Making The Electrical Connection - Viessmann KWT Vitocal 300-G Pro Installation And Service Instructions Manual

Installation sequence

Making the electrical connection

Danger
Damaged cable insulation can cause injury and
damage to the appliance.
Route cables so 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.
■ Route LV leads < 50 V and
50 V/230 V~/400 V~ cables separately.
>
Only strip the minimum of insulation from
■
cables as close as possible to the terminals
and bundle tightly to the corresponding termi-
nals.
■ Secure cables with cable ties/strain relief fit-
tings.
This ensures that, should there be a fault, for
example when detaching a wire, the wires can-
not drift into the adjacent voltage area.
Fig.30
1. Route LV leads through "< 50 V" entry to heat pump
wiring chamber.
2. Route 230 V cables through "230 V" entry to heat
pump wiring chamber.
Secure 230 V cables with cable ties.
Note
Route LV leads and 230 V/400 V cables as far
apart as possible.
36
When routing on-site power cables, observe the loca-
tion of the cable entries into the appliance through the
back panel (see page 14 to page 16).
400 V~
230 V~
<50 V
3. Route power cable for compressor through "400 V"
entry to the heat pump wiring chamber.
Always secure the power cable with strain relief fit-
tings.
Note
Additional strain relief fittings are required on site,
as the wall clearance is ≥ 80 mm.
For power supply, see from page 48.