Carrier 59TP6C Installation, Start-Up, Operating And Service And Maintenance Instructions page 61

59TP6C: Installation, Start-up, Operating and Service and Maintenance Instructions
a. Turn gas valve ON/OFF switch to OFF.
b. Loosen set screw on manifold tower pressure tap no more than
one full turn with a 3/32-in. hex wrench, or remove the 1/8 inch
NPT plug from the manifold pressure tap on the gas valve.
c. Connect a water column manometer or similar device to
manifold pressure tap.
d. Turn gas valve ON/OFF switch to ON.
e. On the 3 digit display, navigate to (Htt) and select (2St) to lock
furnace in low-heat operation. See
f. Manually close blower door switch.
g. Jumper R and W/W1 thermostat connections on control to start
furnace. See Fig. 38.
h. Remove regulator adjustment cap from low heat gas valve
pressure regulator and turn low-heat adjusting screw (3/16 or
smaller flat-tipped screwdriver) counterclockwise (out) to
decrease input rate or clockwise (in) to increase input rate. See
Fig. 64.
!
DO NOT set low-heat manifold pressure less than 1.3-in. w.c. (324 Pa)
or more than 1.7 in. w.c. (423 Pa) for natural gas. If required manifold
pressure is outside this range, change main burner orifices to obtain
manifold pressure in this range.
i. Install low-heat regulator adjustment cap.
j. Leave manometer or similar device connected and proceed to
Step 2.
2. Adjust manifold pressure to obtain high fire input rate See
a. Jumper R to W/W1 and W2 thermostat connections on furnace
control. This keeps furnace locked in high-heat operation.
b. Remove regulator adjustment cap from high-heat gas valve
pressure regulator and turn high heat adjusting screw (3/16-in. or
smaller flat-tipped screwdriver) counterclockwise (out) to
decrease input rate or clockwise (in) to increase input rate. See
Fig. 64.
!
DO NOT set high-heat manifold pressure less than 3.2-in. w.c. (797 Pa)
or more than 3.8 in. w.c. (947 Pa) for natural gas. If required manifold
pressure is outside this range, change main burner orifices to obtain
manifold pressure in this range.
c. When correct input is obtained, replace caps that conceal gas
valve regulator adjustment screws. Main burner flame should be
clear blue, almost transparent See
Fig. 65 – Burner Flame
d. Remove jumpers R to W/W1 and R to W2.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 38.
NOTICE
NOTICE
Fig. 65.
Clocking the Meter
3. Verify natural gas input rate by clocking meter.
NOTE: Contact your HVAC distributor or gas supplier for metric gas
meter tables, if required.
a. Turn off all other gas appliances and pilots served by the meter.
b. On the 3 digit display, navigate to (Htt) and select (2St). This
keeps furnace locked in low-heat operation when only W/W1 is
energized.
c. Jumper R to W/W1.
d. Run furnace for 3 minutes in low-heat operation.
e. Measure time (in sec) for gas meter to complete one revolution
and note reading. The 2 or 5 cubic feet dial provides a more
accurate measurement of gas flow.
f. Refer to Table 25
SIZE OF TEST DIAL
SEC.
FOR 1
1 Cu
REV.
Ft.
10 360
11 327
12 300
13 277
14 257
15 240
16 225
17 212
18 200
Fig. 64.
19 189
20 180
21 171
22 164
23 157
24 150
25 144
26 138
27 133
28 129
29 124
30 120
31 116
32 113
33 109
34 106
35 103
36 100
37 97
38 95
39 92
40 90
41 88
42 86
43 84
44 82
45 80
46 78
47 76
48 75
49 73
A89020
g. Multiply gas rate cu ft./hr by heating value (BTUh/cu ft.) to
obtain input rate.
h. If clocked rate does not match required input from Step 1,
increase manifold pressure to increase input or decrease manifold
61
for cubic ft. of gas per hr.
Table 25 – Gas Rate (CU ft./hr)
SEC.
FOR 1
2 Cu 5
REV.
Ft. Cu Ft.
720 1800 50
655 1636 51
600 1500 52
555 1385 53
514 1286 54
480 1200 55
450 1125 56
424 1059 57
400 1000 58
379 947 59
360 900 60
343 857 62
327 818 64
313 783 66
300 750 68
288 720 70
277 692 72
267 667 74
257 643 76
248 621 78
240 600 80
232 581 82
225 563 84
218 545 86
212 529 88
206 514 90
200 500 92
195 486 94
189 474 96
185 462 98
180 450 100
176 439 102
172 429 104
167 419 106
164 409 108
160 400 110
157 391 112
153 383 116
150 375 120
147 367
SIZE OF TEST DIAL
1 Cu 2 Cu 5 Cu
Ft. Ft. Ft.
72 144 360
71 141 355
69 138 346
68 136 340
67 133 333
65 131 327
64 129 321
63 126 316
62 124 310
61 122 305
60 120 300
58 116 290
56 112 281
54 109 273
53 106 265
51 103 257
50 100 250
48 97 243
47 95 237
46 92 231
45 90 225
44 88 220
43 86 214
42 84 209
41 82 205
40 80 200
39 78 196
38 76 192
38 75 188
37 74 184
36 72 180
35 71 178
35 69 173
34 68 170
33 67 167
33 65 164
32 64 161
31 62 155
30 60 150