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~)
–
1.5 m
Other connecting cables:
230 V~, e.g. for 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
Vitocal 242-S, type AWT-AC
241.A04
241.A07
241.A10
241.A13
External unit
(compressor)
230 V~
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
Heat pump control unit
(inter-
nal unit) 230 V~
Cable cross-section
■ Without power-OFF contact
3 x 1.5 mm
2
3 x 1.5 mm
2
3 x 1.5 mm
2
3 x 1.5 mm
2
■ With power-OFF contact
5 x 1.5 mm
2
5 x 1.5 mm
2
5 x 1.5 mm
2
5 x 1.5 mm
2
Instantaneous heating water
heater
Cable cross-section
■ 400 V~
5 x 2.5 mm
2
5 x 2.5 mm
2
5 x 2.5 mm
2
5 x 2.5 mm
2
■ 230 V~
7 x 2.5 mm
2
7 x 2.5 mm
2
7 x 2.5 mm
2
7 x 2.5 mm
2
Max. cable length
25 m
25 m
25 m
25 m
Overview of possible system schemes
The following table provides an overview
of
all
possible system schemes.
Preparing for installation
Requirements regarding on-site connections
(cont.)
5623 661 GB
Installation
