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Commission each primary circuit as follows (not applicable to Direct models):
Fill each primary circuit (e.g. boiler, heat pump or solar circuits) following each heat
source manufacturers’ instructions.
Check for leaks in each primary circuit and rectify as necessary.
Commission each heat source in accordance with the manufacturer
’s instructions
activating the system controls as required.
10
Activate each heat source to confirm that the system controls function correctly.
11
Check that, while the cylinder is heating up, no water exits from either the expansion
relief or the temperature and pressure relief valves, and that the system controls
deactivate all heat sources when the cylinder is up to temperature.
7.3
Draining
Isolate all electrical supplies before draining the cylinder / secondary (hot water) circuit.
1
Close the mains water stopcock.
2
Connect hose to the drain cock and route to a suitable discharge.
3
Open the drain cock.
4
Open the hot water tap nearest the cylinder. If water fails to drain, vent the system by
opening the temperature and pressure relief valve.
5
Allow the system to drain fully then close the drain cock when complete.