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RESIDENTIAL GAS AND ELECTRIC WATER HEATER
SERVICE HANDBOOK
A.O. Smith Water Products Company Training Department
©2002 Ashland City, Tennessee
23
Residential Electric – continued
A-6 Circuit
• 2 Elements
• 2 Thermostats
• 1 High Limit
Operation: From cold tank of water
A-
6 CIRCUIT
Power Interrupted to
Upper Element
Upper Thermostat, 1,
2 Open
Switch Power to Lower
Thermostat – Upper
Thermostat
,
1
,
4 Closed
Lower Thermostat
Contacts Open
Through High Limit
Lower Thermostat
Contacts Closed
Upper Thermostat
1, 4 Contacts Open
1, 2 Contacts Closed
Power to Upper Element
Element Heats Water
Upper Thermostat Satisfied
Power Interrupted
to Lower Element
Lower
Thermostat
Satisfied
Lower 1, 2 open
Element Heats
Water
Power to Lower
Element
Power Enters High-Limit