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TM 10-4110-262-13&P
DIRECT SUPPORT MAINTENANCE
ADVANCED DESIGN REFRIGERATOR, 300 CUBIC FOOT (ADR-300)
REFRIGERATION UNIT EXPANSION VALVE ASSEMBLY
REMOVE/INSTALL
INITIAL SETUP
References
Tools and special tools
Refrigeration Unit Service (WP 0031 00)
Tool Kit, Refrigeration Service
Defrost Termination Switch Removal
Materials and Parts
Operation Under Usual Conditions
Refrigerant R404A (WP 0068 00, Item 16)
Compressor Oil (WP 0068 00, Item 5)
Preventative Maintenance Checks and Services
Valve - Expansion (WP 0058 00, Item 2)
Cloth
Equipment Conditions
Personnel Required
ADR-300 set up and connected to a power
HVAC Technician (MOS 52C, AFSC 3E1x1) (1)
supply
NOTE
The following procedures involve servicing the refrigeration system.
Some of these service procedures are regulated by Federal, and in some
cases, by State and Local laws. All regulated refrigeration service
procedures must be performed by an EPA certified technician, using
approved equipment and complying with all Federal, State, and Local
laws.
NOTE
It is good practice to replace the filter dehydrator whenever the system is
opened or for an extended period of time.
REMOVE
1. Pump down the refrigerator low side.
a. Install a manifold gauge assembly.
b. Jump out the low pressure cut out (LPCO) located on the suction line behind the receiver tank
with a jumper wire.
c.
Run the unit in the cooling mode for 10 or more minutes.
d. Front seat the receiver tank outlet valve.
e. Pump down until suction pressure gauge reads a vacuum of 15-in. Hg.
f.
Stop the unit and observe the low side pressure for at least two minutes. The pressure should
remain below 10-in. Hg of vacuum.
0046 00-1
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