Bell & Gossett ZoneTrol II AZ-1A

Snap-on design allows the AZ-1A to be quickly attached to any B&G wet rotor circulator, reducing your inventory investment (no need to carry “special” circulators with factory mounted controllers)
Clearly marked terminals make for sure, fast wiring of the system
Compact design fits in tight locations and present a clean, professional appearance
100% factory tested assures reliable operation
5 year warranty
Daisy-Chain the AZ-1A relays for systems with multiple zones
Can be used on any B&G model, NRF, NBF, or 1/12 to 1/6 HP Series PL pump