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  1. Thread: Noisy Register

    by jeff520
    Replies
    23
    Views
    1,828

    If it were me I would be looking at the H&C...

    If it were me I would be looking at the H&C catalog and replace the register with a high quality one designed to direct the air where I wanted it to go.

    The catalog has all the specifications on...
  2. Probably you did clear a clog, but you blew it...

    Probably you did clear a clog, but you blew it back into the unit and it will return bigger than before.

    Next time clear it with a shop vac so you will suck it out of the line and it will be...
  3. Replies
    3
    Views
    957

    Your camera does not appear to have picked up any...

    Your camera does not appear to have picked up any data from ink traces so Photoshop is not going to help. Try using an infrared filter on the camera and see if that shows anything.
  4. Replies
    12
    Views
    2,240

    Long shot - but can you check the AC voltage at...

    Long shot - but can you check the AC voltage at times when it will run and at times when it will not run.
  5. Replies
    13
    Views
    999

    I think of the CPH setting as being "After a...

    I think of the CPH setting as being "After a call, then no more calls will be allowed for X minutes" where X = 20 for 3CPH, or X = 15 for 4CPH and so on.

    If there is no call after the lockout,...
  6. Thread: ongoing issue

    by jeff520
    Replies
    13
    Views
    926

    Rep, I agree with you about the DIY aspect of...

    Rep, I agree with you about the DIY aspect of Acmanco's advice, but read the OP's problem. For TEN YEARS no company has been able to find the problem.

    Best advice might be to find a better...
  7. Replies
    1
    Views
    603

    Checking the charge

    Was thinking about what happens inside a condenser coil (hot gas coming in at the top and supercooled liquid leaving at the bottom if I understand it correctly) and wondered what it would look like...
  8. Thread: I had an idea!

    by jeff520
    Replies
    19
    Views
    1,320

    Many good ideas start as bad ideas. You bounce...

    Many good ideas start as bad ideas. You bounce them around a little and slowly a good idea emerges. Dandyme, interesting to see that Kool-Fire is still around. They must have come up with at least...
  9. Thread: I had an idea!

    by jeff520
    Replies
    19
    Views
    1,320

    My reasoning was that it would be a simple way to...

    My reasoning was that it would be a simple way to defrost because it would do away with the need for the defrost logic and the need to temporarily switch to AC mode to get heat to the coils and have...
  10. Thread: I had an idea!

    by jeff520
    Replies
    19
    Views
    1,320

    I had an idea!

    What if a heat strip was designed to warm the air being drawn in to the outside unit of a heatpump and controlled by the temperature of the exhaust air from the unit such that the exhaust air...
  11. Replies
    10
    Views
    981

    I just retired a 17 cu ft refrigerator that used...

    I just retired a 17 cu ft refrigerator that used 160Watts when running and replaced it with a 25 cu ft LG model with a linear compressor that uses between 40 and 120 Watts when running.

    Anybody...
  12. Replies
    6
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    585

    Strange thing is that turning the fan blades over...

    Strange thing is that turning the fan blades over will make no difference to which way the air blows. The only way to change blow to suck is to reverse the direction of the motor.
  13. Replies
    7
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    614

    2.44 gallons per day. You are correct.

    2.44 gallons per day. You are correct.
  14. Replies
    181
    Views
    6,480

    Fearless, Your missing heat is the heat that had...

    Fearless, Your missing heat is the heat that had to be added to the house to warm the heated environment enough to pull the thermostat through its dead zone. Thermostats are usually set to require...
  15. Replies
    181
    Views
    6,480

    We all have "blind spots" and once a discussion...

    We all have "blind spots" and once a discussion like this one starts and a couple of viewpoints can see each others blind spot but not recognize or admit their own then we are setting the stage for a...
  16. Replies
    181
    Views
    6,480

    What about the next hour?

    I beg to differ with you, Shophound.

    The first hour there will be two 16 minute heating cycles and one pause of 27 minutes. The following hour will have two pauses and only one heating cycle.
    ...
  17. Replies
    21
    Views
    1,641

    No joke, just two schools of thought

    There are those who think that high supply/low return is the best way to go in the summer (and vice versa in the winter) and those who believe that proper duct design to get the correct airflow and...
  18. FWIW - I have two Fujitsu mini splits in my house...

    FWIW - I have two Fujitsu mini splits in my house and they sound between quiet (High fan) and almost silent (Low fan) to silent (Quiet fan). The fan has five settings, Auto, High, Medium, Low and...
  19. Replies
    42
    Views
    3,159

    Try going there directly ...

    Try going there directly http://courses.washington.edu/me425/

    Then click on Lecture Notes
  20. Replies
    11
    Views
    1,845

    If you are making no duct changes then for sure...

    If you are making no duct changes then for sure do NOT install a bigger system! Better yet do a Manual J to see what size system you should be installing.
  21. Replies
    24
    Views
    5,402

    A charged capacitor can stay charged for quite a...

    A charged capacitor can stay charged for quite a while. Best to discharge it properly (use a resistor of around 100 ohms, not the tip of a screwdriver) and play safe. No-one needs to get a shock.
  22. Thread: BS???

    by jeff520
    Replies
    22
    Views
    2,046

    Beg to differ. I agree that the total WEIGHT of...

    Beg to differ. I agree that the total WEIGHT of air coming in to the room is equal to the WEIGHT of the air leaving the room, but since there is a pressure drop across the register in the door then...
  23. Thread: BS???

    by jeff520
    Replies
    22
    Views
    2,046

    Dash, That is where I have a problem Assume...

    Dash, That is where I have a problem

    Assume an airtight room with a supply register and a single door with another register the same as the supply register cut into it.

    Air comes out of the...
  24. Thread: BS???

    by jeff520
    Replies
    22
    Views
    2,046

    Still do not understand

    If the registers are correctly sized for the tonnage of the system, then what difference does it make how big the duct is, providing it is at least "big enough"?

    Consider the simplest possible...
  25. Thread: BS???

    by jeff520
    Replies
    22
    Views
    2,046

    BS???

    Talking to the tech that did a recent PM on my system the subject of duct sizing came up. I told him I thought that bigger ducts would be better and he said that if the ducts were too big then there...
  26. Credit requires listing

    Unless your contractor is going to do all the testing and paperwork to get the combination listed you will not qualify for the credit.

    Credit depends on the listing meeting the required numbers. ...
  27. deleted

    deleted
  28. Under worst case cooling conditions (max outside...

    Under worst case cooling conditions (max outside temp/solar radiation and normal indoor temperature/heatload) expect a correctly sized AC to be running 100% of the time.

    You did not say how many...
  29. Replies
    11
    Views
    970

    When air is cooled it loses the ability to hold...

    When air is cooled it loses the ability to hold water vapor. Relative humidity measures the amount of water vapor in the air compared to the maximum amount the air could hold at that temperature.
    ...
  30. Replies
    22
    Views
    3,133

    Not sure what this is

    104692
  31. SSM1 price

    SSM1 looks to be selling for about $250. Several distributers claim to have it, Easy to find on Google as SSM1 superheat. Without the superheat you get a lot of non relevant answers.
  32. Replies
    1
    Views
    990

    measurement will indicate appropriate AC capacity

    It depends very much on the capacity of your AC unit and the heat gain of your house. Heat gain is dependent on the difference between the outside temperature and the inside temperature and how well...
  33. Replies
    3
    Views
    754

    Get the Amana stat. Whatever Amana changed to...

    Get the Amana stat. Whatever Amana changed to put their brand name on it is their trade secret to know, and the change might be important. There is no way for you to find out what (if any) the...
  34. Replies
    4
    Views
    563

    Thousands of installations run well with no surge...

    Thousands of installations run well with no surge protection but then there are hundreds of households that do suffer from power line disturbances. The choice to protect yourself depends to a large...
  35. Replies
    3
    Views
    647

    400 CFM per ton is the suggested airflow for most...

    400 CFM per ton is the suggested airflow for most installations, but in Florida you might want to drop this to 350 or so in order to get better humidity removal. In any case it would be a good idea...
  36. Interesting that they do not know how to...

    Interesting that they do not know how to calculate cubic feet. They say the largest volume that the unit should handle is six cubic feet, 6' X 6' X 6'.

    I make that closer to 216 cubic feet......
  37. Replies
    52
    Views
    3,111

    My XL19i is not a heat pump, just plain AC. That...

    My XL19i is not a heat pump, just plain AC. That is why it bugs me to keep the crankcases warm through the winter. Fear not, I will give it 48 hours to warm up before starting the summer cooling...
  38. Replies
    52
    Views
    3,111

    Paul, I'm very happy for you that you can blow...

    Paul, I'm very happy for you that you can blow off $120 per year as a "little" cost.

    Sad that you display such an attitude towards folk that are watching their pennies.

    My saved pennies put...
  39. Replies
    52
    Views
    3,111

    On my Trane XL19i there is a thermostatic switch...

    On my Trane XL19i there is a thermostatic switch to cut the power to the crankcase heaters. The switch is mounted on the pipe coming from the compressor, which gets very hot when the compressor is...
  40. Replies
    13
    Views
    964

    Your reversing valve is not reversing for some...

    Your reversing valve is not reversing for some reason. Could be electrical or mechanical fault. Your installer will know for sure.
  41. Replies
    19
    Views
    1,204

    Considering just inverter cost,the micro...

    Considering just inverter cost,the micro inverters are less expensive as long as you plan for about fifteen panels or less. With twenty one panels I would have saved a little money by having a...
  42. Replies
    19
    Views
    1,204

    One manufacturer of the small inverters for use...

    One manufacturer of the small inverters for use one per panel is Enphase ( www.enphaseenergy.com ). I have twentyone 170 Watt PV panels on my roof in Tucson and have never seen more than 3.3KW...
  43. Replies
    7
    Views
    1,847

    Grille has an effective area. Lets call it F...

    Grille has an effective area. Lets call it F square feet.

    The air coming out has a velocity, call it S feet per second.

    Air velocity S times Area F = cubic feet air moved per second
    ...
  44. Replies
    6
    Views
    912

    Suppose a furnace is 80% efficient, and it takes...

    Suppose a furnace is 80% efficient, and it takes X amount of gas for Y duration to heat your home.

    Then, if a furnace was only 40% efficient it would take twice as much gas to provide the same...
  45. Replies
    6
    Views
    912

    The cooler the air at the outlet the more heat...

    The cooler the air at the outlet the more heat you are extracting from the heat exchanger, and so the more efficiency you gain. BUT, you also need to take into account the energy required by the...
  46. Replies
    17
    Views
    1,197

    Would it be worth considering using a...

    Would it be worth considering using a communicating thermostat like the IAQ with the existing wiring? The lower voltage on the wires should reduce any crosstalk between them, and only needing three...
  47. Replies
    17
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    936

    Read all about it: ...

    Read all about it:

    http://en.wikipedia.org/wiki/Therm
  48. Replies
    24
    Views
    1,580

    Quote: I'm not trying to do anything myself....

    Quote: I'm not trying to do anything myself. Each of teh contractors that have given me proposals have given me their load calculations and duck schematics with their proposal. when I ahve...
  49. Replies
    4
    Views
    1,259

    Fuse blown should mean no load on the...

    Fuse blown should mean no load on the transformer. If it is still hot and humming that points to a shorted turn in one of the transformers coils.

    That would not explain the blown fuse, which...
  50. Replies
    14
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    3,214

    70 Watts X 24 hours X 30 days/month = 50,400 ...

    70 Watts X 24 hours X 30 days/month = 50,400 WattHours = 50.4 KWh

    At 10 cents per KWh = $5.04 per month

    I have two crank case heaters in my XL19i, and during the winter I just kill the breaker...
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