RESIDENTIAL GAS AND ELECTRIC WATER HEATER
SERVICE HANDBOOK
A.O. Smith Water Products Company
Training Department
©
2002
Ashland City, Tennessee
22
Residential Electric – continued
Normal Sequence of Operation
C-2 Circuit –
Standard on most single element
water heaters.
•
Single Element
•
Single Thermostat
•
Single High Limit
Operation from a cold tank of water.
WIRING DIAGRAM
Note: If used on a normally two element heater,
controls will be located behind the upper service
cover and the element behind the lower service
cover.
Power Enters
High Limit – L1 and L3
Through High Limit
L1 to T2 and L3 to L4
Thermostat
Post 1995
T2 Contacts
Open
C
-
2 CIRCUIT
Power To Element
Element Heats Water
Thermostat Satisfies
T2 Contacts Open
T2 Contacts Closed
