I just got a new boiler brand williamson-owt- -3 sections-In the electrical diagram it is not clear the voltage for the connection to the upstairs thermostat. The old boiler and thermostat had a wire with 120 volts coming down to the boiler in the basement. you can see the manual for my new boiler at this address...Williamson Boilers (http://www.williamson-thermoflo.com/boilersw.htm#owt..in) page #13 of the boiler manual you can see the electrical diagram for the owt boiler that I have.

Specific question.. Can I connect the 120 volt wire coming down from the thermostat to the connection shown on the page 13 as "Thermostat or end switch".. it says in its legend "low voltage field wiring"
Thanks