filling valves (2 and 3). The heat pump is
equipped with an automatic vent.
Close the filling valves (2 and 3) when the pressure in the system is between
1.0 - 1.5 bar.
In frost-sensitive installations, the system should be filled with glycol or brine
alcohol. Potash must never be used.

9.2 Venting the system

Bleed the radiators / floor heating coils carefully
from air so no air pockets remain. The heat pump
is equipped with an automatic vent. Ensure that
the automatic breather valve cap is screwed tightly
so that the air can come out. See section 22.
Components, item 34.
Check the system pressure and re-fill with water if the pressure has dropped.
If there are large amounts of air in the circulation system, the air can block the
circulation pump.
The compressor then stops with the message "Invert alarm (0)". Then turn off the
main switch, wait 10s, and turn it on again.
This may need to be repeated several times with a few hours or a few days apart.
Check the pressure again after some day and fill with water if the pressure drops.

9.3 Venting of hot water tank

Drainage of the tap water system takes place automatically as you open a
hot water tap in the house.
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service & maintenance