1660-18912 Thermostat

The 1660-18912 thermostat is a watertight, dust tight and corrosion resistant temperature control in a lightweight die cast enclosure with a calibrated dial and an external knob adjustment for outdoor or indoor locations. The thermostat is approved for use in Class I, Groups B, C and D; Class II, Groups E, F, and G; and Class III hazardous locations. The liquid-filled thermal system, with its stainless steel sensor stem, provides a very dependable and accurate control system.

Enclosure: Die cast aluminum w/ gray aluminum lacquer. NEMA 4X, 7, 9; weatherproof, explosion proof. Class I: Groups B, C, D; Class II Groups E, F, G, Class III. Connection: Screw terminals on terminal block through 3/4-NPT hub Switch: SPDT UL listed with external knob/dial adjustment and tamperproof cover Rating: 22 amps at 480 VAC. Range: 15° - 140°F. Sensor: 304 SS sensor stem. Approval: UL listed. Accuracy: ±1% of adjustment range.   Download PDF Spec Sheet

Wiring

For heater control, low alarm
(close on falling temperature)
use COM and NC. For high
alarm (close on rising
temperature) use COM and NO..