Resideo - Honeywell Home L4006A1017 Aquastat Controller

The Aquastat Controller from Resideo Honeywell Home delivers precise boiler control for residential and commercial systems. The L4006A1017 model features a copper sensing bulb (3/8 in diameter x 2-7/8 in length) with a 1-1/2 in capillary and direct immersion in a well for accurate high/low limit operation, offering a temperature range of 100–240°F and an adjustable differential of 5–30°F. The unit carries a maximum temperature rating of 150°F.

UL, CSA, and AGA approvals ensure safe compatibility with boiler and storage tank setups. It uses a 3/4 inch conduit connection and screw-terminal wiring for easy installation, with SPST contact configuration and break-on-temperature-rise operation.

Key electrical and sensing details support versatile heating applications, including:

• SPST contacts that break on temperature rise for reliable safety shutoff
• Load ratings up to 8 A at 120 VAC / 5.1 A at 240 VAC (full load); 48 A at 120 VAC / 30.6 A at 240 VAC (locked rotor); 0.25 A at 0.25–12 V DC (millivolt)
• Pressure ratings of 200 psi (capillary bulb) and 255 psi (immersion well)
• Sensing bulb filled with toluene or silicone oil for stable sensing
• Includes 123869A 1/2 inch well for flexible installation