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NBK-21189 – Aquastat Hi/Lo Limit Controller
The NBK-21189 Aquastat Hi/Lo Limit Controller is designed to deliver precise temperature control for hydronic heating systems, outdoor wood boilers, and similar applications. It provides accurate high- and low-temperature cut-offs to prevent overheating and maintain safe, efficient operation.
Key Features
- Hi/Lo Temperature Control – Dual setpoints regulate high and low temperature thresholds, ensuring consistent system performance
- Versatile Application – Suitable for outdoor wood boilers, hydronic heaters, and various heating system configurations
- Reliable Safety Shutoff – Automatically halts burner or circulator operation when temperature limits are exceeded
- Adjustable Differential – Allows fine-tuning of cycle characteristics for optimal system efficiency
Specifications
- SKU: 21189
- Category: Outdoor Boiler / Limit Controllers
- Type: Aquastat Hi/Lo Limit Controller
- Operating Range: Suitable for standard hot water heating systems
Equivalent To
- Honeywell: L6006C1018/U
Common Applications
- Outdoor wood boilers
- Hydronic baseboard and radiant heating systems
- Hot water heater tanks requiring dependable limit control
Why Choose This Aquastat
The NBK-21189 delivers dependable high- and low-limit protection to safeguard heating equipment. Its durable design ensures consistent operation and helps extend the life of boilers, circulators, and associated system components.