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Honeywell RTH8500 installation

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Honeywell RTH8500 installation snakedjip 07-20-2007
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Posted by on July 20, 2007, 11:00 am
Hi,

I currently have a Robertshaw 300-208 thermostat running my Luxaire
heat-pump and (some other brand) electric furnace as auxiliary heat.

I just bought the Honeywell RTH8500 thermostat to replace it.

There are two labels on the Robertshaw thermostat which do not
correspond to any label referred by the installation manual for the
Honeywell thermostat : "24V" and "24V(c)".

I've included pictures of the current wiring. Because some of the
labels are hidden in the pictures, here's a top-to-bottom list:

W1
Y1
G
R
24V
24V(c)
O
B

Here are the pictures:

http://www.jpti.ca/IMG_6107_2.JPG
http://www.jpti.ca/IMG_6102_2.JPG
http://www.jpti.ca/IMG_6103_2.JPG
http://www.jpti.ca/IMG_6105_2.JPG

Can anyone tell me which of my wires I should connect to which
terminal on the Honeywell ?

Thanks.


Posted by Noon-Air on July 20, 2007, 11:58 am

> Hi,
>
> I currently have a Robertshaw 300-208 thermostat running my Luxaire
> heat-pump and (some other brand) electric furnace as auxiliary heat.
>
> I just bought the Honeywell RTH8500 thermostat to replace it.
>
> There are two labels on the Robertshaw thermostat which do not
> correspond to any label referred by the installation manual for the
> Honeywell thermostat : "24V" and "24V(c)".
>
> I've included pictures of the current wiring. Because some of the
> labels are hidden in the pictures, here's a top-to-bottom list:
>
> W1
> Y1
> G
> R
> 24V
> 24V(c)
> O
> B
>
> Here are the pictures:
>
> http://www.jpti.ca/IMG_6107_2.JPG
> http://www.jpti.ca/IMG_6102_2.JPG
> http://www.jpti.ca/IMG_6103_2.JPG
> http://www.jpti.ca/IMG_6105_2.JPG
>
> Can anyone tell me which of my wires I should connect to which
> terminal on the Honeywell ?


Connect all of them

If you want to know where, my PayPal account is running kind of short, make
a deposit, and I can tell you. Otherwise, call a local pro



Posted by on July 20, 2007, 12:20 pm

> Hi,
>
> I currently have a Robertshaw 300-208 thermostat running my Luxaire
> heat-pump and (some other brand) electric furnace as auxiliary heat.
>
> I just bought the Honeywell RTH8500 thermostat to replace it.
>
> There are two labels on the Robertshaw thermostat which do not
> correspond to any label referred by the installation manual for the
> Honeywell thermostat : "24V" and "24V(c)".
>
> I've included pictures of the current wiring. Because some of the
> labels are hidden in the pictures, here's a top-to-bottom list:
>
> W1
> Y1
> G
> R
> 24V
> 24V(c)
> O
> B
>
> Here are the pictures:
>
> http://www.jpti.ca/IMG_6107_2.JPG
> http://www.jpti.ca/IMG_6102_2.JPG
> http://www.jpti.ca/IMG_6103_2.JPG
> http://www.jpti.ca/IMG_6105_2.JPG
>
> Can anyone tell me which of my wires I should connect to which
> terminal on the Honeywell ?
>
> Thanks.


Have you tried Honeywells 800 number?




Posted by =?ISO-8859-1?Q?Tekkie=AE?= on July 20, 2007, 7:54 pm
snakedjip@yahoo.com wrote:
> Hi,
>
> I currently have a Robertshaw 300-208 thermostat running my Luxaire
> heat-pump and (some other brand) electric furnace as auxiliary heat.
>
> I just bought the Honeywell RTH8500 thermostat to replace it.
>
> There are two labels on the Robertshaw thermostat which do not
> correspond to any label referred by the installation manual for the
> Honeywell thermostat : "24V" and "24V(c)".
>
> I've included pictures of the current wiring. Because some of the
> labels are hidden in the pictures, here's a top-to-bottom list:
>
> W1
> Y1
> G
> R
> 24V
> 24V(c)
> O
> B
>
> Here are the pictures:
>
> http://www.jpti.ca/IMG_6107_2.JPG

Only need one pix. I'm not even in the biz but I could do it. If I
were you I would pull new wire because the Robertshaw wire isn't
accurate for the Honeywell. Add an extra 20' on each end for expansion
and contraction and the way the price of copper is going up I would buy
it NOW!

Posted by Bubba on July 20, 2007, 9:53 pm
On Fri, 20 Jul 2007 08:00:07 -0700, snakedjip@yahoo.com wrote:

>Hi,
>
>I currently have a Robertshaw 300-208 thermostat running my Luxaire
>heat-pump and (some other brand) electric furnace as auxiliary heat.
>
>I just bought the Honeywell RTH8500 thermostat to replace it.
>
>There are two labels on the Robertshaw thermostat which do not
>correspond to any label referred by the installation manual for the
>Honeywell thermostat : "24V" and "24V(c)".
>
>I've included pictures of the current wiring. Because some of the
>labels are hidden in the pictures, here's a top-to-bottom list:
>
>W1
>Y1
>G
>R
>24V
>24V(c)
>O
>B
>
>Here are the pictures:
>
>http://www.jpti.ca/IMG_6107_2.JPG
>http://www.jpti.ca/IMG_6102_2.JPG
>http://www.jpti.ca/IMG_6103_2.JPG
>http://www.jpti.ca/IMG_6105_2.JPG
>
>Can anyone tell me which of my wires I should connect to which
>terminal on the Honeywell ?
>
>Thanks.

Keeeeeeee-Rye-Min-EEEEEEEE again!
"Im a tight ass. I bought a pretty new thermostat all on my own. I
thought it would be soooooo easy. Who the hell needs one of those
fancy expensive hvac techs?"
Hint:
Hook half the wires to the R terminal
Hook the other half to the C terminal.
Turn it on and watch EVERYTHING light up (for a split second).
Then comes the fireworks and smoke because of the swell job you just
completed.
"Spank me, beat me, bite me". I dont even want your money in my Pay-
Pal. Id rather just watch the fun.
..........and I havent even finished my first beer this evening.
Bubba

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