EIC Solutions AAC-140C-4XT Series User manual

1-800-497-4524 WWW.EICSOLUTIONS.COM 215-443-5190
EIC SOLUTIONS, INC.
Thermoelectric Air conditioner installation and operation manual
FOR 400 Btu MODEL #’S
AAC-140C-4XT
AAC-140C-4XT-HC
AAC-140C-4XT-XXXXX
Cooling Solutions for
Mission-Critical Electronics

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TABLE OF CONTENTS
1. GENERAL INFORMATION
1.1
PRINCIPLES OF OPERATION ........................................................................................................................................................................................................................... 3
2. INSTALLATION
2.1
CHOOSING A LOCATION .............................................................................................................................................. 4
2.2 ORIENTATION ....................................................................................................................................................................... 4
2.3
PREPARING THE ENCLOSURE .................................................................................................................................. 6
2.4
INSTALLING THE AIR CONDITIONER..................................................................................................................... 7
INSTALL THE DRIP PAN ................................................................................................................................................ 7
APPLY POWER ..................................................................................................................................................................... 7
3. OPERATION
3.1
THERMOSTAT SET POINTS AND HEATING COOLING UNITS ............................................................... 8
3.2
MAINTENANCE ..................................................................................................................................................................... 8
4. APPENDIX ........................................................................................................................................................................................... 10
EIC SOLUTIONS INC.
700 VETERANS WAY, SUITE 200
WARMINSTER, PA 18974
PHONE [phone] or 1-800-497-4524
FAX [phone]
EMAIL [email protected]
VISIT US ON THE WEB AT www.eicsolutions.com.
D-22 Rev. A 02/07/2020

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1. GENERAL INFORMATION
1.1 PRINCIPLES OF OPERATION
n 1834 Jean Peltier discovered that by passing a current through two dissimilar conductors the
junction of those materials will either absorb or release heat depending on the direction of the
current flow. Thirteen years earlier Thomas Seebeck had discovered that current would flow
when you placed a temperature gradient across the junction of two dissimilar metals. These
two discoveries were the basis of thermoelectrics. With the advent of modern semiconductors
thermoelectric devices became practical for real world applications and are now found in
everything from consumer goods to spacecraft.
Your EIC Solutions Thermoelectric Air Conditioner operates on this principle so there is no
compressor and no expensive, ozone depleting CFC’s. EIC’s air conditioners use Thermoelectric
“modules” sandwiched between high performance aluminum heat sinks and high CFM axial fans to
“pump” the heat from the inside of your enclosure to the outside, without exposing your delicate
electronics to any outside air or contaminates. See Figure 1.1.
EIC uses only the highest quality components in our air conditioners and you can expect
years of trouble free cooling from these solid-state devices. Every unit we sell is backed by our
one year parts and labor warranty.
FIGURE 1.1
I

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2. INSTALLATION
2.1 CHOOSING A LOCATION ON YOUR ENCLOSURE
When choosing a mounting location for your unit, be sure to keep air flows of both the
interior and exterior heatsinks and fans in mind. Adequate clearance between the fans/heatsinks
and nearby surfaces is required for unrestricted air flows which will ensure optimal performance
and long, trouble free operation. The general rule is to allow a minimum of two inches between
the fans or heatsinks and any surface. Refer to figure 1.1 for an air flow diagram.
Other considerations in deciding on a mounting location include; allowing access to
thermostat (this will be inside the enclosure) if frequent adjustments are to be made; allowing
access to the hot side heat sinks (this will be on the outside of the enclosure) for cleaning if the
unit will be used in a harsh, dirty environment.
2.2 ORIENTATION
Your AC unit can be mounted either vertically on the front, rear or side of your enclosure or
horizontally on the top of your enclosure. See Figure 2.1 and 2.2.
Vertically mounted 400 Btu units are always mounted with the exposed heatsink fins at the
bottom and the fans at the top. (Fig. 2.1) Vertical installations often require the use of a
Condensate Drip Pan (part # DP-140V) depending on a number of factors including internal
enclosure temperatures and ambient temperatures, humidity levels, quality of enclosure seals,
and frequency of enclosure opening. We strongly recommend the use of a drip pan to protect
the electronics from dripping condensate. (Fig. 2.1)
Mounting the unit with the fins pointing to either side or straight up will cause condensate
to drip in an uncontrolled manner, possibly damaging electronic equipment within the enclosure.
If one of these orientations is the only possible configuration, contact the Engineering Dept. at EIC
for a custom solution.
Horizontally mounted 400 Btu units require the use of the factory pre-installed drip pan to
prevent dripping condensate from damaging electronic equipment. (Fig. 2.2)
In either orientation, issues regarding access should be considered and minimum clearances
must be maintained as outlined in Section 2.1 of this manual.

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FIGURE 2.1
FIGURE 2.2

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2.3 PREPARING THE ENCLOSURE
To mount the 400 Btu unit you will need to cut an opening in your enclosure and drill
mounting holes. Cut out drawings showing the cut-out size, hole locations, and hole sizes have
been included in this manual (see Appendix). The instructions for installing the air conditioner are
printed below.
TOOLS AND MATERIALS NEEDED:
AAC-140C-4XT cut out stencil
Center Punch
Tape Measure and pencil
Jigsaw or suitable alternative
Electric drill
# 29 drill bit (.136”) (Not used for extension frame option)
# 8-32 tap and tap handle (Not used for extension frame option)
.203” drill bit (Extension frame option only)
# 8-32 x 3/8” stainless machine screws (supplied)
Nylon washers (supplied)
One neoprene gasket (supplied)
CUT THE OPENING AND DRILL MOUNTING HOLES IN THE ENCLOSURE
1. Using the guidelines provided in the installation manual choose an appropriate location for
the air conditioner on your enclosure.
2. Tape the cut out stencil to the enclosure in the location you have chosen.
3. Before marking, cutting or drilling check that the location meets the clearance
requirements as specified in the installation manual.
4. Using a pencil, center punch or other method, mark the exact center point of each
mounting hole on the enclosure. Also mark the four corners of the section to be cut out.
5. Remove the stencil and using a pencil or other method, connect the marks you made at the
corners of the cut out, forming a rectangle.
6. Using the jigsaw, cut the opening in the enclosure.
7. Using the appropriate drill bit, drill a hole at each of the mounting hole marks you made
earlier.
8. Using the 8-32 tap, tap each of the holes you have drilled (standard frame models only).
2.4 INSTALLING THE AIR CONDITIONER
INSTALL THE AIR CONDITIONER
1. Lay the air conditioner down with the cold side fan (side with the thermostat) facing up.
2. Take the supplied gasket and lay it down on the flange.
3. Take one of the supplied mounting screws and, from the under side of the flange, push it up
through the top right mounting hole, and through the hole in the gasket. The gasket hole is
undersized and will hold the screw in place. Repeat this on the top left mounting hole.
4. Set the AC unit in the hole you’ve cut in the enclosure, and using a screwdriver, carefully
start the two screws you attached to the gasket to the tapped holes in the enclosure. Do
not tighten these at this time.
5. Install the rest of the screws in the flange placing a nylon washer on each fastener and
screw them into the tapped holes in the enclosure. Do not tighten them completely. If you
are using a vertical drip pan, you will need to install the long screw in the center hole in the
bottom flange.

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6. Remove the two starter screws and place a nylon washer on each and reinstall.
7. Tighten all screws.
INSTALL THE DRIP PAN
1. Two hose fittings were provided with the drip pan, a right angle and a straight fitting.
Choose one and install it on the drip pan. Be sure if you use the right angle fitting it is
facing the desired direction prior to installing the drip pan.
2. There is one mounting hole in the drip pan, match this hole with the long mounting screw
protruding into the enclosure at the bottom of the AC unit. Push the drip pan onto this
screw.
3. Using the 8-32 keps nut provided, attach the drip pan to the air conditioner.
4. Attach the supplied PVC drain tube to the hose fitting on the drip pan. This tube should be
routed to the bottom of the enclosure and fed through a 3/8” hole to the outside.
5. If you mount the unit horizontally, the drip pan is pre-installed and you will only need to
remove the existing hole plug and install the hose fitting and PVC drain hose.
APPLY POWER
Once the air conditioner is mounted, check the serial label and confirm the voltage required
and then apply appropriate power as outlined below.
Universal voltage units:
For 120 VAC power plug the supplied IEC 320-C13 to NEMA 5-15P cord into the unit. Plug the
other side into a standard 120 volt, grounded outlet. Amperage for the unit at 120 VAC is
1.8 amps.
For 220 – 240 VAC power either remove the NEMA 5-15P plug from the supplied power cord
for a non-supplied plug or use a non-supplied IEC 320-C13 cord. Amperage for the unit at
220 VAC is 0.9 amps.
DC voltage units:
This unit will have a supplied power cord. Connect the wires to an appropriate power
source using standard safe wiring methods. Wire colors are as follows:
Red-Positive
Black-Negative
If you purchased a Digital Temperature Controller with your AC unit, a separate wiring diagram
has been provided which will show the correct method of applying power to your air conditioner.
Upon applying power to the air conditioner turn the power switch to the ON position. The fans
on the cold side (inside the enclosure) will come on. The hot side fan (outside the enclosure) may
also run depending on where the thermostat is set. The cold side fans always run when the unit is
powered on to circulate air within your enclosure thereby eliminating any “hot spots”. The hot
side fan will only run when the air conditioner is cooling.

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3. OPERATION
3.1 THERMOSTAT SET POINTS AND HEATING/COOLING UNITS
SETTING THE THERMOSTAT
Your EIC air conditioner is equipped with an adjustable thermostat. The set point you
choose should be based on the desired internal temperature of the enclosure in degrees
Fahrenheit. The air conditioner will run until the set point temperature is achieved within the
enclosure and then the hot side fans and the thermoelectric cooling modules will shut down. The
cold side fan will continue to run, circulating the air to maintain a uniform temperature within the
enclosure.
HEATING AND COOLING UNITS
If you purchased an HC unit (heating and cooling), the heater operation is controlled by a
fixed-point thermostat. This thermostat is set to turn the heaters on when the temperature within
the enclosure falls to approximately 45 F and turn the heaters off when the temperature rises to
approximately 55 F.
The cooling operation is controlled by the adjustable thermostat just as it is with a cooling
only unit. Cooling will prevent the heating function from turning on. For example, if the cooling
thermostat is set to 40 F then the unit will cool to 40 F, then switch directly to heating until the
cooling turns back on.
If the air conditioner is operating in an ambient environment that may drop below 45F, it is not
recommended that the cooling thermostat be set lower than 50F. Setting the thermostat lower
than 50F in this environment could result in ice forming on the cold side of the unit.
3.2 MAINTENANCE
MAINTENANCE
EIC Thermoelectric Air Conditioners are virtually maintenance-free. The only time
maintenance is required is when a unit is installed in an extremely dirty environment. In these
cases, the hot side heat sinks (outside the enclosure) should be inspected regularly for a build-up
of dust or dirt. If a build-up is present on the heat sink fins, it can be easily removed as follows:
1. Disconnect the power from the unit.
2. Dry dust/dirt can be removed using compressed air to blow out the heat sinks. Do not
direct any high-pressure air at the fans.
3. Your AAC-140C-4XT air conditioner is rated NEMA 4X and is designed to allow for water
wash down of the hot side of the unit, which is outside of the enclosure (never the cold
side which is inside the enclosure). A pressure washer can be used to carefully clean the
hot side heat sink fins when compressed air will not provide adequate cleaning. Never
direct high-pressure water at the fans. Never direct high-pressure water at the joint
formed by the mounting flange, gasket and enclosure. Never allow the cold side of your
unit to get wet

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Keeping the hot side heat sink fins free from any insulating build-up of dirt or dust will ensure
long, trouble-free operation of your air conditioner.
NEVER EXPOSE THE COLD SIDE OF THE AIR CONDITIONER (INSIDE THE ENCLOSURE) TO WATER.
If you have any questions about any aspect of your EIC air conditioner, don’t hesitate to call us at
the numbers listed below.

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Appendix A
Enclosure Cutout for 400 BTU Air Conditioner
STANDARD FRAME
HOLES TO BE 8-32 TAP
2.800
3.000
3.000
2.800
2.800 2.800
0.175 0.175
11.250
5.250

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Appendix B
Enclosure cutout for 400 BTU air conditioner
WITH EXTENSION FRAME OPTION.
HOLES TO BE .203”