Taco SR504

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 SR504 Specifications

General

Zones	4
Enclosure	NEMA 1
Voltage	120 VAC
Mounting	Wall mount
Operating Temperature	0°F to 100°F

Summary

Taco Zone Control Product Information

Switching Relays

Zone Valve Controls

Safety Notices and Wiring Correction

Safety Notice

General safety warnings regarding electrical connections and potential hazards.

How to Correct Wiring Issues

Guidance on correcting wiring to prevent secondary power sources and ensure safety.

Aquastat Wiring Diagrams

Honeywell L8124 Series Aquastat Wiring

Honeywell L8148 Series Aquastat Wiring

Instruction Sheets: Switching Relays

SR501 Switching Relay

Instructions for wiring the SR501 switching relay.

SR502 & SR503 Switching Relay

Instructions for wiring SR502 and SR503 switching relays.

SR504 & SR506 Switching Relay

Instructions for wiring SR504 and SR506 switching relays.

SR-EXP Switching Relays

Instructions for wiring SR501-EXP, SR503-EXP, SR504-EXP, SR506-EXP relays.

Instruction Sheets: Zone Valve Controls

ZVC403 & ZVC405 Zone Valve Control

Instructions for wiring ZVC403 and ZVC405 zone valve controls.

ZVC404 & ZVC406 Zone Valve Control

Instructions for wiring ZVC404 and ZVC406 zone valve controls.

ZVC-EXP Zone Valve Controls

Instructions for wiring ZVC404-EXP and ZVC406-EXP zone valve controls.

Instruction Sheets: PowerPort Cards

PC600 Post Purge Timer

PC605 Priority Protection

PC610 Pump Exercise and Timer