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15.
Checking the Refrigerant Circuit
a.
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.
b.
Check the humidity indicators on the sight glass. The refrigerant circuit has a
leak if that indicate a high level of humidity.
16.
Checking the Suction Gas Superheating
a.
Check and if required, adjust the suction gas superheating for each
compressor.
17.
Checking the HP Switch
a.
Deliberately choke the heating flow until the flow temperature rises above
55°C, each compressor should be stopped by its HP switch or AL05.
18.
Checking Heat Pump Cabinet
a.
Seal any holes that might have been drilled into the cabinet with permanently
flexible sealant, to prevent condensation forming in the heat pump inside.
19.
Checking the Cooling Operation (Heating & cooling unit
only)
a.
Check the settings on the control system, and adjust so there is a cooling
requirement.
b.
Check that the external circulation pumps start and that the compressor cools.
20.
Commissioning the DHW Cylinder System
a.
Fill domestic hot water cylinder. Check the RT, ST, HT parameters.
b.
DHW cylinder should has enough heat exchanging capacity and flow rate so
temperature difference delta T between HT and ST will not be over 5°C.
Commissioning and Adjusting
