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Unit Description, Features & Options
31
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. Thermistor type temperature
sensors are used to sense temperatures for the:
•
Supply Air, Left Hand
•
Supply Air, Right Hand
•
Return Air
•
Evaporator Coil
•
Condenser Coil
•
Compressor Top Cap
•
Ambient Air
These sensors are field replaceable. Four sensor
receptacles are provided; three USDA and one
cargo temperature.
Fresh Air Exchange System
The fresh air exchange system removes harmful
gases from containers carrying sensitive
perishable commodities. The fresh air vent is
located above the control box. The fresh air vent
is adjustable to accommodate a variety of frozen
and chilled load operating conditions.
Fresh Air Exchange Recorder
(Optional)
The Fresh Air Exchange Recorder detects vent
disk movement. It automatically displays a value
on the LCD display.This value is also logged in
the datalogger. The entry records the time, date
and vent opening position. It mounts on the fresh
air vent door.
Figure 9: Fresh Air Exchange Recorder
AXA0427
1.
Fresh Air Exchange Vent
Figure 8: Fresh Air Exchange Vent
1
AXA0340
AJA1964
Summary of Contents for 098916
Page 5: ......
Page 11: ...Table of Contents 10...
Page 19: ...Service Guide 18...
Page 28: ...Specifications 27 Figure 2 Physical Specifications AMA313...
Page 41: ...Unit Description Features Options 40...
Page 105: ...Operating Instructions 104...
Page 155: ...Servicing The Unit 154...
Page 187: ...Index 186...
Page 189: ...Wiring and Schematic Diagrams Index 188...
Page 190: ...189 Wiring Schematic...
Page 191: ...190 Wiring Diagram Page 1 of 2...
Page 192: ...191 Wiring Diagram Page 2 of 2...