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Unit Description, Features & Options
25
Compressor Digital Control Valve
The MP-4000 controller pulses the Compressor Digital Control solenoid valve between open and closed
positions. This provides precise cooling capacity control. No pump down function or warm gas bypass
control is used in conjunction with the Compressor Digital Control valve. See the “General Theory of
Operation Chapter” for more detailed information.
Figure 6: Compressor Digital Control Solenoid Valve
Economizer Heat Exchange System
An economizer heat exchange system replaces the conventional heat exchanger. The economizer Heat
Exchange system subcools the liquid refrigerant before it reaches the evaporator expansion valve.
Subcooling liquid refrigerant increases the cooling efficiency and capacity of the evaporator. See the
“General Theory of Operation Chapter” for more detailed information.
Figure 7: Economizer Heat Exchanger
Temperature Sensors
Each sensor element is connected to a cable and packaged in a sealed stainless steel tube. The temperature
signal from the sensor is transmitted through the cable. PT.1000 type temperature sensors are used to
sense temperatures for the:
•
Supply Air
•
Return Air
•
Evaporator Coil
•
Condenser Coil
•
Ambient Air
The compressor sensor is of Thermistor type and is located in the top cap of the compressor.
These sensors are field replaceable. Five sensor receptacles are provided; three USDA and one cargo
temperature.
AXA0428
AXA0427
Summary of Contents for 098203
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Page 3: ...MAGNUM TK 60275 4 MM Rev 3 08 15 Copyright 2012 Ingersoll Rand EMEIA Printed in Ireland...
Page 193: ...Refrigeration Maintenance 191 Figure 163 Filter Drier...
Page 200: ...Refrigeration Maintenance 198 Figure 169 Receiver Tank Figure 170 Water Cooled Condenser Tank...
Page 257: ...255 Schematic Diagram RELEASED 19 Sep 2013...
Page 258: ...256 Wiring Diagram Page 1 of 2 RELEASED 19 Sep 2013...
Page 259: ...257 Wiring Diagram Page 2 of 2 RELEASED 19 Sep 2013...
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