Giant Manual
37
System Maintenance
To protect yourself from harm, before performing maintenance:
Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the
circuit breaker. (The temperature controller does not control the electrical power.)
Turn off the gas at the manual gas valve, usually located immediately below the water heater.
Turn off the incoming water supply. This can be done at the isolation valve immediately below the water
heater or by turning off the water supply to the building.
WARNING
Keep the appliance area clear and free from combustible materials, gasoline, and other
flammable vapors and liquids.
WARNING
The appliance must be inspected annually by a licensed professional. Repairs and maintenance should be per-
formed by a licensed professional. The licensed professional must verify proper operation after servicing.
Air Screen Inspection, Detection & Cleaning
A. Inspection:
To maintain optimum performance, periodically
inspect the HTT Engine Air Screen.
If the Air Screen appears to have lint and/or dust
build up, follow the cleaning procedure described
in step C.
If the air screen appears damage, contact a quali-
fied service provider for a replacement air filter
assembly (Part No. 108000030)
B. Detection: (Controller Flashing 05 or 13)
Flashing error code 05 or 13 may be an indication
that the Air Screen is dirty or restricting air flow to
the water heater. Follow the cleaning procedure
described in Step C.
If the controller continues to flash 13 after clean-
ing the Air Screen, turn off the unit and contact a
qualified service provider.
C. Cleaning:
1. Power OFF the water heater
Push the round power button located on the
right hand side of the controller.
Display will go blank when the power is off.
2. Remove the Air Screen Door
Slide the door latch to the right
Swing the door open and pull the door off the
water heater front panel.
3. Clean the Air Screen
With mild dish soap and a soft bristle brush,
scrub the screen area of the Air Screen Door.
With clean water, rinse the soap off the screen.
4. Dry the Air Screen
With a lint free towel, dry the lint screen
5. Inspect and Replace the Air Screen
Inspect the air screen for any debris that may
restrict air flow to the unit.
If the screen still appears dirty repeat Step 3
Replace the Air Screen Door by aligning the tab
at the right of the Air Screen Door with slots on
the water heater panel. With the latch slid to the
right rotate the door to the closed position and
lock the door in place by sliding the latch the left.
6. Power ON the water heater.
NOTE:
Do not operate this water heater
if the Air Screen is not in place.
