Description
The Weil McLain 510-312-209 is a high limit temperature control designed for reliable overheat protection in hydronic boiler systems. Featuring a single-pole, single-throw (SPST) switching configuration with automatic recycle operation, this control continuously monitors boiler water temperature and resets automatically once safe operating conditions are restored — minimizing downtime and manual intervention.
Key Features
- SPST automatic recycle operation for hands-free reset after high-limit event
- Wide temperature sensing range of 140°F to 240°F to suit a variety of hydronic applications
- 10°F fixed subtractive differential for precise and consistent switching performance
- Includes 3/4″ NPT immersion well for secure, leak-free installation into boiler piping or vessels
- Designed as a genuine Weil McLain replacement part for compatible boiler systems
Specifications
- SKU: 510-312-209
- Brand: Weil McLain
- Switch Type: SPST (Single-Pole, Single-Throw)
- Operation: Automatic Recycle
- Temperature Range: 140°F – 240°F
- Differential: 10°F Fixed Subtractive
- Well Connection: 3/4″ NPT
Application
This high limit control is ideal for use in hot water boiler systems where precise over-temperature protection is critical. The automatic recycle function makes it well-suited for applications requiring minimal manual oversight. The included 3/4″ NPT well simplifies installation into standard boiler piping configurations, ensuring accurate immersion sensing and a secure fit.
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