Technical data

70 | Project planning manual for heat pumps for heating and domestic hot water preparation | 01.2012 www.dimplex.de
6.3.2 Domestic hot water preparation with heat pumps
If the output of the photovoltaic plant is not sufficient, the domes-
tic hot water heat pump is operated exclusively with power from
the energy provider grid. Excess solar power is fed into the
power grid via an inverter.
In the case of domestic hot water heat pumps equipped with an
additional internal heat exchanger, a relay with a floating contact
automatically switches on a second heat generator according to
need.
Fig. 6.8: Connections and dimensions of the domestic hot water heat pump
equipped with an auxiliary internal heat exchanger
1)
alternative condensate guidance
Fig. 6.9: Connections and dimensions of the
BWP 30HLW domestic hot water heat pump equipped with an addi-
tional internal heat exchanger
6.3.2 Installation
Installation location criteria:
 The domestic hot water heat pump must be installed in a dry
and frost-free room.
 Furthermore, installation and air intake is not permitted in
rooms with air which is potentially explosive because of
gases, vapours or dust.
 In order to prevent damage to interior walls caused by
dampness, it is recommended to provide good thermal insu-
lation between the room into which the exhaust air is re-
leased and the neighbouring rooms.
 Condensate drainage (with a siphon) must be provided.
 Drawn-in air must not be excessively contaminated or con-
tain large amounts of dust.
 The load-bearing capacity of the foundation must be suffi-
cient (the weight of the filled domestic hot water heat pump
is approx. 450 kg!).
To ensure smooth operation and facilitate repair and mainte-
nance work, there should be minimum clearances of 0.6 m on all
sides of the device as well as a minimum room height of approx.
2.50 m for operation in “free venting” installation setup (without
air ducts/hoses or bends) with domestic hot water heat pump in-
stallation.
Fig. 6.10: Installation conditions for free process air intake and outlet.
*)
Minimum clearance between the air outlet in the air circuit bend
and the wall is 1.2 m
Air hoses can be optionally connected on both the air inlet and
the air outlet side. These should not exceed a total length of
10 m. Flexible, thermally-insulated and sound-insulated DN 160
air hoses are available as accessories.
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