Taco ZVC403

TACO ZONE CONTROLS WIRING GUIDE
Pages
Switching Relays – Single Zone Wiring 2 – 2
Switching Relays – Oil Boiler Wiring Safety Notice 2 3– 4
Switching Relays – N
ON EXP Connected Together with Priority 5 – 11
Switching Relays – EXP Connected Together with Priority 12 – 14
Switching Relays – Multiple Indirect Hot Water Heaters 15 – 16
Switching Relays – EXP Connected To Reset Controls (PC700, 702 & 705) 17 – 28
Zone Valve Controls – N
ON EXP Connected Together with Priority 29 – 34
Zone Valve Controls – EXP Connected Together with Priority 35 – 38
Zone Valve Controls – Connected To Reset Controls (PC700, 702 & 705) 39 – 46
Hydro Air Fan Controls (HAFC 101 & 201) 47 – 51
Specialty Thermostat and Zone Valve Wiring 52 – 56
Radiant Mixing Block 57 – 58
X-Pump Block 59 – 61
iSeries Mixing Valves 62 – 63
Low Water Cutoffs and Electric Water Feeders 64 – 79
Aquastat Wiring 80 – 86
Instruction Sheets 87 – 97
Standard Terms and Definitions – 98
Cross Reference 99 – 100
Do it once.
Do it right.
© Taco Catalog No. 100-9.0 Effective Date: July 1, 2010
Supersedes Date: July 1, 2007

Taco ZVC403 Specifications

General

Model	ZVC403
Type	Zone Valve Control
Voltage	24VAC
Max Zones	3
Transformer	40 VA
Input Voltage	120 VAC
Thermostat Compatibility	24 VAC
Control Output	24 VAC
Operating Temperature	32°F to 104°F (0°C to 40°C)
Enclosure Rating	NEMA 1

Summary

Taco Zone Control Product Catalog

Switching Relays

Overview of Taco's various switching relay models.

Zone Valve Controls

Overview of Taco's zone valve control units.

Fan Controls

Overview of Taco's Hydro Air Fan Control units.

SR501 Switching Relay Wiring and Operation

SR501 Switching Relay Wiring

Wiring diagrams for the SR501 switching relay.

SR501 Switching Relay Instruction Sheet

Detailed features, operation, and installation of SR501.

Safety and Reference Information

Safety Notices

Critical safety warnings and procedures for installation.

Standard Terms and Definitions

Glossary of HVAC control terminology.

Zone Controls Cross-Reference

Compatibility guide for Taco Zone Controls and competitors.

Advanced System Wiring and Integration

Interconnected Switching Relays and Zone Valves

Wiring diagrams for complex multi-relay/valve systems.

Boiler Reset and Aquastat Control Wiring

Wiring diagrams for PC700 controls and aquastats.