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  1. Replies
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    Intermittant TXV or CFM

    Any Hints on identify what is failing when I am not at broken AC.
    We put a logger device and determine that we experience hi pressure at some times. Compressor shuts down. Then all works well...
  2. Make sure yoiur dealer supplies you with AHRI...

    Make sure yoiur dealer supplies you with AHRI certificate to prove the ten year warranty elegibility. I recently ordered Armstrong 4 ton cond. unit with a Armstrong four ton drive furmnance and a...
  3. Fluke allows you to ground out conductor and it...

    Fluke allows you to ground out conductor and it reports back that you have found the exact conductor.
  4. I use a Fluke toner. very strong 8 foot signal. ...

    I use a Fluke toner. very strong 8 foot signal. I like the "tonechanging" feature that lets you verify you located the exact conductor out of a bundle.
  5. a higher end AC will have the options already...

    a higher end AC will have the options already installed, but be sure to ask. Not much of a leap to go with 16 Seer rated system. Be sure they provide AHRI documentation. This usually is needed to...
  6. How much is left in a jug. I'd guess 1 lb. I...

    How much is left in a jug. I'd guess 1 lb. I have a recovery bottle that I mark "virgin" refrigerant. I had about twenty jugs I recovered and had alot of refrigerant moved to the new recovery...
  7. any damaged paint? hold the insurance company...

    any damaged paint? hold the insurance company responsible to correct all defaults.

    It depends on insuranse coverage, "replacement cost" is the phrase to look for.
  8. Plastic pan. I've had a couple with hair line...

    Plastic pan. I've had a couple with hair line cracks that leaked. Look closely at the threaded pipe conections.
  9. Replies
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    654

    I have used 3/8" compression couplers and also...

    I have used 3/8" compression couplers and also flares on trane 35 year old aluminum condenser coils. Never had a problem.
  10. It sounds like a two stage CU, if you are pulling...

    It sounds like a two stage CU, if you are pulling the low voltage wires. Most 2 stage CU have their charge checked at 100% operation. But you describe a bit different. What is the model#?
  11. Replies
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    299

    Power draft furnace are much more durable. You...

    Power draft furnace are much more durable. You have that.

    Most likely, you will have an evaporator freon leak and be forced to change the system with little indication. Although the equipment...
  12. i'd leave it. Much more expensive to cut a hole,...

    i'd leave it. Much more expensive to cut a hole, in the future, then it would be to have it already there if you dicide you want it back. I do believe the benefits having as much powered...
  13. Replies
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    302

    Always helps to spray wd40 on the fins to make...

    Always helps to spray wd40 on the fins to make work easier.

    Pay close attention to the post combed fins and look for torn fin material. If this is insurance, the repair is not adequate.
  14. Replies
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    Probably work fine. Are there turning vanes in...

    Probably work fine. Are there turning vanes in the supply, even better.
  15. Replies
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    560

    Then 20 Seer rating is possible, and it will save...

    Then 20 Seer rating is possible, and it will save electricity money. May be a better way to invest in saving AC dollars, though. Maybe that what was meant by the 20 vs. 13 seer statement.
  16. Replies
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    560

    Little confused. Help me. SEER rating (AHRI) is...

    Little confused. Help me. SEER rating (AHRI) is an equipment rating, right? What is lost in the air distribution is not measured.
  17. Replies
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    1,946

    Gotta love the engineers at Trane and Rheem that...

    Gotta love the engineers at Trane and Rheem that use to put the fastenrers at the bottoms of the CUs. Had to dig some of them out olly to find they were too rusted to unscrew.
  18. Replies
    17
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    1,946

    I had a side discharge rooftop unit looked...

    I had a side discharge rooftop unit looked similar, except with 3" of new roofing poured up to it. I needed to change it. Ended leaving old RTU on roof and ducted to new RTU.

    Told owner he would...
  19. Replies
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    669

    Armstrong is a fine product and you will be able...

    Armstrong is a fine product and you will be able to get warranty on parts for 10 years. Period. Labor warranty is an installer issue though. Also, new homes have an implied warranty.

    I have seen...
  20. Replies
    13
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    630

    I' believe Armstrong has more safeties than...

    I' believe Armstrong has more safeties than Air-Ease,
  21. Replies
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    645

    txv-new way to do it

    I am seeing new installs, on new house where the txv bulb is left dangling loose in ambient attic air. A lot of them.

    What's up with that?
  22. freezing up?? Stop working in damp weather? I...

    freezing up?? Stop working in damp weather? I know, LV.
  23. Replies
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    458

    How to avoid the un avoidable.

    Had an incident, yesterday, that need help for the future. I have been doing equipment for decades and this is a first.

    Replaced a rather clean plenum coil in a very clean house. At start-up...
  24. Replies
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    744

    Pad can be changed easily without much effort or...

    Pad can be changed easily without much effort or disconnecting unit. Contractor should correct this.
  25. If tech knew he was mixing refrigerants, he...

    If tech knew he was mixing refrigerants, he potentially is causing some party to incur a great expense- whoever ends up processing the old R22. No different as someone selling a car that the...
  26. Purely unethical. Mixed refrigerants, if this...

    Purely unethical.

    Mixed refrigerants, if this is your situatoion, cannot be re manufactured recertified after it is cleaned.

    Different company recovering your mixed refrigerant will add it to...
  27. Replies
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    700

    Lets say that ,theoretically, the out side air...

    Lets say that ,theoretically, the out side air was adding 1000 btus of load to the load that was calculated, try to add insulation somewhere that would reduce the building envelope energy loss by...
  28. Replies
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    700

    The OA is not 100%. just a portion. HVAC is...

    The OA is not 100%. just a portion. HVAC is using a mix of OA and return air. The return air would show the effcts of heat loss through walls and ceiling and low R values. The OA issue only be an...
  29. Replies
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    700

    Adding insulation will reduce heating or cooling...

    Adding insulation will reduce heating or cooling needed and may allow enough capacity so OA is not a factor.
  30. Replies
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    700

    Energy codes require equipment sized very close,...

    Energy codes require equipment sized very close, no oversizing. maybe you can make it up with more insulation, but someone screwed up (AC contractor) and will have to pay up.

    I do new houses and...
  31. Some setups allow evaporator change-outs without...

    Some setups allow evaporator change-outs without disturbing the furnace. Then I would do that and not worry about furnace until later.

    When we change out evaporators, we usually change plenum. ...
  32. Replies
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    Condenser coil cleaner in an aerosal can. This...

    Condenser coil cleaner in an aerosal can. This stuff is strong, doesnt spill or take much truck space and is easily counted. Use the type that requires rinsing, and wear respirator.
  33. May not be a furnace problem but vent that caused...

    May not be a furnace problem but vent that caused it.
  34. I start by choosing the size plenum I need by the...

    I start by choosing the size plenum I need by the taps and work back to the furnace. If space allows, I use a larger 21", but capacity is the same in either size.
  35. Many higher costing thermstats have more software...

    Many higher costing thermstats have more software options you can set to customize. Both manufactures make builders grade and high feature stats.

    I use honeywell exclusively. It cuts down on...
  36. I have retrofit dozens of systems where line sets...

    I have retrofit dozens of systems where line sets in a multistory building that cannot be changed out and have not had a single problem after a simple flush.
  37. They make after market heat exchangers that work...

    They make after market heat exchangers that work better with straight cool applications. A good refrigeration tech can put something together, but parts are not produced for the masses and equipment...
  38. Rarely work on mobile homes, but I remembered...

    Rarely work on mobile homes, but I remembered that circuit had to be energized to keep AC compressor off! Need tech to walk through schematic.
  39. Replies
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    1,246

    Was salemen a salesmen or the installer/tech? I...

    Was salemen a salesmen or the installer/tech? I dealt with an AC salesmen that would close on 90% of his sales calls. Yet he only new how to price equipment, company went broke after three years....
  40. Replies
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    Thanks for pointing that out Ryder. Now I won't...

    Thanks for pointing that out Ryder. Now I won't have to be put on the spot and expect to know what a telestat is
  41. Typical on 440 volt and higher set-ups

    Typical on 440 volt and higher set-ups
  42. Replies
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    Well, the evaporator is 5 ton.

    Well, the evaporator is 5 ton.
  43. Replies
    15
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    549

    what is the evap model #

    what is the evap model #
  44. Break Y for float switch is better. If you shut...

    Break Y for float switch is better. If you shut off the blower, the water may drain faster out the overflowing drain pan then recycle when blower comes back on. I admit, I usually break C though,...
  45. If you live in desert dry conditions, it may...

    If you live in desert dry conditions, it may never sweat. Day to day, your weather conditions will change. Know your dewpoint.
  46. Install a moisture indicating sight glass. I...

    Install a moisture indicating sight glass. I wouldn't worry too much.
  47. Replies
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    591

    You cannot tie two systems to the same register. ...

    You cannot tie two systems to the same register. Create prolems. What happens when 4 ton unit kicks on.....all the 66 degree are will be pulled out of the room. Best to have a dedicated system for...
  48. Replies
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    2,069

    I prefer Armstrong because of my dealer support. ...

    I prefer Armstrong because of my dealer support. Trane may be good, but too many times I have had to oreder a part that takes weeks to get in. Too many OEM parts on Rheem and Trane.

    My dealer...
  49. Replies
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    610

    HVAC company are required to do load calcs for...

    HVAC company are required to do load calcs for new energy codes (new construction), so they can. Expect to pay for this service.

    Supply air. Ductwork can be oversized, cause velocity to fall. ...
  50. When spark ignitior comes on, so does pilot gas...

    When spark ignitior comes on, so does pilot gas valve. Is the gas valve shorted or pulling voltage down because of excessive amp draw (but that would be 24VAC so I don't know)
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