Installation and operating instruction
Oil condensing boiler WTC-OB 18-B
5 Installation
83311002 1/2018-03 La
30-132
5.6 Electrical connection
DANGER
Risk of electric shock
Working on the device when voltage is applied can lead to electric shock.
Isolate the device from the power supply prior to starting any work.
Safeguard against accidental restart.
The electrical connection must only be carried out by qualified electricians. Ob-
serve local regulations.
Lay the bus line and external sensor cable separately and preferentially shielded,
connecting the screen only on one side to earthing strip.
Remove front panel [ch. 4].
Undo screws
1
and pull operating unit
2
forward.
Remove top panel
3
.
1
2
3
Guide the lines from the rear of the appliance through the recess to the wiring
duct.
Assign the inputs and outputs according to application [ch. 6.10].
Connect the cables according to the wiring diagram, in the process pay particu-
lar attention to the correct phase location of the voltage supply.