Table of Contents
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Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Industrial Climate Engineering™ Division of AIRXCEL
The most current version of this manual can be found at www.acice.com.
ECU Installation & Operation Manual
Models ECUA90/120/150/180/240
Description ........................... 5
Installation ......................... 12
Start-Up ............................. 21
Troubleshooting ................. 22
Maintenance ....................... 25
Warranty ............................ 26
Start-Up Checklist .............. 27
P.O. Box 5104 • Cordele, Georgia 31010
2002 Hoover St. • Cordele, Georgia 31015
(229) 273-9558 • Fax (229) 273-5154
E-mail: icesales@airxcel.com • Internet: www.acice.com
Vertical Air Conditioners
Manufactured By:
, Inc.
®
Part Number 02118 04/2015 rev.3
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Table of Contents
Troubleshooting
Summary of Contents for Ice ECUA90
- Page 1 ECU Installation & Operation Manual Vertical Air Conditioners Models ECUA90/120/150/180/240 Chapter 1 Description ......5 Chapter 2 Installation ......12 Chapter 3 Start-Up ......21 Chapter 4 Troubleshooting ....22 Chapter 5 Maintenance ....... 25 Chapter 6 Warranty ......26 Chapter 7 Start-Up Checklist ....
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Page 2: How To Use This Manual
How To Use This Manual This manual is intended to be a guide to Industrial Climate Engineering's line of vertical air conditioners. It contains installation, troubleshooting, maintenance, warranty, and application information. The information contained in this manual is to be used by the installer as a guide only. This manual does not supersede or circumvent any applicable national or local codes. -
Page 3: Table Of Contents
WARNING • If the information in these instructions are not followed exactly, a fire may result causing property damage, personal injury or loss of life. • Read all instructions carefully prior to beginning the installation. Do not begin installation if you do not understand any of the instructions. •... - Page 4 Table of Contents Chapter 5 Maintenance Scheduled Maintenance .........................25 Chapter 6 Warranty Limited Product Warranty ........................26 Chapter 7 Start-Up Check List Start-Up Check List ..........................27 Illustrations Figure 1a. Typical Electrical Schematics for Units with One Compressor ..........10 Figure 1b. Typical Electrical Schematics for Units with Two Compressors ...........
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Page 5: General Description
Chapter 1 Description & Specifications General Description Industrial Climate Engineering's (ICE) Environmental Control Units (ECU) are a series of vertical wall-mounted air conditioning systems that provide heating, cooling, and ventilation for electronic equipment shelters, process control centers, E-Houses, and other applications with high internal heat gains. -
Page 6: Air Flow, Weights And Filter Sizes
Weights and Filter Sizes Complete electrical and performance specifications and dimensional drawings are in the Product Data Sheet. Model Number ECUA90 ECUA120 ECUA150 ECUA180 ECUA240 Cooling BTUH 94,000 125,000 150,000 170,000 235,000 Rated Air Flow (CFM 3,500 4,000 5,000 6,000... -
Page 7: Electronic Control Board Mode Of Operation
Electronic Control Board Mode of Operation Normal 24 VAC power must be continuously applied to “R” and “C”. Upon a call for cooling “Y” and with the high pressure switch (HPS) closed, the compressor will be energized. (Note: See the delay on make feature.) The compressor will remain energized during the 3 minute timed low pressure by-pass cycle. -
Page 8: Optional Controls And Packages
The air conditioners are available in two standard cabinet colors -the standard grey with beige as an option. The standard cabinet’s sides, top and front panels are constructed of 16 gauge painted steel. Contact your ICE representative for color chips, custom colors and 316 stainless steel cabinets. ECU 04/2015 rev.3... -
Page 9: 1.8 Electrical Operation
Fresh Air Damper Allows introduction of outside air into the building to provide positive pressurization. Field installed on either the left or right hand side of the unit. Dual Compressors With Lead/Lag Operation Freeze Sensor On Indoor Coil Prevents frost on the indoor coil caused by a loss of air flow or restrictive duct work. Field installed. Filter Access From Return Air Grille Factory or field installed filter bracket allows changing and access to the filters from the return air grille. -
Page 10: Figure 1A. Typical Electrical Schematics For Units With One Compressor
Figure 1a. Typical Electrical Schematic for Units with One Compressor ECU 04/2015 rev.3... -
Page 11: Figure 1B. Typical Electrical Schematics For Units With Two Compressors
NOTICE: MODELS 180-240 HAVE TWO INDEPENDENT ELECTRICAL CIRCUITS AND EACH ELECTRICAL CIRCUIT IS WIRED THE SAME AS SHOWN. Figure 1b. Typical Electrical Schematic for Units with Two Compressors ECU 04/2015 rev.3... -
Page 12: Chapter 2 Installation
D) When installing multiple units, please note the recommended clearances noted in Table 4. 4. Airflow Requirements: The maximum static pressure for the ECUA90 is 1.2 IWG (300 Pa) and 1.8 IWG (450 Pa) for the ECUA120 and 150. Keep duct lengths as short as possible. Do not obstruct airflow through the unit. -
Page 13: Installation Materials
MIN. CLEARANCE BETWEEN MIN. SPACE MODEL SIDES (SINGLE UNIT) UNITS (TWO UNITS) ABOVE UNIT ECUA90/120/150/180/240 24 inches (76 cm) 18 inches (46 cm) 24 inches (61 cm) Table 4. Minimum Clearances 6. Codes: Make sure your installation conforms to all applicable electrical, plumbing, building, and municipal codes. - Page 14 Aluminum Return Grille for ECU90/120/150. 42½" x 21½" (1,080 mm x 546 mm) Additional Items Needed: Additional hardware and miscellaneous supplies (not furnished by ICE®) are needed for installation. The list below contains approximate quantities of items typically needed for mounting a unit on a wood frame wall structure.
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Page 15: Porting And Duct Work
The 1" (25.4mm) clearance must extend on all sides of the supply duct for the first 3 feet (1 meter) from the unit. IMPORTANT: ICE™ requires a minimum of 1" (25.4mm) from the surface of any supply ducts to combustible material for the first 3 feet (1 meter) of the duct. -
Page 16: Installing The Lifting Brackets
Figure 2. Top Flange and Lifting Bracket Installation Installing the Lifting Brackets The ECU90/120/150 have lifting brackets that can be installed on the top of the side panels. These brackets allow the unit to be picked up thru lifting eyes in the brackets.The lifting brackets are shipped attached to the back panel of the ECU. -
Page 17: Electrical Connections
For units with electric heat, a one inch clearance is required around the duct extensions. The duct extensions must be constructed of galvanized steel with a minimum thickness of .019” as per the NFPA standards 90A & 90B. Figure 3. Air Conditioner Wall Mount Detail Electrical Connections WARNING ELECTRICAL SHOCK HAZARD... - Page 18 that the suction pressure drops and the discharge pressure rises when the compressor is energized. An alternate method of verification for self contained system with small critical refrigerant charges, where the installation of gauges may be objectionable, can be made by monitoring the temperature of the refrigerant lines at the compressor.
- Page 19 Figure 6a. 3. On dual units, refer to either the ICE CommStat 3 or CommStat 4 Controller Specification sheet. Wire the two air conditioners to the Lead/Lag Controller, according to the wiring diagram on the specification sheet.
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Page 20: Figure 4A. Thermostat Connection Diagram
Figure 4a. Thermostat Connection Diagram Figure 4b. CommStat 3 Wiring Diagram ECU 04/2015 rev.3... -
Page 21: Chapter 3 Start-Up
Chapter 3 Start-Up Check-Out of Cooling Cycle Important: Be sure that the crankcase heater (if used) has been energized for at least 24 hours before starting the unit(s). Double-check all electrical connections before applying power. All air conditioners with scroll compressors running on 3Ø power must be checked for proper rotation during the initial start-up. -
Page 22: Chapter 4 Troubleshooting
Chapter 4 Troubleshooting Overview The middle front panel provides access to the electrical/control box and to the filters. This panel has hinges on the left and right hand side. This panel should ONLY be opened by using the two hinges on the left side OR the two hinges on the right side. - Page 23 PROBLEM/SYMPTOM LIKELY CAUSE(S) CORRECTION B. Unit runs for long periods or continu- 1. Dirty filter or reduced airflow 1. Check air filter(s). Check blower operation. Remove ously; cooling is insufficient. airflow restriction. 2. Low refrigerant. 2. Check for proper charge and possible refrigerant leak. 3.
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Page 24: Compressor Troubleshooting
Compressor Troubleshooting NOTE: It is important to rule out other component failures before condemning the compressor. The following electrical tests will aid diagnosis: 1. Start-Up Voltage: Measure the voltage at the compressor contactor during start-up. The voltage must exceed the minimum shown in Table 5, section 2.2, or compressor failure is likely. A low voltage condition must be corrected. -
Page 25: Chapter 5 Maintenance
Chapter 5 Maintenance The middle front panel provides access to the electrical/control box and to the filters. This panel has hinges on the left and right hand side. This panel should ONLY be opened by using the two hinges on the left side OR the two hinges on the right side. -
Page 26: Chapter 6 Warranty
ICE will honor its warranty and furnish the required replacement part. All costs for shipment and risk of loss during shipment of the product or part to ICE and back to the owner shall be the responsibility and liability of the owner. Upon written request by an owner, ICE may arrange for remote diagnosis of the allegedly defective or malfunctioning product or part but all costs for transportation, lodging and related expenses with regard to such diagnostic services shall be the responsibility and liability of the owner. -
Page 27: Chapter 7 Start-Up Check List
A. Equipment Information Date: ________________Equipment Owner _______________________________________ Installing Company: _____________________________Installer: ____________________ Address: _______________________________________State _______________________ City: __________________________________________ ICE Air conditioner: Model No. _____________________________________________ Serial No. _____________________________________________ Compressor: Model No. _____________________________________________ Serial No. _____________________________________________ Compressor: Model No. - Page 28 Are correct filters in place? ❒Yes ❒No Refrigerant Piping If leaks are found, report any leaks to ICE Warranty Service Dept. C. Check Rated Voltage at Terminal Block for Imbalance before starting of Unit. ❒208/230V 1 Phase ❒208/230V 3 Phase ❒460V 3 Phase...
- Page 29 D. Heating Mode Check & Record Readings Circuit 1 Circuit 2 (if applicable) Room Temperature ________ ________ Outside Temperature ________ ________ Evap. Entering Air DB Temp ________ ________ Evap. Entering Air WB Temp ________ ________ Evap. Leaving Air DB Temp ________ ________ Evap.
- Page 30 After 10 minutes of compressor operation, record the following: Circuit 1 Circuit 2 (if applicable) Room Temperature ________ ________ Outside Temperature ________ ________ Suction Pressure ________ ________ Suction Line Temperature ________ ________ Discharge Pressure ________ ________ Discharge Line Temperature ________ ________ Entering Condenser Air ________...