wiring a steam boiler


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Old 11-15-07, 10:35 AM
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wiring a steam boiler

cross-posted on heatinghelp.com
My daughter has a Weil-McLain steam boiler (very old). She called me to say the glass gauge was leaking. I replaced the gaskets, but discovered that there is no low water cutoff installed. Either it was removed by the previous homeowner or it was never installed.Regardless, I will be installing one and I'm wondering what the exact wiring sequence should be.There's a PressurTrol, the Low-water, the fire-o-matic on the ceiling and the primary control on the oil burner.Any help would be appreciated
 
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Old 11-15-07, 05:26 PM
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The low-water cut off needs to be wired into the "limit" circuit of the main controller.

Tell us what the manufacturer and model number is of every electrical control on your boiler.
 
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Old 11-15-07, 06:47 PM
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Question I'm Confused

You say there is no low water cut-off. Yet when you list the controls, you mention a "low water". By "low water" do you mean the water feeder?
 
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Old 11-16-07, 06:03 AM
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i'm referring to the LWCO that i will be installing.
Not sure of the model numbers. They're all Honeywell controls. I just need the proper sequence of wiring, i.e: from the fire-o-matic to the pressurtroll to the LWCO then to primary. There still exists the old stack switch which someone just cut the wires inside it, so i need to re-wire everything because it's such a rats nest.
 
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Old 11-16-07, 06:07 AM
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there is no water feeder........sorry
 
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Old 11-16-07, 10:07 PM
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Wiring Diagrams

There are several wiring diagrams included in this manual:

http://www.crownboiler.com/manuals/c...structions.pdf
 
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Old 11-19-07, 05:37 AM
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great!!! That's EXACTLY what I was looking for........Thanks, Grady!!
 
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Old 11-19-07, 09:19 PM
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Glad it helped

When you get done wiring, make sure to check the operation of the low water cut off & other safety devices. Be safe.
 
 

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