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Summary of Contents for Delta-T EL-20C Series
- Page 1 User & Technical Manual EL-20C Series Rev 1.0...
- Page 2 Title: EL-20C Air Conditioner Technical Manual Department: Product Management Objective: To provide important information for maintenance, diagnostics, and advance operations of the DELTA- T EL-20C Series Air Conditioners. Revision History: Date Owner Description of Changes 06-14-22 L. Biru Initial Release Statement of Confidentiality The Manual and other materials contain proprietary information, comprising ISC Inc.'s trade secrets.
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Page 3: Table Of Contents
TABLE OF CONTENTS Overview ..................................4 Inspecting the Equipment............................4 Unpacking the Air Conditioner ........................... 4 Moving the Air Conditioners ............................5 Unit Label ................................... 5 Operation..................................5 Preliminary Testing ..............................6 Mounting the Air Conditioner............................7 Unit Specifications ..............................8 Options .................................. -
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 Conditioners
DELTA-T air conditioners operate as a “closed loop” system with no exposure or introduction of outside air. This ensures that the enclosure is separated from and is not contaminated with ambient air, dirt, chemicals, dust, moisture or foreign matter so that sensitive enclosure components are protected and are kept at your required operational temperature. -
Page 6: Preliminary Testing
The cooling is done using a simple refrigeration cycle. A product of this simple refrigeration cycle is excess humidity that condenses to a liquid. DELTA-T air conditioners are designed using an advanced refrigeration cycle and are equipped with a Condensate Removal System that changes the excess humidity liquid into a vapor which is then vented to the atmosphere. -
Page 7: Mounting The Air Conditioner
Mounting the Air Conditioner Using the template supplied, determine where the air conditioner is to be mounted and assure that all required cuts and holes will not interfere with or damage the enclosure or its contents. Assure that there is a 3” clearance between walls / obstructions and the air conditioner for the condenser supply air and return air flow so that it is not restricted. -
Page 8: Unit Specifications
Unit Speci fications The following table provides electrical and refrigeration specifications for the EL-20C Series Air Conditioners. EL-20C Series Nominal Capacity Rating: 20,000 BTUH Standard Maximum Ambient: 140°F Unit Weight: 230VAC – 170lbs, 480VAC – 247lbs Operatin Inrush Loading SCCR... -
Page 9: Options
Options The EL-20C Series Air Conditioner 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 10 Refer to Advanced Digital Temperature Controller Programming section on page 8 for details on changing these parameters. 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. External Heat Output This option allows you to add an external heater to be located anywhere in your enclosure.
- Page 11 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 12: 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 13 4. To store the new setpoint value, press the SET key again or wait 15 seconds. Note: The set value is stored even when the procedure is exited by waiting for the time-out to expire. HOW TO ACCESS HIDDEN MENU 1……..
- Page 14 Select Display Probe P1 – Enclosure Probed Hidden P1 / P2 Temperature Displayed Menu 2 P2 – Condenser Temperature Auxiliary Setpoint for Dry Contact Hidden 105 / -67 - 302 °F Setpoint *1 / Heater Menu 2 Menu Factor Paramet Operating Function Operation...
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Page 15: Preventative Maintenance
Do not use solvents to clean the programmable thermostat. Wipe with mild soap and water. Condenser and Evaporator Fans DELTA-T air conditioners use high efficiency, long life, sealed ball bearing fans engineered for optimum performance that require no maintenance. Keep fan blades clean for optimal performance. Fans are removable and attached by plug in connections. - Page 16 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.
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Page 17: Field Serviceable Parts
Field Serviceable Part s ISC carefully designs and selects components with the maximum life expectancy. Due to OEM manufacturing tolerances, poor unit maintenance or extreme operating conditions, components may fail before their maximum life expectancy. The table below lists parts that are serviceable in the field by an Air Conditioner Technician. Voltage Part Description ISC Part #... -
Page 18: Safety Information
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 19: Troubleshooting Guide
Troubleshooting G uide 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 Is Unit Verify Power On/Off Unit Will Not meets voltage Connected Switch is on position requirements as... - Page 20 Unit Not Measure Temperature at Is evaporator Cooling Compressor Evaporator & Verify Heat Load Fan on? Requirements. Is unit capacity adequate for internal head load? Possible low refrigerant. Check for faulty evaporator fan Check Is snowflake Is there voltage Setpoint. Is LED lit on to compressor? Setpoint...
- Page 21 Single or Potential bad Flashing Error P1 / P2 Multiple connection. Check Codes combination Codes? green connector flashing? behind controller. Refer to Alarm Signals in Digital Temperature Check Low Pressure Controller Switch Connections and Verify Pressure Programming Section switch is closed. Use meter.
- Page 22 Ensure air tight Is Air Conditioner Check drain, is it seal between air Water overflow sealed against plugged? conditioner and / excessive enclosure properly, enclosure. tightly sealed and door Make sure door closed? is closed. Clean condensate pan and drain; add 1 tbsp Contact Customer Service bleach to upper pan monthly to kill mold...
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Page 23: Physical Dimensions
Physical Dimensions 4421 Tradition Trail ● Plano, Texas 75093 ● 972-964-2700 ● 800-836-7472 URL: www.iscenclosurecooling.com ● Email: iscinfo@iscsales.com 23 | P a g e SP-ENG-211-000-19 Rev 1.0... -
Page 24: Electrical Schematics
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. 4421 Tradition Trail ● Plano, Texas 75093 ● 972-964-2700 ● 800-836-7472 URL: www.iscenclosurecooling.com ●... -
Page 25: Warranty Information
Warranty Information 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. Replacement components have a one year warranty period, except for hermetic system components, which have a 90 day warranty period. The above warranty applies when the equipment is operated under the following conditions: •... -
Page 26: Return Material Authorization (Rma) Procedure
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 27 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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