Installation and Maintenance
EHU-600 Series Humidifiers
7
Preferably the location should be 6 inches down stream and/or 10 feet
upstream from any dampers, vanes, bends in the duct, or controllers
(i.e. high limit stat). Do not install the dispersion tube into ducts in which
airflow exceeds 2,000 FPM. Do not restrict airflow in ducts with a depth
of 8 inches or less. Avoid placing manifold in downward, high velocity
airflow as dynamic air pressure will restrict steam flow.
The preferred installation of the dispersion tube is above the humidifier
as shown in Figure 7-2. This allows for gravity drainage of condensate
back to the humidifier. Figure 7-4 shows the correct installation when
the steam dispersion tube is below the humidifier. If this installation is
used, a 1 1/4" copper tee may be used for the drain connection (see
Fig. 7-5).
Figure 7-1: Connection at Duct
Figure 7-2: EHU Dispersion Tube
with
1
/
2
" O.D. Drain Tube (For More
Than 40 lb/hr Capacity per Tube)
Figure 7-4: Disperson Tube
Below Steam Outlet on Humidifier
c. Insert the dispersion tube into the duct so the holes face
upward. Never install the tube with the holes facing downward.
Fasten the mounting plate to the outside of the duct with sheet
metal screws. If the dispersion tube is 36" long or more, support
the far end with threaded rod or similar means.
Figure 7-5: 1-1/4" Copper Tee for
Drain Connection
1-3/8" O.D. (1-1/4" Nom.)
Copper Tube
Hose Clamps
Steam Dispersion Tube
HOLES UP
Insulation
Hose Cuff
Built In Pitch
"Up" Label
Front
View
Holes in
Manifold to
be installed
in "UP"
position.
Duct above outlet
6" Water
Seal
Floor
Drain
Outlet
EHU
For steam capacity
above 40 lb/hr
For steam capacity
40 lb/hr or less
6.00
6.00
5.25
5.25
Ø
.22
4 places
Ø 1.75
Hole in
duct
Ø.22
4 places
6.00
R.88
6.00
3.50
1.00
5.25
R.37
5.25
Hole in duct
2.00
3.50
1.50
6" Water seal
See Fig. 7-5
Alternate Method:
1-1/4” Copper Tube
Soldered into Tee
Hose Clamp
Steam Hose
Dispension Tube
Hose
1-1/4" Copper Tee
Reducer
1/2" or 3/8"
Copper Tube
6"
Soldered Joints
Up
To Drain
Figure 7-3B: For Dispersion Tube
With Drain
Figure 7-3A: For Dispersion Tube
Without Drain
