Search Results - HVAC-Talk: Heating, Air & Refrigeration Discussion

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Type: Posts; User: jeff520

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  1. Thread: Noisy Register

    by jeff520
    Replies
    23
    Views
    1,567

    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
    824

    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
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    1,840

    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
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    840

    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
    775

    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
    536

    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
    1,106

    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
    1,106

    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
    1,106

    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
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    851

    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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    485

    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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    512

    2.44 gallons per day. You are correct.

    2.44 gallons per day. You are correct.
  14. Replies
    181
    Views
    4,827

    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
    4,827

    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
    4,827

    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
    1,392

    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
    2,616

    Try going there directly ...

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

    Then click on Lecture Notes
  20. Replies
    11
    Views
    1,626

    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
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    4,149

    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
    1,721

    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
    1,721

    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
    1,721

    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
    1,721

    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...
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