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Summary of Contents for Delta-T EL-20B-236
- Page 1 User & Technical Manual EL-20B Series Rev 1.5...
- Page 2 Title: EL-20B Air Conditioner Technical Manual Department: Engineering Objective: To provide important information for maintenance, diagnostics and advance operations of the DELTA-T EL-20B Series Air Conditioners. Revision History: Date Owner Description of Changes 01-15-13 B. Slotnick Initial Release 04-25-13 B. Slotnick Updated product photo &...
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Page 3: Table Of Contents
TABLE OF CONTENTS Overview Inspecting the Equipment Unpacking the Air Conditioner Moving the Air Conditioner Unit Label Operation Preliminary Testing Mounting the Air Conditioner Unit Specifications Options System Faults Digital Temperature Controller Programming Preventative Maintenance Field Serviceable Parts Safety Information Troubleshooting Guide Physical Dimensions Electrical Schematic... -
Page 4: Overview
Overview Thank you for your purchase of the DELTA-T Special Purpose Air Conditioner. Our air conditioning equipment is carefully designed to cool and dehumidify the air in electronic component enclosures. ISC has designed air conditioners for all types of electronic equipment enclosures providing capacity from 1,000 to 20,000 BTUH. -
Page 5: Moving The Air Conditioner
Moving the Air Conditioners Read this section completely before running or installing your DELTA-T air conditioning equipment. Note: You will need to perform a Preliminary Test before mounting the air conditioner. Refer to the Preliminary Test section in this manual for instructions on how to run this test. You will also need to prepare the enclosure that is to be cooled for mounting in accordance with this manual and the template supplied. -
Page 6: Operation
Operation DELTA-T air conditioners will lower (or increase as necessary) the temperature inside an enclosure to ensure its proper operational temperature. Our air conditioners, when sized properly, will provide cooling or heating automatically controlled by the temperature digital controller. DELTA-T air conditioners operate as a “closed loop” system with no exposure or introduction of outside air. -
Page 7: Mounting The Air Conditioner
The condenser fan is controlled by the refrigerant high heat pressure and will turn on later when the operating pressure builds up. This feature allows low ambient operation and reduces current inrush at initial power on. Run the air conditioner for 15 minutes; during this time the condenser fan will turn on after the condenser coil warms up. -
Page 8: Unit Specifications
Current) Current Current) Rating) (Volts) (Amps) (Amps) (Amps) (Amps) Watts) (ounces) (psi) (dBA) (lbs) 25 Amp Class EL-20B-236 207-253 51.50 13.7 CC, CCMR Time R407f 140 / 397 205/226 Delay * 12 Amp Class EL-20B-486 440-480 24.68 6.56 160K CC, CCMR Time... - Page 9 THIS PAGE IS INTENTIONALLY LEFT BLANK 4421 Tradition Trail ● Plano, Texas 75093 ● 972 -964-2700 ● 800-836-7472 URL: www.iscenclosurecooling.com ● Email: iscinfo@iscsales.com SP-ENG-211-100-11 Rev 1.5 P a g e...
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Page 10: Options
Options The EL-20B Series Air Conditioners may be ordered with the following options. Review the list below for the specifications and functions of the option(s) that apply to your unit. Built-in Heater This unit is configurable to include a Built-in Heater to increase the temperature of your enclosure in lower temperature conditions. - Page 11 Celsius Programming Celsius Programming option allows the user to control the DELTA-T Air Conditioner in SI units. This feature can be programmed into the digital temperature controller at time of manufacturing. This feature is also available as an upgrade to air conditioners already in the field equipped with Gen 2.0 controller via a flash drive key.
- Page 12 Ethernet/IP Controller Output This option provides the ability to communicate with the DELTA-T Air Conditioner controller via the Ethernet/IP protocol. You can monitor and control all settings from a remote location with a PLC.
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Page 13: System Faults
System Faults If any of the critical control parameters exceed limits, the compressor is turned off and an alarm condition is indicated on the front panel. There are three main conditions that can shut the AC compressor down: The condenser high temperature alarm ... - Page 14 HOW TO ACCESS HIDDEN MENU 1…….. Enter the Programming mode by pressing the SET + DOWN arrow keys simultaneously for 3 seconds. The “F” LED starts blinking. Select the required parameter by pressing the UP or DOWN arrow key. Press the SET key to display its value.
- Page 15 Menu Factory Operating Function Operation Parameter Unit Location Default Range Heater or Dry Contact Auxiliary Hidden 1 - 45 °F Differential Menu 2 Hysteresis Maximum Alerts with “HA” when Hidden Temperature maximum temperature has 45 - 302 °F Menu 2 Alarm been exceeded Minimum...
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Page 16: Preventative Maintenance
Loss of Refrigerant DELTA-T air conditioners are meticulously leak and run tested after assembly. If a leak in the system should develop due to shipping damage or mechanical vibration, the leak must be detected, repaired and the refrigerant charge restored to the system by a qualified refrigeration professional. -
Page 17: Field Serviceable Parts
Conditioner has been tested by UL to meet the safety requirements of the UL484 specification. When working with the DELTA-T Air Conditioner always makes sure shroud is installed. Verify proper voltage is applied to unit as specified in the UL label of the Air Conditioner. In the event of a field service repair, power down unit using the power on/off switch and disconnect power from unit. -
Page 18: Troubleshooting Guide
Troubleshooting Guide The following guide provides a flow chart to identify a problem, determine the root cause and identify the action needed to correct an issue. Verify input power meets voltage Unit Will Not Run Is Unit Verify Power On/Off requirements as Connected? Switch is on position... - Page 19 Measure Temperature at Evaporator Is evaporator Is Compressor Unit Not Cooling & Verify Heat Load Requirements. Is Fan on? unit capacity adequate for internal head load? Possible low refrigerant. Check for faulty evaporator fan Check Setpoint. Is Is snowflake Is there voltage to Setpoint LED lit on compressor? Use...
- Page 20 Single or Potential bad P1 / P2 Flashing Error Multiple connection. Check combination Codes Codes? green connector flashing? behind controller. Refer to Alarm Signals in Digital Temperature Controller Check Low Pressure Programming Section Switch Connections and Verify Pressure switch is closed. Use meter.
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Page 21: Physical Dimensions
Ensure air tight Is Air Conditioner sealed seal between air against enclosure Water overflow / Check drain, is it conditioner and properly, tightly sealed excessive plugged? enclosure. Make and door closed? sure door is closed. Clean condensate pan and drain; add 1 tbsp bleach to Contact Customer Service upper pan monthly to kill mold... - Page 22 THIS PAGE IS INTENTIONALLY LEFT BLANK 4421 Tradition Trail ● Plano, Texas 75093 ● 972 -964-2700 ● 800-836-7472 URL: www.iscenclosurecooling.com ● Email: iscinfo@iscsales.com SP-ENG-211-100-11 Rev 1.5 22 | P a g e...
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Page 23: Electrical Schematic
Electrical Schematics System Schematic Digital Controller Schematic Note: Schematics apply to all voltages; optional accessories wiring not provided in this document. If you require electrical schematic with options contact our technical support and provide your model number. Warranty Information 4421 Tradition Trail ● Plano, Texas 75093 ● 972 -964-2700 ● 800-836-7472 URL: www.iscenclosurecooling.com ●... - Page 24 ISC products are warranted to be free of defects in workmanship, materials and components. The warranty period applies from date of shipment for one year. The above warranty applies when the equipment is operated under the following conditions: Ambient temperature not in excess of performance rating in normal atmosphere or as stated on product nameplate ...
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Page 25: Return Material Authorization (Rma) Procedure
Customer will pay all freight charges. Out of Warranty Repair If your DELTA-T air conditioner is out of warranty and requires repair, simply call ISC Customer Service at (800)-836-7472 for an RMA number. Customer Service will help you determine what repairs or parts are needed and, if possible, an estimate of the cost. -
Page 26: Appendix A - Power Terminal Block
Appendix A Wago Power Terminal Block Instructions Scope: Instructions for connecting power wires to air conditioners equipped with a “Wago” power terminal block. 1 - Remove cover from chassis using T25 Torx bit. 2 -The sequence of the connecting the wires is from LEFT TO RIGHT. 3 - Connect each wire as shown by lifting the lever and inserting the wire into the receptacle directly below.
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