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2–17
T-319
2.6
SAFETY AND PROTECTIVE DEVICES
Unit components are protected from damage by safety and protective devices listed in the following table. These
devices monitor the unit operating conditions and open a set of electrical contacts when an unsafe condition
occurs.
f. Remote Evaporator
Fan Motor
Full Load Amps
1 amp
g. Evaporator Coil
Heaters
Number of Heaters
6
Rating
750 watts +5/-10% each @ 230VAC
Resistance (cold)
66.8 to 77.2ohms @ 20°C (68°F)
Type
Sheath
h. Fuses
Control Circuit
7.5 amps (F3A, F3B)
Controller/DataCORDER
5 amps (F1 & F2)
Emergency Defrost
5 amps (FED)
Drain Line Heater
5 amps (FDH)
Humidity Power
Transformer
5 amps (FH)
i. Compressor Crankcase Heater
180 watts @ 460 VAC
j. Humidity Sensor
Orange wire
Power
Red wire
Output
Brown wire
Ground
Input voltage
5 vdc
Output voltage
0 to 3.3 vdc
Output voltage readings vs relative humidity (RH) percentage:
30%
0.99 V
50%
1.65 V
70%
2.31 V
90%
2.97 V
k. Controller
Setpoint Range
-30 to +30°C (-22 to +86°F)
Table 2–1 Safety and Protective Devices
UNSAFE CONDITION
SAFETY DEVICE
DEVICE SETTING
Excessive current draw
Fuse, Defrost Line Heater (FDLH)
5 amps
Summary of Contents for 69NT40-541-304
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Page 61: ...7 3 T 319 Figure 7 2 Schematic 69NT40 541 304...
Page 62: ...T 319 7 4 Figure 7 3 Unit Wiring Diagram Sheet 1 69NT40 541 304...
Page 63: ...7 5 T 319 Figure 7 4 Unit Wiring Diagram Sheet 2 69NT40 541 304...
Page 64: ...T 319 7 6 Figure 7 5 Legend 69NT40 541 345...
Page 65: ...7 7 T 319 Figure 7 6 Schematic 69NT40 541 345...
Page 66: ...T 319 7 8 Figure 7 7 Unit Wiring Diagram Sheet 1 69NT40 541 345...
Page 67: ...7 9 T 319 Figure 7 8 Unit Wiring Diagram Sheet 2 69NT40 541 345...
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Page 78: ...T 319 13 1 13 RECEIVER 8 5 17 18 19 20 4 Item 1 4 2 3 6 7 8 6 7 10 9 11 12 13 14 15 16 2...
Page 81: ...14 2 T 319...
Page 84: ...T 319 17 1 17 REMOTE EVAPORATOR FRAME A A A A 4 2 5 6 3 8 9 1 15 11 7 12 10 14 13 2 2 2 9 3 9...
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