4.2 Checking hot circuit
1. Check that condensers and subcoolers are correctly connected. Make sure that the
flow direction is correct.
Use the latest PI or flow diagram for reference.
2. Make sure that all transmitters in the hot water system are installed and connected.
3. Check that the component identification labels correspond to the PI diagram and
component tag list.
Mark off with green in the PI diagram.
4. Check that pressure relief valves have been installed in both condensers’ and
subcoolers’ liquid circuits to prevent increasing pressure when trapped liquid is
heated.
5. Check that all valves and other components displayed in the PI diagram have been
correctly installed.
Make sure that the valves can be operated at 0 – 100 %.
6. Check and note selected filter mesh size.
The recommended mesh size is 0.8 mm in closed circuits, and 0.08 mm in open
circuits.
7. Check that all flange and/or welded connections to the heat pump are properly
made and tightened.
8. Check the pipe insulation.
9. Make sure that all pipes are properly supported.
No stress must be transferred to the heat exchanger connections of the heat
pump.
10. Make sure that the pipes are vented.
4.3 Checking cold circuit
1. Check that the evaporators are correctly connected. Make sure that the flow
direction is correct.
Use the latest PI or flow diagram for reference.
2. Make sure that all transmitters in cold water system are installed and connected.
3. Check that the component identification labels correspond to the PI diagram and
component tag list.
Mark off with green in the PI diagram.
4. Check that all valves and other components displayed in the PI diagram have been
correctly installed.
Make sure that the valves can be operated at 0 – 100 %.
5. Check and note selected filter mesh size.
The recommended mesh size is 0.8 mm in closed circuits, and 0.08 mm in open
circuits.
6. Check that all flange and/or welded connections to the heat pump are properly
made and tightened.
7. Check the pipe insulation.
8. Make sure that all pipes are properly supported.
No stress must be transferred to the heat exchanger connections of the heat
pump.
9. Start the circulation pump and adjust the possible flow switch limit to approximately
50 % of the nominal flow.
If several heat pumps are connected, adjust the valves to achieve the specified
flow distribution.
10. Make sure that the pipes are vented.
CHS01 1951EN
25 (63)
