
4
Figure 6(b): Label
Figure 6(a): Plumbing with isolation valve with
strainer to be fitted to return pipe
Heat pump
Base plate
Solid concrete plinth
Flexible condensate drain pipe Ø 35mm, 1m
long (supplied), should be fitted to 0.5m below
ground to allow soakaway
Hole for condensate drain (minimum 40mm
diameter)
Hole for cable feed
In figure 5, there are four fixing holes Ø 16mm
(centre 140mm from long edge, 55mm from short
edge and 190mm from centre to centre for each pair)
and one centre hole for the condensate pipe. The
minimum recommended plinth dimensions are
1000mm (500mm to centre) x 470mm (235mm to
centre) x 100mm.
3.6 Plumbing – Preparation
When selecting piping to install with the heat pump
please ensure that:
The pipe sizes are adequate to allow the correct
nominal water flow rate through the heat pump.
The safety group and expansion vessel (space
heating side) are accurately sized by the
installer based on the system volume (these are
not supplied by Dimplex).
External pipework and valves should be
adequately insulated with vapour resistant
insulation and protected against damage to
prevent excessive heat losses. All joints should
be suitably sealed and exposed pipework must
be avoided.
Existing hot water systems should be flushed
prior to connection to the heat pump to remove
all contaminants and impurities, in accordance
with the latest version of MIS3005. Ensure the
water out and water in pipes are positioned
correctly for connection to the heat pump as
shown on the label in figure 6(b) and on the
back of the heat pump 6(a).
Figure 5: Position of hole fixings and condensate drain
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