3 Troubleshooting (continued)
40
Table 3H Troubleshooting Chart - Combustion Levels
POSSIBLE CAUSE CORRECTIVE ACTION
Vent/Air Intake Length
or Obstruction
• Refer to the General Venting section of the Armor Water Heater Installation and Operation
Manual for the proper venting and air intake methods for the Armor water heater.
• Check for obstructions at the vent/air intake terminals.
Gas Supply Pressure
• Refer to the Gas Connections section of the Armor Water Heater Installation and Operation
Manual for the proper gas supply for the Armor water heater.
Dirty/Damaged Burner
• Refer to this manual for burner removal and cleaning procedures.
• Replace burner if necessary.
Gas Valve Adjustment
• Refer to this manual for the gas valve adjustment procedure.
Service Manual
Check flame and combustion
1. Turn the main power off to the water heater by placing the
“On/Off” switch in the OFF position.
2. Remove the flue temperature sensor from the flue pipe
connection. NOTE: Combustion measurements will be
made at this point.
3. Turn the main power on to the water heater by placing the
“On/Off” switch in the ON position.
4. Navigate to the Setup Screen from the Home Screen by
pressing the SETUP button along the left side of the screen.
Enter the installer password.
5. Select the Service Maintenance Screen. The tabs will scroll
(up and down) to reveal more options. See this manual for
more detailed information.
6. Insert the probe from a combustion analyzer into the hole
left by the removal of the flue temperature sensor.
Table 3G Flue Products Chart
7. Once the water heater has modulated up to full fire,
measure the combustion. The values should be in the range
listed in Table 3G below. The CO levels shall be less than
150 ppm for a properly installed unit.
If the combustion is not within the specified range, reference
the Troubleshooting Section of this manual for possible
causes and corrective actions.
8. Once the combustion analysis is complete, test the safety
shutoff device by turning the manual shutoff valve to the
OFF position and ensuring that the water heater shuts
down and registers an alarm. Turn the manual shutoff
switch to the ON position and reset the control.
9. Turn the main power off to the water heater and replace
the flue temperature sensor into the flue pipe connection.
10. Place the water heater back into normal operation.
You must replace the flue gas temperature
sensor to prevent flue gas spillage into the
room. Failure to comply could result in
severe personal injury, death, or substantial
property damage.
⚠ WARNING
Natural Gas Propane
CO
2
O
2
CO
2
O
2
8.4% - 9.4% 4.8% - 6.5% 9.4% - 10.4% 5.4% - 6.9%
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