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Checking the Refrigerant Circuit
Observe the sight glass in refrigerant circuit. Bubbles >5 mm should not be visible, when heating
flow has stabilized at 35°C. If large bubbles are visible, search and repair the leak in respective
stage and refill with refrigerant.
Check the humidity indicators on the sight glass. The refrigerant circuit has a leak if that indicate a
high level of humidity.
Checking the Suction Gas Superheating
Check and if required, adjust the suction gas superheating for each compressor.
Checking the HP Switch
Deliberately choke the heating flow until the flow temperature rises above 55°C, each compressor
should be stopped by its HP switch or AL05.
Checking Heat Pump Cabinet
Seal any holes that might have been drilled into the cabinet with permanently flexible sealant, to
prevent condensation forming in the heat pump inside.
Commissioning and Adjusting
