TIAGO

HVAC 43 9. If any leaks are found, the system must be dis- charged before rectification. 10.Rectify any leaks and recheck for leaks during evacuation prior to charging. (c) Using Soap Solution/ Leak detector spray: A leak detector spray or soap solution can be used to detect the leak by spraying it at the joints. If there is a leak bubbles are formed. 10.2.2 REGULAR MAINTENANCE A. REFRIGERANT RECOVERY, RECYCLING AND RECHARGING !! WARNING  Air conditioning system is charged with a high pressure, potentially toxic refrigerant. Repairs or servicing must only be carried out by an operator familiar with both the vehicle system and the charging and testing equipment.  All operations must be carried out in a well- venti- lated area away from open flame and heat sources.  Always wear safety goggles and gloves when opening refrigerant connections. Wear eye and hand safety protection. Open connections slowly and carefully when liquid or pressure is present, allowing it to bleed off slowly. ! CAUTION Overcharging air conditioning system will cause ex- cessive head pressure. An air conditioning portable Refrigerant Recovery Recycling Recharging Station or Refrigerant Recov- ery Unit (RRU) for use with R134a refrigerant incorporates all the features necessary to recover refrigerant R134a from the air conditioning system, to filter and remove moisture, to evacuate and re- charge with the reclaimed refrigerant. The unit can also be used for performance testing and air condi- tioning system analysis. The operator must adhere to the equipment manu- facturers’ instructions. The RRU set up is as shown in following figure: (I) RECOVERY AND RECYCLING The following procedure is usual for the use of Re- frigerant Recovery, Recycling and Recharging station or Refrigerant Recovery Unit (RRU) when recovering refrigerant from a car air conditioning sys- tem. 1. Connect a Refrigerant Station to the high and low pressure servicing connections located inside hood. 2. Operate the refrigerant recovery system accord- ing to the manufacturer’s instructions and recover the refrigerant and oil from the vehicle. 3. Measure the amount of oil discharged from the system. Add an equal amount of new refrigerant oil before evacuation operation.  !CAUTION  Refrigerant must always be recycled before re- use, to ensure that the purity of the refrigerant is high enough for safe use in the air conditioning system.  R134a Refrigerant Recovery Recycling Recharg- ing Station must not be used with any other type of refrigerant.