41
C
Interface to the separate cooling cir-
cuit or heating/cooling circuit
H
Interface to the heating circuits or
the heating water buffer cylinder
P
Interface to the primary circuit
W
Interface to the DHW cylinder
Equipment required
Pos.
Description
Heat source
1
Heat pump stage 1
2
Heat pump control unit
3
Outside temperature sensor
5
Circulation pump for cylinder heating (heating water side), heat pump stage
1
6
Secondary pump, heat pump stage 1
9
Heat pump stage 2
qP
Secondary pump, heat pump stage 2
Circulation pump for cylinder heating (heating water side), heat pump stage
2
qW
Safety equipment block with safety assembly
qE
Expansion vessel
qT
Primary pump, heat pump stage 1
qZ
Flow temperature sensor, primary circuit
qU
Return temperature sensor, primary circuit
wT
Primary pump, heat pump stage 2
Heat pump cascade integration
A heat pump cascade consists of a lead
appliance and lag heat pumps.
Each lag heat pump has a heat pump
control unit. Both lead appliance and lag
heat pumps can have 2 stages.
The lead appliance regulates the heat
pump operation within the cascade.
■ Up to 3 lag heat pumps when connect-
ing via KM BUS in conjunction with the
external H1 extension (see page 96
and separate service instructions for
Vitotronic 200 heat pump control unit).
■ Up to 4 lag heat pumps when connect-
ing via LON (see separate service
instructions for the Vitotronic 200 heat
pump control unit).
Preparing for installation
Integration of 2-stage version
(cont.)
5609 667 GB
Installation
