Lochinvar ArmorX2 1.5 - Manual (Page 35)

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. Go to the Setup Screen 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 9 - Start-up of the Armor X2 Installation and
Operation Manual.
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.
4. When replacing the burner, ensure gasket is in good
condition and positioned correctly (FIG. 2-2).
BURNER
AIR/GAS GASKET
FLAPPER VALVE
BURNER DOOR
BURNER DOOR
HEX NUT (6)
IGNITER
FLAME SENSE
IGNITER GASKET
FLAME SENSE
GASKET
FLAME SENSE
SCREW (2X)
IGNITER SCREW (2X)
DOOR FIBER
FLAPPER VALVE
SCREW (5X)
Figure 2-2 Burner Assembly
2
Maintenance
(continued)
35
Service Manual
Check flame signal
1. At high fire the flame signal shown on the display should be
at least 10 microamps.
2. A lower flame signal may indicate a fouled or damaged
flame sense electrode. If cleaning the flame sense electrode
does not improve, ground wiring is in good condition, and
ground continuity is satisfactory, replace the flame sense
electrode.
3. See Section 3 - Troubleshooting in this manual for other
procedures to deal with low flame signal.
Review with owner
1. Review the Armor X2 Installation and Operation Manual
with the owner.
2. Emphasize the need to perform the maintenance schedule
specified in the Armor X2 Installation and Operation
Manual (and in this manual as well).
3. Remind the owner of the need to call a licensed contractor
should the heater or system exhibit any unusual behavior.