High Performance Oilless Commercial Refrigerant Recovery Unit User Manual 2079-1130 Rev.
Introduction Congratulations on your purchase of the STINGER high performance oilless recovery unit. Bacharach has worked hard to make the STINGER the highest performing, most portable, and easiest to use recovery unit on the market. We are committed to your complete satisfaction! CAUTION: These instructions are for personnel trained and experienced in the handling of refrigerants. Unqualified individuals should not attempt to operate this equipment.
STINGER Specifications STINGER Compatible Refrigerants R-12, R-22, R-114, R-134a, R-401A, R-401B, R-401C, R-402A, R-402B, R-404A, R-406A, R-407A, R-407B, R-407C, R-407D, R-408A, R-409A, R-410A, R-411A, R-411B, R-412A, R-500, R-502, R-507, R-509 Power • 110/120 VAC, 1 Phase, 50/60 Hz, 8 Amps • 220 VAC, 1 Phase, 50/60 Hz, 4 Amps Compressor ¾ HP High Performance Oilless Cooling Two Cooling Fans Protection High pressure cutoff at 550 psi.
Table of Contents Introduction............................................................................................. 2 STINGER Specifications ........................................................................ 3 Table of Contents ................................................................................... 4 General Safety ....................................................................................... 5 Operational Safety.............................................................
General Safety Know your equipment Read and understand the User Manual and labels affixed to the unit. Learn the application and limitations as well as the specific potential hazards of your equipment. Ground all equipment This unit is equipped with a three-pronged grounded power cord. Use the proper extension cord Keep extension cord length to a minimum.
Operational Safety WARNING: Inhalation of high concentrations of refrigerant vapors is harmful and may cause heart irregularities, unconsciousness, or death. Deliberate inhalation of refrigerants is extremely dangerous and may cause death. Vapor reduces the oxygen available for breathing and is heavier than air. Decomposition products are hazardous. Liquid contact can cause frostbite. All refrigerant containers, equipment, and hoses are under high pressure.
Description of Features 1. Inlet Gauge Displays the inlet/suction pressure of the system being evacuated. 2. Purge Valve This valve determines what function the STINGER performs. This valve is UP during recovery operations and DOWN for purging and liquid push-pull operations. 3. Inlet Port Valve Opens or closes the inlet port. Points UP (open) for all recovery operations and points DOWN for purging operations. 4. Inlet Port Refrigerant hose connection for incoming refrigerant. 5.
Description of Features Continued 1. Inlet Gauge 5. Outlet Gauge 2. Purge Valve 3. Inlet Port Valve 6. Outlet Port Valve 7. Outlet Port 4. Inlet Port 8. Circuit Breakers 11. Power Switch 9. Location of optional 80% tank full shutoff cord 12. Storage Pocket 10.
Vapor/Liquid Recovery Operations Perform the following steps when recovering refrigerant that is either in vapor or liquid form. Note: Refer to “R-410A Recovery – Special Notes” on Page 14 when recovering R-410A. 1. Turn off all electrical or mechanical power to the refrigerant device to be evacuated. 2. Make proper hose connections. Connect refrigerant hoses to recovery cylinder, STINGER, and A/C system as shown on Page 10.
Standard Recovery Hose Connections IMPORTANT NOTES FOR LIQUID RECOVERY Do not pump virgin refrigerant with the STINGER. Unlike recovered refrigerant, virgin refrigerant does not contain oil. Pumping virgin refrigerant through the STINGER will remove all lubrication from the compressor bearings, resulting in premature bearing failure. Use the liquid push-pull method or the liquid-pull method to transfer large amounts of liquid refrigerant (virgin or dirty).
Liquid Push-Pull Recovery Operations Attention: Before attempting liquid push-pull recovery operations, please review this page. A scale or liquid-sight glass can be used to determine when all the liquid is recovered. The STINGER will not pull a vacuum using the liquid push-pull recovery operation. To finish the recovery operation, you must perform vapor recovery operations as described on Page 9.
Liquid Push-Pull Operations Continued 4. Open both the vapor and liquid valves on the DOT recovery tank. 5. Turn ON the STINGER. The compressor will begin to “pull” vapors from the cylinder and “push” the liquid out of the system and into the recovery cylinder. 6. If a sight-glass is being used, you should watch it to determine when all of the liquid has been removed from the system. 7. The liquid push-pull recovery method will not pull a vacuum in the system.
Liquid-Pull Recovery / Charging Method Do not pump virgin refrigerant with the STINGER. Unlike recovered refrigerant, virgin refrigerant does not contain oil. Pumping virgin refrigerant through the STINGER will remove all lubrication from the compressor bearings, resulting in premature bearing failure. Use the liquid push-pull method or the liquid-pull method to transfer large amounts of liquid refrigerant (virgin or dirty).
R-410A Recovery – Special Notes R-410A is a replacement refrigerant for R-22. Its physical properties, however, are much different than R-22. R-410A has a higher vapor pressure and is more dense than R-22. These characteristics make recovering R-410A more difficult by putting more of a load on the compressor. Please follow the instructions below to ensure trouble-free R-410A recovery. Note: Hose connections are the same for recovering R-410A. Connect hoses as shown in the vapor recovery diagram below.
Purging the STINGER The STINGER is equipped with a pump-down purge valve that allows the technician to pump down or evacuate the STINGER before proceeding to the next recovery operation. This procedure not only eliminates cross contamination, but also conserves refrigerant. Follow the steps below to ensure your pump-down operation is performed correctly. During the purge operation the entire STINGER is pulled into a vacuum, leaving no more than 0.1 ounce of refrigerant in the unit. STEPS: 1.
DOT Recovery Cylinder Safety WARNING! This unit is capable of over-pressurizing a DOT recovery cylinder. Ensure that you are using the proper DOT recovery cylinder for the refrigerant that you are recovering. R-410A is capable of pressures exceeding 600 psi. Typical DOT recovery cylinders are rated at 350 psi with a pressure relief set at 550 psi. These cylinders should not be used with R-410A! Only cylinders rated at 400 psi with a pressure relief set at 600 psi should be used to recover R-410A.
Recovery Tips • Use the shortest hoses possible. Long hoses increase the recovery time. Remove all restrictions in the hoses. Hoses with ball valves on the ends are better than hoses that are self-sealing. Remove Schrader core valves when possible from service ports. • Always identify the refrigerant you are recovering. This will minimize cross contamination and help you plan for the amount of refrigerant you will be recovering.
Troubleshooting PROBLEM CAUSE ACTION Unit will not start – Fan does not run; compressor does not start Power Cord not attached Attach Power Cord No voltage at receptacle Verify voltage at job site Unit will not start – Fan starts and runs; compressor starts but will not stay on Optional 80% tank full shutoff cord not connected to tank Connect cord Float switch in tank is open Check tank switch with multimeter Tank is full and float switch has opened Change tanks or short cord and use scale Ci
Schematic Diagrams 19
STINGER Parts List See STINGER Exploded View on Page 21. Item No.
STINGER Exploded View 21
Compressor Parts List See Compressor Exploded View on Page 23. Part No.
Compressor Exploded View 23
Warranty / Repair Procedures Bacharach warrants this product for 1 year from the date of purchase indicated on the original sales receipt. The warranty covers all parts within the unit but excludes damage to the unit caused by misuse or mishandling. The unit’s motor brushes carry an extended warranty of 5 years. If the unit is in need of warranty service within 90 days of its date of purchase, it will be replaced with a brand new one via our over the counter (OTC) exchange program.
