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  1. If you had to remove refrigerant to get the...

    If you had to remove refrigerant to get the pressures normal, you still have a problem. Did you ever check rotation of the condenser fans. You should also check the placement of the fan blades, they...
  2. Replies
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    14,940

    I know that replacement compressors for Trane...

    I know that replacement compressors for Trane Intellipak's state that the warranty will be violated if a phase rotation meter is not used. They give you the proper phasing. I know a couple of guys...
  3. Replies
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    3,441

    Quote Originally Posted by Service93 View Post...

    Quote Originally Posted by Service93 View Post
    I agree that airflow would make sense. Although I removed the blower door and filter to allow more air across and pressures did not change.

    When...
  4. Replies
    100
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    3,441

    With low SH, there is no restriction. Has to be...

    With low SH, there is no restriction. Has to be air flow, make sure the blower is turning the correct direction. See if anyone else has worked on this unit. Try removing the access door on the supply...
  5. Replies
    7
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    451

    Found the adapter I needed at Johnstone Supply....

    Found the adapter I needed at Johnstone Supply. The system has a leak somewhere, but it's cooling good for now.
  6. Replies
    7
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    451

    I'll probably just look for the adapter and use...

    I'll probably just look for the adapter and use the drum I have.
  7. Replies
    7
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    451

    Charging Auto A/C

    Okay, I need some advice. I need to check and most likely add some R-134a to a car A/C. I don't have hoses that fit the auto access fittings and was thinking about just getting a can of refrigerant...
  8. Thread: Leak Detection

    by hands
    Replies
    16
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    796

    I have had H10's that would go off in the middle...

    I have had H10's that would go off in the middle of my yard with no refrigerant around within 500 yards. But you pick up leaks with a electronic leak detector and not have bubbles when using liquid...
  9. Replies
    8
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    398

    I had a similar problem with a Carrier RTU. I cut...

    I had a similar problem with a Carrier RTU. I cut the liquid and suction lines at the evaporator. I made a couple of copper pipes the same size as the suction and liquid lines with access firings on...
  10. Replies
    11
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    1,090

    I haven't tried it, but how about a flare...

    I haven't tried it, but how about a flare coupling to join the aluminum and copper.
  11. Replies
    12
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    774

    When I had a bunch of small accounts, I would tie...

    When I had a bunch of small accounts, I would tie two boxes to a rope and pull them up. Until I had all of them on the roof. That was before Filter Grabbers were out. Now I use a scissor lift that is...
  12. Replies
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    595

    9* subcooling and flash gas, looks like it might...

    9* subcooling and flash gas, looks like it might be a little low on charge. What is the superheat?
  13. Replies
    17
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    612

    Did you do the repair on the problem circuit? You...

    Did you do the repair on the problem circuit? You said that you added refrigerant, then you said that you didn't because the pressures didn't change. Were you using a scale to see if it was actually...
  14. I thought that's where you put the oil in.😄

    I thought that's where you put the oil in.😄
  15. Thread: The Double Flare

    by hands
    Replies
    72
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    3,191

    Then you probably don't work with hard copper...

    Then you probably don't work with hard copper much. I have used the pre made flares many times when working with hard copper. They have always worked good for me.
  16. Replies
    36
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    1,788

    [QUOTE=TechmanTerry;22635741]With those little...

    [QUOTE=TechmanTerry;22635741]With those little push on the schrader acid test kit, I thought that the system has to be running when using one of them (QUOTE)

    Terry,
    You're right about using the...
  17. Replies
    36
    Views
    1,788

    I wouldn't trust them. I used some on a unit that...

    I wouldn't trust them. I used some on a unit that had a shorted compressor. There was no way to get an oil sample before removing the compressor, so I tried two of the cheep push on testers that have...
  18. Replies
    36
    Views
    1,788

    I like Sporlan acid test kits. What kind do you...

    I like Sporlan acid test kits. What kind do you usually use?
  19. Replies
    36
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    1,788

    Remove the moisture indicator, try to clean the...

    Remove the moisture indicator, try to clean the glass with a swab and install a new moisture indicator. But you should first leak check the system and fix the leak. Do an acid test and replace the...
  20. Keep in mind that if you install a speed control...

    Keep in mind that if you install a speed control like this, even if it has settings for sleeve and ball bearing motors, you might have problems with the motor overheating. I have installed several...
  21. If it's a new drum, it's okay to charge the...

    If it's a new drum, it's okay to charge the entire drum into the circuit, even if the last little bit is vapor.
  22. Replies
    13
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    1,402

    If you had a good vacuum, it is very easy to over...

    If you had a good vacuum, it is very easy to over charge a unit while it is not running. Why didn't you weigh in what you took out, or was it a new install. You could measure the lineset and figure...
  23. Thread: Liebert p66

    by hands
    Replies
    11
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    642

    With 407c, you might have a problem if you loose...

    With 407c, you might have a problem if you loose some of the charge. In this case, would recover the entire charge before replacing the P66.
  24. Thread: Liebert p66

    by hands
    Replies
    11
    Views
    642

    There should be, but I changed a dual circuit...

    There should be, but I changed a dual circuit P-66 and the cores were stuck open. I managed to get caps on the access fittings, gained my composure and installed the flare nuts. I had thick neoprene...
  25. Replies
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    1,874

    It's a M# YSC120F4RMA0ED. I didn't have time to...

    It's a M# YSC120F4RMA0ED. I didn't have time to really check it much, got rained out. But I changed the gas regulator about six weeks ago and adjusted the has pressure per the Data Plate. It didn't...
  26. Replies
    20
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    1,874

    Hey Tyler-Sloan, I was wondering if you found out...

    Hey Tyler-Sloan, I was wondering if you found out what caused the soot in the heat exchanger. I did the PM on a Trane RTU today that was installed last summer and the flue screen was covered with...
  27. Thread: Reznor heater

    by hands
    Replies
    38
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    2,013

    Standing pilot would not have a spark Ignitor and...

    Standing pilot would not have a spark Ignitor and would most likely have a thermocouple. Go back to the original parts.
  28. Replies
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    485

    So they are actually using TXV's for hot has...

    So they are actually using TXV's for hot has bypass valves. They should have used HGBP valves. The best place to dump the discharge gas is at the evaporator inlet after the TXV. If it goes to the...
  29. Replies
    6
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    485

    Sounds like one of the HGBP valves is going to...

    Sounds like one of the HGBP valves is going to the suction accumulator and both valves need to be adjusted. You didn't explain the piping configuration of the valves. Have you tried adjusting them...
  30. I have an account with around 100 Trane RTU's...

    I have an account with around 100 Trane RTU's with Tracer Summit controls. I never have a problem with test mode unless the customer has something disabled on the front end.
  31. I know that there was a problem with LCI-R boards...

    I know that there was a problem with LCI-R boards causing a IGN communication time out fault. I can't remember which version of LCI-R board it was, but I installed a RTU a little over a year ago that...
  32. Replies
    3
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    363

    Did you check out the compressor to see if there...

    Did you check out the compressor to see if there is a problem with it?
  33. Thread: 407c ??

    by hands
    Replies
    5
    Views
    582

    I have a customer that had several process...

    I have a customer that had several process chillers with remote condensers and used 407c refrigerant. The customer had me doing a monthly PM on them and I found several leaks in the circuits. The...
  34. Thread: Bad Gas Valve?

    by hands
    Replies
    8
    Views
    819

    Are you talking about the adjustment cap on the...

    Are you talking about the adjustment cap on the gas regular or the gas valve? If it's the gas valve, I have seen several times where the manifold gas pressure will change when the cap is put back on.
  35. Replies
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    921

    Every boiler system I have worked on has used a...

    Every boiler system I have worked on has used a water softener for the makeup water. The TDS will still get high, so the continues surface blow down and daily bottom blow downs will still need to be...
  36. Replies
    14
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    1,590

    I did notice that the gas regulator had a brass...

    I did notice that the gas regulator had a brass vent limiter. I plan on replacing it with one of the blue vent protectors. But I'm going to wait until it gets cold again to see if that is actually...
  37. Replies
    19
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    1,243

    You add a low ambient program on Tracer Summit to...

    You add a low ambient program on Tracer Summit to lock out mechanical cooling. I also think you can lower the supply air set point on Tracer.
  38. Thread: McQuay WSHP

    by hands
    Replies
    7
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    790

    So are you saying that the compressor never...

    So are you saying that the compressor never starts on its own? Are the HP switch wires terminated correctly?
  39. Replies
    14
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    1,590

    So far this week there has been no more problems....

    So far this week there has been no more problems. It has been in the low 40* to low 50*. I don't even know if it has been calling for heat. Maybe next week will bring so cold days.
  40. Replies
    14
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    1,590

    Thanks for the replies guys. I asked the customer...

    Thanks for the replies guys. I asked the customer to call me next time and reset it. I'm sure there is actually a problem because the space is cold when he has this fault. I was thinking it might be...
  41. Replies
    14
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    1,590

    Trane Flame Sensor

    I have had two calls on a Trane RTU, M #YSC120. The customer said it was not heating and had a fault, "Flame not sensed with a call for heat". Both times he reset it through Tracer. When I arrived,...
  42. Replies
    0
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    382

    Trane IGN1 COMM Fault

    I had a call that a Trane RTU, M# YHC092F4RHA0------ had a IGN1 COMM TIME OUT fault. The RTRM board was also indicating a heating fault, but the Ignition board did not show any faults. This unit has...
  43. Using a straight edge or laser does make good...

    Using a straight edge or laser does make good sense to me and they do work, even if the sheaves are not the same width, as long as you know what you are doing. But a straight edge is less expensive....
  44. I use a straight edge. If one sheave is wider,...

    I use a straight edge. If one sheave is wider, you measure them and split the difference. The straight edge will then hang over the narrower sheave this amount. I have been using this method for many...
  45. Replies
    18
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    1,690

    I had to replace one on a unit that was only...

    I had to replace one on a unit that was only about six months old. The motor comes with the wheel on it. It is very expensive and takes two people to change.
  46. Replies
    14
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    1,647

    I work on a lot of Trane RTU's and the burners...

    I work on a lot of Trane RTU's and the burners can light off very rough if the gas pressure is too high or too low. I would guess that it was set to a positive pressure. That being said, I was...
  47. Replies
    16
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    3,019

    My experience is removing the plug doesn't do...

    My experience is removing the plug doesn't do much. Years ago I had an account that I went to every day. The customer had a PM procedure that called for removing the relief plug and grease the motor...
  48. Replies
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    743

    I think they make a special bit for tile.

    I think they make a special bit for tile.
  49. Replies
    11
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    1,079

    It won't hurt to mix cores, but I would stick...

    It won't hurt to mix cores, but I would stick with the HH cores. A liquid line sight glass with moisture indicator would also be a good idea.
  50. Replies
    11
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    1,079

    What type of oil is in the system? If it is POE,...

    What type of oil is in the system? If it is POE, you should also change the compressor oil. If mineral, I would be more concerned about the acid because you will be able to boil out the moisture...
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