Viessmann VITOCAL 151-A Installation And Service Instructions Manual page 62

Installation sequence
Power supply
(cont.)
N
L1
L
N
?
?
Fig. 52
Types
All types
Compressor power supply: Outdoor unit 400 V~
!
Please note
Incorrect phase sequence can cause damage to
the appliance.
Make the compressor power supply only in the
phase sequence specified (see terminals) with a
clockwise rotating field.
62
Cable
3 x 2.5 mm
3 x 4.0 mm
Recommended power cable: H07RN-F
■
The use of PVC cable is not permissible.
■ Do not use wire ferrules.
Core wire PE must be longer than both the core
wires L and N.
Shield the power cable from direct sunlight.
■
Max. cable length
20 m
2
Or
32 m
2
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 MCB/fuse or mains isolator.
Check that the system is no longer live.
Max. fuse rating
B25A