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What is the required discharge superheat for carrier 19xr chiller

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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What is not working properly?? has it gotten wet I've seen that it's not good has somebody messed with the configuration? seen that too. if you have no display then your going to need a new board. get service good luck Tom

Posted on Jul 03, 2009

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SOURCE: We would like to repair CARRIER CHILLER leakage

20% is the most you can plug. Do not go over this as you will have cooling problems.

Posted on Jan 27, 2011

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I HAVE A westinghouse a/c system in my home,one compresser for the main home an another for the up stairs.A REPAIR MAN COME TO THE HOMEM,CHECKED THE SYSTEM AND SAID I NEEDED MORE FREEON.HE ADDED SOME...

When technicians take an air conditioning course, one of the first things they learn is to use superheat to charge a fixed orifice air conditioning system.

Superheat is not hard to deal with, but the technician needs to take four good measurements.

To get the actual superheat, the technician measures suction line pressure and suction line temperature. When he reads suction line pressure, he reads the *F scale on his gauge. That's the boiling point of that refrigerant at that pressure. To get actual superheat, subtract the suction line boiling point temperature from the measured temperature of the suction line.

To read get the required superheat from the most common A/C manufacturer's superheat charts, the technician measures indoor "wet bulb" temperature and outdoor air temperature ("dry bulb"). Using these two temperatures the technician can look up the required superheat on most A/C manufacturers' superheat charts. Required superheat's can vary from 5 *F to over 45*F depending on the conditions (indoor wet bulb and out door dry bulb). The higher the load, the higher the required superheat.
The technician adds or subtracts refrigerant to decrease or increase the actual superheat to match the required superheat.

Superheat is the temperature difference between the boiling point of the refrigerant in the evaporator and the actual temperature of the refrigerant gas after the evaporator. It is the "extra" temperature (or temperature rise) the refrigerant picks up in the evaporator after it boils.

When charging the system, the technician adds as much refrigerant as he can. But if he adds too much (overcharge), he risks flooding the compressor with liquid refrigerant.

The biggest risk of flooding is under low load conditions: low outside temperatures and low indoor wet bulb temperatures. The refrigerant boils off late in the evaporator. To make sure the refrigerant is all boiled off before the end of the evaporator, the the A/C manufacturer's required superheat chart directs the technician to stop adding refrigerant when the suction line temperature gets down to within a few degrees of the boiling point inside the evaporator. The "few degrees" is the superheat. At low load conditions, the superheat is often specified as five or six degrees. It's a safety factor to make sure no liquid gets to the compressor.

At other load conditions, as determined by outdoor air and indoor wet bulb temperatures, the required superheat is given by a the superheat chart supplied by the A/C manufacturer. The higher the temperatures, the higher the load and the higher the required superheat.

Doing a superheat analysis is the best way to insure that an air conditioner has the proper charge.

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Carrier Screw chiller Model number PGI 225 -Y920 ,Ineed Trouble Shooting

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How to use it

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Hi, Its been a long time since I have worked on one but maybe the chilled water is having problems and not circulating good. Could be airlocked somewhere if its been down for a while. Hope I have helped. kstfas

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