Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 105

Power supply
(cont.)
Connecting power cables
The power supply is separated into two
areas with two power cables:
Recommended power cables:
Type
BW 121
BWS 121
BW 129
BWS 129
BW 145
BWS 145
Danger
Damaged cable insulation can
cause injury and damage to the
appliance.
Route cables so that they cannot
touch very hot, vibrating or sharp-
edged components.
Heat pump con-
trol unit (230 V~)
2
3 x 1.5 mm
—
3 x 1.5 mm 2
—
2
3 x 1.5 mm
—
Installation sequence
230 V~ 1/N/PE
400 V~ 3/PE
A Power supply to heat pump control
unit
B Power supply to compressor stages
1 and 2
Compressor (400 V~)
2
4 x 2.5 mm
2
4 x 2.5 mm
4 x 4.0 mm 2
2
4 x 4.0 mm
2
4 x 6.0 mm
2
4 x 6.0 mm
A
B
Max. cable length
50 m
50 m
50 m
50 m
40 m
40 m
105