OPERATION & MAINTENANCE MANUAL TC640 Refrigerant Management Center (Convertible For Use With R12 or R134a) RTI TECHNOLOGIES, INC.
TABLE OF CONTENTS TC640 Before Using . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Filling the Charging Cylinder . . . . . . . . . . . . . . . . . . . . . . . 5 Recover/Recycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Oil Drain & Air Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RTI Technologies, Inc. BEFORE USING THE TC640 Check for any shipping damage. discovered. Place a claim with carrier if damage is DO NOT USE A DAMAGED UNIT. The TC640 should not be operated or serviced by any person who has not read all the contents of this manual. Failure to read and comply with these instructions or any one of the limitations noted herein can result in serious injury and/or property damage.
RTI Technologies, Inc. SAFETY PRECAUTIONS ! Recover and Charge only the refrigerant for which the machine is configured. ! Wear safety glasses and protective gloves. Refrigerant has a very low boiling point and can cause frostbite. ! Follow the TC640 operating procedures sequentially to avoid prematurely disconnecting hoses or opening valves which may release refrigerant to the atmosphere. ! Do not expose the TC640 to moisture or operate in wet areas.
RTI Technologies, Inc. L CAUTION 7 Avoid breathing refrigerant or lubricant vapor or mist. Exposure may irritate eyes, nose and throat. If accidental system discharge occurs, ventilate work area before resuming service. Additional health and safety information may be obtained from refrigerant and lubricant manufacturers. Special Considerations with R134a R134a has been shown to be nonflammable at ambient temperature and atmospheric pressure.
RTI Technologies, Inc. FILLING THE CHARGING CYLINDER A/C Systems requiring service often do not have a full charge of refrigerant. To avoid unnecessary repositioning of hoses it is recommended that the TC640 be filled until about 1.5Kg of liquid refrigerant can be seen in the Charging Cylinder Sight Glass. The Sight Glass is visible through a slotted opening on the front of the TC640. Figure 1 Filling the Cylinder To fill the TC640 Charge Cylinder, refer to Figure 1 and follow these steps: 1.
RTI Technologies, Inc. RECOVER/RECYCLE Figure 2 Recover/Recycle To Recover/Recycle, refer to Figure 2 and follow these steps: 1. Attach Red and Blue Hoses to the A/C system per the vehicle manufacturer's instructions. Note For R134a Machines Field Service Couplings on the ends of Service Hoses are of a special design. The valves have LEFT HAND threads which makes operation opposite to that of others. To Close... Turn Counter-clockwise To Open...
RTI Technologies, Inc. A small quantity of Liquid refrigerant will probably still remain in the A/C System. This can be detected by observing an increasing pressure reading on the Low Side Gauge. The Low Side Gauge should remain at a stable vacuum level for at least 2 minutes before removing the hoses from the A/C system. ... NOTE ... As refrigerant is processed by the TC640, temperature variations can cause vapor to change to liquid which may temporarily settle in various internal components.
RTI Technologies, Inc. OIL DRAIN & AIR PURGE Oil and Non-condensable Gas (Air) are separated from the recovered refrigerant and MUST be removed following EACH recycling procedure as follows: 1. PRESS and hold the Purge Button (To the right of the Purge Chart) for 5 seconds. 2. SLOWLY open the Oil Drain Valve (Bottom of Long Combo Filter on back of TC640) to vent Non-condensable Gas and drain any oil which may have been removed from the A/C System.
RTI Technologies, Inc. VACUUM If the A/C System is "opened" for replacing components, it is important to draw a vacuum on the system before recharging with refrigerant. The following steps should be followed: Figure 3 Deep Vacuum To Deep Vacuum the A/C System, refer to Figure 3 and follow these steps: 1. Connect Red and Blue Hoses to the high and low sides of the A/C System. 2. Open Low and High Gauge Valves. 3. Open Red and Blue Hose Valves. 4. Press top (ON) of rocker switch marked DEEP VACUUM. 5.
RTI Technologies, Inc. HOSE EVACUATION It's important that Air not be introduced into the A/C System during a Charging procedure. If a Vacuum procedure was performed previously, the following Hose Evacuation Procedure is not required. If the service valves on the hoses have been open, the following procedure must be performed: Figure 4 Hose Evacuation To Evacuate Hoses, refer to Figure 4 and follow these steps: 1. Close Red and Blue Hose Valves. 2. Open High and Low Gauge Valves. 3.
RTI Technologies, Inc. CHARGE - HIGH SIDE Figure 5 Charge - High Side To Charge Refrigerant, refer to Figure 5 and follow these steps: 1. Perform Hose Evacuation described previously. 2. Connect Red Hose to the A/C System high side per the vehicle manufacturer's instructions. Do not open the hose valve. 3. Press top (ON) of rocker switch marked CHARGE/HIGH SIDE. 4. Open High Gauge Valve. The Low Gauge Valve and both Hose Valves should be closed. 5.
RTI Technologies, Inc. EXAMPLE: The level of liquid visible in the TC640 Charging Cylinder Sight Glass is 3.4Kg and the A/C system capacity is 2.0Kg. The following calculation results... (3.4) - (2.0) = 1.4 Therefore, the sliding indicator should be set at 1.4Kg in this example. When the liquid level lowers to the 1.4Kg mark, a charge of 2.0Kg will have been delivered NOTE... The Sight Glass on the Charging Cylinder has markings for both R12 and R134a. Always use the correct scale for accurate charging.
RTI Technologies, Inc. SCHEDULED MAINTENANCE BEFORE EACH USE... Check the oil level in the Compressor DAILY before using. The Oil Level Sight Tube is visible through a cut-out in the left side of the black Compressor Cover at the bottom of the TC640. The oil level should be no higher than half way up in the nylon tube. Add oil to the Compressor as follows: 1. Determine the correct amount of oil to add: Add 4.7cc of oil per 1mm increase in level. 2. Turn both High and Low Side Gauges to OFF. 3.
RTI Technologies, Inc. PROBLEMS & SOLUTIONS On rare occasion the TC640 may seem to be performing differently or not at all. Experience has shown that varying operating conditions can affect the performance characteristics of the TC640. The temperature of the vehicle A/C System will affect how the TC640 performs. Following are typical problems with explanations of the possible cause and solution. PROBLEM: My TC640 worked fine all last Summer.
RTI Technologies, Inc. PROBLEM: I turned a cylinder of new refrigerant up-side-down to precharge the Charging Cylinder with liquid. The Charging Cylinder didn't fill and now the TC640 won't recover from an A/C system. SOLUTION: The TC640 has been overloaded with liquid refrigerant (See Safety Precaution Section at the beginning of this manual). ... WARNING ... IF A CYLINDER IS TURNED UP-SIDE-DOWN, THE TC640 WILL OVERFILL WITH LIQUID REFRIGERANT. THIS OVER FILLS THE SUCTION ACCUMULATOR WITH LIQUID.
RTI Technologies, Inc.
RTI Technologies, Inc.
