Table of Contents
Advertisement
Table 10–GAS RATE (CU FT/HR)
SIZE OF TEST DIAL
SECONDS
FOR 1
1
2
REVOLUTION
Cu Ft
Cu Ft
10
360
720
11
327
655
12
300
600
13
277
555
14
257
514
15
240
480
16
225
450
17
212
424
18
200
400
19
189
379
20
180
360
21
171
343
22
164
327
23
157
313
24
150
300
25
144
288
26
138
277
27
133
267
28
129
257
29
124
248
30
120
240
31
116
232
32
113
225
33
109
218
34
106
212
35
103
206
36
100
200
37
97
195
38
95
189
39
92
185
40
90
180
41
88
176
42
86
172
43
84
167
44
82
164
45
80
160
46
78
157
47
76
153
48
75
150
49
73
147
→
e. Furnace should cycle off within 2 minutes. If gas does not
shut off within 2 minutes, determine reason draft safeguard
switch did not function properly and correct condition.
f. Remove blockage from furnace vent elbow.
g. Switch will auto-reset when it cools.
→
h. Re-install vent connector.
→
NOTE: Should switch remain open longer than 3 minutes,
furnace control board will lockout the furnace for 3 hours. To reset
furnace control board, turn thermostat below room temperature or
from HEAT to OFF and turn 115v power OFF, then back ON.
3. Check Pressure Switch
This control proves operation of the draft inducer blower.
a. Turn off 115-v power to furnace.
b. Disconnect inducer motor lead wires from wire harness.
c. Turn on 115-v power to furnace.
d. Set thermostat to "call for heat" and wait 1 minute. When
pressure switch is functioning properly, hot surface igniter
should NOT glow and control diagnostic light flashes a
SIZE OF TEST DIAL
SECONDS
FOR 1
5
1
2
REVOLUTION
Cu Ft
Cu Ft
Cu Ft
1800
50
72
144
1636
51
71
141
1500
52
69
138
1385
53
68
136
1286
54
67
133
1200
55
65
131
1125
56
64
129
1059
57
63
126
1000
58
62
124
947
59
61
122
900
60
60
120
857
62
58
116
818
64
56
112
783
66
54
109
750
68
53
106
720
70
51
103
692
72
50
100
667
74
48
97
643
76
47
95
621
78
46
92
600
80
45
90
581
82
44
88
563
84
43
86
545
86
42
84
529
88
41
82
514
90
40
80
500
92
39
78
486
94
38
76
474
96
38
75
462
98
37
74
450
100
36
72
439
102
35
71
429
104
35
69
419
106
34
68
409
108
33
67
400
110
33
65
391
112
32
64
383
116
31
62
375
120
30
60
367
status code 32. If hot surface igniter glows when inducer
motor is disconnected, shut down furnace immediately.
e. Determine reason pressure switch did not function properly
5
and correct condition.
Cu Ft
f. Turn off 115-v power to furnace.
360
355
g. Reconnect inducer motor wires, replace outer door, and
346
turn on 115-v power.
340
→
h. Blower will run for 90 sec before beginning the call for
333
heat again.
327
→
i. Furnace should ignite normally.
321
316
Step 5—Checklist
310
1. Put away tools and instruments. Clean up debris.
305
300
2. Check that blower OFF-DELAY time is selected as desired.
290
3. Verify that blower and burner access doors are properly
281
installed.
273
4. Cycle test furnace with room thermostat.
265
257
5. Check operation of accessories per manufacturer's instruc-
250
tions.
243
6. Review User's Guide with owner.
237
7. Attach literature packet to furnace.
231
225
SERVICE AND MAINTENANCE PROCEDURES
220
214
209
205
FIRE, INJURY, OR DEATH HAZARD
200
Failure to follow this warning could result in possible damage
196
to this equipment, serious personal injury, or death.
192
The ability to properly perform maintenance on this equip-
188
ment requires certain knowledge, mechanical skills, tools, and
184
equipment. If you do not possess these, do not attempt to
180
perform any maintenance on this equipment other than those
178
procedures recommended in the User's Manual.
173
170
167
164
→
161
ELECTRICAL SHOCK, FIRE, OR EXPLOSION
155
HAZARD
150
Failure to follow this warning could result in personal injury,
death, or property damage.
Before servicing, disconnect all electrical power to furnace.
Verify proper operation after servicing.
→
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 con-
trols. Wiring errors can cause improper and dangerous
operation.
Step 1—Introduction
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. 4,
you must revise your orientation to component location accord-
ingly.
35
Hide quick links:
Advertisement
Table of Contents
