TACO 6 ZONE SWITCH RELAY

🔥 What it is

Taco SR506-5 Switching Relay is a central control board for multi-zone hot water heating systems (boilers).

It replaces a bunch of individual relays with one smart control panel.

⚙️ What it does

It controls up to:

• 6 thermostats (zones)
• 6 circulator pumps or zone valves
• Boiler “call for heat” signal
• Optional priority zone (like domestic hot water tank)

It decides:

“Which zones get heat, when, and for how long”

🧰 Key features

• Controls up to 6 heating zones
• Built-in 24V transformer (power included)
• End switch output to fire boiler
• Priority zone option (Zone 1 can override others)
• LED diagnostic lights per zone
• Pump exercise / post-purge functions
• Expansion capability with other Taco panels

🏠 Where it’s used

• Hydronic boiler systems
• Baseboard heating
• Radiant floor heat
• Multi-zone residential or light commercial systems

🧠 Simple explanation

It’s basically the “traffic controller” for a boiler system:

• Thermostats = request heat
• Zone pumps/valves = move hot water
• SR506-5 = decides which zones get heat and tells the boiler when to turn on