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  1. Replies
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    Bleed the pressure off.

    Bleed the pressure off.
  2. Replies
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    1,940

    Negative. Limit nitrogen flow to the minimum to...

    Negative. Limit nitrogen flow to the minimum to prevent air entry. The line should not be under a measurable gauge pressure, restrict pipe ends so there is only a slight flow. If not capped on...
  3. Assumes microprocessor and software...

    Assumes microprocessor and software compatibility. Model # not listed.

    Sporlan only requires digital enable & pumpdown signal. Easy setup, low relative cost. No software updates needed.
  4. Sporlan sells the controller and valve. Will...

    Sporlan sells the controller and valve. Will need a power supply.
  5. Replies
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    1,017

    Locktite makes a cleaner and two primers. Donít...

    Locktite makes a cleaner and two primers. Donít use the fast cure primer, the slower cure works great. With fast cure if you stop to get another bite with the wrench itís already hardened.
  6. I have a couple. Used to use on industrial jobs...

    I have a couple. Used to use on industrial jobs quite a bit. Would suck water into the tip every couple of years and smoke one.
  7. Replies
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    341

    Was a load calculation done? House sq Ď? What is...

    Was a load calculation done? House sq Ď? What is the oa temp? Duct and attic insulated? Air temps even though out the house?
    Dtís appear typical.
  8. Is that his name? Met a guy from India, name on...

    Is that his name?
    Met a guy from India, name on his business card was ďDik ShitĒ.
  9. Original was GE. Assume their patent expired.

    Original was GE. Assume their patent expired.
  10. Replies
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    563

    Page 11, Rigid ďSystem SafeĒ dye, for systems...

    Page 11, Rigid ďSystem SafeĒ dye, for systems with Copeland compressors.
  11. Replies
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    319

    Pumpdown the compressor and monitor the pressure....

    Pumpdown the compressor and monitor the pressure. If it has compressor suction & discharge service valves use them to verify discharge check valve and liquid line solenoid/exv are seating.
  12. Thread: GPM

    by ehsx
    Replies
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    264

    Majority of older systems were at ashrae...

    Majority of older systems were at ashrae standard. You need the equipment design data as sold, sales rep, or equip mfg can supply if the customer does not have on hand.

    Ashrae:
    2.4 gpm/ tn...
  13. Replies
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    319

    Refrigerant can migrate due to temp difference if...

    Refrigerant can migrate due to temp difference if the evap sat is lower than the condenser or pressure difference if there is any path not sealing. That would include the ecomizer solenoid.
  14. Replies
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    563

    Must not be proud of it, did not see it mentioned...

    Must not be proud of it, did not see it mentioned in the lit. They did list an approved leak detection additive, first time Iíve seen a major mfg list that.
  15. Replies
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    563

    Never seen micro-channel with...

    Never seen micro-channel with receiver/headmaster. Vfd only.
  16. Replies
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    204

    Should not even contact insulation. Since just...

    Should not even contact insulation.
    Since just replaced, check runout & balance/ vibration with panel off.

    If the noise was not there before bearings were replaced, anything else changed?
  17. Replies
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    204

    Looks like the fan shaft is in contact with the...

    Looks like the fan shaft is in contact with the side cover. Bearing locks, fan set screws, and pulley may need to be loosened and realigned .
  18. Replies
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    563

    Hottest day of summer receiver should be near...

    Hottest day of summer receiver should be near full, coldest day of winter near empty.
  19. Replies
    12
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    319

    Three choices: 1. Liquid injection solenoid 2....

    Three choices:
    1. Liquid injection solenoid
    2. Discharge check valve
    3. Liquid line solenoid/ exv

    Most likely #2. If the compressor has optional service valves it will be easier to evaluate. ...
  20. Replies
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    1,940

    The pipe ends were blocked, standing on end, so...

    The pipe ends were blocked, standing on end, so no thermal air flow. No nitrogen, no excess heat, correct tip selection & settings, proper preheatÖ.
  21. Replies
    12
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    319

    Model number? Oil temp must be x*f above...

    Model number?
    Oil temp must be x*f above saturated. Liquid ref may be leaking into compressor thru injection or ecomizer.
  22. Scary

    Scary
  23. Replies
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    349

    Using cooling tower free cooling, plate...

    Using cooling tower free cooling, plate heat-exchanger, 3-way valves and controls typically would have a short payback north of the Mason-Dickson.
  24. Replies
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    1,355

    Itís like osha. Selective enforcement, relying...

    Itís like osha. Selective enforcement, relying on people to understand incomprehensible and changing regulations written by bureaucratics.

    Iíve learned as an instructor and technical advisor to...
  25. Replies
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    349

    Size matters.....

    Size matters.....
  26. Replies
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    1,355

    Recover to below 5# before draining to atmosphere.

    Recover to below 5# before draining to atmosphere.
  27. Replies
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    refrigerant dependent based on table. 825753

    refrigerant dependent based on table.

    825753
  28. Replies
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    349

    Seen on lp & hp centrifugals. Without a liquid...

    Seen on lp & hp centrifugals. Without a liquid refrigerant pump I think it was ~ 20-30% of nominal capacity and normally running a higher evap lwt.
  29. Replies
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    Just saying sometimes best not to ask or tell,...

    Just saying sometimes best not to ask or tell, but some carry it way to far.
  30. Replies
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    1,355

    Opening requires recovery. Cannot achieve EPA...

    Opening requires recovery. Cannot achieve EPA requirements by internal system pumpdown.
  31. Thread: E-Race

    by ehsx
    Replies
    18
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    3,716

    Really cool. Needed turbo sound effects! A...

    Really cool. Needed turbo sound effects!

    A few years back, before top portion was paved I drove to the top. Jumped out and the lack of oxygen about knocked me down. Had watched the "Wide World...
  32. Thread: E-Race

    by ehsx
    Replies
    18
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    3,716

    Thought it interesting the the rider did not beat...

    Thought it interesting the the rider did not beat his own record on a gas bike. At least he did not have to recharge to get back down, coasting all the way.....
  33. Replies
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    349

    Daikin also went the cheap easy route and added a...

    Daikin also went the cheap easy route and added a glycol coil. Would like to see a refrigerant side free cooler, but the mfg's decided to go the fast track.

    A number of companies make fluid...
  34. Replies
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    Was system evacuated properly? Was system...

    Was system evacuated properly?

    Was system precharged to at least 80% before starting?
  35. Replies
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    Off gassing is not considered deminimus release. ...

    Off gassing is not considered deminimus release. Since mid 90's, oil can not be removed from a pressurized system to an open container. Also there have been a number of updates to 608 since...
  36. Replies
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    EPA 608, Service Practice Requirements, 1st item...

    EPA 608, Service Practice Requirements, 1st item states when opening a system evacuation and recovery of refrigerant is a requirement. Anything else goes under the heading "don't ask, don't tell",...
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    Code requires load calculations in most places...

    Code requires load calculations in most places when replacing equipment.
  38. Thread: FILTER DRIER.

    by ehsx
    Replies
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    900

    825726

    825726
  39. Thread: FILTER DRIER.

    by ehsx
    Replies
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    900

    825712 The desiccant only absorbs moisture, it...

    825712

    The desiccant only absorbs moisture, it does not fill up with water. It it does the filter drier is the least of your problems.
  40. Thread: FILTER DRIER.

    by ehsx
    Replies
    41
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    900

    😁

    😁
  41. Replies
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    1,017

    Since 1993, & HFC's , only approved products at...

    Since 1993, & HFC's , only approved products at the mfg's I worked at were made by Locktite. 277, 554, & HVAC. Would only use the non-anaerobic sealants on relief valves. Earlier used AV & AVV...
  42. Replies
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    150

    825706 Think I have a 1 x 12 board, 2x sounds...

    825706

    Think I have a 1 x 12 board, 2x sounds like more work. Need to get some ice cream before I finish the whole pan.

    Maybe by next year I can have the materials together to make wine.
  43. Replies
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    Probably part physical and part mental. Just...

    Probably part physical and part mental. Just knowing you are semi or full retired keeps you from pushing yourself as much. I retired 4/1 and up till then still outworked most of the youngins even...
  44. Replies
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    No. Keeps from having to fill the complete...

    No. Keeps from having to fill the complete system with glycol. Each side should have its own expansion tank and relief valves.

    Also easy to add free cooling circuits with this arrangement.
  45. Replies
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    Blackberries, thorns, ticks & cobbler

    825702825703825704

    Any tricks for picking blackberries without getting torn up by thorns or eaten up by ticks?

    Used sulfur powder on pants legs to slow down ticks and a plastic sled to get...
  46. Thread: FILTER DRIER.

    by ehsx
    Replies
    41
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    900

    Suction accumulators and steel body reversing...

    Suction accumulators and steel body reversing valve, seen a few rust thru.
  47. Oil must be ~ 30*f above evap saturated. ...

    Oil must be ~ 30*f above evap saturated.

    Usually occurs on morning start up when warmer bldg water returns to chiller. Heater has to raise oil sump temp before starting.

    Start cw pumps...
  48. Replies
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    869

    I like your blue goose, you need a "Westy"...

    I like your blue goose, you need a "Westy" Westinghouse and a Daikin “Pichon-kun” to be up to date. Some of the “Pichon-kun” videos are really funny.
  49. Replies
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    Condensation/rust can be an issue especially if...

    Condensation/rust can be an issue especially if natural draft.
  50. Replies
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    70 *f outside, open the windows. Indoor coil...

    70 *f outside, open the windows. Indoor coil canít freeze until suction pressure is below 58#.
    77# = 46*f
    169# = 90*f

    Loss of air flow or low return air temp. Check tístat setpoint &...
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