Power Supply With Power-Off: With On-Site Load Disconnect - Viessmann Vitocal 300-A Series Installation And Service Instructions For Contractors
Air/water heat pump with electric drive, 400 v
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Also See for Vitocal 300-A Series:
- Installation and service instructions manual (212 pages) ,
- Installation and service instructions for contractors (124 pages) ,
- Operating instructions manual (60 pages)
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Power supply
(cont.)
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
Power supply with power-OFF: with on-site load disconnect
The power-OFF signal is connected to the on-site con-
tactor of the economy tariff power supply and to the
heat pump control unit. The compressor and instanta-
neous heating water heater are "forced" off when
power-OFF is enabled.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
X3.7
A
X3.6
3
D
3
G
kWh
E
3/N
F
4
Fig. 35
Diagram excluding fuses and RCD
Heat pump control unit
A
Instantaneous heating water heater
B
Compressor
C
Heat pump control unit power supply
D
Premium tariff meter
E
Backup fuse, ripple control receiver
F
Ripple control receiver (contact open: power-OFF
G
enabled) TNC system feed
Economy tariff meter
H
Feed: TNC system
K
Installation sequence
B
C
5
3
kWh
3/N
H
4
4
K
4
41
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