D. COMBUSTION-AIR BLOWER
Clean periodically to assure proper airflow and heating efficiency.
Inspect blower wheel every fall and periodically during the heating
season. For the first heating season, inspect blower wheel bi-
monthly to determine proper cleaning frequency.
To inspect blower wheel, remove draft hood assembly. Shine a
flashlight into opening to inspect wheel. If cleaning is required,
remove motor and wheel as follows:
1. Remove unit access panel (See Fig. 32).
2. Remove the 7 screws that attach induced-draft motor
mounting plate to blower housing (See Fig. 33).
3. Slide the motor and blower wheel assembly out of the
blower housing (See Fig. 33). Clean the blower wheel. If
additional cleaning is required, continue with Steps 4 and 5.
4. To remove blower, remove 2 setscrews.
5. To remove motor and cooling fan assembly, remove 4
screws that hold blower housing to mounting plate.
6. To reinstall, reverse the procedure outlined above.
E. LIMIT SWITCH
Remove unit access panel. Limit switch is located on the blower
partition.
F. BURNER IGNITION
Unit is equipped with a direct spark ignition 100 percent lockout
system. Ignition module is located in the control box. Module
contains a self-diagnostic LED. During servicing, refer to label
diagram for LED interpretation.
If lockout occurs, unit may be reset by either momentarily
interrupting power supply to unit or by turning selector switch to
OFF position at the thermostat.
G. MAIN BURNERS
At the beginning of each heating season, inspect for deterioration
or blockage due to corrosion or other causes. Observe the main
burner flames and adjust, if necessary.
TABLE 14—582A WET COIL PRESSURE DROP
UNIT SIZE
582A
AIRFLOW
(CFM)
PRESSURE DROP
(IN. WG)
018
500 0.049
600 0.070
700 0.095
024
700 0.077
800 0.100
900 0.127
030
900 0.065
1000 0.080
1100 0.097
036
1100 0.084
1200 0.100
1300 0.177
042
1300 0.103
1400 0.120
1500 0.138
048
1500 0.088
1600 0.100
1700 0.113
060
1900 0.108
2000 0.120
2100 0.132
TABLE 15—583A WET COIL PRESSURE DROP
UNIT SIZE
583A
AIRFLOW
(CFM)
PRESSURE DROP
(IN. WG)
024
700 0.0535
800 0.067
900 0.123
030
900 0.0687
1000 0.083
1100 0.150
036
1100 0.084
1200 0.100
1300 0.177
042
1300 0.099
1400 0.177
1500 0.204
048
1500 0.199
1600 0.137
1700 0.156
060
1900 0.108
2000 0.120
2100 0.132
Fig. 30—Cooling Charging Chart, 583A060 Units
C00054
SUCTION LINE PRESSURE (KILOPASCALS)
SUCTION LINE PRESSURE (PSIG)
-14 1016212732
SUCTION LINE TEMPERATURE (°F)
SUCTION LINE TEMPERATURE (°C)
689
620
551
483
414
345
276
207
100
90
80
70
60
50
40
30
30 40 50 60 70 80 90
OUTDOOR TEMP
° F ° C
115 46
45 7
55 13
65 18
75 24
95 35
105 41
85 29
(060) 60HZ CHARGING CHART
Fig. 31—Blower Housing and Flue Collector Box
C99022
INDUCED DRAFT MOTOR MOUNT
VENT HOOD
IN SHIPPING
LOCATION
FLUE
COLLECTOR
BOX
BLOWER
HOUSING
BURNER
RACK
MOUNTING
SCREW
ROLLOUT
SWITCH
—27—
(72 Seiten)
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