21
WARNING:
Lubrication of the motors in this unit is not
required. Do not lubricate any motor in this
product.
Blower Compartment —
The blower compartment should
be cleaned monthly during the heating and cooling seasons
to remove any dirt and lint that may have accumulated in
the compartment or on the blower and motor. Buildup of
dirt and lint on the blower and motor can create excessive
loads on the motor resulting in higher than normal operating
temperatures and possible shortened service life.
Heat Exchanger and Burner Maintenance —
The
unit should operate for many years without excessive
scale buildup in the heat exchanger, however, the heat
exchanger, the vent system, and the burners should
be inspected and cleaned (if required) by a qualifi ed
serviceman annually to ensure continued safe operation.
Particular attention must be given to identify deterioration
from corrosion or other sources.
Vent Cover Assembly —
Inspect and clean the screen of
the vent cover assembly at the beginning of each heating
and cooling seasons.
Condensate Drain and Outdoor Coil —
Inspect the
condensate drain and outdoor coil at the beginning of each
cooling season. Remove any debris. Clean the outdoor
coil and hail guard louvers (optional) as necessary using a
mild detergent and water. Rinse thoroughly with water.
Electrical —
Inspect the electrical connections for
tightness at the beginning of each heating and cooling
season. Service as necessary.
CAUTION:
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Motor Lubrication —
The motors for the circulating air
blower, outdoor fan, and combustion blower are pre-
lubricated at the factory. No further oiling is required for
the life of this product.
Table 8. Gas Flow Rate (Cubic Feet Per Hour).
GAS FLOW RATE (CUBIC FEET PER HOUR)
TIME FOR ONE
REVOLUTION
(SECONDS)
CUBIC FEET PER REVOLUTION OF METER
TIME FOR ONE
REVOLUTION
(SECONDS)
CUBIC FEET PER REVOLUTION OF METER
1
5
10
1
5
10
10
360
1800
3600
66
55
273
545
12
300
1500
3000
68
53
265
529
14
257
1286
2571
70
51
257
514
16
225
1125
2250
72
50
250
500
18
200
1000
2000
74
49
243
486
20
0
900
1800
76
47
237
474
22
164
818
1636
78
46
231
462
24
150
750
1500
80
45
225
450
26
138
692
1385
82
44
220
439
28
129
643
1286
84
43
214
429
30
120
600
1200
86
42
209
419
32
113
563
1125
88
41
205
409
34
106
529
1059
90
40
200
400
36
100
500
1000
92
39
196
391
38
95
474
947
94
38
191
383
40
90
450
900
96
38
188
375
42
86
429
857
98
37
184
367
44
82
409
818
100
36
180
360
46
78
391
783
102
35
176
353
48
75
375
750
104
35
173
346
50
72
360
720
106
34
170
340
52
69
346
692
108
33
167
333
54
67
333
667
110
33
164
327
56
64
321
643
112
32
161
321
58
62
310
621
114
32
158
316
60
60
300
600
116
31
155
310
62
58
290
581
118
31
153
305
64
56
281
563
120
30
150
300