Resideo - Honeywell Home L4006A1678 Aquastat Controller

Aquastat Controller for boilers and storage tanks—the Resideo Honeywell Home L4006A1678 delivers precise, reliable temperature control. This rugged control combines a copper sensing bulb, a long capillary, and a versatile immersion well, designed for direct horizontal or vertical mounting and dependable high/low limit operation.

• Sensing assembly: 3/8" diameter x 2-7/8" copper bulb with a 3" capillary.
• Immersion: Direct horizontal/vertical well immersion for flexible installation.
• Temperature range & limit: 100–240°F operating range; maximum temperature rating 150°F.
• Electrical ratings: SPST contact; 8A at 120V AC / 5.1A at 240V AC (full load); 48A at 120V AC / 30.6A at 240V AC (locked rotor); 0.25A at 0.25–12V DC (millivolt).
• Configuration & connections: Break on temperature rise; 3/4" conduit; screw terminal.
• Applications: Suitable for boilers and storage tanks.
• Approvals: UL, CSA, AGA.
• Dimensions: 2" W × 2-1/8" D × 5-5/8" H.
• Differential & pressure: Adjustable 5–30°F; capillary bulb 200 PSI, immersion well 255 PSI.
• Sensing liquid: Toluene or Silicone Oil.
• Extras: Factory stop at 240°F and heat-conductive compound included.