A.O. Smith TWI 35-130, Instruction Manual

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30 Instruction manual TWI 35-130 G/TWI 45-190 G
3.10.3 Connect the mains voltage
The device is delivered without power cable and main switch.
Remark
In order to supply voltage to the device, connect the device to the mains
voltage using a permanent electrical connection. Place a double pole main
switch with a contact opening of min. 3 mm between this permanent connection
and the device. The power cable shall have a core of min. 3 x 1.0 mm².
Warning
Keep the device electrically isolated until you are ready to start it up.
1. Connect phase (L), zero (Z) and earth ( ) of the power cable to the
connector (C).
2. Mount the power cable into the strain relief (D).
3. Connect the power cable to the main switch.
4. Remount the cover plate.
3.10.4 Isolating transformer
An isolating transformer is used when a ‘ fl oating zero’ is present. Consult the
mounting instructions delivered with the isolating transformer (contact the
supplier for the correct isolating transformer).
Remark
Fill the device before starting up the device and/or checking the CO
2
-value
(5 “Fill”) .
Caution
Checking the CO
2
-value is obligatory when starting up the device for the
fi rst time.
Remark
You obviously need a CO
2
-gauge for checking the CO
2
-value.
3
3.11 Check and
adjust the
CO
2
-value
Installation