Installation and Maintenance
EHU-600 Series Humidifiers
6
4.
Connect Drain
Connect to a suitable waste draining system, an open drain is recom-
mended. Local plumbing codes may specify details of this connection.
Be sure the drain line is well pitched (recommend 1" per foot) and is
minimum 1" size copper pipe. Do not use PVC pipe. Drain water is hot.
Drain the water where it will not present a hazard to personnel. Be sure
the cabinet drain (EHU-601/602 only) has a 6" water seal ("P" trap). Note:
A special EPROM is available to temper drain water to 160
o
F or lower.
Consult factory.
Model EHU-600: Steam generator drain and cabinet drain are the same,
1" O.D. A short piece of 1" I.D. clear hose is provided.
Models EHU-601 and 602: Steam generator drain is 3/4" NPT. Cabinet
drain is 5/8" O.D. (See Section 13 Submittal Drawing).
5.
Install Steam Generator
Model EHU-600: The steam generator is shipped installed on the
EHU-600 model. Using wrenches, be sure steam generator tank connec-
tions are installed and tightened according to the tank label (see Fig. 6-1).
Models EHU-601 and 602: The steam generator(s) is shipped
separately on the EHU-601 and 602 models. Make sure the O-ring is
properly placed in the tank drain adaptor (see Fig. 6-2). Insert the bottom
center connection of the steam generator into the drain adaptor. Connect
the push-on socket plug electrical leads to the electrode connectors
located on top of the steam generator (see Fig. 6-3). Make sure the push-
on plugs are tight (see Fig. 6-4). Remember, a loose joint is a hot joint.
NOTE: Please consult factory for duct applications offering high static
pressure (4" W.C. or greater or high velocity ducts >2000 FPM).
6.
Install Steam Dispersion Tube
a. Verify that the proper length and type of steam dispersion tube
has been selected. See Chart 6-1 for proper dispersion tube
lengths. The standard dispersion tube has a built-in slope to allow for
gravity drainage of condensate back to the steam generator (see
Fig. 7-1). When the dispersion tube capacity is greater than 40
lbs/hr the steam flow rate is too high to allow for gravity drainage
and the EHU dispersion tube with 1/2" O.D. drain tube must be
used (see Fig. 7-2).
For dispersion tube without drain: Cut a 1 5/8" diameter hole in
the duct (template provided). See Figure 7-3A.
For the dispersion tube with drain: Cut hole in duct as shown in
Figure 7-3B. Connect 1/4" pipe or 1/2" O.D. tubing to the drain
tube. A template is included for cutting holes in the duct.
b. Select a location on the duct that provides adequate length for
vapor mixing and the shortest connection length to the humidifier.
If steam piping run is more than 20 feet, install a "P" trap drain
every 20 feet (see Fig. 7-5). Maximum piping run is 40 feet.
Figure 6-1: Steam Generator Tank
Connections
Figure 6-2: Generator Tank Installation
Figure 6-3: Electrode Connector
Figure 6-4: Electrode Connector
Push on Plug
Chart 6-1: Selecting Proper Steam
Dispersion Tube
Model EHU-
Length Duct Width
Weight
600, 601 & 602
O.D.
L (cm)
Min.
Max.
lbs. (kg)
D-1
1-1/2" (38)
12" (30)
11" (28)
16" (41)
2 (1)
D-1.5
1-1/2" (38)
18" (46)
17" (43)
22" (56)
2 (1)
D-2
1-1/2" (38)
24" (61)
23" (58)
34" (86)
3 (1.4)
D-3
1-1/2" (38)
36" (91)
35" (89)
46" (117)
4 (2)
D-4
1-1/2" (38) 48" (122) 47" (119) 58" (147)
4 (2)
D-5
1-1/2" (38) 60" (152) 59" (150) 70" (178) 5 (2.3)
D-6
1-1/2" (38) 72" (183) 71" (180) 82" (208)
6 (3)
Use two nuts to hold
power lead terminal – Use
TWO wrenches to tighten
this joint.
Leave space here.
This nut should be
only snug – do not
over tighten.
Steam Generator Tank
Be Sure Feet Set
In Cabinet Firmly
& Level
O-Ring Forms
Water Tight Seal
Tank Drain Adaptor
Tank
Electrode
Wire
Tighten with
1/8” Allen Wrench
Tighten by
Clamping with Pliers
Brass Connector
Unscrew Plastic Cover
