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Thanks fellas

Any good books out there to read up on pneumatic controls?

Added my email. Thanks

Ill be back Monday to check it out more

Not hooked to any controls just a regular trane t stat. Rundawg true to email you but wouldn't send I used the address in your profile

got a trane rtu model number YCD300B4LAFB S-P1101793D looking for install manual. Issue im having is unit heats fine but economizer is opening damper for oa instead of return. Thanks fellas

Found belt broken causing y2 to call and bring on mechanical. Thinking about adding an outdoor lockout to stop mechanical cooling from coming on as the compressor were a huge block if ice

Customer is getting to hot so it is trying to economize, but he says mechanical cooling is coming on

Have a store call that said there RTU unit is bringing on Mechanical Cooling. Im in North Dakota where it is 8* this morning. Its about 60 miles away so Im just trying to get any information I can as...

Ive done them the way Gravity is speaking off it will work, but leave a wiring diagram for the next pour soul!http://www.grainger.com/Grainger/RIB-Enclosed-Pre-Wired-Relay-5LE35

i would not put the steel wool in for one is probably not recommended by the manufacture and its probably not going to make the p.s.

I cleaned the condensor with co2. This system has been here for a couple years with no changes. And me and another guy take care of this contract so i can rule out anyone else tampering with it. I...

alright you think low on that high of head though? not questioning you just wondering if there is a explanation behind it

alright will do thanks ill report back tomorrow and ill take a picture to show you the setup

It has a txv reciever and compressor and honestly thats about it

This set up is straight from the factory can tell by the insualtion on the txv. And not sure on box temp really isnt one. Its just a salad bar top they set plates on and the top gets frosted. No...

What kind of superheat would be normal on this type of setup?And also they have the liquid line tied to the suction line purpose of this?

No sightglass.But if my charge was low i wouldnt think that high of suction?

Ok guys here what I got its a salad top cooler. It has an evap with no fans its encased in the metal and just gets frost on top. Issue is top is not frosting. Put my gauges on i have 51 suction 300...

Thanks for the ideas guys ill post back on Friday when I go there.

High side was 150 had 7 degrees subcooling. Didnt not change drier know i should have. Blew through with nitrogen but didnt noticed like it cleared a restriction or anything.

Bare with me as im new to these multi zones. But by that do you mean when you turn on one evaporator that the refrigerant could be going to the wrong evaporator?

Working on a continental reach in cooler today. R-134A got there today found suction pressure at 16 no high side tap. Unit wouldnt pull below 45. So decided to recover charge and put high side tap in...

Hey guys they handed me a no cool on a multi zone 3 evaporator mini split today. Brand new install someone else installed i havent been out to check it out yet. Not real familiar with mini splits but...

Whats the point of the trap on the evaporator, its on the positive side of the blower. Around this area they are never trapped on the positive side.