Kooltronic K2NA4C1DSP17L 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
900-039-107 (05/23)
(CDR: 20498)
Find additional information on this
model at kooltronic.com, or use the
Technical Documents QR code
below.
Technical
Documents
ACCESS SERIES
KNA4C1DSP17L
K2NA4C1DSP17L

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 - 6
VI. Pre-Installation Testing 7
VII. Specific Model Data 7 - 11
Mounting
Drawings and Dimensions
Technical Data
Major Component Replacements
VIII. Maintenance 12 - 13
IX. Trouble Shooting 14
X. Warranty 15
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 available on our website, and are presented on pages 7 through 13.

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.
FILTER P/N
FUSE SIZE
MAX.
HIGHLOW
Oz.REFRIGERANT
MAX.°FMIN.°F
AMBIENT TEMP.COOLING
Air Conditioner
DESIGN PRESSURE P.S.I.G.
MFG. ORDER NO.
COOLING BTU
F.L.A.
PH.FREQ.VOLTS
SERIAL NUMBERMODEL NUMBER
ALL MOTORS ARE THERMALLY PROTECTED
VIOLATES WARRANTY
UNAUTHORIZED SERVICE OR MODIFICATION
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
A
LLOW 5 MIN. BEFORE RESTARTING AFTER SHUTDOWN
KOOLTRONIC, INC. PENNINGTON, NJ
MANUFACTURED BY:
SERVICE AIR FILTER REGULARLY
LISTED 84H7
SPECIAL PURPOSE
AIR CONDITIONER
e e e e r r
ty
q w
u u i
a
s
o

5
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 impeller.
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.
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.
CONTROL ACTION
The evaporator blower operates continuously. The compressor is cycled on and off by the action from the factory preset
programmable thermostat. A pressure switch controls the on/off action of the condenser blower.
The regulation is performed according to the temperature measured by the thermostat probe with a positive differential from the
set point: if the temperature increases and reaches set point plus differential the
compressor is started and then turned off when the temperature reaches the
set point value again.
In case of fault in the thermostat probe the start and stop of the compressor
are timed through preset parameters.
The programmable thermostat is located as shown in the upper right ISO
illustration. WARNING: the programmable device is preprogrammed and set
at the factory. In the event changes are needed the following instructions can
be used.
FRONT PANEL COMMANDS
FRONT PANEL LED INDICATORS
- To display target set point; in programming mode it selects a parameter or confirms an operation.
(UP) - To see the max. stored temperature; in programming mode it browses the parameter codes or increases the displayed value.
(DOWN) - To see the min. stored temperature; in programming mode it browses the parameter codes or decreases the displayed value.
- To switch the instrument off, if onF = oFF.
- Not enabled.
(DEF) - To start a manual defrost.
KEY COMBINATIONS
To lock and unlock the keyboard.
To return to the room temperature display.
To enter programming mode.
EVAPORATOR
AIR OUTLET
EVAPORATOR
AIR INLET
CONDENSER
AIR INLET
CONDENSER
A
IR OUTLET
DSP23L
To Be Updated

6
Principles of Operation (con’t)
MAX AND MIN TEMPERATURE MEMORIZATION
HOW TO SEE THE MIN TEMPERATURE:
1) Press and release the down arrow key.
2) The “Lo” message will be displayed followed
by the minimum temperature recorded.
3) Press the down arrow key again or wait 5 seconds
to restore normal display.
HOW TO SEE THE MAX TEMPERATURE:
1) Press and release the up arrow key.
2) The “Hi” message will be displayed followed
by the maximum temperature recorded.
3) Press the up arrow key again or wait 5 seconds to
restore normal display.
HOW TO RESET THE MAX AND MIN TEMPERATURE
RECORDED:
1) Press the SET key for more than 3 seconds while the
max or min temperature is displayed. (rSt message
will be displayed.)
2) To confirm the operation, the “rSt” message starts
blinking and the normal temperature will be displayed.
MAIN FUNCTIONS
HOW TO SEE THE SETPOINT:
1) Press and immediately release the SET key.
The display will show the set point value.
2) Press and immediately release the SET key, or
wait 5 seconds to display the probe value again.
HOW TO CHANGE THE SETPOINT:
NOTE: The standard set point is 75°.
1) Press the SET key for more than 2 seconds to
change the set point value.
2) The value of the set point will be displayed and
the °C or °F LED starts blinking.
3) To change the set value push the up or down
arrow keys within 10 seconds.
4) To store the new set point value push the SET
key again, or wait 10 seconds.
HOW TO CHANGE A PARAMETER VALUE:
To change a parameter’s value, operate as follows:
1) Enter the Programming mode by pressing the
SET plus down arrow keys for 3 seconds (the
°C or °F LED starts blinking).
2) Select the required parameter. Press the SET
key to display its value.
3) Use up or down arrow keys to change its value.
4) Press SET to store the new value and move to
the following parameter. To exit, press SET and
the up arrow keys or wait 15 seconds without
pressing a key.
NOTE: The set value is stored even when the
procedure is exited by waiting for the time-out
to expire.
HOW TO LOCK THE KEYBOARD:
1) Press and hold the up and down arrow keys
simultaneously for more than 3 seconds.
2) The POF message will be displayed, and the
keyboard will be locked. At this point, it will only
be possible to see the set point or the MAX or
MIN temperature stored.
3) If a key is pressed more than 3 seconds, the
POF message will be displayed.
HOW TO UNLOCK THE KEYBOARD:
1) Press and hold the up and down arrow keys
simultaneously for more than 3 seconds until
the Pon message is displayed.
OPTIONAL MONITORING SYSTEM
TTL SERIAL LINE - FOR OPTIONAL MONITORING
SYSTEMS:
The optional TTL serial line, available through the
HOT KEY connector, allows through the use of
the external TTL/RS485 converter, connection of
this digital converter to a monitoring system that is
ModBUS-RTU compatible (X-WEB500/3000/300).
Connections are provided through an external 2-
position terminal block.

7
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 75°F.
4. Turn electrical power on.
5. Verify that the evaporator blower or fan is running.
6. Observe the temperature on the digital display. The thermostat must be set a minimum of 10°F below this
temperature for the compressor to operate (the factory setting is 75°F). Refer to page 6 for instructions on adjustment
of the thermostat.
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 and 80°F. It is normal for the condenser blower to cycle on/off during this period.
8. Turn off the electrical power source, and disconnect the air conditioner from the power source.
9. 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 Air Conditioners are subjected to a performance test.
VII.
Specific Model Data
Mounting
The Kooltronic Special Purpose Air Conditioners K_A4C1DSP17L have been engineered to be installed easily. The air
conditioner is designed for two mounting options - external and internal.
NOTE: Prior to mounting of Air Conditioner units, refer to Mounting Drawings section of the Kooltronic website:
Access Series K_A4C1DSP17L Mounting Drawings
Prior to cutting or drilling, make sure that cutouts and mounting holes do not interfere with components inside the cabinet. The
Mounting Drawings are also available on the following pages.
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.
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.

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
Drawings and Dimensions - Mounting Options
.56
[14.2]
TYP. 0
11.45
[290.8]
5.59
[141.9]
4.03
[102.3]
21.73
[551.9]
TYP.
7.37
[187.1]
6.21
[157.7]
7.50
[190.5]
22.49
[571.2]
TYP.
.49
[12.4]
TYP.
135° TYP.
(2) PLACES
1.25
[31.7]
.99
[25.1]
TYP.
7.99
[202.9]
TYP.
22.99
[583.9]
TYP.
11.74
[298.1]
TYP.
15.49
[393.4]
TYP.
CUTOUT
NOTE: DASHED LINES INDICATING A/C UNIT BOUNDARIES
SURFACE MOUNT USING FRONT PANEL L-BRACKETS
CUTOUT
3
4
DETAIL B
SCALE 1 : 1.5
DETAIL A
SCALE 1 : 1.5
AB
MOUNT UNIT ON THE OUTSIDE OF ENCLOSURE USING THE
(2) MOUNTING BRACKETS AT THE SHOWN LOCATIONS
ENCLOSURE PANEL
1.69
[42.9]
1.51
[38.3]
(14) PLACES
TYP.
.159 [4.0]
HOLES
1.21
[30.7]
Dimensions, inches [mm], are for reference only and are subject to change.
11.45
[290.8]
7.50
[190.5]
18.00
[457.2]
TYP.
7.38
[187.4]
1.31
[33.3]
TYP.
5.59
[141.9]
4.03
[102.3]
.72
[18.2] .59
[14.9]
5.21
[132.3]
5.70
[144.7]
15.00
[381.0]
TYP.
(2) PLACES
135° TYP.
1.00
[25.4]
TYP.
.88
[22.3]
SURFACE MOUNT USING FRONT PANEL RIVNUTS
CUTOUT
CUTOUT
NOTE: DASHED LINES INDICATING A/C UNIT BOUNDARIES
3
4
MOUNT UNIT ON THE OUTSIDE OF ENCLOSURE USING THE
(4) RIVNUTS ON UNITS (NO BRACKETS REQUIRED)
ENCLOSURE PANEL
(4) PLACES
TYP.
.250 [6.3]
HOLES
15.49
[393.4]
TYP.
.54
[13.7]
TYP.
.159 [4.0]
HOLES
(14) PLACES
TYP.
0
7.67
[194.8]
12.05
[306.0]
21.78
[553.2]
TYP.
.94
[ 23.8]
.99
[25.1]
TYP.
7.33
[186.1]
7.50
[190.5]
.49
[12.4]
TYP.
7.99
[202.9]
TYP.
11.74
[298.1]
TYP.
.13
[3.3]
7.16
[181.8]
22.49
[571.2]
TYP. (2)
22.99
[583.9]
TYP. (2)
FLUSH MOUNT USING REAR PANEL L-BRACKETS
CUTOUT
CUTOUT
NOTE: DASHED LINES INDICATING A/C UNIT BOUNDARIES
1
2
DETAIL C
SCALE 1 : 1.5
DETAIL D
SCALE 1 : 1.5
D
C
MOUNT UNIT ON THE INSIDE OF ENCLOSURE USING THE
(2) MOUNTING BRACKETS AT THE SHOWN LOCATIONS
ENCLOSURE PANEL
1.36
[34.5]
To Be Updated
To Be Updated To Be Updated

9
RIVNUT MOUNT
CONFIGURATION
INSIDE
ENCLOSURE
OUTSIDE
ENCLOSURE
MOUNT AC UTILIZING
FRONT PANEL RIVNUTS
4
3
KNA4C1DSP17L / K2NA4C1DSP17L
Dimensions, inches [mm], are for reference only and are subject to change.
FLUSH MOUNT
CONFIGURATION
INSIDE
ENCLOSURE
OUTSIDE
ENCLOSURE
MOUNT AC UTILIZING
REAR PANEL L-BRACKETS
2
1
INSIDE
ENCLOSURE
OUTSIDE
ENCLOSURE
MOUNT AC UTILIZING
FRONT PANEL RIVNUTS SURFACE MOUNT
CONFIGURATION
4
3
KNA4C1DSP17L / K2NA4C1DSP17L
RECESS MOUNT
CONFIGURATION
INSIDE
ENCLOSURE
OUTSIDE
ENCLOSURE
MOUNT AC UTILIZING
REAR PANEL L-BRACKETS
2
1
KNA4C1DSP17L / K2NA4C1DSP17L
KNA4C1DSP17L / K2NA4C1DSP17L
INSIDE
ENCLOSURE
OUTSIDE
ENCLOSURE
MOUNT AC UTILIZING
FRONT PANEL RIVNUTS RIVNUT-SURFACE MOUNT
CONFIGURATION
4
3
KNA4C1DSP17L / K2NA4CDSP17L
NEMA 3R NEMA 3R
NEMA 3R NEMA 4
NEMA 4
INSIDE
ENCLOSURE
OUTSIDE
ENCLOSURE
MOUNT AC UTILIZING
FRONT PANEL RIVNUTS RIVNUT-SURFACE MOUNT
CONFIGURATION
4
3
KNA4C1DSP17L / K2NA4C1DSP17L
NEMA 4
Drawings and Dimensions - Mounting Options
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
Drawings and Dimensions
22.25 [565.1]
2
1
21.73 [551.9]
CONDENSER AIR INLET
FILTER (OPTION)
R.11 [2.8]
.38 [9.6]
.26 [6.6]
1.37 [34.7]
R.19 [4.7]
11.80 [299.7]
20.75 [527.0]
7.42 [188.4]
1.00 [25.4]
.70 [17.7]
CONDENSER AIR OUTLET
4
3
DRAIN TUBE
23.58 [599.0]
5.00 [126.9]
DIGITAL THERMOSTAT
EVAPORATOR AIR INLET
POWER INLET
HIGH TEMPERATURE ALARM
EVAPORATOR AIR OUTLET
NOTE: FOR MOUNTING PLAN, SEE DRAWING GA201924-2M
Dimensions (inches) are for reference only and are subject to change.
K_A4C1DSP17L
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
To Be Updated