Technical data
128 | Project planning manual for heat pumps for heating and domestic hot water preparation | 01.2012 www.dimplex.de
8.15.10 Integration of the heat pump in the heating system
8.15.10 parallel connection of heat pumps
parallel connection of heat pumps
A higher heat or cooling requirement can be met by connecting
heat pumps in parallel.
A parallel connection of heat pumps is possible without a
higher-level regulation by the existing heat pump managers:
The same heating curves are set for all heat pump manag-
ers
Using the "Warmer" and "Colder" arrow buttons, heat pumps
which are additionally used for domestic hot water and
swimming pool water preparation should be set in such a
way that the return set temperature is 1 K lower.
In systems with swimming pool water preparation, the return
sensor in the heating circuit must be switched to an addi-
tional sensor in the swimming pool circuit during swimming
pool water preparation.
A higher-level load management is normally used for the fol-
lowing requirements:
Combination of different heat sources
Individual power control with adjustable compressor switch-
on and/or switch-off times
Central domestic hot water preparation via all heat pumps
connected in parallel
Planning for parallel connection
On request, Dimplex offers the following services (to be charged
as planning services) for the cascading of heat pumps with spe-
cial requirements placed on the regulation system:
Creation of a regulation concept with specification of the hydrau-
lic integration for parallel connection of Dimplex heat pump sys-
tems for heating and cooling with a maximum of 14 heat pumps.
Dual differential pressureless manifold
Pre-confi-
guration
Setting
Fig. 8.55: Integration diagram for heat pumps connected in parallel, a buffer tank connected in series with two manifolds with-
out differential pressure and domestic hot water preparation
Heat pump 1.1 1.2
Operating
mode
pipe
heating
None
Immer-
sion
heater
in the
buffer
1st heating
circuit
Heat-
ing
Heating
2nd heating
circuit
No
Domes-
tic hot
water
Domestic
hot water
No
yes via
sensor
Swimming
pool
No No
Domestic hot water preparation
is carried out by the heat pump
only.
With brine-to-water heat pumps
each heat pump has its own
brine circulating pump. A joint
borehole heat exchanger or
ground heat collector system is
used as a heat source.
1%
5
1%
5
11
(
1%
5
0
7
7
7
1%
5
7
1
11
(
7&
1%
11
0
7
1%
5
7
1
1%
5
7
11
0
11
0
Performance level Contact position
0 = heat pump off
ID1 open
ID2 open
1 = heat pump on with 1 compressor
ID1 closed
ID2 open
2 = heat pump on with 2 compressors and
2nd heat generator
ID1 open
ID2 closed