iring Schematics
VIII.
Maintenance
11-12
IX.
Trouble Shooting
13
X.
Accessories
14
XI.
Warranty
15
I. Introduction
Kooltronic Air Conditioners are designed to provide a cool, dehumidified environment for
your electronic components. There are models to fit virtually all sizes and shapes of
electronics enclosures, in capacities ranging from 1,000 to 60,000 BTU/H. Our
"closed-loop" design also ensures that your components will not be exposed to hot, dirty
operating conditions.
This Manual provides you with the necessary general information for properly installing
and operating standard Kooltronic Air Conditioners. Technical data and mounting
instructions are presented on pages 7 through 10.
2 3
II. Incoming Inspection
Kooltronic Air Conditioners are designed, built and packaged to withstand the shock and vibration normally
associated with shipment by common carriers. Occasionally improper handling during shipping causes damage.
Such handling could include unbanding of palletized shipments, failing to respect "This Side Up" arrows, rough
handling, falling off conveyors, excessive vibration, crushing, etc. Therefore, a thorough inspection should be
done upon receipt of all shipments. Any carton tears, dents, scratches, loose articles or evidence of oil are signs
of damage and should be noted on the Freight Bill. Cartons should be opened promptly and the units inspected
for CONCEALED DAMAGE. Kooltronic Air Conditioners must be delivered in the proper mounting position to
assure that damage to the compressor has not occurred during shipping. Any Kooltronic Air Conditioner that is
delivered removed from the banded pallet, lying down or double stacked should be refused.
An immediate claim MUST be filed with the freight carrier and an inspection requested. Retain all packing
materials. Kooltronic cannot assume responsibility for Consignee's failure to file a timely freight claim.
III. Product Handling:
1) Do not attempt to operate your Kooltronic Air Conditioner until you read and thoroughly understand this
Manual. See section VI PRE-INSTALLATION TESTING.
2) Before operating the Kooltronic Air Conditioner be certain that it is placed in its correct mounting position.
All Air Conditioners containing an M, P, or V as part of the model number are designed to operate
in a vertical position only. All Air Conditioners containing an H in the model number are designed
to operate in a horizontal position only. This placement must be done a minimum of 5 minutes prior to
operating in order to allow the compressor oil to drain to the compressor sump area.
CAUTION
3) Before operating this unit, all electrical wiring must be checked to assure the proper connection to the
correct power source. Minimum circuit ampacity should be at least 125% of the amperage found on the air
conditioner label for the corresponding voltage. Do not exceed the maximum fuse size found on the label.
4) We do not recommend that Air Conditioners be shipped to their final destination attached to an enclosure.
In the event that the Air Conditioner needs to be shipped attached to an enclosure it is strongly
recommended that proper support be provided for the Air Conditioner. Excessive vibration can occur if Air
Conditioners are not properly supported when shipped on enclosures, increasing the potential for internal
damage and voiding the warranty.
5)
PROCEDURE FOR PROPER PACKING AND SHIPMENT OF KOOLTRONIC AIR
CONDITIONERS: Keep Air Conditioner in proper upright position indicated by arrow markers. Pack Air Conditioner in an appropriate carton (preferably original carton if possible), with
adequate internal protective packaging, making sure carton is marked and is kept in correct
upright position. For local, controlled transportation, strap carton to a secure part of truck to prevent falling or
sliding, minimize vibration, etc. For common carrier shipment, band unit(s) securely to a pallet. Unpalleted shipment risks
severe damage which voids the warranty.
Kooltronic Air Conditioners must be operated in their proper mounting position. If attempts are
made to operate a unit that is not in its designed mounting position, permanent compressor
damage will occur. This action will void the warranty. To avoid compressor damage do not tip the
unit more than 45� from its proper mounting position. 4
IV. Product Identification and Labels
Each Kooltronic Air Conditioner includes an identification label. This label provides:
�
Model Number
�
Serial Number
�
Electrical power characteristics
�
Maximum and minimum ambient operating temperatures
�
Cooling capacity
�
Type and amount of refrigerant required for recharging
�
Design Pressure
�
Underwriters Laboratories Inc. Listed or Recognized Marks and NEMA ratings
We recommend you copy this information from your unit.
� �
When ordering parts, specify
the Model Number and Serial
Number.
�
Before operating, be sure that
the power source matches these
requirements.
�
Use of incorrect type or amount
of refrigerant will adversely affect
performance and may damage the
unit.
�
Make sure that these parameters
are met. Failure to do so may result
in permanent damage to the unit
MODEL NO.
SERIAL NO.
COOLING
AMBIENT TEMP.
VOLTS.
FREQ.
PH.
F.L.A.
MIN.
o
F
MAX
o
F
COOLING BTU
REFRIGERANT
DESIGN PRESSURE P.S.I.G.
LOW
HIGH
MAX. FUSE SIZE
SERVICE AIR FILTERS REGULARLY
ALLOW 5 MIN. BEFORE RESTARTING AFTER SHUTDOWN
UNAUTHORIZED SERVICE OR MODIFICATION VIOLATES WARRANTY
ALL MOTORS ARE THERMALLY PROTECTED
THIS PRODUCT IS PROTECTED BY ONE OR MORE OF THE FOLLOWING
PATENTS: 3,019,965 3,120,166 3,211,360 3,559,728 3,807,493 AND
OTHER PATENTS PENDING
MANUFACTURED BY:
KOOLTRONIC, INC.
PENNINGTON, NJ
VENTURA, CA
Air Conditioner
�
�
�
� � �
�
�
�
�
�
�
�
� 5
Kooltronic Air Conditioners are required when the equipment operating temperature must
be kept near or lower than the ambient room temperature, and/or the cabinet must be
sealed from dust, fumes, oil, corrosives and other contaminants.This Air Conditioner utilizes
a "Closed-Loop Cooling System" to ensure optimum performance of the installed compo-
nents.
Closed-Loop cooling seals the electronics enclosure from hostile elements in the environ-
ment.Two separate circulation systems are employed.The internal system cools and dehu-
midifies the air inside the cabinet, totally isolating the sensitive electronics and other com-
ponents from the environment.The external system uses circulating ambient air or water to
discharge the heat removed from the electronics.The heat is dissipated from the enclosure
by means of the vapor compression refrigeration cycle. This takes place in a hermetically-
sealed refrigeration system, utilizing either an air-cooled or water-cooled condenser heat
exchanger. The warm air inside the enclosure is drawn through the evaporator coil where it
is cooled, dehumidified and returned.
Any enclosure moisture accumulated on the evaporator coil is collected in the condensate
tray and released to the ambient air through the drain tube or the condensate evaporator.
The heat removed through the evaporator coil is transferred by the compressed
refrigerant to the condenser coil. Ambient air or water is then passed through the
condenser coil, where it absorbs the heat and is then discharged to the environment.
Kooltronic Air Conditioners are designed to operate continuously in order to eliminate
compressor cycling, which shortens compressor life and causes line transients. The cool
air discharge temperature is regulated by the capacity control (hot gas bypass) valve.The
unit is equipped with a Low Temperature Thermostat to prevent over-cooling. In applica-
tions having frequent voluntary or involuntary power interruptions, a Short Cycle
Protector is recommended to allow adequate time for the internal pressures of the
Air Conditioner to equalize before restarting.
V. Principles of Operation
CONDENSER OUTLET
(Heated Ambient Air Out)
CONDENSER HEAT
EXCHANGER
CONDENSER AIR
INLET
(Ambient Air In)
REFRIGERANT
FILTER DRIER
CONTROL
BYPASS VALVE
METERING
DEVICE
(Capillary Tube
shown)
COMPRESSOR
EVAPORATOR
HEAT EXCHANGER
COOL AIR TO
ENCLOSURE
ACCUMULATOR
CONDENSER
AIR INLET
(Ambient Air In)
HEATED AIR FROM
ENCLOSURE VI. Pre-Installation Testing
Before mounting the air conditioner to the enclosure, test for proper operation. This will
verify the shipping integrity of the system. Please follow the steps below prior to instal-
lation.
CAUTION
1. Allow the unit to sit in a upright position at a room temperature of 65�F minimum,
allowing the system to warm-up particularly in winter months.
2. Refer to the identification label for proper electrical voltage and current requirements.
Then connect the power cord to a properly grounded and fused electrical supply.
Leave the electrical power off.
3. Note the factory thermostat setting which is typically 75 to 80�F.
4. Adjust thermostat to its maximum setting.
5. If your unit is equipped with an on-off switch, move it to the on position.
6. Turn electrical power on.
7. Verify that the evaporator blower or fan is running.
8. Adjust the thermostat to its minimum setting. The compressor should start. On units
equipped with a short cycle protector, the compressor will have a delayed start of 6
minutes from the time power is applied to the unit.
9. Verify that the condenser blower or fan is running. Note, on units equipped with a low
ambient kit, the start of the condenser fan or blower will be delayed until the system
pressures rise.
10. Operate the air conditioner for approximately ten (10) minutes. During this period no
unusual noise or vibration should be evident. Both the evaporator and condenser fan