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Operating the Temperature Control System
Water Temperature Adjustment
The water temperature setting can be adjusted from 55°F
to 155°F. Turn the Gas Control/Temperature Knob to the
desired setting/temperature. See Figure 22 on page 20.
NOTE: The temperatures indicated are approximates. The
actual temperature of the heated water may vary.
Operating Modes and Settings
• Standard Mode - The controller adjusts the water heater
to maintain the temperature set by the user.
• Vacation Setting - The Vacation Setting (VAC) sets
the controller at approximately 55°F. This setting is
recommended when the water heater is not in use for a
long period of time. This effectively turns the controller
temperature setting down to a temperature that prevents
the water in the water heater from freezing while still
conserving energy.
Status Light Codes
Normal Flashes:
• 0 Flashes Indicates Control Off/Pilot Out.
• 1 Flash Indicates Normal Operation.
• Continuous Light indicates the gas control valve/thermostat
is shutting down.
Diagnostic Flashes: If the water heater is not working, look for
the following diagnostic flashes after lighting the pilot.
2 Flashes
4 Flashes
5 Flashes
7 Flashes
8 Flashes
9 Flashes
10 Flashes
Indicates thermopile voltage is low.
Indicates overheat failure.
Indicates water temperature sensor failure.
Indicates electronic control failure.
See "Status Light Code Troubleshooting Chart."
Indicates chamber temperature sensor circuit
is open or shorted.
Indicates an LDO occurrence was detected in
the combustion chamber (contaminants).
LIST OF STATUS CODES ARE SHOWN
AT TOP OF GAS CONTROL VALVE / THERMOSTAT.
STATUS LIGHT
FIGURE 22B.
21
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