Wiring Guide

TACO Zone Control Product Information
Switching Relays
Product No. Description
SR501-4 1 Zone Switching Relay
SR501-HC-4 1 or 2 Zone Switching Relay, High Current Capacity
SR501-OR-4 1 Zone Switching Relay with Outdoor Reset
SR502-4 2 Zone Switching Relay with Priority
SR503-4 3 Zone Switching Relay with Priority
SR504-4 4 Zone Switching Relay with Priority
SR506-4 6 Zone Switching Relay with Priority
Expandable Switching Relays – Expandable to 120 Zones (20 Zoning Panels)
Product No. Description
SR501-EXP-4 1 Zone Switching Relay
SR503-EXP-4 3 Zone Switching Relay with Priority
SR504-EXP-4 4 Zone Switching Relay with Priority
SR506-EXP-4 6 Zone Switching Relay with Priority
Zone Valve Controls
Product No. Description
ZVC403-4 3 Zone Valve Control with Priority
ZVC404-4 4 Zone Valve Control with Priority
ZVC405-4 5 Zone Valve Control with Priority
ZVC406-4 6 Zone Valve Control with Priority
Expandable Zone Valve Controls – Expandable to 120 Zones (20 Zoning Panels)
Product No. Description
ZVC404-EXP-4 4 Zone Valve Control with Priority
ZVC406-EXP-4 6 Zone Valve Control with Priority
Add-On Power Controls (For use with all -EXP controls)
Product No. Description
PC700 Boiler Reset Control
PC702 2-Stage Boiler Reset Control
PC705 Variable Speed Pump Injection Mixing Control
Fan Controls
Product No. Description
HAFC101-4 Hydro Air Fan Control
HAFC201-4 Hydro Air Fan Control with Optional Time Delays
Do it once.
Do it right.