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  1. Replies
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    Whenever the building was rebuilt (I don't know...

    Whenever the building was rebuilt (I don't know how long ago - guessing 5-10 years ago), they never put the refrigeration back in it. The insulation hasn't been abused yet.

    Would an epoxy seal on...
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    Like I said, this is a "rebuilt" building. I...

    Like I said, this is a "rebuilt" building. I believe it was taken out by a tornado quite a while ago. Based on the parts they have laying around, I would guess it had a 2DL3 7.5hp compressors on each...
  3. Replies
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    I had given thought to the fiberglass but hadn't...

    I had given thought to the fiberglass but hadn't went down that road yet. I was going to pull back a piece of metal inside and out to actually inspect. I would think - regardless of insulation - the...
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    Cooler load calc?

    I have a friend who has a building that was (supposedly) rebuilt to be a cooler, but has not equipment.

    This is a framed building 40' x 48' with 10'6" inside height. Pole barn metal inside. Pole...
  5. Replies
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    463

    TXV Freeze up?

    If there is moisture in the refrigeration circuit, does the evap saturation have to be at or near freezing in order for the moisture to freeze?

    I'm fighting a unit that is locking out on low...
  6. Replies
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    I've learned that lesson.....

    I've learned that lesson.....
  7. Replies
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    1,135

    I will wait for more of a load, but I can verify...

    I will wait for more of a load, but I can verify with the Testo 420 if needed. I am on the middle tap of the X13.
  8. Replies
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    Bulb is at 2 oclock on a horizontal section just...

    Bulb is at 2 oclock on a horizontal section just outside the coil. I HATE having the bulb outside the case - I think it just looks tacky.

    It is well insulated.
  9. Replies
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    I've wondered that as well. 15psi swing on the...

    I've wondered that as well. 15psi swing on the high side seems excessive. I am going to wait until I have more of a load and re-check.
  10. Replies
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    I've thought about this. It certainly does not...

    I've thought about this. It certainly does not sound like a full stream of liquid at the TXV.

    I'll probably wait for warmer temperatures before taking it any further.
  11. Replies
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    1,135

    I did replace the furnace. TESP is 0.37 iwc.in...

    I did replace the furnace. TESP is 0.37 iwc.in cooling. By the chart, it is moving approximately 910 cfm
  12. Replies
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    1,135

    There may be a little. The house was cool...

    There may be a little. The house was cool anyways. The unit is in a basement and they had a couple returns pulling basement air, I think adding to the problem.
  13. Replies
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    It is a TXV. Outside temp was 76-77. House was...

    It is a TXV. Outside temp was 76-77. House was cool - about 68 at the stat. Return air was about 64.

    Superheat was between 13.3 and 15.1.

    I agree that 10oz maybe even a pound of refrigerant...
  14. Replies
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    New unit with non condensibles in it?

    Hello,

    I installed a new system and it just doesn't seem right to me.

    AC - RA1430AJ1NB
    Coil - RCF3621HTAMCA

    Completely new - new lineset. Brazed with nitrogen purge. Triple evac. Pulled 207...
  15. Replies
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    1,343

    I will give them that. They did a nice job at it.

    I will give them that. They did a nice job at it.
  16. Replies
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    1,343

    Use it anyways!

    It lasted 25 years... probably more than the one I just put in...
  17. I appreciate all the ideas. I returned today to...

    I appreciate all the ideas. I returned today to remove the system. I am going to bet that it ran long enough with low charge to suck in non-condensables. I recovered about a half pound of...
  18. High discharge temp with low everything else

    1994 Lennox 3 ton R22 heat pump system although it has never been used in heat mode.
    (Reversing valve, outdoor TXV and in line check valves)

    Arrived to a severly swelled cap. Replace it and unit...
  19. Replies
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    I quickly went through the thread and I dont...

    I quickly went through the thread and I dont believe it has been mentioned that the 24VAC is actually about 34VDC at the peak voltage so a 24VDC supply may not be enough
  20. Replies
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    437

    Are all squirrel cages the same?

    I understand there are different sizes, but is there any considerable difference in pitch or blade length?

    Is a 10x10 the same across the board with the exception of a convex or concave hub?
  21. Replies
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    It is a little rusty at the bottom, but other...

    It is a little rusty at the bottom, but other than that I see no mechanical damage.

    I also checked it with the stratus sniffer. It wasn't as excited as the H10 on low, but it went off as well.
  22. Replies
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    987

    Thanks. No CPR. H10 goes off like crazy inside...

    Thanks. No CPR. H10 goes off like crazy inside the chest...
  23. Replies
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    987

    Ice cream cabinet evaporator

    Hello,

    I had someone ask me to look at an ice cream cabinet, which I have never done before.

    It is an older MasterBilt.

    Unit is low on charge and the evaporator is the cause. I know the...
  24. Replies
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    Drier is just after the receiver. Half of the...

    Drier is just after the receiver.

    Half of the liquid line is new (whole line isn't but 8 feet)

    The condensing unit and driers are brand new. I will check for temp drops this morning to verify.
  25. Replies
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    1,032

    Yes. The glass doors rarely get opened. The...

    Yes. The glass doors rarely get opened.

    The walk in door has some wear, but not horrible.

    The unit hasn't had a capacity issue.

    I believe I am looking at a TXV issue. My return gas is at...
  26. Replies
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    1,032

    It is not a high volume application - it is a...

    It is not a high volume application - it is a small shop.

    It may be undersized, but capacity hasn't been an issue before and it has worked at that rating since 1993.

    Old unit was 5150 btu @...
  27. Replies
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    6x8x7. 3 display doors 1 walk in door.

    6x8x7. 3 display doors 1 walk in door.
  28. Replies
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    When I had less charge my superheat was in the...

    When I had less charge my superheat was in the 30s.... that's why I pushed it to where it is now...
  29. Replies
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    Flower case retrofit problem

    Hello,

    I just converted a flower cooler to R448a from R22 and it isn't going as planned. I'm looking for some insight from someone who has done this.

    OLD Condensing Unit: Techumseh AK9446EC...
  30. Replies
    10
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    But it had a clean air filter...

    Furnace had a 40-70 rise on the nameplate and for some reason I was getting a 90 degree rise...

    TESP 1.5 iwc

    Of course the air filter is clean...

    819284
  31. Replies
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    Thank you. I don't think the bathrooms are that...

    Thank you. I don't think the bathrooms are that large, so I could possibly get by with a 4 head unit - 3 bedrooms and 1 kitchen/living/dining.
  32. Replies
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    Mini split install

    Let me start by saying I have never ventured into the mini-split world. I have a house that I have serviced for a few years asking me to put one in - or at least provide a price.

    The system that...
  33. Replies
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    To ground.

    To ground.
  34. Replies
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    I assume you mean the discharge tubing and liquid...

    I assume you mean the discharge tubing and liquid tubing and not to scrap the condenser?

    Or were you referring to the suction line?
  35. Replies
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    Reach-in burnout replacement

    Working on a nice True GDM-49F freezer. Cabinet is in great shape. Compressor, not so much.

    Embraco compressor.

    By changing the compressor, start components, liquid filter drier, adding a...
  36. I appreciate all of the replies. I have a...

    I appreciate all of the replies.

    I have a couple units 14 years old that I maintain. I see no immediate reason to replace them, but I know they are getting older and try to plan ahead. They have...
  37. Average old age for walk in hermetic compressor?

    How long do walk in cooler/freezer hermetic compressors last?

    I know it's life is the real decision... TXV problems... bad condensing fan motors, dirty condenser... all will certainly shorten...
  38. Are you sure? I've been trying to calculate that...

    Are you sure? I've been trying to calculate that and I am getting about 0.09iwc for 5.5 feet of 3.5x14.5 at 750cfm
  39. I wish I had this kind of room. The supply is...

    I wish I had this kind of room. The supply is just behind the studs. I'd have to slide panning between the studs and supply duct. Flex isn't an option.
  40. Electric strip air handler. No combustion air

    Electric strip air handler. No combustion air
  41. 2T airflow through single panned studs

    Have a unit to replace. At the top of the wall is a 14x20x1 air filter grill. It was never panned in so it is sort of just there. I'm sure this unit sucks in attic air, basement air through a chase,...
  42. Replies
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    I was on the call for another unit and they...

    I was on the call for another unit and they wanted me to check out their new purchase of the GDM-49F. They pointed out that the perimeter of the door was sweating. I put an amp clamp on the wire...
  43. Replies
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    At my first experience, I would have to agree...

    At my first experience, I would have to agree with this. It seems to be a very capable controller, but the menu system leaves a lot to be desired.
  44. Replies
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    Hello. I have not had to work on any True...

    Hello.

    I have not had to work on any True Freezers with the LAE temperature control until today.

    The problem is that the mullion and door heaters weren't working. They are powered through the...
  45. Replies
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    True GDM49F

    I have not had to work on any of the units with the LAE control until today.

    Mullion and door heaters weren't working. They are ran through AUX2 on the controller. I tried all the options for Oa2...
  46. Replies
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    964

    ok. I can't find my numbers right this minute,...

    ok. I can't find my numbers right this minute, but I went back and added an additional 23oz from where I left the unit.

    This gave me about 20f superheat at the compressor at set point. This also...
  47. Replies
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    964

    I've never done that. Run a defrost and set it...

    I've never done that. Run a defrost and set it with an amp clamp to RLA?
  48. Replies
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    It could have been kinked, but it had about 1/2"...

    It could have been kinked, but it had about 1/2" gash whenever I unkinked it...
  49. Replies
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    I'm sorry - I did not change the cap tube, just...

    I'm sorry - I did not change the cap tube, just the lines under the cabinet. I cut 2 inches off of the tube to inspect, but it was clear.
  50. Replies
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    I weighed in the nameplate 17oz and even ran it...

    I weighed in the nameplate 17oz and even ran it up to 27oz without getting anything close to a decent superheat.

    Same 5 cu in. drier.
    I did screw up in that I didn't have 3/16 for the liquid...
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