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Summary of Contents for First Co WCX Series
- Page 1 Installation, Operation, & Maintenance IOM75G03 Rev. A 1/25 WCX Series R454B Condensing Unit ATTENTION Read all instructions thoroughly and retain all manuals for future reference.
- Page 2 WCX IOM COPYRIGHT The Manufacturer works to continually improve its products and as a result, it reserves the right to change design and specifications without notice. WARNING Altering the product or replacing parts with non-authorized factory parts voids all warranty or implied warranty and may result in adverse operational performance and/or a possible hazardous condition to service personnel and occupants.
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Page 3: Table Of Contents
WCX IOM TABLE OF CONTENTS SAFETY CONSIDERATIONS NOMENCLATURE INSTALLATION PRECAUTIONS GENERAL STORING UNITS UNIT LOCATION R454B INFORMATION REFRIGERANT LINE PURGING AND LEAK TESTING EVACUATION CHARGING ELECTRICAL POWER SUPPLY THERMOSTAT WIRING OPERATION & MAINTENANCE 13-17 PRE-START-UP CHECKLIST START-UP AND OPERATION DATA ALTITUDE ADJUSTMENT FACTOR TO CALCULATE MIN. -
Page 4: Safety Considerations
WCX IOM SAFETY CONSIDERATIONS 1. READ THE ENTIRE MANUAL BEFORE STARTING THE INSTALLATION. 2. Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury or damage. 3. Consult a qualified licensed installer, service agency, or your distributor for information assistance. The qualified licensed installer or service agency must use factory-authorized kits or accessories when servicing this product. -
Page 5: Nomenclature
WCX IOM NOMENCLATURE IOM75G03 (Rev. A 1/25) -
Page 6: Installation Precautions
WCX IOM INSTALLATION PRECAUTIONS Installation of this equipment should only be performed flammable vapors are present. Inform all persons on site by properly trained personnel to ensure proper about the risks of the nature of the work underway and installation and the safety of the installer. the necessary safety precautions. -
Page 7: General
WCX IOM GENERAL STORING UNITS WARNING WARNING These instructions are intended to aid qualified, licensed, DO NOT stack more than THREE units when storing. Failure to service personnel in proper installation, adjustment and follow these instructions may result in property damage, operation of this unit. - Page 8 WCX IOM units to minimize recirculation of condenser exhausted UNIT LOCATION CONT. air. For units that are to be installed in the interior of a building or in return air spaces care should be taken to seal any openings in the cabinet that would allow hot condensing unit air into the conditioned space.
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Page 9: R454B Information
WCX IOM R454B INFORMATION WARNING Tools required for installing and servicing R454B units. FIRE, EXPLOSION HAZARD Manifolds sets Failure to following this warning could result in personal injury, Up to 650 psig High Side (45 bar) death and/or property damage. Up to 250 psig Low Side (17 bar) Do not attempt any sealed system repair without first recovering the entire refrigerant charge. -
Page 10: Purging And Leak Testing
WCX IOM PURGING AND LEAK TESTING EVACUATION Since the condensing unit will not have to be evacuated unless it has lost its charge, leave the service valves WARNING closed and recover the refrigerant in the evaporator coil and connecting tubing only. Next connect the vacuum FIRE, EXPLOSION HAZARD pump to the charging port on the gauge manifold, start Failure to following this warning could result in personal injury,... -
Page 11: Charging
WCX IOM CHARGING WCX units are charged with 3.5lbs (1.6kg) of R454B. The WARNING installer must add charge to meet the required subcooling value. For partial system charging, the subcooling and superheat method can be used to make IMPROPER HANDLING OF REFRIGERANTS CAN CAUSE INJURY, small refrigerant charge adjustments. -
Page 12: Electrical Power Supply
WCX IOM ELECTRICAL POWER SUPPLY NOTE IMPORTANT A Compressor Time Delay Relay may be required and will need to be field installed if rapid cycling of the compressor occurs. Electrical work associated with the installation of this appliance must comply with the National Electrical Code (NEC). Other local or regional electrical and building code requirements may apply. -
Page 13: Operation & Maintenance
WCX IOM OPERATION & MAINTENANCE CAUTION WARNING All appropriate personal protection equipment should be worn Disconnect all power to unit before servicing field wires or removing when servicing or maintaining this unit. Personal injury can result control package. Make sure that disconnecting means is within sight from, and is readily accessible from, the unit. -
Page 14: Preventative Maintenance
WCX IOM OPERATION & MAINTENANCE (continued) All possible ignition sources, including cigarette smoking, CAUTION should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during Failure to keep condensing coil clean and free of blockage will which refrigerant can possibly be released to the result in system damage and may cause hazardous conditions. -
Page 15: Detection Of Flammable Refrigerants
WCX IOM OPERATION & MAINTENANCE (continued) chlorine shall be avoided as the chlorine may react with CHECKS TO ELECTRICAL DEVICES AND SEALED the refrigerant and corrode the copper pipe-work. ELECTRICAL COMPONENTS If a leak is suspected, all naked flames shall be Repair and maintenance to electrical components shall removed/extinguished. -
Page 16: Charging Procedures
WCX IOM OPERATION & MAINTENANCE (continued) D. Pump down refrigerant system, if possible. The outlet for the vacuum pump shall not be close to E. If a vacuum is not possible, make a manifold so any potential ignition sources, and ventilation shall be that refrigerant can be removed from various parts available. - Page 17 WCX IOM OPERATION & MAINTENANCE (continued) The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of the flammable refrigerant. If in doubt, the manufacturer should be consulted.
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Page 18: Pre-Start-Up Checklist
WCX IOM PRE-START-UP CHECK LIST Before Start-up, all components should be checked thoroughly. The system should be completely cleaned of all construction dirt and debris. Coils should be cleaned using an industry acceptable cleaning method. Prior to starting the unit: 1. -
Page 19: Altitude Adjustment Factor To Calculate Min. Room Area
WCX IOM ALTITUDE ADJUSTMENT FACTOR TO CALCULATE MIN. ROOM AREA The Indoor equipment requirements are calculated at sea level. For altitudes 800 meters and above adjust the minimum room area specified on or near the Serial Plate by the corresponding altitude adjustment factor shown below. -
Page 20: Notes
WCX IOM NOTES IOM75G03 (Rev. A 1/25) - Page 21 P.O. Box 270969 Dallas, TX 75227 www.firstco.com or www.ae-air.com The manufacturer works to continually improve its products. It reserves the right to change design and specifications without notice. ©2022 First Co., Applied Environmental Air...
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