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Table 1 — Thermistor Resistance vs Temperature Values for Space Temperature Sensor, Return-Air
Temperature Sensor, and Supply-Air Temperature Sensor
TEMP
(C)
TEMP
(F)
RESISTANCE
(Ohms)
–40 –40 335,651
–35 –31 242,195
–30 –22 176,683
–25 –13 130,243
–20 –4 96,974
–15 5 72,895
–10 14 55,298
–5 23 42,315
0 32 32,651
5 41 25,395
10 50 19,903
15 59 15,714
20 68 12,494
25 77 10,000
30 86 8,056
35 95 6,530
40 104 5,325
45 113 4,367
50 122 3,601
55 131 2,985
60 140 2,487
65 149 2,082
70 158 1,752
2
3
45
61
SW1
SEN
BLK (GND)
RED (SPT)
RED(+)
WHT(GND)
BLK(-)
CCN COM
SENSOR WIRING
2
3
45
61
SW1
SEN
SET
Cool Warm
WHT
(T56)
BLK (GND)
RED (SPT)
RED(+)
WHT(GND)
BLK(-)
CCN COM
SENSOR WIRING
JUMPER
TERMINALS
AS SHOWN
Fig. 12 — Space Temperature Sensor Wiring
(33ZCT55SPT)
Fig. 13 — Space Temperature Sensor Wiring
(33ZCT56SPT)