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Millbrook House, Grange Drive, Hedge End, Southampton, SO30 2DF
0844 879 3587
dimplex.co.uk | gdcgroup.co.uk
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• Flow and return isolation valves and piping must be tted to each of the heat pump water connections
on the back of the heat pump, as shown in gure 8.
• The isolation valve on the return is also tted with a non-return valve and a strainer (included in the
Dimplex heat pump hydraulics pack). This means that in order to clean the strainer, the system does
not have to be drained. Instead, it is possible just to close the isolation valves on the return and
remove the strainer. This way, the only water that will be lost from the system is that between the non-
return valve and strainer.
• The strainer must be tted in order to prevent contamination of the condenser heat exchanger. If an
alternative strainer is used, it must be at least 7 microns in size.
• System should be pressurised and the system pressure must be checked once valves are re-opened.
• Direct condensate drain pipe to soak away or drain.
• All piping must be properly insulated and external length kept to a minimum.
• The return isolation valve provided in the hydraulics pack has a built in strainer to help prevent debris
entering the condenser and must be tted.
Figure 8: Details of ow and return isolation valves
CAUTION: The quality of the water used to ll the heating system is of vital importance. Muddy or dirty
water, for example, from a freshly drilled well, is not suitable, as this can lead to the incorrect functioning of
some components and poses a corrosion risk to the system.
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