Search:

Type: Posts; User: slonergan82

Page 1 of 2 1 2

Search: Search took 0.00 seconds.

  1. Replies
    2
    Views
    473

    Complete Frustration

    Had a call today "Temps up in freezer". The freezer has an older evap with a history of blowing heaters. Found the evap frozen right through to the fans. Spent a few hours to clear all the ice with...
  2. Replies
    44
    Views
    3,343

    The condenser is dumping cold liquid into the...

    The condenser is dumping cold liquid into the receiver, while the ORD dumps in hot gas to push out liquid and flood the condenser. The ORD needs to constantly feed because the cold liquid is...
  3. Replies
    44
    Views
    3,343

    No these systems are fully charged, clear...

    No these systems are fully charged, clear sightglass at all times. Thats what raised my original question. I eliminated all the obvious problems that would cause it to feed and all I can come up with...
  4. Replies
    44
    Views
    3,343

    Yes in theory that is exactly how it works, but I...

    Yes in theory that is exactly how it works, but I dont know if there is actually much modulation in the ord at very cold ambients I think it is pretty much open all the time. Im in Ontario and have...
  5. Replies
    44
    Views
    3,343

    head pressure

    My question is regarding the sporlan ori/ord valves in the winter. On the very cold days (-20 degrees C) Is it normal for the ord to be bypassing all the time or just periodically. I thought that it...
  6. Replies
    4
    Views
    507

    thanks. How can I contact the administrator? I...

    thanks. How can I contact the administrator? I dont see anything on this site.
  7. Replies
    28
    Views
    7,323

    I dont think that "COOLER THAN NORMAL" Really...

    I dont think that "COOLER THAN NORMAL" Really means cold. For example a 404 system running without noncondensables say at 100 degrees sct (235psi) and an ambient of 80 degrees the liquid line may be...
  8. Replies
    4
    Views
    507

    name change

    Is there any way to change your username on this site or delete treads that you posted?
    Thanks
  9. Replies
    14
    Views
    1,078

    Thanks Jp. I guess what my original question all...

    Thanks Jp. I guess what my original question all comes down to is
    Do you get a more constant control of superheat using a balanced port txv with systems using fan cycling? Everything I read says...
  10. Replies
    14
    Views
    1,078

    Thanks for the info on this topic guys. Ive just...

    Thanks for the info on this topic guys. Ive just always been told that a balanced port txv should be used anytime you have fan cycling. I assumed that this was the reason.
  11. Replies
    14
    Views
    1,078

    404 in winter running at 190 psi up to say 250/...

    404 in winter running at 190 psi up to say 250/ 260 psi in the summer is very possible
  12. Replies
    14
    Views
    1,078

    Balanced-Ported valves With a conventional...

    Balanced-Ported valves

    With a conventional TXV, the pressure differential across the valve results in a force that tends to “open” the valve. As operating conditions vary, this pressure...
  13. Replies
    14
    Views
    1,078

    I dont believe the change will be drastic but...

    I dont believe the change will be drastic but there will be a change. In the spring and fall when utilizing fan cycling I think these valves would start to hunt due to the fluctuation in head. Hence...
  14. Replies
    14
    Views
    1,078

    Conventional txv

    If I have a conventional txv in a system with fan cycling and head pressure control and I set the superheat at say 10 degrees when ambient is low (Winter) would I see a drop in superheat when the...
  15. Replies
    6
    Views
    594

    The trenton thermsaver is a two pipe hot gas...

    The trenton thermsaver is a two pipe hot gas system. The diagram you have is correct. These Trentons have been converted to a three pipe system though so there will be no heat exchange because the...
  16. Replies
    6
    Views
    594

    There is little superheat if any at all. I dont...

    There is little superheat if any at all. I dont understand how you can even get much superheat in defrost anyways. Your dumping hot gas into the evap which will condense and come back. this is the...
  17. Replies
    6
    Views
    594

    Just the cpr, Return gas is at saturation, normal...

    Just the cpr, Return gas is at saturation, normal for hot gas defrost
  18. Replies
    6
    Views
    594

    CPR vibration

    I have 4 Trenton hot gas defrost condensing units on a roof. On occasion I have herd and even felt the cpr valve rumble like crazy about mid way through a defrost. Now this doesnt happen every...
  19. Thread: evacuation

    by slonergan82
    Replies
    15
    Views
    1,573

    evacuated an ori/ord system today and it doesnt...

    evacuated an ori/ord system today and it doesnt pull through. So ya suction discharge and liquid line it is. Thanks all
  20. Thread: evacuation

    by slonergan82
    Replies
    15
    Views
    1,573

    An ori and ord combo works the same as a...

    An ori and ord combo works the same as a headmaster so I would think you would just pull through the ord. Therefor still pulling the condenser.
  21. Thread: evacuation

    by slonergan82
    Replies
    15
    Views
    1,573

    Actually tested this out today with a headmaster...

    Actually tested this out today with a headmaster control and it does pull through the bypass portion of the valve which evacuates discharge line and condenser.
  22. Thread: evacuation

    by slonergan82
    Replies
    15
    Views
    1,573

    evacuation

    If you pull from the king valve and suction service valve on a system that has a ori/ord or headmaster, are you still pulling from the condenser and discharge line? I thought it did. am I wrong?
    ...
  23. Replies
    4
    Views
    837

    Yes I agree. I forgot to mention that these...

    Yes I agree. I forgot to mention that these systems do have hot gas defrost.
  24. Replies
    4
    Views
    941

    The pressure drop occurs before it even enters...

    The pressure drop occurs before it even enters the evap. There souldnt be hardly any drop at all. The line is undersized. And I did contact Keeprite.
  25. Replies
    4
    Views
    941

    I added some access fittings and found there is...

    I added some access fittings and found there is about 65 psi pressure drop in the hot gas line. There is no way we are feeding enough gas to the evap. Im just waiting for the go ahed and I will...
  26. Replies
    4
    Views
    837

    head pressure control

    Just wondering how you guys are setting up your fan cycling controls in addition to head pressure controls (ORI and ORD) This time of year I seem to find alot of systems that are set up so they...
  27. Replies
    4
    Views
    941

    Trenton Thermosaver

    Has anyone here done much work on Trentons Thermosaver units?
    They are a two pipe hot gas defrost system that is apparently known for smashing compressors. The following links explain the...
  28. Replies
    12
    Views
    1,347

    5/8 line feeding two 5/8 lines doesnt seem right....

    5/8 line feeding two 5/8 lines doesnt seem right. You should always have a larger line feeding a tee no?
  29. Replies
    12
    Views
    1,347

    undersized liquid line

    I was working on a 10 ton high temp potato cooler the other day. The liquid line is 5/8 for about 8 feet and tees off to 2 evaps with 5/8 line aswell, each at about 8 feet. The gas is 404 (request of...
  30. Replies
    18
    Views
    2,933

    what superheat are you setting to at the...

    what superheat are you setting to at the compressor if the cap tube is run with the suction (freezer)?
  31. Replies
    18
    Views
    2,933

    When I had set the superheats I set them at the...

    When I had set the superheats I set them at the evap because when I originally charged the first system I set superheat at the compressor (20 degrees). It was way overcharged. The cap tube is...
  32. Replies
    18
    Views
    2,933

    subcooling and superheat

    I have just recently worked on a number of small two door reach in coolers and freezers from 2000 - 4500 btuh Mostly cap tube units. When charging these critical charge systems (no charge weight...
  33. Replies
    1
    Views
    462

    industrial ice machine

    I picked up an old industrial ice maker for next to nothing. I dont have much experience with ice machines and I am not familiar with the many manufactures of them. This machine is missing all kinds...
  34. Replies
    2
    Views
    531

    no access fittings

    Hello Im just looking for some advice on a quick diagnosis of a system by feeling the pipes. What do you expect to feel in terms of temperatures of an overcharged and undercharged system. Txv and cap...
  35. Replies
    17
    Views
    1,174

    Is the compressor over sized? If the lines are...

    Is the compressor over sized? If the lines are sized right and sloped properly It sounds like the compressor is too large = lower suction = low velosity = no oil return.
  36. Replies
    6
    Views
    483

    ya I had him put a bucket under the t&p valve...

    ya I had him put a bucket under the t&p valve incase it goes. I want to see if it is bleeding by because the presssure was about 30 when I arrived. I let some water out and lowered it to 12. I will...
  37. Replies
    6
    Views
    483

    I am a licenced gas tech and refrigeration...

    I am a licenced gas tech and refrigeration mechanic. I just dont have much experience with hydronic heating. Any help would be great.
  38. Replies
    6
    Views
    483

    boiler pressure

    What is the proper way to set a boiler water pressure regulator. I thought you set it at 12 - 15 when the boiler is cold and the pump isnt on. Is this correct? My father has a boiler and right now I...
  39. Replies
    14
    Views
    1,535

    R12 replacements

    Just want some opinions on what is the best replacement for R12 medium temp aplication? Ive been using 409a .
  40. Replies
    4
    Views
    865

    Hussmann Rack

    Just have a general question about what you would expect to see if you changed a freezer to a cooler by adjusting the EPRs up but didnt change the tx valve heads. I believe You would end up starving...
  41. Replies
    13
    Views
    5,730

    what do you mean by testing the float? If I...

    what do you mean by testing the float? If I pushed it down the water valve would open.
  42. Replies
    13
    Views
    5,730

    The water valve is not leaking by I took the hose...

    The water valve is not leaking by I took the hose off it when it was deenergized and there was nothing. There is a harvest button and when I pushed it it did go into harvest but it will not go into...
  43. Replies
    13
    Views
    5,730

    Scotsman ice machine

    I was called in to look at a Scotsman ice machine Mod # SCE275A-1G
    Ser # 05091320010479. The Unit was unplugged when I arrived. Started the unit up and it would run for a long time and build up...
  44. Replies
    11
    Views
    1,824

    High side restriction = low suction and low head...

    High side restriction = low suction and low head pressure because you are not
    feeding enough liquid to the evap. Head pressure is directly related to the load on the evap. No liquid = no load
  45. Replies
    11
    Views
    13,561

    minimum circuit ampacity

    I know that you can only load a wire 80 %. For example #14 wire @ 12 amps
    Does the minimum circuit ampacity take into account the 80 %

    Can you use a #14 for a mca of 14.2?
  46. Replies
    7
    Views
    2,231

    Alco tx valves

    Where can I find Alco txv nomenclature charts I want to know what an
    AFA-1/4-MC is

    Thanks
  47. Replies
    13
    Views
    1,456

    would a high temp compressor be able to achive...

    would a high temp compressor be able to achive low temperatures?
  48. Replies
    13
    Views
    1,456

    If it where an actual high temp comp used in a...

    If it where an actual high temp comp used in a low temp senerio what would you expect to see (figures)?

    If I have to go back I will pull the gas and use 409a
  49. Replies
    13
    Views
    1,456

    feel like an a$$

    Had a call today for a new customer that had purchased a 2 door reach in freezer on line for real cheap. The seller was a guy that my company sells some equipment to every now and again. He is Known...
  50. Replies
    18
    Views
    1,445

    well said There is no need for smart a$$...

    well said

    There is no need for smart a$$ remarks everyone must start somewhere
Results 1 to 50 of 83
Page 1 of 2 1 2
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event