Heat Pump As A Single Unit (Hybrid); Cascade With Heat Pumps - Vaillant sensoCOMFORT VRC 720 Manual De Uso E Instalación

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-- Using the functional modules, basic system diagram, start-up
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
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)
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)
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
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
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
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)
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
1) E.g. VWZ MWT
24
Operating and installation instructions sensoCOMFORT 0020287900_00
Basic system diagram
code:
Without
With heat
1)
heat ex-
exchanger
1)
changer
8
10
9
10
16
16
12
13
Basic system diagram
code:
Without
With heat
1)
heat ex-
exchanger
1)
changer
9
16
16

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