FIGURE 4A
Elevation (continued)
If the dispersion tube must be mounted below the humidifier or
if the steam hose needs to run up and over an obstruction, a drip
tee with drain trap, Part #4028, must be installed as shown in
Figure 4. When using a fan pack, adding Part #4028 close to the
humidifier outlet can help prevent noise from gurgling as shown
in Figure 4A.
CAUTION
Controlling condensate flow and collection in an
electrode steam humidifier system is critical to
maximum performance. Failure to follow the steam
piping recommendations in this manual can cause
system pressure fluctuations and increase cylinder
pressure, and condensate noise.
Distance from Humidifier to Dispersion Tube
The capacity of the humidifier is reduced by the length of
the steam hose or pipe due to condensation. The maximum
recommended length of steam hose is 6 feet. Use hard pipe
insulated with 1” fiberglass for lengths greater than 6 feet.
Table 4 provides humidifier capacity with various lengths of
steam hose and pipe. If 6-foot steam hose does not reach from
humidifier to dispersion tube, splice in 1” copper pipe using
3/4” x 1” reducing couplings as shown in Figure 5.
INSTALLATION INSTRUCTIONS (CONTINUED)
Pitch
Obstruction
90° long
sweep or two
45° elbows
6" min
8" min
Insulate hard pipe to
reduce steam loss
To
Dispersion
Tube
1" air gap
Open drain required,
see note 1.
Drip tee installation for
piping over obstruction,
or if dispersion tube is
lower than humidifier.
NOTES:
1. Refer to governing codes for
drain pipe size and materials.
2. Support steam hose so there
are no sags or low spots.
Drip tee
Drain trap
Part #4028
FIGURE 4 – Dispersion Tube Mounted Below Humidifier
90-1520
90-1527 90-1844
Steam Hose
Dispersion
Tube
Steam Hose
1-1/2" Hose Clamp
1-1/2" Hose Clamp
1" Copper Pipe
3/4" x 1"
Reducing Coupling
Humidifier
#4028 KIT
CONTENTS:
Hose Clamps (5)
Trap (1)
Tee Assembly (1)
Tee
Assembly
Flared
End
Trap
Note: Prime with water
before using humidifier
Hose
Clamp
Hose Clamp
To Steam
Dispersion Tube
or Model 850
Fan Pack
Steam
Hose
1" I.D.
Steam Hose, 1" I.D.
(Downward Slope to Tee)
Drain Hose
7/8" I.D.
Steam Hose
1" I.D.
(Downward
Slope from
Humidifier
to Tee)
Hose Clamp
Steam
Humidifier
FIGURE 5
8
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