Taco SR504-EXP-1 4-Zone Circulator Relay with Expansion Capabilities and Data Port

Description

Overall, the Taco SR504-EXP-1 offers a compact and expandable control solution for multi-zone hydronic heating systems. Its priority function, diagnostic lights, compatibility with various valve types, and expansion capabilities make it a versatile choice for efficient and customizable temperature control.

Function:

• Controls water flow to 4 zones: Manages hot water circulation to individual zones in a hydronic heating system, ensuring efficient temperature control in different areas.
• Activates and deactivates a circulator pump: Ensures continuous water circulation when needed, optimizing system performance.
• Expandable for up to 120 zones: Can be linked with additional SR504-EXP-1 or SR506-EXP units to accommodate larger systems with more zones.

Key Features:

• 4-zone capacity (expandable): Suitable for small to medium multi-zone systems, with the flexibility to expand as needed.
• Switchable priority: Prioritizes one zone over others, ensuring immediate comfort or addressing critical areas when activated.
• External diagnostic lights: Facilitate troubleshooting by indicating system status and zone operation.
• Compact design: Optimizes space utilization in control panels.
• Compatible with various valve types: Works with 2-, 3-, or 4-wire zone valves for flexibility in system design.
• Built-in power ports for optional add-ons: Provides flexibility for future additions like a priority circulator or power vent controls.

Applications:

• Hydronic heating systems: Ideal for radiant, baseboard, or fan coil systems in residential and light commercial settings.
• Closed cooling circuits: Can be used for zoned air conditioning systems.
• Hydronic heating and cooling systems: Combines heating and cooling zones for year-round comfort.

Additional Features:

• Field-replaceable transformer: Facilitates easy maintenance if needed.
• Universal thermostat compatibility: Works with a wide range of thermostats.
• Fuse-protected: Ensures electrical safety.

Things to Consider:

• System compatibility: Verify compatibility with your system’s voltage, control signals, and valve types.
• Installation complexity: While DIY installation is possible, consulting a qualified professional is recommended for optimal performance and safety.
• Expansion modules: If you need more than 4 zones, additional SR504-EXP-1 or SR506-EXP units will be required.