Carrier 58EFB Installation, Start-Up, And Operating Instructions Manual page 16

Table 6—Gas Rate Cu Ft/Hr
SIZE OF TEST DIAL
SECONDS
FOR 1
1 2
REVOLUTION
cu ft cu ft cu 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 10 0
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
needed (see item 4). Refer to NFGC Appendix F,
Table F-4 for proper orifice sizing at high altitudes.
(2.) High-altitude installations (Canada only)—The Cana-
dian ratings are approved for altitudes up to 2000 ft for
natural and propane gases. High-altitude ratings are
from 2000 ft to 4500 ft above sea level. See Table 7
for nominal burner orifice size. High-altitude input
ratings include a 10 percent derate as required by
Canadian standards.
Table 7—Canadian Orifice Size
SEA LEVEL
GAS
0-2000 FT
Natural 42
Propane 54
h. Proceed to item 3 to adjust manifold pressure.
3. Adjust gas input.
NOTE: The gas valve has been nominally set at 3.5-in. wc for
natural gas.
a. Remove cap that conceals adjustment screw for gas valve
regulator. (See Fig. 15.)
b. Turn adjusting screw either counterclockwise (out) to
decrease input rate or clockwise (in) to increase rate. When
adjusting input rate, DO NOT set manifold pressure less
than 3.2-or more than 3.8-in. wc for natural gas. Make any
major adjustments by changing main burner orifices.
SIZE OF TEST DIAL
SECONDS
FOR 1
5 1 2
REVOLUTION
cu ft cu ft
50 72 144
51 71 141
52 69 138
53 68 136
54 67 133
55 65 131
56 64 129
57 63 126
58 62 124
59 61 122
60 60 120
62 58 116
64 56
112
66 54 109
68 53 106
70 51 103
72 50 100
74 48 97
76 47 95
78 46 92
80 45 90
82 44 88
84 43 86
86 42 84
88 41 82
90 40 80
92 39 78
94 38 76
96 38 75
98 37 74
100 36 72
102 35 71
104 35 69
106 34 68
108 33 67
33 65
110
32 64
112
31 62
116
30 60
120
HIGH ALTITUDE
2000-4500 FT
43
55
IGNITOR
CONNECTOR
5
cu ft
360
355
346
340
333 PILOT
ADJUSTMENT
327
(UNDER CAP
321
316
SCREW)
310
305
300
PILOT
290
OUTLET
281
273
265
MANIFOLD
PRESSURE
257
250 TAP
243
237
231
225
Fig. 15—Honeywell SmartValve
220
214
209
205
DO NOT redrill orifices. Improper drilling (burrs, out-of-
200
196
round holes, etc.) can cause excessive burner noise and
192
misdirection of burner flames. This can result in flame
188
184 impingement of the burners and heat exchangers causing
180 failures.
178
173
NOTE: If orifice hole appears damaged or it is suspected to have
170
been redrilled, check the orifice hole with the correct size
167
numbered drill bit. Never redrill an orifice. A burr-free and
164
161
squarely aligned orifice hole is essential for proper flame charac-
155
teristics.
150
c. Measure adjusted gas input rate using method outlined in
item 2.
d. Replace cap that conceals gas valve regulator adjustment
screw.
Be sure burner enclosure front is in place after adjustments
have been made.
e. Look through openings in burner enclosure and check
burner flame. The main burner flame should be clear blue,
almost transparent. (See Fig. 16.)
4. Change burner orifice (if necessary).
The furnace is supplied with standard orifices for the gas
shown on rating plate. If orifices need to be changed to
achieve proper input rate, proceed as follows:
a. Remove manifold pipe cover and burner removal cover/air
inlet plate.
b. Remove manifold retention plate.
c. Pull manifold/burner assembly out past support pins and
remove assembly.
NOTE: It is only necessary to remove 1 manifold retention plate
to gain access to burners.
d. Remove burners from assembly and change orifices as
required.
e. Reinstall assembly by reversing the procedure in items a
through d making sure that assembly is securely mounted
under manifold retention plate on opposite side of unit.
16
IGNITION SYSTEM
CONTROL KNOB
IGNITION
MODULE
INLET
PRESSURE
TAP
GAS
PRESSURE
REGULATOR
ADJUSTMENT
(UNDER CAP
SCREW)
A96079