I just purchased a totaltouch P286-1300 which I know is a little bit of over kill for my system, but I like the way it looks. Anyway, I just a simple two wire baseboard gas heating system. When I connect the wires the screen lights up and comes on just fine. When I use the system the thermostat continually clicks on and so does the furnace. I checked the website of the thermostat and it said I need to use a common wire for a gas furnace. I traced the wiring to a honeywell aquastat relay type L8I48E. The wires are connected to terminals TV and T. There are W and Z left untouched with just a jumper in between them connecting them together. I don't see where a common wire would be connected unless its just supposed to be grounded? I Don't know! Any help would be greatly appreciated! thanks!

Scott

KeepItSimpleStupid

I found the Aquastat manual here: http://customer.honeywell.com/techli...0s/95-6940.pdf

Right now, I'm too tired.

ragefear

hahaha! damn, I looked around for that too! thanks! maybe that can lead my way

ragefear

I still don't get it... what is the common wire supposed to be connected too?

labman

There are 2 wires come off the transformer furnishing the 24 volts. One goes directly to the thermostat commonly called the hot. Often it is blue. (Oops! that should have been red) The other connects to the one side of all the coils in the relays and is called the common. Often it is blue.

For more info, see the sticky at the top of the forum here.

KeepItSimpleStupid

Z = Common (Black)
Rh = TV (Red)
W = T (White)

ragefear

alright, thanks guys, I will give that a try

ragefear

right now Z is jumpered with W, should I remove the jumper?

KeepItSimpleStupid

No.

ragefear

thanks, that seemed to fix my problem!