TM-5-4210-249-13-P-2

TACTICAL FIRE FIGHTING TRUCK (TFF) MODEL M1142

TECHNICAL MANUAL; OPERATOR’S AND FIELD LEVEL MAINTENANCE MANUAL WITH REPAIR PARTS AND SPECIAL TOOLS LIST (INCLUDING DEPOT REPAIR PARTS AND SPECIAL TOOLS); PART 2 OF 4

TM-5-4210-249-13-P-2 - Page 1019 of 1452

TM 5-4210-249-13&P-2

0217-7

DRAFT

0217

PURGING

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Wear protective goggles and nonleather gloves when servicing air conditioner or

injury may result.

CAUTION

Dry nitrogen gas is recommended for purging.

A pressure regulator is required to

regulate gas pressure between 0 and 200 psi (0 and 1,379 kPa).

Commercial

cylinders of nitrogen contain pressures in excess of 2000 psi (13,790 kPa).

This

pressure must be reduced to 200 psi (1,379 kPa) for purging or damage to

equipment may result.

1.

Recover system refrigerant (refer to a. Recovery).

2.

Disconnect component to be purged from air conditioning system.

3.

Install caps or plugs tightly on air conditioning system lines that were disconnected from component.

4.

Close three valves (1), (2), and (3).

TFFT00351A

WARNING

ICON 26 44