boiler
i have completed most of the connections to the boiler expect for
Zone values, Thermostat and low pressure monitoring.
i need help with understanding if i need to purchase a 24v transformer ? and how to serial connect the wiring with regard to zones valves, thermostat and low pressure monitoring.
After glancing through the White-Rodgers 1361 zone valve Installation Instructions, I'd say the C wire should be attached to terminal 1. While R should attach to 5, and W should attach to 4.
It’s possible you don’t need a C (common neutral) wire when installing your Ecobee3. Check out the guide on using the Power Extension Kit that comes with your new thermostat: https://www.ecobee.com/faq/i-do-not-have-a-c-wire-or-common-wire-can-i-install-ecobee-residential-thermostats/
Best Answer
First things first, you'll need a transformer to step power down from 120 volts to 24 volts. Next, you'll obviously need a zone valve. You'll also need a thermostat, to actually determine when the heat should come on. You'll need a thermostat and zone valve for each zone, but a transformer should be able to supply a few zones.
Start by connecting one of the yellow leads from all the zone valves, to one of the leads from the transformer. Next connect a wire from the
Rterminal of each thermostat, to the other transformer lead. Connect the other yellow lead from each zone valve, to theWterminal of the corresponding thermostats.Gather up one of the red leads from each of the zone valves, and connect them to one of the
Heating T-Statterminals in the boiler (using a pigtail is the proper way to do this, as you're only allowed one wire under screw terminals. Gather up all the other red leads from the zone valves, and connect them to the otherHeating T-Statterminal in the boiler.Example wiring for a single zone
That's it. Now when a thermostat calls for heat, it will open the appropriate valve, and signal the boiler.