Table of Contents
Troubleshooting
Related Manuals for United CoolAir AlphaAire Series
Summary of Contents for United CoolAir AlphaAire Series
- Page 1 AlphaAire - Gen VI Installation Operation and Maintenance Manual Effective February 2025 Dedicated Outdoor Air System, Air-Source, Heat Pump with Energy Recovery Horizontal and Vertical Units Refrigerant R-454B...
-
Page 2: Table Of Contents
Installation, Operation and Maintenance Manual AlphaAire Gen VI Table of Contents Safety Introduction and Labeling Guide ......3 BACnet Point List ............. 23 Product Compliance Statements ........3 System Options ..............24 R-454B Refrigerant Information .......... 4 Buck Boost Transformer ........... 24 Labeling on Units .............. -
Page 3: Safety Introduction And Labeling Guide
For detailed information regarding specifications, dimensional drawings, and weight information, contact DANGER your local United CoolAir representative. The danger icon indicates presence of a hazard condition that may result in equipment damage, serious bodily injury, or death. -
Page 4: R-454B Refrigerant Information
Installation, Operation and Maintenance Manual AlphaAire Gen VI R-454B Refrigerant Information IMPORTANT This equipment is supplied with R-454B, which is a low global warming potential, A2L refrigerant. All A2L This equipment must be installed in a refrigerants are considered “mildly flammable”, and extra location that is not accessible to the precaution is required during installation and service. - Page 5 Installation, Operation and Maintenance Manual AlphaAire Gen VI WARNING WARNING Leak detection system installed; continuous air circulation required for 1. Flammable refrigerant used. to be proper functioning. Units must be powered repaired only by trained service personnel. except for service. do not puncture refrigerant tubing.
- Page 6 Installation, Operation and Maintenance Manual AlphaAire Gen VI WARNING IMPORTANT / IMPORTANTE Système de détection de fuites installé, ONLY USE OILS APPROVED FOR THE circulation d’air continue nécessaire au bon COMPRESSOR. fonctionnement. L’unité doit être alimentée sauf pour l’entretien. CHECK MANUFACTURER’S Cet appareil est équipé...
-
Page 7: Labeling On Units
Installation, Operation and Maintenance Manual VariCool EZ-Fit Labeling on Units Units may contain any of the following pictograms for safety and awareness. When you see any of these pictograms and their meanings as your safety is important. Unit Label Description Refrigerant Safety Group A2L Read this technical manual for installation/servicing instructions. -
Page 8: Electrical Diagram
Installation, Operation and Maintenance Manual AlphaAire Gen VI Electrical Diagram To retrieve the unit electrical diagram, scan the electrical diagram QR Code label affixed near the unit data tag. This will link to the https://www.unitedcoolair.com website. Scroll down to the Search By Serial Number box and enter the unit serial number. -
Page 9: Handling
Installation Location United CoolAir has run tested this equipment at the factory and has taken photographs post testing for Installation in Unventilated or Under verification and reference in case of any damage incurred during transportation, handling or rigging. -
Page 10: Mounting And Placement
Filters must be provided on all air inlet Typically, the horizontal cabinets are suspended from the streams. United CoolAir recommends a MERV 8 or better unit structure. When installing the unit on hanging rods filter to be utilized. Dependent upon the air quality there (field supplied), use minimum 1/2"... -
Page 11: Indoor Air Quality
Installation, Operation and Maintenance Manual AlphaAire Gen VI Air inlet velocities should be below 500 FPM to reduce the The duct design must be based on accepted industry chance of water or snow penetration ASHRAE Standard practices. These can be found in SMACNA’s HVAC Duct 62.1-2016, Section 5.5.2 provides guidelines for rain Construction Standards –... -
Page 12: Louver And Ducting
Installation, Operation and Maintenance Manual AlphaAire Gen VI The bottom of the intake louver should be raised a minimum of 12” from a horizontal surface (roof, sidewalk, etc.) to prevent blockage from debris. If snow accumulations are expected to be greater than 12”, raise the bottom of the louver above the average snowfall depth. -
Page 13: Louver Selection
Installation, Operation and Maintenance Manual VariCool EZ-Fit Louver Selection Louvers should be inspected and cleaned on a regular Carefully choosing the right intake/exhaust louvers and basis A bird screen is required to deter animals and determining the best location for them are critical debris from entering the duct system components to a successful installation. -
Page 14: Installation
Installation, Operation and Maintenance Manual VariCool EZ-Fit Installation INFORMATION Supply and Return Duct Panel The condensate line out of the unit The horizontal Alpha Aire DOAS supply and return paths (horizontal cabinets only) must be can be configured on the right or left side of the unit. The trapped before going... -
Page 15: Wiring
Installation, Operation and Maintenance Manual AlphaAire Gen VI CAUTION ELECTRICAL HAZARD Control Voltage primary tap MUST be Conduit acceptable adjusted to match field power supply grounding source. A separate ground Control transformer is factory wired for conductor must be connected from 208V (RED) Earth Ground to the factory supplied grounding lug internal to the unit. -
Page 16: Emergency Shutdown
Installation, Operation and Maintenance Manual AlphaAire Gen VI Figure 7 – Auxiliary Drain Pan Switch Figure 6 – Remote Start/Stop High Pressure Switch Emergency Shutdown This switch shuts down the compressor in the event of (Field Supplied / Field Installed) excessive high-pressure (625 psig). - Page 17 Installation, Operation and Maintenance Manual AlphaAire Gen VI minutes. The enthalpy wheel and exhaust blower will continue to run. The defrost timers can be adjusted in the System Settings menu. When defrost cycle is complete, the unit resumes normal operation. Any field installed sensors are required to be installed prior to startup of the unit.
-
Page 18: Unit Controls And Operation
Installation, Operation and Maintenance Manual AlphaAire Gen VI Unit Controls and Operation BMS On/Off System must be enabled through the BMS. Default is ON Unit Controller position to accommodate units without BMS control. System Status The system status can be accessed through the Main Menu option labeled System Status or by holding the left button to return to previous pages. -
Page 19: Blower Control
Installation, Operation and Maintenance Manual AlphaAire Gen VI in heat pump mode, the unit will enter the Defrost Mode. The supply blower and compressor will de-energize for 10 minutes. The enthalpy wheel and exhaust blower will continue to run. The defrost timers can be adjusted in the System Settings sub-menu. -
Page 20: System Sensors
Installation, Operation and Maintenance Manual AlphaAire Gen VI System Sensors Control Temperature Password Protection This sensor is located inside the supply air leaving the enthalpy wheel. It is used to stage the compressor for The controller provides two levels of password protection. both cooling and heating modes. -
Page 21: Advanced Menu Structure
Installation, Operation and Maintenance Manual AlphaAire Gen VI Emergency Shutdown Advanced Menu Structure Terminal blocks (TB-ES) are provided for emergency shut down that will stop all unit functions on open contact. The The Advanced Menu is password protected by the service terminal blocks can be closed with a jumper if the function level password. -
Page 22: Bacnet Communications Setup
Installation, Operation and Maintenance Manual AlphaAire Gen VI For BACnet IP, the Ethernet port is CN20, located on the top of the controller. Software After communication established, building management system can monitor sensor readings, unit status, and start and stop the unit. If building management requires control of set points, the option must be enabled in the BMS Setup section of the software. -
Page 23: Bacnet Point List
Installation, Operation and Maintenance Manual VariCool EZ-Fit ALPHA AIRE BACnet POINTS LIST – Gen. IV Binary Values Index Type Variable Name Description Access Inactive Active UnitOn Turn unit off/on by BMS SupplyFan_On Status - Supply blower on by Modbus ExhaustFan_On Status - Exhaust blower on by Modbus Compressor_On Status - Compressor relay output energized... -
Page 24: System Options
Buck Boost Transformer Small single-phase transformer designed to reduce (buck) or raise (boost) line voltage from 5 to 20%. Used with United CoolAir units where 277 volts need to be reduced to 230 volts. Painted Cabinet (Exterior Only) A Polyurethane Enamel electrostatically sprayed on heavy duty G90 steel components. -
Page 25: Refrigerant Circuit Components
Installation, Operation and Maintenance Manual VariCool EZ-Fit Refrigerant Circuit Components Sight Glass A liquid sight glass is located in the liquid line between the outlet of the liquid receiver and the inlet of the thermostatic expansion valve. Flashing (bubbles) will appear in the sight glass during the first minute or two of operation until the expansion valve fully adjusts. -
Page 26: R-454B Guidelines
Installation, Operation and Maintenance Manual AlphaAire Gen VI R-454B Guidelines DANGER WARNING – A2L Refrigerant LOCKOUT/TAGOUT all power sources This unit contains R-454B which is a class prior to servicing this appliance. This A2L refrigerant that is Flammable. This appliance is provided with a Refrigerant unit should only be installed, serviced, Leak Detection system and components repaired, and disposed of by qualified... -
Page 27: Minimum Room Area
Installation, Operation and Maintenance Manual VariCool EZ-Fit Minimum Room Area At least 50% of the minimum opening area shall be • below 200mm from the floor. Since this unit contains R-454B an A2L Refrigerant, the Openings are permanent openings which cannot be •... - Page 28 Installation, Operation and Maintenance Manual AlphaAire Gen VI NOTE: Reference the refrigerant charge per the largest refrigerant circuit from the unit data tag. TAmin TAmin TAmin TAmin (lbs) (ft^2) (kg) (m^2) (lbs) (ft^2) mc (kg) (m^2) 73.6 66.0 791.7 132.0 12.3 857.7 79.7...
- Page 29 Installation, Operation and Maintenance Manual VariCool EZ-Fit Required Minimum Room Area (m²) y = 13.514x + 2E-13 10.0 12.0 14.0 16.0 18.0 Refrigerant Charge per Circuit From Dataplate (kg) Figure – 10 Refrigerant charge (kg) vs. required conditioned space area (m Required Minimum Room Area (ft²) y = 65.979x 2400...
-
Page 30: Minimum Installation Requirements
Installation, Operation and Maintenance Manual VariCool EZ-Fit Minimum Installation Requirements which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area Minimum Installation Height around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. -
Page 31: Repairs To Sealed Components
Installation, Operation and Maintenance Manual AlphaAire Gen VI NOTE: The use of silicon sealant can inhibit the operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so effectiveness of some types of leak detection all parties are advised. -
Page 32: Removal And Evacuation
Installation, Operation and Maintenance Manual AlphaAire Gen VI Removal and evacuation • Cylinders shall be kept in an appropriate position according to the instructions. When breaking into the refrigerant circuit to make repairs • Ensure that the refrigerating system is earthed –... -
Page 33: Labeling
Installation, Operation and Maintenance Manual AlphaAire Gen VI Do not exceed the maximum working pressure of refrigerants in recovery units and especially not in the cylinder, even temporarily. cylinders. When the cylinders have been filled correctly and If compressors or compressor oils are to be removed, the process completed, make sure that the ensure that they have been evacuated to an acceptable cylinders and the equipment are removed from... -
Page 34: Refrigerant Detection System (Rds)
A2L sensors are added to sections with refrigerant piping, coils, and compressors. Sections with coils may have All United CoolAir HVAC products with an A2L sensors installed on one side the coil (typically the side Refrigerant, and exceeding a charge limit, must have a... -
Page 35: Mitigation Strategy
Installation, Operation and Maintenance Manual AlphaAire Gen VI 6. Once the Mitigation Strategy is complete the unit shall revert to the off state except the blower will run if it is Mitigation Strategy set to continuous mode. The mitigation strategy has been designed and tested in coordination with a testing laboratory so that the A2L Sensor has been strategically placed inside of the product A2L Alarm and Reset... -
Page 36: Maintenance Procedures
Installation, Operation and Maintenance Manual VariCool EZ-Fit Maintenance Procedures To keep the unit operating safely and efficiently, it is recommended that a qualified service technician check the entire system at least once a year. Check the system WARNING more frequently depending on use and surrounding conditions. -
Page 37: Evaporator And Condenser Coils
Installation, Operation and Maintenance Manual AlphaAire Gen VI Rinse all the coils thoroughly after any coil cleaning. Use INFORMATION a suitable fin comb after the coil cleaning to straighten any After installation and during equipment bent fins. startup, the sight glass may appear Pink or Purple. -
Page 38: Model H Heat Exchanger Information
Installation, Operation and Maintenance Manual VariCool EZ-Fit Model H Installation & Maintenance for Alpha Aire Units NORTH AMERICAN ADDRESS AND DISCLAIMER, COPYRIGHT NOTICE, AND CONTACT DATA DECLARATION OF INCORPORTATION Mailing Address: Heatex INC. This is information is available upon request from Heatex P.O. - Page 39 Installation, Operation and Maintenance Manual AlphaAire Gen VI Allowed Pressure Difference MS-hybrid polymer, MS-hybrid polymer, Type: 1-component. 2-component The following maximum allowed pressure differences apply Colors: Grey Grey to H300 heat exchanger is 700 Pa (2.8” WC). The listed Contains Fungicide pressure difference is the maximum values the heat Consistency Paste, thixotropic...
- Page 40 Installation, Operation and Maintenance Manual AlphaAire Gen VI Substance Formula Aluminum MS Polymer Substance Formula Aluminum MS Polymer Acetic Acid COOH Lube Oils Acetone Mercury Ammonium Milk Hydroxide Mineral Thinner Ammonium Sulfate Molasses Bakery Vapors Nitric Acid Beer Oils & Fats Benzene Oleic Acid CHCH(CH...
-
Page 41: Maintenance And Cleaning
Installation, Operation and Maintenance Manual AlphaAire Gen VI 4. Handling Instructions for Plate Heat 5. Maintenance And Cleaning Exchangers 5.1. General 4.1. Lifting All Heatex plate heat exchangers have been designed to prevent dirt from coming into contact with the heat transfer Heat exchangers from Heatex are designed for an optimal surfaces. - Page 42 Installation, Operation and Maintenance Manual AlphaAire Gen VI Figure 13 – Dawn / YES / Fairy Detergent 3. Clean the heat exchanger plates by spraying water into the area between the plates. 4. Vary the spray angle between + 30 and - 30 degrees from the openings at a distance of 300 mm (11”) from the entrance.
- Page 43 Installation, Operation and Maintenance Manual AlphaAire Gen VI 6. Disposal 5.4. Disinfection Heatex recommends undiluted 45% Isopropyl Alcohol for Plate heat exchangers can consist of up to 98 % disinfection. First, spray the heat exchanger with aluminum. disinfectant 45% Concentration Isopropyl Alcohol and 6.1.
-
Page 44: Model E Erw Information
Installation, Operation and Maintenance Manual AlphaAire Gen VI Model E Installation & Maintenance for Alpha Aire Units NORTH AMERICAN ADDRESS AND DISCLAIMER, COPYRIGHT NOTICE, AND CONTACT DATA DECLARATION OF INCORPORTATION Mailing Address: Heatex INC. This is information is available upon request from Heatex P.O. - Page 45 Installation, Operation and Maintenance Manual AlphaAire Gen VI 2. Transport CAUTION Always transport the exchanger vertically. • Heat exchanger may fall over if not • Lift the exchanger in the upper two corner distance secured. pipes according to Figure 15. Please observe that there may be sharp edges and a risk for cuts so we recommend that gloves should be used when the heat exchanger is handled.
-
Page 46: Application Limits
Installation, Operation and Maintenance Manual AlphaAire Gen VI Maximum and recommended pressure drop as well as 1. For only a small amount of easily removable dirt, differential pressure for rotary heat exchanger: Heatex recommends to use a vacuum cleaner. • Pressure drop max 300 Pa (1.2”... - Page 47 Installation, Operation and Maintenance Manual AlphaAire Gen VI 7. Make sure the connected ducts do not press on the 5. Let the heat exchanger air-dry. casing making it squeeze against the wheel. Make 6. Spray the heat exchanger with detergent with a low- sure the diagonal measures of the casing side where pressure sprayer.
- Page 48 Installation, Operation and Maintenance Manual AlphaAire Gen VI For questions or information regarding this product, please Products from Heatex do not contain minerals known as communicate your order number and product code along conflict minerals. with your message. As rotary heat exchangers contain a lot of thin cut metal, Heatex is available for support during office hours: 8am–...
-
Page 49: Troubleshooting
Installation, Operation and Maintenance Manual AlphaAire Gen VI Troubleshooting Guide Turn OFF power to unit before conducting any troubleshooting, unless the tests ELECTRICAL you are performing require system operation. Keep hands, clothing and tools clear HAZARD of electrical terminals. Make sure to keep hands and clothing clear of any moving belts, blowers and WARNING motors while performing any tests. - Page 50 Installation, Operation and Maintenance Manual AlphaAire Gen VI Ensure TXV Bulb tight on piping and located Expansion valve stuck open correct position. Worn or scarred compressor bearings. Check subcooling and superheat. Noisy Compressor Excessive head pressure. Replace compressor. Broken compressor valves. Reduce Head Pressure.
-
Page 51: Important Notice
United CoolAir, LLC. Failure to conform to such specifications and/or instructions shall void this 9. Damages resulting from: (I) freezing of condensate;... -
Page 52: To Obtain Warranty Service
United CoolAir does not assume or authorize any other local distribution network. person to assume for United CoolAir, any other liability for the sale of this product. Model: _________________________ Serial Number: _______________________ Date of Installation: ____________... -
Page 53: Start-Up Procedures
Installation, Operation and Maintenance Manual AlphaAire Gen VI Start-Up Procedures (R-454B Systems) 10. Verify that the filters are in place, clean and usable. ELECTRICAL HAZARD 11. Apply power to the unit. Switch the circuit breaker or field supplied electrical service disconnect Turn OFF power and lockout service switch to the on position. - Page 54 Installation, Operation and Maintenance Manual AlphaAire Gen VI b. Make sure Compressor Current (amps) is below 22. Using an appropriate pressure / temperature chart the RLA Amps listed on the unit data tag. for R-454B refrigerant, look up and record the saturation temperature corresponding to the liquid i.
-
Page 55: Start-Up Form
Installation, Operation and Maintenance Manual AlphaAire Gen VI Alpha Aire Startup Form Please complete the form including contact, start-up date and all request information. Provide a copy to the customer and local distributor. Job Name: Date: Address: City: State: Zip: Unit Model Number: Unit Serial Number: Screw Lugs &... - Page 56 Installation, Operation and Maintenance Manual AlphaAire Gen VI Alpha Aire Startup Form Continued Saturation Temperature °F Suction Superheat ° Discharge Pressure psig Liquid Line Temperature °F Saturation Temperature °F Liquid Subcooling ° Electrical Supply Blower Motor Current amps amps Exhaust Blower Motor Current amps amps Compressor Motor Current...
-
Page 57: R-454B Pressure / Temperature Chart
Installation, Operation and Maintenance Manual AlphaAire Gen VI R-454B Refrigerant Pressure Temperature Chart (Imperial) °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG 70.3 122.3 195.5 295.1 427.4 71.9 124.6 198.7 299.4 433.0 73.5 127.0 201.9 303.7 438.7 75.2 129.3 205.2 308.0... - Page 58 Installation, Operation and Maintenance Manual AlphaAire Gen VI R-454B Refrigerant Pressure Temperature Chart (Metric) °C PSIG °C PSIG °C PSIG °C PSIG °C PSIG -6.7 484.7 843.2 23.3 1347.9 38.3 2034.6 53.3 2946.8 -6.1 495.7 859.1 23.9 1370.0 38.9 2064.3 53.9 2985.4 -5.6...
-
Page 59: Product Nomenclature
Installation, Operation and Maintenance Manual AlphaAire Gen VI Product Nomenclature EXAMPLE: “AA” = Alpha Aire “H”, or ‘V” “H” = Horizontal “V” = Vertical “100” Series “G1”, Common to all 220 volt Single Phase “AS” = Single Circuit “T” = Traditional “A”... -
Page 60: Maintenance Log
This log must be kept with the unit. It is the responsibility of the owner and/or maintenance/service contractor to document any service, repair or adjustments. United CoolAir Service and Warranty Departments are available to advise and provide phone help for proper operation and replacement parts. The responsibility for proper startup, maintenance and servicing of the equipment falls to the owner and qualified licensed HVAC technician. - Page 61 Installation, Operation and Maintenance Manual AlphaAire Gen VI NOTES: Subject to change without notice.
-
Page 62: Appendix
Appendix Subject to change without notice. -
Page 63: Electrical Diagram
Subject to change without notice. - Page 64 UCA.IOM.AA_GenVI Date: 02/14/25 Revision – A UCA PN: 9CAIOMAAGVI...
Need help?
Do you have a question about the AlphaAire Series and is the answer not in the manual?
Questions and answers