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  1. Thread: VRV Residential

    by mchild
    Replies
    5
    Views
    569

    I installed the 4 ton Daikin VRV-S II system in...

    I installed the 4 ton Daikin VRV-S II system in my home in late 2008. The home is an old farm house with a couple of additions (3,100 sf) so there is a fair amount of diversity between the four zones...
  2. Looking for contractor on the North side of Pittsburgh

    I checked the contractor locator map and did not see much. Sis-in-law and family are getting ready to move into new construction and are looking for a top notch HVAC contractor to look over the new...
  3. Replies
    2
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    537

    And one other thing. The reason they keep the...

    And one other thing. The reason they keep the blower running is probably because the room temp is monitored by a return air temp sensor. So they must keep the air moving over that sensor. If you...
  4. Replies
    2
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    537

    While I'm not real familiar with LG, most, if not...

    While I'm not real familiar with LG, most, if not all, of these systems have the indoor blower running all the time. So even when an indoor unit has satisfied the temp, the blower will stay running...
  5. Use something like this in your filter grille:

    Use something like this in your filter grille:
  6. Replies
    12
    Views
    2,896

    I originally thought it would work to control...

    I originally thought it would work to control multiple indoor units with only one of the older style controllers (BRC1D71). I have since stepped up to having individual controllers for each indoor...
  7. Replies
    12
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    2,896

    Okay, I think that might be stretching it a bit...

    Okay, I think that might be stretching it a bit to call that an Auto function. I thought on that unit you got the fan to go off when the call was satisfied by simply using regular Field Codes...
  8. Replies
    12
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    2,896

    In looking at the KRP board schematics I had the...

    In looking at the KRP board schematics I had the thought that the humidifier terminals might work that way. Here is why I decided to go with separate stats - my home is an old farm house and...
  9. Replies
    12
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    2,896

    I guess I'm not completely sure what the Auto fan...

    I guess I'm not completely sure what the Auto fan function on the P series air handler does. Does it not change the blower speed as the load in the space changes? Yes, I know Mitsu has Auto fan but...
  10. Replies
    12
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    2,896

    I installed my VRVII-S in the fall on 2008, so I...

    I installed my VRVII-S in the fall on 2008, so I have now lived with it through several cooling and heating seasons. Like you I have the 4 ton system with three 18K indoor units and one 9.5K indoor...
  11. I think you must be referring to the button lock...

    I think you must be referring to the button lock function. Here it is: 298631
  12. Is this what you need?298601

    Is this what you need?298601
  13. Replies
    26
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    5,939

    According to the extended data the 3 ton has a...

    According to the extended data the 3 ton has a minimum cooling capacity of 12,890 BTU (11,010 Sensible) at 63*WB indoor and 95*OAT at 500 CFM. Interestingly the 2 ton unit is not much different, BUT...
  14. Replies
    25
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    2,155

    COP = Co-Efficient of Performance with 1:1 being...

    COP = Co-Efficient of Performance with 1:1 being a COP of 1 or number of units of output for every unit of input. A COP of 3.5 is a higher level of operating efficiency than a COP of 3.1 (note: 3:1...
  15. Replies
    19
    Views
    2,036

    What blower speed do you set the on indoor unit...

    What blower speed do you set the on indoor unit when you use the Fujitsu?

    I have a Daikin system and it has the ability to set the target evap coil temp. If your Fujitsu has a similar setting...
  16. Replies
    5
    Views
    987

    If your Zuba system is similar to most all other...

    If your Zuba system is similar to most all other Japanese systems the indoor blower will cycle off during periods of defrost.
  17. Replies
    19
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    1,631

    Here is a link to the .pdf of the owner's manual...

    Here is a link to the .pdf of the owner's manual for that controller. It should answer most if not all of your questions, but if you still have questions feel free to ask.
    ...
  18. For one Japanese manufacturer they reported for...

    For one Japanese manufacturer they reported for their VRF system (Variable Refrigerant Flow) with an inverter compressor that the energy required at 50% load was 30% of the energy required at full...
  19. atomic- The better approach is to tighten the...

    atomic-

    The better approach is to tighten the envelope of your home so the cooling and heating you are pumping into it stays. Have an energy audit done, which will identify where your home is...
  20. Replies
    14
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    10,313

    These systems are designed to have a 25 year...

    These systems are designed to have a 25 year life. Many of the issues causing problems with conventional heat pumps have to do with ducting and air flow issues as it is the one area that is the...
  21. I have an 1800s farm house with an open air crawl...

    I have an 1800s farm house with an open air crawl space under the oldest part of the home. The second story had high-hats and pull down stairs which allowed air to flow from the crawl up through the...
  22. Replies
    14
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    10,313

    One other item that I forgot to mention in my...

    One other item that I forgot to mention in my earlier post. Even though you will not finish the room over the garage until later, you would have several options with a VRV/VRF system. You could...
  23. Replies
    14
    Views
    10,313

    Read my post above yours. Small ducted air...

    Read my post above yours. Small ducted air handlers are available with the VRV/VRF systems in capacity ranges of 6,000 to 48,000 BTU. Each A/H will be a zone that is independent of the A/H.
    ...
  24. Replies
    14
    Views
    10,313

    Any system from Asia is often referred to as a...

    Any system from Asia is often referred to as a mini-split when in fact that refers to the smaller capacity systems below a typical conventional split system of about 1.5 tons.

    Each of the major...
  25. ted, If you have not already done so you may...

    ted,

    If you have not already done so you may find some info if you search this board for Aeroseal and former board member dash. He was an Aeroseal dealer and posted about it frequently.
  26. Replies
    23
    Views
    1,350

    In many cases there is insulation between the...

    In many cases there is insulation between the garage and the bonusroom but the insulation is laying on the back side of the drywall of the garage ceiling. With this situation there is often an air...
  27. Thread: DAIKIN FXMQ

    by mchild
    Replies
    2
    Views
    1,183

    All Daikin equipment require the use of their...

    All Daikin equipment require the use of their proprietary controls. This particular Daikin equipment is highly communicating between all other indoor units, the outdoor unit(s), branch selection...
  28. Replies
    13
    Views
    1,232

    Freddy, Stop here for a minute and think this...

    Freddy,

    Stop here for a minute and think this through. The developer of the drawing of the proposed duct system has shown the CFM deliveries in the various rooms of the home (apparently bathrooms...
  29. Replies
    3
    Views
    1,872

    There are a number of products that could meet...

    There are a number of products that could meet your requirements but without knowing the details of what those requirement are it would just be a guess at this point. Trying to figure this out now...
  30. Replies
    3
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    1,872

    You will need to provide some additional info. ...

    You will need to provide some additional info. What are the winter design temps for indoor and outdoor? Where and who came up with the 40K BTU requirement? Why do you need four indoor units?
    ...
  31. These ducted units are totally concealed when...

    These ducted units are totally concealed when installed - just as an indoor unit of a conventional heat pump or gas hot air furnace is. They are just much smaller in size and look a bit different. ...
  32. GCs normally know squat about HVAC so he will...

    GCs normally know squat about HVAC so he will just turn to the low bidder (he probably already knows him) and tell him to slap something in. As in cheap.

    Each of the major Japanese manufacturers...
  33. Replies
    38
    Views
    3,261

    paul42's history on this site is well documented...

    paul42's history on this site is well documented with a registration date of 2001. Many of his postings had to do with construction issues as the home was being built. The sizing of his system was...
  34. Everything that is a rated match is listed here:...

    Everything that is a rated match is listed here:
    http://www.ahridirectory.org
  35. Replies
    9
    Views
    1,201

    Check out the Mitsubishi H2i series of heat...

    Check out the Mitsubishi H2i series of heat pumps. They produce 100% of rated output at 5*F and 87% of rated output at -4*F. They have both ducted and ductless indoor units available.
    ...
  36. The VRV line is listed under the commercial and...

    The VRV line is listed under the commercial and residential area of the Daikin site. The VRV-S is the smallest capacity systems and is suitable with single phase electric as we have in homes. There...
  37. Yes, the Westinghouse (Nordyne is the parent...

    Yes, the Westinghouse (Nordyne is the parent company) HP is out and has positive reviews. Carrier has just introduced their inverter driven system (HP and A/C) and Daikin's VRVIII-S is available now...
  38. Were you possibly clamping onto the air handler...

    Were you possibly clamping onto the air handler circuit breaker leads and not the outdoor unit?
  39. Replies
    8
    Views
    1,266

    Since this system has an inverter driven...

    Since this system has an inverter driven compressor it will be operating much more than a conventional system as it modulates its speed to the load. If there is little stand by time there is little...
  40. May want to check with Sanyo and see if you could...

    May want to check with Sanyo and see if you could use recessed units with their 4:1 2 ton outdoor. Not all the combinations are advertised. I think RoBoTeq from this board is a distributor for...
  41. Can't use a small ducted units? If you could...

    Can't use a small ducted units? If you could that could get you two indoor units with a single outdoor. Or under the Mitsu line that I suggested in post #5 their 2 ton unit can handle 3 indoor...
  42. This is Daikin's global site and not all of these...

    This is Daikin's global site and not all of these units are available in the US. I don't know that Daikin has specifically what Agent C is inquiring about.

    Mitsubishi has the outdoor MXZ multi...
  43. Replies
    15
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    2,527

    A properly installed system whether York, AS or...

    A properly installed system whether York, AS or any of the others will be quiet. Unfortunately, when even the most basic steps are skipped such as taking static pressure readings, you have to wonder...
  44. Replies
    15
    Views
    2,527

    gwilburn, Variable speed air handlers are...

    gwilburn,

    Variable speed air handlers are designed to provide the set CFM in air flow. Prior blowers just ran at a set speed (not CFM) and if the duct system was too restrictive then the proper...
  45. Replies
    2
    Views
    1,186

    I believe the controls for Dry mode with the...

    I believe the controls for Dry mode with the Mitsu units are similar to the way Daikin controls theirs. When dry mode is selected the unit will attempt to maintain the temp in the area at the time...
  46. Some people do a before and after audit to...

    Some people do a before and after audit to confirm that the installers did a proper job and the window, as an example, don't leak like a sieve.
  47. Same lousy builder, same lousy HVAC...

    Same lousy builder, same lousy HVAC sub-contractor, same lousy duct design (or lack of any real design), same lousy installers. Cookie cutter houses with consistent problems from one to the next. ...
  48. Replies
    8
    Views
    685

    Sure post away. I'm sure someone will be...

    Sure post away. I'm sure someone will be familiar with what you have.
  49. There could be lots of reasons such as the 4 ton...

    There could be lots of reasons such as the 4 ton system had a failing compressor due to lack of air flow across the indoor coil which allowed for liquid refrigerant to flow back and slug the...
  50. It would probably be better to drop the box...

    It would probably be better to drop the box altogether as it is only adding to the return side static pressure. Run the 18" to each filter grille and make sure the flex is pulled tight and any turns...
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