Kooltronic KNA4C1P32R 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
INTEGRITY SERIES
KNA4C_P32R
900-039-23
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 - 6
VI. Pre-Installation Testing 6
VII. Specific Model Data 7 - 9
Mounting
Drawings and Dimensions
Technical Data
Major Component Replacements
Standard Features
VIII. Maintenance 10 - 11
IX. Trouble Shooting 12
X. Warranty 13
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

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 Conditioners 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.
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
OUTDOOR USE
COMPARTMENT ONLY
NEMA/EEMAC/UL50 BY UNDERWRITERS LABORATORIES, INC.
TYPE 3R SPECIAL PURPOSE AIR CONDITIONER EQUIPMENT
TYPE 4/4X INTERFACE TO THE ELECTRICAL ENCLOSURE ONLY
NEMA/EEMAC/UL50 BY UNDERWRITERS LABORATORIES, INC.
SPECIAL PURPOSE AIR CONDITIONER
MAX.
FUSE SIZE
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
FILTER P/N
SERVICE AIR FILTER REGULARLY
ee ee 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
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

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 an 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 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 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 your unit is equipped with an on-off switch, leave it in the on position. Return the cooling thermostat
to its original setting. If 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 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
Mounting
Kooltronic Special Purpose Air Conditioners KNA4C_P32 have been engineered to be
installed easily. These units use fully gasketed flanges to insure a seal between the air
conditioner and the cabinet. This seal is necessary to maintain the integrity of the closed loop
system as well as the NEMA 4 rating.
Prior to mounting, refer to page 8 for general arrangement drawings showing dimensions and
locations of mounting holes and cutouts. Prior to cutting or drilling, make sure that cutouts
and mounting holes do not interfere with components inside of the cabinet. To avoid
damaging your Air Conditioner, please read the following information before installation.
1. Remove and discard (2) nuts and washers holding the Mounting Template and
Assembly Bracket (M/TAB) to the Air Conditioner. Remove M/TAB.
2. See page 8 for proper orientation. Place the M/TAB flush against the outside of the
cabinet to locate cutouts and M/TAB mounting holes. The minimum distance
between lower end of the M/TAB to the ground is 11” for all P32 units.
3. The cutout for warm air return does not have to match the full 8” x 111/2” opening on
the M/TAB. You can locate your cutout anywhere within this opening, making the
return air cutout from the cabinet as large as possible. Make the cold air supply cutout
the same size as on the M/TAB.
4. Mount the M/TAB to the outside of the cabinet using all the 1/4-20 x 1/2” bolts,
washers and nuts supplied by Kooltronic.
5. Route the power cord through the return air cutout of the cabinet. Mount the air conditioner
on the M/TAB by sliding the (4) mounting studs, installed on the air conditioner side
panels, into the (4) inclined slots of the M/TAB.
6. Carefully mark all mounting holes from the flanges of the air conditioner to the cabinet
wall. All holes in the air conditioner flange must be used to maintain the NEMA 4 rating.
7. Remove the air conditioner from the M/TAB and drill .218” dia. mounting holes in the
cabinet. Do not attempt to drill mounting holes in the enclosure without first removing
the air conditioner. Drilling through the sealing gasket may damage it and remove the
NEMA 4 rating.
8. Repeat actions, described in item “5” above.
9. Insert the stainless steel screws with seal washers supplied through holes in the
mounting flanges and the cabinet wall. Install washers and nuts on each screw from
inside of the cabinet and hand tighten. Tighten all nuts to a torque of 20 in.-lbs. going
in a clockwise rotation starting from the top left corner. Retighten to a final torque of
34-40 in.-lbs. in the same rotation as previously used. The torque should be
rechecked after the gasket has been allowed to set for 1 hr. and again after the air
conditioner has been run for 24 hrs. Check the flange gasket compression, after
tightening all nuts - the gasket should be compressed by approximately 1/2 the
gasket thickness (1/8”).
10. After making sure that the source voltage and frequency are the same as shown on
the unit nameplate, connect the air conditioner’s power cord to the power supply.
CAUTION
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 performance specifications.

8
POWER
CORD
M/TAB
DRAIN*
THERMOSTAT
ADJUSTMENT
FILTER
13
311/2
131/8
UNIT
OUTLINE
11/44 TYP.
(24)
.250 DIA.
HOLES
141/2
311/2321/4
3/8
3/8
133/4
13/8
41/4TYP.
101/2TYP.
(6)
.312 DIA.
HOLES
8
8
23/16
31/8
211/16
M/TAB
OUTLINE
111/2
TYP.
51/8
13 TYP.
11/2
➀
➂
➃
➂
➁
➃
➂
➂
➂
➂
➃
WARM AIR RETURN
FROM ENCLOSURE
(Enclosure opening should be located as
high as possible within this area, and equal
or exceed size of cool air outlets.)
FILTERED
CONDENSER AIR INLET
(Ambient Air In)
CONDENSER OUTLET
(Warm Ambient Air Out)
COOL AIR OUTLET
TO ENCLOSURE
➂
321/4
141/2
4
2
41/16
31/2313/16
Drawings and Dimensions
INTEGRITY SERIES
KNA4C_P32R
* Other drain outlets are available - consult KOOLTRONIC.
Dimensions (inches) are for reference only and are subject to change.
Technical Data
KNA4C1P32R 1000 125/0 115/100 60/50 13.0/12.0 105
KNA4C1P32R56 1000 125/0 115 50/60* 13.0 105
K2NA4CP32R 1000 120/0 230/200 60/50 6.0 105
K2NA4C1P32R5 1000 125/0 230 50 6.5 105
KNA4C2P32R 2000 125/0 115/100 60/50 13.0/12.0 105
KNA4C2P32R56 2000 125/0 115 50/60* 13.0 105
K2NA4C2P32R 2000 120/0 230/200 60/50 6.0 105
K2NA4C2P32R5 2000 125/0 230 50 6.5 105
KNA4C3P32R 3000 125/0 115/100 60/50 13.0/12.0 105
KNA4C3P32R56 3000 125/0 115 50/60* 13.0 105
K2NA4C3P32R 3000 120/0 230/200 60/50 6.0 105
K2NA4C3P32R5 3000 125/0 230 50 6.5 105
KNA4C4P32L 4000 125/0 115/100 60/50 13.0/12.0 105
KNA4C4P32L56 4000 125/0 115 50/60* 13.0 105
K2NA4C4P32L 4000 120/0 230/200 60/50 6.0 105
K2NA4C4P32L5 4000 125/0 230 50 6.5 105
** Ambient ** Approximate
BTU/H Temp. °F Running Weight
Model Rating Max./Min. Volts Hz Amps (lbs.)
"
* 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.
"
Units in BOLD are current standard products. Other units are prior product offerings and shown for reference only.

9
Major Component Replacements
KNA4C_P32R K2NA4C_P32R K2NA4C_P32R5
Part Part Number Part Number Part Number
Compressor 0665-101 0665-107 0665-110
Compressor Capacitor N/A 0452-51 0452-51
Condenser Blower Motor 0261-102 0261-84 0261-84
Condenser Blower Motor Capacitor 0452-05 0452-05 0452-05
Condenser Blower Assembly 5940-01-02 5940-02-02 5940-02-02
Evaporator Blower Motor 0261-120 0261-121 0261-121
Evaporator Blower Motor Capacitor 0452-03 0452-03 0452-03
Evaporator Blower Assembly 604532-00-25 604532-00-55 604532-00-55
Filter (1 each) 650F & 8751F 650F & 8751F 650F & 8751F
Standard Features
CFC-Free Refrigerant
Internal Corrosion Protection
Low Temperature Control Thermostat
M/TAB Mounting System (modified)
NEMA 4/4X Rating Maintained (UL50)
Stainless Steel (304-2B) Cabinet
UL/CUL Recognized
Filter Removal and Service
All NEMA 4 Air Conditioners are equipped with bottom filters. P32 Series units are equipped with
an additional rear filter.
1. To replace the bottom filter simply push the filter toward the front using the rear filter
attached tab. Push the filter toward the front and downward until the rear part of the filter
clears the rear filter retainer.
2. To replace the rear filter in the P32 series lift the filter using both sides of the lower filter
frame with both hands. Push the filter toward you and upward until the bottom of the filter
clears the lower filter retainer.
3. After removal, the filters should be flushed under warm running water with the clean side
up, driving contaminants out the dirty side of the filter. If the accumulated dirt is oily,
washing in a detergent bath is recommended, followed by a warm water rinse as above.
4. The filters may be sprayed with Kooltronic A-16 Filter Recoating Adhesive to trap fine
airborne contaminants, or they may simply be dried and reinstalled as strainer type filters.
Recoating is recommended for best results.
5. Reinstall the bottom filter:
a) keeping the tab at the rear (bottom) slide filter into the front retainer,
b) press filter upward and
c) slide back into rear retainer
6. Reinstall the rear filter:
a) keeping filter at the frame sides slide it in the space between the outer rear/top
cover and internal rear panel from the bottom toward the top,
b) reaching the upper retainer, slide filter into upper retainer,
c) press filter against the unit and
d) slide down into lower retainer
NOTE: Part Numbers shown are for 60Hz/1Ø. For 50Hz consult Kooltronic.

10
VIII. Maintenance
Kooltronic Water-Cooled Air Conditioners require no maintenance. Air-Cooled Air Conditioners are designed
to require only the routine cleaning of air filters to assure unimpeded airflow through the condenser
heat exchanger. It is not possible to recommend specific filter cleaning intervals since the level and the
nature of airborne particulate matter differs widely with each installation. It is generally sufficient to remove
and wash the reusable aluminum mesh air filters when the outer surfaces of these filters appear covered with
a thin layer of dust or lint. Filter recoating adhesive is recommended. Appropriate disposable filters are available
from Kooltronic.
If filter service is neglected or delayed, the air conditioner will not perform at its design capacity. The first
indication of excessively clogged air filters is usually a gradual increase of temperature within the
equipment cabinet. If operation is continued under these conditions, the compressor will be shut off by the
thermal overload device. The compressor will restart when its external temperature drops below the protector
threshold setting and the compressor will continue to cycle on and off. Continued operation under these
conditions will cause damage, shorten compressor life and void the warranty.
A. Filter Removal and Service
Kooltronic Air Conditioners feature an easily removable inlet filter to facilitate necessary cleaning.
CAUTION
1) Lift the filter, using the attached tab, to clear the lower filter retainer. Pull filter toward you and
downward until the top of the filter clears the upper filter retainer.
2) After removal, the filters should be flushed under warm running water with the clean side up,
driving contaminants out of the dirty side of the filter. If the accumulated dirt is oily, washing in a
detergent bath is recommended, followed by a warm water rinse as above.
3) The filters may be sprayed with Kooltronic A-16 Filter Coating Adhesive to trap fine airborne
contaminates, or it may simply be dried and reinstalled. Recoating is recommended for the best
results.
4) Reinstall the filter: (a) keeping the tab at the bottom, slide filter into the upper retainer, (b) press filter
against the unit and (c) slide down into lower retainer
Do not operate the air conditioner for extended periods of time with the filter removed, as
the condenser coil may become clogged with dust or lint from the air entering the face. A
unit with a clogged condenser coil will have the same reaction as one with a clogged filter.
A clean filter is the best protection.