Weil-McLain PLUS-E017-A/1206 manual Figure Typical wiring, System piping

Manual • Installation • Start-Up • Usage • Maintenance • Parts

D Boiler-side wiring & controls (except Gas)  continued

Figure 41

Typical wiring:

•Zoning with 3-wire zone valves

•With domestic priority using 2-way priority valve

•Also refer to Weil-McLain Boiler Zone Wiring Guide for further details.

•Refer to Wiring requirements on page 47.

System piping —

Apply this wiring to systems in:

•Figure 23, page 39 (using 2-way water heater zone valve and 2- way priority valve)

High voltage H 120 N

	Transformer	V.A.C.
	(Power)
		24
		V.A.C.
	Room		Zone valve
	thermostat
Zone 1
	Room
	Thermostat
Zone 2
		Zone
		valve
Additional	Additional zones may
	be added as shown above
zones
			Priority valve

C

NC 2

NO 1

Water heater thermostat Snap Set

Water heater

* Use Isolation Relay onzone 3-wire zone valves with

non-isolated end switches. Transformer and boiler control can burn out if Isolation Relay is not used.

Low voltage boiler field wiring
Low voltage (24 vac) field wiring
High voltage (120 vac) field wiring H	N

	Contact not
Priority relay	used

Water heater zone valve

✱ Isolation relay

Boiler thermostat

terminals 500075-30b

Notes	1.	These drawings are conceptual only. They show representative piping components and
		layout. Weil-McLain does not represent that the drawings meet any particular mechanical
		or building codes. The installer is responsible for inclusion of all required safety devices, or
		other miscellaneous piping hardware not shown on drawings. The installer is responsible
		for proper sizing/selection of all hardware shown on this diagram.
	2.	Follow component manufacturer’s instructions for installation of all items shown.
	3.	See Weil-McLain installation instructions for specific details on installing the boiler.

Part Number PLUS-E017-A/1206 59