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Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
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16
Connect the dispersion tube to the steam generator using 11/2” (EHU-801) or 2” (EHU-803,804) nom. size hard copper tube
(customer supplied) and the two short hoses supplied with the humidifier. See Figure 17-1 and chart 17-1. If piping plus
duct back pressure exceeds 4” WC, please consult factory. In addition, a short length of nominal 1½” threaded black iron
pipe and a copper tube to female pipe thread adaptor must be supplied by the customer for attaching the piping to 803 or
804 tanks. A 1½” to 1¼” reducer will be required to connect the dispersion tube to the steam pipe of Models EHU-803/804.
See Figure 17-2.
The steam pipe must be free of kinks and sags to allow for gravity drainage of condensate (Provide pitch of 1”
per foot towards the unit ) Pipe supports may be required to accomplish this Insulate the copper tube to minimize
condensation
The preferred installation of the dispersion tube is above the humidifier with a maximum piping run of 20 feet (6m) or less.
Figure 17-3 shows the correct installation when:
• You cannot achieve a 1 inch (25.4mm) per foot
reverse slope of the piping.
• Piping runs range from 20 (6m) to the maximum
of 40 feet (12m) of equivalent run.
• Elbows or vertical risers must be placed in the
piping.
• When steam dispersion tube is below the
humidifier.
Pressure Loss in Copper Pipe
(40' Equivalent Run)
1-1/4"
1-1/2"
2"
120
#/Hr. Steam
1
2
3
4
5
In. WC
110
100
90
80
70
60
50
40
30
20
10
Feet of Equivalent Copper Pipe for Copper Pipe
Fittings
Fitting
1-1/4
1-1/2
2
45˚ Elbow
1.0
2.2
2.8
90˚ Elbow
2.5
4.3
5.5
90˚ Long Elbow
1.5
2.7
3.5
Tee
5.0
9
12
1-1/2" Copper Tube
Copper Tube
Female Pipe Adapter
1-1/2" Pipe
Hose Clamp
2" I.D. Hose
Figure 17-1
Table 17-1
Figure 17-2
Figure 17-3
Figure 17-4
