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Old 08-07-2011, 03:22 PM   #31
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Refrigerant Problem


I believe that as well, so does my boss. The original service re-call on this unit was due to on the Fourth of July the condenser fan motor went out. Another tech from my company went out back then and replaced it but ever since then the system hasn't been the same, hasn't been able to satisfy. It used to until that day. 1/4 hp 1075 rpm 208/230v fan motor, single phase.

I do not have the compressor model number, only the condenser. You want that, would it help?


Last edited by Doc Holliday; 08-07-2011 at 03:32 PM.
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Old 08-07-2011, 03:47 PM   #32
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Refrigerant Problem


on your first pic there is the model #, above it product # and above it should be the serial #. Carriers are easy to read. ie 1697A is 1997 unit or the first 2 digits are the yr. usually the 2 B4 the letter are the yr code. there is a separate RLA or full load amps on that sticker for the compressor only so you need to read it off the contactor wire to the compressor not the incoming line as the condensor motor adds to that reading.
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Old 08-07-2011, 03:50 PM   #33
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Generally, Carrier is first 2 digits is the week, second 2 are the year.
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Old 08-07-2011, 08:57 PM   #34
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Refrigerant Problem


Now, not to sling mud in anyones face, but why didn't you guys tell him to pump it down? That would have been the first logical step after getting his super/sub numbers.
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Old 08-08-2011, 04:19 AM   #35
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Refrigerant Problem


Generally can't pump down an over charged system. The con denser can't hold all of the refrigerant. Seen a few compressors condemned because the system was over charged.
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Old 08-09-2011, 10:47 PM   #36
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Refrigerant Problem


i've never used it myself but isnt there a tool that you can hook up to the compressor to determine the ACTUAL efficiency of it? anybody used one of those yet? how much do they cost?
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Old 08-09-2011, 10:56 PM   #37
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Refrigerant Problem


Why yes there is..its called a refrigerant manifold gauge set. Comes with manifold, high and low side gauges, red, blue and yellow hoses. Cost is $79-$600, depending on the model and features that you use.
Also recommended is the digital multi-meter with amp clamp, and k-type thermocouple inputs. Price is $29-???, depending on features and accuracy. You can get real fancy and spring for the watt-meter, if you wish.
You may need a couple of accessories like a piercing valve, and a calculator.
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Old 08-09-2011, 10:57 PM   #38
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Refrigerant Problem


Sorry...just had to do it....will be nice the rest of the week.
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Old 08-09-2011, 11:14 PM   #39
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Refrigerant Problem


theres another tool that you can hook up to directly at the discharge and at the suction of the compressor. litterally at the compressor. it will determine actual capacity of compressor, % efficiency of it and whether valves are worn.
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Old 08-09-2011, 11:28 PM   #40
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Refrigerant Problem


im not sure if you know what im talking about... : /
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Old 08-10-2011, 12:13 AM   #41
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Refrigerant Problem


Quote:
Originally Posted by beenthere View Post
Generally can't pump down an over charged system. The con denser can't hold all of the refrigerant. Seen a few compressors condemned because the system was over charged.

a few pump downs I've had to regulate the low and high side to allow it to pump down. Not sure if overcharged or under or what, just that if I didn't leave the high side a bit cracked the compressor would kick out.
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Old 08-10-2011, 04:28 AM   #42
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Quote:
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im not sure if you know what im talking about... : /

I think I know what tool your talking about. Its snake oil though. I've seen the stickers on units its been used on.

No tool can determine capacity of a compressor without knowing the line set length, the vertical rise or drop of the line set, the evap coil pressure drop, the air flow volume over both coils, and a few other things.

There are several computer programs where you can enter most of that info, an d they will tell you the capacity the system is operating at, at that time of the check.

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