Lochinvar Shield SWA150, Инструкция по установке и обслуживанию

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Table 12G Flue Products
78
12
Troubleshooting
Combustion Analysis Procedure
1. Shut the water heater down by pressing the UP button for
five (5) seconds.
2. Locate the flue sensor in the vent connection. Remove
the flue sensor and grommet from the unit. Note:
Combustion measurements will be made at this point.
3. Place the water heater in active position by pressing the
UP button for five (5) seconds.
4. Press ENTER plus the UP button for five (5) seconds to
enter Service Mode.
5. Insert the probe from a combustion analyzer into the
hole left by the removal of the flue temperature sensor.
6. Once the water heater has modulated up to full fire,
measure the combustion. The values should be in the
range listed in Table 12G. The CO levels should 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.
Table 12H
Troubleshooting Chart - Combustion Levels
POSSIBLE CAUSE CORRECTIVE ACTION
Vent/Air Intake Length
or Obstruction
• Refer to Section 2 - General Venting for the proper venting and air intake methods for the
Shield water heater.
• Check for obstructions at the vent/air intake terminals.
Gas Supply Pressure • Refer to Section 6 - Gas Connections for the proper gas supply for the Shield water heater.
Dirty/Damaged Burner
• Refer to page 66 of this manual for burner removal and cleaning procedures.
• Replace burner if necessary.
Gas Valve Adjustment • Refer to page 79 of this manual for the gas valve adjustment procedure.
You must replace the flue sensor to prevent
flue gas spillage into the room. Failure
to comply could result in severe personal
injury, death, or substantial property
damage.
⚠ WARNING
Installation & Service Manual
7. Once the combustion analysis is complete, exit Service
Mode.
8. Replace the flue sensor and grommet into the vent
connection.
9. Place the Shield water heater back into normal operation.
Natural Gas
Input Rate
Target Range
CO
2
O
2
CO
2
O
2
High Fire
9.2% 4.5% 9.0% - 10.5% 2.1% - 4.8%
Low Fire
9.0% 4.8% 8.8% - 9.5% 3.9% - 5.2%
Propane
Input Rate
Target Range
CO
2
O
2
CO
2
O
2
High Fire
10.8% 4.5% 10.5% - 11.5% 3.5% - 5.0%
Low Fire
10.5% 5.0% 10.0% - 11.0% 4.2% - 5.8%