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Natco Fire-Coil Volume Water Heaters
Electronic Pilot
Figure 28. Flame patterns.
Figure 29. Gas valve/burner replacement.
Standing Pilot
Anti-Rotation
Bracket
4B. Replacement of Gas Controls
The gas and electric controls installed on the
heaters are designed for both dependable operation
and long life. Safe operation of the heater depends on
their proper functioning.
NOTE: The warranty does not cover damage
caused by lack of required maintenance or improper
operating practices.
WARNING
Never attempt to repair the gas valve. Such
attempts will void the warranty, and could lead to
dangerous results.
If the gas valve is found to be defective, replace
it by following these instructions.
1.
Turn off electrical power to the heater.
2.
Turn off the main gas supply at the manual gas
cock outside the heater jacket or at the meter.
3.
Remove the front access door on the heater.
4.
Turn off the gas valve to heater following the
instructions found on the inside of the heater.
5.
Disconnect the service union in the gas line, and
unscrew the main gas pipe from the gas valve
(see Figure 29).
Page 19
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