Relay Selection For The Pump Control Connection - A.O. Smith 710 ASME Service Manual

12-14. Relay selection for the pump control connection

The maximum current capacity of the 710 models
pump control connection is 1 amp.
Before using relay with the pump control, please
check the specifications of that particular relay to
ensure that the current value through the coil will
not exceed 1 amp.
For example
To the right, there is a sample of relay
specifications from an arbitrary brochure. You
can select either the 120 VAC or 240 VAC relay,
because their current values are less than 1 A
(1,000 mA).
Through this circuit, the maximum current
Connect to this "Pump" connector.
capacity is 1 A
710 / 710 ASME Service Manual
Power supply for relay
Normally 120 VAC
These components are not included with water
heaters and are external to the unit. They
must be acquired separately.
66
CONFIDENTIAL
Ver. 1.00
Power supply for pump
120 VAC
220 VAC etc
120 VAC
220 VAC etc
Thermal relay
Recirculation
pump