35
STS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
DISPERSION TUBE MOUNTING
• See the hose kit sizes in Table 35-1 for single tube applications.
• Orient dispersion tube(s) so that tubelets (steam orifi ces) point up.
• See Table 36-2 for dispersion tube pitch requirements.
• When mounting the humidifi er above the level of the dispersion tube(s), see
drip tee installation in Figure 34-1.
CONDENSATE DRAIN PIPING
• Minimum diameter (ID) for draining from one or two dispersion tubes:
3/4" (DN20)
• Minimum diameter (ID) for draining from three or more dispersion tubes:
1" (DN25)
• Condensate drain piping must be rated for 212 °F (100 °C) continuous
operating temperature.
• Condensate drain line must be piped as shown in the fi gures 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 fl ash steam, or
condensing on nearby surfaces may occur.
• All drain lines must be installed and sized according to governing codes.
mc_020111_0908
Table 35-1:
Single dispersion tube capacities
Tube size
Insulated
(High-Effi ciency Tubes)
Uninsulated
Without drain
With drain
Without drain
With drain
inches
DN
lbs/hr
kg/h
lbs/hr
kg/h
lbs/hr
kg/h
lbs/hr
kg/h
1½
40
29
13.2
65
29.5
28
12.7
62
28.2
2
50
65
29.5
97
44.1
62
28.2
93
42.3
Notes:
•
Single dispersion tube available with face width between 6" (152 mm) up to 120" (3048 mm)
in 1" (25 mm) increments.
•
If face width is <19" (483 mm), tube capacity may be reduced. Consult DriSteem or see
DriCalc for the correct capacity.
• Hose kits are available that include dispersion tube, 10 ft (3 m) of steam hose, and hardware
Dispersion: Single tube and multiple tube
