• Galvanized Steel Element Rack - Always 1” shorter than duct height and 1/2” shorter than duct width to allow insertion clearance • Galvanized Steel Compartment with 1/2” fiberglass Insulation & Hinged Cover • Door Interlock Disconnect Switch • Primary Automatic Reset Temp Limiting Control • Load Carrying Secondary over Temperature Protective Device(s) • Definite Purpose Magnetic Contactor(s) • Differential Pressure Fan Inter-lock Switch • Step Down Control Transformer / 24 Volt• Permanently Attached Wiring Diagram on inside of Terminal Compartment Cover