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Type: Posts; User: Bob-Brr

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  1. Replies
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    I can't tell you how many times I have opened a...

    I can't tell you how many times I have opened a clock and seen the X post empty, and the wire taped up in the back.
    The last one was an older True 2 door. After opening the evap, found both ...
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    509

    Take your super heat at the evaporator, saturated...

    Take your super heat at the evaporator, saturated suction line insulation will screw up your super heat as well. We all know the attention the word "Mold" brings to building occupants.
    They used...
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    509

    On freezers, I tie the liquid line to the suction...

    On freezers, I tie the liquid line to the suction line, wrap them both in foil tape and put them in the same jacket. This also improves system performance, the heat transfer between the 2 also...
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    Maybe he shocked himself?...:whistle:

    Maybe he shocked himself?...:whistle:
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    231

    Hey guy, I retired as a stationary engineer for...

    Hey guy, I retired as a stationary engineer for PSUC when Paterson gave the 2009 incentive. Anyway, freezers are wonderful devices, always take your time when dealing with any issues on them. To...
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    Since the Q series there has been a 3 minute...

    Since the Q series there has been a 3 minute harvest limit.
  7. On small systems, I NEVER put a service valve on...

    On small systems, I NEVER put a service valve on the high side (unless it has a solenoid). If you are in such a hurry to get a deep vacuum that a cap tube hampers your progress, you doing something...
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    40# low side at the start of the freeze cycle is...

    40# low side at the start of the freeze cycle is way too low under any circumstance, narrows it down quite a bit.
  9. Replies
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    591

    Worked on a few of these things, I know the...

    Worked on a few of these things, I know the Randell units use a pressure limiting valve for the rail.
    When a had to top off the charge on any of these systems I would shut off the rail until I got...
  10. Replies
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    591

    This unit, is it the one with 2 evaporators for...

    This unit, is it the one with 2 evaporators for the base?
    No doubt you are flooding somewhere, you should be able to shut off the rail, disconnect the fans for your base evaps and check the super...
  11. Replies
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    364

    I have a customer who had someone do this (less...

    I have a customer who had someone do this (less the resistor), He will love me if this works!
  12. R290 oil is not likely to be extremely...

    R290 oil is not likely to be extremely hygroscopic, in fact it my , in many cases be mineral oil. If the unit has been in service for a time, prior to it's first service call, I could second guess...
  13. Replies
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    With 290 I use a chef's scale, if done right, you...

    With 290 I use a chef's scale, if done right, you can get within a quarter ounce.
  14. Replies
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    921

    BULLSHIT! That would be a 290 charge. 1.6 ounces...

    BULLSHIT! That would be a 290 charge. 1.6 ounces on a134A, 1/3 hp system, you would have a deep vacuum on your suction gauge.
  15. Replies
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    921

    Cap tube with 134A charge 11-15 suction. Can't...

    Cap tube with 134A charge 11-15 suction. Can't use super-heat with cap tube system.
  16. Thread: Open TXV???

    by Bob-Brr
    Replies
    16
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    699

    It was a few years back, I don't recall the...

    It was a few years back, I don't recall the actual "brand" but, I had 2 with the same handle. When I called about a condenser replacement UR steered me right to Copeland. So, maybe it is partly...
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    The kitchens I worked in in Florida had...

    The kitchens I worked in in Florida had unconditioned MU air, a properly manufactured hood system is balanced and the airflow into the hood is directed to supplement only for the amount of exhaust...
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    You say this happens sometimes, these ovens are...

    You say this happens sometimes, these ovens are super sensitive to air flow entering the combustion area, the front panel needs to be in place correctly. The sense rods seldom go bad, however, you...
  19. Thread: Open TXV???

    by Bob-Brr
    Replies
    16
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    699

    I am really reluctant to sound like an...

    I am really reluctant to sound like an argumentative fella, but, I have had this happen on a Copeland rack. The incidences occurred in the middle of the night and the customer lost everything in the...
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    Be careful, that may be the third atom bomb they...

    Be careful, that may be the third atom bomb they didn't use! :grin2:
  21. Thread: Open TXV???

    by Bob-Brr
    Replies
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    699

    Because the issue comes and I goes, it really...

    Because the issue comes and I goes, it really sounds to me like the device is periodically sticking.
  22. Replies
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    664

    They probably didn't use a relay. so the board is...

    They probably didn't use a relay. so the board is handling full loads, hence the burnt board.
  23. Thread: Open TXV???

    by Bob-Brr
    Replies
    16
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    699

    Sounds to me like your headmaster is stuck and...

    Sounds to me like your headmaster is stuck and blowing hot gas into the liquid line.
  24. Replies
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    664

    No voltage going to heaters, but, 7 amps when he...

    No voltage going to heaters, but, 7 amps when he jumped out the control.
    Bad control board, some of those have controllers and a separate relay board, still, True charges a fortune for their junk.
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    Airflow is critical with all these prep tables,...

    Airflow is critical with all these prep tables, make sure that evap fan is working at full speed, I have seen several incidences where previous servicer and manufacturers accidentally installed 220v...
  26. What is your suction pressure?

    What is your suction pressure?
  27. Replies
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    If the frames have heat, you should be fine,...

    If the frames have heat, you should be fine, single pane maybe not.
  28. Thread: Display Doors

    by Bob-Brr
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    532

    Styeline is a quality door system, keep in mind...

    Styeline is a quality door system, keep in mind these are much more then just doors, the shelving systems are unique to each manufacturer.
    I had a customer in Sarasota that requested a quote on a...
  29. EEVs are shit!

    EEVs are shit!
  30. Replies
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    Shit happens, that's why they keep guys like us...

    Shit happens, that's why they keep guys like us on speed dial!
  31. Replies
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    For the first few minutes, and until your...

    For the first few minutes, and until your pressure limiting Expansion valve begins to modulate, super heat is guess work. I start my super heat readings once the box temp gets to no more than 10...
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    Shut the unit down and watch you suction...

    Shut the unit down and watch you suction pressure, does it rise fast? If not your TXV is bad. I would rule out components before I started dumping gas.
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    All I purchase is the 700, if you place it...

    All I purchase is the 700, if you place it correctly it is many times, better then OEM. I have never fielded a complaint. I find the higher cut in on the 701 unsettling.
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    Most manufacturers I have worked for, dictate...

    Most manufacturers I have worked for, dictate 18-16 suction in 404A cap tube systems once near set point.
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    I started with NYS in 81, after a 4 year navy...

    I started with NYS in 81, after a 4 year navy hitch, I am glad I survived to retire, the bennies are worth the frustration they put me through. The money sucked, the experience in the facility I...
  36. Thread: Ammonia

    by Bob-Brr
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    1,365

    What is "good", I am not sure why you would want...

    What is "good", I am not sure why you would want someone else's definition, but, here is mine. I have loved the field of engineering since I was a lad on the farm. I desired information, and wanted...
  37. Thread: Ammonia

    by Bob-Brr
    Replies
    29
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    1,365

    When I first started at the university, all our...

    When I first started at the university, all our chillers were absorbers, the US Navy's older ships were popular for them as well. From my understanding, subs used them because they tended to run...
  38. Thread: subcooler

    by Bob-Brr
    Replies
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    1,375

    I would think any attempt at heat scavenging...

    I would think any attempt at heat scavenging after the EXV will only serve to ruin your super heat, costing you loss of capacity, and the possibility of compressor damage.
  39. Thanks for enlightening me! Not that I will ever...

    Thanks for enlightening me! Not that I will ever use it (but I like to learn). Haven't done HVAC on any real scale since I retired, when 410A was just flooding the market.
  40. Replies
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    I have working with R290, I appreciate the...

    I have working with R290, I appreciate the energy efficiency. Is CO2 as efficient?
  41. I am all for flushing suction lines to get all...

    I am all for flushing suction lines to get all the oil out. Not having traps on a system with a 20' or more rise, is an alien concept to me.I would double checked before I ran the unit without them.
  42. Remove traps? Why?

    Remove traps? Why?
  43. Replies
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    1,504

    When a condensing unit is matched with an air...

    When a condensing unit is matched with an air handler, it is because they each are designed to handle the load of the other, if you are running a balanced system, and suddenly you shut half the load...
  44. I worked at a landfill years ago, on their...

    I worked at a landfill years ago, on their garbage smushing equipment, I got my automotive cert just for these guys, cause, hey, they loved me. I told them, I do not work on dashboards, if there is...
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    467

    Over charged, suction pressure should be around...

    Over charged, suction pressure should be around 11-14#
  46. Thread: Nickel Plating

    by Bob-Brr
    Replies
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    1,374

    Drill holes through the curtain, and zip tie the...

    Drill holes through the curtain, and zip tie the probe to the correct spot on the curtain, perfect redneck repair.
  47. Thread: Pipe sizing

    by Bob-Brr
    Replies
    40
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    1,857

    I have replaced MILES of molded saturated " wall...

    I have replaced MILES of molded saturated " wall insulation on freezer suction lines. I would never use it on a freezer.
    I have also, in the worst situations, tied and foil taped the liquid line...
  48. Thread: RAYPAK X-Fyre

    by Bob-Brr
    Replies
    3
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    761

    An ohm meter seldom tells on a spark wire, you...

    An ohm meter seldom tells on a spark wire, you will need to bypass it or isolate it, so the wire insulation has a bigger gap then the gap to ground on your spark head.
  49. Thread: RAYPAK X-Fyre

    by Bob-Brr
    Replies
    3
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    761

    Sounds like you might have a bad spark wire, can...

    Sounds like you might have a bad spark wire, can you reroute it so it doesn't go through any penetrations are near any place it can ground to.
  50. Thread: Pipe sizing

    by Bob-Brr
    Replies
    40
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    1,857

    Ensuring proper oil return is also part of the...

    Ensuring proper oil return is also part of the piping design. Oil traps (P-traps) installed at the coil outlet, inverted P-traps where the refrigeration lines exit to the roof, and riser traps for...
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