Ask Experts Questions for FREE Help !
Ask
    lucky6025's Avatar
    lucky6025 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jan 27, 2009, 04:15 PM
    Which thermostat to use/line voltage
    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
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 28, 2009, 01:55 AM
    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.
    lucky6025's Avatar
    lucky6025 Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Jan 28, 2009, 11:24 AM
    Quote Originally Posted by hvac1000 View Post
    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
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Digital Thermostat for Line Voltage Heating AND Cooling? [ 2 Answers ]

Hello folks, I live in a condo in a relatively old building (~65 years) which uses line voltage thermostat controls (120/240V) for both heating and cooling (the heating and cooling source is a convector - they switch the building from heating to cooling every season). I'm trying to find a...

Halogen - line voltage (120v) or low voltage (12v) [ 5 Answers ]

Hi. I am renovating the kitchen and plan to install small halogen MR16 ceiling pot lights. Contrast and Lightolier have been recommended. At least, the Contrast line is available with either line or low voltage feeds. These questions come up as the plan calls for 9x35w MR16 (ceiling pot...

Replacement for medium line voltage thermostat [ 1 Answers ]

Hi, I have an old Honeywell T451A medium line voltage (120V) thermostat for a FHW by oil system. The thermostat mounts vertically and I would like to replace it with a modern (setback) type unit to save energy. I am having trouble trying to find a replacement as most are for straight electric...

Low voltage or line voltage? [ 3 Answers ]

I have electric ceiling heat. How can I tell whether my thermostats are low voltage (24 volt) or line voltage (120 or 240 volt)?

View more questions Search