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:

  • ESP-PLUS for B&G Centrifugal Pumps, Booster Pumps, Pump Accessories, and Air Separator
  • ESP-PARTS for replacement parts selection
  • ESP-TANKS for replacement parts selection
  • CAD Drawings for 2D and 3D dimensional drawings in many formats

Heat Exchanger Product Selection

Steam + Water Pressure Reducing Values

Sizing Tools:

Report Bugs/Request Enhancements
Please email the following address to report issues and request enhancements: ebusiness.support@xyleminc.com

Consult your local Bell & Gossett Representative for additional assistance.

Regional Office:

Byblos Bank Center 1st Floor
Baabda Main Street
Lebanon
Tel.: +961-5-920401

Search below to find your local distributor. If there is no location found, please contact our regional office for more information.

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