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  1. Replies
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    Part 2!

    Continued!

    https://lh5.googleusercontent.com/-CulRllz01NE/UUs3KeF054I/AAAAAAAAMhc/JjZThr7vZOI/s1197/IMG_20130321_123337.jpg
    1 of the 3 Carrier Evergreen Chillers.

    ...
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    New VCU Medical Education Center

    Had a unique opportunity to recently tour mechanical spaces of the new McGlothlin Medical Education Center on the Virginia Commonwealth University campus, and I thought you guys might like to see...
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    [I know this is an older thread, but I just...

    [I know this is an older thread, but I just looked at it for the first time since January]

    Hey, I went to school there for 3 years! Lake Braddock was a fun place. I really got interested into HVAC...
  4. Thread: bonus room

    by york_hvac
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    We have a bonus room over our garage too. It...

    We have a bonus room over our garage too. It doesn't get too hot in the summer but in the winter it is freezing. Our main AHU won't keep this room warm in the winter, even though the room next to it,...
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    Wow, thats cool DeltaT! I remember you told me...

    Wow, thats cool DeltaT! I remember you told me you used to work in the Northern Virginia area when I posted something about Lake Braddock Secondary. Did you ever do any work for that school? Ever...
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    Sweet, I love Linux :D

    Sweet, I love Linux :D
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    I'm glad you guys like the pics :) This is the...

    I'm glad you guys like the pics :)
    This is the only building High School in Loudoun County, VA that still has working pneumatic controls. I have no idea how they interface it with the EMS system....
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    38YCC is one of Carriers older "cube" Heat Pumps....

    38YCC is one of Carriers older "cube" Heat Pumps. I have the 38EYG, which is the 13 SEER, Puron Model.
    The "banding" of frost also happens on my unit. Frost always appears at those two spots first. ...
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    Old Johnson Controls Pneumatics

    Over the summer, and friend and I were surveying a sound system, and I thought these old HVAC controls looked cool, so I took a few photos for you guys.

    Here are two of the AHU's that they...
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    So you have the Aprilaire 5000 right before your...

    So you have the Aprilaire 5000 right before your indoor unit? If this is the case, it should be the only filter. It is safe to remove the 1" filters at the return inlets. If this is new construction,...
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    I believe you can. There is an "EAC" terminal on...

    I believe you can. There is an "EAC" terminal on the Infinity Control Board that supplies 115 VAC whenever the blower is opperating. Not sure if Clean Effects needs high or low voltage to opperate.
  12. Hmmm, 3M, must be that new 99.9% efficient filter...

    Hmmm, 3M, must be that new 99.9% efficient filter I have been hearing rumors about huh?:rolleyes:
  13. Replies
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    I understand, and every area is different, but...

    I understand, and every area is different, but that is the way that my unit was sized. So I was just trying to provide a refrence point. By the way, Im in Northern Virginia.
    74 isn't cold at all,...
  14. Replies
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    What kind of thermostat do you have? Is anybody...

    What kind of thermostat do you have? Is anybody else home during the time you were at work? Even if you set the thermostat is set for 74, the temperature is not going to magically drop from 83 to 74....
  15. I have two Carrier Infinity Systems (the same...

    I have two Carrier Infinity Systems (the same thing as Evolution), and love them. The User Interface is VERY nice.
    Proper installation is key to any HVAC system. Find a contractor who is willing to...
  16. Payson, This reminds me of the time you serviced...

    Payson,
    This reminds me of the time you serviced this Rheem condensor, remember???
    http://www.hvac-talk.com/vbb/showthread.php?t=75253&highlight=Rheem

    :D

    -york_hvac
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    Ok, so I took some photos of the space like I...

    Ok, so I took some photos of the space like I said I would



    Here, you can barley see two of the returns located high on the wall at the back of the Auditorium....
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    Ha, I WISH we had Catwalks! That would be...

    Ha, I WISH we had Catwalks! That would be AMAZING! But no, sadly we don't have any. And our spotlight opperators are at floor level

    And I agree with the CO2 ventilation control being needed. Right...
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    Thanks for all of the replies guys, I really...

    Thanks for all of the replies guys, I really appreciate it!

    I got some more info. The model number is actually 39ED2919867, can anybody descipher it?. On the unit, it says "Component Assembly...
  20. If you are looking for quiet, the scroll is the...

    If you are looking for quiet, the scroll is the way to go. The reason some people like the recip more is because it is staged at 50/100 vs 67/100 for the scroll, which allows for longer run times and...
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    For the 3 stages to work properly, you must have...

    For the 3 stages to work properly, you must have the "-B" revision of the Infinity/Evolution control.
  22. Replies
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    Thanks for all of the suggestions guys, yes, I...

    Thanks for all of the suggestions guys, yes, I realize that an issue like this cannot be diagnosed over the internet, but thanks again for the general ideas, please keep them coming if there is...
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    Thanks for the replies guys. Yes, it is in fact...

    Thanks for the replies guys. Yes, it is in fact air noise coming from the diffusers, no mechanical noise transmission.
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    Auditoriums and HVAC Design

    Hi guys,

    I am just interested in your opinions on how an HVAC system should be designed for a theater space, and what is done to keep sound levels to a minimal. I am not in the HVAC trade, but I...
  25. Like others have said, I think your bill would be...

    Like others have said, I think your bill would be lower if you had a thermostat with a smart recovery or similar feature. With your stat now, it is probobly commanding the Aux heat strips to come on...
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    1. Do the rooms that have a 3-5 degree difference...

    1. Do the rooms that have a 3-5 degree difference have dedicated return air ducts to them? You probobly won't get the temperature exactly the same as the t-stat, because of factors like windows, room...
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    Hey Dash, why is the 005 unit more efficient in...

    Hey Dash, why is the 005 unit more efficient in heating?
  28. Replies
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    The delay on ignition is perfectly normal, lets...

    The delay on ignition is perfectly normal, lets the heat exchangers warm up before the air starts to get circulated. You can't change it, thats just the way its programed.
    Same goes for the check at...
  29. Replies
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    I see, I thought the OP was talking about a...

    I see, I thought the OP was talking about a seperate line voltage disconnect for the strips.

    I too like it cold at night, but my Infinity Control has Smart Recovery, it helps by increasing the...
  30. Yes, you can use the Infinity Control with that...

    Yes, you can use the Infinity Control with that model. The advantages are that you will have a fully communicating system, requiring only 4 wires between each piece of equipment. You will be able see...
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    You also wouldn't want to add a manual switch to...

    You also wouldn't want to add a manual switch to the strips because you will get cool supply air when the heat pump goes into defrost mode.
  32. Thread: Megahack!

    by york_hvac
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    Yeah Payson, that job would have been like heaven...

    Yeah Payson, that job would have been like heaven compared to some of the old attics you have crawled/weasled into. :D
  33. Replies
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    While normally an Infinity Furnace would be...

    While normally an Infinity Furnace would be installed with the Infinity control, it is NOT required, it will work with a standard thermostat. I wouldn't want mine like that, but it is possible. If it...
  34. Thread: Megahack!

    by york_hvac
    Replies
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    Well it looks a LOT better now! Guess you like...

    Well it looks a LOT better now!

    Guess you like making your own traps for drain lines?
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    I have an account on http://www.imageshack.us/...

    I have an account on http://www.imageshack.us/ and when I upload photos, I resize them to 640x480(For Message Boards)

    To put the photos in a post, get the "Direct Link" URL and put "IMG tags...
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    Roboteq, You may already know this, but the...

    Roboteq,
    You may already know this, but the overcooling feature for dehumidimication can be disabled, and controlled only by the variable speed blower.
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    http://img408.imageshack.us/img408/867/boiler10ag8...

    http://img408.imageshack.us/img408/867/boiler10ag8.jpg

    http://img408.imageshack.us/img408/3451/boiler11qi4.jpg

    http://img408.imageshack.us/img408/7348/boiler12pg0.jpg
    ...
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    http://img252.imageshack.us/img252/41/img002ad7.jp...

    http://img252.imageshack.us/img252/41/img002ad7.jpg

    People will be able too see it better now. :)
  39. Agreed. Thats the most important step. You're...

    Agreed. Thats the most important step. You're better off having a well sized, designed, and installed system, than worry about brand alone.
  40. The great thing about 3 stages is that you can...

    The great thing about 3 stages is that you can you use low, medium, and high when you need them, not just get one full blast of heat per cycle. Plus, it is a great match up with the Performance unit...
  41. When my house was being built, we paid to have...

    When my house was being built, we paid to have the installing HVAC company add ducted returns to each room. Pricey, but doors are now not affected by the air pressure from the central return, and the...
  42. Carrier does make a two stager with a scroll...

    Carrier does make a two stager with a scroll compressor, but the staging is 60something % and 100%. The reciprocating is 50/100%, which makes for better humidity control.
  43. I have 2 Infinity systems, one is a Furnace/AC...

    I have 2 Infinity systems, one is a Furnace/AC combo, and the other is Heat Pump/Variable Speed Air Handler. I love both of them. The controller/thermostat is really what seperates the Infinity...
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    Gottcha. Wasn't really looking for any DIY stuff...

    Gottcha. Wasn't really looking for any DIY stuff or anything, I was just curious on the general opperation of a Pulse, and why its called that in the first place.
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    Not at all. Thats the way I have always done it.

    Not at all. Thats the way I have always done it.
  46. Replies
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    A little off topic, but can someone please tell...

    A little off topic, but can someone please tell me how exactly a Pulse Furnace works? What makes some people like them so much, and others say replace them? Any PDF links or anything?

    Thank You!
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    I have 2 Infinity systems, I run the fan 24/7,...

    I have 2 Infinity systems, I run the fan 24/7, except at night on one system, since no one is downstairs at night. The programable fan is great, lets you program it to change speed per each period,...
  48. Ah, I know what you mean. ;) I've got a powered...

    Ah, I know what you mean. ;) I've got a powered one thats wired correctly.
  49. I have actually had the same problem as you, this...

    I have actually had the same problem as you, this happened for a month or two, then stopped. Not sure why, but it doesn't happen anymore...
    The humidifer needs to be wired to the HUM and C terminals...
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    Infinity NIM is only needed when a non-Infinity...

    Infinity NIM is only needed when a non-Infinity HP is used, or non-Infinty 2 speed AC/HP. Single speed AC does not need NIM to work.
    Also needed to control HRV/ERV through the Infinity Control.
    If...
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