Kooltronic Advantage RP52 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
ADVANTAGE
RP52 SERIES
900-039-34 (2/19)
(CDR: 20131)
Find additional information on
this model at kooltronic.com or
use the Technical Documents
QR code below.
Technical
Documents

2
TABLE OF CONTENTS
Page
I. Introduction 2
II. Incoming Inspection 3
III. Product Handling 3
IV. Product Identification Label 4
V. Principles of Operation 5 - 6
VI. Pre-Installation Testing 6
VII. Specific Model Data 7 - 10
Mounting
Drawings and Dimensions
Technical Data
Major Component Replacements
Wiring Schematics
VIII. Maintenance 11-12
IX. Trouble Shooting 13
X. 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 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.
All Air Conditioners containing an MM, NM, P, or V as part of the model number are designed to
operate in a vertical position only. All Air Conditioners containing an H, RT or RM 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 ade-
quate 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.
eeee rr
ty
qw
s
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
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
uu i
a
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 electronics 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 and evaporated
in the condensate evaporator tray and released to the ambient air by the condenser blower.
If latent heat exceeds 25% of the total cooling capacity excess condensate is released to
the ambient through the drain tube.
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 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 RP52 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 return air teperature reaches 130°F.
CONDENSER OUTLET
(Heated Ambient Air Out)
CONDENSER HEAT
EXCHANGER
REFRIGERANT
FILTER DRIER
COMPRESSOR
EVAPORATOR
HEAT EXCHANGER
COOL AIR TO
ENCLOSURE
ACCUMULATOR
CONDENSER
AIR INLET
(Ambient Air In)
HEATED AIR FROM
ENCLOSURE
M/TAB
CONDENSATE
EVAPORATOR TRAY
V. Principles of Operation

A high head pressure switch is standard on this unit and prevents the evaporator coil from
freezing under lowambient temperature. The crankcase compressor heater allows the
unit to start with an ambient temperature of 0°F. In applications 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.
IMPORTANT NOTE
When the Kooltronic Air Conditioner is properly sized it should operate constantly and
maintain 75ºF to 115ºF enclosure temperatures, depending on ambient temperatures.
VI. Pre-Installation Testing
Before mounting the air conditioner to the enclosure, test for proper operation. This will
CAUTION
1. Allowthe 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 form power requirements then connect the power cord
to a properly grounded and fused electrical supply. Leave the electrical power off.
3. Elevate the unit approximately 3” above the floor to ensure proper condenser airflow.
Do not block condenser air inlet on bottom of unit.
4. Heat up sensor bulbin evaporator compartment to 90ºF using a lowtemperature heat
gun, or adjust the thermostat to 55ºF to simulate the need for cooling.
5. Turn electrical power on.
6. Verify that the evaporator blower fan is running.
7. The compressor should start. Units equipped with a Short Cycle Protector have a 3-
minute delay from when the power is turned on until the compressor begins to operate.
8. Verify that the condenser blower/fan is running. Note: the start of the condenser blower/
fan will be delayed until the system pressure rises.
9. Operate the air conditioner for approximately ten (10) minutes. During the 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 70ºF when the room temperature is between 70ºF
and 80ºF.
10. Turn off the electrical power source, and disconnect the air conditioner from the power
source.
11. If the thermostat was lowered, adjust the thermostat back to 75ºF. Failure to do this
will result in coil freezing.
NOTE: Before shipment all Kooltronic, Inc. Air Conditioners are subjected to a
performance test.
The Air Conditioner must be standingin its proper mountingposition for a
minimum of five (5) minutes prior to testing. Failure to follow this procedure
will cause permanent damage to the compressor.
The temperature of the returningair to the air conditioner is displayed on the
exterior panel of the unit. This is considered the maximum temperature within
the enclosure and not the temperature of the air supplied to the enclosure.
To access the thermostat, remove grille and upper panel. The thermostat is located in
the upper corner of the unit. All panels need to be re-installed to continue testing.
verify the shipping integrity of the system. Please followthe steps belowprior to installation.
6

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:
1. Loosen two screws on the bottom of the unit.
2. See Figure 1 for proper M/TAB orientation.Place the M/TAB flush against the outside of the
enclosure to locate cutouts and mounting holes.
3. NOTE: The top cutout for the warm air return does not have to match the full 4.87" opening on
the M/TAB.You can locate your cutout anywhere within this opening. Locate your cutout close
to the bottom and not less than 3" high. Make sure the cutouts don't interfere with components
inside your cabinet.
4. Mount the M/TAB to the outside of the cabinet using all the mounting hardware supplied by
Kooltronic (1/4-20 screws/nuts/washers). NOTE: Make sure the screws are inserted with heads
on M/TAB side. Tighten nuts securely.
5. Route the power cord through the top cut out in your cabinet. Mount the unit to the M/TAB by
sliding the slots located on the front panel on the hooks of the M/TAB.
6. Tighten two screws on the bottom of the unit and seal the unit against the enclosure.
7. Attach overflow drain hose supplied to the drain exit in bottom of the unit.
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.
7
Dimensions (inches) are for reference only and are subject to change.
MOUNTING PLAN
1.59
[40.4]
TYP.
(16) .281 [7.1]
DIA. HOLES
HEATED AMBIENT
AIR OUT
AMBIENT AIR IN
WARM AIR RETURN
FROM ENCLOSURE
COOL AIR SUPPLY
TO ENCLOSURE
1.24
[31.5]
4.13
[104.9]
6.69
[169.9]
TYP.
14.00
[355.6]
7.12
[181.0]
34.19
[868.4]
7.75
[196.8]
1.84
[46.7]
14.69
[373.0]
FIGURE 1

19.74
[501.3]
14.01
[356.0]
18.28
[464.2]
15.96
[405.3]
52.56
[1335.0]
POWER CORD
DRAIN
17.18
[436.3]
1.50
[38.1]
15.91
[404.0]
Drawings and Dimensions
RP52 SERIES
8
Dimensions (inches) are for reference only and are subject to change. GA00359A - Rev. A

Technical Data
9
RP52 Series
K2A3C14RP52R 14000 120 0 230/200 60/50 17.5 280
K2A3C16RP52R 16000 120 0 230/200 60/50 17.5 280
K2A3C18RP52R 18000 120 0 230/200 60/50 17.5 280
Ambient Ambient * Approximate
BTU/H Temp. °F Temp. °F Running Weight
Model Rating Max. Min. Volts Hz Amps (lbs.)
* Rating shown is for operation at maximum ambient temperature.
Major Component Replacements
K2A3C_RP52R
Part Part Number
Compressor 0665-50
Compressor Capacitor 0452-54
Condenser Blower Motor 0261-80
Condenser Blower Motor Capacitor 0452-06
Evaporator Blower Motor 0261-54
Evaporator Blower Motor Capacitor 0452-03
Evaporator Blower Assembly 200052-00-59
Condenser Coil 0280-10
Evaporator Coil 0280-10
Filter 11751F
NOTE: Part Numbers shown are for 60Hz/1Ø. For 50Hz consult Kooltronic.
Standard Features
Built-in Condensate Evaporator
Low-ODP Referigerant
EMI/RFI Suppressor
Low Temperature Control Thermostat
M/TAB Mounting System
NEMA 3R Rating
Head Pressure Control Switch
Crankcase Compressor Heater

Wiring Schematic
WE
EVAPORATOR
BLOWER
MOTOR
BK
GN
OPTIONAL
HEATER
TO CUSTOMER
ALARM SYSTEM
TERMINAL
BLOCK
COOLING EFFECT DETECTOR
CAP.
SUPPRESSOR
TRANSFORMER
WITH TEMP.
DISPLAY
CRANKCASE HEATER
HEATER
HEATER
OPTIONAL
SHORT CYCLE
PROTECTOR
THERMAL
CUT OUT T-STAT
SHORT
CYCLE
TIMER
BC
B
R
Y
T-STAT
SET 75°F
RELAY
COIL
PRESSURE
SWITCH N.O.
CAP.
CONDENSER
BLOWER
MOTOR
COMPRESSOR
O/L
RC
S
CAP.
10
WD-431 RP52 SERIES