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L404F1102

Brief Description (English)
The Honeywell L404F1102 is a fixed high-limit aquastat control designed to prevent overheating in hydronic (water-based) heating systems. It acts as a safety switch, cutting power to the burner or boiler when water temperature exceeds 110°F (43°C).

Key Features:
Fixed setpoint for fail-safe operation in residential/commercial boilers.

Heavy-duty 16A contacts for direct control of gas valves or relays.

Copper sensing bulb for rapid response to temperature changes.

6 ft capillary tube for flexible installation.

Typical Applications:
Boiler overheat protection

Hydronic heating system safety controls

Pool/spa temperature monitoring

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Honeywell L404F1102 Product Parameters (English)
Key Specifications:
Model: L404F1102

Type: High-Limit Aquastat Control

Function: Temperature-activated safety switch for hydronic heating systems

Temperature Range: 110°F (43°C) fixed setpoint (non-adjustable)

Switch Action: Snap-action, single-pole, single-throw (SPST)

Electrical Rating: 16A @ 120-240V AC

Temperature Sensing: Capillary tube with 6 ft (1.8 m) length

Bulb Material: Copper

Differential: Approx. 10°F (5.5°C)

Mounting: Surface or immersion well installation

Operating Ambient Temperature: -20°F to 160°F (-29°C to 71°C)

Safety Certifications: UL, CSA