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  1. #1
    Join Date
    Mar 2013
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    112

    York YHJF 2.5 ton Vs Trane 15I 2.5 ton

    I am more inclined to pick the York , it is easier to find all the expanded performance data for them. I would like to know more about the trane but I can't seem to fine the performance data so i can get a balance point.

    Any one have the tables?

    Thanks.

    Jimmy

  2. #2
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
    Posts
    3,371
    What indoor model are you pairing the Trane with (full model #)?

  3. #3
    Join Date
    Mar 2013
    Posts
    112
    That is the problem I don't have any numbers for the Trane. I was thinking the TAM 7 but I have no performance numbers to compare

  4. #4
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
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    3,371

  5. #5
    Join Date
    Mar 2013
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    112
    Thanks

  6. #6
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,287

    Thumbs up Balance Point Chart provided ... thanks to Ryan H's link

    Quote Originally Posted by RyanHughes View Post
    Addressing use of 2.5 ton XL15i with 1,200 CFM [ARI 5021599] for a calculated 24,000 BTU/HR at 10'F.
    One might expect a Balance Point near 20'F ( +/- 4'F) if heat loss calculation is accurate within 10%.
    No heat loss calculation is KNOWN to be accurate within 10%
    without a measured infiltration and known window characteristics.

    See attachment for "visual explanation".

    Also, heat loss at 40'F is half the capacity of this 2.5 ton heat pump,
    so one may guess run times to be near or < 50% when the Outside Air is > 40'F.
    Attached Images Attached Images
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  7. #7
    Join Date
    Mar 2013
    Posts
    112
    Thanks Dan

    If the load calculation is close to accurate it seems to be a good choice with a 3kw Aux heat to supply 8000 btu's/hr when needed.

    I have added 25% to the numbers I get with HVA calc and come up with 27000 heat loss @ 20 F
    I am also thinking of going with a 3 ton 2 stage so more heating at high and sufficient cooling in low stage. Would that be OK or too oversized.
    Would that be enough to take the chill out when the system defrosts?
    Someone if finally suppose to show up here next week and do a load calculation.

    Jimmy

  8. #8
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,287
    Quote Originally Posted by JimmyP View Post
    Thanks Dan

    If the load calculation is close to accurate it seems to be a good choice with a 3kw Aux heat to supply 8000 btu's/hr when needed.

    I have added 25% to the numbers I get with HVAC calc and come up with 27000 heat loss @ 20 F
    I am also thinking of going with a 3 ton 2 stage so more heating at high and sufficient cooling in low stage. Would that be OK or too oversized.
    Would that be enough to take the chill out when the system defrosts?
    Someone if finally suppose to show up here next week and do a load calculation.

    Jimmy
    I suspect your calc is probably accurate.
    However, infiltration is nearly Always somewhat of an Unknown.

    3 Ton __ First stage balance point = ~ 30'F.
    3 Ton Second stage balance point = ~ 15'F.
    .:. Minimal use of heat strips.

    On whether a 3 Ton is a good overall heat pump selection, I am a bit ambivalent.
    It would seem to be appropriate and economical for Winter conditions.

    Maybe you'll get some Other opinions here from techs who know.
    Attached Images Attached Images
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  9. #9
    Join Date
    Mar 2013
    Posts
    112
    Thanks Dan

    Which 3Ton did you use for the plot?

  10. #10
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,287
    Quote Originally Posted by JimmyP View Post
    Thanks Dan

    Which 3Ton did you use for the plot?
    Simplification [10 minutes work instead of 35 minutes] ... 3 ton 2nd Stage is assumed = 1.17 * data for 2.5 Ton XL15i
    Conceptually IT IS GOOD.
    I doubt that 3 Ton 2 stage data would yield a Balance Point more than 1.5'F different than presented for 2nd stage.

    Similarly, First stage of 3 Ton is = 1.9 Ton which is probably a little lower than an actual 3-Ton 2 stage unit ( might be ~2.1 T).
    But, you 'got the picture'.

    That's WHY I say: It's not rocket science, But IT IS SCIENCE with "Some Art".

    If one wished to make it complex, I am going to tell one to break a year into 6 minute intervals ... 87,600 intervals.
    K I S S
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  11. #11
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,069
    Size the Aux to the heat loss, or you could be very sorry if the heat pump breaks down during older weather. And a part is on back order.

    If your going to get a 3 ton 2 stage, look into the Trane 20i.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  12. #12
    Join Date
    Mar 2013
    Posts
    112
    Quote Originally Posted by beenthere View Post
    Size the Aux to the heat loss, or you could be very sorry if the heat pump breaks down during older weather. And a part is on back order.

    If your going to get a 3 ton 2 stage, look into the Trane 20i.
    I have 2 propane fireplaces. one in basement and one on main floor if I need Aux heat. I really only want the AUX heat for the heat pump to take the chill from a defrost cycle. I am trying to install this with a 120 Amp electrical panel. HP uses 20 Amps. AH 15 without aux heat or 32 amps with 24000BTU heat strip. Though if I have to the electrical upgrade will be done if required.

  13. #13
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,033
    If I were in your shoes I would do a home energy audit and fix issues with the house and duct system rather than spending the extra on higher end equipment and get tge load down to 2 tons and use a single stage 14/15 seer York LX IMHO

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