Installation and Maintenance
EHU-600 Series Humidifiers
27
Figure 27-1: Three Phase Tank
with Barriers Installed
Figure 27-2: Single Phase Electrode
Installation Models EHU-601 and 602
Figure 27-3: Electrode Installation
Model EHU-600
Chart 27:1
Approx.
Position
Spacing
Voltage / Condition
#3 with
380-600 Volts / high
barriers
1
1
/
4
"
conductivity water
208-240 Volts / high
#3
1
1
/
4
"
conductivity water
208-240 volts / medium
#2
1"
conductivity water
208-240 Volts / low
#1
3
/
4
"
conductivity water
d.
Put a stainless steel lockwasher and nut on each stud and
tighten all nuts. (A 7/16" socket on a 6" or longer extensions
makes this easier and safer!)
e.
Check the spacings between the electrodes and make sure
they are equal (3 places). Bend the electrodes by hand to
adjust spacings.
f.
When reinstalling push pin connector, make sure they are tight.
See Figure 6-3 and 6-4.
NOTE:
If barriers are used, electrodes must be in #3 position.
Models EHU-601 and EHU-602 – Single Phase
a.
Clean the inside of the steam generator thoroughly and rinse
with clear water.
b.
Set the jumper strip in place first (see Figure 27-2). Then set
the outer electrode in place and install a stainless steel
lockwasher and nut on the three outer studs, install the pan
head screw as shown. Tighten the nuts and screw. (A 7/16"
socket on an extension makes this step, and the next, much
easier and safer!)
c.
Set the two flat washers in place as shown. Then set the
inner electrode in place and put a lockwasher and nut on each
of the inner studs. Tighten all nuts.
CAUTION: To ensure proper and safe operation, all parts must
be assembled exactly as shown. Use the high water probe as
a location reference.
d.
When reinstalling push pin connector, make sure they are tight.
See Figure 6-3 and 6-4.
Model EHU-600 – Three Phase
a.
Clean the inside of the steam generator thoroughly and rinse
with clear water.
b.
High voltage units are supplied with a barrier/drain screen
assembly in the lower tank half to reduce the possibility of arcing
and increase electrode life. Inspect the barrier/drain screen
assembly and replace if necessary.
c.
Place a flat washer and O-ring on each 1/4" electrode stud
(see Figure 27-3).
d.
The other mounting hole on each electrode is attached to the
tank top with the slotted self-tapping screws. (See Figure 28-1)
e.
From the outside, install a flat washer and 1/4" hex nut on each
electrode stud (see Figure 27-3). Tighten these so they are snug.
f.
See Section 5 of Installation Procedure (Page 6) for information
on installing steam generator in unit.
Lock washer
& Nut (8 places)
Outer
electrode
Inner
electrode
Jumper
Strip
Panhead
Screw
High Water
Probe
Flat
Washers
Washer
Hexnut
O-Ring
Washer
