7
Automatic air release valves
In order to ensure that no air clogs occur in the outdoor circuit system and that the heat pump
does not signal an alarm as a result, it is necessary to install automatic air release valves on the
outdoor circuit. The air release valves must be installed at the highest points of the circuit.
Outdoor circuit pump
The outdoor circuit pump is included in the heat pump set and is installed in the device at the
factory. The Grundfos UPM3 pump (see, Annex No 2) is the most commonly used for the outdoor
circuit, and the UPMXL heat pumps with a capacity of more than 11 kW (see, Annex No 2). The
circulation pump is controlled by the central processor while maintaining optimal flow. The control
system monitors the operation of the circulation pumps and a warning is received in the event of a
deviation.
INTERNAL CIRCUIT
To avoid gas formation, it is recommended not to use galvanised pipe systems.
WARNING!
The area of the domestic hot water tank heat exchanger must correspond to the capacity of
the heat pump. The water capacity must be such that the heat output of the heat pump is
transmitted as efficiently as possible.
NOTE
Integrate the hot water tank into the heat pump system to match the heating system scheme
you have selected (see, pages 14-17).
Heating system filling
Set the pressure of the heating circuit in the expansion vessel to 1.5 bar.
Usually the
replenishment of the heating circuit is stationary, pre-connected to the water inlet, in which case the
replenishment takes place individually according to the system. If the filler in the heating circuit is not
water, then the system is filled with the appropriate liquid. As an additional protection against
freezing, in some cases the water in the heating system may be mixed with glycol, however, this
concentration should not exceed 15%. In this case, the efficiency of the heat pump decreases.
