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OPERATOR'S MANUAL
CAUTION
BEFORE INSTALLING AND
USING THIS AIR CONDITIONER,
IT IS IMPORTANT THAT THIS
MANUAL BE READ AND
UNDERSTOOD THOROUGHLY
900-033-08 (12/21)
(CDR: 20498)
Keep This Manual
With Air Conditioner
AIR CONDITIONER
RACK-MOUNT SERIES
K_A4C5RML
Find additional information on
this model at kooltronic.com or
use the Technical Documents
QR code below.
Technical
Documents
KOOLTRONIC, INC.
30 Pennington-Hopewell Road
Pennington, NJ 08534
FAX: 609 • 466-1114
www.kooltronic.com
609 • 466-3400
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Summary of Contents for Kooltronic KA4C5RML
- Page 1 RACK-MOUNT SERIES K_A4C5RML Find additional information on Keep This Manual this model at kooltronic.com or use the Technical Documents With Air Conditioner QR code below. Technical Documents AIR CONDITIONER OPERATOR'S MANUAL CAUTION KOOLTRONIC, INC. BEFORE INSTALLING AND 30 Pennington-Hopewell Road...
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Page 2: Table Of Contents
Trouble Shooting 15 - 16 Warranty 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. -
Page 3: Incoming Inspection
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. -
Page 4: Product Identification And Nameplate
IV. Product Identification and Nameplate Each Kooltronic Air Conditioner includes an identification nameplate. This nameplate provides: 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... -
Page 5: Principles Of Operation
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. - Page 6 Principles of Operation (con’t) MAX AND MIN TEMPERATURE MEMORIZATION 2) Select the required parameter. Press the SET HOW TO SEE THE MIN TEMPERATURE: key to display its value. 3) Use up or down arrow keys to change its value. 1) Press and release the down arrow key.
- Page 7 Principles of Operation (con’t) RESETTING If it becomes necessary to reset the unit, the factory settings are as follows: RANGE PARAMETER DESCRIPTION VALUE UNIT MINIMUM MAXIMUM Set Point °F Differential °F Fourth probe display Third probe display Evaporator probe display Room probe display Differential for temperature alarm recovery °F...
- Page 8 85°F the condenser fan will cycle. In applications having frequent voluntary heat load fluctuations, an optional Compressor Short Cycle Protector is recommended. 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.
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Page 9: Pre-Installation Testing
13. If any cover plug was removed to adjust the unit, be sure to replace it in order to maintain the integrity of the closed-loop airflow system. NOTE: Before shipment all Kooltronic Air Conditioners are subjected to a performance test. -
Page 10: Specific Model Data
OPTION 4 The standard Kooltronic Rack Mount Air Conditioner evaporator airflow is Option 1. In order to convert Option 1 to any of the other options the two cutout covers installed on the unit bottom have to be removed, and installed on the appropriate cutouts. - Page 11 Drawings and Dimensions...
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Page 12: Technical Data
Approximate BTU/H BTU/H Temp. °F Amps Weight Model Capacity 95°F/95°F Max./Min. Volts 120°F/120°F (lbs.) KA4C5RML 5000 4400 120*/0 115/100 60/50 15/14.5 K2A4C5RML 5000 4150/4030 120*/0 60/50 7.8/6.8 *Maximum ambient temperature is shown for Option 1 evaporator airflow. For Options 2 through 5 the maximum ambient temperature is °... -
Page 13: Maintenance
VIII. Maintenance Kooltronic Air-Cooled Air Conditioners require routine cleaning of the air filters to assure unimpeded airflow 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 clean the aluminum mesh filter when the outer surfaces appear covered with a thin layer of dust, lint or other foreign matter. - Page 14 B. Blowers The design life of the blowers used in all Kooltronic Air Conditioners is substantially in excess of 20,000 hours. All Kooltronic condenser and evaporator blowers are equipped with automatic-reset thermal overload protectors. CAUTION Before opening the air conditioner, disconnect all power.
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Page 15: Trouble Shooting
IX. Trouble-Shooting Each Kooltronic Air Conditioner is engineered for performance and built for reliability. They are designed to require only routine maintenance. If your air conditioner should require warranty service, please contact Kooltronic. If you require service out of warranty, we have compiled a trouble-shooting chart to assist your service personnel. - Page 16 Problem Cause Solution Unit overcooling. Failed Thermostat. Check Thermostat wire connections Evaporator Blower, Condenser Replace Thermostat. Blower and Compressor are running. Failed Relay. Replace Relay. Compressor cycling more than Short circuiting of air Provide baffle in the enclosure separating A/C 10 cycles per hour.
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