T-334
2--9
Table 2.3 - Continued
g. Fuses
Control Circuit
7.5 amps (F3A,F3B)
Controller/DataCORDER
5 amps (F1 & F2)
Emergency Bypass
10 amps (FEB)
Emergency Defrost
5 amps (FED)
h. Vent Positioning
Sensor
Electrical Output
0.5 VDC to 4.5 VDC over 90 degree range
Supply Voltage
5 VDC +/- 10%
Supply Current
5 mA (typical)
i. Solenoid
Valve
Coils
ESV, LIV, XBSV
USV
Nominal Resistance @
77F (25C)
7.7 ohms +/- 5%
2.7 ohms +/- 5%
Maximum Current Draw
0.7 amps
1.6 amps
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 verses relative humidity (RH) percentage:
30%
0.99 V
50%
1.65 V
70%
2.31 V
90%
2.97 V
2.4 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.
Open safety switch contacts on either or both of devices
IP-CP or HPS will shut down the compressor.
Open safety switch contacts on device IP-CM will shut
down the condenser fan motor.
The entire refrigeration unit will shut down if one of the
following safety devices open: (a) Circuit Breaker(s); (b)
Fuse (F3A/F3B, 7.5A); or (c) Evaporator Fan Motor
Internal Protector(s) - (IP-EM) (for Normal Evaporator
Fan operation ONLY).
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