Installation and Maintenance
EHU-600 Series Humidifiers
25
Note: Arcing or flashing in the steam generator tank can be caused
by one or more of the following:
1.
Poor drainage
2.
Abnormal water conditions
3.
Dirty tank (needs cleaning)
If you notice arcing, shut the unit off and call the factory before
restarting unit. If water conductivity is higher than 600
µ
mhos/cm
2
and arcing is occurring, a special increased drainage EPROM may
be required. Consult factory.
Optimum water level: As you are aware by now, water level plays a key
role in EHU Amperage Control. The EHU will change water level
automatically to adjust humidity output. Therefore, to provide optimum
humidity control, the tank water level should be within 2" of the center
of the steam generator.
3.
Steam Generator Cleaning Procedure
This procedure is intended as a guide only. Read and follow label
directions on any cleaning product. Check local codes before disposing
of chemicals.
Caution: Muriatic acid can cause severe chemical burns if not handled
properly. Wear rubber gloves and eye protection when using. Read
and follow carefully the safety procedures on the package.
a.
Obtain several gallons of muriatic acid. Muriatic acid is a name
for weak hydrochloric acid. It is available in most hardware,
pool chemical, or farm supply outlets.
b.
Let steam generator tank cool after removal from EHU unit.
c.
Examine the tank inside by looking down through the steam
outlet (top connection). Be sure the tank is cool.
1.
If tank is black or dark brown, it can't be chemically cleaned.
The electrodes may have disintegrated. The tank will
require a thorough cleaning and possibly electrode
replacement.
2.
If tank has white/tan/grey mineral accumulations, estimate
how high the tank must be filled with muriatic acid to
dissolve the minerals. Never fill the tank more than 2/3
full.
d.
Plug the tank bottom. Move the tank to a location where disposal
and clean up will be easy.
e.
Take care to add the acid only to the tank insides. The
outside electrical terminals or metal flange parts may be
damaged by the acid.
Figure 25-1: Optimum Water Level
