urgent-need help on honeywell tstat replacing a bryant factory tstat

[sam smo]

I'm trying to put in a honeywell t8011r digital/programmable tstat in my bryant's place. :eek:
wires and terminals match but when i hook up i get luke warm air...
i can fgind no o/b switch so i took the oranger wire that was on the bryants o terminal and moved it from the installed o terminal on the honeywell to the b - still no dice...
i put on the old tstat, still works.

what am i missing here? :wall:

terminals/ wire color from the bryant original :

w1 =white wire
g = green wire
y = yellow wire
e = brown wire
w2 = blue wire
r = red wire
o = orange wire....

the new tstat hs these terminals, plus L, B, C, ...

help , anyone? thanks!

[Ed Imeduc]

Is this heat pump???? O is cooling changeover relay and B is for heating changeover You cant have both, just use one.

C is for common from the transformer

L Is for system monitor


ED ;)

[sam smo]

the original thermostat used the o terminal w/orange wire, the new digital has o & b ...

i tried the orange wire on each (seperate, as well as to neither), and not cooling.

and this thermostat is supposedly made for heat pumps... :wall:

[Ed Imeduc]

Dont have anything on that tstat. All I can say is a heat pump works one way or the other. Some have to pull in the 4way valve to go to AC and some have to pull in the 4 way valve to go to heat. That is what that O &B are you can only use one Hope that helps. Look on the blower door is there a wire schematic for the unit there?


ED :thinker:

[mattison]

Also read the literature that came with the stat closely. http://customer.honeywell.com/techlit/PDF/69-0000s/69-1436.pdf

[Grady]

It seems to me, we went thru a similar exercise during the heating season & discovered the common has to be hooked up on this stat. Anybody else remember the same???

Sam smo, was the old thermostat programable & if so did it use batteries?

[sam smo]

grady, thanks for jumping in, no the old was manual a prehistoric looking thing that was never accurate, so i wanted to go digital as i have 3 kids and wanted the upstairs to be somewhat controllable...any ideas?>
:thinker:

[Grady]

I hope you are not trying to control one appliance with two thermostats (up & downstairs). Also if you have one system with two floors, good luck being comfortable on both floors at the same time.

After looking at the wiring diagram again, you do indeed need to run a wire from the common side of the transformer in the air handler to terminal "C" on the stat. Another option would be to get a stat which is battery powered. Most service people do not suggest a programable thermostat for heat pump use. The most economical way to operate a heat pump is to "set it & forget it", as far as temperature is concerned.

[sam smo]

have two, one for each level... :alarm:
so what wire would go to the "c" then ?

or can you recommend a decent digital non-programmable for the heat pump? the one on there now is terribly hard ot get precise, hard ot tell if its set at 76 or 79...inaccurate, bulky, looks like 1975... :(

help?

[Grady]

You could pull another wire from the air handler. Connect it to the "C" terminal on both the air handler & the thermostat. If you want to go battery powered, I like the White-Rogers 70 series "economy" thermostats. I've probably installed a couple of hundred in the past 2-3 years & only had a problem with one. That problem was cured by bending the battery holding clips. I can sell them for less than I pay for a Honeywell & my customers love them.

[sam smo]

they work for heat pumps?
wheres the cheapest place to get one, and do they come with instructions, so i can install myself?

thanks again grady. :thumbup:

[Grady]

Yes they work for heat pumps IF you get the right one. A tip off for a heat pump thermostat for use with a system which has 2 stage heat is the stat will have a setting for "emergency heat". I don't know where to tell you to look for one other than an HVAC supply house. Most home centers sell Honeywell. Nothing wrong with Honeywell, I just prefer White-Rogers.

In re-reading your original post, I count 7 used wires. Most heat pump thermostat wire is 8 lead. Check to make sure you don't have an extra unused wire. If there is one, it could be used for the common, end of problem.

[sam smo]

grady, i can email you photos if that'll help ? :)

its just the 7.... :thumbdn:

[Grady]

You could get a piece of 8 lead & use the 7 lead to pull the new wire. Can you host the pics (maybe on yahoo?) & provide a link?

[sam smo]

grady, thanks again. i rechecked and pulled the cover off again and there are 8 wires, :alarm: the c has a black wire on it.
i'll host those pics asap.

[sam smo]

this is the original, the one that is on, and is working currently.. :mask:

http://www.geocities.com/yodayoda113/IMG_0345.JPG

http://www.geocities.com/yodayoda113/IMG_0348.JPG

http://www.geocities.com/yodayoda113/IMG_0350.JPG


do you have any idea what thermostat would be copatible with this monster? thanks again! :o

[Ed Imeduc]

Have to ask? Did you see that note on the T8011R tstat
Schematic note # 2 Remove jumper when supplied for systems with seraparte heating compressor contactor

( W1 separate from Y )

ED :coffee:

[sam smo]

there is no jumper, they are seperate on the old one... and the new one...

see the pics, thats how it is hooked up currently and working...the old beast :wall:

[Grady]

After reading, re-reading, & re-re-reading the installation instructions, the only thing I can come up with is: Maybe the previously mentioned jumper should be there. If there is only one contactor for the compressor, the way I read, you should have a jumper. I know the frustration level meter has to be off scale by now but it's worth a shot if you feel up to it. A small piece of wire of almost any kind will work.

[sam smo]

so jump w1 and y ?

or - - - if you absolutely know of a brand and model that WILL work , I'l take these 2 back.... and get them and live happily ever after!

lmk~! :alarm:

[Grady]

I can't sit here & swear to you the White-Rogers will work on your system. I've just been happier with them than Honeywell. Heat pumps are a whole different animal & the wiring is sometimes screwy. In fact I have a book 3/4" thick at the shop with nothing but heat pump thermostat wiring diagrams in it & most of the time I can't find a diagram for the system on which I'm working.