Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual page 26

Preparing for installation
Siting
(cont.)
Electrical connection requirements
Recommended power cables
Note
■ The specified cross-sections and max.
cable lengths apply to routing in empty
pipes or ducts at an ambient tempera-
ture of up to 25 °C.
■ In the case of routing in the vicinity of
heating pipes or encapsulated routing,
the cross-sections and max. cable
lengths must be recalculated (on site).
Load circuit (400 V~) on site, control circuit (230 V~) fully wired at the factory
Type
BW 301.A090, BW 302.A090
WW 301.A125, WW 302.A125
BW 301.A120, BW 302.A120
WW 301.A155, WW 302.A155
BW 302.A150
WW 302.A200
BW 302.A180
WW 302.A250
BW 302.A250
WW 302.A300
In conjunction with power-OFF: Load circuit (400 V~) and control circuit
(230 V~) on site
Type Control circuit
(230 V~)
Cable cross-sec-
tion
BW 301.A090
5 x 2.5 mm
BW 302.A090
WW 301.A125
WW 302.A125
BW 301.A120
5 x 2.5 mm
BW 302.A120
WW 301.A155
WW 302.A155
26
Load circuit (400 V~)
Cable cross-section
5 x 25 mm 2
2
5 x 35 mm
2
5 x 50 mm
2
5 x 70 mm
With cable lug for M8
2
5 x 95 mm
With cable lug for M8
Load circuit (400 V~)
Cable cross-section
2
5 x 25 mm
2
5 x 35 mm
max. cable length
40 m
40 m
40 m
40 m
40 m
Max. cable
length
2 40 m
2 40 m