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  1. Replies
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    On my Carrier heat pump, defrost is a function of...

    On my Carrier heat pump, defrost is a function of time and outside coil defrost thermostat.
    The thermostat is set to close its contacts at 30*F (to initiate a defrost cycle at the appropriate...
  2. Replies
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    3,750

    Right On.

    Right On.
  3. Replies
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    3,750

    I had two 'buzzing' problems. The first one was...

    I had two 'buzzing' problems.
    The first one was a loud one occasionally coming out of the heat pump condenser. Opened the beast up and traced the noise to the reversing valve coil. Put my finger on...
  4. Replies
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    2,442

    Larry, I got my curves from the Carrier Product...

    Larry,
    I got my curves from the Carrier Product data booklet for the Carrier 38YXA heat pumps. Mine is a 2 ton unit and the following curves give information for 2, 2.5, 3, 3.5, 4 and 5 ton heat...
  5. Replies
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    2,442

    There are several ways to determine the setting...

    There are several ways to determine the setting of the balance point. Here is how I did mine:

    I used the heatpump output curves to determine output for 30*F, 35*F and 40*F outdoor temperatures...
  6. Replies
    7
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    1,354

    I run my Lennox G60DFV furnace off a Generac...

    I run my Lennox G60DFV furnace off a Generac XL4000 4,000 watt generator during infrequent power outages.

    I have an approved single circuit manual transfer switch connected to the house electric...
  7. Replies
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    2,442

    I'm not a pro but the calculation is...

    I'm not a pro but the calculation is straightforward.
    All types of energy can be converted from one form to another.
    In this calculation I'll express electric energy in terms of THERMS.

    from:...
  8. The following paper deals with dehumidification...

    The following paper deals with dehumidification when neither heating nor cooling are required.

    http://www.buildingscience.com/resources/mechanical/hvac/conditioning_air.pdf
  9. Replies
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    6,653

    The installation instruction book for my Carrier...

    The installation instruction book for my Carrier 38YXA heat pump describes the thermostat which (along with the timer) initiates a defrost cycle.

    This thermostat closes its contacts to enable a...
  10. Replies
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    589

    I am aware of the high price of electricity in...

    I am aware of the high price of electricity in Ontario. You poor people are paying for the sins of several past governments and of Ontario Hydro.

    The cost per kwh I mentioned was the total cost...
  11. Replies
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    589

    I did a calculation on costs for my house some...

    I did a calculation on costs for my house some time ago. The arithmetic is pretty detailed but not complicated.
    You may have to do some unit conversions because I used Candian information.
    Hope it...
  12. What is the cost difference between air...

    What is the cost difference between air conditioning only and a heat pump (which also provides air conditioning)?. While all the other advice is relevant, the above cost difference should govern in...
  13. Replies
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    2,636

    Sparking, which generates random radio frequency...

    Sparking, which generates random radio frequency waves, at brushes of a commutator motor is not so rare. You don't need a psychiatrist and it's not aliens.
    Clean commutator and make sure brushes...
  14. Replies
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    6,653

    I don't know if this applies in your case but...

    I don't know if this applies in your case but regardless of the lockout setting, the furnace will operate when the system calls for a defrost.
  15. Replies
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    6,653

    The regular owner's manual doesn't explain the...

    The regular owner's manual doesn't explain the lockout setting. You need the following pamphlet:
    Programmable Dual Fuel Thermostats. Installation, Start-Up, and Operating Instructions.
    You'll find...
  16. Replies
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    877

    1760 sq. ft. rancher in Vancouver B.C. area, just...

    1760 sq. ft. rancher in Vancouver B.C. area, just North of Blaine Wa.
    Replaced old 19 year old gas furnace in June/03 with 80% efficiency gas furnace.

    Installed 2 ton heat pump during summer...
  17. Replies
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    2,086

    In my house (dual fuel system), the outdoor...

    In my house (dual fuel system), the outdoor temperature sensor cuts out heat pump operation at 35*F and lower. It is necessary for the proper functioning of the equipment.
  18. Replies
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    3,406

    when I was comparing identical houses, I should...

    when I was comparing identical houses, I should have said that the windows in the second house faced West.
  19. Replies
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    1,573

    Crawl space walls are poured concrete and are...

    Crawl space walls are poured concrete and are insulated with R12 bat insulation.No vapour barrier on walls.

    Initially I painted the crawlspace floor with latex concrete paint. Painting did not...
  20. Replies
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    1,573

    I had a similar problem. My crawl space floor is...

    I had a similar problem.
    My crawl space floor is covered with very rough poor quality concrete. I covered it with a heavy gauge vapour barrier plastic sheets. Musty smell was reduced very...
  21. Replies
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    3,406

    There is no such thing as a rule of thumb. Take...

    There is no such thing as a rule of thumb.
    Take two identical houses. One has large windows facing North and the other one has the same windows facing South and gets reflections from a lake. If you...
  22. Replies
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    982

    I live in white Rock, just outside Vancouver. The...

    I live in white Rock, just outside Vancouver. The design temp. for heating for Vancouver is 17*F. My heat pump is a Carrier 38YXA 2 ton unit. with an HSPF of approximately 8.6 and a SEER of up to...
  23. Replies
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    982

    Most of the time, the outside temperature is...

    Most of the time, the outside temperature is above freezing.
    My heat pump is backed up by a natural gas furnace and the balance point is set at 35*F. Below balance point, furnace does all the...
  24. Replies
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    2,155

    Originally posted by virginiajersey [B]...

    [QUOTE]Originally posted by virginiajersey
    [B]

    Yes, I added a supply duct and register to the colder room. The room in which we do most of our living, was about 2*F colder than other rooms...
  25. Replies
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    2,155

    Keep in mind that I'm a homeowner who likes to...

    Keep in mind that I'm a homeowner who likes to keep himself informed and not an HVAC professional . My house is heated and cooled by a 2 ton Carrier Performance Series heat pump using a Carrier dual...
  26. Replies
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    2,155

    You mentioned 11,439 BTU/hr heat gain on the main...

    You mentioned 11,439 BTU/hr heat gain on the main floor and 6,357 BTU/hr heat gain on the top floor.

    Since your bottom floor is shaded and the top floor has heat gain through the attic, I suspect...
  27. Replies
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    982

    The programmable thermostat on my heat pump...

    The programmable thermostat on my heat pump allows for several setting changes in a day.
    Since I'm retired, the temperature setting for the whole day until bed time is constant at 68*F and drops to...
  28. Thread: Therm vs KWH

    by deme
    Replies
    8
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    1,416

    Calculations involve only ordinary arithmetic....

    Calculations involve only ordinary arithmetic. The following table may help

    http://www.onlineconversion.com/energy.htm

    [Edited by deme on 05-05-2006 at 11:14 AM]
  29. Thread: Power Rates

    by deme
    Replies
    18
    Views
    1,520

    British Columbia, Canada. More than 90% of...

    British Columbia, Canada.
    More than 90% of electricity comes from hydroelectric sources.

    Present Rates:
    Basic charge $0.12/day or $3.60 per 30 day month.
    Energy charge $0.0605/kwh

    Total is...
  30. Replies
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    1,146

    How many degree days of heating below the 35*F...

    How many degree days of heating below the 35*F balance point? Will the 90% + gas furnace pay for itself? 80% eff. furnace good enough?
  31. Replies
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    I made a more accurate assessment of the time...

    I made a more accurate assessment of the time saved in high heat only. You save only 4.5 minutes!
    See my twice-edited original post.
    I too tend to over analyze! It's fun!

    Regards Deme
  32. Replies
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    2,404

    I have a Lennox G60DFV downflow 2 stage furnace...

    I have a Lennox G60DFV downflow 2 stage furnace with a White-Rogers control board.

    Stage 1 (Low heat stage) of furnace is 68% of stage 2 high heat. Going to stage 2 right from the start will let...
  33. Too late to edit my original post. Here is info....

    Too late to edit my original post.
    Here is info. on my house for summer and winter 1 month periods.

    June 22 to July 23, 2005:
    Gas 1.9 GJ
    June 24 to July 23, 2005:
    electricity 725 kwh.
    ...
  34. House location: Surrey, B.C. (suburb of Vancouver...

    House location: Surrey, B.C. (suburb of Vancouver B.C.) 1/2 mile North of Blaine Washington.
    House built in 1984. Inside sq. ft. 1760. Rancher on 4 ft crawl space.
    House Wall insulation R12....
  35. I was faced with the same situation and rather...

    I was faced with the same situation and rather than monkey around with restricting air flows, decided to add a duct run to the "colder" room. Of course I could do that because of easy access to...
  36. CMHC Garbage Bag Airflow Test ...

    CMHC Garbage Bag Airflow Test

    http://www.cmhc-schl.gc.ca/en/burema/gesein/abhose/abhose_ce46.cfm

    Personal experience:
    1760 sq foot rancher over 4 foot high crawl space. Insulated walls with...
  37. Replies
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    898

    Are both rooms with same exposure, i.e. North,...

    Are both rooms with same exposure, i.e. North, East, etc...
    Does house have an attic. Ceiling insulation over both bedrooms the same? any obvious air leaks around windows?
    Does airflow from...
  38. Replies
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    1,205

    The temperature differential of 84*F going from...

    The temperature differential of 84*F going from -14*F means that the indoor temperature is 70*F.
    Heating requirements vary in a linear manner.
    Heating requirements for each degree difference...
  39. Thread: Defrost Issues

    by deme
    Replies
    5
    Views
    836

    I have a Carrier 2 ton 38YXA heat pump with...

    I have a Carrier 2 ton 38YXA heat pump with time/temp. defrosting.
    The defrost thermostat closes its contact 30*F +or- 3* and opens its contacts at 80*F +or- 5*.
    Consequence: lots of unecessary...
  40. Replies
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    2,651

    It's I who misunderstood!

    It's I who misunderstood!
  41. Replies
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    2,651

    Long, long duct runs? My two cents worth:...

    Long, long duct runs?
    My two cents worth: Insulate ducts on long runs to improve air temp. coming out at distant registers?

    My ducts are located in a heated, insulated crawlspace and I've...
  42. Replies
    39
    Views
    3,116

    Retired & living in Vancouver B.C. During...

    Retired & living in Vancouver B.C.

    During heating season: 6:00am to 10:00pm 68*F. 10:00pm to 6:00am 64*F. Occasionally drop daytime temp. by a couple degrees when leaving house for long time....
  43. Replies
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    Heat pump basics at: ...

    Heat pump basics at:

    http://energyoutlet.com/res/heatpump/
  44. Replies
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    1,013

    This is what my neighbour did some years ago in...

    This is what my neighbour did some years ago in his house:
    Second floor of the house had open staircase and had no air return.
    Hot air rose and kept top floor too hot.
    He had a return duct...
  45. Replies
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    ---------------------------- All the...

    ----------------------------
    All the characteristics of the 38YDB heat pump in Acrobat pdf format are given at:
    http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/38ydb-4pd.pdf
    ...
  46. Replies
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    6,076

    In a previous post I mentioned that I reduced the...

    In a previous post I mentioned that I reduced the balance point setting from 40*F to 35*F for experimentation.

    Since then, I calculated the additional saving realized by going to 35*. It amounts...
  47. Replies
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    3,267

    Never had 80% RH in crawl space. House located...

    Never had 80% RH in crawl space.
    House located just 1/2 mile North of U.S. border at Blaine Washington (your Pacific Northwest).

    Mods are still work in progress. All vents, except the one used by...
  48. Replies
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    4,169

    Do the simpler stuff first: Are windows...

    Do the simpler stuff first:
    Are windows double-glazed? Storm windows help and convert single glazed windows to double-glazed ball park.
    How much insulation in ceiling/attic? Can you add some?
    Any...
  49. Replies
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    573

    I sent you an e-mail by guessing your address....

    I sent you an e-mail by guessing your address.
    Covered crawlspace improvements. a lot of info is Do it yourself; a no-no here!
    will send info on heatpump in a couple of days.
  50. Replies
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    I had the opportunity to do just that a couple of...

    I had the opportunity to do just that a couple of days ago.
    We had foggy weather with 100% relative humidity just above 35*F.

    I dropped the balance point temperature from 40*F to 35*F and jacked...
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