Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 64

Installation sequence
Electrical connections in the heat pump control...
1. Route LV cables through opening "<
42 V" to the heat pump control unit
connection area.
2. Route 230 V cables through opening
"230 V" to the heat pump control unit
terminal area.
Note
Route LV cables and 230 V cables as
far apart as possible.
64
<42 V
3. Route power cable for compressor
through opening "400 V" to terminal
area. For power supply, see from
page 91.
(cont.)
230 V
400 V