Installation & Operation Manual
71
13
Maintenance
(continued)
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. 13-2 below.
4. When replacing the burner, ensure gasket is in good
condition and positioned correctly (FIG. 13-2).
DIR #2000585238 00
BURNER
GASKET
Figure 13-2
Burner Assembly
Perform start-up and checks
1. Start water heater and perform checks and tests specified in
Section 11 - Start-up.
2. Verify cold fill pressure is correct and that operating
pressure does not go too high.
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 the Armor Service
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.
The water heater contains ceramic fiber
materials. Use care when handling these
materials per instructions in the Service
Manual. Failure to comply could result in
severe personal injury.
⚠
WARNING
Cleaning heat exchanger
For recommended materials; including brush, appropriate
extension(s), refractory cover, and detailed instructions see
Table 13B - Heat Exchanger Cleaning Kits.
1. Shut down water heater:
• Follow the “To Turn Off Gas to Appliance” instructions
for the water heater in Section 11 - Startup.
• Do not drain the water heater unless it will be exposed
to freezing temperatures. If using freeze protection
fluids in the system, do not drain.
2. Allow time for the water heater to cool to room temperature
if it has been firing.
3. Remove the nuts securing the heat exchanger access cover
to the heat exchanger and set aside.
4. Remove the heat exchanger access cover, burner, and
gas/air arm assembly.
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 TOUCH control module display to
Parameter Mode and check all settings. See Section 1 of
the Armor Service Manual. Adjust settings if necessary.
See Section 1 of the Armor Service Manual for adjustment
procedures.
2. Check settings of external limit controls (if any) and adjust
if necessary.
5. Remove the condensate hose from the heat exchanger end.
Connect a field supplied 3/4" diameter hose to a drain pan.
Using field supplied means, cover the refractory in the back
of the combustion chamber of the heat exchanger.
6. Use a vacuum cleaner to remove any accumulation on the
water heater heating surfaces. Do not use any solvent.