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Type: Posts; User: acwizard

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  1. Replies
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    Greenheck does offer them. The controls are mfg....

    Greenheck does offer them. The controls are mfg. by Melink.The system works well if there are low periods of activity on the cook line during slow times of the day.
  2. The objective of using a mini-split is to improve...

    The objective of using a mini-split is to improve efficiency. By trying to add inline fans or boosters is in contradiction of what you are trying to save.
  3. You can count me in.

    You can count me in.
  4. It would be helpful to know what system you have....

    It would be helpful to know what system you have. This information can be located on the printed circuit board.You more than likely have a DIGI3U or a DIGITRACT 4. Your damper motor has probably been...
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    With FSK ductwrap it is not as simple just to add...

    With FSK ductwrap it is not as simple just to add more insulation over the top of the bottom layer. The reasons are the fact you will create a dual vapor barrier with the possibility of trapping...
  6. Replies
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    2,368

    There is more to insulation then just the...

    There is more to insulation then just the thickness. You need to know the density of the fibers. Also when installing ductwrap care must be exercised to avoid overstreching which compresses...
  7. I am quite familiar with Zonex. If I understand...

    I am quite familiar with Zonex. If I understand you corectly you have two zones. One feeds upstairs and the other downstairs. You should have two thermostats. How large are the dampers, are the...
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    1,691

    DOAS= dedicated outdoor air systems. ERV are...

    DOAS= dedicated outdoor air systems. ERV are often build into these units.
  9. Replies
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    1,691

    Even though the makeup is in the kitchen...

    Even though the makeup is in the kitchen additional makeup air must be added to compensate for combustion air and exhaust from the pizza oven.This can be accomplished by design of total restaurant...
  10. Replies
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    1,691

    A actual pizza oven would not generate any btus...

    A actual pizza oven would not generate any btus that are of significant to the a/c load. However the makeup air and the exhaust required to operate the oven would need to be considered. Combustion...
  11. Replies
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    3,639

    Installed a few and they work great.They can be...

    Installed a few and they work great.They can be easily removed for cleaning and company logos can be stenciled onto them as well.The soft start is good advise. There are lots of choices in their...
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    Are you looking to replace it. I assume you do...

    Are you looking to replace it. I assume you do not know the mfg.One can determine the size by knowing the horsepower , blower wheel size, and rpm.
  13. Look into Liebert or Data Aire. These mfgs....

    Look into Liebert or Data Aire. These mfgs. specialize in computer data rooms a/c equipment.
  14. A lot of great advise given. Have been involved...

    A lot of great advise given. Have been involved with a few. There are so many issues that need to be addressed. A great understanding of psychrometrics will give you the results you need for a proper...
  15. Replies
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    812

    Please review AOP Forum rules before posting...

    Please review AOP Forum rules before posting advice in AOP Forums.
  16. Replies
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    2,550

    Thats not totally correct. 3000 cubic feet is...

    Thats not totally correct. 3000 cubic feet is needed for complete combustion and proper venting in a natural draft appliance. It is about half in an induced draft appliance. So part of the air is...
  17. I like your creativity. I've been doing solar...

    I like your creativity. I've been doing solar thermal systems since the early 1980s. My only concern is in the event of stagnation your collector temperatures could easily exceed 200F. I first got...
  18. Replies
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    2,550

    The number is approx. 30 cubic feet of air...

    The number is approx. 30 cubic feet of air required per 1000 BTUH.
  19. Replies
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    1,489

    I am not here to debate that yes draft is...

    I am not here to debate that yes draft is important along with stack temperature.The average homeowner is not going to have the means to determine if the draft is correct. I would never make a...
  20. Replies
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    1,489

    Venting combinations are determined by venting...

    Venting combinations are determined by venting tables published by GAMA(gas appliance mfg. association) and the National Fuel Code. As mentioned before if not done correctly can be hazardous or...
  21. Thread: New System

    by acwizard
    Replies
    4
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    417

    The first step would be to address the building...

    The first step would be to address the building envelope. By sealing up leakage around windows, doors and insulating will reduce infiltration into your home. This will reduce the size of the...
  22. Replies
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    2,679

    I am not sure where you get that the ideal...

    I am not sure where you get that the ideal pressure is 0.5. All fans have a fan curve that compares static, cfm, and hp. The ideal static would be when the fan is operating at its most efficient...
  23. Thread: makeup air

    by acwizard
    Replies
    21
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    3,403

    There are some flaws already in your design. If...

    There are some flaws already in your design. If you are wanting to bring in 100% osa and there is 12 tons of cooling, 2500 cfm is not enough air moving across your evaporator. No you can not use a...
  24. What is the model of the equipment in question....

    What is the model of the equipment in question. How long is the lineset and is the indoor unit at a higher elevation then the outdoor unit. Very rarely will you be able to get a contractor to replace...
  25. Wolfstrike, I second you on this one. You were...

    Wolfstrike, I second you on this one. You were referring to the Caltrans project for the new bridge in the bay area. With so many people out of work in this country and the goverment looking for ways...
  26. Replies
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    Electric space heating is not an approved method...

    Electric space heating is not an approved method of heating in Calif. Heating is required by building codes. Spacepak or a Unico heat pump may work for you, or even Mitsubishi or a Fujitsu mini split...
  27. Replies
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    1,917

    I would not even think of using a tankless water...

    I would not even think of using a tankless water heater for your application. The maintenance cost of descaling the heat exchanger and additional repairs makes it not practical. Look into a Munchkin...
  28. Fresh air and proper ventilation has been...

    Fresh air and proper ventilation has been determined by ASHRAE 62.1
  29. Do not concern yourself with the sightglass on a...

    Do not concern yourself with the sightglass on a 410 system.
  30. Replies
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    They are both very good products. You will need...

    They are both very good products. You will need to know the heat loss calcs for each room , Once that is determined then selection of the radiators can be chosen.
  31. Replies
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    I tried to read through all of the threads and...

    I tried to read through all of the threads and nowhere did anyone mention that with the high static comes the reduced airflow which then results in the seer rating of your equipment to be thrown out...
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    I am not sure what you are asking.Is it safe to...

    I am not sure what you are asking.Is it safe to assume that you are trying to find a way to get more cooling upstairs.
  33. I watch his show anytime I get a chance. I find...

    I watch his show anytime I get a chance. I find it entertaining but not always accurate.The sad thing is that the viewers for the most part do not know the difference.Besides the error of fpm and...
  34. Replies
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    Low voltage condition,defective potential...

    Low voltage condition,defective potential relay,drop out voltage to high, compressor winding values have changed.
  35. Replies
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    5,150

    I would be hesistant to use styrofoam. The flame...

    I would be hesistant to use styrofoam. The flame and smoke spread needs to comply with UL in this application.
  36. Replies
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    Most commercial customers are billed for electric...

    Most commercial customers are billed for electric usage by kw-hrs.and demand. Demand charges are usually based on peak demand and is based on the greatest registered demand in each billing...
  37. Look into Tekmar or Heat-Timer. The differential...

    Look into Tekmar or Heat-Timer. The differential controls are still needed to for the solar side of your equation.
  38. Replies
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    If ventilation is a key concern, which it should...

    If ventilation is a key concern, which it should be, then Mitsubishi makes a product called Lossnay which could be incorporated into the design. If you need some help we are down in Orange County.
  39. Replies
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    How large of a home is this. If your home is...

    How large of a home is this. If your home is larger than 4000 sq. ft then I would definately look into VRF by Mitsubishi or Daikin. The advantage is very short duct runs, higher efficiencies, very...
  40. Replies
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    I do not disagree with sealing up the envelope....

    I do not disagree with sealing up the envelope. But it is obvious that as the heat builds up in the latter part of the day the existing a/c cannot keep up with it. How does one propose to insulate an...
  41. Replies
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    1,331

    Being from southern calif. , My first question is...

    Being from southern calif. , My first question is with the additional sq. footage are you trying to tie this ductwork into existing system. How do you know the existing system is sized correctly....
  42. Replies
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    22,067

    I am going to repeat myself from earlier in this...

    I am going to repeat myself from earlier in this thread. Your equipment is not sized for the extreme weather conditions. The only way you will cool that space is with additional equipment and the...
  43. Replies
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    Using a megger with 1000v is not recommended for...

    Using a megger with 1000v is not recommended for the application you are considering.When testing windings, it is all about comparisions. Being that our company does electrical work as well as a/c,...
  44. Do not confuse an accumulator with a oil...

    Do not confuse an accumulator with a oil separator. Neither is needed. You want the suction line sloping back to the compressor for proper oil return. Install a inverted ptrap at the condensing unit...
  45. Replies
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    You may want to look into Daikin Altherma

    You may want to look into Daikin Altherma
  46. Increasing the speed of the fan will require more...

    Increasing the speed of the fan will require more hp and more amps. Check the ductwork and grills. Static pressure could be the culprit.
  47. Replies
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    I can not speak for all of the others here but it...

    I can not speak for all of the others here but it is wrong to jump on the defense. There are a lot of very smart people on this forum.We are all here to learn. If your idea works for your...
  48. Replies
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    1,136

    The inspector is not correct. I do agree that...

    The inspector is not correct. I do agree that hardpipe is a better way to go. Show the code violation.The engineer may have had a reason for specifying and you just might find yourself reinstalling...
  49. Replies
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    I am a bit confused. 1 1/2 ton compressor, 2 ton...

    I am a bit confused. 1 1/2 ton compressor, 2 ton evaporator, 2 1/2 condenser. Is this an experiment. List all the model numbers of the equipment.How have you determined that the home needs 1000 cfm....
  50. Replies
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    I have never seen a 30 ton rated in SEER, maybe...

    I have never seen a 30 ton rated in SEER, maybe EER. Let her ripe, It certainly will like a bad apple falling from a tree. I will be waiting to see the disaster unfold.
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