Add Liquid in the Low Side to Complete Charging

TM 10-4110-262-13&P

0031 00

Add Liquid in the Low Side to Complete Charging

1. Back seat the discharge service valve (DSV) and open it to the service port. Gauge the suction

service valve (SSV).

2. Set the bottle to withdraw liquid. Close the manifold high pressure hand valve.

3. Run the unit in cool and read the suction pressure.

4. Open the manifold low pressure valve to allow liquid to enter and suction pressure to increase

approximately 25 psi.

5. When the correct weight has been added, close the hand valve at the refrigerant bottle.

6. Remove the manifold gauge assembly.

7. Use good caps and seals and secure the service port caps and valve stem covers before returning

the unit to service.

Low-Side Pump Down

Use the low-side pump down procedure to test for internal high- to low-side leaks and to perform low-side

service with refrigerant loss. This procedure should be used in conjunction with the following service

procedures:

Add or remove refrigerant oil,

Clean expansion valve screen,

Change expansion valve, or

Replace the dryer.

1. Install a manifold gauge assembly.

2. Jump out the low pressure cut out (LPCO) located on the suction line behind the receiver tank with a

jumper wire.

3. Run the unit in the cooling mode for 10 or more minutes.

4. Front seat the receiver tank outlet valve.

5. Pump down the low side to a vacuum of 15 inches.

0031 00-3