HVAC
Plumbing
ELECTRICAL
Tools & Test Instruments
Taco SR503-EXP-4 3 Zone Switching Relay w/ Priority
Taco Switching Relays combine clearly labeled PC board layouts with advanced features that allow for total system customization. Whether using basic priority switching or the advanced features of the -EXP controls, the job is made easy. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups. All switching relays are UL and CSA listed, use standard ?ice cube? replaceable relays and are compatible with conventional and programmable thermostats.
Whether you want to expand up to 20 zones or utilize the advanced features of the PowerPort Cards and Add-on Power Controls, Taco -EXP controls allow for simple integration of advanced features. Plug in any combination of cards and controls to optimize the operation of any system.
Features include:
Whether you want to expand up to 20 zones or utilize the advanced features of the PowerPort Cards and Add-on Power Controls, Taco -EXP controls allow for simple integration of advanced features. Plug in any combination of cards and controls to optimize the operation of any system.
Features include:
- External Indicator Lights
- Switchable Priority
- Simplified Wiring
- Fully Enclosed Snap-Out Relays
- Compact Design
- Fuse Protected
- 100% Factory Tested
- Isolated End Switch
- Contractor Friendly PC Board Layout
- Universal Thermostat Compatibility
- UL and CSA Approved
- 24 Volt Power Input or Output Terminal
- Extended 3 Year Warranty
- Made in the USA
- Plug-in PowerPort Card Slots
- Add-on Power Control Plug
- Expandable to 20 Zones
- Interface with -EXP Zone Valve Controls
$267.50 USD
SPECIFICATIONS
| Application | Zoning | |
| Voltage | 120V | |
| Nomber of Zones | 3 | |
| Amperage | 20 | |
| Power Control Plugs | 1 |
| Power Method | 120 VAC Input | |
| Depth (Inches) | 2-3/4'' | |
| Height ( Inches) | 7'' | |
| Widht (Inches) | 10-1/4'' |