Resideo - Honeywell Home L4006A1009 Aquastat Controller

The Aquastat Controller L4006A1009 from Resideo Honeywell Home delivers precise boiler temperature control for reliable heating system performance. This Aquastat Controller uses a copper bulb (3/8 inch diameter x 2-7/8 inch length) with a 1-1/2 inch capillary and direct horizontal/vertical immersion, offering a fixed 5°F differential and a sensing setup that suits boiler and storage-tank applications.

• Sensing and immersion: Copper bulb (3/8" dia x 2-7/8" long) with a 1-1/2" capillary for direct horizontal or vertical immersion.
• Fixed differential: 5°F fixed differential for stable boiler control.
• Temperature range: Sensing range of 100–240°F with a maximum rating of 150°F.
• Electrical and contact: SPST contact with break on temperature rise; 8 A @120 VAC / 5.1 A @240 VAC (full load); 48 A @120 VAC / 30.6 A @240 VAC (locked rotor); 0.25 A @0.25–12 V DC (millivolt).
• Pressure and connections: Capillary 200 psi; immersion well 255 psi; 3/4" conduit and screw-terminal connections.
• Applications and approvals: Ideal for boiler and storage-tank use; UL, CSA, and AGA approvals; includes 1/2" immersion well (123869A).
• Physical specs: Overall dimensions 2" W x 2-1/8" D x 5-5/8" H; sensing fluid: toluene or silicone oil.