Lochinvar ARMOR 151 - 801 - Manual (Page 22)

2
Maintenance
Service Manual
22
2
Maintenance
Inspect ignition and flame sense
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.
Check ignition ground wiring
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 - Start-up of the Armor Water
Heater Installation and Operation Manual.
2. Verify cold fill pressure is correct and that operating
pressure does not go too high.
Check burner flame
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. 2-2 below.
4. When replacing the burner, ensure gasket is in good
condition and positioned correctly (FIG. 2-2).
Figure 2-2 Burner Assembly