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I have a Carrier Water cooled unit model 50RHRO24SCC30130. It was freezing
A bit on the bottom of the coil so I checked the suction and head pressure.It is a R-22 unit. The Coil is nice and clean...

Can anyone tell me if someone makes a 24 volt non-contact volt sensor?I think it would help to troubleshoot quicker if one was available.Thanks for any and all replies.

Thanks for the input.I really appreciate it.

Thanks for the input.I realize we will have to have a controller to control the new dampers for a decent mixed air temp.That being said, why wont the cold outside air come into the space thru the...

Thanks very much for the reply.I thought that it may be something similar to that,but that's why I thought I would ask.I wonder if I shut down the fan,would the outside air come(Just to prove that we...

We need to get some fresh outside air to a fan coil unit in the ceiling of a clinic.There is a 14 x 14 duct with no damper of any kind connected to an outside air duct(about 36 x 36) on the roof of...

I have a model SN12AT serial# 110653443 manitowoc countertop ice machine. The girls say that every once in a while it spurts out a little ice and water out the chute. Now today over the course of...

Thanks icemeister.
I am not clear on something.Is the toal heat of rejection the same figure as the BTU rating of the coil?Or is it figured some other way?Thanks again.

I am looking in my old Refrigeration and AirConditioning book(Goodheart/Wilcox) to see what the requirements are for a water cooled refrigeration system.(How much water/ton of refrigeration).We are...

My son is on a list for HVAC apprentice training.The union coordinator said he has to take a wonderlic test.My question is this a general IQ test or is it specific to HVAC work?He has a 2 year...

I am trying to find a countertop model cuber that would fit in a 18"x 18" spot.
It has to be a cuber.The Scotsman CS60 undercounter would work,but the manager of the department thinks the bin is a...

Can anybody give me any details regarding a Remcor Model
SID350W/35S 3701. Serial # 4378.We are not sure of the age of it and I am of the understanding the expected life of these units is about 10...

It seems to me that I read or learned somewhere that
air at 100 degrees has x # of BTU's and the same amount
of air has 80% of the amount of BTU's at 0 degrees.
Is this a true statement?Thanks...

Thanks for the input,but I guess what I am asking is will they work in conjuction with one another?(power vents and the ridge vent)I am not too worried about noise as they will be a fractional...

Can any one please tell me what they think about adding power vents in an attic that has a ridge vent?The building
(a large 3 story 75 unit) is 64 feet wide and over 500 feet long.The attic is...

I am looking to purchase some training videos.I would like some in airconditioning troubleshooting and repair and also refrigeration.Can anyone please suggest any from personal experience?Thanks.

I should of mentioned I checked the service valves.They are open.There isnt a expansion valve,it is a fixed orifice.Any other suggestions?

I have a problem that I cant figure.The suction line is in a vacuum as soon as the unit starts.I thought it must be low on refrigerant so I leak checked unit.Could not find anything,so I recovered...

Thanks for the reply.The reason we are thinking of going air cooled is to lower the sewage bills.They are incredibly high.

I have a York water cooled unit Model#C2E0060A25A.
Serial #NESM161843.We are considering replacing it with an air cooled unit.I have always believed this to be a 5 ton unit,but never researched it...

I would like to clean the condensing unit at my part-time job location.The condensing units are located inside the parking garage. The solution I looked at for condensor coil cleaning said not to use...

Thanks for the replies.You've been helpful.

I have a part time job at an apartment complex.The other day when I was changing filters on some units,I noticed that the condensate line off the a/c coil didnt have a trap
and the 3/4" plug off the...

After leak checking unit with an electronic tif detector and soap,I didnt find a leak.I opened up on the water controller valve and brought head pressure down to 175#.The suction pressure is at 47#...

Can someone please help me diagnose a carrier wastewater cooled heatpump.It locks out after running awhile and I dont want to mess it up any.I think someone else has been monkeying around,some of the...

Thanks for all the responses.As far as the test pressures,the tag says 250# is ok for the high and the low side.The evaporator coil is a sturdy looking thing,compared to to Koch units we have.Someone...

Thanks for the suggestions.After searching for more than 2 hours and doing a standing pressure test for 24,the unit lost less than 10#nitrogen.I started with 250# for a test pressure,according to the...

I have a Beverage Air reach-in unit model KR24-1AS.It has a leak somewhere.I tried a tif electronic sniffer,Pumped it to 250# nitrogen and tried some ultra-sonic ears,to see if I could hear it...

I got a walk in freezer that the dietary people are concerned about,they think it is not working so well,running a bit warmer than normal.Here are the facts:
bohn evaporator, water cooled...

Thanks for your reply.It didn't sound right to me it would be open book.Iappreciate it.

I was told that some places that administer the epa test are allowing it open book style.Can anyone tell me if this is true.My test was administrated by Ferris State University in conjunction with my...

Thanks for the replies.The p/t card I have does not list 409a so that is my problem.This is the only cooler we have with this refrigerant,I think.Thanks again all who helped.

I need to replace the Penn water control on a water cooled reach-in that is noisy,like a machine gun when it is controlling.The system is charged with 409A refrigerant.It is holding a pressure of...

I am looking for a part-time job to supplement my income.I work fulltime at a hospital as a maintenance engineer with flexible hours.I have lots of plumbing and electrical experience.I have EPA...

Thanks for the reply.I have a mammoth heat pump that I have to recover the charge and I didnt want to overfill the tank.It should all fit in.Thanks again.

I need to get clear on recovery tanks.Ours is stampedTW15.1
and 26.2 WC. How much is a full tank(80%)weigh? I am not sure to add the tare or subtract it from the WC.Thanks for the input.

We are in the process of installing a 3.5 ton carrier water cooled heat pump in a ceiling.The unit is just a bit over the drop ceiling.Went to finish hooking up the drain line from the pan, and...

Thanks to all who replied.I have been off for a few days and wanted to post the end result.It was definitely grossly overcharged.I pulled over 30 lbs. of refrigerant out of unit.Repaired the...

Thanks for the replies.There is only one fan and it is going the same direction as a similar unit next to it.I used the aresol cans of coil cleaner,called nu-brite.I would like to use the stuff in...

Thanks for the replies.I used 4 cans of coil cleaner and a small bottle of nitrogen to blow the coils clean. they were not too bad from what I could see.It only has a single row of tubes in...

I got a Trane condensing unit on a roof,model rauc-506-c.3 phase unit.Unit kicks out on hi pressure control.The condensor fan runs,suction pressure at 80psi head pressure goes over 400# then kicks...

In a previous post,cobitech suggested a method for charging units.This seems to be a great tip. I appreciate reading and learning things like that very much,as I am sure a lot of people are that use...

Got a reach-in in the shop down here in the basement.Ambient temp is 82 degrees suction pressure is any where from 10 to 5 psi, but seems to stay steady at 6 psi.head pressure is 160. Cabinet temp is...

Thanks for all the replies.I did make a mistake on the model number,it was an o rather than a d.I got the diagram and followed it,turns out it was a bad centrifugal switch over the auger motor that...

nothing listed for this machine on the website.Thanks anyways.

Got a few questions about a scotsman ice machine Model FD47DAE-1B.Serial#547025-12Y.The compressor dont run,The auger motor does.I tried to get a wiring diagram from the factory rep,he said he would...