wiring a tekmar 519 tstat to sr506

wrxz24

The problem I am having is that according to the manual, I need 4 wires, 2 for power(C and R) to the 24v on the taco, and 2 (Rh and W) for the on/of, and I only have 18/3 wire coming out of the wall.



Is there a way to wire the tstat without having to run new wire?



Thanks in advance

JohnNY

i would imagine..

....you could put a jumper from the R terminal to to the Rh?

wrxz24

I tried that

And it got power to the unit but the circulator would not run on a heat call. The tstat showed a heat call but the circulator would not run.

JohnNY

hmmm

If the light shows the call for heat at that zone, then the relay has pulled in. There's something else wrong. It's not your thermostat wiring. Check for 120v across your pump terminals. If you don't have it, swap out the corresponding ice cube relay with another one in the 506. See if that brings power to your terminals.

wrxz24

The light on the relay

Does not turn on. The thermostat says "heat on" but the relay light is not on. When i hook my 2 wire wirsbo tstat back up, all works on a heat call.. If i jump wire from the 24 v to the T on the relay, the circulator kicks on.

JohnNY

Interesting.

In that case, you're right, there's an issue with the thermostat.

I'm looking at the manual, like you are I'm assuming, and every diagram aside from the switching relay installation uses a jumper to power R -Rh.



http://tekmarcontrols.com/images/_literature/519_dl_01.pdf



No idea why yours isn't working. It looks like it should. I wonder if there's not an internal error in your 519.

Zman

Commons

That detail should work for you. The drawing on the bottom of page 9 of 16.

Are you tying the commons back together in the mechanical?

Instead of going too 7 and 2 on the 003, go to R and W.

Hope that makes sense, The t-stat  control and the sr506 relay both need a common to work correctly.

Carl

wrxz24

I got it to work

Thanks fellas