Connecting an extra on mode switch ("tank on"), Connecting an extra error signal ('alarm out' ) – A.O. Smith 30 User Manual
Page 40
Installation
40
Instruction manual SGS
3
is
3.11.7
Connecting an extra ON mode switch ("Tank ON")
Tank ON is a facility for connecting an external ON/OFF switch. In the OFF
position, the programmed operating state is active. In the ON position, the
programmed operating mode is overruled, and the "ON mode" is active.
1. Connect cables (X
1
and X
2
) to terminals 5 and 6 as indicated in the
table
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.
3.11.8
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
1
and X
2
) to terminals 13 and 14 according to
the table
. 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.
3.11.9
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
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.
3.12 Electrically
connecting the solar
heating system
controller
Topics covered in this paragraph:
•
•
•
Connecting pump station - modulating pump
•
•
•
•
Connecting communication cable
Optionally you can connect an extra head pump and Q/T sensor:
•
•