10 Commissioning
10.1 Filling the water heater and heating system
1. Fill the water heater with cold water by opening the filler valve that is on the valve pipe.
2. Bleed by opening one of the hot water taps.
3. Then fill the water heater coil and the heating system with water through the filling valve to a pressure of
approx. 1 bar.
10.2 Bleed the heating system
1. Open all radiator valves fully.
2. Bleed all radiators.
3. Refill the heating system to a pressure of approximately 1 bar.
4. Repeat the procedure until all air has been removed.
5. Leave the radiator valves fully open.
10.3 Filling the brine system
Caution! Before filling the brine system, the electrical installation must be completed so that it is possible
to operate the brine pump.
Caution! Before filling the brine system for DHP-A, DHP-AL, the water heater MUST be filled.
Note! Always check local rules and regulations before using anti-freeze.
Note! Anti-freeze with corrosion protection additives must be used and mixed to achieve frost protection
down to -15°C for DHP-H, DHP-L and DHP-C..
Note! Use only ethylene glycol as anti freeze for DHP-A and DHP-AL, mixed to achieve frost protection
down to -32±1°C.
10.3.1 Calculated volume DHP-H, -C, -L
The volume of the brine system is calculated as follows:
•
Heat pump (exchanger and piping) approximately 2 litres
•
Expansion tank approximately 3 litres
•
Collector (single pipe): PEM 40 approximately 1.0 litre/m; PEM 32 approximately 0.6 litre/m; Cu 28 approxi-
mately 0.5 litre/m
10.3.2 Calculated volume DHP-A, -AL
The volume of the brine system is calculated as follows:
•
Heat pump (exchanger, pipe and outer jacket) approximately 47 litres
•
Expansion tank approximately 3 litres
•
Outdoor unit approximately 7 litres
•
Collector (single pipe): 28 mm pipe approx. 0.5 litre/m
Installation instructions VMBMA1002 – 63
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