Kooltronic Intrepid K2A4C30EP56TR User manual

Keep This Manual
With Air Conditioner
AIR CONDITIONER
OPERATOR'S MANUAL
CAUTION
BEFORE INSTALLING AND
USING THIS AIR CONDITIONER,
IT IS IMPORTANT THAT THIS
MANUAL BE READ AND
UNDERSTOOD THOROUGHLY
KOOLTRONIC, INC.
30 Pennington-Hopewell Road
Pennington, NJ 08534
609•466-3400
FAX: 609 • 466-1114
www.kooltronic.com
900-039-39 (8/21)
(CDR: 20346)
INTREPID
EP56 SERIES
K2A4C30EP56TR/BR
Find additional information on this
model at kooltronic.com, or use the
Technical Documents QR code
below.
Technical
Documents
K2A6C30EP56TR
with Serial Numbers up to F21A1357
K2A6C30EP56BR
with Serial Numbers up to C20A0647

TABLE OF CONTENTS
Page
I. Introduction 2
II. Incoming Inspection 3
III. Product Handling 3
IV. Product Identification and Nameplate 4
V. Principles of Operation 5
VI. Pre-Installation Testing 6
VII. Specific Model Data 7 - 9
Mounting
Drawings and Dimensions
Standard Features
VIII. Maintenance 10
IX. Trouble Shooting 11
X. Warranty 12
NOTE: Wiring Schematics are available on the specific model page of the Kooltronic website.
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 30,000 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 9.
2

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.
This Air Conditioner is designed to operate in a vertical 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
nameplate for the corresponding voltage. Do not exceed the maximum fuse size found on the nameplate.
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.
3
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 Nameplate
Each Kooltronic Air Conditioner includes an identification nameplate. This nameplate provides:
qModel Number
wSerial Number
eElectrical power characteristics
rMaximum and minimum ambient operating temperatures
tCooling capacity
yType and amount of refrigerant required for recharging
uDesign Pressure
iMaximum Fuse Size
oManufacturing Order Number
aUnderwriters Laboratories Inc. Listed or Recognized Marks and NEMA ratings
We recommend you copy this information from your unit.
qwo When ordering parts, specify the Model Number, Serial Number & MFG. Order Number.
eBefore operating, be sure that the power source matches these requirements.
r Make sure that these parameters are met. Failure to do so may result in permanent damage to the unit.
ALL MOTORS ARE THERMALLY PROTECTED
VIOLATES WARRANTY
UNAUTHORIZED SERVICE OR MODIFICATION
SERVICE AIR FILTER REGULARLY
OUTDOOR USE
COMPARTMENT ONLY
NEMA/EEMAC/UL50 BY UNDERWRITERS LABORATORIES, INC.
TYPE 1 SPECIAL PURPOSE AIR CONDITIONER EQUIPMENT
TYPE 3R & 12 INTERFACE TO THE ELECTRICAL ENCLOSURE ONLY
NEMA/EEMAC/UL50 BY UNDERWRITERS LABORATORIES, INC.
SPECIAL PURPOSE AIR CONDITIONER
FUSE SIZE
MAX.
HIGHLOW
Oz.REFRIGERANT
MAX.°FMIN.°F
AMBIENT TEMP.COOLING
ALLOW 5 MIN. BEFORE RESTARTING AFTER SHUTDOWN
Air Conditioner
DESIGN PRESSURE P.S.I.G.
MFG. ORDER NO.
KOOLTRONIC, INC. PENNINGTON, NJ
MANUFACTURED BY:
COOLING BTU
F. L . A .PH.FREQ.VOLTS
SERIAL NUMBERMODEL NUMBER
qw
eeee rr
ty
uu i
oa

V. Principles of Operation
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. These Air Conditioners utilize a "Closed-Loop Cooling System" to ensure
optimum performance of the installed components.
Closed-Loop cooling seals the electronic enclosure from hostile elements in the environment. Two separate
circulation systems are employed. The internal system cools and dehumidifies the air inside the cabinet,
totally isolating the sensitive electronics and other components 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.
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.
The unit is equipped with a Low Temperature Thermostat to prevent the evaporator coil from freezing and
must not be set below the factory setting of 75°F (16°F differential). If necessary the thermostat may be
adjusted to increase the temperature within the cabinet. Unlike thermostats that are commonly found in
household air conditioners that control the room temperature, the thermostat found on the EP56 monitors
the return air from the enclosure to prevent the evaporator from freezing. In conditions of low ambient
temperature and low enclosure load, the thermostat regulates the return air temperature from 75°F to 91°F.
If the unit is equipped with an optional non-adjustable high temperature alarm, it will activate when the
temperature reaches 130°F. A condenser blower thermostat is standard on this unit. The thermostat
temperature sensor is installed in the refrigerant liquid line. When the ambient temperature is above 95oF the
condenser fan will run at full speed. When the ambient temperature is lower than 95o the condenser fan will
cycle. In applications having frequent voluntary heat load fluctuations, an optional Compressor Short Cycle
Protector is recommended.
When the Kooltronic Air Conditioner is properly sized it should operate constantly and maintain 75oF to
115oF enclosure temperatures, depending on the ambient temperatures.
ENCLOSURE AIR
OUT
CONDENSER AIR
IN (3 PLACES)
ENCLOSURE AIR
IN
CONDENSER AIR
OUT
EP56TR
5

6
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 installation.
CAUTION
1. The unit must sit in an upright position at a minimum room temperature of 65°F to allow the system to
warm-up. This is particularly important during winter months.
2. Refer to the nameplate for proper electrical voltage and current requirements. Connect the power cord
to a properly grounded and fused electrical supply, leaving electrical power to the unit turned off.
3. Remove the rubber plug from the lower panel. The thermostat dial is visible through the hole in the
lower panel. Note the factory thermostat setting which is typically 75oF.
4. Adjust the thermostat to its maximum setting (turn it clockwise).
5. Turn the electrical power on.
6. Verify that the evaporator blower is running.
7. Adjust the thermostat to its minimum setting (turn it counterclockwise). 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.
8. Verify that the condenser fan is running.
9. 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 fans or blowers should be delivering
air through their respective discharge ports. The cool air discharged should be less than 70°F when the
room temperature is between 70°F and 80°F.
10. Turn off the electrical power and disconnect the air conditioner from the power source.
11. Adjust the thermostat back to 70°F. Failure to do this will cause the coil to freeze.
12. Reinstall the rubber plug.
NOTE: Before shipment all Kooltronic Air Conditioners are subjected to a performance test.
The air conditioner must be standing in its proper mounting position for a minimum of
five (5) minutes prior to testing. Failure to follow this procedure will cause permanent
damage to the compressor.

VII. Specific Model Data
Mounting
Kooltronic Air Conditioners have been engineered to be easily installed. To avoid damaging your air
conditioner, please read the following information before installation:
1. Attach two hooks to your enclosure with supplied hardware (see mounting drawing).
2. Route the power cord through the bottom cutout in your enclosure. It is recommend that a lift truck be
used to mount the air conditioner. Hang the air conditioner on the hooks. Before the lift truck lowers the
air conditioner make sure that the hooks are located inside of the small cutouts on the front panel.
3. Tighten the air conditioner bottom flange to your enclosure with supplied hardware (see mounting
drawing).
4. If the mounting panel of your enclosure is not stiff enough (moment inertia is less than 0.005"4) it is
recommended that the three additional supplied screws be used at approximately the middle of the unit
height for proper gasket compression. The screws must be started from inside your enclosure.
5. Attach the supplied drain hose to the drain tubing on the bottom of the air conditioner using the plastic
clamp.
CAUTION
7
If the air conditioner is mounted to the cabinet door you must be sure that the door
hinges will support the additional weight of the air conditioner. Also be certain that
when the door is opened fully, the cabinet does not become unbalanced. The actual
weight of the unit can be found in the Technical Data on page 9.
Dimensions, inches [metric], are for reference only and are subject to change.
CONDENSER AIR INLET
(Ambient Air In, 3 Sides)
CONDENSER OUTLET
(Warm Ambient Air Out)
WARM AIR RETURN
FROM ENCLOSURE
COOL AIR OUTLET
TO ENCLOSURE
EP56B
EP56T 24.11
[612.4]
24.45
[621.0]
4
3
THERMOSTAT
ADJUSTMENT
ACCESS
POWER
CORD
DRAIN
4
3
2
1
EP56B
EP56T
4
3
2
1
1
1
EP56T = Top Evaporator Air Discharge
EP56B = Bottom Evaporator Air Discharge
56.54
[1436.1]
3.05
[77.4]
17.18
[436.4]
(6) .375 [9.5]
DIA. HOLES
0.62
[15.9]
TYP.
0.50
[12.7]
TYP.
10.29
[261.3]
6.44
[163.7]
11.38
[289.1]
7.37
[187.2]
17.75
[450.8]
18.57
[471.7]
53.75
[1365.3]
4.56
[115.8]
1.78
[45.3]
33.21
[843.6]
0.80
[20.3]
0.95
[24.1] 7.46
[189.4]
TYP.
20.25
[514.3]
1.45
[36.7]
10.41
[264.5]
EP56B
EP56T
3
4
EP56T
EP56B
3
4
(3) .375 [9.5]
DIA.OPTIONAL
MOUNTING
HOLES
(4) .375 [9.5]
DIA. HOLES
EP56T = To
EP56B = B
MOUNTING PLAN
EP56 SERIES

8
24.16
[613.6]
56.54
[1436.0]
24.11
[612.5]
THERMOSTAT ACCESS
HOOK (SEE NOTE)
NOTE: HOOKS ARE SHOWN MOUNTED ON CUSTOMER ENCLOSURE
24.45
[621.0]
POWER CORD
11
2
EP56B
EP56T
3
4
EP56T
EP56B
3
4
57.04
[1448.7]
DRAIN
Drawings and Dimensions
EP56 SERIES
Dimensions, inches [metric], are for reference only and are subject to change.
FILTERED CONDENSER
AIR INLET (Ambient Air In)
CONDENSER OUTLET
(Warm Ambient Air Out)
WARM AIR RETURN FROM
ENCLOSURE
COOL AIR OUTLET
TO ENCLOSURE
1
2
3
4

9
Standard Features
Available in either top or bottom evaporator
air discharge models
Baked Powder Finish
Closed-Loop Cooling
Condenser Blower Speed Controller
Crankcase Compressor Heater
Heavy-duty Steel Shell
Low Temperature Control Thermostat
NEMA 3R, 12 &1 Ratings Maintained (UL50)
Tamper-resistant hardware
UL Recognized
Zero ODP Refrigerant
Accessories and Options
Enclosure Heater
Internal Corrosion Protection
Lead-Lag Controller
Remote Thermostat Relay
Special materials or finishes
Temperature Alarm
Technical Data
Model
BTU/H
Rating
95/95
Rating
BTU/H
Ambient
Temp. ºF
Max./Min. Volts Hz
Cooling
Amps
Heating
Amps
Approx.
Weight
(lbs)
K2A3C30EP56TR
K2A3C30EP56BR
K2A6C30EP56TR
K2A6C30EP56BR
30000
30000
30000/24000
30000/24000
26000
26000
28000/22000
28000/22000
131/0
131/0
131/0
131/0
230
230
230
230
60
60
60/50
60/50
26.0
26.0
25.5/25.2
25.5/25.2
15.3
15.3
15.3
15.3
302
304
302
304
Major Component Replacements
K2A3C30EP56_R* K2A6C30EP56_R
Part Part Number Part Number
Compressor 0665-57 0665-402
Compressor Capacitor 0452-54 0452-78
Condenser Blower Motor 0261-274 0261-274
Condenser Blower Capacitor 0452-04 0452-04
Evaporator Blower Motor 0261-275 0261-275
Evaporator Coil 0667-51 0667-51
Condenser Coil 0666-45-1 0666-59-01
*NOTE: Part Numbers shown are for 60Hz/1Ø. For 50Hz consult Kooltronic.

VIII. Maintenance
Kooltronic Air-Cooled Air Conditioners require no maintainance. In the event of a problem with your air
conditioner, please follow the instructions below.
A. Blowers
The design life of the blowers used in all Kooltronic Air Conditioners is substantially in excess of
20,000 hours. All Kooltronic condenser and evaporator blowers are equipped with automatic-reset
thermal overload protectors.
CAUTION
If field replacement of a blower motor is necessary, most blower assemblies, including the mounting
plate, are readily removable. Each of the blower mounting plates is held to the air conditioner cabinet
structure by screws and nuts. For installation of the replacement blower, electrical connections may
be broken at the terminal block, or power leads may be cut and appropriately spliced together.
B. Compressor
All Kooltronic compressors are approved by UL and CSA, and require no maintenance. They are
hermetically sealed and charged at the factory, and equipped with automatic-reset thermal overload
protectors.
If the compressor fails, it is strongly recommended that the air conditioner be returned to Kooltronic
for service.
C. Refrigerant Loss
Kooltronic Air Conditioners are subjected to a series of tests to detect refrigerant leaks, during and
after manufacture. It is possible that shipping or other damage, or microscopic leaks over a long
period, may result in the need for replenishment of refrigerant charge. When it has been verified by
a Certified EPA Technician that a refrigerant shortage does exist, the leak must be repaired.
Then the unit may be evacuated and recharged in the field by a Certified EPA Technician only.
CAUTION
D. Relocation
If your Kooltronic Air Conditioner has to be moved to another location by truck, the following
precautions should be taken:
■De-mount the air conditioner from the equipment, controller or enclosure.
■Conform to the applicable provisions of PROCEDURE FOR PROPER PACKING AND
SHIPMENT OF KOOLTRONIC AIR CONDITIONERS in this manual under Section III.
"PRODUCT HANDLING".
Before opening the air conditioner, disconnect all power.
Refer to the data on the unit name plate which specifies the type of
refrigerant and the amount of charge in ounces.
10