Herrmidifier Herrmidicool Technical Guide - Manual (Page 14)

the calculated load.
10. Air consumption shall be a maximum of 12
SCFM free air per 100 pounds of water
atomized. Compressor shall include an
appropriate safety factor.
D. OPERATING SEQUENCE
1. On a fall in relative humidity (in the space or
return air duct), the space or return air
transmitter shall send a signal to the controller.
2. A discharge high limit controller shall supply a
signal to the controller.
3. The controller shall have an adjustable setpoint
for both the return air (or space) and high limit,
and shall compare the sensed relative humidity
to the respective setpoints.
4. The controller shall output a proportional signal
based on the humidity input, which is closest to
its respective setpoint.
5. On multi-manifold applications, the manifolds will
be modulated in parallel or stages depending on
the application.
6. On DDC system, sensors and control algorithm
provided by other. 0-100% demand signal
provided to Herrmidifier Control Cabinet.
7. The system will automatically shutdown if the
airflow switch, located in the discharge duct, is
deactivated.
8. A power failure or compressor failure will
automatically shut the system down.
9. f water pressure is lost or reduced, the atomizing
heads shall sputter with no drippage. Complete
loss of water supply will cause the atomizing
heads to blow air only.
PART 3 EXECUTION
A. GENERAL
1. Install system(s) as detailed on the drawings
and/or as recommended by the manufacturer.
Shop drawings, indicating manifold sizes and
atomizing head capabilities shall be provided by
manufacturer. Certified independent air
consumption (at various output levels) and noise
data shall be available.
2. Manufacturer's representative shall provide
analysis, design and startup support of the
custom engineered humidification system(s).
3. Factory personnel will start system.
4. Compressed air shall be oil free and dry. Air
shall be filtered to a maximum of 0.3 micron.
Dryers and aftercoolers "applied" as the
compressor manufacturer recommends.
5. Water treatment, if supplied, demonstrates a
satisfactory water supply to the humidifier.
Herrmidicool Systems are manufactured by:
Herrmidifier
101 McNeill Road
Sanford, NC 27330
Water Quality Considerations
The Herrmidicool atomizing head was developed over
40 years ago and, because of its self-cleaning capability,
has operated on water as hard as 68 grains/gal. with
routine maintenance. However, when atomized water
droplets evaporate, they leave behind mineral residue in
the form of a fine dust. In an environment such, this dust
may not be a concern since the printing operation may
put more contaminants in the air than atomization. In a
computer room or cleanroom, mineral dust could be
disastrous.
Historically, water quality under 50 ppm Total Dissolved
Solids (TDS) and balanced on the Langelier Saturation
Index (LSI: -0.5 to +0.5), has been used successfully in
general office applications. However, the increased
sensitivity to IAQ will further restrict applications where
raw water can be used. The minerals can be removed
from the water or from the airstream downstream of the
humidifier. ALWAYS send a copy of the water analysis
from your site to Herrmidifier for review if you plan on
using raw water. Many sites have demineralized water
available for use in the humidification equipment. If this
is the case, simply confirm the water supply has been for
the humidifier has been demineralized or will be
provided as part of the humidification project. Your
application may contain sensitive equipment that
dictates what water treatment path is followed. Planning
in the design stages is far easier than reworking after the
fact!
If according to the results of your consultation with
Herrmidifier, the water is deemed unusable in raw form,
the water can be treated through a variety of techniques
including nanofiltration, reverse osmosis, deionization or
a combination thereof. Depending on your application,
Herrmidifier can suggest the most cost effective method
to solve your water related problems. The proper
selection of water treatment for a Herrmidicool system is
a very important step in the design process, and should
not be discounted.
HERRMIDICOOL Technical Manual