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    Thank you for the info

    Thank you for the info
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    Wattmaster/ Aaon control question

    Hello everyone, I have a Aaon unit with a Wattmaster system manager control and was wondering what two control points were. One says SAT/Reset source and the second says Remote SAT reset. They have...
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    One leg of one of the relays isn't closing, so...

    One leg of one of the relays isn't closing, so when I switched it comp 1 closed, fan one closed comp 2 closed, and fan 2 is jumped out so even though it's on a bad leg it doesn't matter. The unit is...
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    A lot of questions for something I said was...

    A lot of questions for something I said was running.
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    http://postimg.org/image/uhgt6h78b/2dc74789/...

    http://postimg.org/image/uhgt6h78b/2dc74789/
    This is the air from outside.
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    So there are two relays and I pulled them out and...

    So there are two relays and I pulled them out and switched them. Both compressors fired up and since the fan is jumped out to both relays it kicked on also. That solved that problem till I can get...
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    Ok Y1 and Y2 are on a separate transformer from...

    Ok Y1 and Y2 are on a separate transformer from the indoor unit, it makes sense now.
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    Ok I tested the isolation relay and one side is...

    Ok I tested the isolation relay and one side is open for compressor 1. So in theory if I jump it out it should start. I still kinda want to know its function.
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    Probably should of posted these first

    Probably should of posted these first
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    http://s8.postimg.org/t7oqu1ps1/image.jpg...

    http://s8.postimg.org/t7oqu1ps1/image.jpg

    http://s8.postimg.org/pvc7c5cxt/image.jpg

    http://s8.postimg.org/o0zcuepxd/image.jpg
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    A shot in the dark is better than no shot I guess.

    A shot in the dark is better than no shot I guess.
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    Do not see a lockout relay and it's not in wiring...

    Do not see a lockout relay and it's not in wiring diagram.
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    Aaon unit 2nd stage not coming on

    I have an Aaon m#cc-b-022 2-a-2 with the 2nd stage not coming on. I checked 24v to contactor and I have no power. Checked HPS and LPS switches and both are closed.

    Checked wiring diagram and...
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    Ok I'm done. I put my two weeks in I just hate...

    Ok I'm done. I put my two weeks in I just hate when I can't figure something out.
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    Lol

    Lol
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    Ok so I opened the water line to condenser past...

    Ok so I opened the water line to condenser past water regulator no water coming out. It has springs on it.
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    Need help starting new post

    Ok so I work in a historic hotel I went tech school 10 years ago and have 3 years residential experience. I'm in a back of the house receiving area cooler because its close to loading dock. Walkin...
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    Ok so just to refresh. Copeland compressor with...

    Ok so just to refresh. Copeland compressor with receiver using r409a, water cooled, medium temp 35-40 system. Pressures are 25 on low 150 high, suction temp 73, liquid line temp 120. Water loop 66...
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    Loop temp is 60 degrees coming out is 111

    Loop temp is 60 degrees coming out is 111
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    Ok I'm heading to work now. So I'll get the...

    Ok I'm heading to work now. So I'll get the delta T of the water loop. But as we sit now does it look like there is a problem with the txv valve? Also to paint a better picture my boss is a coke...
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    Yes there is a receiver. Sorry guys went to tech...

    Yes there is a receiver. Sorry guys went to tech school 10 years ago. Had 3 years residential experience then got a DUI and started working at hotels. I'm rusty.
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    After the water cooled condenser

    After the water cooled condenser
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    At the compressor

    At the compressor
  24. Replies
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    30 superheat and 10 subcooling is that right

    30 superheat and 10 subcooling is that right
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    Sorry 150 high side is 104 degrees with a liquid...

    Sorry 150 high side is 104 degrees with a liquid line temp of 114 so 10 degrees subcooling
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    30. 150 high side equals 114 degrees with a...

    30. 150 high side equals 114 degrees with a liquid line temp of 114
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    Ok if the the pressure is at 25 for 409a it...

    Ok if the the pressure is at 25 for 409a it should be at 30 degrees. If the suction line temp is 60. That gives me a superheat of
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    Lol I put the sensing bulb in water so the txv...

    Lol I put the sensing bulb in water so the txv would open all the way.
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    Lol I put it in hot water to make sure it would...

    Lol I put it in hot water to make sure it would open all the way
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    I was hoping it was the txv so put it in hot...

    I was hoping it was the txv so put it in hot water to flush it. Lines going to the coil are 60 past is 63.
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    The loop line. Sight glass was clear and purple.

    The loop line. Sight glass was clear and purple.
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    Lol it's a medium temp walk in box 35 to 40...

    Lol it's a medium temp walk in box 35 to 40 range. 409 refrigerant 25 psi low 60 degree suction line. High side psi 150. Liquid line temp is 116 past water cooled coil it's 80. Opened lines to...
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    Thanks for being helpful as always.

    Thanks for being helpful as always.
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    Head pressure was 20 using 409

    Head pressure was 20 using 409
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    Yes

    Yes
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    Water cooled condenser 10 degrees off

    I'm working on a water cooled condenser. The sight glass says dry and the filter dryer is from 95. I felt condenser coil and it feels like its condensing. The pressures for 409a were 20 165. I...
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    Sorry the sight glass is purple I meant to say dry

    Sorry the sight glass is purple I meant to say dry
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    What does a wet sight glass mean

    What does a wet sight glass mean? I have a water cooled condenser for a walk in thats 10 degrees too high. They just replaced evap coil and there is oil around filter drier from 1995, which they...
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    Oh btw i added water to the bin and everything...

    Oh btw i added water to the bin and everything else ran ok. It's just not filling
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    Manitowoc not filling with water

    I have a problem with a manitowoc Sy0454a, it's not filling with water. I started a new job and found that they were trying to hook it up to 240 v. I ran it to 120, it started and made ice. Then...
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    Okay I think I figured it out. The wire is...

    Okay I think I figured it out. The wire is running into the door, so I'm guessing it keeps it warm so it doesn't stick.
    As far as why the temp was a little high the ambient temp was too much for...
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    Alright just wanted to make sure it wasn't just...

    Alright just wanted to make sure it wasn't just me. The thing is already as far clockwise as it can go, I tried the other way and all it seems to do is make the temp go up.

    Thanks guys.
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    Walk in running a little high

    Hey guys. I just got promoted to hvac/r guy at the hotel I work at (dollar raise that I was promised last year and more responsibility woo hoo). Anyway most of my experience is in residential so I...
  44. How much refrigerant can a recovery tank hold?

    I was recently asked by someone how much refrigerant can a recovery tank hold. I told them up to 80%. Then they said 80% of what. So.. that brings me here. I've looked for the answer myself and...
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    thanks for the info

    thanks for the info but that doesnt really answer the question of what the possible dangers are once it is rusting
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    I went to a customers house whos heat exchanger...

    I went to a customers house whos heat exchanger was rusting on a 20 year old furnace. I told her to replace due to possible carbon monoxide poisoning. She said she had detectors and asked weather...
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    I have 2 years experience in hvac as well as 1 yr...

    I have 2 years experience in hvac as well as 1 yr technical school.
    Type 1 & 2 epa certification
    Serviced, installed, and performed maintenance on gas furnaces, air handlers, condensers on my own. ...
  48. did the tech check the breaker size? Alot of...

    did the tech check the breaker size? Alot of times when companys replace condensers they dont check breaker size. In my experience at least the breaker is less than what it should be not by much...
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    its ok even though there not right next to each...

    its ok even though there not right next to each other it will still work

    [Edited by bgrich2003 on 08-09-2006 at 01:57 PM]
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    so whats the problem again? the condenser which...

    so whats the problem again? the condenser which operates at around 220, and is on a seperate breaker than the furnace is drawing high amps on second stage and instead of just tripping the breaker is...
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