1-13. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS. (Continued)
Table 1-4. Description of, Major Components, Evaporator Assembly (Continued).
Item
Item Name
Description and Purpose
No.
3
Thermoexpansion Valve (TEV)
Meters refrigerant flow and converts hot high-
pressure liquid to a cold low-pressure liquid.
Controlled by refrigerant temperature and
pressure in the evaporator and TEV sensing bulb.
TEV opening is governed by evaporator
temperature. As the evaporator warms, the TEV
opens allowing a rapid flow of liquid in the
evaporator, speeding up cooling. As the
evaporator cools, the TEV closes restricting
refrigerant flow in the evaporator, slowing down
cooling.
4
Differential Pressure Switch
Monitors the cleanliness of the air filter and
illuminates an indicator light on the control
module when filter is dirty.
5
Evaporator Coil
Absorbs heat through the vaporization of low-
pressure liquid. A low-pressure vapor is
discharged from the coil.
6
Low-Pressure Cut Out Switch
Shuts off compressor and illuminates a control
module indicator light when the pressure drops
to 27 3 psi (186 21 kPa).
7
EMI Filter and EMI Gasket
Dissipates and prevents EMI from affecting the
operation of other electronic equipment located
within close proximity.
8
Handle
Allows two people to lift evaporator assembly.
9
Terminal Board, Single Row
Allows for ease of troubleshooting and repair.
10
Condensate Drain Pan
Collects condensation from coil and discharges
through drain hole.
11
Evaporator Fan Motor
Drives Evaporator Housing Fan.
12
Evaporator Fan Housing
Draws air across evaporator coil to increase
heat transfer from refrigerant.
1-14. EQUIPMENT DATA.
OPERATING TEMPERATURES
-25 (-32 )
Low
F
C
+120 (+49 )
High
F
C
PERFORMANCE
Cooling capacity
30,000 BTUH
POWER REQUIRED
Voltage
28vdc
Amperes
66
Watts, Running (Maximum)
1,848
DIMENSIONS
CONDENSER ASSEMBLY
Width
33.00 in.
(83.82 cm)
Depth
20.00 in.
(50.80 cm)
Height
22.25 in.
(56.52 cm)
Weight (Maximum) 200 lb (91 kg)
Change 1
1-8
