Trane 4WCC4024E1000A Installation And Operation Manual page 23

Table 12. Defrost Control Thermistor Table
TEMP °F TEMP °C
-15.00 -26.11
-10.00 -23.33
-5.00 -20.56
0.00 -17.78
5.00 -15.00
10.00 -12.22
15.00 -9.44
20.00 -6.67
25.00 -3.89
30.00 -1.11
35.00 1.67
40.00 4.44
45.00 7.22
50.00 10.00
55.00 12.78
60.00 15.56
65.00 18.33
70.00 21.11
Table 13. Demand Defrost Quick Specifications
COMPRESSOR
MNEMONIC NO
CNT
GROUP NOMENCLATURE
(a)
SUPERSEDURE
CNT
OD FAN TYPE – PSC/ECM
DEFROST ENABLED: Y = ON
COIL TEMPERATURE =
DEFROST PERMIT: Y = ON
COIL TEMPERATURE =
MIN DEFROST TIME (MINUTES)
TARGET DEFROST TIME (MINUTES)
MAX TIME OVERRIDE (MINUTES)
DEFROST TERMINATE COIL TEMPERATURE (Factory Setting)
DEFROST HI TERMINATE COIL TEMPERATURE (Cut Jumper 2)
SOV SWITCH-OVER DELAY
AFTER DEFROST TERM. (SECONDS)
DEFEAT SWITCH-OVER DELAY (SECONDS) (Cut Jumper 2)
LOW AMBIENT HEAT PUMP LOCK OUT
LOW AMBIENT HEAT PUMP RESUME
LPCO INPUT TO CONTROL
LPCO BYPASS IN/OUT DEFROST (MINUTES)
GROUP suffix for drawing number D159982
(a)
≤ (EQUAL OR LESS THAN)
(b)
18-BB41D1-1A-EN
THERMISTOR
RESISTANCE Vo (Volts)
(OHMS)
135976 2.50
115112 2.40
97745 2.29
83247 2.17
71108 2.05
60916 1.93
52333 1.81
45076 1.69
38927 1.56
33703 1.45
29253 1.33
25452 1.22
22198 1.12
19405 1.02
17002 0.93
14930 0.85
13138 0.77
11586 0.70
Table 12. Defrost Control Thermistor Table
(continued)
75.00 23.89
80.00 26.67
85.00 29.44
90.00 32.22
95.00 35.00
100.00 37.78
105.00 40.56
110.00 43.33
115.00 46.11
120.00 48.89
125.00 51.67
130.00 54.44
135.00 57.22
Example:
Sensor temp. = 19°F
Measured Resistance = 46K ohms
This sensor is good since the measured value is
relatively close to the chart value.
SCROLL
07824
G01 / G04 / G06
NA
PSC
1-SPD
≤52° F
(b)
≤32° F
1
4
15
47° F
70° F
12
0
-7° F
3° F
YES
3
U U n n i i t t S S t t a a r r t t u u p p
10238 0.63
9065 0.57
8043 0.52
7150 0.47
6368 0.42
5682 0.38
5079 0.35
4548 0.31
4079 0.28
3665 0.26
3298 0.23
2972 0.21
2683 0.19
SCROLL
07825
G02 / G07
NA
ECM
1-SPD
≤52° F
≤32° F
1
4
15
47° F
70° F
12
0
-7° F
3° F
YES
3
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