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72 degree water sounds too cold for a screw .I believe design is 85 in .There are no guide vanes, but a slide valve .I would log the machine and check the approaches.225 sounds high.I would be...

I carry a drum heater on my truck at all times.It has an adjustable thermostat on it.Its a heck of alot lighter that carrying a recovery machine up on the roof and alot faster than a halogen lamp.

The oil pump back proceedure works well if its tripping on the oil level switch.There are no oil heaters on the HXCs,on the newer hxcs ,the transducers arent calibratable, but certainly a good idea...

Ideally yes,I needed my boss to step up to the plate and buy one.

I have used a triple evac when I had a chiller barrel freeze up .I replaced the chiller barrel, but there was plenty of moisture in the system.It took me a week and a half to pull a good micron...

So what if the flow swith fails?There needs to be a secondary safety imo.A manual reset low temperature cutout would probably do, set to 34 degrees.

You cant run that machine with 66 degree water going thru the condenser.Design on those machines is 85 in and 95 out.Somehow you need to warm up the water.You can try throttling down the leaving...

Hvacpartners.com is your friend.None of the manufacturers are gonna give you teardown manuals for free.Slamming a company just because you didnt get your way will get you nothing here.I dont think...

I would put it at the highest point in the system.Thats the most likely place for air to get trapped.I would put a ball valve there so you can remove it and change it out when neccesary.And you can...

I wonder if he ever measured the discharge line temperature?If it got hot enough to blow the high temperature device then the discharge had to get plenty hot .If his guage only read 140, there is a...

I see way too many suction driers out in the field that are either left in or installed incorrectly.I usually replace the oil , refrigerant and liquid line driers with acid cores and then replace...

Yep,had the same problem with a Carrier screw.Machine was on the roof and the piping left the barrel and 4 feet later did a 90 and went straight into a tank 40 feet below.Put a circuitsetter in and...

.It sounds to me for sure like an oil return problem.I would find out what kind of ambient controls are on the unit and at what pressures they are able to maintain.It could be that an unloader is not...

I agree, they were a little ahead of their time.Lets face it , most of the GTs are getting up there in years too. I actually have not replaced a ton of exvs on this particular model.Sensors is...

Unfortunately this happens more often than I care to admit.I was sent on a manufacturer specific control job and was told i needed a software 2 hrs away from the office.I was told a helper was gonna...

It isnt always the techs fault for not being profitable.I have been out on jobs where the salesman has really missed the mark in selling a quoted repair or a contract pm where they just give you...

Non union companies that tell you they start their guys out at 25 are usually talking about before benefits.Sometimes they will include health insurance.My package is worth about 54.00 an hour...

I understand your dilemma, but re-engineering the machine is not the answer.Those exvs are stepper motors and unless the new exv has exactly the same steps then you are just asking for trouble.I have...

I would check the delta t across your evap to make sure you dont have an airflow problem that presents itself when the vav boxes shut down at night.Also check to see if it could be the freezestat.

I would check to see what the design tower water is. Usually it is 85 in 95 out.When it falls below 80 degrees the machine usually runs into problems.Also , what type of condenser water valve do you...

Like he said "check the strainer".Its plugged.While you are at it , check the flow switch for accuracy.Sounds like it might need adjusting.

I am looking to relocate from ohio to wisconsin and was wondering how the work is for the service fitters.I am a journeyman service fitter and work for one of the manufacturers .I have worked for...