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  • Install the heaters in a horizontal duct with the terminal housing at the side or bottom.
  • Use tandem mounting (several heaters in series) when possible.
  • Secondary linear cutout - Manual reset complete with back-up magnetic contactor on units under 300 V, 30 kW and less
Unit of Measure

Specifications

Brands

 N/A WATTCO™

Power

 N/A 35 kW

Phase

 N/A 1 3

Standard Voltage at Single Phase

 N/A 480 V

Standard Voltage at Three Phase

 N/A 240 V600 V

Minimum Air Flow

 N/A 1650 ft³/min46.7 m³/min

Number of Finned Elements

 N/A 9

Approximate Weight

 N/A 60 lb27 kg

Frame Construction Type

 N/A Flanged Duct

Tubular Elements

 N/A Finned

Heater Type

 N/A QFD

Primary Linear Cutout Temperature

 N/A 160 ºC71 ºF

Primary Linear Cutout Alternating Current (AC) Voltage

 N/A 277 V600 V

Primary Linear Cutout Current

 N/A 10 A25 A

Primer Linear Cutout Type

 N/A Non-Inductive

Secondary Linear Cutout Temperature

 N/A 107 ºC225 ºF

Secondary Linear Cutout Alternating Current (AC) Voltage

 N/A 277 V600 V

Secondary Linear Cutout Current

 N/A 10 A25 A

Secondary Linear Cutout Type

 N/A Non-Inductive

Heater Dimensions

Dimension A

 N/A 24 in610 mm

Dimension B

 N/A 22.0 in559 mm

Dimension C

 N/A 6 1/2 in163 mm

Dimension D

 N/A 7 in178 mm

Dimension E

 N/A 2 in51 mm

Alternative Auxiliary Duct Heater Controls

Alternative Auxiliary Duct Heater Controls

 N/A The following controls are supplied by WATTCO™ on the duct heater or are available as an EEMAC rated control panel for wall mount:
  • Duct thermostats
    • QFD (1 stage)
  • QFD (2 stage)
  • QFD (0 -135 OHM)
  • Controller
  • Room thermostat
  • Bulb holders
  • Silent contactors
  • SCR controllers
  • Sail switch
  • Fixed pressure differential switch
  • Main disconnect
  • Pneumatic electric switches
  • On-off switch
  • Magnetic contactors
  • Step controllers
  • Load fuses
  • Stage fuses
  • HRC fusing
  • Control transformers
  • Bottom terminal box
  • Secondary manual reset thermal cut-out
  • Fan interlock relay
  • Protective screens
  • Pilot lights

Application

Application

 N/A Comfort Heating

Note

Note

 N/A Units are only examples. For safety reasons, refer to this as a guideline for custom design orders. Custom designed units will be built according to the requirements of your specific application.

QFE and QIE Incoloy® tubular duct heaters are only available upon request.