Viessmann Vitocal 242-S - Page 9

9
Cable lengths in the internal/external unit plus wall clearance
Cables Internal unit External unit
Power cables:
■ Heat pump control unit (230 V~) 2.0 m –
■ Compressor (230 V~/400 V~) – 1.5 m
Other connecting cables:
■ 230 V~, e.g. for circulation pumps 2.0 m –
■ < 42 V, e.g. for sensors 2.0 m –
Internal/external unit connecting cable:
■ 12 V BUS 2.5 m 1.5 m
■ 43 V BUS 2.5 m 1.5 m
Recommended power cables
Type AWT-AC 241.A04 to A13, B10, B13
Heat pump control unit (internal unit) 230 V~
Cable cross-section
■ Without power-OFF
3 x 1.5 mm
2
■ With power-OFF
5 x 1.5 mm
2
Instantaneous heating water heater
Cable cross-section
■ 400 V~
5 x 2.5 mm
2
■ 230 V~
7 x 2.5 mm
2
Max. cable length 25 m
Type AWT-AC 241.A04 241.A07 241.A10 241.A13
External unit 230 V~ (compres-
sor)
Cable cross-section
3 x 2.5 mm
2
3 x 2.5 mm
2
3 x 2.5 mm
2
3 x 4.0 mm
2
Max. cable length 29 m 25 m 20 m 20 m
or or
Cable cross-section – –
3 x 4.0 mm
2
3 x 6.0 mm
2
Max. cable length – – 32 m 30 m
Type AWT-AC 241.B10 241.B13
External unit 400 V~ (compressor)
Cable cross-section
5 x 2.5 mm
2
5 x 2.5 mm
2
Max. cable length 30 m 30 m
Preparing for installation
Requirements regarding on-site connections (cont.)
5546 699 GB
Installation