Relay Selection For The Pump Control Connection - A.O. Smith T-M50 ASME Service Manual

12-18. Relay selection for the pump control connection

The maximum current capacity of the T-M50's
pump control connection in the central computer
boar 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 1A
(1,000mA).
Through this circuit, the maximum current
capacity is 1A
Re-circulation pump terminals
T-M50 / T-M50 ASME Service Manual
Power supply for relay
Normally 120 VAC
72
CONFIDENTIAL
Ver. 1.05
Power supply for pump
120 VAC
220 VAC etc.
120 VAC
220 VAC etc
For relay
Re-circulation pump