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Type: Posts; User: faith

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    Simple?

    "Could this temperature difference indicate a leak in the return ducts?"

    Or could this delta indicate a chimney effect within the supply?

    Why not have a blower door test run on the structure...
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    2,072

    Available for free via inter-library loan system

    flemingljr

    Yes with high school mathematics you can do an ACCA Manual J calculation, albeit you will not be able to make meaningful inferences from the results owing to the lack of validity of...
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    10,474

    Fairfax County?

    VAQuestion; If you live in Fairfax County then your existing equipment was sized by a Manual J calculation. It is a jurisdictional Code Requirement that a mechanical permit be obtained on all new...
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    Ask for references

    KatFarmer;

    One “safe” gauge of reliability is the length of warranty provided by the equipment manufacture. I work for a TRANE shop and we install products that span the full spectrum.
    ...
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    Wiring Schematic for TRANE XV Furnace Units

    siggeorge;

    You should have received the Owners & Installer's Guide for your unit from your TRANE Dealer. These documents are clearly labeled that they ARE TO BE GIVEN to the OWNER at time of...
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    32,630

    Food for thought

    After searching through this thread I’ve become concerned that the spirit and intent of the actual issue at hand hasn’t been taken to heart. The adverse health effects caused by ozone depletion are...
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    Specifications for Unit

    Only your jurisdictional inspection agency can answer this...
    Albeit we always install per manufactures specification and requirements, make sense?
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    1,666

    Be certain to consult the manufacture’s specs

    AW;

    Where are you located? What time of year was the home built?

    You've received excellent advice about a concern that your HVAC system was run during the construction of your home. This is a...
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    NATE Certified Technicians

    Tigerdriver;

    You’ve already received good advice…
    Check with the local BBB, bad news travels fast and far.

    That said, since you are looking for Service rather than Sales I strongly...
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    1,805

    Hhomeowner; Have you discussed this situation...

    Hhomeowner;

    Have you discussed this situation with your Carrier Contractor?

    If so what was his/her reply?

    In order to obtain meaningful support from this forum you might consider providing...
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    2,196

    Safety First

    Amy;

    Owing to the age of your furnace, it is now at its limits of the intended design life. To this end you need to be very concerned about the integrity of the heat exchanging unit within the...
  12. Thread: SEER vs EER

    by faith
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    SEER verses EER

    Mchild;

    We receive this question frequently, thus in a nutshell, the “S” is an abbreviation for Seasonal (an average) adjustments of EER.

    EER: (Energy Efficiency Ratio) The ratio of the...
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    R22 Phaseout Schedule

    Sue;

    Your wish is my command:

    "I just wish I could see into the future as far as availability is concerned. Plus my contractor prefers R22."

    Look no futher than the Authoritative Source:
    ...
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    1,715

    Ari

    Sue;

    In answer to your question: “Would that be because the units they sell (Rheem) are rated differently?”

    All residential air conditioning units in question are rated by the Air-Conditioning...
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    Bayan440; Because of Florida's operational...

    Bayan440;

    Because of Florida's operational expense you might want to get a quote on a 2TWX5030A1000A for comparison.

    Important Note: Since

    “Existing electrical, refrigerant, and...
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    Vendor carried by wholesaler

    Frankt;

    From your all your previous posts it appears that this is a retro-fit into an existing system, correct?

    If so have you enlisted a professional competent with at a minimum ACCA’s Manual...
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    Authoritative Source

    Airbuck;

    I recommend that you only provide information from an authoritative source. Unfortunately far too many have vested interests and hidden agendas that cloud the waters on the HCFC phase...
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    Why not just ask?

    Please do consider open and sincere communication with the technician at the time. You could save yourself and others from possible unwarranted trepidation.

    Case in point, if you arrive at a...
  19. Thread: TXV function

    by faith
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    Thermostatic Expansion Valve

    What does the TXV do? It replaces a fixed orifice valve which is only capable of a static flow of refrigerant into the evaporator (under any given system temperature/pressure scenario). As...
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    Wood Stove verses Fireplaces

    pioneerbear;

    Thank you for your input on this forum, I personally wanted to say that I'm sorry you had to suffer the abuse that comes with trying to understand a closed industry. I didn't dare...
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    Validation of Manual J results

    Please allow me to preface the following reflections by honoring Don Sleeth with a deep felt appreciation for the wonderful mission he has accomplished by automating ACCA Manual J Seventh Edition...
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    Important Consideration

    Lafutura;

    While everyone thus far seems to be focused on their own perceptions of merit, please allow me to cloud the waters.

    More important than the “brand” of unit is the connection to the...
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    Determination of equipment capacity

    Cwtdallas;

    It appears that you’ve invested some initial research into this issue, thus I’ll endeavoring to steer you in an appropriate direction based upon inferences you’ve drawn thus far.
    ...
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    ACCA Manual D

    “They will install only one return” mlbussert, I assume that “they” is a qualified HVAC Contractor, if so “they” would have designed the air distribution system to meet the required manufacture’s...
  25. Can you provide more information?

    bnbhoha; As BaldLoonie tactfully mentioned, please no dollar amounts... Also please help the Forum help you: What is the climate of your residence, it is an important variable. Does Air Conditioning...
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    Yes I wish is was uncomplicated also

    Needinfo: Don’t know how to tactfully say this but simply pushing numbers through a “heat loss calculator” doesn’t constitute much in the way of a Heating and Cooling Load analysis. First and...
  27. Thread: Flared fittings

    by faith
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    2,691

    Reason Given by Training Professional

    I attended a Vendor training session where this question came up. The “Factory” rep said that it seems nearly all major manufacturers of residential refrigeration equipment have (at one time or...
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    As the old saying goes, what do you call the...

    As the old saying goes, what do you call the student who graduated at the very bottom of his/her class in medical school? “DOCTOR”

    That said, my service manager finally got off my case for...
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    Please review Carnak's URL

    Thank you Carnak
    and Don
    and Gary Reecher

    Good Job!
  30. Replies
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    3,959

    It’s All About Conviction To Professionalism

    (Personal Opinion verses Professional Judgment) First and foremost, heat exchanger inspection is one of the most important professional duties a HVAC Technician is required to perform (my personal...
  31. Thread: PVC Adhesives

    by faith
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    I was taught repeatedly in the field, purple is...

    I was taught repeatedly in the field, purple is primer, and if you don't see purple on an existing joint then you are guilty if you don't replace it. This opens up a new can of worms...
    ...
  32. Writing is both art and science… Find an author...

    Writing is both art and science… Find an author who has master the art form to a degree that you enjoy and the literary work will rollout before you like a pleasant journey. Personally (and...
  33. Thread: Rebates

    by faith
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    700

    klk; Rebates are offered by HVAC vendors to...

    klk;

    Rebates are offered by HVAC vendors to reduce their warehousing overhead during slow periods. Typically Sept-Oct and April-May. Which are also excellent times to upgrade and replace...
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    I had a blower door test done and they'll be...

    I had a blower door test done and they'll be sealing ducts and adding insulation

    Smart move… The Achilles of the Manual J procedure are infiltration values… I’ve run the numbers through several...
  35. Thread: Sizing question

    by faith
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    Have you considered a Heat Pump?

    martik

    With winter extremes so mild, I'm have to assume at your summer extremes are high. Are you in a humid climate (A.K.A. green grass)? Either way sizing for your cooling load may drive the...
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    Green1; sorry you're seeing so many various...

    Green1; sorry you're seeing so many various answers, however it's a difficult issue. First Furnace sizing is less critical than AC sizing, DOE numbers show that they can be twice what is required...
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    Dual Fuel or the Duel of Fuels

    My shop is actively researching the potentials of Dual Fuel from an accounting standpoint. As previously noted, the control is in Thermostat (all the vendors I'm aware of sell these as dual fuel...
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    heetseeker “Is the fact that the returns have...

    heetseeker

    “Is the fact that the returns have open registers in them near the furnace causing a negative pressure in my basement that increases the radon level? We have had two short-term radon...
  39. Thread: Warranty?

    by faith
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    Yes

    Chris; I feel your pain… I agonize with this often when I have to explain the merits of the aforementioned (or want of same). The advice you’ve received thus far is very sound and honest. That...
  40. Yes I believe you are correct...

    "At every crossway on the road that leads to the future, tradition has placed against each of us, ten thousand men to guard the past". - Maurice Maeterlinck
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    In our shop we use the Manufactors specifications...

    In our shop we use the Manufactors specifications for the particular unit in question. Since we are a TRANE shop we follow TRANE's data. Our local distributor holds two day training sessions on the...
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    Absolutely no way to provide a meaningful answer...

    Absolutely no way to provide a meaningful answer without knowing the volume (cfm) of conditioned air the return has to supply to stay within design specification.

    How many tons of cooling capacity...
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    Pressure Drop

    A leak... Normally a liquid line is hot to the touch. The liquid refrigerant is actually sub-cooled below saturation pressure to avoid "flash gas" from forming before the liquid reaches the orifice...
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    Help is on the way (passive flat screens)

    Yep, a PC generates heat! Just visit a NOC (Network Operations Center) with thousands of rack-mounted servers that would melt down without massive cooling input. A small business operation with a...
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    Strawewe; Help the forum help you… Provide he...

    Strawewe;

    Help the forum help you… Provide he serial number and model number of your unit. Why the serial number? Carrier imbeds date of manufacture in this value… The same model number may...
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    Real Value of Money

    tas;

    It appears that your focus is on total cost of ownership over the life of the equipment (operational expense combined with initial investment.) I have to deal with this question all the time,...
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    trepka1440; If you review evaporator coil...

    trepka1440;

    If you review evaporator coil specification you will immediately notice that the same physical piece of heat-exchange hardware is used over a range of capacities depending on the fixed...
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    amrik; 1. Are you single-phase or...

    amrik;

    1. Are you single-phase or three-phase?
    2. Since this is a residential forum I'm assuming single-phase permanent split-capacitor motor, is this correct?
    3. How much current (amps) is...
  49. Thread: A/C sizing

    by faith
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    1,753

    sd47 "what is the point behind using a 21/2Ton...

    sd47

    "what is the point behind using a 21/2Ton coil with a 2Ton unit?"

    The same physical coil element is rated at different capacities depending on the refrigerant control device supplying...
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    Preston's Guide rates it @ 8.7 SEER and 28400...

    Preston's Guide rates it @ 8.7 SEER and 28400 BTU's / hour. However with age those numbers fall off... Coils lose contact surface due to clogging and compressors lose ability to achieve full...
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