TACO Six Zone Switching Relay W/ Priority - SR506

TACO  Six Zone Switching Relay W/ Priority - SR506

The TACO SR506 is a six zone switching relay built for industrial and commercial needs. It provides reliable control over various devices through six independent zones, able to handle substantial electrical loads. This centralized control unit is ideal for operations in HVAC systems, industrial automation, and lighting control.

The priority control feature ensures critical devices receive uninterrupted power, even when the system is under stress. It operates efficiently in temperatures ranging from negative forty degrees Celsius to seventy degrees Celsius.

Features

• Six independent switching zones
• Priority control for essential processes
• Wide voltage range from twenty-four to two hundred forty VAC or twenty-four to one hundred twenty-five VDC

Specifications

What Our Experts Think

• Priority Zone Control: Zone 6 can be set as the priority, ensuring it receives heat first. If Zone 6 is active for over an hour, the system ensures it remains prioritized, making it ideal for systems with high-demand areas.

• Universal Compatibility: Compatible with conventional and programmable thermostats, offering flexibility for various setups and user preferences.

• Diagnostic Indicators: Equipped with LED indicators to simplify troubleshooting, making it easier to monitor system status and quickly identify any issues.

• Compact and User-Friendly Design: The compact design and clear layout of the control board make installation and maintenance straightforward.

• Reliability and Durability: Built with sealed relays and fuse protection for long-term durability, backed by comprehensive factory testing for reliable performance.

Q&A

Q: What is the Taco SR506 used for?
A: The Taco SR506 is a six-zone switching relay with priority, designed for hydronic heating systems to control multiple zones efficiently.

Q: How does the priority function work?
A: The priority zone ensures that one zone can override others for immediate heating needs, ensuring comfort and energy efficiency.

Q: Can it control other zone valves?
A: Yes, it can manage up to six zones, controlling zone valves or circulators for precise temperature control.

Q: Is the SR506 easy to install?
A: Yes, the SR506 is designed for straightforward installation, with clear wiring instructions and a user-friendly interface.

Q: Why choose the Taco SR506?
A: Taco is a trusted brand, known for reliability and high-quality components that improve system performance and energy savings.

Maintenance Tips

• Power Supply Verification

• Ensure the relay receives 120V AC at terminals H and N. The green LED should indicate that the power is on.

• Fuse Inspection

• Check the 6 amp fuses on the relay board. Replace any blown fuses to ensure proper operation of the relay.

• Relay Functionality

• Test each zone by calling for heat. The corresponding red LED should light up, and the circulator should activate. If a zone fails to respond, inspect the relay for issues.

• Priority Zone Settings

• Configure the priority zone using the DIP switch. This will ensure that all other zones are disabled until the priority zone is satisfied.

• Post-Purge Function

• If using the post-purge feature, ensure it is activated via the DIP switch. This will keep the priority zone energized for 2 minutes after the heat demand is satisfied, helping the system cool down.

• Pump Exercise Mode

• Activate the pump exercise mode, which cycles all circulators every 2 weeks for 30 seconds. This prevents pump seizure during long periods of inactivity.

• Low Limit Control

• Use the low limit feature to ensure the circulators do not operate if the boiler temperature drops below a preset threshold, protecting the system from potential damage.

• System Wiring Check

• Regularly check all wiring connections, especially the end switch (X and X) and ZC/ZR terminals, to ensure proper communication between the relay and the boiler.

• Regular Monitoring

• Observe the system periodically to identify any issues, such as zones not activating or irregular cycling, and address them promptly to maintain optimal performance.