A.O. Smith 30 - Manual (Page 39)

Instruction manual SGS 39
is
3.11.3 Connecting the mains voltage
The appliance is supplied without a power cable and isolator.
Note
In order to receive electrical power, the appliance has to be connected to the
mains power by means of a permanent electrical connection. A double-pole
isolator with a contact gap of at least 3 mm must be fitted between this
permanent connection and the appliance. The power cable must have cores of
at least 3 x 1.0 mm
2 .
Warning
Leave the appliance isolated until you are ready to start it up.
1. Connect phase (L), neutral (N) and earth ( ) of the power cable to terminals
22 through 24 of the connection block as indicated in the
table
(3.11.2 "Preparation") .
2. Fit the power cable in the strain relief.
3. Connect the power cable to the isolator.
4. If you have no more connections to make:
- Fit the cap on the electrical terminal block.
- Fit the plastic covers onto the appliance.
3.11.4 Isolating transformer
An isolating transformer should be used if there is a case of 'floating neutral'.
1. Refer to fitting instructions provided with the isolating transformer. (Contact
the supplier for details of the correct isolating transformer.)
2. Connect phase (L), neutral (N) and earth ( ) to terminals 16 through 21 of
the terminal block as stated in the table (3.11.2 "Preparation") .
3. Fit the cables in the strain relief.
4. If you have no more connections to make:
- Fit the cap on the electrical terminal block.
- Fit the plastic covers onto the appliance.
5. Connect the power cable to the isolator.
3.11.5 Connecting continuous pump
1. Connect phase (L), neutral (N) and earth ( ) to terminals 7, 8 and 9 as
stated in the table (3.11.2 "Preparation") .
2. Fit the cable in the strain relief.
3. If you have no more connections to make:
- Fit the cap on the electrical terminal block.
- Fit the plastic covers onto the appliance.
3.11.6 Connecting a program-controlled pump
1. Connect live (L), neutral (N) and earth ( ) to terminals 10, 11 and 12 as
indicated in the table (3.11.2 "Preparation") . This is for pump 8 in the
diagram.
2. Fit the cable in the strain relief.
3. If you have no more connections to make:
- Fit the cap on the electrical terminal block.
- Fit the plastic covers onto the appliance.