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Part Number PLUS-E017-A/1206
PLUS LINE
Indirect-Fired Water Heaters – Series 3
wirinG requirements ..............................................................................................47
Wiring requirements — Circulators ........................................................................... 47
Wiring requirements — Zone Valves ......................................................................... 47
Boiler models requiring domestic priority with GOLD Plus 30 ................................ 47
ZoninG with pumps:
Zoning with Weil-McLain circulator zone controller (WMCR)
• Weil-McLain circulator zone controller ................................................................... 48
Other options for for zoning with pumps
• Using priority zone pump ....................................................................................... 49
• Using pump relays • Domestic priority with priority relay ................................ 50
• Using pump relays • No domestic priority ......................................................... 51
• Pumps relays • Domestic priority with 3-way priority valve & priority relay .... 60
ZoninG with Zone vAlves:
Zoning with Weil-McLain zone valve controller (WMZV)
• Domestic priority optional (controller switch) ....................................................... 52
Zoning with 4-wire zone valves
• No domestic priority ............................................................................................... 53
• With or without priority • GOLD Plus 30/40/60/80 or Plus 40/60/80 ......... 55
• With domestic priority • PLUS 100/110/119 ....................................................... 57
• With domestic priority using 2-way priority valve • PLUS 100/110/119 ........... 58
Zoning with 3-wire zone valves
• No domestic priority ............................................................................................... 54
• With or without priority • GOLD Plus 30/40/60/80 or Plus 40/60/80 ......... 56
• With domestic priority • PLUS 100/110/119 ....................................................... 57
• With domestic priority using 2-way priority valve ................................................. 59
Boiler-side wiring & controls (except Gas)D
This section provides suggested boiler-side wiring and control suggestions for boilers covered
in Section C of this manual. Section D does not apply to Gas-fired boilers, covered in
Section B. In Section D, you will find suggested wiring for:
• zoning with zone valves
• zoning with circulators
• wiring with and without domestic priority
• using separate relays or zone controllers
Make sure to use a compatible piping method as shown in the Section C. (Each wiring diagram
lists compatible piping alternatives.)