Zamil MAC-240 - Air Conditioning and Refrigeration Systems; Air Conditioning Section (ACU)

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2.4 AIR CONDITIONING SECTION (ACU)
The factory assembled Air Conditioning unit has cooling or combination of heating (optional) and cooling as a single
package, suitable for mobile applications. The cooling system consists of two stage refrigeration compressors, with each
stage having a closed loop circuit in which the refrigerant is circulated by the pressure differential created by the com-
pressors. The compressor maintains high side condensing pressure and a thermostatic expansion valve separates the
high pressure side from the low pressure side (evaporator). The dual circuit Hermetic scroll compressors run continu-
ously in the ambient temperature of 50
0
C (122
0
F) at 100% relative humidity environment. Auto refrigeration system
ensures defrost cycle to prevent the system icing.
The unit consists of the following protective devices.
1. High Refrigerant Discharge Pressure Switch
2. Low Suction Pressure Switch
3. Compressor Motor Winding Thermal Overload Protection.
4. Compressor External Overload/ Short Circuit Protection.
5. Blower Motor Overload/ Short Circuit Protection.
6. Condenser Fan Motor Thermal/ Short Circuit Protection
EQUIPMENT EXPLODED VIEW
13
13 EXHAUST FAN
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07
03
02 SUPPLY AIR OUTLET
04 BLOWER
C5 EVAPORATOR COIL
06 FRESH AIR FILTER
07 FRESH AIR INTAKE PANEL
08 COMPRESSOR
09 CONDENSOR COIL
01 GENERATOR
10 CONDENSOR FAN
11 CONTROL BOX
03 MOTOR
12 EXHAUST MUFFLER - G/SET
02
04
01
12
10
09
08
06
05