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General| Model | SR501 |
|---|---|
| Category | Control Unit |
| Input Voltage | 120 VAC |
| Frequency | 60 Hz |
| Switch Type | SPDT |
| Enclosure Rating | NEMA 1 |
| Type | Relay |
| Operating Temperature | 0°C to 40°C |
| Relay Output | 24 VAC |
Lists Taco switching relays with product numbers and descriptions.
Lists expandable switching relays with PowerPort options.
Lists Taco zone valve controls with product numbers and descriptions.
Lists expandable zone valve controls with PowerPort options.
Lists plug-in cards for -EXP controls.
Lists add-on power controls for -EXP controls.
Lists Taco Hydro Air Fan Controls.
Safety notice regarding servicing oil boilers and switching relays.
Steps to check for dual power sources in oil boiler systems.
Instructions on correcting wiring to avoid secondary power sources.
Diagram for typical SR501 switching relay wiring.
Diagram for alternative SR501 switching relay wiring.
Explanation of SR501 switching relay terminals.
Technical specifications for the SR501 switching relay.
Diagram for typical SR501-845RP replacement relay wiring.
Diagram for alternative SR501-845RP replacement relay wiring.
Explanation of SR501-845RP relay terminals.
Technical specifications for SR501-845RP relay.
Wiring diagram for SR502/503 in cold start applications.
Wiring diagram for SR502/503 in tankless coil applications.
Technical specs for SR502/503 switching relays.
Wiring diagram for SR504/506 in cold start applications.
Wiring diagram for SR504/506 in tankless coil applications.
Technical specs for SR504/506 switching relays.
Wiring diagram for SR501-EXP in cold start applications.
Wiring diagram for SR501-EXP in tankless coil applications.
Technical specs for SR501-EXP switching relay.
Wiring diagram for SR503-EXP/SR504-EXP/SR506-EXP in cold start.
Wiring diagram for SR503-EXP/SR504-EXP/SR506-EXP in tankless coil.
Technical specs for SR503-EXP, SR504-EXP, SR506-EXP relays.
Wiring diagram for ZVC403/ZVC405 Zone Valve Controls.
Diagram for optional system circulator installation.
Technical specs for ZVC403/ZVC405 Zone Valve Controls.
Wiring diagram for ZVC404/ZVC406 Zone Valve Controls.
Diagram for optional system/DHW circulator installation.
Technical specs for ZVC404/ZVC406 Zone Valve Controls.
Wiring diagram for ZVC404-EXP/ZVC406-EXP Zone Valve Controls.
Diagram for optional system/DHW circulator installation.
Technical specs for ZVC404-EXP/ZVC406-EXP Zone Valve Controls.
Explanation of HAFC101/201 operation and interface.
Details on HAFC201's selectable delays and pump exercise.
Technical specifications for HAFC101 and HAFC201.
Functionality of the PC600 Post Purge Timer card.
Steps for installing the PC600 Post Purge Timer card.
Functionality of the PC605 Priority Protection card.
Steps for installing the PC605 Priority Protection card.
Functionality of the PC610 Pump Exercise and Timer card.
Steps for installing the PC610 Pump Exercise and Timer card.
Cross-reference for Taco switching relays to other brands.
Cross-reference for expandable switching relays.
Cross-reference for Taco zone valve controls.
Cross-reference for expandable zone valve controls.
Cross-reference for plug-in power port cards.
Cross-reference for add-on power controls.
Cross-reference for Taco Hydro Air Fan Controls.
