REFRIGERATION UNIT EXPANSION VALVE ASSEMBLY

TM 10-4110-262-13&P

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DIRECT SUPPORT MAINTENANCE

ADVANCED DESIGN REFRIGERATOR, 300 CUBIC FOOT (ADR-300)

4110-01-465-4158 / 4110-01-465-4564

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

(WP 0051 00, Table 2, Item 5)

(WP 0043 00)

Materials and Parts

Operation Under Usual Conditions

Refrigerant R404A (WP 0068 00, Item 16)

(WP 0005 00)

Compressor Oil (WP 0068 00, Item 5)

Preventative Maintenance Checks and Services

Valve - Expansion (WP 0058 00, Item 2)

(WP 0010 00)

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.

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.

Stop the unit and observe the low side pressure for at least two minutes. The pressure should

remain below 10-in. Hg of vacuum.

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