Medium Temperature Air Duct Heater

U-Shaped Tubular Elements with INCOLOY® sheath are mounted in a heavy gauge steel flange with 9/32" diameter mounting holes for attaching to duct work. All terminal connections are of high-temperature alloy construction and are enclosed in an aluminum painted steel housing.

Steel flange is equipped with special holes to permit easy replacement of individual element. Sheet steel terminal box may be removed to facilitate wiring during installation.

All Heaters can be mounted in any position; top, side or bottom entry. In high ambient temperature operations, least corrosive action and least oxidation to the terminals will occur if heaters are mounted with terminals in the coolest possible ambient, usually on bottom or side of duct. Minimum duct size is A dimension plus 3/8" or 11-1/8" plus 3/8" and B dimension plus 1-5/8".

Wiring — Terminals on field wiring connections are located in circular junction box outside of heating zone. Alloy wire or buss bar must be used for power connections.

Maximum Sheath Temperature — 1150°F.

• Process Air Heater Design Guide
• TDH Installation Manual
• TDH Catalog Page
• Air Duct Heaters Specification Data Sheet