Viessmann Vitocal 300 AWO-M-AC 301.A, Installation And Service Instructions Manual

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1. Remove contact shield C .
2. Route 230 V~ power cable through
cable fitting
B and apply strain
relief.
230 V/ 50 Hz
N
1 / N / PE
L1
N
L3
L2
L1
A
?
?
3. Connect cores to power supply ter-
minals
A in the control panel.
4.
Fit contact shield
C
.
5. If a seal is required (if economy tariff
with power-OFF is utilised), guide the
seal wire through holes
D in both
studs.
■ On-site fuse protection in accordance
with the compressor rating (see spec-
ification).
Note
The upstream fuses must have B char-
acteristics.
■ No parameters need to be set when
using economy tariff with power-OFF.
During the power-OFF period, the
compressor is shut down.
■ Recommended power cable: Flexible
3 x 4.0 mm
2
for cable lengths up to
20 m. A larger cable cross-section is
required for cable lengths > 20 m.
Power supply with power-OFF
Power-OFF without on-site load dis-
connection
The power-OFF signal is connected
directly to the heat pump control unit.
The compressor is "forced" off when
power-OFF is enabled.
Parameter "Output for instant. heating
water heater at power-OFF 790A"
determines whether and at what stage
the instantaneous heating water heater
(accessory) stays operational.
Installation sequence
Power supply
(cont.)
5692 875 GB