36
STS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
B
B
90° long sweep or
two 45° elbows
STS humidifi er
Secure and seal duct
escutcheon plate
Pitch*
Tube pitch 2"/ft (15%)
3/8" (M10)
mounting nut
Duct
Dashed lines indicate provided by installer
* Pitch steam hose or tubing toward humidifi er:
– 2"/ft (15%) when using steam hose
– 1/8"/ft (1%) when using tubing
OM-7512
Single dispersion tube without
condensate drain
Dispersion tube
escutcheon plate
Steam hose or tubing. Insulate tubing
to reduce steam loss. Do not insulate
steam hose.
Table 36-1:
Dispersion tube escutcheon plate
dimensions
for 2" tube
inches
mm
A
2.03
52
B
5.00
127
Table 36-2:
Pitch of dispersion tube(s) and interconnecting piping for Single tube or multiple tube evaporative dispersion units*
Condensate drain
Type of
interconnecting piping
Diameter of
dispersion tube and
interconnecting piping
Pitch of
interconnecting piping
Pitch of
dispersion tube(s)
Pitch of
condensate drain
Without drain
Steam hose
2" (DN50)
2"/ft (15%)
toward humidifi er
2"/ft (15%)
toward humidifi er
No drain
Tubing
2" (DN50)
1/8"/ft (1%)
toward humidifi er
With drain
Steam hose
2" (DN50)
2"/ft (15%)
toward humidifi er
1/8"/ft (1%)
toward
condensate
drain
1/4"/ft (2%)
toward fl oor drain or
toward humidifi er if
humidifi er is below
dispersion unit
Tubing
2" (DN50)
1/4"/ft (2%)
toward humidifi er
* When piping over an obstruction, see the drip tee installation illustration on Page 38.
A
(diameter)
Dispersion: Single tube and multiple tube
FIGURE 36-1: SINGLE TUBE DISPERSION WITHOUT CONDENSATE DRAIN
