37
STS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
Dispersion tube plate
Condensate drain plate
Steam hose or tubing. Insulate
tubing to reduce steam loss.
Do not insulate steam hose.
90° long sweep or
two 45° elbows
STS humidifi er
6" (152 mm)
recommended
Water seal
5" (127 mm)
Pitch
(see Note 2 below)
1" (25 mm)
air gap
Open drain required. See Note 1 below.
Condensate drain tube, by installer, minimum 3/4"
(DN20); must be suitable for 212 °F (100 °C) water
1/2" (DN15) O.D. condensate drain
tube; pitch 1/4"/ft (2%)
Pitch tube toward
drain 1/8"/ft (1%)
3/8" (M10)
mounting nut
Duct
1/4" (DN8) pipe
thread
Notes:
1. Locate air gap only in spaces with adequate temperature and air movement to absorb fl ash steam, or condensing on nearby surfaces my occur.
Refer to governing codes for drain pipe size and maximum discharge water temperature.
2. Pitch steam hose or tubing toward humidifi er:
– 2"/ft (15%) when using steam hose
– 1/2"/ft (5%) when using 1½" tubing
– 1/4"/ft (2%) when using 2" tubing
3. Dashed lines indicate provided by installer
DC-1473a
OM-351c
Table 37-1:
Dispersion tube and condensate
drain escutcheon plate dimensions
inches
mm
A
2.03
52
B
5.00
127
C
0.75
19
D
3.25
83
B
D
B
D
A
(diameter)
C
(diameter)
Secure and seal
escutcheon plates
Dispersion: Single tube and multiple tube
FIGURE 37-1: SINGLE TUBE DISPERSION WITH CONDENSATE WASTED TO FLOOR DRAIN
FIGURE 37-1: DISPERSION TUBE AND
CONDENSATE DRAIN ESCUTCHEON
PLATES
Dispersion tube
