DriSteem VAPORMIST Specifications Page 22

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18
VAPORMIST INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Dispersion:
High-efficiency Tube option
Dispersion assemblies with the High-efficiency
Tube option are designed to produce
significantly less dispersion-generated
condensate and airstream heat gain, which
reduces wasted energy by up to 85%.
These improvements are accomplished by
reducing the thermal conductivity of the tubes
with 1/8" of polyvinylidene fluoride (PVDF)
insulating material on the outside of the tubes.
These assemblies require careful unpacking,
installation, and handling. If your dispersion
assembly has the High-efficiency Tube option,
be sure to read this section carefully.
mc_060208_1320
DriSteem humidifiers operate with several types of dispersion assemblies for
open spaces and for ducts and air handling units.
Dispersion assemblies in ducts and air handling units must be positioned where
the water vapor being discharged is carried off with the airstream and is
absorbed before it can cause condensation or dripping.
Non-wetting distance is the dimension downstream from the leaving
side of the steam dispersion assembly to the point where wetting will
not occur, although wisps of steam may be present. This distance
was calculated during humidification system design and is dependent
on several application parameters. To determine your dispersion
assembly’s non-wetting distance, consult your system’s design engineer
or project documentation. Non-wetting distance can also be calculated
using DriSteem’s DriCalc sizing and selection software, available at
www. dristeem.com. Note that your current design conditions may vary
from conditions used for system design.
In general, the dispersion assembly is best placed where the air can 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, because the filter can remove
the visible moisture and become waterlogged;
before coming in contact with any metal surface;
before fire or smoke detection devices;
before a split in the duct; otherwise, the dispersion assembly can direct
more moisture into one duct than the other.
When draining dispersion condensate to an open drain, provide a 1"
(25 mm) air gap between the condensate drain piping and the drain.
Locate the gap only in spaces with adequate temperature and air movement
to absorb flash steam; otherwise, condensation may form on nearby
surfaces.
mc_060210_0838
INSTALLATION
Selecting the dispersion assembly location
FIGURE 18-1: ULTRA-SORB WITH THE
HIGH-EFFICIENCY TUBE OPTION
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