Bulletin 544-I
Installation and Operation
Humidifiers for Air Handling Systems
AM-90M, -91M, -92M, -1200M, -93M, -1300M, -94M, -1400M;
HEM-90M, -91M, -92M, -1200M, -93M, -1300M, -94M, -1400M;
DSA-90, -91, -92, -93
Preliminary Procedures..............................................2
Do’s and Don’ts of Humidifier Installation ..................3
Methods of Installing Humidifier.................................4
Installing and Piping the Humidifier ...........................8
Multiple Manifolds ......................................................9
Pneumatic Piping for Air Operated Models .............10
Wiring for Electrically Operated Models...................11
Operation and Servicing ..........................................13
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Table of Contents
Steam humidifiers (or other products) should be installed in locations that allow routine inspection and accessibility
for maintenance operations. Armstrong recommends that steam humidifiers not be placed in locations where
unusual instances of malfunction of the humidifiers or the systems might cause damage to non-repairable,
irreplaceable, or priceless property.
