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If you have a CPC controller, how about a CPC Checkit (P/N 508-2000)? Connects to a 16AI board and detects flash gas. Piped directly in the line up to 1 5/8. Above that you need to pipe it in a...

Emhart once owned C.V. Hill, but they are now part of Hill PHOENIX (itself owned by Dover).

http://www.hillphoenix.com/

No, it will not. The 810-3010 is a very old input board (16AI).

No contradiction intended- just meant to add there may be a gas vent with no check valve. There must be a vent of some sort as the oil check may be under oil on both sides and not allow gas to vent.

In some Copeland models there is hole (always open) that provides a vent between the crankcase and motor. It is high on the firewall, and does not equalize oil level, only pressure.

Reducing the riser is a great idea, especially for such a short pipe run. Make sure you have an inverted trap at the top (if you have any significant horizontal run) to prevent any oil collected in...

I don't have much experience with cracked SGs, but I think it is usually an uneven torque problem. When I was building racks we almost always had the glass in front with an oil float on the side. It...

http://stlouis.bizjournals.com/stlouis/stories/2004/08/02/daily12.html

It is true. We already own one flow controls company in St. Louis...

Why would we want another one? ;)

1. A scroll, like a screw or rotary, has a fixed volume ratio, so it may compress the gas more than is needed at a particular condition. Any work done beyond that needed to raise the suction gas to...

Clyde,

No, you are right, but so am I. I was thinking about the smaller (<6HP) models and you were talking about the larger (7.5 to 15HP with the internal name Specter). I should have picked up on...

Clyde,

When it comes to medium temp scroll application, R404A makes all the difference. The newer ZBKC refrigeration scroll is based on the KC scroll set from AC and it makes a kick-ass R404A...

You can get CPC manuals at our web-site:

http://www.cpcus.com

You can also call tech support at 1-800-829-2724 (or 770-425-2724) for help. Our guys will usually be at least somewhat familiar...

Sorry frozen- I was probably a little strong stating a personal opinion on the use of a solenoid with the DTC. I think the DTC is a great improvment over the cap tube for liquid injection, but I'm...

It should stay. The solenoid will prevent migration into the compressor during off-cycle.

Please!

An HVAC/R professional does not whack a compressor...

He performs an "impact adjustment."

I have to admit I don't really know about this one (gone too long from Sidney to be directly in the loop), but it doesn't sound like something Copeland would do. There has been an effort to brand...

Very nice work. I think you missed your calling.

For tightest control cycle both valves together on one t-stat to avoid pumping down between cycles, but close only the LLSV for defrost to force pump-down and promote good oil return periodically.

a distressingly common problem when you consider it reflects the low frequency of case cleaning in supermarkets.

I agree the compressor is suspect, but make sure you've got good distribution in the coil. Superheat can look great, but if only part of the coil is wet you won't get full capacity.

Low compression ratio leads to very high mass flow and broken compressors. The same fixes that were used to strengthen the Discus for HFC/POE were tried for booster application, but boosters had lost...

Floodback can ground compressors by causing bearing wear, which leads to the air gap between the rotor and stator going away. It could also be foreign material in the system.

I know you checked...

R-12,

As stated before the vast majority of supermarket cases are either 8 or 12 feet (except for door cases, which are 2,3,4, or 5 doors normally). These are then piped together to form line-ups...

Not anymore- my memory for that level of detail isn't so good, but c-dave answered for me anyway.

Don't forget that high SH doesn't just cause high discharge temp, but also might cause the motor to overheat and trip. The Copeland envelope is based on 65F RG. At -25, 90F SH is right on the edge....