Kooltronic ADVANTAGE RP28 Series User manual

ADVANTAGE
RP28 SERIES
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
900-039-37 (1/19)
(CDR: 20131)
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 - 9
Mounting
Drawings and Dimensions
Technical Data
Major Component Replacements
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

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
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
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
ee e e rr
ty
qw
uu i 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 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. A high head pressure switch is standard on this unit and prevents the evaporator
coil from freezing under low ambient temperature. The crankcase compressor heater allows
the unit to start with an ambient temperature of 0°F. In applications having frequent voluntary
heat load fluctuations, an optional Compressor Short Cycle Protector is recommended.
EVAPORATOR
HEAT EXCHANGER
CONDENSATE
EVAPORATOR TRAY
CONDENSER HEAT
EXCHANGER
CONDENSER OUTLET
(Heated Ambient Air Out)
COMPRESSOR
CONDENSER
AIR INLET
(Ambient Air In)
ACCUMULATOR
REFRIGERANT
FILTER DRIER
HEATED AIR FROM
ENCLOSURE
COOL AIR TO
ENCLOSURE
M/TAB
V. Principles of Operation

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 is 75°F.
4. Heat up sensor bulb in evaporator compartment to 90°F using heat pipe or light bulb.
5. Turn electrical power on.
6. Verify that the evaporator blower or fan is running.
7. 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 power is applied to the unit.
8. Verify that the condenser blower or fan is running. Note, the start of the condenser fan or
blower will be delayed until the system pressures rise.
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 and 80°F.
10. Turn off the electrical power source, and disconnect the air conditioner from the power
source.
11. 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.
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 5" 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 Technical Data on page 9.
7
Dimensions, inches [mm], are for reference only and are subject to change.
9.00
[228.6]
TYP.
1.17
[29.7]
TYP.
10.00
[254.0]
5.00
[127.0]
12.88
[327.2]
1.84
[46.7]
8.00
[203.2]
TYP.
1.70
[43.2]
TYP.
1.78
[45.2]
(8) .281 [7.1]
DIA. HOLES
HEATED AMBIENT
AIR OUT
AMBIENT AIR IN
WARM AIR RETURN
FROM ENCLOSURE
COOL AIR SUPPLY
TO ENCLOSURE
6.50
[165.1] 1
2
FIGURE 1 MOUNTING PLAN
RP28 SERIES
WARM AIR RETURN FROM
ENCLOSURE
COOL AIR OUTLET
TO ENCLOSURE
1
2

27.75
[705.0]
12.35
[313.6]
10.94 [278.0]
10.17
[258.2]
8.64
[219.5]
8.58
[218.0]
1
2
3
4
Drawings and Dimensions
RP28 SERIES
8
Dimensions, inches [mm], are for reference only and are subject to change.
GA00356A - Rev. A
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
Technical Data
RP28 Series
KA4C2RP28R 2000 125 0 100/115 50/60 9.7/9.8 86
K2A4C2RP28R 2000 125 0 200/230 50/60 5.6/5.5 86
KA4C3RP28R 3000 125 0 100/115 50/60 9.7/9.8 86
K2A4C3RP28R 3000 125 0 200/230 50/60 5.6/5.5 86
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
KA4C_RP28R K2A4C_RP28R
Parts Part Number Part Number
Compressor 0665-116 0665-107
Condenser Blower Motor 0261-08 0261-54
Evaporator Blower Motor 0265-03 0265-06
Filter 7006F 7006F
Standard Features
Built-in Condensate Evaporator
CFC-Free Refrigerant
Crankcase Compressor Heater
Digital Temperature Display
Filter
Head Pressure Control Switch
Low Temperature Control Thermostat
NEMA 12 & 3R Ratings Maintained (UL50)
UL/CUL Recognized
NOTE: Part Numbers shown are for 60Hz/1Ø. For 50Hz consult Kooltronic.
Units in BOLD are current standard products. Other units are prior product offerings and are shown for reference only.

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 air flow 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) Loosen the screw on the bottom of the filter holder.
2) Push the filter holder forward and move it down.
3) Remove the filter from the filter holder.
4) 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.
5) 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.
6) Reinstall the filter: Insert the filter inside the filter holder, push the filter holder forward,
move it up into place and replace the screw on the bottom of the filter holder.
Do not operate the Air Conditioner for extended periods of time with the
filter removed. The condenser coil may become clogged with dust or
lint from the air entering the face. A clogged condenser coil is not
readily detected and will give the same reaction as a clogged filter. A
clean filter is the best protection.
10