Resideo - Honeywell Home L4008A1015 Remote Bulb Aquastat Controller

The Remote Bulb Aquastat Controller from Resideo - Honeywell Home L4008A1015 provides precise boiler and storage-tank temperature control for reliable heating. Designed for flexible installation with horizontal or vertical immersion, this high/low limit thermostat offers robust SPST control and dependable performance in demanding environments.

The copper bulb (3/8 in diameter x 2-7/8 in length) pairs with a 66-inch capillary to monitor temperatures accurately. It supports a wide application range from 100 to 240°F, with a maximum rating of 150°F, and features adjustable differential from 5 to 30°F. The device is built for durable service, including a 3/4 inch conduit connection and screw terminal for easy wiring.

• Contact Configuration: SPST, Break on Temperature Rise
• Electrical ratings: 8 A at 120 V AC / 5.1 A at 240 V AC (full load); 48 A at 120 V AC / 30.6 A at 240 V AC (locked rotor); 0.25 A at 0.25–12 V DC (millivolt)
• Connections: 3/4 inch conduit and screw terminal
• Applications: Boiler, Storage Tank
• Sensing details: Copper bulb with capillary; fill liquids: toluene or silicone oil
• Approvals: UL, CSA
• Physical specs: 2 in W x 2-1/8 in D x 5-5/8 in H; Differential 5–30°F adjustable
• Pressure ratings: 200 PSI (Capillary Bulb), 255 PSI (Immersion Well)