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  1. Replies
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    when you are in the alarm mode and the code comes...

    when you are in the alarm mode and the code comes up, press the escape and enter keys at the same time and it will spell out what the alarm or alert is
    good luck with the scrolling marquee...
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    855

    Check out Astea.com

    Check out Astea.com
  3. Replies
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    855

    Our company uses Astea, we've been using it for...

    Our company uses Astea, we've been using it for several years now. Its not perfect, but it works pretty well. Does service tickets, payroll, billing,mileage, equipment lists, history etc. As a tech,...
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    766

    Looks like early 70's vintage-you may want to...

    Looks like early 70's vintage-you may want to check the expansion valve for capacity. Personally I haven't seen a Chrysler Airtemp in close to 30 years.
    Good luck
    Coolairman
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    Josh.: If you havn't found your UCPM software...

    Josh.:
    If you havn't found your UCPM software yet give Rich Hayner a call in the TCS Charleston office.
    Regards
    Coolairman
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    AAON problem

    We have an AAON split system heat pump air handler model # M1H011R2AA0A0:FTE101PA00000000
    s/n 200404-CFDC0007 230 v 3 ph with 5 hp exhaust and 7.5 hp supply fan with heat recovery wheel and hot gas...
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    5,483

    You may have some extra refrigerant stacked in...

    You may have some extra refrigerant stacked in your system, like Sicofthis said 24 degrees is a lot. If your fans, P66 control all checks out and your coil is clean, I would recover some of the...
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    1,803

    Thanks Balibe, I'll try that on the next one.

    Thanks Balibe, I'll try that on the next one.
  9. Replies
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    1,803

    These are on VAV boxes. It is set up on an Ivu...

    These are on VAV boxes. It is set up on an Ivu with bridges. When one of these fails, I have had 4 in the last 2 years or so, most or all of the controllers on that floor will not communicate, until...
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    1,803

    Carrier 33ZCFANTRM

    We are servicing a building with a hundred or so of these controllers. Every so often one will fail and crash the bus, and lose comm for the whole floor. Is there anything we can do besides replacing...
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    2,284

    A little more information on the application...

    A little more information on the application would be helpful, but on a comfort cooling application you can introduce the hot gas just downstream of the expansion valve, before the distribution...
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    2,111

    If you just in your first year. you should have a...

    If you just in your first year. you should have a mentor, with more experience, that you can talk over decisions with so you can benefit from their experience. Experience ia another name for...
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    1,378

    Need help with Liebert humidifier

    Does anyone have a wiring connection drawing for the infrared humidifier for an old Liebert FH199-A01. I have one with a dead short in the lamp circuit and the wiring has been changed from the...
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    YPAL problem

    I have a YPAL050CVC46BBCX. It has a tranducer package on 1 circuit only. The problem I'm seeing is the alarm led is lit and the pressures on the display are ???. Checked the transducers and got 3.5...
  15. Check the contactor, if the contacts are bad you...

    Check the contactor, if the contacts are bad you can get a current imbalance between phases in the compressor motor-causing overheating.
    Coolairman
  16. Replies
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    2,083

    Sounds like a classic restriction to me. You are...

    Sounds like a classic restriction to me. You are no doubt aware the metering device is in the ODU. When you pull the refrigerant out, you can put your pressure taps any where you want them.
    Good...
  17. Replies
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    13,457

    Sounds to me like the bearings are worn, main and...

    Sounds to me like the bearings are worn, main and or rod bearings. The excess clearance between the crankshaft and bearings wont allow oil pressure to stay up.

    Coolairman
  18. Replies
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    Stupid costs extra

    Stupid costs extra
  19. Replies
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    1,768

    I assume you are changing the outdoor unit to a 2...

    I assume you are changing the outdoor unit to a 2 compressor setup where you will be running at approx. 50% capacity most of the time. I would get the information off the valve and check it out with...
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    They are just trying to discourage the copper...

    They are just trying to discourage the copper thieves.
  21. Replies
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    Where is the cleanout?

    Where is the cleanout?
  22. Thread: High head

    by coolairman
    Replies
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    2,214

    Rheem units typically have a manual reset high...

    Rheem units typically have a manual reset high pressure safety-must have been bypassed.?
  23. Thread: Easy access

    by coolairman
    Replies
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    3,288

    Just because you can doesn't mean you should.

    Just because you can doesn't mean you should.
  24. Replies
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    3,690

    Coolairman

    Contactor coils typically burn up from a chattering condition, caused by lower than normal control voltage from having the wrong primary tap or a high resisistance short in the control wiring-not bad...
  25. Replies
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    1,566

    Coolairman

    You didn't mention if anyone worked on it before you got there.
    It sounds like you have a restriction in the filter drier or metering device.
    Sometimes inexperienced "techs" will add refrigerant...
  26. Replies
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    3,467

    Dont forget to check the hot gas bypass valve. If...

    Dont forget to check the hot gas bypass valve. If it is adjusted wrong your superheat will be high and your capacity will be reduced.

    Coolairman
  27. Thread: gasleak

    by coolairman
    Replies
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    3,611

    Dutch you work on some really cool hardware. I...

    Dutch you work on some really cool hardware.

    I have worked on a couple of Kraus chillers, very high quality.

    Regards

    Coolairman
  28. Replies
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    Doug is right. I did the same thing in one of...

    Doug is right.

    I did the same thing in one of my buildings.

    I'm hoping the new tax incentive will push the building owner to purchas a new control system.

    Coolairman
  29. Replies
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    Nisong: Sometimes if you are running an air...

    Nisong:

    Sometimes if you are running an air cooled package chiller, or any refrigeration system really, in ambient conditions below 20 F and the capillary tube on the low pressure safety switch is...
  30. Replies
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    I didn't see any mention of worn or pitted...

    I didn't see any mention of worn or pitted contacts on contactor or starter.

    my 2cents.

    Coolairman
  31. Replies
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    What I do when I suspect a scroll is running...

    What I do when I suspect a scroll is running backwards is check the current. It will be about 1/3 of rated load current while running backward.

    Coolairman
  32. Replies
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    The r terminals on your sub base are for the line...

    The r terminals on your sub base are for the line side of your transformer's secondary. The rc terminal is for your cooling transformer and the rh term is for heat. These are seperated electrically...
  33. Thread: DASHPOT

    by coolairman
    Replies
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    1,693

    Many years ago, when I was an apprentice, some of...

    Many years ago, when I was an apprentice, some of the compressors 30 to 80 ton recips that I ran into had autotransformer or part winding start, starter gear on them.
    The dashpot acted as a time...
  34. Replies
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    Put in a tee at the bottom of the riser with a...

    Put in a tee at the bottom of the riser with a threaded plug so debris can be cleaned out of the trap assy.

    Coolairman
  35. Replies
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    There are a lot of good suggestions above....

    There are a lot of good suggestions above.
    Please allow me to add my 2 cents woth.

    As a long time hvac service guy I believe in the kiss principle-keep it simple ...

    Have a professional...
  36. Replies
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    It's pretty typical for the company to purchase...

    It's pretty typical for the company to purchase the big ticket items and techs to purchase hand tools. Our company replaces worn or broken tools at the discretion of the first line supervisor.
    I add...
  37. Replies
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    Dowadudda: Tell your customer that the direct...

    Dowadudda:
    Tell your customer that the direct fired heater is 100% efficient that is, there are no stack losses, every single btu goes into the make-up air stream.
    The only way he can save money...
  38. Replies
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    Millerbug 42: With all due respect, you do not...

    Millerbug 42:

    With all due respect, you do not need an oil seperator on an R-22 air conditioning system if iit is piped correctly, i.e. proper sizing, oil traps at bottom of risers, dual risers...
  39. Replies
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    1,705

    Joe: When you change from a water cooled...

    Joe:

    When you change from a water cooled condenser you have to be very careful about line sizing. It sounds like the condenser is above the compressor. All compressors pump some oil so you have to...
  40. Thread: UV lights

    by coolairman
    Replies
    7
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    1,145

    Be careful if there is a plastic condensate drain...

    Be careful if there is a plastic condensate drain pan, the UV will behave just like sunlight and make the plastic brittle.

    Coolairman
  41. Replies
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    Gentlemen: You may find this website...

    Gentlemen:
    You may find this website useful-www.climatequest.com.

    They list degree day information, economizer hours info and lots of other good data pertinant to economizer usage.

    Regards
    ...
  42. Replies
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    68,863

    If you are freezing a coil on a direct expansion...

    If you are freezing a coil on a direct expansion air conditioning system, the more likely culprit is a lack of air flow.
    When there is not enough volume (cfm) across the evaporator coil there is...
  43. From a service and maintenance point of view it...

    From a service and maintenance point of view it is always better to install your equipment on the roof.
    When equipment is installed where it is difficult to get to i.e. above a suspended ceiling,...
  44. Thread: Dunham-Bush

    by coolairman
    Replies
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    8,758

    Back in the early 70's I took care of a building...

    Back in the early 70's I took care of a building with a 15 ton Dunham Bush air cooled chiller. Had compressor failures each spring. Found out the dumbass installers put the receiver in backwards with...
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    1,635

    I purchase tinted safety glasses from the local...

    I purchase tinted safety glasses from the local welding supplier. They look just like sunglasses. They are good for soldering or silver brazing in close quarters. You can even use them for driving.
    ...
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    1,951

    Lennox has always claimed to be cheaper by the...

    Lennox has always claimed to be cheaper by the pound.
  47. Replies
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    3,516

    Mike4hvac: It's difficult to know from the...

    Mike4hvac:

    It's difficult to know from the information you provided, but I would look at the mixed air control. It could be this is defective and telling the economizer control the mixed air temp...
  48. Replies
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    4,503

    A couple of years ago I had a ten ton split...

    A couple of years ago I had a ten ton split system Carrier heat pump that would lock out intermittantly. I went through all the drills to find out which switch was opening and when. What we...
  49. Replies
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    4,503

    Plain spoken is right on the money. ...

    Plain spoken is right on the money.

    Aprophet-the tattle tale will work if you jumper the normally closed contact on the CLO or bypass it altogether. Your safeties will still work it just won't...
  50. Replies
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    The last time I checked, we get paid to diagnose,...

    The last time I checked, we get paid to diagnose, and replace if defective, (rare but it does happen) the compressor lockout i.e. CLO controls. They are there to protect the compressor. It would be...
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