Specifications

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OM-7399
Figure 28-1:
Rapid-sorb installed in a horizontal airflow with header inside the duct
6" (152 mm)
Point tubelets (steam orifices)
perpendicular to airflow
Duct
Vapormist humidifier
Airflow
Dispersion tube
Slip coupling or hose cuff
90° long sweep or
two 45° elbows
Support bracket
5" (127 mm)
¾" pipe thread
(DN20) drain
¾" (DN20) copper
1" (25 mm) air gap
Open drain required.
Locate air gap only in spaces with adequate
temperature and air movement to absorb flash
steam, or condensing on nearby surfaces may
occur. Refer to governing codes for drain pipe
size and maximum discharge water temperature.
Position L-bracket so that flange is upstream
of dispersion tubes. This drawing shows the
L-bracket positioned for airflow back to front
Pitch header
toward drain
1/8"/ft (1%)
Secure and seal
escutcheon plate
Pitch*
Note:
* Pitch vapor hose, tubing, or
pipe toward Rapid-sorb:
– 2"/ft (15%) when
using vapor hose
– 1/8"/ft (1%) when
using tubing or pipe
Assembly and installation instructions for a Rapid-sorb installed
with header inside the duct (horizontal airflow)
1. Locate and cut the holes in ductwork or air handler for steam
header penetration, condensate drain piping, and header support
bracket fastener. Allow 1/8"/ft (1%) header pitch toward the
support bracket when you drill the hole for the header support
bracket fastener.
2. Loosely fasten the header in place.
3. Rotate the header 90° so the header stubs point horizontally in
the duct.
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is often less than 90°. Typically, due to the condensate drain
piping requirements, the header can be set on the floor of the
air handler, assembled in the vertical position, and then raised
and mounted in place.
4. Mount the dispersion tubes on the header with the slip
couplings or hose cuffs.
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tubes, take care not to shear the O-rings.
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the O-ring is resting on the face of the tubing.
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WARNING!
Dispersion tube, vapor hose, tubing, or hard
pipe can contain steam, and surfaces can be
hot. Discharged steam is not visible. Contact
with hot surfaces or air into which steam has
been discharged can cause severe personal
injury.
Vapor hose, tubing or pipe.
Insulate tubing and hard pipe
to reduce steam loss. Do not
insulate vapor hose. See Table
16-1 for maximum piping lengths.
VM-IOM-1108.pdf 30 4/21/2010 1:36:22 PM