Resideo by Honeywell L8148E1299 Aquastat Relay High Limit 180-240°F with 50VA Transformer

The Resideo by Honeywell L8148E1299 is an immersion-type aquastat relay designed for hydronic heating systems that combines high limit protection with switching relay control of burner and circulator motors. This vertical mount controller operates within a 180 to 240 degree Fahrenheit temperature range with a 15 degree fixed differential, making it ideal for low voltage and millivolt heating applications.

Key Features:

• Integrated 50VA transformer for reliable power supply
• High limit opens burner circuit only for safety protection
• Includes accessory terminals for adding remote low limit controller
• Compatible with SV Smart Valves and Molex damper plug systems
• Vertical or horizontal mounting options available
• Maximum safe operating pressure: 255 PSI (1757 kPa) on immersion well
• Requires 24 VAC thermostat with heat anticipator set at 0.2A
• Includes heat conductive compound and well adapter for proper installation

This aquastat relay provides essential temperature control and safety features for residential and commercial hydronic heating systems, including hot water boilers and radiant heating applications. The immersion-type sensor ensures accurate temperature monitoring for optimal system performance and protection.