Kooltronic KA4C1.0MML 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
900-036-00
Find additional information on
this model at kooltronic.com or
use the Technical Documents
QR code below.
Technical
Documents
MICRO-MINI
SUPER-MINI
NARROW-MINI

2
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
VIII. Maintenance 11 - 12
IX. Trouble Shooting 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 electronic
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.

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.
These Air Conditioner are 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.
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
oFinal Assembly Number
aManufacturing Order Number
sFilter Part Number
dUnderwriters Laboratories Inc. Listed or Recognized Marks and NEMA ratings
We recommend you copy this information from your unit.
qwoa When ordering parts, specify the Model Number, Serial Number, Final Assy. 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
SERVICE AIR FILTER REGULARLY
FILTER P/N
COMPARTMENT ONLY
NEMA/EEMAC/UL50 BY UNDERWRITERS LABORATORIES, INC.
TYPE 1 SPECIAL PURPOSE AIR CONDITIONER EQUIPMENT
TYPE 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.
FINAL ASSY. NO. 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
eeee rr
ty
qw
uu i
d
a
s
o

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
components.
Closed-Loop cooling seals the electrical 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 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.
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 applications having frequent voluntary heat load fluctuations, an
optional Compressor Short Cycle Protector is recommended.
V. Principles of Operation

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. Allow the unit to sit in a upright position at a room temperature of 65°F minimum, allowing the
system to warm-up. This is particularly important in winter months.
2. Refer to the nameplate 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 the thermostat to its maximum setting.
5. If the 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 six (6) minutes from the time
the power is applied to the unit.
9. Verify that the condenser blower or fan is running. Note that 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 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 and 80°F.
11. On units equipped with heaters, adjust both the cooling and heating thermostats to their maximum
settings. Verify that the compressor and condenser fan or blower has stopped. Verify elevated
discharge air temperature from the evaporator air discharge.
12. If the unit is equipped with an on-off switch, leave it in the on position. Return the cooling
thermostat to its original setting. If the unit is equipped with a heater, return the heating thermostat
to its original position.
13. Turn off the electrical power source, and disconnect the air conditioner from the power source.
14. If any cover plug is removed to adjust the unit, make certain to put it back in place to maintain the
integrity of the closed-loop airflow system.
NOTE: Before shipment all Kooltronic, Inc. 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.

7
VII. Specific Model Data
Kooltronic Air Conditioners have been engineered to be installed easily. To avoid damaging your air
conditioner, please read the following information before installation.
Mounting: Micro-Mini and Super-Mini
•Panel-mounted air conditioners are equipped with two vertical mounting rails. These rails can be
mounted to any available vertical surface on the enclosure.
•Refer to 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.
•All externally-mounted air conditioners are 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.
•High strength mounting screws are recommended.
•Attach the brass drain pan fitting and drain hose supplied to the drain exit on the bottom or lower
side panel of the air conditioner.
•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.
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 on page 9.
Mounting: Narrow-Mini
1. See Page 8 for proper Mounting Template and Assembly Bracket (M/TAB) orientation. Place
M/TAB against the outside of the cabinet to locate cutouts and mounting holes. Make sure the
cutouts don’t interfere with components inside your cabinet.
2. Make the necessary cutouts and mounting holes in the cabinet. NOTE: Cutouts must not be less
than M/TAB openings.
3. Mount M/TAB to the outside of the cabinet using at least 6 sets of the mounting hardware supplied
by Kooltronic (eight 1/4-20 press studs, nuts and washers). Preferred position: top, bottom and near
the center on each side. NOTE: Make sure the press studs are unserted with heads toward you.
Tighten nuts securely.
4. To facilitate easy mounting, the four screws located on each side of the unit (side with the power
cord) should be backed out enough to allow the M/TAB slot to fit.
5. Route the power cord through the 2" dia. hole. Line up the four screws on each side of the unit with
the slots on the M/TAB. Slide the unit inside the M/TAB.
6. Make sure there is a tight fit between the unit and M/TAB, before tightening the (8) 10-32
self-tapping screws. NOTE: Do not overtighten these screws.
7. Attach the drain hose supplied to the drain exit in the bottom or the lower side panel. This hose
must not be elevated above the exit port. Improper mounting will impede the flow of condensate
and may cause internal malfunctions.
CAUTION

1
C
L
1.50 DIA.
POWER
CORD
HOLE
7.50
[190.5]
3.50
[88.9]
3.50
[88.9]
3.50
[88.9]
1.68
[42.6]
1.00
[25.4]
(10) .312 DIA. HOLES
6.87
[174.4]
.81
[20.5]
10.25
[260.3]
8.00
[203.2]
7.81
[198.3]
1.82
[46.2]
1.18
[29.9]
6.50
[165.1]
5.25
[133.3]
6.16
[156.4]
8.50
[215.9]
20.00
[508.0]
FILTER
➂
➀
➃
➁
10.00
[254.0]
20.00
[508.0]
10.00
[254.0]
10.25
[260.3]
POWER
CORD
M/TAB
DRAIN
(6) #10-32 WELD NUTS
THERMOSTAT
ADJUSTMENT
ACCESS
➂
➃
(6) .312 DIA. HOLES
15.31
[388.8]
14.81
[376.1]
.25
[6.3]
2.75
[69.8]
2.75
[69.8]
2.18
[55.3]
6.56
[166.6]
15.87
[403.0]
6.06
[153.9]
3.81
[96.7] 1.06
[26.9]
.75
[19.0]
6.00
[152.4]
TYP.
2.00
[50.8]
➀
➂
➃➁
14.31
[363.4]
15.87
[403.0]
15.93
[404.6] 10.62
[269.7]
POWER
CORD
FILTER
DRAIN
THERMOSTAT
ADJUSTMENT
ACCESS
➂
➃
1
➂
➃
4.00
[101.6]
1.50
[38.1]
8.00
[203.2]
4.50
[114.3]
1.00
[25.4]
1.00
[25.4]
4.50
[114.3]
4.31
[109.4]
2.75
[69.8]
.81
[20.5]
12.87
[326.8]
4.43
[112.5]
4.87
[123.6]
.25
[6.3]
14.12
[358.6]
13.62
[345.9]
(4)
.312 DIA.
HOLES
1.50 DIA.
POWER
CORD HOLE
➀
➁
➂
➃
13.25
[336.5]
12.87
[326.8]
6.25
[158.7]
14.12
[358.6]
THERMOSTAT
ADJUSTMENT
ACCESS
POWER
CORD
DRAIN FILTER
Drawings and Dimensions
Narrow-Mini
Micro-Mini
Dimensions (inches) are for reference only and are subject to change.
Super-Mini
MOUNTING PLANS
Micro-Mini
Super-Mini
Narrow-Mini
8
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
Micro-Mini Series
KA4C1.0MML 1000 125/50 115/100 60/50 4.5 43
KA4C1.0MML56 1000 125/50 115M50/60* 4.5 43
K2A4C1.0MML 1000 125/50 230/200 60/50 2.3 43
K2A4C1.0MML5 1000 120/50 230 50 2.3 43
KA4C1.2MML 1200 125/50 115/100 60/50 4.5 43
KA4C1.2MML56 1200 125/50 115M50/60* 4.5 43
K2A4C1.2MML 1200 125/50 230/200 60/50 2.3 43
K2A4C1.2MML5 1200 120/50 230 50 2.3 43
KA4C1.4MML 1400 125/50 115/100 60/50 4.5 43
KA4C1.4MML56 1400 125/50 115M50/60* 4.5 43
K2A4C1.4MML 1400 125/50 230/200 60/50 2.3 43
Super-Mini Series
KA4C1.0SML 1000 115/50 115/100 60/50 7.1 58
KA4C1.0SML56 1000 115/50 115M50/60* 7.1 58
K2A4C1.0SML 1000 115/50 230/200 60/50 3.5 58
K2A4C1.0SML5 1000 115/50 230 50 3.2 58
KA4C1.2SML 1200 115/50 115/100 60/50 7.1 58
KA4C1.2SML56 1200 115/50 115M50/60* 7.1 58
K2A4C1.2SML 1200 115/50 230/200 60/50 3.5 58
K2A4C1.2SML5 1200 115/50 230 50 3.2 58
K2A4C1.4SML 1400 115/50 230/200 60/50 3.5 58
KA4C1.5SML 1500 115/50 115/100 60/50 7.1 58
KA4C1.5SML56 1500 115/50 115M50/60* 7.1 58
K2A4C1.5SML 1500 115/50 230/200 60/50 3.5 58
K2A4C1.5SML5 1500 115/50 230 50 3.2 58
KA4C1.8SML 1800 115/50 115/100 60/50 7.1 58
KA4C1.8SML56 1800 115/50 115M50/60* 7.1 58
K2A4C1.8SML 1800 115/50 230/200 60/50 3.5 58
K2A4C1.8SML5 1800 115/50 230 50 3.2 58
KA4C2.0SML 2000 115/50 115/100 60/50 7.1 58
KA4C2.0SML56 2000 115/50 115M50/60* 7.1 58
K2A4C2.0SML 2000 115/50 230/200 60/50 3.5 58
K2A4C2.0SML5 2000 115/50 230 50 3.2 58
Narrow-Mini Series
KA4C1.0NML 1000 125/50 115/100 60/50 7.1 53
KA4C1.0NML56 1000 125/50 115M50/60* 7.1 53
K2A4C1.0NML 1000 125/50 230/200 60/50 3.6 53
K2A4C1.0NML5 1000 120/50 230 50 3.1 53
KA4C1.5NML 1500 125/50 115/100 60/50 7.1 53
KA4C1.5NML56 1500 125/50 115M50/60* 7.1 53
K2A4C1.5NML 1500 125/50 230/200 60/50 3.6 53
K2A4C1.5NML5 1500 120/50 230 50 3.1 53
KA4C2.0NML 2000 120/50 115/100 60/50 7.1 53
KA4C2.0NML56 2000 120/50 115M50/60* 7.1 53
K2A4C2.0NML 2000 125/50 230/200 60/50 3.6 53
K2A4C2.0NML5 2000 120/50 230 50 3.1 53
KA4C2.5NML 2500 120/50 115/100 60/50 7.1 53
KA4C2.5NML56 2500 120/50 115M50/60* 7.1 53
K2A4C2.5NML 2500 125/50 230/200 60/50 3.6 53
K2A4C2.5NML5 2500 120/50 230 50 3.1 53
Technical Data
MThe transformer required to reduce 115 volt supply to 100 volts for 50 Hz compressor
operation is externally mounted. Consult KOOLTRONIC for resulting dimensional changes.
* Switchable. Switch is internally-mounted for security.
** Rating shown is for operation at maximum ambient temperature.
"115V, 60 Hz and 230V, 60 Hz models also perform at full capacity when operated
at 100V, 50 Hz or 200V, 50 Hz respectively. No transformer is required.
** Ambient ** Approx.
BTU/H Temp. °F Running Weight
Model Rating Max./Min. Volts Hz Amps (lbs.)
Units in BOLD are current standard products. Other units are prior product offerings and shown for reference only.

10
Technical Data (con’t)
Major Component Replacements
Micro-Mini Super-Mini Narrow-Mini
Part Part Number Part Number Part Number
Compressor 0665-100 0665-102 0665-102
Condenser Blower Motor 0265-03 0261-08 0265-03
Condenser Blower Motor Capacitor N/A 0452-03 N/A
Condenser Blower Assembly N/A 7090-00-17 N/A
Evaporator Blower Motor 0265-01 N/A 0265-03
Filter 900F 650F 8751F
NOTE: Part Numbers shown are for 115V 60 Hz. For 230V 60Hz and all 50 Hz consult Kooltronic.