220v two pole contactor help

[Ultradog MN]

I have a portable Marley 220v 3000w electric heater that I heat my little shop office with.
Heats good but the thermostat on it is fubar.
I want to use a 220v 2 pole contactor, a transformer and a remote thermostat to regulate it.
My transformer is 110 but has two places to hook to. 8 or 16
Question:
Do I run a neutral to power the transformer and use the 16 setting or can I run it 220v and use the 8 setting to go to the thermostat?
Thanks

 

[Jim greengo]

I have a portable Marley 220v 3000w electric heater that I heat my little shop office with.
Heats good but the thermostat on it is fubar.
I want to use a 220v 2 pole contactor, a transformer and a remote thermostat to regulate it.
My transformer is 110 but has two places to hook to. 8 or 16
Question:
Do I run a neutral to power the transformer and use the 16 setting or can I run it 220v and use the 8 setting to go to the thermostat?
Thanks

What is the voltage on the coil/contactor youre using?

 

[whateg01]

Coil is 24v. What are you wanting the 8v or 16v to do?

 

[PCustoms]

What is that transformer from?

8v/16v rings a bell as being specific to something, but I can't place it...

 

[The Cobbler]

What is that transformer from?

8v/16v rings a bell as being specific to something, but I can't place it...

 

[PCustoms]

I swear I was NOT making a doorbell joke with my post...

 

[Ultradog MN]

What is the voltage on the coil/contactor youre using?

Doh.
Good question that I don't know. Was sold to me as 220 and I assumed they were correct. Doesnt say so on the box though does it. Generally though, wouldn't a 2 pole be for 220?

 

[whateg01]

Doh.
Good question that I don't know. Was sold to me as 220 and I assumed they were correct. Doesnt say so on the box though does it.

 

[Ultradog MN]

You got a much better photo editor than I do for sure. But what are you trying to tell me with the circles.
Thanks.

 

[American Locomotive]

The contactor coil needs 24, your doorbell transformer has 3 possible outputs, 24v, 16 and 8.

The doorbell transformer's primary won't tolerate 240v input. You will have to run a neutral and use the 24v output.

Or better yet just get a 240v to 24vac transformer. They sre not expensive.

 

[whateg01]

The contactor coil needs 24, your doorbell transformer has 3 possible outputs, 24v, 16 and 8.

The doorbell transformer's primary won't tolerate 240v input. You will have to run a neutral and use the 24v output.

Or better yet just get a 240v to 24vac transformer. They sre not expensive.

It might handle the 240v ok, but that 24v output would have 48 on it

 

[PCustoms]

The more I read this thread the more confused I get....

Contactor should make/break the 240v (don't call it 220v that triggers wylie diesel).

Contactor needs 24v on the coil (control side).

Thermostat will switch the 24v from the transformer.

Transformer should be hooked to 120v.

A little clumsy and could be setup better with some different components, but if the money is already spent this can work.

If I overlooked something it's late and I just got in bed so I'll catch it tomorrow

 

[whateg01]

Contactor should make/break the 240v (don't call it 220v that triggers wylie diesel).

Well it's a good thing @wyliesdiesels doesn't know about it!!

 

[Dagny]

Also you dont know the VA of the contactor coil. It is probably ok but I would want to know the inrush VA of it. To be safe get one for a furnace like 40 VA. or try that one but keep an eye on it.

 

[Dagny]

You will have no UL listing.

 

[micromind]

A doorbell transformer very likely won't be able to provide enough surge current to pull the coil in. As noted, an HVAC transformer would plus they are readily available with 240 volt primaries. No neutral needed.

 

[Ultradog MN]

Thanks fellas.
I know what I want to do (switch the outlet on/off) and can safely do the wiring but didn't know the terminology or correct transformer.
I will return this one and get a 240/24v one.
I can buy a replacement switch/thermostat from Marley but they want north of $200 for it.

 

[fitter30]

20 va should be plenty for a two pole 40 amp contactor.

 

[jlv03]

You could skip the transformer and contactor and use an all-in-one: https://www.amazon.com/dp/B08VRW52NQ?tag=atomicindus08-20

 

[Ultradog MN]

You could skip the transformer and contactor and use an all-in-one: https://www.amazon.com/dp/B08VRW52NQ?tag=atomicindus08-20

Now you tell me
I bought the parts yesterday...

 

[wyliesdiesels]

I have a portable Marley 220v 3000w electric heater that I heat my little shop office with.
Heats good but the thermostat on it is fubar.
I want to use a 220v 2 pole contactor, a transformer and a remote thermostat to regulate it.
My transformer is 110 but has two places to hook to. 8 or 16
Question:
Do I run a neutral to power the transformer and use the 16 setting or can I run it 220v and use the 8 setting to go to the thermostat?
Thanks

none of that will work for a 24v coil

first off the transformer and its windings are rated for 120v (there is no 110v in the US anymore) so if you apply 240v (220v doesnt exist), you could stress the insulation on the windings.

but lets say thats not an issue and you connect 240v to it. This will cause the outputs to double. The 8v terminal will now give you 16v and the 16v terminal will now give you 32v. how will this work for a 24v rated coil?

and why would you want to power a 120v rated transformer with 240v?

why not just feed the ****** 120v and use the 24v output?

 

[wyliesdiesels]

Doh.
Good question that I don't know. Was sold to me as 220 and I assumed they were correct. Doesnt say so on the box though does it. Generally though, wouldn't a 2 pole be for 220?

not sure why someone is telling you a 600v rated contactor is rated for 220 (240). or that the coil voltage would be 240 when its clearly labeled on the box.

no 2 pole doesnt automatically mean the coil voltage is the same rating as the contactor rating.

 

[wyliesdiesels]

It might handle the 240v ok, but that 24v output would have 48 on it

the insulation on the windings may not be ok...

 

[wyliesdiesels]

Thanks fellas.
I know what I want to do (switch the outlet on/off) and can safely do the wiring but didn't know the terminology or correct transformer.
I will return this one and get a 240/24v one.
I can buy a replacement switch/thermostat from Marley but they want north of $200 for it.

you could use the transformer you have if the 20va is enough for the coil in the contactor.

 

[Ultradog MN]

I swear I was NOT making a doorbell joke with my post...

Second time reading this thread I finally get the joke.
Being an inveterate jokester and punster myself I must admit I had to laugh at yours - even if I am the **** of it.
Thanks

 

[PCustoms]

Second time reading this thread I finally get the joke.
Being an inveterate jokester and punster myself I must admit I had to laugh at yours - even if I am the **** of it.
Thanks

I couldn't have made that joke if I tried.

I was reading it originally and was thinking "why the hell can't I remember what those transformers are for, I know I've seen that voltage combo before..."