18
Depending on above inspection, service could also include a
cleaning and vacuuming of heat exchanger tubes and possibly the
heat exchanger drum section.
Removal of any heat exchanger components which are sealed by
gaskets requires replacement of gasket.
This furnace should never be operated without an air filter.
Disposable filters should be replaced at least once a year. If
equipped to provide cooling, filters should be replaced a minimum
of twice a year. Permanent filters should be cleaned at least twice a
year.
ALWAYS KEEP MAIN OIL VALVE TURNED OFF IF
BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF
TIME.
Step 2 — Oil Burner
For optimum performance, oil--burner nozzle should be replaced
once a year. Contact your service technician if you are unsure of
this procedure.
The procedure for nozzle installation and/or replacement is
outlined in oil burner instruction manual which came with furnace.
After replacement of nozzle, burner should be adjusted in
accordance with Combustion Check section of this instruction.
Step 3 — Heat Exchanger and Flue Pipe
Ordinarily, it is not necessary to clean heat exchanger or flue pipe
every year, but it is necessary to have your service technician check
unit before each heating season to determine whether cleaning or
replacement of parts is required.
If cleaning is necessary, the following steps should be performed:
BURN HAZARD
Failure to follow this caution may result in personal injury.
If furnace has been in operation, some surfaces may be
hot. Allow time for unit to cool down.
CAUTION
!
1. Turn off all oil and electrical supplies upstream of furnace.
2. Disconnect flue pipe.
3. Remove flue collar panel located in front part of furnace.
4. Remove baffle from secondary heat exchanger.
5. Disconnect oil line and remove oil burner from furnace.
6. Open 2 cleanout doors located in upper part of front panel
of furnace.
7. Clean secondary tubes, and primary cylinder with stiff
brush and vacuum cleaner.
8. Before re--assembly, the heat exchanger and combustion
chamber should be inspected to determine if replacement is
required.
9. After cleaning, replace baffle, flue--collar plate, oil burner,
and close the 2 cleanout access doors. Reconnect flue pipe
and oil line.
10. Re--adjust burner for proper operation.
Step 4 — Blower Removal
To remove blower from furnace:
1. Turn off all oil and electrical supplies upstream of furnace.
2. Remove burner access and blower door.
3. Remove blower retaining screw (on blower shelf).
4. Remove cover from control box and disconnect thermostat
and power wires from the board.
5. Slide blower forward on rails toward front of unit.
6. Reverse items 1 through 5 to re--install blower. Refer to
wiring diagram (See Fig. 14) of these instructions or dia-
gram located on inside of blower door to properly rewire
unit.
374RAN
