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

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.

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.

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

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

q w

u u i

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

IR OUTLET

DSP23L

To Be Updated

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.

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.

FILTERED CONDENSER

AIR INLET (Ambient Air In)

CONDENSER OUTLET

(Warm Ambient Air Out)

WARM AIR RETURN FROM

ENCLOSURE

COOL AIR OUTLET

TO ENCLOSURE

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

DETAIL B

SCALE 1 : 1.5

DETAIL A

SCALE 1 : 1.5

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

NOTE: DASHED LINES INDICATING A/C UNIT BOUNDARIES

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.

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

NOTE: DASHED LINES INDICATING A/C UNIT BOUNDARIES

DETAIL C

SCALE 1 : 1.5

DETAIL D

SCALE 1 : 1.5

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

RIVNUT MOUNT

CONFIGURATION

INSIDE

ENCLOSURE

OUTSIDE

ENCLOSURE

MOUNT AC UTILIZING

FRONT PANEL RIVNUTS

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

INSIDE

ENCLOSURE

OUTSIDE

ENCLOSURE

MOUNT AC UTILIZING

FRONT PANEL RIVNUTS SURFACE MOUNT

CONFIGURATION

KNA4C1DSP17L / K2NA4C1DSP17L

RECESS MOUNT

CONFIGURATION

INSIDE

ENCLOSURE

OUTSIDE

ENCLOSURE

MOUNT AC UTILIZING

REAR PANEL L-BRACKETS

KNA4C1DSP17L / K2NA4C1DSP17L

INSIDE

ENCLOSURE

OUTSIDE

ENCLOSURE

MOUNT AC UTILIZING

FRONT PANEL RIVNUTS RIVNUT-SURFACE MOUNT

CONFIGURATION

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

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

Drawings and Dimensions

22.25

[565.1]

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

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

To Be Updated

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