Service Manual
2Maintenance (continued)
Inspect ignition and flame sense Check burner flame electrodes
1.Remove the ignition and flame sense electrodes from the water heater heat exchanger access cover.
2.Remove any deposits accumulated on the ignition/flame sense electrode using sandpaper. If the electrodes cannot be cleaned satisfactorily, replace with new ones.
3.Replace ignition/flame sense electrode, making sure gasket is in good condition and correctly positioned.
1.Inspect flame through observation window.
2.If the flame is unsatisfactory at either high fire or low fire, turn off water heater and allow water heater to cool down. Remove the burner and clean it thoroughly using a vacuum cleaner or compressed air. Do not use compressed air to clean burner if performed inside a building.
3.Remove the burner, reference FIG.
4.When replacing the burner, ensure gasket is in good condition and positioned correctly (FIG.
Check ignition ground wiring
Figure 2-2 Burner Assembly
1.Inspect water heater ground wire from the heat exchanger access cover to ground terminal strip.
2.Verify all wiring is in good condition and securely attached.
3.Check ground continuity of wiring using continuity meter.
4.Replace ground wires if ground continuity is not satisfactory.
Check all water heater wiring
1. Inspect all water heater wiring, making sure wires are in good condition and securely attached.
Check control settings
1.Set the SMART SYSTEM control module display to Parameter Mode and check all settings. See Section 1 of this manual. Adjust settings if necessary. See Section 1 of this manual for adjustment procedures.
2.Check settings of external limit controls (if any) and adjust if necessary.
Perform start-up and checks
1.Start water heater and perform checks and tests specified in Section 10 -
2.Verify cold fill pressure is correct and that operating pressure does not go too high.
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