Resideo - Honeywell Home L4006A1967 Aquastat Controller

The Aquastat Controller by Resideo—Honeywell Home L4006A1967 delivers precise boiler and storage-tank temperature control with dependable high/low limit protection. Designed for direct horizontal or vertical immersion, it uses a copper sensing bulb and an optional capillary for flexible sensing. With an adjustable differential of 5–30°F and a range of 100–240°F, it ensures reliable temperature control for your system while staying within safe operating parameters. This UL, CSA, and AGA approved unit features SPST contact with a break-on-temperature-rise action for robust boiler control.

• Application: Boiler and storage tank temperature control with high/low limit protection
• Primary sensing: 3/8 inch diameter x 2-7/8 inch copper bulb; 1-1/2 inch capillary length
• Temperature range: 100–240°F with a maximum rating of 150°F
• Differential: Adjustable 5–30°F
• Electrical: SPST contact, break on temperature rise; 3/4 inch conduit and screw terminals
• Ratings: 8 A at 120V AC / 5.1 A at 240V AC (full load); 48 A at 120V AC / 30.6 A at 240V AC (locked rotor); 0.25 A at 0.25–12 V DC (millivolt)
• Dimensions: 2" W x 2-1/8" D x 5-5/8" H
• Sensing liquid: Toluene or silicone oil
• Pressure rating: 200 psi (capillary bulb), 255 psi (immersion well)
• Includes: Factory stop set at 240°F; 1/2 inch well (123869A)
• Approvals: UL, CSA, AGA