L8148E1257 | Honeywell High Limit Aquastat Relay 140–240°F with Vent Damper Connection
L8148E1257 | Honeywell High Limit Aquastat Relay 140–240°F with Vent Damper Connection
L8148E1257 | Honeywell High Limit Aquastat Relay 140–240°F with Vent Damper Connection
    L8148E1257 | Honeywell High Limit Aquastat Relay 140–240°F with Vent Damper Connection
L8148E1257 | Honeywell High Limit Aquastat Relay 140–240°F with Vent Damper Connection

L8148E1257 | Honeywell High Limit Aquastat Relay 140–240°F with Vent Damper Connection

Part #: L8148E1257 Manufactured by: Honeywell
Regular price
$559.00
Sale price
$559.00
Regular price
1 in Stock
Condition: New-Surplus Original Box
Shipping calculated at checkout.
Product Overview
The Honeywell L8148E1257 High Limit Aquastat Relay combines temperature control and burner management in a durable vertica...  Read more
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IQElectro 2-Year Warranty
Warranty for Product #: L8148E1257
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Original Manufacturer's Warranty Not Covered, This Product is SURPLUS.

Product Description P/N: L8148E1257

Description / Specifications

Description 

The Honeywell L8148E1257 High Limit Aquastat Relay provides precise high-limit temperature control for hydronic heating systems. Designed for vertical mounting, it features a 140–240°F temperature range and includes a vent damper connection, ensuring efficient burner operation and reliable system safety.


 

Technical Specifications 

Condition New/Never Used Surplus
Brand Honeywell
Category HVAC Controls
Part Number L8148E1257
Subcategory Aquastat Relay
Type High Limit Aquastat Relay
Temperature Range 140°F to 240°F
Control Function High Limit (Burner Circuit Only)
Mounting Type Vertical Case
Power Supply 120 VAC
Thermostat Requirement 24 VAC Thermostat (0.2A Anticipator Setting)
Transformer Included Yes (Integral Transformer for 24V Control Circuit)
Accessory Terminals For Remote Low Limit Controller
Vent Damper Connection Yes
Switch Type SPST Relay
Control Circuit Voltage 24 VAC
Application Hydronic Heating Systems (Oil or Gas Boilers)
Case Material Metal Enclosure
Electrical Rating Designed for Line and Low Voltage Circuits
Operation Mode Opens Burner Circuit at High Limit
Safety Feature Automatic Reset on Temperature Drop
Mounting Orientation Vertical Only
Dimensions (Approx.) Standard Honeywell Aquastat Relay Form Factor
Weight 4.00 lbs

 


Information About L8148E1257

The L8148E1257 belongs to Honeywell’s trusted line of Aquastat relays designed to regulate boiler temperature and burner control in hydronic heating systems. It serves as a high-limit controller, opening the burner circuit when water temperature exceeds the set limit. This model operates within a 140°F–240°F range and includes integrated terminals for connecting a vent damper and optional remote low-limit controller. The vertical-mount metal case design provides durability and efficient heat dissipation, while its integral transformer powers the 24 VAC control circuit. Engineered for reliability, it ensures precise system control, reduced cycling, and protection from overheating.

Key Features:

  • High Limit Temperature Control: Monitors and interrupts burner operation when water temperature exceeds set parameters.
  • Wide Adjustable Range: Operates from 140°F to 240°F for flexibility in hydronic heating systems.
  • Integrated Transformer: Supplies 24 VAC power to thermostat and control circuitry.
  • Vent Damper Connection: Supports automatic vent damper systems for improved energy efficiency and safety.
  • Vertical Mount Configuration: Designed for easy installation and optimal thermal response.
  • Accessory Terminals: Allows connection of optional remote low limit controller for enhanced system functionality.
  • Durable Metal Enclosure: Provides long-term protection and stable operation under high temperature conditions.
  • Reliable Safety Function: High limit relay opens the burner circuit only, preventing overheating while maintaining system stability.

The L8148E1257 delivers the reliability and precision required for safe, efficient operation of hydronic boiler systems and temperature-based burner control.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Honeywell L8148E1257 High Limit Aquastat Relay provides precise high-limit temperature control for hydronic heating systems. Designed for vertical mounting, it features a 140–240°F temperature range and includes a vent damper connection, ensuring efficient burner operation and reliable system safety.


 

Technical Specifications 

Condition New/Never Used Surplus
Brand Honeywell
Category HVAC Controls
Part Number L8148E1257
Subcategory Aquastat Relay
Type High Limit Aquastat Relay
Temperature Range 140°F to 240°F
Control Function High Limit (Burner Circuit Only)
Mounting Type Vertical Case
Power Supply 120 VAC
Thermostat Requirement 24 VAC Thermostat (0.2A Anticipator Setting)
Transformer Included Yes (Integral Transformer for 24V Control Circuit)
Accessory Terminals For Remote Low Limit Controller
Vent Damper Connection Yes
Switch Type SPST Relay
Control Circuit Voltage 24 VAC
Application Hydronic Heating Systems (Oil or Gas Boilers)
Case Material Metal Enclosure
Electrical Rating Designed for Line and Low Voltage Circuits
Operation Mode Opens Burner Circuit at High Limit
Safety Feature Automatic Reset on Temperature Drop
Mounting Orientation Vertical Only
Dimensions (Approx.) Standard Honeywell Aquastat Relay Form Factor
Weight 4.00 lbs

 


Information About L8148E1257

The L8148E1257 belongs to Honeywell’s trusted line of Aquastat relays designed to regulate boiler temperature and burner control in hydronic heating systems. It serves as a high-limit controller, opening the burner circuit when water temperature exceeds the set limit. This model operates within a 140°F–240°F range and includes integrated terminals for connecting a vent damper and optional remote low-limit controller. The vertical-mount metal case design provides durability and efficient heat dissipation, while its integral transformer powers the 24 VAC control circuit. Engineered for reliability, it ensures precise system control, reduced cycling, and protection from overheating.

Key Features:

  • High Limit Temperature Control: Monitors and interrupts burner operation when water temperature exceeds set parameters.
  • Wide Adjustable Range: Operates from 140°F to 240°F for flexibility in hydronic heating systems.
  • Integrated Transformer: Supplies 24 VAC power to thermostat and control circuitry.
  • Vent Damper Connection: Supports automatic vent damper systems for improved energy efficiency and safety.
  • Vertical Mount Configuration: Designed for easy installation and optimal thermal response.
  • Accessory Terminals: Allows connection of optional remote low limit controller for enhanced system functionality.
  • Durable Metal Enclosure: Provides long-term protection and stable operation under high temperature conditions.
  • Reliable Safety Function: High limit relay opens the burner circuit only, preventing overheating while maintaining system stability.

The L8148E1257 delivers the reliability and precision required for safe, efficient operation of hydronic boiler systems and temperature-based burner control.

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