Set Thermostat Heat Anticipator - Carrier DOWNFLOW HORIZONTAL 2-SPEED, 2-STAGE 58TMA Install And Operation Instructions

Table 11—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 1000
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
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.
b. When thermometer readings stabilize, subtract return-air
temperature from supply-air temperature to determine tem-
perature rise.
NOTE: If temperature rise is outside this range, first check:
(1.) Gas input for low- and high-heat operation.
(2.) Derate for altitude if applicable.
(3.) Return and supply ducts for excessive restrictions
causing static pressures greater than 0.50-in. wc.
c. Adjust air temperature rise by adjusting blower speed.
Increase blower speed to reduce temperature rise. Decrease
blower speed to increase temperature rise. For high heat,
speed selection can be med-high, med (5-speed blowers
only), or med-low (factory setting). For low heat, speed tap
selection can be low (factory setting), med-low, or med
(5-speed blowers only).
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
110 33 65
112 32 64
116 31 62
120 30 60
5
cu ft
360
355
346
INLET
340
PRESSURE
333 TAP
327
321
316
310
305
300
290
281
273
265
257
250
243
237
231
225
220
214
209
205
→ Fig. 19—Redundant Automatic Gas Control
200
196
192
BURNER FLAME
188
184
180
178
173
170
167
164
161
155
150
MANIFOLD
Disconnect electrical power before changing speed tap (or
removing motor lead cap if used on 5-speed motors). A
failure to follow this warning can cause personal injury or
death.
NOTE: For furnaces with 5-speed motors, ensure that unused
speed tap is either capped or, placed on SPARE terminal on control
board before power is restored.
d. To change motor speed selection for high heat, remove
blower motor lead from control HIGH-GAS-HEAT termi-
nal. (See Fig. 14 and Fig. 18.) Select desired blower motor
speed lead from 1 of the other terminals and relocate it to
HIGH-GAS-HEAT terminal. See Table 11 for lead color
identification. Reconnect original lead to SPARE terminal
(or use insulating cap, if used, applies only to furnaces with
5-speed blower motors). Follow this same procedure for
proper selection of cool and low-gas-heat speed selection.

6. Set thermostat heat anticipator.

a. When using a nonelectronic thermostat, the thermostat heat
anticipation must be set to match amp draw of electrical
21
ON/OFF
SWITCH
MANIFOLD
PRESSURE
TAP
Valve
Fig. 20—Burner Flame
LOW-FIRE
ADJUSTMENT
ALLEN SCREW
(UNDER CAP)
HIGH-FIRE
ADJUSTMENT
ALLEN SCREW
(UNDER CAP)
A97358
BURNER
A89020