26
Commissioning and Adjusting
Switch Off /Disconnect the Mains Fuse
Check Refrigerant Circuit for Leaks.
Check heat pump gas pressure gauge reading for any leak.
Open the front door with the key. Check the heat pump interior with a refrigerant leak detector or
leak detection spray for refrigerant leaks.
Filling the Heating System
Open any installed non-return valves
Check the inlet pressure of diaphragm expansion tank.
Thoroughly flush the heating system.
Fill the heating system with water and check the pressure. Minimum system pressure is 1 bar,
maximum pressure is 3 bar. Only use an anti-corrosion additive which has been approved for heat
pumps with DHW heating via single-walled heat exchangers.
Return the non-return valves into the operation position.
Checking the Diaphragm Expansion Tank and the System Pressure
Drain the indoor primary side of the heat pump system and reduce pressure until pressure gauge
indicates “0”.
If the inlet pressure of the diaphragm expansion tank is lower than the static system pressure,
replenish with sufficient nitrogen to raise the inlet pressure above the static system pressure.
Re-fill with water until the filling pressure is higher than the inlet pressure of the diaphragm
expansion tank.
During the initial start-up, mark this value on the pressure gauge as minimum filling value. Only
use anti-corrosion additive which has been approved for heat pumps with DHW heating via
single-walled heat exchangers.
Check the Function of all Safety Valves
Check the Water Connections for Leaks
Filling the Outdoor Side Circuit and Checking the Pressure
Fill the outdoor side circuit with brine and vent.
Check the circuit pressure. The pressure in outdoor side circuit should be approx 2 bar.
Check and if required, adjust the inlet pressure of the diaphragm expansion tank.
Commissioning and Adjusting
