Sufficient working space must be provided per paragraph 110 26 of the nec.
Electric duct heater installation.
Warren heaters are engineered for reliability and safety and are specifically designed not to exceed safe operating temperatures.
Custom built electric duct heaters are safety tested and listed by underwriters laboratories ul and the canadian standards agency csa and meet national electric code nec requirements.
The heater must always be interlocked with the fan.
Rh series electric duct heaters installation operation and maintenance manual.
Installation instructions 47 66kb download document tubular element heaters.
Duct elbows or turns must be located at least 4 from the inlet of the heater and 2 from the outlet of the heater.
Warren technology produces custom built electric duct heaters for installation in commercial hvac systems.
Installation instructions 47 66kb download document thermo air.
Listed below are some important items when installing an electric duct heater.
Instruction manual 66 13kb download document.
A duct heater must be installed according to the installations instructions wiring diagram and labeling supplied with the heater.