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