Viessmann BW 301.B06, Installation And Service Instructions Manual

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24
Preparing the electrical connections
Cables
■ For cable lengths and cable cross-sections, see the
following tables.
■ For accessories:
Cables with the required number of cores for exter-
nal connections.
Prepare an on-site distribution box.
Danger
Damaged wiring insulation wiring can lead to
serious injury from electrical current and result in
appliance damage.
Route cables so that they cannot touch very hot,
vibrating or sharp-edged components.
Danger
Incorrect wiring can lead to serious injury from
electrical current and result in appliance dam-
age.
Take the following measures to prevent drifting
of wires into the adjacent voltage area:
■ Route LV leads < 42 V separately from cables
>
42 V/230 V~/400 V~ and secure with cable
ties.
■ Only strip the minimum of insulation from
cables as close as possible to the terminals
and bundle tightly to the corresponding termi-
nals.
■ If 2 components are connected to the same
terminal, press both cores together in a
single
wire ferrule.
Required cable lengths in the heat pump plus wall clearance
Type BW/BWC 301.B BWS 301.B
Heat pump control unit power supply 230 V~ 1.0 m
—
Compressor power supply 400 V~ 1.0 m 1.0 m
Additional connecting cables 1.0 m
—
Recommended power cables
Power supply Cable Max. cable length
Compressor 400 V~
5 x 2.5 mm
2 50 m
Heat pump control unit
230 V~
■
Without power-OFF
3 x 1.5 mm
2 40 m
■
With power-OFF
5 x 1.5 mm 2
40 m
Instantaneous heating water heater 400 V~
5 x 2.5 mm 2
50 m
Installation sequence
Electrical connection
5516461
Installation