Taco PC700

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 PC700 Specifications

General

Brand	Taco
Model	PC700
Category	Control Unit
Language	English

Summary

Switching Relays

Single Zone Wiring

Wiring diagram for SR501 single zone switching relay.

Oil Boiler Wiring Safety Notice

Safety precautions for wiring switching relays with oil boilers.

NON EXP Connected Together with Priority

Wiring diagrams for connecting multiple NON-EXP switching relays.

EXP Connected Together with Priority

Wiring diagrams for connecting multiple EXP switching relays.

Multiple Indirect Hot Water Heaters

Wiring diagrams for switching relays with indirect water heaters.

EXP Connected To Reset Controls (PC700, 702 & 705)

Wiring diagrams for EXP switching relays with boiler reset controls.

Multiple HAFCs and Switching Relay

3 Wire Thermostat Connected to TACO Switching Relay

570 Zone Valve to Switching Relay

Zone Valve Controls

NON EXP Connected Together with Priority

Wiring diagrams for connecting multiple NON-EXP zone valve controls.

EXP Connected Together with Priority

Wiring diagrams for connecting multiple EXP zone valve controls.

PC700 Boiler Reset Control Connected To EXP Zone Valve Control

Wiring diagram for EXP zone valve control with PC700 boiler reset control.

PC702 2-Stage Boiler Reset Control Connected To EXP Zone Valve Control

Wiring diagram for EXP zone valve control with PC702 boiler reset control.

PC705 Variable Speed Pump Injection Control Connected To EXP Zone Valve Control

Wiring diagram for EXP zone valve control with PC705 pump injection control.

PC700 Boiler Reset Control Connected To 2 EXP Zone Valve Controls

Wiring diagrams for 2 EXP zone valve controls with PC700 boiler reset control.

PC702 2-Stage Boiler Reset Control Connected To 2 EXP Zone Valve Controls

Wiring diagrams for 2 EXP zone valve controls with PC702 boiler reset control.

PC700 and PC705 Controls Connected to 2 EXP Zone Valve Controls

Wiring diagrams for 2 EXP zone valve controls with PC700 and PC705 controls.

PC702 and PC705 Controls Connected to 2 EXP Zone Valve Controls

Wiring diagrams for 2 EXP zone valve controls with PC702 and PC705 controls.

3 Wire Thermostat Connected to TACO Zone Valve Control

White-Rogers 1361 Hydronic Zone Valve with TACO Zone Valve Control

Honeywell VC 40 & 80 (spdt) Hydronic Zone Valve with TACO Zone Valve Control

Zone Valve Control with 1 Low Temperature Zone Using Priority Zoning Circulator

Hydro Air Fan Controls (HAFC 101 & 201)

HAFC101 with 1 Speed Air Handler

Wiring diagram for HAFC101 with a 1-speed air handler.

HAFC101 with 2 Speed Air Handler

Wiring diagram for HAFC101 with a 2-speed air handler.

HAFC201 with 1 Speed Air Handler

Wiring diagram for HAFC201 with a 1-speed air handler.

HAFC201 with 2 Speed Air Handler

Wiring diagram for HAFC201 with a 2-speed air handler.

Radiant Mixing Block

Radiant Mixing Block (RMB)

Radiant Mixing Block, Single Zone

Radiant Mixing Block Connected to Zone Valve Control with System Pump Wired off the RMB

Radiant Mixing Block Connected to 2 EXP Switching Relays with DHW Pump

X-Pump Block

X - Pump Block (XPB)

X - Pump Block, Single Zone

X - Pump Block Connected to Zone Valve Control

X - Pump Block Connected to 2 SR502503 Switching Relays

Typical Radiant Floor to Water Heater Installation

Typical Snow Melt Installation

iSeries Mixing Valves

iSeries Mixing Valve

iValve, 2-Way Injection, Single Zone

iValve, 3-Way Mixing Working with SR502503 Switching Relay with DHW Priority

iValve, 4-Way Mixing Working with Zone Valve Control

Low Water Cutoffs and Electric Water Feeders

Wiring for Boilers with Honeywell Control Center Model R8285 or Equivalent

Wiring diagrams for boilers with Honeywell R8285 control center.

Wiring Taco LN and LTA-2 Series Low Water Cutoffs

Wiring diagrams for Taco LN/LTA-2 LWCOs using burner or external power.

Wiring Taco LT Series (1 st generation, -1) Low Water Cutoffs

Wiring diagrams for Taco LT Series LWCOs using burner or external power.

Wiring Taco LF Series Low Water Cutoffs

Wiring diagrams for Taco LF Series LWCOs using burner or external power.

Wiring Taco LF Series Low Water Cutoffs to Taco Electric Water Feeder

Wiring diagrams for Taco LF LWCOs to electric water feeders.

EWF Standard Wiring

Standard wiring for Taco LF LWCOs to Taco EWF feeders.

EWF Alternate Wiring

24 VAC LWCO Using Burner Circuit Power Source

120 VAC LWCO Using Burner Circuit Power Source

Aquastat Wiring

HONEYWELL L8124 A & C OR EQUAL

HONEYWELL L8124 B OR EQUAL

HONEYWELL L8124 E OR EQUAL

HONEYWELL L8124 G & L OR EQUAL

HONEYWELL L8124 M OR EQUAL

HONEYWELL L8148 A OR EQUAL

HONEYWELL L8148 E OR EQUAL

HONEYWELL L8148 J OR EQUAL

HONEYWELL L8182 D OR EQUAL

Wiring for Boilers with Honeywell Aquastat Model L8124 E or Equivalent

Wiring for Boilers with Honeywell Aquastat Model L8148 E or Equivalent

Aquastat Wiring to 24 VAC Low Water Cutoff

Aquastat Wiring to 120 VAC Low Water Cutoff