Viessmann Vitocal 300-G Installation And Service Instructions Manual page 92

Installation sequence
Power supply
(cont.)
Lower entry area F for 1 to 3 power
cables. Cable length approx. 1.50 m
plus wall clearance.
1. Remove the front, top and side
panel (see page 59).
2. Remove contact shield C from
mains terminals A and B.
3. Fit cable fittings (in the pack) to the
entries F in the back panel.
4. Guide the power cables through
the cable fittings from the back into
the appliance (see page 11) and
apply strain relief.
Power supply with power-OFF (without on-site load discon-
necting switch)
Connection of the power-OFF signal immediately in the control unit (with recog-
nition on the software side): Mechanical compressor shutdown through the
power-OFF contact in the control unit. Observe the technical connection condi-
tions of the relevant power supply utility. The way the instantaneous heating
water heater shuts down can be determined via parameter 790A (see
page 158).
92
5. Guide the power cables through
cable retainer E to the following
terminals:
A Control unit mains terminals
B Compressor mains terminals
D Control module for the instanta-
neous heating water heater
with mains terminals (acces-
sory)
6. Bundle and secure the power
cables with the cable ties supplied
and make the connections.