2
Maintenance
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 7 - Start-up of the Outdoor 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).
IMG00447
AIR / GAS ARM
SCREWS
(QTY. 5)
GASKET
BURNER
HEAT EXCHANGER
ACCESS COVER
INSULATION
Figure 2-2 Burner Assembly
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. Emphasize the need to perform the maintenance schedule
specified in this manual.
2. Remind the owner of the need to call a licensed contractor
should the water heater or system exhibit any unusual
behavior.
3. Remind the owner to follow the proper shutdown procedure
and to schedule an annual start-up at the beginning of the
next heating season.
Outdoor Armor Water Heater Service Manual
Содержание Knight 151
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