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We routinely replace bearings on Ram (and any other motors) in the field. The only time shop time is necessary is if there is damage to the motor that is revealed when the bearings are removed or if...

They will unscrew, just be real careful the wire does not come off as you pull it up through the hole. Pre twist the wire befour putting the new one back in. Done it this way several times, got...

Excellent analogy man I love math reasoning. I am beginning to see the writing on the wall. Perhaps finding precision measurements may be a futile endeavor when dealing with parts that bend. I recall...

Great comments and I do appreaciate the experiances of simular circumstances. Geo it is remakable as I was wondering if there was enough play in the D flage bolt pattern to allow for the motor to...

I think you are correct on the motor flexing due to less iron as the shims were not loose at all, I watched the motor as it set down on them and they were tight. My misalinement was .008 high and...

Back again still sulking over a Ram motor gone bad during my watch. Long story short ended up with a brand new Ram motor from Johnson/York baltimore parts. 800 Hp on a york YK with a VFD. Old motor...

I had a bad experiance with a York motor recently. It Had been going through rear bearings in the past and the vibration anaylsis report confirmed the need for bearings again. Assumed bearing...

The unit will bring back the oil in about a weeks run time. Best load at over 60%. Make sure your oil return drier and low side line are isulated as this helpes keep the oil suspended in the...

The face of the damper blade has equal forse above and below the pivot point. If you can open it easy by hand then you answered the first question. 3.7 in static is high but not unherd of. It may be...

McQuay has been using victalic fittings for years they seem to do ok. We used them on a turbo core retrofit and they have not been a problem. The advantage there of cource is ease of installation.

They did a compleate energy audit on the unit and then decided that the air filters were dirty. UM?

If you dont take the job, please forward the details to my e mail.

Just bigger nuts. Dont be intimadated. Company's like young go getters as they can beat you up a little. Us old guys are to grummpy and set in our ways.

You could go to 20 degrees and your capacity would drop to 8400 btu. The compression ratio would be 5.5/1 with a discharge temp of 200 degrees. Ball park numbers as i dont no your compressor...

Your little compressor is maxed out at a 8 to 1 compression ratio. The discharge temp is kept in check by some type of refrigerant overflow to the compressor. At -20 your capacity is reduced by 70% ,...

Yes, the inrush currant of a coil is much like a motor, 5 to 6 times that of operating currant. A transformer can be sized to small if many loads come on at the same time. If the loads are staggard a...

As the coil temperature drops the specific volume of the gas increases, this causes less pounds per minute to be circulated by the fixed volume of the compressor. The mass flow- refrigeration effect...

I would like to know what a gravity condenser coil is, though.

Find the main harness that goes to the economiser option and disconnect. ?Trace out the y1 wire and jump it back to the main compressor control circuit.

Your reasons all are sound, but I have replaced maybe 5 heat exchangers in 25 years and if it is common occurance on your units it may be a design issue. Most failures I have seen are on the U bends...

I know a lot of guys like those analog type vacume gages, but I never could trust them. The pressure changes with any type of movement of the thermistor. I have gone to a micron gauge and put it...

Is that the little recip chiller with two copeland compressors? york never did really support that thing. The local UPG product group might be able to help.

Probably a dumb question but can I use a potentiometer to simulate a temperature to a controller. Is there a tool for just this type of thing.

There in lies the rub i have not seen the this system run in all possible conditions. Thanks for your interest though as this unit has been the most challanging thermodynamic system I have worked on...

Oil anaylsis, cut the oil filter apart, vibration anaylsis, check thrust if applicable.

Piped in new sporlan LLSV, no problems, works as it should. The alco valve removed is shiney, clean, no appartent damage of any kind. I will go out of my way to buy Sporlan in the future.:cheers:

Static pressure should be at its higest at the fan exist and at its lowest at the end of the run, this is due to friction loss through the duct. The duct internal area and the number of exits need...

Is the oil on the floore from the drip, or is the real problem the oil trip. Does it drip befour it trips. Is there oil in the compressor. Define the "high pressure valve" and why is it restricted.

Closed loop system, or are you talking city water supply, ground water, ect. How could you use more water? Air will take up the effective surface area of the condenser and raise the head pressure....

A 27 degree delta T across the evaporator is a problem. Air flow sounds low, check the fan amperage and compare to the other units that are running ok pressures. Depending on the coil arrangement,...

The valve will operate normally with a lower pressure differencial. At 225 psig head and a 60 psig suction it will close off, pump down like normal to 30 psig, compressor shuts off on low pressure...

Will replace, dissect, and report.

I may have to go the Sporlan route, pain in the butt to replace at this point, but don't know what else to do. The alco valve has a little round diaphram and a spring. Not to sure on how it works....

The arrow on the valve is pointed to the TXV, it is in the right way. Don't know what caused the original failure, but this problem is on my short list. It is like 200 PSI Diff is the maximum it can...

The arrow on the valve is pointed to the TXV, it is in the right way. Don't know what caused the original failure, but this problem is on my short list. It is like 200 PSI Diff is the maximum it can...

Sounds like you have no static pressure. Too many openings or too many air exits to allow for static pressure to build up and push the air out of the closest registors. Close down some of the dampers...

Water to water heat pump chiller, one of a kind I think, runs head pressure of 275Psig for hot water to the A/H of 105 degrees. Compressor had failed,after replacing I found the LLSV would at times...

Is there a maximum pressure differencial of a LLSV. Application runs 275 head 60 suction and the stinking solnoid valve sticks open unless the delta P is lower at around 225 head, 60 suction. Brand...

Typically a lock out relay has a higer resistance than the control relay and is wired in parallel with the normally closed safty devices and control relay. This keeps the lock out relay from...

Two 15 ton scroll compressors on a water cooled reverce cycle chiller, that provides water heat to the A/H in winter, And cooling water to the air handler in summer. When the weather changes and the...

looks like I got me a one of a kind rig here. Nobody seems to have seen one of these. Water to water, reverse cycle, heat pump chiller. Just my luck.

I may be all wet, but if I do the math from 130/30 degree saturated in winter mode,to 100/35 saturated in summer, the variance in tonnage is about 4 tons per circuit in Btu/Hr. Thats with ground...

Maybe clock the gas meter with just the oven on. Do the math. Boom.

I have inherated this little Continental Chiller, 30 tons, that has a listed 35 Lbs of 417A refrigerant charge. Two circuits, 15 tons each, copland scroll compressures. If i do the math it would need...

Yep, both the engineer and the chiller manufacture are out of buisness. That should tell ya something. I have been doing a lot of math and going by the Copeland compressor information I could have 4...

Say What. Generator? That could be a problem. The early YK's around 1996 or so would not handle running on a generator. There was an e prom or logic board up date that would solve the problem....

Sorry, yea there are four 2 inch supply and 4 two inch return lines coming out of the ground. They tie into a 5 inch header pipe and then to a 3 inch building loop supply and return.

Hellow... anybody out there. I realise now that my original post was kind of vague. I have learned alot in the last few days so let me run this by you. My vertical ground loop has 28 holes at 215...

Your question is to complicated for me but I have removed the filter from the circuit on past occasions with no adverse affects. Most often the chiller plant will have its own transformer supply feed...

Recently got a job with Geo thermal vertical ground loop system. It has 8 heat pumps in the 3 to 5 ton range and a 30 ton chiller all runnig off the cooling or heating affect of the ground loop. The...