35
Table 11. Gas Flow Rate
TIME FOR
TIME FOR
ONE REVOLUTION
ONE REVOLUTION
(SECONDS)
1
5
10
(SECONDS)
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
180
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
GAS FLOW RATE (CUBIC FEET PER HOUR)
CUBIC FEET PER REVOLUTION OF
METER
CUBIC FEET PER REVOLUTION OF
METER
must be replaced, use only factory authorized
replacement parts. See the Replacement Parts
List for the factory authorized replacement for
each component.
Flame Sensor
The flame sensor acts to prove that flame has
carried over from the igniter to the opposite end
burner. If no flame is sensed, the furnace will
shut down within 7 seconds of ignition.
Flame Roll-Out Switch
The flame roll-out switch verifies that the burner
flames are drawn into the heat exchanger
tubes. If the burner flames are not properly
drawn into the heat exchanger, the flame roll-
out switch will open. The circulating air blower
(and combustion blower, if connected) will
continue to operate if the flame roll-out switch
opens.
Gas Valve
The gas valve controls the flow of gas to the
burners. When the gas valve is energized it
automatically opens and regulates the gas
pressure in the manifold.
Pressure Switch
The pressure switch verifies that the inducer is
drawing the combustion gases through the heat
exchanger.
Supply Air Limit Switch
The supply air limit switch prevents the air
temperature leaving the furnace from exceeding
the maximum allowable outlet air temperature.
Vent Safety Switch
The vent safety switch shuts the furnace down
if the vent becomes blocked or restricted.
MAINTENANCE
It is recommended that the furnace be checked
yearly. At a minimum, this check should include
the following items.
! WARNING:
To avoid electrical shock, personal in-
jury, or death, turn off the electric power
at the disconnect or the main service
panel before making any electrical con-
nections.
Summary of Contents for TA-060C-08A
Page 2: ...2...
