Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
5 Installation
83309302 1/2018-05 La
46-196
5.7 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.
The preferred Bus line to be used is the 4 wire RJ11 shielded bus line (accessory).
Run bus lines and external sensors separately and preferentially using shielded
lines, placing the shield on to the existing shield plate.
DANGER
Risk of fire due to incorrect bus installation
Bus installation with RJ11 distributor (hub) can lead to overheating of electrical
components and cables.
Do not use a distributor (hub) for bus installation.
Install the bus line of the WEM components as a line structure [ch. 5.7.2].
Switch off switch S1
1
.
Turn screw
2
90° anticlockwise.
Remove cover from the electrical installation duct.
1
2
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. 12.5].
Connect the cables according to the wiring diagram, in the process pay particu-
lar attention to the correct phase location of the voltage supply.
Secure the cables with the screw terminals for tension relief supplied.