
4
-- Using the functional modules, basic system diagram, start-up
82
Operating and installation instructions
sensoCOMFORT
0020288151_00
4.7.4
Heat pump as a single unit (hybrid)
With external back-up boiler
A back-up boiler (with eBUS) is connected via the
VR 32
(address 2).
A back-up boiler (without eBUS) is connected to the output for the heat pump or the heat pump control module for the ex-
ternal back-up boiler.
System property
Basic system diagram
code:
Without
heat ex-
changer
1)
With heat
exchanger
1)
Domestic hot water generation only provided by the back-up boiler without the functional module
–
Connecting the domestic hot water cylinder temperature sensor to a back-up boiler (separate charge
control)
8
10
Domestic hot water generation only provided by the back-up boiler with the functional module
–
Connecting the domestic hot water cylinder temperature sensor to a back-up boiler (separate charge
control)
9
10
Domestic hot water generation through the heat pump and back-up boiler
–
Connecting the domestic hot water cylinder temperature sensor to the
FM5
functional module
–
Without the
FM5
functional module, connecting the domestic hot water cylinder temperature sensor
to the heat pump control module and/or heat pump
16
16
Domestic hot water generation provided by the heat pump and back-up boiler with a bivalent domestic
hot water cylinder
–
Connecting the upper domestic hot water cylinder temperature sensor to a back-up boiler (separate
charge control)
–
Connecting the lower domestic hot water cylinder temperature sensor to the heat pump control
module and/or heat pump
12
13
1) E.g.
VWZ MWT
4.7.5
Cascade with heat pumps
Maximum seven heat pumps possible
With external back-up boiler
As of the second heat pump, the heat pumps and, if required, the heat pump control modules, are connected via the
VR 32
(B)
(address 2 to 7).
A back-up boiler (with eBUS) is connected via the
VR 32
(next free address).
A back-up boiler (without eBUS) is connected to the output for the first heat pump or the heat pump control module for the
external back-up boiler.
System property
Basic system diagram
code:
Without
heat ex-
changer
1)
With heat
exchanger
1)
Domestic hot water generation provided by the back-up boiler only
–
Connecting the domestic hot water cylinder temperature sensor to a back-up boiler (separate charge
control)
9
–
Domestic hot water generation through the heat pump and back-up boiler
–
Connecting the domestic hot water cylinder temperature sensor to the
FM5
functional module
16
16
1) E.g.
VWZ MWT
Содержание sensoCOMFORT VRC 720f
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