Thermostat; Sequence Of Operation - A.O. Smith TC-049R3 Service Handbook

RESIDENTIAL GAS AND ELECTRIC WATER HEATER
Residential Electric – continued
C-2 Circuit – Standard on most single element
water heaters.
•
Single Element
•
Single Thermostat
•
Single High Limit
Operation from a cold tank of water.
C-
2 CIRCUIT
Post 1995
High Limit – L1 and L3
Through High Limit
L1 to T2 and L3 to L4

Thermostat

T2 Contacts
Open
A.O. Smith Water Products Company
©2005
SERVICE HANDBOOK
Normal Sequence of Operation
Power Enters
T2 Contacts Closed
Power To Element
Element Heats Water
Thermostat Satisfies
T2 Contacts Open
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.
Technical Training Department
29
WIRING DIAGRAM
Ashland City, TN