Carrier RAV-SP180UT-UL Service Manual

Contents

Carrier RAV-SP180UT-UL Service Manual Manual pdf 31 page image

– 31 –6-3. Tools6-3-1. Required ToolsRefer to the “4. Tools” (Page 8)6-4. Recharging of RefrigerantWhen it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to thefollowing steps.(INDOOR unit) (Liquid side)Refrigerant cylinder(With siphon pipe)Check valve(Gas side)Open/Close valvefor chargingElectronic balance for refrigerant chargingOpened(OUTDOOR unit)ClosedService portConnect the charge hose to packed valve service port atthe outdoor unit’s gas side.Recover the refrigerant, and check no refrigerant remainsin the equipment.(For refrigerant charging, see the figure below.)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 fullyopened position, and turn on the vacuum pump’s powerswitch. Then, evacuating the refrigerant in the cycle.When the compound gauge’s pointer has indicated–101 kpa (–76 cmHg), place the handle Low in thefully closed position, and turn off the vacuum pump’spower switch.Keep the status as it is for 1 to 2 minutes, and ensurethat the compound gauge’s pointer does not return.Set the refrigerant cylinder to the electronic balance,connect the connecting hose to the cylinder and theconnecting port of the electronic balance, and chargeliquid refrigerant.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 therefrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the specifiedamount is charged, and working pressure in the refrigeration cycle becomes abnormally high pressure, andmay cause a rupture or personal injury.Fig. 6-4-1 Configuration of refrigerant charging