L8148E1265 | Honeywell High Limit Vertical Mount Aquastat Relay, 180–240°F, 15°F Differential

Honeywell · Relays, Contactors & Switches

Description  The Honeywell L8148E1265 Aquastat Relay is a vertical-mount, immersion-type controller that combines high limit protection with relay switching for burner and circulator control. It operates within a 180°F to 240°F temperature range with a fixed 15°F differential, ensuring dependable boiler management. This model is designed for precise high limit operation in hydronic heating systems.     Technical Specifications  Condition New/Never Used Surplus Brand Honeywell Category Controls & Indicators Part Number L8148E1265 Subcategory Temperature/Process Control Application High Limit control for boilers Switch Action SPST Temperature Range 180°F to 240°F Max Temp Differential 15°F (fixed) Frequency 60 Hz Electrical Rating Burner: 7.4A @120V, 3.7A @240V; Circulator: 7.4A @120V, 3.7A @240V ALR Ratings Burner: 44.4A @120V, 22.2A @240V; Circulator: 44.4A @120V, 22.2A @240V Voltage 120 Vac Thermostat Requirement 24 Vac with heat anticipator set at 0.2A Connection Type Quick-Connect Capillary Length 4-1/2" Mount Vertical Case Options Vertical or horizontal available Max Pressure 255 PSI (Immersion Well) Operating Humidity 0%–95% non-condensing Max Ambient Temp 77°F (1.4A 24V load), 150°F (1.2A 24V load) Dimensions (H x W x D) 6-1/8" x 4-3/8" x 3-1/8" Weight 2.50 lbs     Information About L8148E1265 The L8148E1265 is part of Honeywell’s Aquastat Relay series, built for immersion control in hot water boiler applications. It features an SPST high limit switch combined with relay control, allowing simultaneous regulation of burners and circulator motors. The unit is designed for vertical mounting and includes accessory terminals to support a remote low-limit controller when required. Its robust construction, 4-1/2" capillary, and compatibility with 24 Vac thermostats make it reliable for residential and light commercial heating systems. Key Features: High Limit Protection: Opens the burner circuit to prevent overheating. SPST Switching: Controls burner and circulator operation in hydronic systems. Fixed Differential: Maintains a 15°F separation for stable temperature regulation. Wide Temperature Range: Adjustable from 180°F to 240°F for boiler applications. Accessory Terminals: Supports connection to an external low limit controller. Vertical Mount Design: Built for reliable vertical installation in immersion wells. Quick-Connect Terminals: Simplifies wiring and system integration. Durable Build: Handles up to 255 PSI pressure and high humidity environments. The L8148E1265 delivers the reliability and precision required for boiler temperature management in hydronic heating systems.

Brand: Honeywell · Category: Relays, Contactors & Switches

Key features

• High Limit Protection: Opens the burner circuit to prevent overheating.
• SPST Switching: Controls burner and circulator operation in hydronic systems.
• Fixed Differential: Maintains a 15°F separation for stable temperature regulation.
• Wide Temperature Range: Adjustable from 180°F to 240°F for boiler applications.
• Accessory Terminals: Supports connection to an external low limit controller.
• Vertical Mount Design: Built for reliable vertical installation in immersion wells.
• Quick-Connect Terminals: Simplifies wiring and system integration.
• Durable Build: Handles up to 255 PSI pressure and high humidity environments.

Specifications

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