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Table 21 – Gas Rate (CU ft./hr)
SIZE OF TEST DIAL
SEC.
FOR
1
2
5
1
Cu
Cu
Cu
REV.
Ft.
Ft.
Ft.
10
360
720
1800
11
327
655
1636
12
300
600
1500
13
277
555
1385
14
257
514
1286
15
240
480
1200
16
225
450
1125
17
212
424
1059
18
200
400
1000
19
189
379
947
20
180
360
900
21
171
343
857
22
164
327
818
23
157
313
783
24
150
300
750
25
144
288
720
26
138
277
692
27
133
267
667
28
129
257
643
29
124
248
621
30
120
240
600
31
116
232
581
32
113
225
563
33
109
218
545
34
106
212
529
35
103
206
514
36
100
200
500
37
97
195
486
38
95
189
474
39
92
185
462
40
90
180
450
41
88
176
439
42
86
172
429
43
84
167
419
44
82
164
409
45
80
160
400
46
78
157
391
47
76
153
383
48
75
150
375
49
73
147
367
SERVICE AND MAINTENANCE
PROCEDURES
Untrained personnel can perform basic maintenance functions such
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. A qualified service person
should inspect the furnace once a year.
!
WARNING
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
The ability to properly perform maintenance on this
equipment requires certain knowledge, mechanical skills,
tools, and equipment. If you do not possess these, do not
attempt to perform any service and maintenance on this
equipment other than those procedures recommended in the
Owner's Manual.
SIZE OF TEST DIAL
SEC.
FOR
1
2
5
1
Cu
Cu
Cu
REV.
Ft.
Ft.
Ft.
50
72
144
360
51
71
141
355
52
69
138
346
53
68
136
340
54
67
133
333
55
65
131
327
56
64
129
321
57
63
126
316
58
62
124
310
59
61
122
305
60
60
120
300
62
58
116
290
64
56
112
281
66
54
109
273
68
53
106
265
70
51
103
257
72
50
100
250
74
48
97
243
76
47
95
237
78
46
92
231
80
45
90
225
82
44
88
220
84
43
86
214
86
42
84
209
88
41
82
205
90
40
80
200
92
39
78
196
94
38
76
192
96
38
75
188
98
37
74
184
100
36
72
180
102
35
71
178
104
35
69
173
106
34
68
170
108
33
67
167
110
33
65
164
112
32
64
161
116
31
62
155
120
30
60
150
CAUTION
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental
pollution.
Remove and recycle all components or materials (i.e. oil,
refrigerant, control board, etc.) before unit final disposal.
CAUTION
!
ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in improper
furnace operation or failure of furnace.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation.
WARNING
!
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow this warning could result in personal
injury or death, or property damage.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position and
install a lockout tag.
disconnect switch. Lock out and tag switch with a suitable
warning label.
Verify proper operation after servicing.
Always reinstall access doors after completing service and
maintenance.
General
These instructions are written as if the furnace is installed in an
upflow application. An upflow furnace application is where the
blower is located below the combustion and controls section of the
furnace, and conditioned air is discharged upward. Since this
furnace can be installed in any of the 4 positions shown in Fig. 2,
you must revise your orientation to component location
accordingly.
Electrical Controls and Wiring
Each pressure switch is labeled with the reference location (noted
as "COLLECTOR BOX- -LPS" or "HOUSING- -HPS" on the
switch). The nominal break point of each switch is shown on the
label below the reference location in inches of water column,
"W.C." The maximum and minimum break point of the switch is
+/- - 0.05 inches of water column from the nominal break point of
the switch. The maximum make point of the switch is 0.10 inches
of water above the maximum break point of the switch.
Example: Nominal break point on pressure switch is 0.68- -in.
W.C. The minimum break point of the switch is 0.63- -in. W.C.
The maximum break point of the switch is 0.73- -in. W.C. The
maximum make point of the switch is 0.83- -in. W.C.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
There may be more than one electrical supply to the furnace.
Check accessories and cooling unit for additional electrical
supplies that must be shut off during furnace servicing. Lock
out and tag switch with a suitable warning label.
61
There may be more than one
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