Kooltronic Large Horizontal Top-Mounted Series 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
900-039-66 (1/19)
(CDR: 20131)
LARGE HORIZONTAL
TOP-MOUNTED SERIES
K2A6C12HTL
Find additional information on
this model at kooltronic.com or
use the Technical Documents
QR code below.
Technical
Documents

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 - 10
Mounting
Drawings and Dimensions
Technical Data
Major Component Replacements
Standard Features
Accessories and Options
VIII. Maintenance 11 - 12
IX. Trouble Shooting 12 - 13
X. Warranty 14
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 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.
This Air Conditioner is 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
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.
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
aFilter Part Number
sUnderwriters 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.
yUse of incorrect type or amount of refrigerant will adversely affect performance and may damage the unit.
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
COMPARTMENT ONLY
TYPE 1 SPECIAL PURPOSE AIR CONDITIONER EQUIPMENT
NEMA/EEMAC/UL50 BY UNDERWRITERS LABORATORIES, INC.
SERVICE AIR FILTER REGULARLY
FILTER P/N
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
LISTED 84H7
SPECIAL PURPOSE
AIR CONDITIONER
ee ee rr
ty
qw
uu i
as
o

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.
Any enclosure moisture accumulated on the evaporator coil is
collected in the condensate tray and removed through the drain
tube to the condensate evaporator. Condensate evaporates in
the condensate evaporator and is released to the ambient air by the condenser blower.
The heat removed through the evaporator coil is transferred by the compressed refrigerant to the condenser
coil. Ambient air is then passed through the condenser coil, where it absorbs the heat and is then discharged
to the environment.
This unit is equipped with a Low Temperature Thermostat to prevent the evaporator coil from freezing. In
conditions of low ambient temperature and low enclosure load, the thermostat regulates the return air
temperature from 75°F to 86°F. The standard set point of the Low Temperature Thermostat is 75°F. The
set point can be changed to 70°F or to 79°F by changing the location of the thermostat jumper (See
illustrations on page 8).
The Low Temperature Thermostat has a test start relay. When the air conditioner is turned on it will run
constantly for the first 15 minutes regardless of external temperatures. Afterwards, if the entering evaporator
air temperature is lower than the thermostat set point, the compressor and condenser blower will stop, and
the thermostat will begin to control the air conditioner.
The heater kit consists of a heater, a heat control thermostat and a heater limiter. The heater control
thermostat is a bimetal disk with a fixed set point of 60°F. When the entering evaporator air temperature rises
above 60°F the heater shuts off, and when the evaporator air temperature falls below 40°F the heater will
engage. The contact points of the alarm thermostat are normally closed. If the entering evaporator air
temperature exceeds 130°F the alarm thermostat contacts open, and when the temperature drops below
130°F the contacts close.
A condenser blower switch is standard on this unit. When the ambient temperature is above 95°F the
condenser fan will run at full speed. When the ambient temperature is lower than 95°F 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 75°F to
115°F enclosure temperature, depending on the ambient temperatures.
5
AMBIENT
AIR IN
CONDENSER
AIR OUT
SUPPLY
AIR OUT
RETURN
AIR IN
K2A6C12HTL

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. Note the factory thermostat setting which is 75oF.
4. Turn the electrical power on.
5. Verify that the evaporator blower or fan is running.
6. Verify that the condenser blower or fan is running. It will start running after three (3) to five (5) minutes.
7. 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.
8. Turn off the electrical power and disconnect the air conditioner from the power source.
9. If any cover plug was removed to adjust the unit, be sure to replace it in order to maintain the integrity
of the closed-loop airflow system.
NOTE: Before shipment all Kooltronic Air Conditioners are subjected to a performance test.
6
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. To avoid compressor damage do not tip the unit more than 45° from its
proper mounting position.

7
VII. Specific Model Data
Mounting
Kooltronic Air Conditioners have been engineered to be installed easily. To avoid damaging your Air
Conditioner, please read the following information before installation.
•Top-Mounted Air Conditioners for external top installation contain weld-nuts.
•Refer to Mounting Plan on page 8 for the location of all mounting holes and cutouts.
•Make sure the cutouts don't interfere with components inside your cabinet.
•Proper alignment of all air inlets and outlets is essential for optimum performance of the Air
Conditioner.
•Place supplied gasket on perimiter of enclosure cutouts. All externally-mounted Air Conditioners
must be fully gasketed to ensure proper sealing. This seal is necessary to maintain the integrity of
the closed loop system.
•Use all existing mounting holes to insure stability and a tight seal.
•The external drain hose must not be elevated above the exit port. Improper mounting will impede the
flow of condensate and may cause internal malfunctions.
When unmounting the unit from the cabinet, make certain
to keep the unit level, to avoid spilling of any water
that may be in the condensate pan.
CAUTION

8
Drawings and Dimensions
15.88
[403.3]
TYP.
(6) .312 [7.9]
DIA. HOLES
.84
[21.3]
8.62
[218.9]
1.17
[29.7]
12.50
[317.5]
TYP.
3.04
[77.2]
TYP. 1.18
[29.9]
15.20
[386.0]
15.23
[386.8]
11.08
[281.4]
3.20
[81.2]
3.42
[86.8]
.54
[13.7]
1
2
MOUNTING PLAN
Dimensions, inches [mm], are for reference only and are subject to change.
2.06
[52.3]
.17
[4.3]
2.60
[66.0]
2
1
1
24
3J2
345
10 9876
123
J1
CG
RELAY
CONTACTS
N.O.
240 VAC
120 VAC
TEMPERATURE
SENSOR
Mounting Holes (4)
.156 [3.9] DIA.
ADJUSTING
PINS
3
214
70ºF - Connect 1 and 2
75ºF - Connect 1 and 3
79ºF - Connect 1 and 4
Thermostat Jumper
ELECTRONIC THERMOSTAT CONTROL
Electronic Thermostat Control
Dimensions, inches [mm], are for reference only and are subject to change.
WARM AIR RETURN FROM
ENCLOSURE
COOL AIR OUTLET
TO ENCLOSURE
1
2
K2A6C12HTL

9
SWITCH
DRAIN
POWER
CORD
17.56
[446.0]
1.04
[26.4]
16.71
[424.4]
.74
[18.7]
.34
[8.6]
COOLING EFFECT DETECTOR “B” OPTION
11.08
[281.4]
15.20
[386.0]
15.23
[386.8]
.54
[13.7]
1.18
[29.9]
3.20
[81.2]
3.42
[86.8]
1.17
[29.7]
31.08
[789.4] .70
[17.7]
16.15
[410.2]
12.90
[327.6]
3.62
[91.9]
15.83
[402.0]
12.32
[312.9]
.87
[22.0]
1
2
3
4
Drawings and Dimensions (con’t)
K2A6C12HTL
Dimensions, inches [mm], are for reference only and are subject to change. GA20150A
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

10
Technical Data
K2A6C12HTL 12000 11500 125/-20 230 60/50 12.0/12.0 152
K2A6C12HTL 12000 11500 125/-20 208 60 13.4 152
Ambient Running Approximate
BTU/H BTU/H Temp. °F Amps Weight
Model Capacity 95°F/95°F Max./Min. Volts Hz 131°F/131°F (lbs.)
Major Component Replacements
K2A6C12HTL
Part Part Number
Compressor 0665-401
Compressor Run Capacitor 0452-54
Condenser Motor 0261-80
Condenser Motor Capacitor 0452-06
Evaporator Impeller 0194-15
Evaporator Impeller Capacitor 0452-73
Condenser Coil 0280-10
Evaporator Coil 0667-55
Standard Features
Built-in Condensate Evaporator
Condenser Blower Controller
Filter
High Refrigerant Temperature Protection
Low Temperature Control Thermostat
Maintains NEMA 1 Rating (UL50)
UL/CUL Listed
Zero ODP Refrigerant