Description
The Bell & Gossett 113224 Aquastat (AQS-3/4) is a precision hydronic control designed specifically for use with NBF series circulators. It monitors system water temperature and automatically cycles the circulator on and off to maintain efficient hydronic system operation — protecting equipment and ensuring consistent comfort.
How It Works
This aquastat senses pipe temperature and controls circulator operation based on preset setpoints. When water temperature drops to 100°F, the aquastat energizes the circulator (On). When temperature rises to 120°F, it de-energizes the circulator (Off). This differential control prevents short-cycling and keeps hydronic systems running at peak efficiency.
Key Specifications
- Manufacturer Part Number: 113224
- Model: AQS-3/4
- Application: NBF Series Circulators
- Off Setpoint: 120°F
- On Setpoint: 100°F
- Compatible Pipe: 3/4″ copper pipe or 1/2″ steel pipe
Features & Benefits
- Designed specifically for Bell & Gossett NBF circulator series
- Dual pipe compatibility — fits 3/4″ copper or 1/2″ steel pipe installations
- Factory-set On/Off temperature differential for reliable, consistent control
- Protects circulator from operating in low-temperature or no-flow conditions
- Compact design for easy installation in tight mechanical spaces
- Genuine Bell & Gossett OEM replacement part
Typical Applications
- Residential and light commercial hydronic heating systems
- Hot water baseboard heating circuits
- Boiler circulator control in NBF-series installations
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