Description
Honeywell L8124A1015 Triple Aquastat Relay Overview
The Honeywell L8124A1015 is a professional-grade Triple Aquastat Relay engineered for hydronic heating systems. It combines three essential boiler control functions into a single, compact unit — high limit protection, low limit control, and circulator relay operation — simplifying installation and reducing wiring complexity on residential and light commercial boiler applications.
High Limit Protection
The high limit function safeguards the boiler against overheating by shutting down the burner when water temperature exceeds the setpoint. The high limit features a fixed 10-degree differential, ensuring consistent and reliable cut-in and cut-out performance across the full operating range.
- High Limit Operating Range: 130–240°F
- Fixed High Limit Differential: 10°F
Low Limit & Circulation Control
The integrated low limit function maintains minimum boiler water temperature to ensure the system is always ready to deliver heat on demand. The adjustable low limit differential provides flexibility to match a variety of system designs and heating loads.
- Low Limit Operating Range: 110–220°F
- Adjustable Low Limit Differential: 10–25°F
Circulator Relay
The built-in circulator relay energizes the zone circulator pump in response to a call for heat, eliminating the need for a separate relay and reducing panel complexity. This integrated approach streamlines hydronic system wiring and improves overall system reliability.
Installation Features
- Immersion-style aquastat designed for direct boiler well mounting
- 3-inch insulation rating for compatibility with insulated boiler jackets
- Compact, all-in-one design replaces multiple individual controls
- Suitable for residential and light commercial hydronic heating systems
Key Specifications
- SKU: L8124A1015
- Control Type: Triple Aquastat Relay
- Functions: High Limit, Low Limit, Circulator Control
- High Limit Operating Range: 130–240°F
- Low Limit Operating Range: 110–220°F
- High Limit Differential: 10°F (Fixed)
- Low Limit Differential: 10–25°F (Adjustable)
- Insulation Depth: 3 inches
- Brand: Honeywell
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