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  1. In essence, yes. We found that if R, C terminals...

    In essence, yes. We found that if R, C terminals were not powered, no go. Carrier local tech support helped us, suggest you engage them - each application has it's unique issues.
  2. Ran into something similar on same product. Our...

    Ran into something similar on same product. Our situation was originally created by retrofit where existing control wire only had three wires available. It later became evident that this condenser...
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    California also - welcome aboard.. gotta ask...

    California also - welcome aboard.. gotta ask though, of all the questions you could ask as your #1 inquiry, I'm surprised you picked that one?
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    Years ago Honeywell had cool demo's of Electronic...

    Years ago Honeywell had cool demo's of Electronic Air Cleaners scrubbing smoke out of a plexiglass box, very impressive. Real world I'm still waiting to reproduce results that good. Put an EAC in my...
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    Bill is less than I'm paying in Calif - but we're...

    Bill is less than I'm paying in Calif - but we're on propane. 253 therms does seem like fairly high consumption, given the tight construction and 90% furnace. The air to air heat exchanger could be a...
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    A cabinet mounted heat pump is a popular...

    A cabinet mounted heat pump is a popular alternative for hotels/condos/apts because it potentially lowers initial cost of initial installation. Placing a condensing unit on a balcony is generally not...
  7. Thread: New truck

    by dougvhvac
    Replies
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    5,587

    Nice truck - but I really like the one in your...

    Nice truck - but I really like the one in your avatar! Is that rock trail on the Rubicon?
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    Here's a study that also links to the work of...

    Here's a study that also links to the work of several others regarding UV lights: http://aem.asm.org/cgi/content/full/67/8/3712

    Seems like the real question is whether these lights produce an...
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    I had a similar experience learning about the...

    I had a similar experience learning about the respect one must give 480/3 power. As a tech apprentice I was logging leg voltages on a routine PM for a school, working in an equipment room with...
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    Dehydrated cat. Call had been run several times...

    Dehydrated cat. Call had been run several times on poor airflow downstairs. Finally service manager goes out to site, pull apart coil case (upflow in garage) - finds a dead cat on coil. Also helped...
  11. You might contact Dependable, although they are...

    You might contact Dependable, although they are in Dixon it's possible they installed the system. Another is Greiner's, same town. Closer to you is ABC in Concord - or Ideal, same town. If you call...
  12. Thread: UV Lights

    by dougvhvac
    Replies
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    40,615

    Bowhunter - you did not say why you were...

    Bowhunter - you did not say why you were considering a UV install. Although my esteemed colleagues have reservations regarding UV efficacy I'm sold on the value. Previously I was very skeptical. In...
  13. If California didn't take home the grand prize...

    If California didn't take home the grand prize for tort capital of the US then we deserve a lifetime achievement award. They even invent new forms of litigation to roll out when the old ones get...
  14. Purchasing would take good advantage of your...

    Purchasing would take good advantage of your previous exposure to various areas of the trade. Larger shops can justify a safety guy, or add it to other responsibilities. Marketing manager is a great...
  15. Thread: The old man

    by dougvhvac
    Replies
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    1,069

    That's a great visual - my wife's dad did the...

    That's a great visual - my wife's dad did the same for my boys when they were younger, as my grandfather did for me. Your story put me right back on Lake Henshaw, pulling in perch while my...
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    If it were not for the 'wise a**' factor this...

    If it were not for the 'wise a**' factor this board would be a pretty dull place!
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    While I'm a big believer in staying positive, I'm...

    While I'm a big believer in staying positive, I'm also a smart enough sailor to read the weather forecast before heading offshore. Small craft advisory usually means stow all your gear and hang on to...
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    Whenever we find high return air intake noise -...

    Whenever we find high return air intake noise - it's usually because the design exceeded the 500 fpm velocity threshold. With 3 tons = 1,200 cfm.. and connected to a couple of 14"x14" returns, seems...
  19. Whenever we ran loads for new construction in the...

    Whenever we ran loads for new construction in the Oakland/Bay area region I was always surprised how the cooling would be sized larger than I would predict. Sounds like your place will be well...
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    I'd have to agree with Tinner about the brands,...

    I'd have to agree with Tinner about the brands, and install being critical also. Did both offer to pull permits? Since it's commercial lease space the intention is usually to control unexpected...
  21. If you go with a radiant type, you'll probably...

    If you go with a radiant type, you'll probably need more than one, or go with a tube version. I've put both in - the tube ones are pretty cool. One huge benefit with radiant is that very shortly...
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    Pulled one out when I first got in the trade,...

    Pulled one out when I first got in the trade, very unusual unit. We had been warned about the ammonia being 'bad' stuff, certainly worth remembering if you end up working on it or removing it. The...
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    Had it here in California for many years. Started...

    Had it here in California for many years. Started with just a few regions, now it's pretty much universal. Never heard of a problem with wet failure, other than what occurs on initial start up if...
  24. Replies
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    That deal sounds better than any I've seen on the...

    That deal sounds better than any I've seen on the west coast, and I've been looking quite a while. Having the support of the franchise resources behind you would be great too. Be sure to check the...
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    Might want to investigate how new customers are...

    Might want to investigate how new customers are acquired. Big drop in revenue - are marketing dollars down by same percentage? I'm seeing similar deals on West Coast.. the dollars spent on marketing...
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    You don't hear too much about it, but radiant...

    You don't hear too much about it, but radiant barrier sheeting is inexpensive and quite effective. It's a bonded foil on the underside of the plywood sheeting (installed at mill) that underlays the...
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    Finally began to understand this AIG mess this...

    Finally began to understand this AIG mess this week: It's as if you sold several thousand extended system warranties, paid the insurance vendor, and expected that if anything failed they'd reimburse...
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    When training is being offered do you compensate...

    When training is being offered do you compensate the employee for attending classes?
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    If they didn't quote a variable speed indoor unit...

    If they didn't quote a variable speed indoor unit I'd sure ask them to give that alternate as well. I have a two stage in one zone and a variable in the other - no comparison, the variable is...
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    One approach would be to consider the assets at...

    One approach would be to consider the assets at fair market value (today) and then place a value on the 300 customers at what it would cost you find 300 new clients if you didn't purchase the biz....
  31. Another one to check with would be Stan S. over...

    Another one to check with would be Stan S. over at Oregon Heating and Cooling.
  32. Replies
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    1,434

    Fan speed set on high? For both cooling and...

    Fan speed set on high? For both cooling and heating? Or was cooling on high and heat on low (typical)?

    You have verified just about every conceivable parameter except static pressure - which would...
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    Sorta makes you wonder - I've always thought the...

    Sorta makes you wonder - I've always thought the big 'three' that everyone needs universally were; food, shelter and clothing. We grow the food, produce the clothing, and hopefully build the housing....
  34. Reading Allan38's post reminds me that in the...

    Reading Allan38's post reminds me that in the HVAC business we face two big challenges, being technically competent and also being sharp enough at marketing to keep the dispatch board full. The past...
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    Initially I thought UV lights was bunk science....

    Initially I thought UV lights was bunk science. Then I inherited a customer from another shop that had a full Lennox system change plus filtration and UV lights installed. He called to request new...
  36. Thread: Introduction

    by dougvhvac
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    1,743

    Welcome Toddfather.. a couple questions for you -...

    Welcome Toddfather.. a couple questions for you -

    1. Have you any experience with CO2 as a refrigerant? I'm hearing BMW is switching to this, but I'm curious to know how the application works....
  37. Code in Florida could certainly be different than...

    Code in Florida could certainly be different than it is in California, but I believe that a combination of 'high' and 'low' vents allows the ratio to go to 300:1, the idea being that rising heat...
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    Check the ductwork too - poor recovery can be a...

    Check the ductwork too - poor recovery can be a result of a loose connection, attic air infiltration.
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    Refrigeration effect seems really poor, I'd look...

    Refrigeration effect seems really poor, I'd look for a clogged screen upstream of the metering device. Although I've always questioned the diagnosis in the past - I've had guys change out the evap...
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    Short cycle problem?

    I'm trying to help my son remote diagnose this problem in his loft in L.A. - usually I can spot the trouble but this one is pretty weird. He's got a fancoil in his exposed attic, does dual duty as...
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    There is an interesting transformation that...

    There is an interesting transformation that occurs when unregulated nitrogen goes full pressure into the manifold - but I wouldn't recommend it!
  42. Replies
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    FWIW - here's my suggestion: Call the office on...

    FWIW - here's my suggestion: Call the office on Monday morning, sometime after 10:00 a.m. Calmly ask to speak to the manager, tell them you're a customer from over the weekend. Let him know that you...
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    Any 2 story home always works better with zoning,...

    Any 2 story home always works better with zoning, but variable speed is amazing. I was not sold on it till I put it in my house, but I made one mistake. For the Master Bed zone I just used a 2 stage...
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    With nat gas available, a sweet setup would be a...

    With nat gas available, a sweet setup would be a 90+ variable speed fau in the attic, run the intake air and flue to gable end (no roof penetration) and locate a tankless water heater in the same...
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    10,020

    Near Forest Hill or Baltimore? Heard of BlueDot?...

    Near Forest Hill or Baltimore? Heard of BlueDot? Might check those guys - it's summer, could be busy. Ask for Tim or Jeff.
  46. Thread: hepa vs eac

    by dougvhvac
    Replies
    11
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    2,369

    I'm curious to know more about this. Did the...

    I'm curious to know more about this. Did the EAC's have airflow switches? Could you smell ozone? I know there is some discussion about whether they are harmful or not..
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    Carrier HDR is a nice unit. They were just about...

    Carrier HDR is a nice unit. They were just about mandatory in Newport Beach because of low sound requirements the city had in place. Tonnage sounds right for the s.f. and San Diego.
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    Would definitely want to confirm drains indeed...

    Would definitely want to confirm drains indeed are clear and flowing. Depending on drain trap configuration the air turbulence at the coil drain outlet could be splashing condensation and creating a...
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    With an attic having generous room, you could...

    With an attic having generous room, you could probably go conventional, skip the whole 'hi pressure' system thing. The stacked closets could help with a descending trunkline to the subfloor, giving...
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    Possibly the new coil/txv is non-bleed, meaning...

    Possibly the new coil/txv is non-bleed, meaning freon pressures equalize very slowly after unit shuts off. The result is that the compressor on restart then faces a bigger job in overcoming residual...
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