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Armstrong EHU-600 - User Manual

Armstrong EHU-600
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HUMIDIFICATION
Installation and Maintenance of
Armstrong EHU-600 Series Humidifiers
The Armstrong EHU-600 Series humidifier is an electronically controlled,
non-pressurized, electric steam-generating humidifier, with its vapor discharged into a
duct of an air-handling system or through a fan package.
To allow the EHU-600 Series humidifier to function to its full capability, be certain to
install in accordance with Armstrong recommendations.
These installation and maintenance guidelines should be used by experienced person-
nel as a guide to ensure that the Armstrong EHU Humidifier functions correctly. Selection
or installation of equipment should always be accompanied by competent technical
assistance. We encourage you to contact your local representative or Armstrong if further
information is required.
READ AND SAVE THESE INSTRUCTIONS
Bulletin No. 526-G

Questions and Answers

  • D
    Dominique WilliamsAug 1, 2025
    Why is my Armstrong EHU-600 contactor cycling and filling continuously?
    • C
      Carl StewartAug 1, 2025
      If the contactor cycles or chatters and the unit fills continuously, it might be due to mis-wiring of the humidistat in your Armstrong Humidifier.
  • M
    moodymakaylaAug 9, 2025
    Why are 5 demand lights flickering on my Armstrong Humidifier?
    • R
      Regina BrownAug 9, 2025
      If you observe 5 demand lights flickering on your Armstrong Humidifier, regardless of whether the sensor or pigtail is connected, the humidistat may be mis-wired.
  • W
    Whitney ClarkAug 16, 2025
    What causes the contactor to chatter and the Armstrong Humidifier not to fill?
    • P
      Patricia RobertsonAug 16, 2025
      If the contactor chatters and the unit doesn't fill, the humidistat might be mis-wired in your Armstrong Humidifier.
  • B
    Brandy CrossAug 25, 2025
    Why is 1 or no demand lights flickering on my Armstrong EHU-600 Humidifier?
    • R
      Ricky GloverAug 25, 2025
      If you notice 1 or no demand lights flickering on your Armstrong Humidifier, whether or not the sensor or pigtail is attached, it could indicate that the humidistat is mis-wired.

Summary

Pre-Installation Guide

Verify Local Codes Compliance

Ensure installation complies with all applicable building, plumbing, and electrical codes.

Humidifier Installation Procedures

Mounting The Humidifier Unit

Secures the humidifier unit to a wall using appropriate fasteners.

Electrical Wiring Connections

Details the process and safety precautions for connecting electrical power to the unit.

Control Humidistat Integration

Information on selecting and wiring the control humidistat for humidity regulation.

Wiring Diagram

Provides the electrical wiring diagram for the EHU-600 series humidifiers.

Start-Up Procedure

Maintenance and Care

Water Quality and Treatment

Discusses the impact of water quality and necessary treatments for humidifiers.

System Diagnostics

Humidistat Troubleshooting Guide

Armstrong EHU-600 Specifications

General IconGeneral
BrandArmstrong
ModelEHU-600
CategoryHumidifier
LanguageEnglish

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