Table of Contents
Advertisement
Primary Gas Valve – The gas valve controls the
flow of gas to all of the burners. When the gas
valve is energized it automatically opens and
regulates the gas pressure in the manifold.
Secondary Gas Valve – The gas valve controls
the flow of gas to the high fire burners only.
Pressure Switch – The pressure switch veri-
fies that the inducer is drawing the combustion
gases through the heat exchanger.
senses a blocked condensate drain condition.
Vent Pressure Switch – The vent pressure
switch reacts to blockage in the vent or combus-
tion air piping.
Supply Air Limit Switch – The supply air limit
switch prevents the air temperature leaving the
furnace from exceeding the maximum outlet air
temperature.
Vent Safety Switch – The vent safety switch
shuts the furnace down if the outlet flue gas
temperature increases above 160°F. This switch
protects the plastic flue system and the inducer
from over-temperature conditions.
Flame Roll-Out Switch – This switch provides
flame roll-out protection to the furnace and
combustion air inlet pipe.
CUBIC FEET PER REVOLUTION OF
TIME FOR
ONE REVOLUTION
(SECONDS)
1
24
150
26
138
28
129
30
120
32
113
34
106
36
100
38
95
40
90
42
86
44
82
46
78
48
75
50
72
52
69
54
67
56
64
58
62
60
60
62
58
64
56
66
55
68
53
70
51
72
50
38
MAINTENANCE
It is recommended that the furnace be checked
yearly. At a minimum, this check should include
the following items.
To avoid electric shock, personal injury,
It also
or death, disconnect the electric power
before performing any maintenance.
Holes in the vent pipe or heat exchanger
can cause products of combustion to
enter the home. Replace the vent pipe
or heat exchanger if leaks are found.
Failure to prevent products of com-
bustion from being circulated into the
living space can create potentially haz-
ardous conditions including carbon
monoxide poisoning that could result
in personal injury or death.
GAS FLOW RATE (CUBIC FEET PER HOUR)
METER
ONE REVOLUTION
5
10
750
1500
692
1385
643
1286
600
1200
563
1125
529
1059
500
1000
474
947
450
900
429
857
409
818
391
783
375
750
360
720
346
692
333
667
321
643
310
621
300
600
290
581
281
563
273
545
265
529
257
514
250
500
Table 12. Gas Flow Rate
WARNING:
!
!
WARNING:
TIME FOR
CUBIC FEET PER REVOLUTION OF
(SECONDS)
1
74
49
76
47
78
46
80
45
82
44
84
43
86
42
88
41
90
40
92
39
94
38
96
38
98
37
100
36
102
35
104
35
106
34
108
33
110
33
112
32
114
32
116
31
118
31
120
30
METER
5
10
243
486
237
474
231
462
225
450
220
439
214
429
209
419
205
409
200
400
196
391
191
383
188
375
184
367
180
360
176
353
173
346
170
340
167
333
164
327
161
321
158
316
155
310
153
305
150
300
Advertisement
Table of Contents
