Taco SR503-EXP-4
3 ZONE EXPANDABLE SWITCHING
SKU
598854
Taco®, SR503-EXP-4, Switching Relay, Expandable, Series: SR, 120 VAC, 20 A, 1/3 hp Power, 60 Hz Frequency, 120 VAC Coil, DPDT Contact Form, Screw Hole Mounting, 240 deg F, 6-3/4 in H x 10-1/4 in W x 2-3/4 in D Dimensions, Domestic
- External indicator lights
- Fully enclosed snap-out relays
- 24 V power input or output terminal
- Front Diagnostic Lights
- Switchable Priority
- Simplified Wiring
- Built-in Priority Protection
- Compact Design
- Fuse Protected
- 100% Factory Tested
- Isolated End Switch
- Contractor Friendly PC Board Layout
- Universal Thermostat Compatibility
- 24 Volt Power Output for hard wired thermostats
- Field Replaceable Transformer
- Add-on Power Control Plug
- Built-in, Post Purge and Pump Exercise Functions
- Switchable Primary Circulator Output
- Two boiler contacts, utilizes full functionality of Mod-Con boilers
- Interface with -EXP Zone Valve Controls
| Dimensions | 6-3/4 in H x 10-1/4 in W x 2-3/4 in D |
|---|---|
| Series | SR |
| Frequency Rating | 60 Hz |
| Mounting Type | Screw Hole |
| Power Rating | 1/3 hp |
| Contact Form | DPDT |
| Amperage Rating | 20 A |
| Coil Voltage | 120 VAC |
| Type | Expandable |
| Temperature Rating | 240 deg F |
| Domestic/Import | Domestic |
| Voltage Rating | 120 VAC |
| Brand | Taco |
