Note:
All the temperature indicators will be off during normal
operation. If any time you see the indicators on, there may
be a system error and you should consult the
“Troubleshooting Guide” section of this document, or con-
tact a trained service professional.
There is a hot-water scald potential if the thermostat is set
too high. In households with children, disabled or the elder-
ly, select a lower temperature setting. Valves for reducing
point-of-use temperature by mixing hot and cold water are
available. Consult a licensed plumber or the local plumbing
authority.
Heater Shutdown
1. Turn off all electrical power to the heater or unplug the
power cord from the receptacle.
2. Turn the manual gas supply valve to the water heater to
the “OFF” position.
System Error Codes
The computer inside the gas control monitors the ignition
sequence, temperature settings and overall operation of the
heater. If any of these parameters does not operate proper-
ly the computer will shut down the water heater and flash an
error code. See the “Intelli-Vent
TM
System Error Codes” and
“Troubleshooting Guide” to diagnose the problem before
attempting corrective action. See also “Resettable Lockout”.
– 24 –
WARNING
Scald burns occur in under one second with
71°C (160°F) water, which this thermostat will
deliver if the temperature is set at “VERY
HOT”. Lower settings of the temperature will
reduce the risk of scald and will reduce your
fuel bill.
SYMPTOM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
An open earth ground circuit to
the ignition system.
1. Check that the earth ground conductor is properly connected at the
fuse box or breaker panel and the water heater.
2. Check that the grounding conductors on the water heater are prop-
erly connected and secure.
The self diagnostic test detect-
ed a wiring error, reversed
polarity or a high resistance to
earth ground.
1. Check for proper connection of the line neutral and line hot wires.
2. Check that the appliance is securely connected to earth ground.
Error 1
Error 2
Error 3
The pressure switch remained
closed longer than 5 seconds
after the call for heat began.
Blower does not start.
1. The pressure switch wiring is incorrect.
2. The pressure switch is defective and must be replaced.
Table 4
Intelli-Vent
TM
System Error Codes.
Intelli-Vent
TM
System Error Codes
