Make-Up Air Heaters Installation & Wiring

Residential Products
Commercial Products
Electric Utility
Dealer Support
OEM Manufacturing

Electrical Source Power

  • See nameplate for voltage rating, amp draw, and maximum watts
  • 120V single-phase, 240V single-phase, or 208V three-phase - depending upon model and size
  • 120V model has 8’ plug-in cord
  • All other models, terminal block connections (copper wire only)
  • Units above 10 kW include internal fusing

24-Volt Control

  • External 24-volt source is required for operation
  • Turn-on (on/off function) accomplished with the presence of 24-volt source
  • System or external contact closure provides 24 volts to this unit
    • Pressure differential switch
    • Inlet damper end switch
    • Relay connected to blower motor, contact closure
    • Exhaust motor current switch contact
    • Thermostat, blower function “G” (parallel connection)
    • Temperature sensing thermostat (must also operate blower

Round Enclosure, Non-Blower Details

Insert Element Rack Details


Electro Industries, Inc., 2150 West River Street, PO Box 538, Monticello, MN 55362 (Map)
Phone: 800.922.4138 or 763.295.4138  Fax: 763.295.4434

Copyright 2016 Electro Industries, Inc. unless otherwise noted. All rights reserved.