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swampdawg_101 11-20-2008 12:43 AM

Thermostat Wiring issue
 
i am trying to wire up a new digital thermostat for my in-laws they had a old school white-rodgers and I have a new robertshaw digital one. well i wired it up going by the colors and it heats when it is suppose to cool and cools when it suppose to heat. now I'm pretty sure the reverser valve has something to do with it but i'm lost please help and if you dont know send money;)

kennzz05 11-20-2008 01:44 AM

if the brand of equipment is ruud or rheem the reversing valve needs to be powered by the b terminal or read up about switching the o/b terminal in the setup menu if its not the above brands the (usually) orange wire should be on "O" so if its rheem/ruud and you have both a "O" and a"B" terminal you will use "B"
if the stat has one terminal for both O/B you will need to enter the setup menu and if the default setting is O which means reversing valve powered for cooling you need to switch it in the setup menu


christ i that sounds confusing even to me so..... what type of equipment do they have and what terminal was the orange (hopefully orange) wire on

pbservano 11-20-2008 07:04 AM

Quote:

Originally Posted by swampdawg_101 (Post 187588)
i am trying to wire up a new digital thermostat for my in-laws they had a old school white-rodgers and I have a new robertshaw digital one. well i wired it up going by the colors and it heats when it is suppose to cool and cools when it suppose to heat. now I'm pretty sure the reverser valve has something to do with it but i'm lost please help and if you dont know send money;)

Ken is correct. On your programming mode of your new thermostat, there is section for "Heat Pump changeover valve", there is two options to change, Option 0- for cooling changeover valve and Option 1 - for heating changeover valve. Selecting option 1 will energize your reversing valve making your system operate on heating mode. This is only for certain model heat pump, as KEN mention.

swampdawg_101 11-20-2008 10:23 AM

Thermostat Prob
 
Its a Robertshaw 9500, It is non-programmable and there is no Orange wire there is a Red, Yellow, Green, and Blue.

dac122 11-20-2008 11:38 AM

Can you describe the system: A/C with furnace, or Heat Pump, or something else? What are we dealing with here?

You mentioned reversing valve. The Robertshaw 9500 is not designed to run a heat pump.

swampdawg_101 11-20-2008 12:00 PM

Thermostat issue continued
 
It is a Central unit A/c and heat pump. The wiring diagram shows the way to hook it up to a heat pump and it has a switch inside that switches from heat pump to non-heat pump so it is set up to run a heat pump. i just dont know if I am set up to wire it for one haha. There is a furnace down stairs and no duct work coming in from the outside unit so i believe "stop me if I am wrong" would mean there is a reversing valve on the unit.

dac122 11-20-2008 12:09 PM

Quote:

Originally Posted by dac122 (Post 187696)
You mentioned reversing valve. The Robertshaw 9500 is not designed to run a heat pump.

Sorry, my mistake that tstat does support an HP. RobertShaw's website is not clear on this tstat.

So what wire colors do you have, and what terminal labels were they connected to the old tstat? Also what was the old tstat model?

pbservano 11-20-2008 01:18 PM

Quote:

Originally Posted by swampdawg_101 (Post 187675)
Its a Robertshaw 9500, It is non-programmable and there is no Orange wire there is a Red, Yellow, Green, and Blue.


Try this, hook up blue wire to "B" terminal. I looked at the drawing of the installation manual. Your "B" terminal is suppose to be your heating reversing valve.

swampdawg_101 11-20-2008 01:35 PM

Wiring issue
 
here is what I got so far. I have the Green to G, Blue to B, Yellow to Y and the Red is to RH with a preinstalled jumper to RC. And it is still heating in cool and cooling in heat

kennzz05 11-20-2008 01:44 PM

if there is an o terminal hook the b to o

pbservano 11-20-2008 01:48 PM

Quote:

Originally Posted by kennzz05 (Post 187738)
if there is an o terminal hook the b to o


There is a "O" terminal, on the terminal board. This heat pump :wink:might be wired to operate with reversing valve not powered up during heating mode.

swampdawg_101 11-20-2008 01:52 PM

I tried to wire the blue to the O last night and it wouldnt do anything. i just jumped the Y and the W together like the book said to not sure if it is going to work or not. The book shows wires that I dont have and I have wires that the book doesnt show, well one anyway.

dac122 11-20-2008 01:55 PM

What terminal labels were they connected to the old tstat? Also what was the old tstat model? Do you know what the wires go to?

If you can't tell us more about the system, where those wires go, or how the system was setup, we're going to have some trouble helping.

kennzz05 11-20-2008 02:00 PM

y and w will give you heat and a/c at the same time, not too good!
hook the wire thats on b term to the y along with the yellow wire see if that works
a thought just dawned on me did you change the stat bcause of a heating problem to begin with theres a possibility the reversing valve is stuck or the compressor isnt running
just because you see the fan running outside dosent mean the compressor is running stick a screwdriver thru the top to stop the fan have someone turn the a/c on and see if you can hear the compressor start if so than it might still need freon which will keep it from producing any heat and also prevent the reversing valve from switching over

swampdawg_101 11-20-2008 02:52 PM

Ok I didnt label nothing which was dumb but now I am in a jam all the same. I changed the Tstat from the old model to the new model trying to save money on the electric bill, I have always heard that a digital tstat will save money and so far it is saving a 100% because it isnt working at all. I was looking around and just noticed something the red wire that I have been talking about seems to be a brown wire instead of red I just thought it was old and burnt looking but I am pretty sure its brown. There again the wiring diagram doesnt show this color at all.


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