can someone please tell me, what will happen if thermostat 24v is used for 120v wiring for gas hot water boiler. will this thermostat work? and thank you. just curious
2006-11-11 00:08:40 · 7 answers · asked by mike m 1 in Home & Garden ➔ Maintenance & Repairs
thank you all, when installing my new boiler DE dietrich gas hot water, for some reason my contractor did not do the wiring properly. he pulled the thermostat's wire from 120v side as instructed on the chart. not sure why he couldn't transform the power to the low side 24v thru the transform located inside the boiler, he told me he tried everything. I also called couple more guys to looking into it, not sure why they couldn't figure it out. the company is out of business.
2006-11-11 06:30:06 · update #1
A 24V thermostat is designed to bring on a boiler/furnace on the low voltage (24V) side of the boiler wiring. Under no circumstances should it be used on the line voltage (120V) side of the wiring. However, a relay can be used to trigger something on the line voltage side by using a 24V thermostat. What are you trying to accomplish?
There are endless ways to both wire and plumb a boiler, circulator pump(s), zone valves and associated safety devices – both the right way and wrong way. .If your question is beyond a thermostat choice, I strongly recommend you have a licensed HVAC technician from another company resolve your particular situation.
2006-11-11 00:22:20 · answer #1 · answered by frogpaws 2 · 2⤊ 0⤋
Believe it or not, I came up on this on an old boiler, someone used a 24 volt t-stat to control their boiler pump and ran 120 volts thru the stat and back to the pump. The stat will take it for awhile, depending on the make and quality of the stat. This stat was a Honeywell T87, round stat. the resister in it would cut the pump off every 60 seconds or so. There are t-stats that are desigened to run with 120 volts and are common, they just have to ordered that way.If this is a new boiler, why are they not using the terminal strip on the boiler, that is designed and used for boiler controls, to, ohh lets say, control the boiler. That strip is already at 24 volts. Might not hurt to get someone else(not from that co.) to come out and look at this as a second opinion, and if the first company screwed it up, have it fixed by the 2nd company and make the first pay for the cost and repairs. It chaps my hide when people do not know what they are doing and expect people to pay them as well.
2006-11-12 00:39:45 · answer #2 · answered by Leo C 2 · 0⤊ 0⤋
120v Thermostat
2016-10-06 04:30:53 · answer #3 · answered by Anonymous · 0⤊ 0⤋
When correctly hooked up as supervisory 24V cicuit OK. Never across 120V line switching.
2006-11-11 01:51:35 · answer #4 · answered by Anonymous · 0⤊ 0⤋
most likely the wires inside the thermostat would begin to get hot, then smolder, and smoke, then melt completely possibly causing a fire that burns down the house..
2006-11-11 02:22:49 · answer #5 · answered by Anonymous · 0⤊ 0⤋
24v wire can not handle the load placed on it from the 120v and will burn up......the gag. is smaller and not rated for this.....u can burn ur house down........
lic. gen. contractor
2006-11-11 01:33:41 · answer #6 · answered by bigg_dogg44 6 · 0⤊ 0⤋
you would burn up the 24v thermostat real quick
2006-11-11 00:26:35 · answer #7 · answered by DASH 5 · 1⤊ 0⤋