Carrier 58PAV - Manual (Page 12)

Table 7—Gas Rate (Cu Ft/Hr)
SECONDS SIZE OF TEST DIAL SECONDS SIZE OF TEST DIAL
FOR 1 1 2 5 FOR 1 ' 1 2 5
REVOLUTION cu ft CU ft cu ft REVOLUTION cu ft cu ft cu ft
10 360 720 1800 50 72 144 360
11 327 655 1636 51 71 141 355
12 300 600 1500 52 69 138 346
13 277 555 1385 53 68 136 340
14 257 514 1286 54 67 133 333
15 240 480 1200 55 65 131 327
16 225 450 1125 56 64 129 321
17 212 424 1059 57 63 126 316
18 200 400 100 58 62 124 310
19 189 379 947 59 61 122 305
20 180 360 900 60 60 120 300
21 171 343 857 62 58 116 290
22 164 327 818 64 56 112 281
23 157 313 783 66 54 109 273
24 150 300 750 68 53 106 265
25 144 288 720 70 51 103 257
26 138 277 692 72 50 100 250
27 133 267 667 74 48 97 243
28 129 257 643 76 47 95 237
29 124 248 621 78 46 92 231
30 120 240 600 80 45 90 225
31 116 232 581 82 44 88 220
32 113 225 563 84 43 86 214
33 109 218 545 86 42 84 209
34 106 212 529 88 41 82 205
35 103 206 514 90 40 80 200
36 100 200 500 92 39 78 196
37 97 195 486 94 38 76 192
38 95 189 474 96 38 75 188
39 92 185 462 98 37 74 184
40 90 180 450 100 36 72 180
41 88 176 439 102 35 71 178
42 86 172 429 104 35 69 173
43 84 167 419 106 34 68 170
44 82 164 409 108 33 67 167
45 80 160 400
110 33 65
164
46 78 157 391 161
47 76 153 383 155
48 75 150 375
120 30 60
150
49 73 147 367
d. High altitude —In the United States, gas input on rating
plate is for altitudes up to 2000 ft. Ratings for altitudes over
2000 ft must be 4 percent less for each 1000 ft above sea
level. To obtain the adjusted altitude rating, adjust the
manifold pressure, item c., and replace the main burner
orifices as needed. Refer to National Fuel Gas Code
Appendix F, Table F-4 for proper orifice sizing at high
altitudes.
e. Canadian installations only—The Canadian ratings are
approved for altitudes up to 2000 ft for natursil and propane
gases. High-altitude ratings are from 2000 ft to 4500 ft
above sea level. See Table 8 for nominal burner orifice
size. High-altitude rating includes a 10 percent derate as
required by Canadian standards.
A90044
Fig. 11—Redundant Automatic Gas Control Valve
BURNER FLAME
b. When thermometer readings stabilize, subtract return-air
temperature from supply-air temperature to determine tem­
perature rise.
c. Adjust air temperature rise by adjusting blower speed.
Increase blower speed to reduce temperature rise. Decrease
blower speed to increase temperature rise.
Table 8—Canadian Orifice Size
GAS
SEA LEVEL
0—2000 FT
HIGH ALTITUDE
2001—4500 FT
Natural 43 44
Propane 54 55
2. Set temperature rise.
Do not exceed the temperature rise range specified on the unit
rating plate. Determine the air temperature rise as follows:
a. Place duct thermometers in return and supply ducts as near
furnace as possible. Be sure thermometers do not "see" heat
exchangers so that radiant heat will not affect thermometer
readings. This is particularly important with straight-run
ducts.
A WARNING
Disconnect the electrical power before changing the speed
tap. A failure to follow this warning can cause personal
injury.
d. To change motor speed taps, remove the motor tap lead and
relocate it on the desired terminal on the plug-in terminal
block/speed selector located on the blower housing. (See
Table 9.)
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