Bryant GAS-FIRED INDUCED-COMBUSTION FURNACES 383KAV, Инструкция по установке, запуску и эксплуатации

Страница: 16 / 20

CAUTION: Recheck temperature rise. It must be within
air temperature rise range specified on furnace rating
plate. Recommended operation is at midpoint of rise or
above.
3. Set thermostat heat anticipator.
The thermostat heat anticipator must be set to match the
amp draw of the electrical components in the R-W circuit.
Accurate amp draw readings can be obtained at thermostat
subbase terminals R and W. Fig. 14 illustrates an easy
method of obtaining the actual amp draw. The amp reading
should be taken after the blower motor has started. See the
thermostat manufacturer’s instructions for adjusting the
heat anticipator and for varying the heating cycle length.
NOTE:
When using an electronic thermostat, set the cycle rate for
3 cycles per hr.
E. Check Safety Controls
The flame sensor, gas valve, and pressure switch were all checked
in the Start-up Procedures section as part of normal operation.
1. Check primary limit control.
This control shuts off the combustion control system and
energizes the circulating-air blower motor if the furnace
overheats.
TABLE 6—MODEL 383KAV ORIFICE SIZE* AND MANIFOLD PRESSURE FOR CORRECT INPUT (Continued)
(Tabulated Data Based on 22,000 Btuh per Burner, Derated 4 Percent per 1000 Ft Above Sea Level)
ALTITUDE
RANGE
(FT)
AVG GAS
HEAT VALUE
AT ALTITUDE
(BTU/CU FT)
SPECIFIC GRAVITY OF NATURAL GAS
0.58 0.60 0.62 0.64 0.66
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
Orifice
No.
Manifold
Pressure
U.S.A.
Only
575 43 2.7 43 2.8 43 2.9 43 3.0 43 3.1
600 43 2.5 43 2.6 43 2.7 43 2.7 43 2.8
9001 625 43 2.3 43 2.4 43 2.4 43 2.5 43 2.6
650 43 2.1 43 2.2 43 2.3 43 2.3 43 2.4
to 675 48 3.7 43 2.0 43 2.1 43 2.2 43 2.2
700 48 3.4 48 3.6 48 3.7 43 2.0 43 2.1
10,000 725 49 3.8 48 3.3 48 3.4 48 3.5 48 3.6
750 49 3.5 49 3.6 49 3.8 48 3.3 48 3.4
775 49 3.3 49 3.4 49 3.5 49 3.6 49 3.7
* Orifice sizes shown in BOLD are factory installed.
CAUTION:
DO NOT redrill orifices. Improper drilling
(burrs, out-of-round holes, etc.) can cause excessive
burner noise and misdirection of burner flames. This can
result in flame impingement of burners and heat exchang-
ers, causing failures.
A93059
BURNER
ORIFICE
TABLE 7—ALTITUDE DERATE MULTIPLIER FOR U.S.A.
ALTITUDE
(FT)
PERCENT
OF DERATE
DERATE MULTIPLIER
FACTOR FOR U.S.A*
0—2000 0 1.00
2001—3000 8—12 0.90
3001—4000 12—16 0.86
4001—5000 16—20 0.82
5001—6000 20—24 0.78
6001—7000 24—28 0.74
7001—8000 28—32 0.70
8001—9000 32—36 0.66
9001—10,000 36—40 0.62
* Derate multiplier factor is based on midpoint altitude for altitude range.
TABLE 8—GAS RATE (CU FT/HR)
SECONDS
FOR 1
REVOLUTION
SIZE OF
TEST DIAL
SECONDS
FOR 1
REVOLUTION
SIZE OF
TEST DIAL
1
cu ft
2
cu ft
5
cu ft
1
cu ft
2
cu ft
5
cu ft
10
11
12
13
14 360
327
300
277
257 720
655
600
555
514 1800
1636
1500
1385
1286 50
51
52
53
54 72
71
69
68
67 144
141
138
136
133 360
355
346
340
333
15
16
17
18
19 240
225
212
200
189 480
450
424
400
379 1200
1125
1059
100
947
55
56
57
58
59 65
64
63
62
61 131
129
126
124
122 327
321
316
310
305
20
21
22
23
24 180
171
164
157
150 360
343
327
313
300 900
857
818
783
750 60
62
64
66
68 60
58
56
54
53 120
116
112
109
106 300
290
281
273
265
25
26
27
28
29 144
138
133
129
124 288
277
267
257
248 720
692
667
643
621 70
72
74
76
78 51
50
48
47
46 103
100
97
95
92
257
250
243
237
231
30
31
32
33
34 120
116
113
109
106 240
232
225
218
212 600
581
563
545
529 80
82
84
86
88 45
44
43
42
41 90
88
86
84
82 225
220
214
209
205
35
36
37
38
39 103
100
97
95
92
206
200
195
189
185 514
500
486
474
462 90
92
94
96
98 40
39
38
38
37 80
78
76
75
74 200
196
192
188
184
40
41
42
43
44 90
88
86
84
82 180
176
172
167
164 450
439
429
419
409 100
102
104
106
108 36
35
35
34
33 72
71
69
68
67 180
178
173
170
167
45
46
47
48
49 80
78
76
75
73 160
157
153
150
147 400
391
383
375
367
110
112
116
120 33
32
31
30 65
64
62
60 164
161
155
150
—16—