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Type: Posts; User: TLY

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  1. Replies
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    Thank you. Was that from MJ 8 AE? TLY

    Thank you. Was that from MJ 8 AE?

    TLY
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    Could someone define "purpose built daylight...

    Could someone define "purpose built daylight windows" for me? If extra windows were placed in a room to gain an added view of a lake, would these windows be considered "purpose built daylight...
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    Is this for all windows? TLY

    Is this for all windows?

    TLY
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    Blinds or No Blinds for Load Calculations

    When doing load calculations, what does Manual J say about blinds for new construction? Arguments can be made both ways whether to include them in load calculations on a new construction. You don't...
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    I have scheduled someone outside of my builder...

    I have scheduled someone outside of my builder and his subcontractors to give our HVAC systems an independent evaluation and to look at the things mentioned in this thread. Thanks everyone for your...
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    The return drop goes up and terminates into a...

    The return drop goes up and terminates into a 10'' x 20'' and goes two directions.

    The supply branches in three directions: 10'' x 13.5'', 8'' x 14', and 8'' x 8''.

    TLY
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    The return duct itself measures 14'' x 24''. ...

    The return duct itself measures 14'' x 24''. Does this pose a cfm restriction? Also, the supply leaving the furnace measures 16'' x 19'' and I am wondering if this is also a restriction. Thanks,
    ...
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    No, no one has looked at this. TLY

    No, no one has looked at this.

    TLY
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    Well the owner of the HVAC company came to the...

    Well the owner of the HVAC company came to the house and we discussed our cooling problems while standing in our 80 kitchen and he said he would redo tho load analysis. I do have a copy of the...
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    Is there any way I can check the size of the...

    Is there any way I can check the size of the piston myself? Maybe I need to have a second company come in and evaluate this stuff?

    The return duct comes down the side of the furnace and then...
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    Thank you. That is a good perspective and a...

    Thank you. That is a good perspective and a possibility because we do have a large walkout basement and many windows in our house. I think you are right in allowing for that possibility and not...
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    That's a good suggestion. I am near Louisville,...

    That's a good suggestion. I am near Louisville, KY. I started doing this a while back and went to the ACCA website and got a list of members. If you or anyone else has a Louisville reference I...
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    Oh, I only can wish that my contractor had such...

    Oh, I only can wish that my contractor had such an approach. I'm afraid they are just going to swap it out and see what we get and I'm sure they will say that existing line will be just fine.

    TLY
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    I'm not sure I'm ready to gut a brand new system...

    I'm not sure I'm ready to gut a brand new system at my expense. We are happy with the upstairs heat pump and it works just fine.

    TLY
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    I believe my indoor coil is rated for 4-5 ton...

    I believe my indoor coil is rated for 4-5 ton capacity. Is it a 4 ton only? With my current setup, I was told it was common practice to have an indoor coil larger than the capacity of the outdoor...
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    This concerns me that the planned fix for my...

    This concerns me that the planned fix for my cooling problems is so rarely a proper solution. Do you have any recommendations for me?

    TLY
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    Uh-hmm, did you read my previous post about my...

    Uh-hmm, did you read my previous post about my contractor and the lottery?:) I need to find some answers outside of my contractor.

    I wasn't so much looking for specific equipment recommendations,...
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    72°. Why do you ask? Hmm, this just...

    72°. Why do you ask?



    Hmm, this just puzzles me. My contractor said the same thing. Could you explain to me how by only changing the outside heat pump from a 3.5 ton to a 4 ton without...
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    I'm trying to look at everything like that...the...

    I'm trying to look at everything like that...the HVAC has been out many times looking and adjusting and they have determined the 3.5 was undersized. They are going to change it to a 4 ton at their...
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    I guess I am confused with need for the exact...

    I guess I am confused with need for the exact equipment to determine the load. For example, the HVAC-Calc program available from this site does not require specific equipment. The two other load...
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    Nobody has said that it can't, but I really do...

    Nobody has said that it can't, but I really do not know. I just assumed the air would be colder...does changing from a 3.5 ton to a 4 ton increase the air flow?

    Currently, on a summer day the...
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    Good point...say the latent gain for each was...

    Good point...say the latent gain for each was 3500 Btuh.

    TLY
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    I was hoping someone could give me an answer like...

    I was hoping someone could give me an answer like "the first three values require a 4-ton unit and a 1-1/8in line, and the last two values require a 5-ton unit and a 1-1/8in line" or "all values...
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    I have been considering a window film...

    I have been considering a window film (3M-Prestige Series, PR 70) to help with our solar heat gain problems.

    TLY
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    Yes, the new calculation came back needing a...

    Yes, the new calculation came back needing a 4-ton unit. I haven't seen this report, but did ask if it was a Sensible + Latent calculation or a 75% Sensible load calculation. The new company said...
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    Seems to me the lineset can be easily changed (I...

    Seems to me the lineset can be easily changed (I can visually see the entire length of the lines to the exterior wall), but I don't know what is involved in changing a lineset. As far as cost, I...
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    I can see where you think this is all rhetorical...

    I can see where you think this is all rhetorical blabber just for the sake of argument...but it really isn't for me. We have very real and significant cooling problems that are going to be corrected...
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    So at what point do they become significant? 5%?...

    So at what point do they become significant? 5%? 10%? 15%?

    The chart on page 45 that I referenced had a capacity reduction range between 3-22% when using a smaller than optimum suction line. The...
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    Not to be picky, but the volume of the 1 inch...

    Not to be picky, but the volume of the 1 inch pipe will be reduced by 44% when going to the .75'' pipe. Also it is a reduction in volume, not surface area.

    Thanks for your information.

    TLY
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    Thank you, Waterloo, from your search suggestion...

    Thank you, Waterloo, from your search suggestion I did find a service manual and found the information I have been looking for. On page 45, there is a table "Capacity multipliers as a function of...
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    I was hoping to find the information here from...

    I was hoping to find the information here from someone. If I bought a lottery ticket and asked my contractor for this information, well...let's just say my odds would be better winning the...
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    Are these specifications published? I need to...

    Are these specifications published? I need to know by what percent the capacity of a Goodman GSH130481AA Heat Pump (4-ton) is reduced by using a 7/8'' O.D. suction line rather than the specified...
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    Is this 3% reduction in capacity independent of...

    Is this 3% reduction in capacity independent of the size of the heat pump, or does this percentage increase as the capacity of the heat pump increases?

    For example, if a 3-ton unit has a 3%...
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    So does that mean a 4 ton unit will function like...

    So does that mean a 4 ton unit will function like a 3.88 ton unit? Also, are sensible and latent cooling capacities equally affected, or is one affected more than the other?

    Thanks,
    TLY
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    By how much is the capacity lessened?

    By how much is the capacity lessened?
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    Well, it must have impacted something in a...

    Well, it must have impacted something in a significant way. That is an increase of 33%. (3/4'' nominal to 1'' nominal) I would be interested to know what problems were solved or what efficiencies...
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    If a suction line is too small will it cause any...

    If a suction line is too small will it cause any noise problems or will it only affect efficiency?
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    The lineset is 50 feet.

    The lineset is 50 feet.
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    1-1/8'' Suction Line

    Goodman GSH130481AA Heat Pump specifications call for a 1-1/8'' suction line size (O.D.). Can an already in place 7/8'' line be used without ANY problems? What problems are possible from an...
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    No, I only have the demo version ...

    No, I only have the demo version which doesn't allow for more than three rooms. What I was able to do, though, is calculate the sensible heat gain for my goegraphic location, window type, window...
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    I know most people don't like to say so directly,...

    I know most people don't like to say so directly, but I must conclude that you think this is a faulty application and it should be corrected to specifications/standards.

    I did call Goodman and...
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    How critical is the approved match? I've gotten...

    How critical is the approved match? I've gotten conflicting answers from "this is not a mismatch" to "don't do it." As a new homeowner who knows little about HVAC systems, I am seeking objective...
  43. Thread: Suction Valve Size

    by TLY
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    Sorry for the confusion. I am talking about the...

    Sorry for the confusion. I am talking about the suction line size. I measured it in the attic where the pipe is straight. Let me rephrase my question:

    Does a larger than manufacturer specified...
  44. Thread: Suction Valve Size

    by TLY
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    Suction Valve Size

    My Goodman heat pump (GSH130301AA) has within its specifications the use of a 3/4'' O.D. Suction Valve. The suction valve size that I have is 7/8'' O.D. Does this above specification size of the...
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    OK, thank you. I went to the Goodman website and...

    OK, thank you. I went to the Goodman website and found the air handler specifications for the System 1 indoor unit (ARUF364216AA) and did not see specified what heat pumps could be used with this...
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    Thank you for your responses. I am still...

    Thank you for your responses.

    I am still curious if it is OK to match a 2.5 ton condenser with a 3-4 ton evaporator and match a 3.5 ton condenser with a 4-5 ton evaporator.

    Will a load analysis...
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    Split System Heat Pump Mismatch

    Is it a problem to have a mismatched indoor and outdoor components?

    Specifically, I have two systems with the following:

    System 1:
    Heat Pump-Goodman GSH130301AA (2-1/2 ton)
    Air...
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