Door Track Heaters (Dwgs 2180-0X).pdf

These are engineering design drawings for a door track heater system for the NIST 3 Cell Hybrid Cooling Tower, prepared by CTS Engineering under Consulting Agreement 02-103. The drawings provide technical specifications and assembly instructions for a heating system designed to prevent ice formation on door tracks at the cooling tower facility.

The system consists of a silicon heater element (120VAC, 225W, 3" W × 15" L), a thermostat (120VAC, 250W), and associated electrical components mounted within an anodized 1/8" aluminum "L" channel housing (3.5" × 1.25" × 15.75"). Key components include a 3-hole weep outlet box with cover, door track mounting hardware, terminal box connections, and basin wall anchoring. The heater cover is fabricated from L-channel material shipped as 31 7/8" pieces that must be cut in half to create mirror-image sections, with terminal slots and side holes per specifications. Assembly instructions specify mounting the unit to the door track with an RTV adhesive applied to the back and front of the channel, with clamping required for four hours. The electrical schematic shows the integration of 120VAC heaters and a 40W thermostat into a new heater circuit connected to an existing terminal box. All drawings are dated between January 22, 2003 and December 19, 2002, with revisions ranging from A to E, and are assigned Job Number 2180 with drawing numbers 2180-01 through 2180-08.