To Next Page

To Previous Page

DM13-01.01.16en Air-cooled Package

Service manual 79

5.3 Expelling Air

5.3.1. From the following table, select a method of expelling air.

Table 4:

Length of connective pipe

(single pass)

Procedure of expelling air

Less than 5m Use refrigerant in the outdoor unit

5～15m Use vacuum pump or refrigerant tank.

If the air conditioner is relocated, be sure to use a vacuum pump or refrigerant tank to expel air.

5.3.1.2. Use the refrigerant in the outdoor unit to expel air (see Fig-31 and Fig-32)

Outdoor unit

oor un

Stop valve

Air side

Liquid side

pipe adapter

Fig-31

 Screw up the pipe nuts at A, B, C and D completely.

 Loosen and remove the square-head cover of valves A and B, rotate the square-head spool of valve B

counterclockwise for 45 degrees and stay for about 10 seconds, and then close the spool of valve B tightly.

 Detect leak for all adapters at A, B, C and D. After making sure that no leak exists, open the maintenance

orifice nut of valve A. After all air is expelled, tighten the maintenance orifice nut of valve A.

 Open the spools of valves A and B completely.

 Tighten the square-head cover of valves A and B completely.

5.3.1.3. Use refrigerant tank to expel air (see Fig.6-8 and Fig.6-9)

 Screw up the pipe nuts at A, B, C and D completely.

 Loosen and remove the square-head cover and the maintenance orifice nut of valves A and B.

 Connect the filler hose of the refrigerant tank with the maintenance orifice of valve A.

 Loosen the valve of the refrigerant tank, continue filling refrigerant for 6 seconds to expel the air, and tighten

the nut of valve B quickly.

 Loosen the valve of the refrigerant tank again, and fill the refrigerant for 6 seconds. Detect leak for all

adapters at A, B, C and D. After making sure that no leak exists, screw off the filler hose. After all the filled

refrigerant is expelled, screw up the maintenance orifice nut of valve A quickly.

 Open the square-head spools of valves A and B completely.

 Tighten the square-head cover of valves A and B.

5.3.1.4. Use a vacuum pump to expel the air (Fig-32) (For method of using the manifold valve, see the

operation manual of manifold valve):

Midea MTA-76CRN1 Service Manual

Other manuals for Midea MTA-76CRN1