A.O. Smith SGS - 100, Installation, User And Service Manual

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Instruction manual SGS 43
is
3.12.2 Connecting the mains power
Note
Just as with the water heater controller, the solar heating system controller
must have a permanent electrical connection to the mains power supply. There
must be a double-pole isolator installed in the permanent connection. This is the
same double-pole isolator as installed between the mains power supply and the
water heater itself. Whenever this isolator is operated, both controllers can be
switched on or off.
1. Connect earth, live and neutral to terminals 1 through 3
2. Fit the cables in the strain relief.
3. Connect the power cable to the isolator.
4. Continue (3.12.3 "Connecting pump station - modulating pump").
3.12.3 Connecting pump station - modulating pump
The pump station contains a modulating pump (
3:0FRQWUROOHG
). You must
connect this pump to the controller of the solar heating system.
1. Connect earth, live and neutral to terminals 10 through 12.
2. Connect
PWM- and PWM+ to terminals 1 and 2 of J18
.
3. Fit the cables in the strain relief.
4. Continue (3.12.4 "Connecting solar collector").
3.12.4 Connecting solar collector
Note
This sensor must be mounted in the solar collector;refer to the solar collector
installation manual.
Connect the sensor (S
1
) to the water heater as follows:
1. Connect the sensor to terminal 2 and 4 of J13.
2. Fit the cables in the strain relief.
3. Continue (3.12.5 "Connecting tank sensor").
3.12.5 Connecting tank sensor
Note
This sensor is not already mounted in the storage tank prior to delivery. The
sensor must be fitted between the inlet and outlet of the heat exchanger of the
storage tank. The sensor lead must also be connected to the solar heating
system controller.
1. Connect the lead for sensor S
2
with the blade connectors to the sensor.
2. Connect the other end to terminals 2 and 4 of J14.
3. Fit the cables in the strain relief.
4. Continue (3.12.7 "Connecting communication cable").
3.12.6 Connecting top tank sensor
1. Using the blade connectors, connect the sensor S
3
lead to the sensor.
2. Connect the other end to terminals 1 and 3 of J14.
3. Fit the cables in the strain relief.
4. Continue (3.12.7 "Connecting communication cable").