L8124C1102 | Honeywell Triple Aquastat Relay 120VAC with Immersion Well

Honeywell · Relays, Contactors & Switches

Description  The Honeywell L8124C1102 is a Triple Aquastat Relay designed for hydronic heating systems requiring combined high limit, low limit, and circulator control functions. Operating at 120 VAC, it regulates boiler water temperature and burner operation through adjustable limit settings. The L8124C1102 includes an immersion well configuration for accurate temperature sensing in boiler applications.   Technical Specifications  Condition New/Never Used Surplus Brand Honeywell Category HVAC Part Number L8124C1102 Subcategory Aquastat Relay Control Type Triple Aquastat Relay Input Voltage 120 VAC Frequency 50/60 Hz High Limit Setting Range 130°F to 240°F (54°C to 116°C) High Limit Differential 10°F fixed Low Limit Setting Range 110°F to 220°F (43°C to 104°C) Low Limit Differential 10°F to 25°F adjustable Pressure Rating (Well) 200 psi Maximum Ambient Temperature (Case) 150°F (66°C) Sensing Element Size 3/8 x 2-7/8 in. (10 x 73 mm) Insertion Length 3-3/8 in. (86 mm) Mounting Thread 1/2 or 3/4 in. NPT Weight 2.00 lbs     Information About L8124C1102 The L8124C1102 is a Honeywell aquastat relay engineered to control burner and circulator operation in oil-fired or hydronic boiler systems. It combines adjustable high and low temperature limits with a fixed high-limit differential and adjustable low-limit differential to maintain system temperature stability. The control uses a 3/8 x 2-7/8 in. sensing element installed in a 1/2 or 3/4 in. NPT immersion well for direct boiler water measurement. Designed for 120 VAC systems, it supports thermostat heat anticipator settings of 0.2A and is rated for pressures up to 200 psi when used with an immersion well. Key Features: Triple Aquastat Functionality: Integrates high limit, low limit, and circulator control in one device. 120 VAC Operation: Designed for standard 120 VAC, 50/60 Hz hydronic systems. Adjustable High Limit: Temperature range 130°F to 240°F with fixed 10°F differential. Adjustable Low Limit: Temperature range 110°F to 220°F with 10°F to 25°F differential. Immersion Well Sensing: 3/8 x 2-7/8 in. sensing element for direct boiler temperature measurement. Pressure Rated Design: 200 psi rating with immersion well installation. Flexible Mounting: 1/2 or 3/4 in. taper pipe thread mounting; vertical or horizontal case orientation. The L8124C1102 delivers the reliability and precision required for hydronic boiler temperature and burner control applications.

Brand: Honeywell · Category: Relays, Contactors & Switches

Key features

• Triple Aquastat Functionality: Integrates high limit, low limit, and circulator control in one device.
• 120 VAC Operation: Designed for standard 120 VAC, 50/60 Hz hydronic systems.
• Adjustable High Limit: Temperature range 130°F to 240°F with fixed 10°F differential.
• Adjustable Low Limit: Temperature range 110°F to 220°F with 10°F to 25°F differential.
• Immersion Well Sensing: 3/8 x 2-7/8 in. sensing element for direct boiler temperature measurement.
• Pressure Rated Design: 200 psi rating with immersion well installation.
• Flexible Mounting: 1/2 or 3/4 in. taper pipe thread mounting; vertical or horizontal case orientation.

Specifications

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