24
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
OM-7551
6" (152 mm)
Point tubelets (steam orifi ces) perpendicular to airfl ow
Duct
CRUV humidifi er
Air
fl ow
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 fl ash 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 fl ange is upstream of dispersion tubes. This
drawing shows the L-bracket positioned for airfl ow back to front
Pitch header toward
drain 1/8"/ft (1%)
Secure and seal
escutcheon plate
Pitch*
INSTALLATION
WARNING
Hot surface and steam hazard
Dispersion tube, steam 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.
mc_060110_1555
mc_062810_0820-CRUV
* Pitch steam hose, tubing, or pipe toward Rapid-sorb:
– 2"/ft (15%) when using steam hose
– 1/8"/ft (1%) when using tubing or pipe
Steam hose, tubing or pipe.
Insulate tubing and hard pipe
to reduce steam loss. Do not
insulate steam hose. See Table
16-1 for maximum piping
lengths.
HEADER INSIDE OF DUCT, HORIZONTAL AIRFLOW
1. Mark and cut holes in ductwork or air handler for steam header
pen e tra tion, con den sate drain piping, and head er 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 hor i zon tal ly in the duct.
4. When installing in an air handler, the rotation of the header is often less
than 90°. Typically, due to the condensate drain piping re quire ments, the
header can be set on the floor of the air handler, assembled in the vertical
position, and then raised and mounted in place.
Dispersion: Rapid-sorb
FIGURE 24-1: RAPID-SORB IN A HORIZONTAL AIRFLOW WITH HEADER INSIDE THE DUCT
