Viessmann BWT 221.A06, Installation And Service Instructions Manual

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45
Instantaneous heating water heater power supply 400 V~
N
L1
L2
L3
400 V / 50 Hz
3/N/PE
N2
L1
L2
L3
N1
N3
PE
PE
A
Connection area
B Jumpers
■ Max. fuse rating 16 A (see specifica-
tion).
■ Low tariff and power-OFF can be
used.
■ Recommended power cable:
5 x 2.5 mm 2
Max. cable length: 25 m
Instantaneous heating water heater power supply 230 V~
230V / 50 Hz
1/N/PE
N
L1
L1
L1
N
N
L1
N1
PE
PE
L1
N1
L1
N1
A Connection area
B Jumpers
■ Max. fuse rating 16 A (see specifica-
tion).
■ Low tariff and power-OFF can be
used.
■ Recommended power cable:
7 x 2.5 mm
2
Max. cable length: 25 m
Power supply with power-OFF
Power-OFF without on-site load disconnection
The power-OFF signal is connected
directly to the heat pump control unit.
The compressor will be "forced" OFF
when the power-OFF is active. Parameter "Output for instant. heating
water heater at power-OFF 790A"
determines whether and at what stage
the instantaneous heating water heater
stays operational during a power-OFF
period.
Installation sequence
Connecting power cables
(cont.)
5601 574 GB
Installation