Tempco Custom Heater Manufacturing

Customer required a new skid duct heater system

June 6, 2019


Requirements were:

  1. Blower motor: McMaster-Carr number 1963K13
  2. Control panel: Tempco PMC10007 was initially quoted.  Eventually, PCE20099 was used for this application
  3. Heater requirements were 4KW @ 240 volts. Air pressure switch was required as well (Cleveland DFS-221-112).
  4. Footprint of entire system eventually became 26” long x 22” wide x 48” tall.
  5. Heater and blower differentiating voltages required a step down transformer

First challenge was to design the duct heater and blower combination to fit the 26 x 22 floor footprint, while making the duct heater field service replaceable.  There was also the added pressure switch at the end of the duct heater.  A flange heater “cartridge” was used inside a main duct housing assembly to address the serviceability issue.

Next challenge was to fit the control panel (approx. 24 x 24 x 10) and transformer (approx. 10.5 x 9 x 17, #100 weight) into the volume footprint.  Significant rearrangement had to be done in order to maintain serviceability of the heater “cartridge” assembly.  The arrangement also led to significant wiring routing difficulties.  Conduit ports we specifically located in order to allow the control panel and transformer to be placed ideally.

With the skid being as small as it was (26 x 22) and the majority of it being consumed by the blower and the duct heater, we could not easily use a forklift to transport/locate the system in place, as we would normally design it for.  Instead, we decided on using the reinforced framework that holds the control panel and transformer in place to use as a lifting point for the system.  Eyelets capable of holding the weight of the system were placed in the uprights of the framework in order to use a lift to transfer/locate the system.

Greg Santos

Product Engineer

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Wood Dale, IL 60191-1452 USA
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