Pump 1 Pump 2 Warning
Light
Exhaust
Fan
Operation
Light
Pump 1 Pump 2 Warning
Light
Exhaust
Fan
Operation
Light
Connect to terminals
Operation light
AC Power Supply
AC100-240V
Under 1A
Operation Light Terminal
Warning Light Terminal
Connect to terminals
Warning light
AC Power Supply
AC100-240V
Under 1A
Pump 1 Pump 2 Warning
Light
Exhaust
Fan
Operation
Light
Connect to terminals
Exhaust Fan
(Ventilation Fan)
Relay
Thermal
Relay
Single phase AC120V
Three phase AC200V etc
AC Power Supply
AC100-240V
Under 1A
Exhaust Fan Terminal
● These terminals will close when any of the units are firing or when the fan on any of the units is blowing.
These terminals can be used to control an exhaust fan or damper in this way.
● Use a relay (electromagnetic contactor) to provide power to the fan or damper.
Use an additional thermal relay if necessary.
● Use the electromagnetic contactor / thermal relay suitable for the load.
System controller
● If you make the connections as shown above, the light
will turn on when a failure (error code) of any water
heater in the system is generated.
It will remain lit until the failure has been resolved.
If the light turns on, the failure must be resolved after
checking the remote controller for error code(s).
The light will also turn on if the power supply to the
system controller is cut off.
● If you make the connections as shown above, the light
will turn on and remain on any time the system is turned
on at the remote controller.
If the power button is turned off at the remote controller,
the light will turn off.
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