Carrier 58 Series - Manual (Page 6)

nace. However, when lighting the pilot for the first
time, perform the following additional steps;
■ 1. If supply line was not purged before connecting
furnace, it will be full of air. It is recommended
that the ground joint union be cracked, and sup­
ply line be allowed to purge until odor of gas is
detected. Never purge gas lines into combustion
chamber. Immediately upon detection of gas
odor, retighten the union. Allow 5 minutes to
elapse, then light pilot in accordance with in­
structions on furnace.
2. Pilot flame should be soft blue in color.
a. For natural gas controls, flame should be long
enough to provide good impingement on ele­
ment of pilot. Flame should extend above the
carryover ports of the burner.
b. For complete shutoff gas controls, flame
should surround tip of thermocouple element
of pilot and extend downward to include 3/8
to 1 / 2-in. of thermocouple. Flame must never
come in contact with any other part of ther­
mocouple or its lead wire. Flame lies under
carryover port of burner and merges with
carryover flame.
3. Pilot adjusting screw is located on main gas valve
or pilot shutoff valve.
a. Remove capscrew; turn pilot gas full on and
turn adjusting screw until desired appearance
is obtained.
b. Replace capscrew.
4. For natural gas controls, check the pilot oper­
ation as follows: Attach a low-voltage test light
to electrical leads of gas valve. With thermostat
set above room temperature, shut off gas supply
to burners and pilot with main manual shutoff
valve. If test light goes out within 45 seconds,
pilot is functioning properly. If light does not go
out within 60 seconds, replace pilot.
5. The 100% safety control can be easily checked
by unscrewing pilot thermocouple lead from gas
valve. Pilot and main burner gas should shut off
— no gas should flow thru valve. After valve is
checked and found to operate satisfactorily,
reconnect thermocouple to gas valve to finger-
tight position. Then tighten 1/4 turn with a
wrench. Relight pilot, following lighting instruc­
tions on furnace.
Burners — Light main burners using procedure
contained on Lighting Instruction Plate attached to
furnace.
Gas Input — Determine the gas input as follows:
NATURAL GAS
1. Turn off all other gas appliances and pilots.
2. Measure time (in seconds) for gas meter test dial
to complete one revolution.
3. Refer to Table 2 for cu ft of gas per hour.
Table 2 — Gas Rate (Cubic Feet Per Hour)
SIZE OF SIZE OF
SECONDS TEST DIAL
SECONDS
TEST DIAL
FOR ONE FOR ONE »»"— --- ---- ,
REVOLUTION
1 2 5
REVOLUTION
1 2 5
cu ft cu ft cu ft 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 1000 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 78 157 391 112 32 64 161
47 76 153 383 116 31 62 155
48 75 150 375 120 30 60 150
49 73 147 367 J
4.
^ 5.
Multiply cu ft per hour times heating value of
gas (Btu/ cu ft). Obtain heating value of gas from
local gas utility.
Example:
Btu/cu ft
X
cu ft = Btuh heating input
Time for one revolution of 2 cu ft dial
= 72 seconds
Heat value of gas = 1070 Btuh/cu ft
100
X
1070 = 107,000 Btuh input
Measured gas input should not exceed gas
input shown on unit rating plate.
6. To adjust input rate, remove cap that conceals
regulator adjustment. Turn adjusting screw
counterclockwise (out) to decrease input. When
adjusting, DO NOT change manifold pressure
more than 0.3 in. wg. Any major adjustment
should be made by changing main burner
orifices.
LP (PROPANE) GAS — These units are equipped
with pressure regulators. Burner orifices are sized to