Viessmann Vitocal 252-A Series - Page 92

92
Outdoor unit: Compressor power supply 230 V~/400 V~
Danger
Risk of explosion: Electrical components can
cause sparks which may be ignited by escaping
refrigerant.
Before inserting or removing the power supply
plug, isolate the system from the power supply
e.g. at the separate fuse or main switch. Check
that the system is no longer live.
!
Please note
Incorrect phase sequence can cause damage to
the appliance.
Connect the 400 V~ compressor power supply
only in the phase sequence specified (see ter-
minals) with a clockwise rotating field.
■
Outdoor unit terminal area: See chapter "Cable rout-
ing to the terminal area".
■
Shield the power cable from direct sunlight.
Outdoor unit with 1 fan
Compressor power supply 230 V~
N
L
1/N/PE 230 V/50 Hz
Recommended power cable
3 x 2.5 mm
2
Or
3 x 4.0 mm
2
Max. cable length
■
For 3 x 2.5 mm
2
20 m
■
For 3 x 4.0 mm
2
32 m
Max. fuse rating 16 A
Outdoor unit with 2 fans
Compressor power
supply
230 V~ 400 V~
L1 N PE
PE
L1 L2 L3 N
1/N/PE 230 V/50 Hz 3/N/PE 400 V/50 Hz
Recommended power cable
3 x 2.5 mm
2
Or
3 x 4.0 mm
2
5 x 2.5 mm
2
Max. cable length depends on power cable
3 x 2.5 mm
2
20 m —
3 x 4.0 mm
2
32 m —
5 x 2.5 mm
2
— 30 m
Max. fuse rating B25A 16 A
Electrical connections
Power supply (cont.)
6222080
Installation