Installation & Operation Manual
61
12
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. 12-2 below.
4.
When replacing the burner, ensure gasket is in good
condition and positioned correctly (FIG. 12-2).
Figure 12-2
Burner Assembly
Perform start-up and checks
1.
Start water heater and perform checks and tests specified
in Section 10 - 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.
Cleaning heat exchanger
1.
Shut down water heater:
• Follow the “To Turn Off Gas to Appliance” instructions
for the water heater in Section 10 - Startup.
• Do not drain the water heater unless it will be exposed
to freezing temperatures. If using freeze prevention
fluid in system, do not drain.
2.
Allow time for the water heater to cool to room temperature
if it has been firing.
3.
Remove the blower assembly (gas air/arm) from the heat
exchanger access cover. Set bolts aside.
4.
Remove the nuts securing the heat exchanger access cover to
the heat exchanger and set aside.
5.
Remove the heat exchanger access cover, cover gasket(s) and
chamber insulation assembly.
The water heater contains ceramic fiber
materials. Use care when handling these
materials per instructions in the Armor
Service Manual. Failure to comply could
result in severe personal injury.
6. Use a vacuum cleaner to remove any accumulation on the
water heater heating surfaces. Do not use any solvent.
7. Finish cleaning using a clean cloth dampened with warm
water.
8. Install access cover gasket, chamber insulation assembly and
cover.
9. Secure nuts on the studs. DO NOT overtighten.
10. Re-install the blower assembly (gas air/arm) using the bolts
set aside in Step 3.
11. Close isolation valves on piping to isolate water heater from
system. Attach a hose to the water heater drain and flush
water heater thoroughly with clean water by using purging
valves to allow water to flow through the water make-up line
to the water heater.
12. When the water heater has been flushed, restore water
heater to operation.
13. Perform start-up and check-out procedures in Section 10 -
Startup.
Oiled bearing circulators
1. The circulator shipped with the Armor water heater is water-
lubricated. No oiling is required.
2. Check other circulators in the system. Oil any circulators
requiring oil, following circulator manufacturer’s
instructions. Over-oiling will damage the circulator.
WARNING
