my adler barbour unit apears to work but does not get cold. the fan runs and the unit runs i have a set of gauges and some r134 refrigerent but need advice on how to use them i have checked thne pressure in the condencer which is 28 psi please can someone help me
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Servicing an Adler Barbour
These small units are very sensitive when it comes to servicing them with refrigerant. If the compressor is a model BD2.5 it must be serviced with R12 refrigerant. If the compressor is one of the following 134a refrigerant can be used, BD3, BD35 or BD50. Connecting a servicing gauge set to these units if not done properly can be destructive to the system. Here are some simple guide lines to follow when you question the refrigerant level: 1. A system low on refrigerant may be running in a vacuum so do not connect the gauge set when it is running. 2. Purge gauge set and hose with refrigerant before connecting it. These small systems only contain 2 to 5 ounces of refrigerant and can easily be contaminated. 3. The amount of refrigerant pressure in the system when the gauge is connected is only an indication of whether all refrigerant was lost or there is still some left in the system. Pressure in a capillary tube system when it is not running is relative to the ambient temperature of all the components. 4. If there is no pressure when gauge is connected, pressurize the system find the leak and repair it. After the leak is repaired Vacuum system and service it. 5. These systems are normally serviced by adding the correct volume, but in the field when a measuring cylinder is not available they can be serviced by pressure in the suction side of the system. This pressure will very based on evaporator size, type of refrigerant and temperature in the evaporator. One ounce plus or minus from the correct volume will greatly effect the power consumption and performance. 6. If you have the small Abler Barbour with their small chamber (bin) evaporator the correct suction pressure with a 70 degree F. box and warm evaporator would be 8 to 10 psi for R12 refrigerant and 6 to 8 psi for 134a refrigerant. These readings must be reached in a time window of ten to fifteen minutes after start up with a warm box. After fifteen minutes the suction pressure will drop as the plate temperature drops. 7. My 12/ 24 Volt Boat Refrigeration Manual has save many boaters hundreds of dollars. From the author of four books on boat refrigeration. For more tips on boat refrigeration see my web site. http://www.kollmann-marine.com
These small units are very sensitive when it comes to servicing them with refrigerant. If the compressor is a model BD2.5 it must be serviced with R12 refrigerant. If the compressor is one of the following 134a refrigerant can be used, BD3, BD35 or BD50. Connecting a servicing gauge set to these units if not done properly can be destructive to the system. Here are some simple guide lines to follow when you question the refrigerant level: 1. A system low on refrigerant may be running in a vacuum so do not connect the gauge set when it is running. 2. Purge gauge set and hose with refrigerant before connecting it. These small systems only contain 2 to 5 ounces of refrigerant and can easily be contaminated. 3. The amount of refrigerant pressure in the system when the gauge is connected is only an indication of whether all refrigerant was lost or there is still some left in the system. Pressure in a capillary tube system when it is not running is relative to the ambient temperature of all the components. 4. If there is no pressure when gauge is connected, pressurize the system find the leak and repair it. After the leak is repaired Vacuum system and service it. 5. These systems are normally serviced by adding the correct volume, but in the field when a measuring cylinder is not available they can be serviced by pressure in the suction side of the system. This pressure will very based on evaporator size, type of refrigerant and temperature in the evaporator. One ounce plus or minus from the correct volume will greatly effect the power consumption and performance. 6. If you have the small Abler Barbour with their small chamber (bin) evaporator the correct suction pressure with a 70 degree F. box and warm evaporator would be 8 to 10 psi for R12 refrigerant and 6 to 8 psi for 134a refrigerant. These readings must be reached in a time window of ten to fifteen minutes after start up with a warm box. After fifteen minutes the suction pressure will drop as the plate temperature drops. 7. My 12/ 24 Volt Boat Refrigeration Manual has save many boaters hundreds of dollars. From the author of four books on boat refrigeration. For more tips on boat refrigeration see my web site. http://www.kollmann-marine.com
Richard: Thanks For Weighing In
And BTW, your advise saved me hundreds of dollars in my last service. I had had a mechanic change my 2.5 to 134. It was a mess. He (the boss) came out and changed back to R12 and no problem now. I still think the unit is on its last legs, but it's working. Rick D.
And BTW, your advise saved me hundreds of dollars in my last service. I had had a mechanic change my 2.5 to 134. It was a mess. He (the boss) came out and changed back to R12 and no problem now. I still think the unit is on its last legs, but it's working. Rick D.
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