Toshiba HWS-802XWHM3-E Recharging of refrigerant, 4-1Configuration of refrigerant charging

2-4. Recharging of refrigerant

Recharge, if necessary, the specified amount of new refrigerant according to the following procedure.

Recover the refrigerant, and check that no refrigerant remains in the refrigerant cycle.

Connect the charge hose to packed valve service port on the outdoor unit's gas side.

Connect the charge hose to the vacuum pump adapter.

Open fully both packed valves on the liquid and gas sides.

Open fully the handle of gauge manifold Lo, turn on the vacuum pump, and then perform vacuum evacuating.

When the compound gauge's pointer indicates

-0.1 MPa (-76cmHg), close fully the handle Lo and turn off the vacuum pump.

Let the equipment stay as it is for one to two minutes and check that the compound gauge pointer does not return.

Place the refrigerant cylinder to the electronic balance, connect the connecting hose to the cylinder and the connecting port of the electronic balance, and then charge liquid refrigerant.

(For refrigerant charging, see the figure below)

NOTE

•Never charge refrigerant exceeding the specified amount.

•If the specified amount of refrigerant cannot be charged, charge it a little at a time while running refrigerant recovery (pump down).

•Do not make additional charging.

An additional charge when refrigerant leaks changes the refrigerant composition in the refrigerant cycle, causing the characteristics change of the Air to Water Heat Pump or excessive high pressure in the refrigerant cycle with more than the specified amount of refrigerant charged. This may cause burst or an injury.

Fig. 2-4-1 Configuration of refrigerant charging

(Hydro unit)

Refrigerant cylinder (with siphon)

Check valve

(Outdoor unit)

Open

Open

Open Close

Open/close valve for charging

Service port

Electronic balance for refrigerant charging

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