Electric air heater CHMS

wall-mounted

General 1. Provide Series CHMS enclosed element electric duct heaters as manufactured and listed on schedule. 2. Power, voltage phase, control voltage, wattage, duct size, number of steps to be per schedule. 3. Heaters to be either slip-in or flanged type as called for on schedule. 4. All heaters to be ETL listed for zero clearance to combustible surfaces and bear ETL label. 5. All heaters shall meet the requirements of the National Electric Code. 6. Standard terminal box, recessed terminal box, standard control cabinet, remote control cabinet and element housing to be made of 18 gauge aluminized steel. Element Construction 1. All elements to be made of high quality alloy resistor wire, centered and permanently encased within highly compacted, rock-hard refractory material, surrounded by stainless steel sheath. All element terminations shall be threaded stainless steel type to insure a positive connection to leads. Terminal Box or Control Cabinet 1. Shall be constructed of 18 gauge Aluminized steel. All boxes to have a solid cover of the same gauge, complete with a piano type hinge on the longest dimension, tool operated latch and pull ring.