Operating The Temperature Control System - American Water Heater Ultra Low NOx MODELS Installation Instructions And Use & Care Manual

Operating the Temperature Control System

Figure 19: Status Codes
List of status codes are shown
at top of gas control valve/thermostat.
VAC
Water Temperature Adjustment
The water temperature can be adjusted from 55°F to 155°F.
Turn the Gas Control/Temperature Knob to the desired
setting/temperature.
Operating Modes and Settings
• Standard Mode - The controller adjusts the water
heater to maintain the temperature set by the user.
Vacation Setting - The controller adjusts the water
•
temperature to 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 water
heater down to a setting that prevents the water from
freezing.
Status Light Code
Normal Flashes:
• 0 Flashes Indicates Control Off/Pilot Out.
• 1 Flashes 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 Indicates Thermopile Voltage Low
4 Flashes Indicates Overheat Failure
5 Flashes Indicates Sensor Failure
7 Flashes Indicates Electronic Control Failure
8 Flashes See "Status Light Code Troubleshooting Chart."
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