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WARNING: Failure to replace any heat exchanger gas-
kets with new gaskets when any heat exchanger plates or
covers are removed could lead to heat exchanger leakage,
sooting, and/or a hazardous condition capable of causing
bodily harm.
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.
II. 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 out-
lined in oil burner instruction manual which came with furnace.
After replacement of nozzle, burner should be adjusted in accor-
dance with Combustion Check section of this instruction.
III. 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:
1. Turn off all oil and electrical supplies upstream of furnace.
CAUTION: If furnace has been in operation, some
surfaces may be hot. Allow time for unit to cool down.
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 two 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 two cleanout access doors. Reconnect flue
pipe and oil line.
10. Re-adjust burner for proper operation.
IV. 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 (Fig. 3 or Fig. 4) of these instructions or
diagram located on inside of blower door to properly rewire
unit.
TABLE 12—AIRFLOW DATA (CFM)
UNIT
SIZE
BLOWER
SPEED
EXTERNAL STATIC PRESSURE IN. WC
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
036105
High 1425 1350 1305 1250 1170 1030 925 805
Med-High 1130 1045 1000 950 885 820 745 670
Med-Low 840 810 770 740 685 635 580 500
Low 725 730 740 745 730 715 690 665
060120
High 2080 2041 1965 1864 1702 1576 1474 1336
Med-High 1892 1859 1770 1675 1550 1449 1330 1217
Med-Low 1556 1475 1394 1318 1211 1134 1051 938
Low 1221 1164 1081 998 926 855 782 653
NOTES:
1. Airflow values in cubic ft per minute (CFM) rounded to nearest 5 CFM.
2. Data taken with filters in place.
—11—