Have HVAC Questions? Ask an HVAC Expert for Answers
I will be referring to this manual tell me if it looks like your boiler or not,
That is a steam boiler however, it should not need any aguastat controller at all if it comes with all of the control devices shown on the wiring diagram
If it is being used as a hot water boiler however you would fit an aguastat as shown here below
any and all work on a steam boiler should be checked by a licensed boiler contractor
Thanks for letting me work with you. When we are finished,if my answer has been polite, professional, and thorough,please locate the 'rate your expert button' and click one of the ratings .If you still need help let me know!.
Rating will not increase your charges, nor close the question, but is how I earn my living.