32
XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Note: Dashed lines indicate provided by installer.
OM-351-1
Condensate drain
A
Dispersion tube
Dimension A: 3.25" (82.5 mm) for 1½" tubes
A
Escutcheon plates
A
A
Single dispersion tube with condensate drain;
orient dispersion tube with tubelets (steam
orifi ces) pointing up.
Mounting nut, 3/8"–16 (M10)
Duct
Secure and seal
escutcheon plates
90° long sweep or two
45° elbows
Pitch tube toward drain 1/8"/ft (1%).
1/2" O.D. (DN15) condensate drain tube.
Pitch 1/4”/ft (2%) toward escutcheon plate.
3/4" (DN20) (minimum) condensate drain tube by installer. Must
be suitable for 212 °F (100 °C) water.
1/4" NPT (DN8)
6" (150 mm)
recommended
Water seal
5" (125 mm)
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; otherwise,
condensation may form on nearby surfaces. Refer to governing codes for
drain pipe size and maximum discharge water temperature.
Pitch*
Tubing must be grounded. Insulate
tubing to reduce steam loss. See Table
27-1 for maximum tubing lengths.
* Pitch steam hose or tubing toward humidifi er:
• 2"/ft (15%) when using steam hose
• 1/8"/ft (1%) when using tubing
4.5" (115 mm) minimum from bottom
of duct
OM-7694
XT Series humidifi er
Table 32-1:
Hose kit sizing by capacity
Hose kit
(steam hose,
dispersion tube,
and hardware)
Maximum
tube capacity
Insulated
Uninsulated
lbs/hr
kg/h
lbs/hr
kg/h
1½" (DN40) without drain
29.0
13.2
28.0
12.7
1½" (DN40) with drain
65.0
29.5
62.0
28.1
These capacities require
multiple tube assemblies
and cannot use a single
hose kit.
>65.0
>29.5
>62.0
>28.1
Capacities of Models XTP 025 through XTP096 require multiple tube
assemblies and cannot use a hose kit. For multiple tube assemblies, see
“Rapid-sorb” beginning on Page 33.
DISPERSION TUBE WITH CONDENSATE DRAIN,
MODELS XTP 010 AND 017
• See Figure 32-1.
• Maximum capacity of 1½" (DN40) dispersion tube
with condensate drain is 65 lbs/hr (29.5 kg/h)
insulated; 62 lbs/hr (28.1 kg/h) uninsulated.
• Models XTP 010 through XTP096 have capacities
requiring dispersion devices with condensate drains.
DriSteem recommends pitching steam tubing for
these models towards the dispersion device. For XT
Series humidifi ers with capacities more than 20 lbs/
hr (9.1 kg/h), the installer should not attempt to drain
condensate back to the cylinder. When a vertical riser
is required in the steam tubing, a drip tee is required
in order to eliminate a condensate collection point that
will restrict steam fl ow. See vertical riser examples in
Figure 28-1.
• If maximum developed length is more than 20' (6 m)
and duct static pressure exceeds 2" wc (498 Pa), a fi ll
cup extension kit (Figure 11-1) is required.
INSTALLATION
Single dispersion tube
Dispersion:
FIGURE 32-1: SINGLE DISPERSION TUBE WITH CONDENSATE DRAIN, MODELS XTP 002 THROUGH 017 ONLY
