Tools; Recharging Of Refrigerant - Toshiba RAV-GM1101AT8P-E Service Manual

6-3. Tools

6-3-1. Required Tools
Refer to the "4. Tools" (Page 14)

6-4. Recharging of Refrigerant

When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to
the following steps.
Recover the refrigerant, and check no
refrigerant remains in the equipment.
Connect the charge hose to packed valve
service port at the outdoor unit's gas side.
Connect the charge hose of the vacuum
pump adapter.
Open fully both packed valves at liquid and
gas sides.
Place the handle of the gauge manifold Low in the
fully opened position, and turn on the vacuum
pump's power switch. Then, evacuating the
refrigerant in the cycle.
1) Never charge refrigerant exceeding the specified amount.
2) If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.
3) Do not carry out additional charging.
When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the
refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the specified
amount is charged, and working pressure in the refrigeration cycle becomes abnormally high pressure, and
may cause a rupture or personal injury.
Refrigerant
cylinder (With
siphon pipe)
Electronic balance for refrigerant charging
(INDOOR unit) (Liquid side)
(Gas side)
Check valve
Open/Close
valve for charging
Fig. 6-4-1 Configuration of refrigerant charging
- 30 -
When the compound gauge's pointer has indicated –
0.1 Mpa (–76 cmHg), place the handle Low in the
fully closed position, and turn off the vacuum pump's
power switch.
Keep the status as it is for 1 to 2 minutes, and
ensure that the compound gauge's pointer does not
return.
Set the refrigerant cylinder to the electronic balance,
connect the connecting hose to the cylinder and the
connecting port of the electronic balance, and
charge liquid refrigerant.
(For refrigerant charging, see the figure below.)
(OUTDOOR unit)
service valve
Opened
service valve
Closed
Service port
FILE NO.SVM-18044