Herrmidicool
“In-Duct” Air / Water Atomization
Humidification & Evaporative
Cooling System
TECHNICAL MANUAL
Your Total Capability Humidification Resource
Meeting Humidification Needs for Commercial &
Industrial
SECTION I THE HERMIDICOOL HUMIDIFICATION SYSTEM
Answering the Need for New Technology
In the days of cheap fossil fuels, the easiest and most
often used solution to a humidification problem was the
installation of steam humidifiers, which, although
inefficient and often difficult and expensive to install,
provided a simple, trouble-free means of raising the
relative humidity. As fuels became more expensive,
awareness of energy efficiency increased and in the
1970's, with growing concern about cancer causing
agents contained in many boiler treatment chemicals,
engineers began to look actively at alternatives such as
electronic steam and atomizing humidifiers.
The electronic steam humidifiers promised increased
energy efficiency (most operate at an average of 94%
efficiency as opposed to as low as 60% efficiency for
conventional steam humidifiers) and freedom from the
need for carcinogenic boiler treatment chemicals.
However, as computers and electronic switching devices
proliferated (they tend to create high internal heat loads),
so did the requirement for a more efficient humidifier-one that could deliver evaporative cooling as well as
efficient humidification. Air washers were considered,
but because of their large size and open tanks of water,
they could not easily be retrofitted to existing systems
and presented a hazard for clean environments. The
Herrmidicool is the only system able to answer all these
challenges!
According to thermodynamic laws, evaporating one
pound of water requires approximately 1075 BTU's. This
energy must be obtained either from direct input (as in
the case of steam humidifiers) or from the ambient air,
as a result of converting sensible heat to latent heat.
Quite simply, steam humidifiers increase enthalpy,
atomizing humidifiers do not. Therefore, during some
part of the year, the evaporative cooling provided by the
Herrmidicool system can be of great benefit, particularly
if the environment to be humidified has a relatively high
internal heat load, such as in a computer room. Chart 1
shows the psychrometric path of a steam humidifier
versus that of the Herrmidicool system. Pay particular
attention to the enthalpy lines, the temperatures and the
grains of moisture added.
The Psychrometric Chart is designed to show the
moisture content, volume, relative humidity and enthalpy
of air at various temperatures. The chart works
somewhat like a nomograph, in that intersections of the
lines represent various conditions. The vertical lines
correspond to scale A along the bottom of the chart,
which represents the dry bulb temperature of the air.
There are three sets of diagonal lines on the chart, one
set corresponding to scale B which represents the wet
bulb temperature of the air, one set corresponding to
scale C which represents the enthalpy of the air in BTU's
per pound of dry air, and the other set representing the
volume of the air in cubic feet per pound of dry air. The
horizontal lines correspond to scale D, which represents
the moisture content of the air in pounds of moisture per
pound of dry air. Lastly, there is a set of parabolically
curved lines, which represent the relative humidity in %.
To read the chart, you simply choose your known
conditions, lay them out on the chart and read the
corresponding intersection from the appropriate scale.
Consider the following examples:
1. If you have air at 70
O
F bulb and 60% RH, what is
the resultant moisture content, enthalpy and wet
bulb temperature?
To find the moisture content, run up the vertical dry
bulb temperature line at 70
0
F until it meets the
parabolic % RH line at 60%. Now follow the
horizontal line from this intersection to scale D and
read the moisture content (.0094 pounds per pound
of dry air).
To find the enthalpy, again find the intersection of
0
F dry bulb and 60% RH and follow the diagonal
70
line from this intersection to scale C and read the
enthalpy (27.2 BTU's per pound of dry air).
To find the wet bulb temperature, again find the
intersection of 70
the diagonal line from this intersection to scale B and
read the wet bulb temperature (61
O
F dry bulb and 60% RH and follow
0
F).
2. If you start with air at 700 F dry bulb and 20% RH
and add steam humidification until you reach 60%
RH, what is the starting and final enthalpy?
To determine the starting enthalpy, locate the
intersection of 70
0
F dry bulb and 20% RH and
follow the diagonal line from this intersection to scale
C and read the enthalpy (20.3 BTU's per pound of
dry air).
Since steam humidification contains its own heat, to
determine the final enthalpy, locate the intersection
of 700 F dry bulb and 60% RH and follow the
diagonal line from this intersection to scale C and
read the enthalpy (27.2 BTU's per pound of dry air).
3. If you start with air at 700 F dry bulb and 20% RH
and use the Herrmidicool system to add
humidification until you reach 60% RH, what is the
starting and final enthalpy?
HERRMIDICOOL Technical Manual
To determine the starting and final enthalpy, locate
the intersection to 70
OF
dry bulb and 20% RH and
follow the diagonal line from this intersection to scale
C and read the enthalpy (20.3 BTU's per pound of
dry air).
Since atomizing humidification does not increase
enthalpy, the final enthalpy will be the same.
However, if you follow the diagonal line from 70
O
F
dry bulb and 20% RH to its intersection with 60% RH
and then follow the vertical line from this intersection
to scale A you will now read a dry bulb temperature
of 57.2
0
F.
You will note that the dry bulb temperature will have
been reduced while the enthalpy has remained
constant. This evaporative cooling effect is what
makes the Herrmidicool invaluable in applications
where full or partial year-round cooling is required.
HERRMIDICOOL Technical Manual
Proven Method with Advanced Design
The Herrmidicool system is a sophisticated, modulated
atomizing system based on an enhanced 40-year-old
proven design. It incorporates a control technique that
monitors not only the room humidity conditions, but also
the supply duct conditions and can provide accurate
modulation for even the most precise environments. The
The Control Cabinet of the Herrmidicool system contains
all necessary valves, regulators and gauges to properly
control the air and water flow and pressures for
consistent, efficient atomization. Special controls insure
that no water can flow without proper air pressure and
also prevent the heads from dripping and spitting.
Failure of the air, water or electrical services is never a
cause for concern with the Herrmidicool system.
The Control Cabinet also contains all the controllers, set
point adjusters and interfaces required for any system.
The controls and devices used are always chosen on a
custom basis for each project to produce the most
efficient, accurate and cost effective scheme. Control
options such as direct digital interface, interlocks to A/C
compressors, outdoor air dampers, heating or cooling
coils and even central computer systems are supported.
controls are electronic and can be interfaced with
existing environmental control systems to provide the
most efficient operation at any given moment. Precise
control is what makes this system superior! The
Herrmidicool system consists of two major components:
the Water / Air Manifold and the Control Cabinet.
HERRMIDICOOL Technical Manual
A
A
A
The heart of the Herrmidicool system is the unique
patented Herrmidicool Atomizing Head, which is
designed to be self-cleaning, dripless and extremely
efficient. The internal atomization design requires only
0.12 SCFM at 30 psi for every pound of water per hour
atomized--a 100 lbs/hr system requires only 12 SCFM!
The stainless steel cleaning needle coupled with special
controls insures self-cleaning of all orifices and drying of
the head on shutdown. This self-cleaning technique
makes the head impervious to mineral content and
ambient contaminants. A special spring-loaded silicone
seat insures positive shut off of the pressurized potable
water line on shut down and eliminates any possibility of
viral or bacterial contamination. The atomizing head is
modulated through means of a modulating valve
producing a full 30:1 turndown, with droplet sizes
ranging from 0.3 to 10 microns.
An optional "blow-down" assembly completely empties
the lines of all water on shutdown - positive freeze
protection for roof top installations.
Two basic version of the control cabinet are available:
the AH-1200 (includes necessary sensor and air proving
switch) and the AH-1205 (Designed for DDC Interface).
H-1200 Series (Stand-alone Proportional + Integral)
1. When the relative humidity drops below the predetermined setpoint, the return air plenum sensor will send a signal to the
controller in the Herrmidifier Control Section.
2. When a high limit duct sensor is used, a signal is transmitted to
the controller with a decreasing signal as the relative humidity in
the discharge plenum approaches the high limit set point.
3. The controller will compare the two input signals with the
humidity setpoint and supply the appropriate signal to the
modulating water valve.
4. If the system employs a two-stage output system, the control
logic will provide modulating signals to each water valve.
duct airflow sensor provided with AH-1200, will shut down the
system automatically if there is no movement of air in the duct.
If so desired, the Herrmidicool system will be interlocked to preclude
simultaneous operations of mechanical cooling and evaporative
cooling.
H-1205 Series (DDC)
1. When the relative humidity drops below a predetermined setpoint, the Building Management System will send a signal to the
controller.
2. When a high limit duct sensor is used, a signal is transmitted to
decrease the control signal as the relative humidity in the
discharge plenum approaches the high limit set point.
3. The DDC controller will compare the two input signals with the
humidity setpoint and supply the appropriate demand signal to
the Herrmidicool Control Cabinet. The Herrmidicool controller will
condition the signal and transmit it to the modulating water valve.
4. If the system employs a two-stage output system, the control logic
will provide modulating signals to both water valves.
It is recommended that a duct airflow sensor be used in the application,
it will shut down the system automatically upon a loss of airflow in the
plenum
If so desired, the Herrmidicool system will be interlocked to preclude
simultaneous operations of mechanical cooling and evaporative
cooling.
HERRMIDICOOL Technical Manual
SECTION II DESIGNING A HERRMIDICOOL SYSTEM
Such things as airflow patterns, velocities, proximity to
coils and filters, cleanliness requirements, mineral
content of the feed water and the size and shape of air
handlers must be taken into account when designing a
Herrmidicool system. Because of the relative complexity
of all these factors, we recommend that you work closely
with your Herrmidifier representative in the planning
stages of any Herrmidicool project. He can review your
requirements; size the system and provide a quotation
with recommendations.
Determining Humidification Load After you have performed the humidity load calculation, (see Load Calculator Guide) you should then determine if the desired psychrometric end result is possible. The evaporative cooling effect of atomized water will lower the system air temperature reducing its ability to hold moisture. You must be sure that your air handling system can handle the moisture you wish to introduce. To determine this, use the Psychrometric Chart on page 3 by locating first the point directly on scale A that corresponds to the dry bulb temperature of the air being humidified. Then follow the diagonal line left to its intersection with 85% RH on the parabolic relative humidity scale. Now follow the horizontal line right from this point until it intersects with the vertical line from
scale A representing the dry bulb temperature of the
area to be humidified and read the resulting relative
humidity. If it is lower than what you desire, you will not
be able to put that much moisture in your air handling
system without some reheating of the air prior to the
Herrmidicool system.
Selecting Herrmidicool Location Within Air Handler System
Critical measurements are the distance from the heads
to the duct surface and the straight duct run required for
total evaporation. The second measurement is critical
only if the system is not installed prior to a cooling coil,
mist eliminator or evaporative media (Consult Factory if
this describes your application). Since the heads are
usually installed with the discharge at 90 degrees to the
air flow, the distance from the heads to the duct surface
is also important as any live mist that hits a surface will
impinge on that surface and coalesce, eventually
running. For that reason, it is important also to see that
no sensors, seams, cross bars or other obstructions are
in the path of the atomized spray, with the exception of a
cooling coil, mist eliminator or evaporative media.
The recommended distance from the heads to the top of
the duct is shown on Chart II and is based on the air
velocity in the duct or air handler.
Chart II
The optimum location for the Herrmidicool manifold is in
the air handler itself, upstream of the cooling coil with
four or more rows. The cooling coil insures a velocity of
less than 600 FPM with a large cross sectional surface
area and provides a natural mist eliminator and drain.
HERRMIDICOOL Technical Manual
In this type of installation, the size of the heads used is
not so important and can be chosen based on availability
of installation space for the equipment and distribution
patterns. (See Fig. 6)
Selecting Head Size Quantity
The atomizing heads are available in 6, 8, 10, 12 & 15
lbs./hr. capacities. As a rule, the larger the head, the
greater the moisture concentration and the greater the
distance required for evaporation. The water droplet size
created is approximately 30 micron on the Dv90 scale at
full output. The heads should be arranged so they are
mounted on a single manifold across the duct. NEVER
arrange the heads so that the spray of one hits the spray
of another as the water droplets will coalesce and
become larger, increasing the evaporation distance
required. Always try to use the smallest head than can
be fitted into the system, in order
AIR
IN
to enhance evaporation. Chart II should be used as a
guideline. The trick, of course, is to insure evaporation.
Larger droplets will take longer to evaporate and will
require more distance. On a cooling coil or mist
eliminator, larger droplets will mean more water down
the drain. Since increasing the output of an atomizing
head increases the droplet size, merely turning up an
undersized system will not accomplish the desired effect
and may even worsen the total evaporation. The best
design is one that uses the smallest possible head size
with the best distribution possible. The following figure
shows good design and spacing.
AIR
IN
WATER
IN
WATER
IN
Selecting Control Section
Control Cabinets are available in three different output
sizes as well as raw and DI/RO water. All connection
sizes, as shown in Table I are the same..
TABLE 1
CONTROL CABINET AIR CONNECTION WATER CONNECTION CAPACITY
All ¾” (19mm) ½” (13mm) Up to 1000 lbs./hr. (454
kg/h)
HERRMIDICOOL Technical Manual
When installed ahead of a cooling coil, the rule of thumb
is that if the heads are placed 3’ upstream of the coil, 1%
of the total capacity of the system will go down the drain,
at 2', 2.5% will drain away at 1’ or less, >5% will be lost.
A small amount of run down on the coil is good and
tends to keep the coil clean and free of any mineral
deposits (see section on mineral content in water). (See
Fig. 1)
Since the object is to utilize the cross-sectional surface
area, more than one manifold should be used on tall,
multiple coil sections. (Each manifold would be staged
and modulated). The heads on each manifold may be
angled up and/or down as required to enhance the
distribution of the spray. (See Fig. 2)
HERRMIDICOOL Technical Manual
If it is desired to place the Herrmidicool manifold in the
supply duct, care must be taken to insure that certain
distances are maintained. As shown in Figure 3, the
preferred method is to install an expanded duct section,
which allows the velocity to be decreased, and permits
the use of a mist eliminator with drain pan. The entire
section must be sealed and drained. This method
provides a fail-safe installation. As with systems installed
in air handling units, it is advantageous to use a larger
number of small capacity heads as they will produce
smaller droplet sizes and provide better coverage of the
cross-section of the duct allowing faster and more
efficient evaporation.
NOTE: Entire section must be sealed
and drained
HERRMIDICOOL Technical Manual
External Duct Plate Applications
If the duct is not high enough for proper turning of the
spray to prevent impingement, the atomizing heads may
sometimes be mounted to an "External Duct Adapter
Plate" which suspends the manifold and atomizing
heads outside the duct and thus may gain the necessary
distance for proper turning of the spray in the air stream.
FIGURE 4
Warning: Before
obtaining access to
terminals, all supply
circuits must be
disconnected.
This technique has the added feature of increasing the
ease of maintaining the system. This is only possible
with the Herrmidicool atomizing heads because of their
high discharge velocity. This technique also permits the
use of the Herrmidicool system in ducts carrying
contaminated, corrosive or high temperature air.
General rules on placement of the Herrmidicool
system in air handlers:
The minimum distance between each of the heads is 3".
The minimum distance between the end heads and the
side of the duct or air handler is 12".
To determine the proper head spacing on the manifold,
subtract 24" from the duct width and divide the
difference by the number of heads minus one. If this is
less than 3", multiple manifolds must be used, or the
head capacity increased, to reduce the number of
heads.
If multiple manifolds are used, alternate and stagger the
location of the heads between successive manifolds to
provide and an interlocking spray pattern. (See Fig. 2)
If duct height is greater than (2 x Distance from top of
head to duct casing) (ref. Dim. A) the head manifold may
be centered in the duct with the heads alternately
spraying up and down. Otherwise, the head manifold
must be placed as low or as high as possible in the duct
with the heads spraying 90
0
to the airflow. The minimum
duct height for installation of atomizing head within the
duct is Dimension A + 12.
If the duct height and head size do not allow for the
manifold to be mounted in the duct, the manifold may be
mounted externally be means of an external duct
adapter plate.
Placement of the Herrmidicool manifold in a return
plenum should be avoided as most air handler systems
involve some amount of exhaust. The atomizing head
manifolds should NEVER be placed in a lined duct, as
the droplets will impinge on the liner.
If the manifold is placed upstream of the cooling coil and
interlock to prevent the A/C system from operating
simultaneously is recommended. This takes full
advantage of the evaporative cooling provided by the
Herrmidicool system. If the manifold is placed downstream of the cooling coil, you should specify an
interlock to prevent the Herrmidicool from operating
when the A/C is on, which could cause condensation in
the duct.
HERRMIDICOOL Technical Manual
Special Applications - Roof Top Air Handlers
In many cases, the air handlers, in which the
Herrmidicool system will be installed, will be located on
the roof of a building, exposed to the weather. In these
cases, it is important to keep freeze protection in mind.
Although the water lines of the system may and should
be heat traced, it is also wise to remove the water from
the system when it is not in use to prevent freezing in a
power failure. Herrmidifier makes available such features
as a freeze-stat interlock and blow-down capability. This
special system drains all water out of the system on
any shut down, whether caused by a power failure,
freeze-stat alarm or normal shut down.
Figure 5 shows a typical roof top installation with the
heads mounted ahead of the cooling coil, in the folds of
the filters.
Because of the cone-shaped discharge pattern from the
Herrmidicool heads, such installations are possible. Note
that the Control Cabinet is mounted below the roofline in
the warm air space of the building. This is recommended
as the system will only clear out the water in the lines
BETWEEN the control section and the atomizing
manifolds. It is also recommended that the air and water
lines be run through the supply or return plenums into
the unit. This keeps the lines warm and prevents their
exposure to outside freezing conditions. As with all
installations, Chart II should be used in laying out this
type of system. Again it is wise to contact Herrmidifier.
HERRMIDICOOL Technical Manual
Select the Control Section
Herrmidifier makes available two standard control
schemes one using electronic controls and sensors, and
the other using direct digital interface that accepts a
demand signal from an existing controller or energy
management system and operates the Herrmidicool
accordingly. All Control Sections require a 110/1/60
volt power supply.
Options, such as special blow-down control sections,
delayed on or off, enthalpy compensation, and freeze
and A/C interlocks are available on request. These
options are useful for rooftop air handlers such as shown
in Fig. 5. Other options are available on a customized
basis. All optional controls should be specified as to
who will supply them. (See suggested specifications at
back of this manual.)
The typical control scheme involves the use of “double
input modulation” which is a technique using both a high
limit duct sensor and a control sensor (placed either in
the room or return duct), played off against each other to
produce the maximum use of the system without “short
cycling”. This technique takes maximum advantage of
the potential evaporative cooling effect of the
Herrmidicool system and insures accuracy for critical
applications.
For special applications or interface problems, contact your local Herrmidifier representative or contact Herrmidifier
directly. Special applications are our specialty.
Place the Order
At this stage, Herrmidifier representatives will review
your application and plans to insure that the
Herrmidicool system is in fact the best possible
designed will work to the maximum benefit for you. The
engineering after the sale is no less important than the
engineering before the sale.
humidifier for your application, and that the system as
HERRMIDICOOL Technical Manual
Herrmidicool Suggested Specifications
15781 HUMIDIFIERS
PART 1 GENERAL
A. SCOPE
1. Furnish and install as indicated on the drawings
an in-duct atomizing humidification and
evaporative cooling system complete with
Controls Cabinets with Modulating Control
Sections, and Atomizing Manifold Assembly.
Note: Manifolds are designed to introduce
moisture into an airstream. This airstream may
be either a traditional duct or AHU or the
discharge of an air turnover unit.
2. Warranty system for a period of two years from
date of shipment.
3. Provide owner's manual to cover installation,
startup, operating and maintenance instructions.
4. Water quality is essential to operation of unit.
Complete water analysis to be provided to
manufacturer for recommendations to enhance
performance and minimize maintenance.
5. Refer to schedule on drawings for capacities.
PART 2 PRODUCT
A. CONTROL CABINET
1. Factory fabricated and tested.
2. All internal components prewired and prepared
to terminals, ready for field connections.
3. ON-OFF switch with "Power ON" lamp.
4. Standalone systems provide supply and return
air humidity readings. DDC Interface system will
accept a 0-100% demand signal from building
automation system.
5. Relays for each stage (where applicable) of
control allowing stages to be controlled in
parallel or series.
6. Controls to incorporate a clean-out cycle time to
keep the heads clean and in working order.
7. Electrical requirements are 120 volt, single
phase. Maximum amp draw will be 5 amps per
control section or stage. Other voltages are
available.
8. Optional - The system shall incorporate an
automatic blow-down technique to empty the
water lines of all liquid on shutdown to prevent
freezing.
B. MODULATING CONTROL SECTIONS (In Control
Cabinet)
1. Each humidification system shall consist of two
control sections; one for compressed air supply
and the other for modulating water supply.
2. The water control section shall consist of a ball
valve, pressure regulator with strainer, pressure
gauges, water modulating valve and a solenoid
valve(s). Water pressure to the control section
shall be 50 psi and water pressure to duct
manifold shall be maintained at 40 psi minimum.
3. The air control section shall consist of a ball
valve, pressure gauge, solenoid valve, pressure
regulator with strainer, and an air pressure
switch. Compressed air to the control section
shall be 60 psi and air pressure to the duct
manifold shall be maintained at 30 psi.
4. If aggressive water is supplied, the water control
section will be constructed of 300 series
stainless steel components that resist
degradation.
5. All air & water piping shall be type "L" copper or
stainless steel.
C. ATOMIZING HEAD MANIFOLD
1. Manifold shall be factory assembled unit
consisting of air and water piping and atomizing
heads. Materials used will be based on water
quality.
2. Atomizing head capacity shall be (6), (8), (10),
(12), (15) pounds of water per hour. Larger
capacity heads will not be accepted. Heads will
be positioned to provide the maximum possible
distribution.
3. Atomizing heads shall be of materials not
adversely affected by the purity or
aggressiveness of the water, easily
disassembled for servicing with self-cleaning
and purging feature to provide a complete dripfree operation. Average droplet size will not
exceed 30 micron at 100% output (on the Dv90
Scale) and will decrease as the system
modulates downward. Documentation of droplet
size available on request.
4. Atomizing heads will work on the internal mix
method.
5. External mix heads and heads with external
appendages are not acceptable.
6. Each head will not exceed 81 dBA when in
operation.
7. Single manifold systems to have full modulation
with a 30:1 turndown ratio. Dual manifold
systems to have full modulation on each stage.
8. Air/water ratio will increase as the system
modulates, which will reduce the droplet size.
Increasing or constant air/water ratios on
modulation will not be accepted.
9. Manifold length shall be as indicated on the
drawings or sized by the manufacturer to meet
HERRMIDICOOL Technical Manual
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.
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
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
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
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