TOP OF HOUSING (cont) - TM-5-4120-341-130143

TM 5-4120-341-13

T035E9-256-1

ACTION

REMARKS

LOCATION/lTEM

TOP OF HOUSING

Avoid bodily contact with liquid refrigerant and avoid inhaling refrigerant gas. Be

especially careful that Refrigerant 12 does not come in contact with eyes. In case of

refrigerant leaks, ventilate area immediately.

Discharge Refrigerant System

NOTE

In accordance with Environmental Protection Agency regulations, refrigerants cannot

be discharged into the atmosphere. A refrigerant recovery&recycling unit must be used

whenever discharging the refrigerant system.

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

ONLY.

Connect and operate a recovery/recycling unit in

accordance with the manufacturer's instructions.

Refer to paragraph 5-13 and replace dehydrator.

Dehydrator

Remove valve cap from discharge and suction

Purge Refrigerant System

service valves.

Using proper nitrogen regulator connect a cylinder

of dry nitrogen to suction service valve.

Attach suitable hose to discharge service valve.

Open both suction and discharge service valves.

Open valve on nitrogen cylinder and allow nitrogen

to flow through refrigerant system until all mois-

ture is forced out. Do not exceed 5 psig.

Close nitrogen cylinger valve.

Close suction and discharge service valves.

Remove nitrogen cylinder and discharge hose.

Using bar manifold, connect vacuum pump to cen-

ter hose. Using proper hoses, connect suction ser-

vice valve to suction pressure gage.

Turn on vacuum pump, open service valves and

hold a 29.0 inch Hg vacuum for eight (8) hours.

Close suction and discharge service valves.

Turn off vacuum pump.

Remove hoses from suction and discharge valves.

Remove vacuum pump and install valve caps.

Solder all copper-to-copper joints with silver solder

7. Soldering Procedure

type 3, 4 or 6A per specification QQ-S-561.

Solder all copper-to-brass or copper-to-steel with

type 4 or 6A per specification QQ-S-561.

Solder melting point is 1160F (625C).

Make all solder joints with an atmosphere of inert

gas to prevent internal oxidation.

5-7

Change 3