Install Instructions

Installation & Operation Manual
69
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
For recommended materials; including brush, appropriate
extension(s), refractory cover, and detailed instructions see
Table 12B - Heat Exchanger Cleaning Kits.
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 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.
IMG00549
BURNER
GASKET
AIR/GAS ARM
SCREWS
(QTY. 5)
NUTS
(QTY. 6)
HEAT EXCHANGER DOOR