Identify This Part

tbone4628

Help. I believe this is the thermostat for an in slab electric heat system. I'd like to know some more about it. Like what the Settings (A, B,C, etc) mean, what I should set it to for season or temperature. Would like a data sheet or even better a recommendation for a more modern replacement that uses room temp and slab temp. Any recommendations appreciated.

Alan (California Radiant) Forbes

Here is something that looks like it; rebranded, but with the same operating instructions?

https://www.ebay.com/itm/335002361124?chn=ps&mkevt=1&mkcid=28&srsltid=AfmBOopsjZx_tMRGiVXqrHs7Dqk0Ft8Mk4hf8BRI53sD1MNP0H49iB-HgQo

And you might find something on the Penn website.

https://www.penncontrols.com/resources/technical-literature

Steamhead

@tbone4628 , what is this unit connected to? Heating elements? Circulator pump?

dko

Couldn't find the manual, but some old ads with some feature explanations

tbone4628

Thanks for the replies so far. Its controlling an in slab electric heat circuit. Thermostat type wires into the floor which I expect to be to a temp sensor. And two wires up to the "off peak" control box which I suspect control the current to the heat elements. The back has just these 4 connections to a black box. Cant tell if its control for a relay or the relay itself. Here is a picture of the back. Looks line PN T31bb-1