Electrically Connecting The Solar Heating System Controller - A.O. Smith SGS - 100 Installation & Service Manual

3
3.11.7
3.11.8
3.12 Electrically
connecting the solar
heating system
controller
3.12.1
Power n.a.
L N - -
1 2 3 4 5
1 2 3 4
J3
38
Installation
Connecting an extra error signal ('Alarm OUT' )
Alarm OUT is a potential free terminal that is switched when an error is
detected. This can be used to signal errors, for example with a lamp. A 230 V
circuit can be directly powered. Other voltages require a relay prescribed by
the manufacturer.
1. Connect the phase cables (X
the table (3.11.2 "Preparation"). If required, connect earth ( ) to terminal 15.
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.
Connecting communication cable to solar heating system
You must connect a communication cable between the controllers of the
appliance and the solar heating system.
1. Connect the cables (X5 and X6) to terminals 1 and 2 as indicated in the
table (3.11.2 "Preparation").
2. Fit the cable in the strain relief.
- If you do not need to make any more connections:
- Fit the cap on the terminal block.
- Fit the covers onto the appliance.
Topics covered in this paragraph:
• Preparation
• Connecting the mains power
• Connecting pump station - modulating pump
• Connecting solar collector
• Connecting tank sensor
• Connecting top tank sensor
• Connecting communication cable
Optionally you can connect an extra head pump and Q/T sensor:
• Connecting extra head pump
• Connecting Q/T sensor
Preparation
Undo the screws of the cap over the terminal block of the collector. This has the
following terminals:
Pump ON/OFF Modulating pump
- L N
1
6 7 8 9 10
1 2 3 4
J12
and X ) to terminals 13 and 14 according to
1 2
L N M - -
2
11 12 13 14 15
1 2 3 4
J13
is
n.a.
- - - - -
16 17 18 19 20
1 2 3 4
J14
Instruction manual SGS