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SUF SERVICE HANDBOOK
OPERATION
Technical Training Department State Water Heaters
STC-077
16 Ashland City, Tennessee © 2004
CONTROLS
NORMAL INDICATIONS / READINGS / SETTINGS
During Call for Heat
• On/Off switch in the “on” position
• Water Temperature F° — current average
tank water temperature displayed
• 120 VAC LED light on
• 24 VAC LED light on
• High Limit/Vent Switch LED light on
• Blower (while blower is running) LED light
on
• Air Pressure Switch (while blower is
running) LED light on
• Control Status LED light on
• Gas Valve (during ignition period and
heating cycle) LED light on
DISPLAY PANEL (CONTROL PANEL)
The water temperature inside the tank must be below the current temperature setting to activate a
call for heat. Pressing the Set/Reset button approximately 4 – 6 seconds after powering up the
water heater will reveal the current temperature setting. See the instructions below for how to view
or change temperature settings.