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  1. #1
    i am having a hard time finding info on the web for this project,my textbook has 1300 pages and i cant find all the info.line diagram must be shown in cooling mode w/ifr,contactor,cb,ch,comp,dft,ifm,lps,hps,ofm,ofmc, rvs,th,tran,tb,cst,crc. if anyone can lead me in the right direction i would greatly appreciate it,any websiteswould help thank you.

  2. #2
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    look for symbols for:
    coil
    switch
    pressure sw
    thermal activated sw
    solenoid
    xformer
    capacitor
    fuse
    motor -- 3ph,1ph
    overload

    know the difference between N.O. & N.C.

    remember, all diagrams shown in the quiescent state.
    source | hot on left, common on right
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  3. #3
    Join Date
    Jun 2003
    Location
    Florida
    Posts
    9,548
    If you have the book you have the info. Look in the index for electrical symbols,ladder diagrams,etc. If you lose your internet connection you can still find the info in your book.
    If everything was always done "by the book"....the book would never change.

  4. #4
    Join Date
    Jan 2003
    Location
    Kentucky
    Posts
    2,651
    Originally posted by learning tech,help please
    i am having a hard time finding info on the web for this project,my textbook has 1300 pages and i cant find all the info.line diagram must be shown in cooling mode w/ifr,contactor,cb,ch,comp,dft,ifm,lps,hps,ofm,ofmc, rvs,th,tran,tb,cst,crc. if anyone can lead me in the right direction i would greatly appreciate it,any websiteswould help thank you.
    the joys of studying and learning!!!!

  5. #5
    Join Date
    Oct 2004
    Posts
    3,400

  6. #6
    Join Date
    Aug 2005
    Location
    Pa.
    Posts
    383
    Learning tech, Here are a couple of pictures of wiring diagrams from a 1992 York E1FB heat pump. The 1st picture shows the airhandler with electric backup heat. The 2nd picture is the outdoor unit schematic - it shows the thermostat, outdoor components, and relays at the airhandler. They might be a little hard to read, but I hope it helps.








  7. #7
    Join Date
    Dec 2003
    Posts
    165
    What book are you in?

  8. #8
    Join Date
    Apr 2004
    Posts
    7,680
    A ladder diagram gives you more than just wire connections. Usually, it works like a ladder when it comes to sequence of operation also. You start at the bottom, and must successfully negotiate a rung before you climb another one. In the diagrams previously posted, the 1st is a ladder diagram, the 2nd is a schematic.

    Using his ladder diagram, you can see that the thermostat is the starting point for a call for cooling. You step up one rung at a time. (No this was not a very good example).

  9. #9
    Join Date
    Aug 2006
    Location
    cleveland georgia
    Posts
    110
    hard to read lol yeah right at least we aint standing on our heads with a flash light and a magnifying glass checking the only wireing diagram not already peeled off the unit which happens to be the size of a playing card and the only one left because it was written in french while a homeowner is looking over our crotch asking questions that dont even pretain to the unit at hand. now that my friends is hard to read

  10. #10
    Join Date
    Oct 2004
    Posts
    3,400
    Originally posted by swagging tool
    hard to read lol yeah right at least we aint standing on our heads with a flash light and a magnifying glass checking the only wireing diagram not already peeled off the unit which happens to be the size of a playing card and the only one left because it was written in french while a homeowner is looking over our crotch asking questions that dont even pretain to the unit at hand. now that my friends is hard to read
    I asked the Ruud factory trainer if there was a shortage of paper in Arkansas.

    He looked at me a little funny until I showed him the "playing card sized" diagram.

    If you never complain, they'll just keep doing it.

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