The PROMAX RG6-E is a refrigerant recovery unit designed for efficient and safe handling of refrigerants. This device is manufactured by Bosch Automotive Service Solutions GmbH.
Function Description
The primary function of the PROMAX RG6-E is to recover refrigerant gas from various systems. It is capable of both normal recovery and self-purge/auto evacuate operations. The unit is designed to handle a variety of refrigerants, including R12, R22, R134A, R401A, R401B, R401C, R402A, R402B, R404A, R406A, R407A, R407B, R407C, R407D, R408A, R409A, R410A, R411A, R411B, R412A, R417A, R422A, R422D, R427A, R500, R502, R507, R509. It is important to note that it is not intended for use with Category I (e.g., R11, R123), Category II (e.g., R114), or Category VI (e.g., R13, R23) refrigerants.
The recovery process involves connecting the unit to the system being serviced and the recovery tank. The RG6-E features a low-pressure switch that automatically shuts off the unit when the vacuum stage has been reached, ensuring efficient recovery. It also incorporates a high-pressure shut-off switch set at 38.5 bar (550 PSI) to prevent overfilling and potential damage.
The unit supports different recovery methods, including "Push/Pull" for large amounts of liquid refrigerant and "Sub Cooling" for enhanced recovery efficiency. For purging non-condensable gases from an identified refrigerant in a tank, the unit allows for monitoring temperature and pressure to determine the appropriate time for purging.
Important Technical Specifications
- Power Source: 230V / 50-60Hz
- Power: 3/4 HP
- Dimensions: 430 x 230 x 305 mm
- Weight: 14.5 kg
- RPM's: 1437 rev./min
- Max. working pressure: 550 p.s.i. (38.5 bar)
- Safety Device: Safety pressure switch with Automatic reset (550 p.s.i. / 38.5 bar)
- Refrigerant Compatibility: R12, R22, R134A, R401A, R401B, R401C, R402A, R402B, R404A, R406A, R407A, R407B, R407C, R407D, R408A, R409A, R410A, R411A, R411B, R412A, R417A, R422A, R422D, R427A, R500, R502, R507, R509.
- Refrigerant Storage: Approved cylinders with a minimum of 41 bar (595PSI) working pressure are required. Overfilling cylinders is strictly prohibited.
- Filter: An in-line filter is required to prevent foreign material from entering the unit and to reduce the risk of damage. The use of two size 162 filter driers is recommended for servicing machines that have "Burned Out" refrigerant.
Usage Features
The PROMAX RG6-E is designed for user-friendly operation with clear controls for recovery and purge/evacuate functions.
- Operating Controls: The unit features a POWER switch (ON/OFF) and a rotary valve with positions for "RECOVER," "CLOSED," "PURGE," and "OUT."
- Normal Recovery Procedure:
- Inspect the RG6-E to ensure it is in good operating condition.
- Connect the RG6-E to the service manifold and system.
- Open the liquid port of the recovery cylinder and the outlet port of the RG6-E.
- Open the liquid port of the manifold gauge set, then the liquid port of the system.
- Connect the RG6-E to a 230V 50Hz outlet.
- Switch the POWER switch to ON.
- Slowly open the Inlet port on the RG6-E.
- Run until the minimum required vacuum is achieved.
- Close the manifold vapor and liquid ports, then the RG6-E inlet port.
- Shut off the unit and proceed with the Self Purge procedure.
- Self Purge / Auto Evacuate: This feature allows the unit to purge remaining refrigerant from its internal components, preventing cross-contamination. To activate, turn the unit off, close the Inlet port, turn the unit to Purge position, and turn the Inlet port to Purge position, then restart the unit.
- Low Pressure Switch: The RG6-E is equipped with a low-pressure switch that automatically shuts off the unit when the vacuum stage is reached (0.45 bar absolute). This prevents the unit from running unnecessarily and helps achieve a deep vacuum.
- High Pressure Shut-off: The unit has an internal pressure shut-off switch that activates at 38.5 bar (550 PSI) to prevent over-pressurization. If activated, the switch will reset when the pressure drops below 28 Bar (400PSI).
- Refrigerant Recovery Methods:
- Tank Pre or Sub Cooling: This method involves pre-cooling the recovery tank to improve recovery rates. A minimum of 2.5 kg of liquid refrigerant is recommended in the tank.
- "Push/Pull" Method: This method is used for recovering large amounts of liquid refrigerant. It involves using the system's own pressure to push liquid into the recovery tank.
- Purging Non-Condensable Gases: This procedure involves allowing the tank to sit undisturbed for 24 hours, determining the ambient temperature, and then referring to a refrigerant pressure/temperature chart to identify the pressure for purging.
Maintenance Features
Proper maintenance is crucial for the longevity and efficient operation of the PROMAX RG6-E.
- Filter Replacement: A filter must always be used to prevent foreign material from damaging the unit. Filters should be replaced frequently. For "burned out" systems, two size 162 filter driers are recommended.
- Cleaning: The unit should be kept clean and free of spills or open containers of gasoline or other flammable liquids.
- Storage: When not in use, the unit should be stored in a dry, cool place. It is recommended to purge any residual refrigerant and purge with dry nitrogen before storage.
- Hoses and Valves: Regularly inspect hoses and valves for wear and tear. Schrader valves and core depressors should be checked for proper sealing. Gaskets and O-rings should be replaced if deformed or damaged.
- Oil Management: The recovery of large amounts of liquid refrigerant can sometimes carry oil. If the system being serviced doesn't have an adequate oil separator, it is important to measure the oil in the recovery tank and charge back into the system. The unit is designed to handle some oil, but excessive oil can reduce efficiency.
- Keeping the Dirt Out: During recovery, debris can potentially damage the unit. Using an in-line filter is essential to protect the system from contamination.
- Chilling the Tank: To improve recovery speed, especially during hot weather, the storage tank can be chilled. This can be achieved by placing the tank in an ice bath or using a fan to increase cooling.
- Troubleshooting: The manual provides a detailed troubleshooting flowchart to diagnose common issues, such as the motor running but no pumping, high-pressure shut-off activation, or failure to achieve a vacuum. If issues persist, contacting PROMAX service is recommended.
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