Internal OL tripping

[tonydykes55]

Will do. Gotta go for now. I'll check back.

[tonydykes55]

Sucked it down today. Pulled deep vac. New charge - weighed in nameplate charge exactly. Same symptoms. Valves sound loud. Pulling excessive amps - 90 - 110. Kicking breaker.

[timebuilder]

How are the SH and SC numbers? This can tell you what the refrigerant is doing.

[tonydykes55]

Trips within a few seconds. Wont run long enough to get sc & sh. Tenfirst time i cut it on with new charge it ran maybe a minute or so - the pressures looked good for the time it was running - suc 75 Head 250. But it was loud. The valves sound like theyre gone - clattering. I plan on ordering a rebuilt comp tomorrow. Comes with full warranty. I even changed the oil today. Got to be bad compressor valves.

[darkbeekeeper]

Wow

[timebuilder]

Trips within a few seconds. Wont run long enough to get sc & sh. Tenfirst time i cut it on with new charge it ran maybe a minute or so - the pressures looked good for the time it was running - suc 75 Head 250. But it was loud. The valves sound like theyre gone - clattering. I plan on ordering a rebuilt comp tomorrow. Comes with full warranty. I even changed the oil today. Got to be bad compressor valves.

Well, keep us informed about the new compressor. I take it you heard the same noise initially, when you would reset the compressor, and it would run for a day, right? Or is the noise new? Did the suction line temp drop when it ran, and did the space cool for the 24 hours or so when it would run?

[tonydykes55]

As stated earlier, my very first call (when it was still cooling) was a noise problem. And it's gone downhill since. I'm headed out today, thanks. Oh and being my pressures look good I have no reason to suspect a bad txv, right?

[Push It]

If it is an 06D did you check the oil level. I have read (never experienced it) that a high oil level can cause increased amp draw on the semihermetic because the crank is sumerging in it. A high oil level could also have caused the compressor to bust something interally. Does anyone else see this as possible? Again I have never run into it yet myself.

[tonydykes55]

Sight glass was very dark. Could see no oil, although it had a good bit?..I drained and replaced with 115 oz to specs

[carmon]

oh boy...... troubles abound

[tonydykes55]

Set the new compressor tues. it rained for two days so I got back up today and started it. Pulled vac & weighed charge. Running beautiful. Head 235, suction 65. Has a txv. Sc = 12 Sh = 25. Haven't checked air temp. Suction line was very cool & sweating, which it never did before. Started up nice and quiet. Amps dropped to 50. Sounds much better. Thanks again for all the help. Oh by the way this was my first semi-hermetic changeout - and my first comp changeout above a 5 ton.

[Six]

Does that 06d have an unloader ?

And if it has a mechanical unloader did you check the cut in and cut out SPs

Hell even if it has a electrical unloader it operation needs to be confirmed.

I always try to run down what killed the comp in the first place.

It might have slugged on start-up if it had internal mechanical damage.

I have a couple of 06ds in an old theater that were put in in 1974.

Still pumping.

Carlyse 06Ds

[tonydykes55]

The old one had unloader. I wasn't sure if there was a problem with the old one or not so I called manufacturer. He explained that depending on how the system was set up determined whether it was needed it or not. He said if the suction ever ran low the unloader would keep the pressure up. That's what I understood. I haven't hooked it up. It came width a sleeve that holds the valve open, if I'm correct, in the event that an unloader is not installed. That is how I left it. I'm glad you brought this up. Can you tell me more about it? Should I install it and if so how do I check it's operation? There is a low pressure switch.