Installation manual
198
8.12.7
Renewable back-up for heating and domestic hot water preparation
Preconfiguration
Setting
Fig. 8.38: Integration diagram for bivalent renewable heat pump operation of a solid fuel boiler with renewable cylinder, a
heating circuit with buffer tank connected in series and domestic hot water preparation
Operating mode
Bivalent
renewa
ble
1. Heating circuit 1 Yes
2. Heating circuit 1 No
Hot water
preparation
Yes
Request Sensors
Flange heater Yes
Swimming pool
preparation
No
The renewable cylinder (3.1) is
loaded by either the solid fuel
boiler or by additional heat
generators (e.g. solar). The
buffer tank volume should be
dimensioned according to data
from the solid fuel boiler
manufacturer.
With a sufficiently high
temperature level in the
renewable cylinder the heat
pump is blocked and the energy
from the cylinder is used for
heating requests, hot water
requirements and swimming
pool needs.
Renewable back-up for heating and domestic hot water preparation
Preconfiguration
Setting
Fig. 8.39: Integration diagram for mono energy heat pump operation with PWD 750 combo tank for external back-up heating
and domestic hot water preparation.
Operating mode
Mono
energy
1. Heating circuit 1 Yes
2. Heating circuit 1 Yes
3. Heating circuit 1 No
Hot water
preparation
Yes
Request Sensors
Flange heater Yes
Swimming pool
preparation
No
A separating plate integrated
into the combo tank in
combination with a 3-way valve
prevents mixing losses between
the heating and the hot water
zones.
With external charging heat riser
pipes distribute the external
energy to the supplementary
heating system and the hot
water preparation on the basis
of the temperature.
A flange connection enables the
installation of the RWT 750 solar
heat exchanger.
The heating circuit pump M15
supplies the flow around the
return flow sensor and prevents
the heat pump from switching on
when the system temperatures
are too high.
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