Recharge System (A/C-2).

TM 55-1905-223-24-17

(12)

Once you are able to maintain a vacuum reading on the gauges, disconnect the common

hoseline from the vacuum pump and connect it to a container of R-22.

(13)

Loosen the common hoseline connection at the gauge manifold momentarily, crack the

refrigerant container valve to purge the hose, and retighten the hose connection.

(14)

Crack the valve on the refrigerant container. Crack the valves (handwheels) on the

gauge manifold until the system pressure rises to 2 psig. Close the valve on the refrigerant

container and both handwheels on the manifold.

(15) Disconnect the common hoseline from the R-22 container and reconnect it to the suction

connection on the vacuum pump.

(16)

Start the vacuum pump, slowly open both handwheels on the manifold, and again

evacuate the system to 18 inches vacuum (or to limit of pump's ability).

(17) Close both handwheels on the manifold, stop the vacuum pump, and wait 15 minutes to

see that a vacuum is held.

(18) When a vacuum is maintained, disconnect the common hoseline from the vacuum pump.

(19)

The system is now ready to recharge.

Recharge System (A/C-2).

(1) The system holds 30 lb of R-22 refrigerant.

WARNING

PRESSURIZED GAS HAZARD. Handle R-22 refrigerant containers with care to

avoid personal injury. Keep containers away from external heat sources. DO NOT

DROP containers. When in use, place containers where they will not be knocked

over.

NOTE

It may take more than one container of refrigerant to fill the system.

(2) Use the scale from the refrigeration tool kit and weigh the R-22 refrigerant container, or

containers, before charging. Make sure you have enough refrigerant on hand to fill the

system. Record the container(s)' weight.

(3) Make sure both service valves are open clockwise three or four turns before charging. The

high pressure side is used for observing discharge pressure only. Do not add refrigerant

through the discharge service valve.

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