8
HOM-SERIES Hot Water Heater module Operator's Manual
maintenance
fuel filter/Water separatOr:
Inspect bowl on fuel filter/water separator for water accumulation. If water exists,
unscrew drain valve on bowl to drain water, then close.
Burner air adJustment:
The air shutter has been factory preset for proper operation between sea level
and 2000 feet elevation at standard conditions (60°F ambient water and air tem-
peratures). In colder temperatures or higher altitudes, it may be necessary to
adjust the air supply to the combustion chamber. This adjustment will maximize
burner efficiency and avoid inefficient operation or excessive sooting of the heat
exchanger coil. A smoke spot test is recommended during any air shutter and
band adjustment. If you do not have the equipment to perform a smoke spot
test, follow the procedures listed below.
. The machine must be running and the burner ON.
2. Loosen the Locking Screw (#3) on the shutter.
3. Check for smoke from the heat exchanger exhaust. If smoke is
not present, slowly close the Air Shutter (#1) by moving the dial
counterclockwise to a lower number. Continue moving the dial until
smoke appears.
4. Record this setting.
5. Open Air Shutter (#) two increments. Example: If Air Shutter was
set at 2, move it to 4.
6. Slowly trigger the gun on and off. This will cause the burner to turn
on and off. Look for a smoke puff when the burner ignites.
7. Repeat steps 5 and 6 until a smoke puff is noticed. Record the Air
Shutter Setting.
8. The difference between the recorded settings in steps 4 and 7 is the
combustion window. Set the dial /2 way between these settings.
NOTE: If you are unable to detect a setting on either step 3 or 7, more or less
air may be needed to achieve a proper combustion window. Loosen the
Bolt (#4 at left) and open the Air Band (#2) in 1/4" increments. Repeat
steps 3-8 until proper combustion window is achieved.
Burner air adJustment