Installation manual

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Integration of the Heat Pump in the Heating System 8.4.1
8.3.5 Dual differential pressureless manifold
In a heat pump, the dual differential pressureless manifold is a
useful alternative for the buffer tank connected in parallel, since
it fulfils the same function without compromising when it comes
to efficiency. The hydraulic isolation is realised using two
differential pressureless manifolds with a check valve each (see
Fig. 8.28 on p. 192).
Advantages of the dual differential pressureless manifold:
 Hydraulic isolation of the generator circuit and the consumer
circuit
 Operation of the circulating pump (M16) in the generator
circuit with the compressor in heating operation only, to
avoid unnecessary operation
 Possibility for a joint use of the buffer tank connected in
series by the heat pump and the additional heat generator
 Protection of the heat pump against too high temperatures
when external energy is fed into the buffer tank connected in
series
 Guarantee of the minimum compressor runtimes and
defrosting in all possible operating conditions through full
circulation of the buffer tank connected in series
 Interruption of the heating operation for the domestic hot
water and swimming pool water preparation so that the heat
pump is always operated with the lowest possible
temperature level.
NOTE
The hydraulic integration via two dual differential pressureless manifolds
offers maximum flexibility, operational safety and efficiency.
8.4 Hot Water Distribution System
The hot water distribution system consists of perfectly matched
individual components which can be combined according to
individual requirements. The maximum permissible heating
water flow of each component must be taken into account during
the dimensioning.
Buffer tank connection and assurance of heating
water flow
 Compact manifold
KPV 25 (recommended for up to 1.3m
3
/h)
 EB KPV differential pressureless manifold extension module
(recommended for up to 2.0m
3
/h)
 Dual differential pressureless manifold
DDV 32 (recommended for up to 2.5m
3
/h)
Heating distribution system module
 Unmixed heating circuit module
WWM 25 (recommended for up to 2.5m
3
/h)
 Mixed heating circuit module
MMH 25 (recommended for up to 2.0m
3
/h)
 Manifold bar for connecting two heating circuits
VTB 25 (recommended for up to 2.5m
3
/h)
Domestic hot water distribution system module
 Hot water module
WWM 25 (recommended for up to 2.5m
3
/h)
Manifold bar for KPV 25 and HHM 25 connection
VTB 25 (recommended for up to 2.5m
3
/h)
Extension modules for the distribution system
 Mixer module for bivalent systems
MMB 25 (recommended for up to 2.0m
3
/h)
 Solar station for hot water
SST 25
NOTE
The components of the hot water distribution system are shown in the
integration diagrams in Chap. 8.12 on p. 186 in dashed lines.
Fig. 8.2: Combination possibilities for the hot water distribution system
8.4.1 KPV 25 compact manifold
The compact manifold functions like an interface between the
heat pump, the heating distribution system, the buffer tank and,
in some cases, even the domestic hot water cylinder.
A compact system is used to simplify the installation process so
that a lot of different components do not have to be installed
individually.
Hot water preparation
Buffer tank
Unmixed heating circuit Mixed heating circuit
Heating boiler