Taco SR503-EXP

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Table of Contents

Table of Contents1
Product Information3
Switching Relay Wiring4
Safety Notice5
How to Check for Two Power Sources5
How to Correct the Wiring5
Table of Contents6
Switching Relay Controlling Another Switching Relay7
Two Switching Relays Connected Together9
Vac 120V Relay Power9
End Switch9
Fuse 1 Amp9
Priority Zoning Circulator Controlling Switching Relay10
Vac Input14
Vac14
- SR501-EXP Switching Relay Controlling a ZVC404/406 Zone Valve Control15
- 2 Expandable Switching Relays Connected Together16
Zc Zr16
Volt Circulators Input16
Zone1 Zone2 Zone3 Zc H X1 Zr16
Fuse 1 Amp16
Volt Circulators16
Vac Input16
- 2 Indirect Water Heaters Connected to Standard Switching Relays17
- 2 Indirect Water Heaters W/ Priority Connected to EXP Switching Relays18
- PC700 Boiler Reset Control Connected to SR501-EXP Switching Relay19
- SR501-EXP/PC700 Boiler Reset Control Connected to a Switching Relay20
- Connecting a DHW Heater to an Existing Heating Only Switching Relay20
Thermostat20
- SR501-EXP/PC700 Boiler Reset Control Connected to a Zone Valve Control21
- Connecting a DHW Heater to an Existing Heating Only Zone Valve Control21
- SR501-EXP/PC700 Boiler Reset Control Connected to Tankless Coil Boiler22
- PC700 Boiler Reset Control Connected to EXP Switching Relay23
- PC702 2–Stage Boiler Reset Control Connected to EXP Switching Relay24
- PC705 Pump Injection Control Connected to EXP Switching Relay25
- PC700 Boiler Reset Control Connected to 2 EXP Switching Relays26
- PC702 2–Stage Boiler Reset Control to 2 EXP Switching Relays27
- PC705 Pump Injection Control Connected to 2 EXP Switching Relays28
- PC700 and PC705 Controls Connected to 2 EXP Switching Relays29
- PC702 and PC705 Controls Connected to 2 EXP Switching Relays30
- ZVC403/405 with System Pump31
- ZVC404/406 with System Pump32
- ZVC404/406 with Domestic Hot Water (DHW) Pump33
- ZVC404/406 with System and DHW Pumps34
- ZVC404/406 with System, DHW and Secondary Pumps35
- 2 ZVC404/406 Connected Together with Priority36
- 2 EXP Zone Valve Controls Connected Together with System Pump37
- 2 EXP Zone Valve Controls Connected Together with DHW Pump38
- 2 EXP Zone Valve Controls Connected Together with System and DHW Pumps39
- 2 EXP Zone Valve Controls Connected W/ System/Dhw/Secondary Pumps40
- PC700 Boiler Reset Control Connected to EXP Zone Valve Control41
- 2–Stage Boiler Reset Control Connected to EXP Zone Valve Control42
- Pump Injection Control Connected to EXP Zone Valve Control43
- PC700 Boiler Reset Control Connected to 2 EXP Zone Valve Controls44
- 2–Stage Boiler Reset Control Connected to 2 EXP Zone Valve Controls45
- Pump Injection Control Connected to 2 EXP Zone Valve Controls46
- PC700 and PC705 Connected to 2 EXP Zone Valve Controls47
- PC702 and PC705 Connected to 2 EXP Zone Valve Controls48
- HAFC101 with 1 Speed Air Handler49
- HAFC101 with 2 Speed Air Handler50
- HAFC201 with 1 Speed Air Handler51
- HAFC201 with 2 Speed Air Handler52
- Multiple Hafc’s and Switching Relay53
- 3 Wire Thermostat Connected to TACO Switching Relay54
- 3 Wire Thermostat Connected to TACO Zone Valve Control54
- White-Rogers 1361 Hydronic Zone Valve with TACO Zone Valve Control55
- Honeywell VC 40 & 80 Hydronic Zone Valve W/ TACO Zone Valve Control56
- 570 Zone Valve to Switching Relay57
- Zone Valve Control Using Priority Zoning Circulator58
- Radiant Mixing Block (RMB)59
- Radiant Mixing Block, Single Zone59
- Radiant Mixing Block Connected to Zone Valve Control60
- Radiant Mixing Block Connected to 2 EXP Switching Relays with DHW Pump60
- X - Pump Block (XPB)61
- X - Pump Block, Single Zone61
- X - Pump Block Connected to Zone Valve Control62
- X - Pump Block Connected to 2 SR502/503 Switching Relays62
- X-Pump Block63
- Typical Snow Melt Installation63
- Typical Radiant Floor to Water Heater Installation63
- Iseries Mixing Valve64
- Ivalve, 2-Way Injection, Single Zone64
- Ivalve, 3-Way Mixing Working with Switching Relay with DHW Priority65
- Ivalve, 4-Way Mixing Working with Zone Valve Control65
- Wiring for Boilers with Honeywell Control Center66
- Wiring Boilers with a United Technologies Integrated Control Module67
- Wiring Boilers with a United Technologies Ucontrol67
- Wiring Taco LN and LTA-2 Series Low Water Cutoffs68
- Wiring Taco LT Series (1St Generation, -1) Low Water Cutoffs69
- Wiring Taco LF Series Low Water Cutoffs70
- Taco Low Water Cutoff Replacement Guide71
- Taco LF Series 120 Volt LWCO Competitive Wiring Cross Reference72
- Taco LF Series 24 Volt LWCO Competitive Wiring Cross Reference73
- Taco LTA-2 Series 120 Volt LWCO Competitive Wiring Cross Reference74
- Taco LTR/LTA-2 Series 24 Volt LWCO Competitive Wiring Cross Reference75
- Wiring Taco LF Series Low Water Cutoffs to Taco Electric Water Feeder76
- Wiring 24VAC Electric Water Feeder to Taco LF Series Low Water Cutoff77
- Wiring 24VAC Low Water Cutoff to Uni-Match Electric Water Feeder78
- Wiring 120VAC Low Water Cutoff to Uni-Match Electric Water Feeder78
- Wiring 24VAC Low Water Cutoff to Hydrolevel VXT-24 Water Feeder79
- Wiring 120VAC Low Water Cutoff to Hydrolevel VXT-24 Water Feeder79
- Wiring 24VAC Low Water Cutoff to Programmable Water Feeder80
- Wiring 120VAC Low Water Cutoff to Programmable Water Feeder80
- Low Water Cutoff and Taco Electric Water Feeder Wiring Cross Reference81
- Aquastat Wiring82
- Aquastat Wiring83
- Wiring for Boilers with Honeywell Aquastat Model L8124E or Equivalent87
- Wiring for Boilers with Honeywell Aquastat Model L8148E or Equivalent87
- Aquastat Wiring to 24VAC Low Water Cutoff88
- Aquastat Wiring to 120VAC Low Water Cutoff88
- Instruction Sheet - SR501 Switching Relay89
- Instruction Sheet - SR501-845RP Universal Replacement Relay90
- Instruction Sheet - SR502 & SR503 Switching Relay91
- Instruction Sheet - SR504 & SR506 Switching Relay92
- Instruction Sheet - SR501-EXP Switching Relay93
- Instruction Sheet - SR503-EXP, SR504-EXP & SR506-EXP Switching Relay94
- Instruction Sheet - ZVC403 & ZVC405 Zone Valve Control95
- Instruction Sheet - ZVC404 & ZVC406 Zone Valve Control96
- Instruction Sheet - ZVC404-EXP & ZVC406-EXP Zone Valve Control97
- Instruction Sheet - Hydro Air Fan Controls98
- Instruction Sheet - PC600 Post Purge Timer Plug-In Powerport Card99
- PC605 Priority Protection Plug-In Powerport Card99
- PC610 Pump Exercise and Timer Plug-In Powerport Card99
- Standard Terms and Definitions100
- TACO Zone Controls Cross-Reference101

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