SOLENOID VALVES AND HOT GAS BY-PASS VALVE DIRECT SUPPORT MAINTENANCE REPLACEMENT

TM 9-4120-425-14&P

SOLENOID VALVES AND HOT GAS BY-PASS VALVE

DIRECT SUPPORT MAINTENANCE REPLACEMENT

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THIS WORK PACKAGE COVERS:

Test, Removal, and Installation

INITIAL SETUP:

Maintenance Level

Direct Support

Tools and Special Tools

Tool Kit, General Mechanics (Item 1, Table 2, WP 0118-00)

Tool Kit, Service, Refrigeration Unit (Item 2, Table 2, WP 0118-00)

Recovery and Recycle Unit, Refrigerant, (Item 5, Table 2, WP 0118-00)

Mask, Air Filtering (Item 29, Table 1, WP 0121-00)

References

WP 0118-00 (MAC)

WP 0039-00 (Coil Replacement)

Equipment Condition

Mode selector switch in OFF position.

Main power source is disconnected.

Top rear panel removed (WP 0019-00).

Condenser fan motor nearest hot gas by-pass valve removed (See WP 0031-00).

Condenser fan scroll and bracket nearest hot gas by-pass valve removed (See WP 0062-00).

Recover refrigerant from system (See WP 0049-00).

System purged with nitrogen (See WP 0050-00).

Debraze related tube connections (See WP 0079-00 and WP 0051-00).

Test Equipment

Electronic refrigerant gas leak detector

Materials/Parts

Nitrogen (Item 4, Table 1, WP 0121-00)

Brazing alloy (Item 5 or 6, Table 1, WP 0121-00)

Brazing flux (Item 7, Table 1, WP 0121-00)

Special Environmental Condition

NOTE

In accordance with Environmental Protection Agency regulations, refrigerants

cannot be discharged into the atmosphere. A refrigerant recovery and recycling unit

must be used whenever discharging the refrigerant system.

Operation of the recovery/recycling unit must be by AUTHORIZED PERSONNEL

ONLY.

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