The Bell & Gossett ZoneTrol II AZ-1A snap-on relay box is an easy to install single zone pump controller that mounts directly on any Bell & Gossett wet rotor circulator or Series PL booster. The Add-A-Zone turns the pump and boiler ON when the thermostat calls for heat.
Using the wire nuts provided with the package, the AZ-1A is quickly assembled onto any NRF/NBF or 1/12 to 1/6 HP Series PL. The clearly marked terminals for the thermostat and the isolated end switch terminals make the rest of the hook-up a snap. The AZ-1A can be daisy-chained together to control multiple zones. The Bell & Gossett AZ-1A is ideal when adding a zone to an existing system.
Features and Benefits
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
General Selection Tools:
Heat Exchanger Product Selection
Steam + Water Pressure Reducing Values
Report Bugs/Request Enhancements
Please email the following address to report issues and request enhancements: email@example.com
Consult your local Bell & Gossett Representative for additional assistance.
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