Carrier 38QCR018713 Installation Manual download pdf (Page 13)

When relocate the unit to another place, perform evacuation using vacuum pump.

Make sure the refrigerant added into the air conditioner is liquid form in any case.

(Not applicable to the units with R22 )

Open the valve stem until it hits against the stopper. Do not try to open it further.

Securely tighten the valve stem cap with aspanner or the like.

Valve stem cap tightening torque (See Tightening torque table in previous page ).

Outdoor

unit

Indoor

unit

Refrigerant

Flare nut

Stopper

Cap

Valvebody

Packed valve

Half union

Gas side

Liquid side

Valve stem

Fig.22

Fig.23

When Using the Vacuum Pump

(For method of using a manifold valve, refer to its operation manual.)

1. Completely tighten the flare nuts, A, B, C, D, valve charge

hose to a charge port of the low-pressure valve on the gas pipe side.

2. Connect the charge hose connection to the vacuum pump.

3. Fully open the handle Lo of the manifold valve.

4. Operate the vacuum pump to evacuate. After slightly loose the

flare nut of the Lo valve on the gas pipe side check that the air is entering

(Operation noise pump changes and a com meter indicates

0 instead of minus)

5. After the evacuation is complete, fully close

manifold valve and stop the

operation of the vacuum pump.

Make evacuation for 15 minutes or more

compound meter indicates

-76cmHg (-1x10 Pa).

6. Turn the stem of the packed valve B about 45

counterclockwise for 6~7 seconds after the gas

coming out, then tighten the flare nut again. Make

sure the pressure display in the pressure indicator

is a little higher than the atmosphere pressure.

7. Remove the charge hose from the Low pressure charge hose.

8. Fully open the packed valve stems B and A.

9. Securely tighten the cap of the packed valve.

connect the manifold

starting evacuation,

and

of the vacuum pound

the

handle Lo of the

and

check that the

Manifold valve

Compound meter

-76cmHg

Handle Lo

Handle Hi

Charge hose

Vacuum pump

Pressure gauge

Low pressure valve

Fig.24

Caution in handling the packed valve

AIR PURGING

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 29 30

Comments to this Manuals

No comments

Carrier 38QCR018713 Installation Manual Page 13

Comments to this Manuals

Related products and manuals for Split-system air conditioners Carrier 38QCR018713