10.4.2 Calculate volume
For DHP-H, DHP-L and DHP-C the volume of the brine system is calculated as follows:
▪
Heat pump (exchanger and piping) approximately 2 litres
▪
Bleed and expansion tank approximately 3 litres
▪
Collector (single pipe):
▪
PEM 40 approximately 1.0 litre/m
▪
PEM 32 approximately 0.6 litre/m
▪
Cu 28 approximately 0.5 litre/m
10.4.3 Calculate volume for outdoor heat pumps
For DHP-A the volume of the brine system is calculated as follows:
▪
Heat pump (exchanger, pipe and outer jacket) approximately 47 litres
▪
Expansion vessel approximately 3 litres
▪
Outdoor unit approximately 7 litres
▪
Collector (single pipe): 28 mm pipe approximately 0.5 litre/m
▪
40 mm PEL hose (between heat pump an outdoor unit) approximately 1 litre/m
10.4.4
Filling device
When the filling device is installed on the return pipe, remember to turn the strainer cover upwards in order to minimise the amount of
air that gets into the brine system when cleaning the filter.
A Shut-off valve
B Shut-off valve
C Dirt strainer with shut off valve
Installation Guide Domestic heat pumps
Danfoss Heating Solutions VMGFQ102
53
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