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Type: Posts; User: OhioTech

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  1. Replies
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    carrier i vu rtu open

    Hey guys, I have a customer with a carrier unit. I was told I needed the I VU software and cables to connect. Got it all. Followed info given. I am having connection issues. I am not that familiar...
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    Chipkin and automated logic

    Hey everyone, first off I am a mechanic and not a controls tech. I have a unit with a newer automated logic controller. Can I use Chipkin automation systems BACnet explorer to access this control. I...
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    484

    York simplicity software,laptop and connectors

    York simplicity software,laptop and connectors
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    632

    I guess maybe shutdown pump and check static....

    I guess maybe shutdown pump and check static. Then pressure X 2.3 ft per pound= rise.. Such as 50ft high= (21.7 lbs) --22lbs static.
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    Chiller and boiler.

    Chiller and boiler.
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    632

    Water/Pump pressure?

    What do you do to determine proper pump/water pressure on closed loops. If just checking/ inspection of system? Positive-Negative suction?
  7. Thread: JC ZJ12

    by OhioTech
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    466

    I was just about to answer when fixed it...

    I was just about to answer when fixed it yourself. You can also check airflow with magnahelic if issue continues. Compare to swith setting.
  8. turn on blower 24/7

    turn on blower 24/7
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    Is it set up as CV or VAV? It makes a difference.

    Is it set up as CV or VAV? It makes a difference.
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    369

    VERIABLE??????????????????????????????????????...

    VERIABLE?????????????????????????????????????? What?????? spell check....... Your question makes no sense.
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    What is the issue?What brand unit?

    What is the issue?What brand unit?
  12. Replies
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    reversing valve could be the problem but,...

    reversing valve could be the problem but, probably the compressor
  13. You tell the customer the the situation. Give...

    You tell the customer the the situation. Give them the option. You have contacted the dealer with no luck so far. I guarantee anything from BAC is usually twice as much money as anything you can get...
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    Check out this site for Trane info ...

    Check out this site for Trane info http://hvac.amickracing.com/RTU%20Training/Trane%20RTU%20info/
  15. I agree. Take it to your belimo dealer and toss...

    I agree. Take it to your belimo dealer and toss it on the counter. They will fix you up with linkage ,switches etc.
  16. Replies
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    Dupont M099. You loose capacity. If the unit is...

    Dupont M099. You loose capacity. If the unit is undersized,dont use it. Us on exv,txv system. Replace any rubber o rings.
  17. Replies
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    I just attended a Dupont refrigerant seminar. You...

    I just attended a Dupont refrigerant seminar. You can not mix. You can top off M099,a certain percent. I can't remember what percent (m099) off the top of my head.
  18. Thread: megged out

    by OhioTech
    Replies
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    1,486

    Meg IOL?

    Meg +250 good. Meg will show moisture of system and integrity of motor. If moisture on compressor body at terminals meg can read bad. IOL- amps? volts? load? head pressure? Connections?Contactor?
  19. Replies
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    http://www.gordonpiattparts.com/manuals.htm ...

    http://www.gordonpiattparts.com/manuals.htm Manuals on line CiCi boiler..Gordon Piatt parts rep. John Zink bought Gordon Piatt
  20. Varitrane VAV fan ON and OFF- Mechanic with control question

    Varitrane VAV box. Heating fan off and on. Electric heat air flow switch was not making. Replaced filter.Pulled and cleaned blower. Heat works now when fan is running, But, fan starts and stops...
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    Anyone plugged a tube on a fire tube boiler

    I have a fire tube boiler with one tube leaking. Boiler inspector noticed.The boilers are over 30 yrs old and are going to be replaced next year.I have a concern with plugging. If water enters the...
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    DONE!!!!!!!!!.Froze my A________ off! -3 deg 20...

    DONE!!!!!!!!!.Froze my A________ off! -3 deg 20 ft in air. LIVIN THE DREAM!Turbo torch to cut channels and holes in ice because pan was overflowing with ice up into the coil. Moved hose around...
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    Big Block of Ice

    Looking for ideas to thaw ice and replace a defective drain pan heater. Coil 20 ft in air. Pan a solid block of ice about 10ft long x 1ftwide x 6in deep . 0deg in room/warehouse. I need to get old...
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    Thanks for the info EngineerDave

    Thanks for the info EngineerDave
  25. Replies
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    2,748

    Thanks Eng Dave for info

    It looks as though the float on the seperator is hanging up and not allowing the oil to go to the oil receiver. Quoted customer new float assembly,henry oil level control for compressors and oil...
  26. Thread: P-66 or motor

    by OhioTech
    Replies
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    840

    All electric aside...make sure you are using a...

    All electric aside...make sure you are using a ball bearing motor. A sleave bearing will fail.
  27. Replies
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    Central Ohio

    Central Ohio
  28. Replies
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    I would say the suction line is 100-125ft...

    I would say the suction line is 100-125ft insulated untill it gets to the accumalator. Accumalator is a ball of ice.The compressor that has failed is thr first one after the accumalator. I will check...
  29. Replies
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    OK then 20-25 deg superheat at compressor. I am...

    OK then 20-25 deg superheat at compressor. I am confused at the 6 deg at the evaps than was recommended and then 20-25 at the compressor. I guess maybe I should check the total tonnage of the...
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    I am getting replies from all of you so fast I am...

    I am getting replies from all of you so fast I am falling behind on your replies. I noticed someone said 6 degrees of superheat on the evaps.
  31. Replies
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    No less than 20 degrees superheat? So like 10-15...

    No less than 20 degrees superheat? So like 10-15 Just want to make sure on the same page
  32. Replies
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    The condensers looked clean. It is mounted right...

    The condensers looked clean. It is mounted right above the "shack" the compressors are in. Some genius mounted them there so its like working on an airplane with the props running. I did notice that...
  33. Replies
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    The cannister I am talking about is on the side...

    The cannister I am talking about is on the side of each compressor. It has a sight glass and an adjustment to control the oil level. It mounts on the compressor where there is normally a sight glass....
  34. Replies
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    At compressor start up I always engage the new...

    At compressor start up I always engage the new contactors, when wiring not connected to the compressor. I allow the oil safety to time out. To confirm operation. I appreciate the help. I just have...
  35. Replies
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    I will replace the filters. Check safeties....

    I will replace the filters. Check safeties. Replace the henry oil level cannister. Replace compressor .Check superheat on each coil and at the compressors. I guess I will have to babysit the old...
  36. Replies
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    The solenoid does shut off. The defrost timer did...

    The solenoid does shut off. The defrost timer did shut off solenoid valve and pump down while I had just began checking the recent install. The compressor that had been changed, has been down for...
  37. Replies
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    I realize the compressor is done. I am asking...

    I realize the compressor is done. I am asking about the superheat so, I know I am ok while running. I want to be thorough. I also believe I should check superheat on each of the three evaporators. I...
  38. Replies
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    Not going to run it. Compressor one week old....

    Not going to run it. Compressor one week old. Going to have to replace. Just looking for info so we don't loose another.
  39. Replies
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    HVAC guy needing Comm ref Mech Help

    I am involved in a small frozen food warehouse. The unit is a Tyler has two copeland six cylinder compressors probably about 25 ton. Our companies mechanic that took care of this is no longer with...
  40. HVAC guy needs Ref Experts opinion.Tecumsah high amps at start.

    First thing refigeration guys I am 25yrs hvac not refrigeration so, I am asking for your expert advice. A building I take care of has a tennant that has lost two compressors in six year old unit.This...
  41. Replies
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    ABB ACH550 drive overcurrent fault

    I have a building with four Carrier 48AJ RTU's. I believe installed in 2005. They each have an ABB ACH550-UH 10 hp drive. There are nuisance trips of "overcurrent" on these units. Different...
  42. Thread: manometers

    by OhioTech
    Replies
    32
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    2,364

    Batteries never die on the u-tube

    Batteries never die on the u-tube
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    Is it an atmospheric (7-8%)or power burner...

    Is it an atmospheric (7-8%)or power burner (4.5-5%)?
  44. Replies
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    Did you put your meter across the coil to check...

    Did you put your meter across the coil to check voltage or one on contactor and to ground? Must have the 24v on coil..meter leads on each side.
  45. Recover refrigerant to EPA standards. Purge with...

    Recover refrigerant to EPA standards. Purge with nitrogen and remove valve cores.
  46. Replies
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    Sounds like unit that supplies air may be in a...

    Sounds like unit that supplies air may be in a supply fan bypass mode, if it has a vfd. Possible problem with controls that control static. If unit has vanes on supply fan,possibly open/broken.
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    VA-VoltsxAmps-put a meter on it

    VA-VoltsxAmps-put a meter on it
  48. Replies
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    Valves,internal relief

    Valves,internal relief
  49. How did you determine it was the Tstat. Did you...

    How did you determine it was the Tstat. Did you use a meter to see if Stat was calling for heat? Probably heat sequencer sticking.
  50. I did check some temps. It makes sense to me that...

    I did check some temps. It makes sense to me that the heads should be cooler in the unloaded position. I have inherated someone elses repair. The othe mechanic told customer the unloaders were not...
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