[PDF] TACO ZONE CONTROLS WIRING GUIDE TACO ZONE CONTROLS WIRING GUIDE Pages Switching Relays – Single Zone Wiring 2 – 2 ZVC404-EXP 4 Zone Valve Control with Priority and 2 PowerPorts When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a Related searches for 4 wire zone valve wiring diagram 4 wire fan wiring diagram3 wire plug wiring diagram4 wire receptacle wiring diagram5 wire relay wiring diagram3 wire alternator wiring diagramfour wire thermostat wiring diagram4 wire motor diagram4 way wire diagram