A.O. Smith 30 - Manual (Page 42)

Installation
42 Instruction manual SGS
3
is
3.12.5 Connecting tank sensor
Note
This sensor is already mounted in the tank prior to delivery. The sensor is
mounted between the inlet and outlet of the heat exchanger. However, you must
still connect the lead to the solar heating system controller.
1. Connect the sensor lead 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. Connect the sensor lead with the blade connectors 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") .
3.12.7 Connecting communication cable
Note
>The communication cable must always be connected, otherwise neither
the appliance nor the solar heating system controller will run.
1. Connect the double connector to J16.
2. Fit the cable in the strain relief.
3. Connect the other end of the communication cable to the terminal block of
the appliance. See:
-
connecting communication cable to appliance (3.11.9 "Connecting
communication cable to solar heating system")
- electrical diagrams (17.3 "Electrical diagram for the appliance") .
4. Connect the optional head pump (3.12.8 "Connecting extra head pump") or
QT sensor (3.12.9 "Connecting Q/T sensor") .
5. If you have no more connections to make:
- Fit the cap on the electrical terminal block.
- Fit the plastic covers onto the appliance.
3.12.8 Connecting extra head pump
Note
This pump is essential if a greater head is required. When the system has
such a high resistance (>110 kPa) that the pump in the pump station is
insufficient, you can connect a second (ON/OFF) pump to the solar heating
system controller.
1. Connect earth ( ), live and neutral to terminals 7 through 9.
2. Fit the cable in the strain relief.
3. If you need to connect an extra head pump continue
(3.12.9 "Connecting
Q/T sensor") , otherwise:
- Fit the cap on the terminal block.
- Fit the covers onto the appliance.