Pump 1 Pump 2 Warning
Light
Exhaust
Fan
Operation
Light
Pump 1 Pump 2 Warning
Light
Exhaust
Fan
Operation
Light
System controller
For connection to
Pump 1, see 1)
Circulation Pump Terminals 1,2
1) When operating with 1 circulation pump
* If there is only one pump, connect to
"Pump 1" terminals.
● Use these terminals to control the pumps in any circulating system.
Connected this way, the system controller will control the function of the pumps.
Use normally open relays (electromagnetic switches) to supply power to the
pumps.
Use thermal relays if necessary.
Connect them when they are used for recirculation system or storage tank
recirculation system.
● Use electromagnetic contactors / thermal relays suitable for the load.
When you connect one circulation pump, refer to page 10 (with RC-9018M) or page 23 (with RC-7649M).
2) When operating with 2 circulation pumps
The system controller carries out the alternate
operation of "pump 1" and "pump 2" at regular
time intervals by connecting two circulation
pumps.
When you connect two circulation pumps, refer to page 10 (with RC-9018M) or page 23 (with RC-7649M).
Connect to
terminals
circulation pump
Single phase AC120V or
Three phase AC240V
pump voltage etc.
Electromagnetic
contactor
Thermal relay
AC Power Supply
AC100-240V
Under 1A
Connect to
terminals
circulation pump
Single phase AC120V or
Three phase AC240V
pump voltage etc.
Electromagnetic
contactor
Thermal relay
AC Power Supply
AC100-240V
Under 1A
* Do not connect both of pumps 1 and 2
to the same terminal blocks.
15. Additional System Controller Features
System Controller Terminals (Optional Connections)
* Piping diagram for parallel pipe installation
Circulation Pump 1
Circulation Pump 2
(If necessary)
Flow control valve
Flow control valve
Adjust the pump flow with the flow control valves.
If multiple pumps are used, control the flow of each pump with separate valves.
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