DRI-STEEM XT Series Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 25
Installation
• See the following pages for detailed drawings and notes for
installing Single Tube and Multiple Tube dispersion assemblies.
• See the hose kit sizing table on this page for Single Tube
applications.
Dispersion tube mounting
• Orient dispersion tube(s) so that tubelets (steam orifices)
point up.
• See the table on the next page for dispersion tube pitch
requirements.
• When mounting the humidifier above the level of the dispersion
tube(s), see the drip tee installation drawing on Page 24.
Condensate drain piping
• Minimum diameter (ID) for draining from one or two dispersion
tubes: ¾" (DN20)
• Minimum diameter (ID) for draining from three or more
dispersion tubes: 1¼" (DN32)
• Condensate drain piping must be rated for 212 °F (100 °C)
continuous operating temperature.
• Condensate drain line must be piped as shown in the figures
on the following pages. Provide a 6" (152 mm) drop prior to a
5" (127 mm) water seal to:
− Ensure drainage of condensate from the header
− Keep steam from blowing out of the drain line
• After the water seal, run the drain line to an open drain with a 1"
(25 mm) vertical air gap. Cut the drain line at a 45° angle on the
end above the drain to permit a direct stream of water into the
drain pipe while maintaining a 1" (25 mm) air gap. Locate air gap
only in spaces with adequate temperature and air movement to
absorb flash steam, or condensing on nearby surfaces may occur.
• All drain lines must be installed and sized according to governing
codes.
Table 25-1:
Hose kit sizing by capacity
Maximum
tube capacity
Hose kit
(vapor hose, dispersion tube,
and hardware)
lbs/hr kg/h
28.4 12.9 1½" (DN40) without drain
56.8 25.8 1½" (DN40) with drain
> 56.8 >25.8
These capacities require
multiple tube assemblies and
cannot use a single hose kit.
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).
Dispersion: Single Tube and
Multiple Tube
XT_IOM_Jan_2008.pdf 27 11/19/2009 10:13:38 AM
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