Post a reply to the thread: Mcquay chiller help
You may choose an icon for your message from this list
Please enter the name by which you would like to log-in and be known on this site.
Please enter a password for your user account. Note that passwords are case-sensitive.
Please enter a valid email address for yourself.
Will turn www.example.com into [URL]http://www.example.com[/URL].
Make sure you have proper evap. water flow.
3 to 4 deg.control band,greater delta T higher control band, 0.5 pulldown rate,7to 10 deg.start up. 1to1.5 shutdown works pretty good.240sec interstage time.[time between stage's]
I did check the oil the way you described however I believe the oil prob has gone since the super heat has risen. Not sure about the control band. Any info is great. Trying to dial in this machine the best I can.
check oil with both compresser's off,when they run gas is pulled throuh oil equlizer line from lag compresser,and pulling oil into crankcase,try closeing ball valve on eq line that will show how much oil you have,then re open eq line.
I would try to get it to 16°. Have you checked the Control Band? That is huge when running an ALR chiller. Let me know if you need the formula.
Thanks for that info about the sh. It was only 6-10 degrees when I took over unit. Adjusted it up to 12-14 so I may need to go some more.
you may also want to check your superheat. The ALR like high superheat around 18 to 20°
So I found the manual and did some research and found that my prob may be coming from the output board relays. Cleaned the board and connectors. No alarms in 3 days.
McQuay has compressors 1 and 3 on one circuit, 2 and 4 on another. If you don't see oil at the compressors, first question is-where is it? I'd look for a leak first off. Which Microtech controller are you dealing with?
Mcquay chiller help Also posted this in aop. Not so sure which forum would have been best post. Thanks for any help. I am new to this sight and this is my first post although I have used you guys for help in the past. Anyways. I am working on a mcquay ALR130E. I keep getting an alarm of low oil/pwr on comp 4 and 3. Usually alternating and sometimes at the same time. Today circuit 1 is cutting off when comp 3 is activated. Little to no oil in sight glass on comp 1 and 3. Can't get oil to come back to compressors. Yesterday same prob on circuit 2 and circuit 1 was fine today circuit 2 is fine and 1 is acting up. Any suggestions or help would be great. Thanks Karl
Mcquay chiller help
Forum Rules
