Page 20 • DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual
Dispersion: General instructions
Selecting the dispersion assembly location
• For each dispersion device, DRI-STEEM documents distances
required for absorption to occur. If you have questions about
absorption distances, see the absorption tables in the XT Series
catalog, available for viewing, printing or ordering at
www.dristeem.com
• It is important that the dispersion assembly be positioned where
the water vapor being discharged is carried off with the airstream
and is absorbed before it can cause condensation or dripping in
the duct.
• In general, the dispersion assembly is best placed where the
air can most readily absorb the moisture being added without
causing condensation at or after the unit. This normally will be
after the heating coil or where the air temperature is highest.
• Place the dispersion assembly such that absorption will occur
before the intake of a high efficiency filter. The filter can remove
the visible moisture and become waterlogged.
• Place the dispersion assembly such that absorption will occur
before coming in contact with any metal surface.
• Place the dispersion assembly such that absorption will occur
before fire or smoke detection devices.
• Place the dispersion assembly such that absorption will occur
before a split in the duct. Otherwise, the dispersion assembly may
direct more moisture into one duct than the other.
• When draining dispersion condensate to an open drain, provide
a 1" (25 mm) gap between the condensate drain piping and the
drain. Locate air gap only in spaces with adequate temperature
and air movement to absorb flash steam, or condensing on nearby
surfaces may occur.
Where to find more dispersion
information
In this document:
• Interconnecting piping and drip tee
installation, pages 21-24
• Single Tube and Multiple Tube installation
instructions, pages 25-28
• Rapid-sorb
®
installation instructions,
pages 29-35
• XT Steam Blowers, pages 36-43
On our web site:
The following documents can be viewed,
printed or ordered from our web site,
www.dristeem.com
• Catalogs (which include dispersion
nonwetting distance graphs):
– XT Series Humidifier
– Ultra-sorb
®
• Installation, Operation, and Maintenance
manuals:
– Ultra-sorb
•
DRI-STEEM Design Guide
(includes steam
loss tables and general humidification
information)
On Dri-calc:
Dri-calc
®
is our humidification system
sizing and selection software, and may be
ordered at our web site, www.dristeem.com.
Included in Dri-calc:
• A comprehensive library of installation
guide documents, including:
– Rapid-sorb installation instructions
for vertical airflows
– Recommended dispersion placement
within a duct or air handler
Or call us at 800-328-4447
While obtaining documents from our web
site or from Dri-calc is the quickest way to
review our literature, we'd also be happy to
mail to you any literature you need.
IMPORTANT:
Failure to follow the recommendations in this section can result
in excessive back pressures on the humidifier. This will result in
unacceptable humidification system performance such as water
siphoning from the steam cylinder, blown water seals, erratic water
level control, and spitting condensate from the dispersion tube(s).
XT_IOM_Jan_2008.pdf 22 11/19/2009 10:13:37 AM
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