HomeRoast Digest


Topic: RS transformer wiring specifics (9 msgs / 231 lines)
1) From: AlChemist John
Sometime around 15:22 1/12/2003, Mike McGinness typed:
<Snip>
Ok, I jumped in on this and read the above, "thought" I understood it, 
bought a 2V 25.2v transformer, wired it into my WBI fan and all it does is 
hum.  I have reversed all the connections and still the same.  I have wired 
it up as follows.
I have a post connection that has a hot 120v lead hooked to it.  To this 
post I have wired one black transformer lead and one "jumper" lead.  This 
jumper lead is connected to one yellow transformer lead and one fan 
lead.  The other yellow transformer lead is connected to the other fan 
lead.  The other corresponding black transformer lead is connected to the 
another 120v lead.
Apparently these two are not equivalent but I can't find the problem.  Does 
someone see the problem?
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

2) From: dewardh
John:
I hope this comes across clear enough . . . I've got to set up a web page for 
pictures, graphs and diagrams RSN .
120b.............BYxxxxxxxY...............Fb
                     x
                     x
                     x
                     x
120w.............B................................Fw
If the voltage at F F (fan) is lower than line then reverse the two yellow 
leads. If you use a dimmer speed control put it between F F and the fan.
Deward
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3) From: Mike McGinness
John,
I'll post pictures of the RS transformer boost wiring, by this weekend...
maybe tomorrow. Don't have time to take it apart at the moment. Gotta make a
batch of 'Road Warrior' WCKM before bed or will suffer without tomorrow!
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'

4) From: Mark Neuhausen
John,
You probably are getting 120 VAC minus the transformer voltage.  If you
reverse all the leads, you do not change anything.  Try reversing just the
two transformer leads and leave the 120 VAC alone.
-Mark
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5) From: AlChemist John
Sometime around 21:50 1/23/2003, dewardh typed:
<Snip>
I comes through fine, per se.  I just have no clue how to interpret the 
pseudo-wiring diagram.  I was rather expecting something pointing out what 
was wired wrong.
It looks like you are saying to wire one 120 black lead to the fan along 
with both yellow leads on one side of the fan and just 120 black (with 
maybe another black jumper) too the other side, with no yellow transformer 
connection.
That makes no sense.  Want to try again?
Or I guess I will have to wait for MM to get his pic uploaded to his web 
site this weekend.
BTW, my voltage across the fan was less than 120.  It was 27.4v, no load spec.
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

6) From: AlChemist John
Sometime around 03:51 1/24/2003, Mark Neuhausen typed:
<Snip>
I think I did this but I will try again.
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

7) From: dewardh
John:
<Snip>
spec.
You have wired it as a "normal" transformer.
Back to the "drawing" . . . I figured that the "legend" would be self 
explanatory . . . guess not.
120b.............BYxxxxxxxY...............Fb
                     x
                     x
                     x
                     x
120w.............B................................Fw
120b(lack) and 120w(hite) are the power line in (probably not color coded,
                                       but white goes to the larger spade on 
the plug,
                                       and in "zip" cord is usually marked by
                                       an embossed stripe in the insulation.
                                       It's "neutral", and should be preserved 
for safety
                                       ("preserved" meaning connect the same 
wires
                                       to neutral after the mod as were 
before).
B and B are the black leads on the transformer
Y and Y are the yellow leads on the transformer
Fb(lack) and Fw(hite are the fan leads  (which probably are not color coded, 
but see above)
xxxx  represents the transformer coils
..................  represents wire
There . . . does that clear things up?
If the voltage at F F (fan) is lower than line then reverse the two yellow
leads. If you use a dimmer speed control put it between F F and the fan.
Deward
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast">http://lists.sweetmarias.com/mailman/listinfo/homeroasthomeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

8) From: AlChemist John
Sometime around 10:00 AM 1/24/2003, dewardh typed:
<Snip>
Yes.  It is truly amazing what you don't see when you don't know what to 
look for (or even worse, think  you know what you are going to see)
What that translate to is that between your drawing (which now make sense) 
and MM pics, I see they both correlate exactly with MM original wiring 
description.
I now have no clue as to why it work, but I have not really tried to think 
it though.  Hopefully I am wiring up today.  I will let you know if what I 
think I know is really what I know or just what I thought I knew,  I think...
I know I need to go get a cup of coffee :-)
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

9) From: Mike McGinness
From: "AlChemist John" 
<Snip>
think...
<Snip>
I think, therefore I home roast. I'm on my first morning cup and thoroughly
thought through the thinking thoughts thrust this way though thinking
thudded 'till mind gets mudded. All I meant to say was I enjoyed your
post!:)
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast


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