ZoneTrol II AZ-1A
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
SELECTION & SIZING TOOLS
Bell & Gossett offers several useful engineering tools for easy sizing of every area of a building. Simple to navigate software gives you accurate information and up-to-date documentation downloadable straight into your submittal package.
Some tools require a registered account: New User Registration | Existing User Password Help
| Selection Tools: | |
| ESP-DESIGN PLUS |  Bell & Gosset: Multi-Stage, Pressure Booster Packages, Wastewater, Vertical Turbines |
| ESP-PLUS | Bell & Gossett Pump Selection: Circulators, End Suction, Closed-Coupled, Inline, Double Suction |
| ESP-THERMAL | Bell & Gossett Gasket Plate & Frame and, Brazed Plate Heat Exchangers |
| ESP-PARTS | Parts Selection |
| Steam-2000 | Steam 200 Selection |
| Steam-1140 | Series 1140 Steam Service Regulators |
| Water-1140 | Series 1140 Water Service Regulators |
| Steam-Traps | Steam Traps Selection |
| CAD Drawings | CAD Drawings |
| Sizing Tools: | |
| System Syzer | System Sizing |
| System Syzer Psychrometry | System Sizing related to coil cooling |
| Steam-Pipe | Steam Pipe Sizing |
| Steam-Loss | Steam Loss Through Failed Trap |
| Flash-Steam | Flash Steam Sizing |
| Condensate-Pipe | Condensate Pipe Sizing |
Stand-Alone Software
For a Windows Applications (stand-alone) version of ESP-PLUS, please contact your local B&G Representative.
ESP Software Support:
For ESP Software Support, please contact ebusiness.support@xyleminc.com
Bell & Gossett
Bell & Gossett is a leading manufacturer of pumps, valves, heat exchangers, and accessories for plumbing, wastewater, and HVAC—including steam and heat transfer—applications.
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