Viessmann Vitotronic 300 Installation And Service Instructions Manual page 27

Vitotronic 300, GW5B Installation and Service
Power Supply
(continued)
A To the burner base unit
B Connecting cable
C To the Vitotronic control
Connecting the power supply to the burner base
For burner base unit, see boiler service
instructions
1. Check whether the power cable to the control unit has
appropriate fuse protection.
2. Connect the power cable at the junction box and plug
fÖ (on-site).
WARNING
Incorrect core allocation can cause severe injury and can
damage the appliance.
Take care not to interchange wires "L" and "N"
3. Insert plug fÖ into the control unit.
Control unit power supply connection
Insert plug fÖ and plug aBH of the mains filter unit
connecting cable into the appropriate control unit socket.
40/156 Control unit connecting cable
Route beneath the top B rail in a bundle
using plug-in cable retainers.
Installation Sequence
27