Event electronic K-NA4C3P21R User Manual

Keep This Manual

With Air Conditioner

INTEGRITY SERIES

K_NA4C3P21R

900-039-42

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

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

Standard Features

Wiring Schematic

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 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 10.

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.

All Air Conditioners containing an M, P, or V as part of the model number are designed to operate
in a vertical position only. All Air Conditioners containing an H 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

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.

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.

PROCEDURE FOR PROPER PACKING AND SHIPMENT OF KOOLTRONIC AIR

5)

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

IV. Product Identification and Labels

Each Kooltronic Air Conditioner includes an identification label. This label provides:

➀
➁
➂
➃
➄
➅
➆
➇

Model Number

Serial Number

Electrical power characteristics
Maximum and minimum ambient operating temperatures
Cooling capacity
Type and amount of refrigerant required for recharging
Design Pressure
Underwriters Laboratories Inc. Listed or Recognized Marks and NEMA ratings

We recommend you copy this information from your unit.

MODEL NO. SERIAL NO.

➀ ➁

VOLTS. FREQ. PH. F.L.A. MIN.

COOLING AMBIENT TEMP.

➂ ➂ ➂ ➂ ➃ ➃

COOLING BTU REFRIGERANT

➄➅

DESIGN PRESSURE P.S.I.G.

LOW HIGH MAX. FUSE SIZE

➆➆

Air Conditioner

o

F MAX oF

➇

➂

ALLOW 5 MIN. BEFORE RESTARTING AFTER SHUTDOWN

UNAUTHORIZED SERVICE OR MODIFICATION VIOLATES WARRANTY

THIS PRODUCT IS PROTECTED BY ONE OR MORE OF THE FOLLOWING
PATENTS: 3,019,965 3,120,166 3,211,360 3,559,728 3,807,493 AND
OTHER PATENTS PENDING

MANUFACTURED BY:

KOOLTRONIC, INC. PENNINGTON, NJ VENTURA, CA

SERVICE AIR FILTERS REGULARLY

ALL MOTORS ARE THERMALLY PROTECTED

➀➁ When ordering parts, specify the Model Number and Serial Number.

➂ Before operating, be sure that the power source matches these requirements.

➃ Make sure that these parameters are met. Failure to do so may result in permanent damage to the unit.

➅ Use of incorrect type or amount of refrigerant will adversely affect performance and may damage the unit.

4

V. Principles of Operation

CONDENSER OUTLET

(Heated Ambient Air Out)

(2 Places)

CONDENSER

HEAT EXCHANGER

COOL AIR

TO ENCLOSURE

HEATED AIR

FROM ENCLOSURE

EVAPORATOR

HEAT EXCHANGER

COMPRESSOR

P21

CONDENSER AIR

INLET

(Ambient Air In)

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

3

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.

2

1

4

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.

Kooltronic Air Conditioners are designed to operate continuously in order to

70ºF - Connect 1 and 2

75ºF - Connect 1 and 3

79ºF - Connect 1 and 4

eliminate compressor cycling, which shortens compressor life and causes line
transients. This unit is also equipped with a Low Temperature Thermostat to
prevent the evaporator coil from freezing. In conditions of low ambient
temperature and low enclosure load, the thermostat regulates the return air
temperature from 75°F to 86°F. The standard set point of the Low Temperature
Thermostat is 75°F. The set point can be changed to 70°F or to 79°F by

Thermostat Jumper

changing the location of the thermostat jumper (See illustration at right).
The Low Temperature Thermostat has a test start relay. When the air conditioner is turned on it will run

constantly for the first 15 minutes regardless of external temperatures. Afterwards, if the entering evaporator
air temperature is lower than the thermostat set point, the compressor and condenser blower will stop, and
the thermostat will begin to control the air conditioner.

5