Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 80

Installation sequence
Power supply
(cont.)
230 V~ power supply, various tariffs
Three separate power cables
Selective power-OFF for compressor and instantaneous heating water heater
possible
The cross-section of the power cables must be appropriate for the connected
load of the relevant unit.
A Control unit
Recommended power cable: 3 x
2
1.5 mm
B Instantaneous heating water hea-
ter
Recommended power cable: 7 x
2
2.5 mm (see also page 83)
C Compressor
Recommended power cable: 3 x 4
2
mm
Control unit power supply
A Terminals in the control panel
80
Note
This supply must never be blocked.
Max. protection 16 A.