Hi,question? After a lot of reading and research I believe I have line voltage thermostats (honeywell T451A 1025 2)two wires 1-black 1-white (heavy gauge wiring) went to boiler and checked location and white connects to B2 andC2 and black connects to B1 and C1.My question is wanting to go with programmable thermostat,what are my options,I can't determine if it is 120 or 240,looked on burner and can't find info anywhere.Oil/forced hotwater/baseboard system/Burnham burner.Any help would be greatly appriciated.Thanks Bill

According to this you have a line voltage thermostat for that model number.

http://customer.honeywell.com/techli...0s/63-2051.pdf

To find out for sure weather it is 120/240 you will need a meter to test it.

If you want to find a line voltage thermostat look around here for your options.

Catalog

Pick the type you want then look for line voltage models.

Quote:

---

Originally Posted by hvac1000

According to this you have a line voltage thermostat for that model number.

http://customer.honeywell.com/techli...0s/63-2051.pdf

To find out for sure weather it is 120/240 you will need a meter to test it.

If you want to find a line voltage thermostat look around here for your options.

Catalog

Pick the type you want then look for line voltage models.

---

Thanks for answer,but this is how I got confused in first place called Honeywell and spoke to tech(which was hard English very poor) gave him all the #'s off thermostat/furnace/wiring and he said can't use programmable thermostat,answer made no sense as neighbors having same system just original in floor heating have programmable thermostat and mine was changed over to baseboard but same burner and smaller circulator pumps.Lux tech said I could use ELV1 programmable unit.Just looking for all my options before making decision,Why I asked question in first place.Thanks again Bill