American Standard® | Air Conditioning and Heating| HVAC Systems
Installation Guide for American Standard models including: 4A6V8X24A1000A, 4A6V8X36A1000A, 4A6V8X48A1000A, 4A6V8X60A1000A, 4A7V8X24A1000A, 4A7V8X36A1000A, 4A7V8X48A1000A, 4A7V8X60A1000A, 4A6V8X24A1000A Variable Speed Heat Pumps and Air Conditioners, 4A6V8X24A1000A, Variable Speed Heat Pumps and Air Conditioners, Speed Heat Pumps and Air Conditioners, Heat Pumps and Air Conditioners, Air Conditioners, Conditioners
The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific ...
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DocumentDocumentInstaller's Guide American Standard Link or AccuLinkTM Variable Speed Heat Pumps and Air Conditioners 4A6V8X24A1000A 4A6V8X36A1000A 4A6V8X48A1000A 4A6V8X60A1000A 4A7V8X24A1000A 4A7V8X36A1000A 4A7V8X48A1000A 4A7V8X60A1000A Note: "Graphics in this document are for representation only. Actual TM model may differ in appearance." The Diagnostics Mobile App is available by scanning a QR code Note: This unit can be used in AccuLinkTM mode or American Standard Link mode. located inside this unit or by searching for the Link Diagnostics App in your App Store®. SAFETY WARNING Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment. August 2022 11-BC45D1-1C-EN SAFETY SECTION Important -- This document contains a wiring diagram and service information. This is customer property and is to remain with this unit. Please return to service information pack upon completion of work. WARNING HAZARDOUS VOLTAGE! Failure to follow this Warning could result in property damage, severe personal injury, or death. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. WARNING REFRIGERANT OIL! Any attempt to repair a central air conditioning product may result in property damage, severe personal injury, or death. These units use R-410A refrigerant which operates at 50 to 70% higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant cylinders are painted a "Rose" color to indicate the type of refrigerant and may contain a "dip" tube to allow for charging of liquid refrigerant into the system. All R-410A systems with variable speed compressors use a PVE oil that readily absorbs moisture from the atmosphere. To limit this "hygroscopic" action, the system should remain sealed whenever possible. If a system has been open to the atmosphere for more than 4 hours, the compressor oil must be replaced. Never break a vacuum with air and always change the driers when opening the system for component replacement. CAUTION HOT SURFACE! May cause minor to severe burning. Failure to follow this Caution could result in property damage or personal injury. Do not touch top of compressor. CAUTION CONTAINS REFRIGERANT! Failure to follow proper procedures can result in personal illness or injury or severe equipment damage. System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening system. CAUTION GROUNDING REQUIRED! Failure to inspect or use proper service tools may result in equipment damage or personal injury. Reconnect all grounding devices. All parts of this product that are capable of conducting electrical current are grounded. If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. WARNING SERVICE VALVES! Failure to follow this warning will result in abrupt release of system charge and may result in personal injury and/or property damage. Extreme caution should be exercised when opening the Suction and Liquid Line Service Valve. Turn valve stem counterclockwise only until the stem contacts the rolled edge. No torque is required. WARNING BRAZING REQUIRED -- IF USING MECHANICAL CONNECTIONS, ENSURE LEAK TEST IS NEGATIVE! Failure to inspect lines or use proper service tools may result in equipment damage or personal injury. If using existing refrigerant lines make certain that all joints are brazed, not soldered. WARNING HIGH LEAKAGE CURRENT! Failure to follow this Warning could result in property damage, severe personal injury, or death. Earth connection essential before connecting electrical supply. ©2022 American Standard Heating and Air Conditioning 11-BC45D1-1C-EN WARNING SAFETY SECTION 400 VOLTS ELECTRICAL HAZARD Failure to follow this warning could result in personal injury or death. WAIT TWO (2) MINUTES after disconnecting power prior to touching electrical components as they may hold a dangerous charge of 400VDC, then verify DC Voltage is less than 42 VDC at inverter test points labeled +VDC and -VDC before servicing board. +VDC -VDC +VDC and -VDC Approved Combinations for Variable Speed Units running in American Standard Link mode · UX360 Smart Thermostat · SC360 System Controller · Approved System Accessories · TAMX · S8V2xxxxxxVC Approved Combinations for Variable Speed Units running in AccuLink mode · ACONT850, AZONE950 or AZON1050 · TAM9 · TAM8C · TAM8 · S9V2 Furnace w/Relay Panel · Platinum 95 Furnace · Platinum 80 Furnace · Approved System Accessories Note: See AHRI directory for approved indoor and outdoor model combinations. Only Trane / American Standard coils and air handlers are approved for use with variable speed outdoor unit. Important: Use caution when cleaning outdoor coil to ensure no water enters the electrical control compartment. When cleaning coil from inside the compressor compartment, take special care not to spray water towards the top rows of the coil near the control panel. Water may enter the control compartment and drive damaging the electronics. Disconnect all electric power, including remote disconnects before servicing. Table 1. Operating Range Cooling Heating 55° F to 120° F -10° F to 66° F 11-BC45D1-1C-EN 3 Table of Contents Unit Location Considerations . . . . . . . . . . . . . . . 5 ......................................... 6 Coastal Considerations. . . . . . . . . . . . . . . . . . . . 7 Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Setting Up the Unit . . . . . . . . . . . . . . . . . . . . . . . 8 Refrigerant Line Considerations . . . . . . . . . . . . 9 Refrigerant Line Brazing . . . . . . . . . . . . . . . . . . . 12 Refrigerant Line Leak Check . . . . . . . . . . . . . . . 14 Refrigerant Line and Indoor Coil Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Service Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Electrical Low Voltage Communicating . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Electrical -- High Voltage . . . . . . . . . . . . . . . . . . 19 Integrated Variable Speed Control Board LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 System Charge Adjustment . . . . . . . . . . . . . . . 22 Subcool Charging Correction Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Refrigerant Charging Chart . . . . . . . . . . . . . . . 24 Charging the Unit. . . . . . . . . . . . . . . . . . . . . . . . . . 25 Subcooling Charging Below 55º F Outdoor Temp. (In Heating Only) . . . . . . . . . . 26 Communicating Display Assembly (CANda) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Defrost Control (Heat Pump only). . . . . . . . . . 28 Checkout Procedures . . . . . . . . . . . . . . . . . . . . . . 29 Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4 11-BC45D1-1C-EN Unit Location Considerations Table 2. Unit Dimensions and Weight Models H x D x W (in) 4A6V8X24A 41 x 30 x 33 4A6V8X36A 41 x 30 x 33 4A6V8X48A 41 x 34 x 37 4A6V8X60A 45 x 34 x 37 4A7V8X24A 41 x 30 x 33 4A7V8X36A 41 x 30 x 33 4A7V8X48A 41 x 34 x 37 4A7V8X60A 45 x 34 x 37 * Weight values are estimated (uncrated). Weight * (lb) 195 208 234 250 196 207 245 250 · When mounting the outdoor unit on a roof, be sure the roof will support the unit's weight. · Properly selected isolation is recommended to alleviate sound or vibration transmission to the building structure. Table 3. Refrigerant Line and Service Valve Connection Sizes Model 4A6V8X24A 4A6V8X36A 4A6V8X48A 4A6V8X60A 4A7V8X24A 4A7V8X36A 4A7V8X48A 4A7V8X60A Rated Line Sizes Vapor Line 5/8 (a) 3/4 (a) 7/8 (a) 7/8 (a) 5/8 (a) 3/4 (a) 7/8 (a) 1--1/8 (b) Liquid Line 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 Service Valve Connection Sizes Vapor Line Liquid Line Connection Connection 3/4 3/8 3/4 3/8 7/8 3/8 7/8 3/8 3/4 3/8 3/4 3/8 7/8 3/8 7/8 3/8 W H D Standard Line Set 150' Max Line Length 50' Max Line Lift 100' Max Line Length Refer to (a), (b), and (c) footnotes for specific model details 50 Max Line Lift 100' Max Line Length (a) The max length of refrigerant lines from outdoor to indoor unit MUST NOT exceed 150 feet. The max vertical change MUST NOT exceed 50 feet. (b) The max length of refrigerant lines from outdoor to indoor unit MUST NOT exceed 80 feet. The max vertical change MUST NOT exceed 25 feet. 11-BC45D1-1C-EN 5 Unit Location Considerations Table 4. Alternate Refrigerant Line and Service Valve Connection Sizes Model 4A6V8X24A 4A6V8X36A 4A6V8X48A 4A6V8X60A Alternate Line Sizes Vapor Line 3/4" (a) 5/8" (a) 3/4" (a) 3/4" (a) 7/8" (a) Liquid Line 5/16" 5/16" 3/8" 3/8" 3/8" Service Valve Connection Sizes Vapor Line Connection Liquid Line Connection 3/4" 3/4" 7/8" 7/8" 7/8" 3/8" 3/8" 3/8" 3/8" 3/8" Model 4A7V8X24A Alternate Line Sizes Vapor Line 3/4" (a) Liquid Line 5/16" Service Valve Connection Sizes Vapor Line Connection Liquid Line Connection 3/4" 3/8" 4A7V8X36A 5/8" (a) 5/16" 3/4" 3/8" 4A7V8X48A 3/4" (a) 3/8" 7/8" 3/8" 4A7V8X60A 3/4" (a) 7/8" (a) 3/8" 3/8" 7/8" 7/8" 3/8" 3/8" (a) The max length of refrigerant lines from outdoor to indoor unit MUST NOT exceed 150 feet. The max vertical change MUST NOT exceed 50 feet. Table 5. Suggested Locations for Best Reliability · Ensure the top discharge area is unrestricted for at least 5 feet above the unit. · Provide at least 3 feet clearance in front of the control box (access panels) and any other side requiring service. · Do not locate close to bedrooms as operational sounds may be objectionable. · Avoid locations near windows and similar areas where condensation and freezing defrost vapor can annoy a customer. · Position the outdoor unit a minimum of 12" from any wall or surrounding shrubbery to ensure adequate airflow. · Outdoor unit location must be far enough away from any structure to prevent excess roof runoff water or icicles from falling directly on the unit. Avoid Install Near Bedrooms Min. 12" to Shrubbery Min 5' Unrestricted Min 3' Unrestricted Access Panel · Position the outdoor unit a minimum of 12" from any wall or surrounding shrubbery to ensure adequate airflow. · Outdoor unit location must be far enough away from any structure to prevent excess roof runoff water or icicles from falling directly on the unit. Min. 12" to Shrubbery Min. 12" to Wall 6 11-BC45D1-1C-EN Unit Location Considerations Table 6. Cold Climate Considerations (Heat Pump Only) Note: It is recommended that these precautions be taken for units being installed in areas where snow accumulation and prolonged below-freezing temperatures occur. · Units should be elevated 312 inches above the pad or rooftop, depending on local weather. This additional height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing. Ensure that drain holes in unit base pan are not obstructed, preventing drainage of defrost water. · If possible, avoid locations that are likely to accumulate snow drifts. If not possible, a snow drift barrier should be installed around the unit to prevent a build-up of snow on the sides of the unit. Min. 12" Snow Barrier Snow Legs 3-12" Elevation Pad Coastal Considerations If installed within one mile of salt water, including seacoasts and inland waterways, models without factory supplied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time. 11-BC45D1-1C-EN 7 Unit Preparation 1. Check for damage and report promptly to the carrier any damage found to the unit. 2. To remove the unit from the pallet, remove tabs by cutting with a sharp tool. Setting Up the Unit Table 7. Pad Installation When installing the unit on a support pad, such as a concrete slab, consider the following: · The pad should be at least 1" larger than the unit on all sides. · The pad must be separate from any structure. · The pad must be level. · The pad should be high enough above grade to allow for drainage. · The pad location must comply with National, State, and Local codes. 8 11-BC45D1-1C-EN Refrigerant Line Considerations Table 8. Factory Charge The outdoor condensing units are factory charged with the system charge required for the outdoor condensing unit, ten (10) feet of tested connecting line, and the smallest rated indoor evaporative coil match. Always verify proper system charge via subcooling (TXV/EEV). Table 9. Required Refrigerant Line Length Determine required line length and lift. You will need this to determine the subcooling charging corrections later in the installation process. Total Line Length = ___________________________Ft. Total Vertical Change (lift) = ____________________Ft. Line Length Table 10. Refrigerant Line Insulation Important: The Vapor Line must always be insulated. DO NOT allow the Liquid Line and Vapor Line to come in direct (metal to metal) contact. Liquid Line Note: The gas line must always be insulated. Insulating the liquid line through attic spaces may benefit system performance by minimizing heat gain in the liquid line. Vapor Line Insulation 11-BC45D1-1C-EN 9 Refrigerant Line Considerations Table 11. Reuse Existing Refrigerant Lines CAUTION REFRIGERANT! Failure to inspect or use proper service tools may result in equipment damage or personal injury. If using existing refrigerant lines make certain that all joints are brazed, not soldered. For retrofit applications, where the existing indoor evaporator coil and/or refrigerant lines will be used, the following precautions should be taken. · Ensure that the indoor evaporator coil and refrigerant lines are the correct size. · Ensure that the refrigerant lines are free of leaks, acid, and oil. Important: For more information, see publication number SS- APG006EN Table 12. Refrigerant Line Routing Precautions Important: Comply with National, State, and Local Codes when isolating line sets from joists, rafters, walls, or other structural elements. Important: For buried linesets, see publication number SS-APG006EN. Important: Take precautions to prevent noise within the building structure due to vibration transmission from the refrigerant lines. For Example: · When the refrigerant lines must be fastened to floor joists or other framing in a structure, use isolation type hangers. · Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings. · Where the refrigerant lines run through a wall or sill, they should be insulated and isolated. · Isolate the lines from all duct work. · Minimize the number of 90° turns. Table 13. Isolation From Joist/Rafter 8 Feet Maximum Joist/Rafter Isolator Side View 8 Feet Maximum Line Set Secure Vapor Line from joists using isolators every 8 ft. Secure Liquid Line directly to insulated Vapor Line using tape, wire, or other appropriate method every 8 ft. 10 11-BC45D1-1C-EN Table 14. Isolation In Wall Spaces Refrigerant Line Considerations 8 Feet Maximum Wall Isolator Side View 8 Feet Maximum Line Set Secure Vapor Line from joists using isolators every 8 ft. Secure Liquid Line directly to insulated Vapor Line using tape, wire, or other appropriate method every 8 ft. Table 15. Isolation Through Wall Wall Sealant Insulation Vapor Line Duct Work Isolator Line Set DO NOT hang line sets from duct work 11-BC45D1-1C-EN 11 Refrigerant Line Brazing Table 16. Braze the Refrigerant Lines 1. Remove caps or plugs. Use a deburring tool to debur the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth. 2. Remove the pressure tap cap and valve core from each service valves. 3. Purge the refrigerant lines and indoor coil with dry nitrogen. 12 11-BC45D1-1C-EN Table 16. Braze the Refrigerant Lines (continued) 4. Wrap a wet rag around the valve body to avoid heat damage and continue the dry nitrogen purge. 5. Braze the refrigerant lines to the service valves. a. For Units shipped with a field-installed external drier, check liquid line filter drier's directional flow arrow to confirm correct direction of refrigeration flow (away from outdoor unit and toward evaporator coil) as illustrated. Braze the filter drier to the Liquid Line. 6. Continue the dry nitrogen purge. Do not remove the wet rag until all brazing is completed. Important: Remove the wet rag before stopping the dry nitrogen purge. Note: Precautions should be taken to avoid heat damage to base pan during brazing. It is recommended to keep the flame directly off of the base pan. 7. Replace the pressure tap valve cores after the service valves have cooled. Refrigerant Line Brazing 3-4" from valve 11-BC45D1-1C-EN 13 Refrigerant Line Leak Check Table 17. Check for Leaks 1. Pressurize the refrigerant lines and evaporator coil to 150 PSIG using dry nitrogen. 150 PSIG 2. Check for leaks by using a soapy solution at each brazed location. Note: Remove nitrogen pressure and repair any leaks before continuing. Refrigerant Line and Indoor Coil Evacuation Important: Do not open the service valves until the refrigerant lines and indoor coil leak check and evacuation are complete. 1. Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump. 0350 Microns ON OFF 2. Observe the micron gauge. Evacuation is complete if the micron gauge does not rise above 500 microns in one (1) minute. 3. When evacuation is complete, blank off the vacuum pump and micron gauge, and close the valves on the manifold gauge set. 1 MIN. 14 11-BC45D1-1C-EN Service Valves Table 18. Open the Gas Service Valve Important: Leak check and evacuation must be completed before opening the service valves. Note: Do not vent refrigerant gases into the atmosphere. Cap 1. Remove valve stem cap. 2. Using a wrench, turn valve stem 1/4 turn counterclockwise to the fully open position. 3. Replace the valve stem cap to prevent leaks. Tighten finger tight plus an additional 1/4 turn. Unit Side of Valve 1/4 Turn Only Counterclockwise for Full Open Position Valve Stem Pressure Tap Port Gas Line Connection Table 19. Open the Liquid Service Valve Cap WARNING SERVICE VALVES! Failure to follow this warning will result in abrupt release of system charge and may result in personal injury and/or property damage. Extreme caution should be exercised when opening the Suction and Liquid Line Service Valve. Turn valve stem counterclockwise only until the stem contacts the rolled edge. No torque is required. Unit Side of Service Valve Important: Leak check and evacuation must be completed before opening the service valves. 4. Remove service valve cap. 5. Fully insert 3/16" hex wrench into the stem and back out counterclockwise until valve stem just touches the rolled edge (approximately five (5) turns). 6. Replace the valve cap to prevent leaks. Tighten finger tight plus an additional 1/4 turn. Service Port 3/16" Hex Wrench Rolled Edge to Captivate Stem Hex Headed Valve System 11-BC45D1-1C-EN 15 Electrical Low Voltage Communicating Table 20. Low Voltage Maximum Wire Length Table 20, p. 16 defines the size and combined total maximum length of low voltage wiring from the outdoor unit, to the indoor unit, and to the thermostat. Note: The use of color coded low voltage wire is recommended to simplify connections between the outdoor unit, the control, and the indoor unit. Note: The maximum total cable length for the entire comfort control communicating system is 500 ft. 18 AWG. WIRE SIZE CONTROL WIRING MAX. WIRE LENGTH 18 AWG 500 Ft. Combined Figure 1. Fully Communicating System Communicating Outdoor Unit Neatly bundle all low voltage wires as shown. The Brown data wire used in AccuLink mode is NOT used in American Standard Link mode (Cap off if not used) UX360 Smart Thermostat R DH DL B Distribution Board R DH DL B Indoor Unit R DH DL B White Green Red Only used Blue for Load Shed, American Standard Link SmartChargeTM and to disable indoor heat during auxiliary power operation (Cap off if not used) SC360 System Controller R DH DL B 1. In communicating mode, unused terminals are non-functional. Do not use. 2. Terminals present will vary by indoor model. 3. "D" is the data line. Installer to select a wire color. Note: Anti-oxidizing grease is supplied in the documentation package for use when making low voltage field wiring connections at the outdoor unit. Apply grease to field wiring before installing wire caps to protect these connections from corrosion. 16 11-BC45D1-1C-EN Electrical Low Voltage Communicating Table 21. Low Voltage Hook-up Diagrams in AccuLink mode Figure 2. Fully Communicating System Communicating Outdoor Unit DH (Not used in AccuLink mode) DL Neatly bundle all low voltage wires as shown. Communicating Comfort Control Communicating Indoor Unit Note 4 R BK Brown D D - Note 3 Blue Y1 Y2 Note 1 D Brown R Red B Blue G & W1 W2 Note 2 W3 B B - Blue O Field wiring Red Note 5 Only used for Load Shed (Cap off if not used) 1. In communicating mode, unused terminals are non-functional. Do not use. 2. Terminals present will vary by indoor model. 3. "D" is the data line. Installer to select a wire color. 4. If a 3rd party condensate overflow switch is installed, it should be wired in series with R to the thermostat or connected to the External Switch terminals on the AFC. See External Switch wiring section in the air handler Installer's Guide. 5. Wire present only on Variable Speed Outdoor Units. Note: Anti-oxidizing grease is supplied in the documentation package for use when making low voltage field wiring connections at the outdoor unit. Apply grease to field wiring before installing wire caps to protect these connections from corrosion. 11-BC45D1-1C-EN 17 R DH DL B Electrical Low Voltage Communicating Table 22. American Standard Link Low Voltage Wire Connectors Link mode uses simple connectors for low voltage connections. These connections are color coded which makes the installation easier and quicker. American Standard Link Wire Colors R Red DH White DL Green B Blue Do the following to make the connections from the actual thermostat wire to the connector. Note: These connectors are necessary for the Outdoor unit, Indoor unit and Distribution board. 1. Strip the Red, White, Green and Blue thermostat wires back 1/4". 2. Insert the wires into the connector in the correctly colored locations. 3. When you feel it release, allow each wire to slide in further. 4. Pull back on the wires individually and slightly and check if the wires are seated properly. If each wire does not pull out for all four wires, the connection is complete. 5. Connectors are ONE TIME USE. If a 18 ga. Thermostat wire gets broken off inside of the connector, the connector will need replaced. 6. Wire colors are for illustration purposes only. If using a different color, ensure it lands at the correct terminal throughout all of the communicating control wiring. Strip the control wire back- 1/4" CAN Connector Note: For use with 18 ga. solid core thermostat wire. Connect the CAN connector into the male coupling on the low voltage harness at the Outdoor unit. This air handler has two dedicated CAN Connector headers on the Air Handler Control (AHC) board. In American Standard Link communicating mode, both of them are in the communicating loop. It does not matter which one goes to the thermostat, System Controller, distribution board, outdoor unit or any other Link accessory. Note: This connector should be removed when using this unit in AccuLink mode. 18 11-BC45D1-1C-EN Electrical -- High Voltage Table 23. High Voltage Power Supply WARNING LIVE ELECTRICAL COMPONENTS! Failure to follow this Warning could result in property damage, severe personal injury, or death. Follow all electrical safety precautions when exposed to live electrical components. It may be necessary to work with live electrical components during installation, testing, servicing, and troubleshooting of this product. The high voltage power supply must agree with the equipment nameplate. Power wiring must comply with national, state, and local codes. Follow instructions on unit wiring diagram located on the inside of the control box cover and in the Service Facts document included with the unit. Table 24. High Voltage Disconnect Switch WARNING HIGH LEAKAGE CURRENT! Failure to follow this Warning could result in property damage, severe personal injury, or death. Earth connection essential before connecting electrical supply. Install a separate disconnect switch at the outdoor unit. For high voltage connections, flexible electrical conduit is recommended whenever vibration transmission may create a noise problem within the structure. Table 25. High Voltage Disconnect Switch Do NOT connect the Variable Speed Outdoor units line voltage to a GFCI protected circuit. Ground the outdoor unit per national, state, and local code requirements. 11-BC45D1-1C-EN 19 Integrated Variable Speed Control Board LED Indicators J2 J10 J5 J3 J9 J8 J20 High FAN Voltage to Condensor Fan Motor PSC (not used) PWM EXT.ODT LSOV EEV T4 CDA T3 COCOMMMM PERSONALITY MODULE STSATTAUTUSS LOAD SHED HPCO T1 T2 9 18 CHARGE SOLENOID (N/A Phase I) 1 J1 10 DATA DRB ALUMINUM COVER PLATE J6 J4 MONITOR TOOL The Status (Green) and COMM (Amber) LEDs are located in the upper right region of the Control Board. Fault messages are displayed on the CANda Table 26. LED'S in AccuLink mode LED STATUS (GREEN) RATE SLOW MEDIUM FAST SOLID ON INTERMITTENT DESCRIPTION 1 TIME PER SECOND 2 TIMES PER SECOND 5 TIMES PER SECOND 1 FLASH EVERY 4 SECONDS Note: The STATUS Light is not illuminated in American Standard Link mode. Table 27. LED'S in AccuLink and American Standard Link modes LED COMM (AMBER) RATE SLOW FAST DESCRIPTION 1 TIME PER DEVICE 5 TIME PER SECOND INDICATION STANDBY/IDLE CALL FOR CAPACITY POWER UP DELAY TEST MODE HARD LOCKOUT INDICATION DEVICE COUNT LOSS OF COMMUNICATION 20 11-BC45D1-1C-EN Start Up 1. Ensure you have completed the following sections. "Refrigerant Line Brazing," p. 12 through "Electrical -- High Voltage," p. 19 2. Set System Thermostat to OFF. 3. Turn on disconnect(s) to apply power to the indoor and outdoor units. 4. Wait 3 hours before starting the unit if the outdoor ambient temperature is below 85° F. 5. Run the system using the "Charging Mode-Cooling" test mode found in the 850/950/1050 or UX360 Smart Thermostat controls. American Standard Link systems can also use the Diagnostic Mobile App to enter Test Modes. This is the only approved method for setting the system charge level by subcooling. Follow the on-screen prompts. Important: ENSURE INDOOR BLOWER IS CONFIGURED FOR 400 CFM/TON IN ACCULINK MODE ONLY. ON OFF 3 HRS. 11-BC45D1-1C-EN 21 System Charge Adjustment Table 28. Temperature Measurements Check the outdoor temperatures. Subcooling using "Charging Mode-Cooling" is the only recommended method of charging between 55 ° F and 120° F ambient outdoor temperature. For best results the indoor temperature should be kept between 70° F to 80° F. 120° F 55° F 80° F 70° F Table 29. Subcooling Charging Corrections Determine the final subcooling value using total Line Length and Lift measured in "Required Refrigerant Line Length" and the "Subcooling Charging Corrections Charts." Subcooling Charging Correction Worksheet Total Line Length (ft) ________________________ Total Vertical Charge (lift) ________________________ (Values from -- Required Refrigerant Line Length) Design Subcooling Value ________________________ (from nameplate or Service Facts) Final Subcooling Value ________________________ Note: The only mode approved for setting or validating system charge is using Charging Mode-Cooling. Charging Mode-Cooling is a variable speed test mode found in the 850/950/1050 and UX360 comfort control Technician Menu's. Test modes can also be accessed using the Diagnostic Mobile App on American Standard Link systems. Outdoor Temperature must be between 55°F and 120°F with Indoor Temperature kept between 70°F and 80°F. Important: VARIABLE SPEED OUTDOOR UNITS REQUIRE THE INDOOR UNIT BE CONFIGURED FOR 400 CFM/TON IN ACCULINK MODE. 22 11-BC45D1-1C-EN Subcool Charging Correction Charts Important: VARIABLE SPEED OUTDOOR UNITS REQUIRE THE INDOOR UNIT BE CONFIGURED FOR 400 CFM/TON IN ACCULINK MODE ONLY. Note: System will auto configure airflow in American Standard Link mode. REFRIGERANT LINE LIFT (FEET) Figure 3. Subcool Charging Corrections -- 2.0 Ton 2.0 TON SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 50 Add 1° Add 2° 40 Add 1° 30 25 Use Design Subcooling 15 10 0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FEET) REFRIGERANT LINE LIFT (FEET) Figure 4. Subcool Charging Corrections -- 3.0 Ton 3.0 TON SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 50 Add 1° Add 2° 40 Add 1° 30 25 Use Design Subcooling 15 10 0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FEET) REFRIGERANT LINE LIFT (FEET) Figure 5. Subcool Charging Corrections -- 4.0 Ton 4.0 TON SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 50 Add 1° Add 2° 40 Add 1° 30 1° 25 Use Design Subcooling 1° 15 1° 10 0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FEET) Figure 6. Subcool Charging Corrections --5.0 Ton 5.0 TON SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) REFRIGERANT LINE LIFT (FEET) 50 1° Add 4° 40 Add 1° Add 2° 30 Use Design Subcooling 25 Add 1° 15 AC: 1-1/8" Vapor Line Limit 10 Add 1° 0 1° 20 30 40 50 60 70 80 90 100 110 120 130 140 150 TOTAL REFRIGERANT LINE LENGTH (FEET) NOTE: 150 ft. length is approved ONLY with 7/8" vapor lines. 11-BC45D1-1C-EN 23 Subcool Charging Correction Charts Refrigerant Charging Chart R-410A REFRIGERANT CHARGING CHART LIQUID TEMP (°F) 8 DESIGN SUBCOOLING (°F) 9 10 11 12 LIQUID GAGE PRESSURE (PSI) 55 179 182 185 188 191 60 195 198 201 204 208 65 211 215 218 222 225 70 229 232 236 240 243 75 247 251 255 259 263 80 267 271 275 279 283 85 287 291 296 300 304 90 309 313 318 322 327 95 331 336 341 346 351 100 355 360 365 370 376 105 381 386 391 396 402 110 407 413 418 424 429 115 435 441 446 452 458 120 464 470 476 482 488 125 495 501 507 514 520 13 14 195 198 211 215 229 232 247 251 267 271 287 291 309 313 331 336 355 360 381 386 407 413 435 441 464 470 495 501 527 533 24 11-BC45D1-1C-EN Charging the Unit Important: ENSURE INDOOR BLOWER IS CONFIGURED FOR 400 CFM/TON IN ACCULINK MODE. Table 30. Proper Gage Pressure Using the Standard R-410A Subcool Charging Chart, adjust refrigerant level to attain proper gage pressure. Add refrigerant if the Liquid Gage Pressure is lower than the chart value. 1. Connect gauges to refrigerant bottle and unit as illustrated. 2. Purge all hoses. 3. Open bottle. 4. Stop adding refrigerant when liquid line temperature and Liquid Gage Pressure match the charging chart. Note: Recover refrigerant if the Liquid Gage Pressure is higher than the chart value. Table 31. Stabilize the system 5. Wait 20 minutes for the system condition to stabilize between adjustments. Note: When the Liquid Line Temperature and Gage Pressure approximately match the chart, the system is properly charged. 6. Remove gauges. 7. Replace service port caps to prevent leaks. Tighten finger tight plus an additional 1/6 turn. 20 MIN. Table 32. Verify Performance 8. Refer to System Pressure Curves in the Service Facts document to verify typical performance. SUCTION PRESSURE (PSIG) DISCHARGE PRESSURE (PSIG) PRESSURE CURVE SAMPLE Cooling @ 1450 SCFM Heating @ 1350 SCFM 550 INDOOR ENTERING WET BULB CURVES 500 TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. 450 400 350 (4) (3) 300 250 (1) 200 40 60 80 100 (2) 120 500 INDOOR ENTERING DRY BULB CURVES 450 TOP TO BOTTOM 80, 70, AND 60 DEG F. 400 350 300 250 200 -5 5 15 25 35 45 55 65 OUTDOOR TEMPERATURE (Degree F) 170 INDOOR ENTERING 165 WET BULB CURVES TOP TO BOTTOM 160 71, 67, 63 AND 59 DEG F. 155 150 145 (5) 140 (3) 135 130 125 120 115 (1) 110 40 60 80 100 (2) 120 140 INDOOR ENTERING 130 DRY BULB CURVES TOP TO BOTTOM 120 80, 70, AND 60 DEG F. 110 100 90 80 70 60 50 40 30 -5 5 15 25 35 45 55 65 Table 33. System Information 9. Record system pressures and temperatures after charging is complete. Outdoor model number = ________________________ Measured Outdoor Ambient = ________________________°F Measured Indoor Ambient = ________________________°F Measured Liquid Line Temp = ________________________°F Measured Suction Line Temp = ________________________°F Indoor Wet Bulb = ________________________°F Liquid Gage Pressure = ________________________ PSIG Suction Gage Pressure = ________________________ PSIG 11-BC45D1-1C-EN 25 Subcooling Charging Below 55º F Outdoor Temp. (In Heating Only) Table 34. Subcooling Charging Below 55º F Outdoor Temp. (In Heating Only) The Subcooling Charging method in cooling is not recommended below 55º F outdoor temperature. The only recommended method of charging at outdoor temperatures below 55º F is weighing in the charge in heating mode and referencing the refrigerant pressure curves for typical performance. STEP 1 - Determine additional charge. Note: The nameplate charge value represents the amount of refrigerant shipped in the outdoor unit and is compatible with 10 feet of AHRI rated refrigerant lines and the smallest AHRI rated coil. Using the method below, find the charge associated with the additional length of tubing above 10 ft. and record it below. Calculating Charge Using the Weigh-In Method 1. Measure in feet the distance between the outdoor unit and the indoor unit. (Include the entire length of the line from the service valve to the IDU.) Subtract 10 ft from this entire length and record on line 1. 2. Enter the charge multiplier (0.6 oz/ft). Each linear foot of interconnecting tubing requires the addition of 0.6 oz of refrigerant. 3. Multiply the total length of refrigerant tubing (Line 1) times the value on Step 2. Record the result on Line 3 of the Worksheet. 4. This is the amount of refrigerant to weigh-in prior to opening the service valves. Weigh-In Method can be used for the initial installation, or anytime a system charge is being replaced. Weigh-In Method can also be used when power is not available to the equipment site or operating conditions (indoor/outdoor temperatures) are not in range to verify with the subcooling charging method. 1. Total Line length (ft) 10 ft _______________ 2. Charge multiplier x ____0.6 oz______ 3. Step 1 x Step 2 = ______________ 4. Refrigerant (oz) = ______________ STEP 2 - Stabilize the system by operating for a minimum of 20 minutes. At startup, or whenever charge is removed or added, the system must be operated for a minimum of 20 minutes to stabilize before accurate measurements can be made. 20 MIN. STEP 3 - Check the liquid line temperature and liquid gage pressure to obtain a minimum of 10º subcooling in heating mode. Measured Liquid Line Temp = __________ º F Liquid Gage Pressure = __________ PSIG STEP 4 - Add charge if a minimum of 10º subcooling is not obtained with the namplate charge plus additional charge previously added. STEP 5 - Return to site for adjustment. Important: Return in the spring or summer to accurately charge the system in the cooling mode with outdoor ambient above 55º F. 26 11-BC45D1-1C-EN Communicating Display Assembly (CANda) SYSTEM STATUS XXXXXXXXXXXXXXXX NAVIGATION · To enter and exit Technician Menus, press the Up/Down buttons simultaneously for 5 seconds. · To return to the Home Screen, press the Up/Down buttons simultaneously for 5 seconds. · To return to the top level of any menu, press the Left/Right buttons simultaneously for 5 seconds. · After five minutes of inactivity in the Technician Menu section, the Home Screen will be displayed. Pressing the Enter button for 5 seconds will increase this time to 20 minutes. TECHNICIAN MENUS MONITOR MENU ALERT MENU ALERT HISTORY MENU CONFIG MENU The Monitor Menu The Alert Menu displays information displays active alerts. on System status, Drive stats and the System Tachometer. Scan to see an overview video about the CANda The Alert History menu displays alerts stored over time. Note that clearing Alert History will also clear Active Alerts. The Configuration Menu is where System parameters and options are set and reported. 1. External shut down (Load Shed) 2. Min. Airflow 3. Blower on/off delays 4. Custom Airflow 5. PFC (Power Factor Correction) CONTROL MENU The Control Menu contains a selection of unit function tests that are used to verify operation. 1. FRC DFT (Forced Defrost) 2. EEV Test 3. Evacuation 4. Drive Diagnostic Test 5. OD Fan Test Note: CONFIG MENU is only available in AccuLink mode. Note: See the Service Facts found in the control box of the outdoor unit for more information. 11-BC45D1-1C-EN 27 Defrost Control (Heat Pump only) Demand Defrost The demand defrost control measures heat pump outdoor ambient temperature with a sensor located outside the outdoor coil. A second sensor located on the outdoor coil is used to measure the coil temperature. The difference between the ambient and the colder coil temperature is the difference or delta-T measurement. This delta-T measurement is representative of the operating state and relative capacity of the heat pump system. By measuring the change in delta-T, we can determine the need for defrost. The coil sensor also serves to sense outdoor coil temperature for termination of the defrost cycle. Fault Identification A fault condition is indicated by the CANda connected to the control board inside the heat pump control box. Defrost Enabled Demand Defrost is enabled with the following inputs to the Integrated Variable Speed Control (IVSC): · Outdoor ambient temperature sensor (ODS-B) reporting an outdoor temperature at or below 52° F. · Coil temperature sensor (CBS) reporting a coil temperature at or below 35° F. · Heat/Cool Demand (HCD) from the communicating comfort control for at least two minutes or more. Defrost Initiation The calculated temperature difference between the outdoor temperature sensor and the coil temperature sensor is called Delta T. Defrost can occur once the current Delta T exceeds the Delta T initiate value. This adaptive logic assures a complete defrost for a range of outdoor temperatures. DEFROST TERMINATION PROFILES 65ºF HIGH TERMINATION TEMP 60ºF 55ºF MEDIUM TERMINATION TEMP TERMINATION TEMPERATURE 50ºF FACTORY TERMINATION TEMP 45ºF 40ºF SOFTWARE 1.0/2.0 35ºF SOFTWARE 3.0 AND LATER 30ºF -40ºF -20ºF 0ºF 20ºF 40ºF 60ºF AMBIENT TEMPERATURE Note: A forced Defrost test can be entered through the 850/950/1050 or UX360 thermostats, the outdoor unit CANda or the American Standard Link Diagnostic Mobile App. 28 CANda Navigation to Forced Defrost Figure 7. CANda Mini Menu CONFIG MENU CONTROL MENU MONITOR MENU FRC DFT PRESS ENTER TEST IN PROGRESS CTS <value> TEST COMPLETE Note: CONFIG MENU only available in AccuLink mode NOTES: Forced Defrost 1. System must be running with demand from the thermostat. 2. FRC DFT TEST can be initiated in heat mode only. DFC TEST can be entered from the CANda or Thermostat on AccuLink systems or from the CANda, UX360 User Interface or Diagnostic Mobile App in American Standard Link systems. Indoor AUX heat will energize when FRC DFT TEST is selected from the Outdoor CANda. 3. Press ENTER to begin forced defrost. 4. Execute Forced Defrost following Forced Defrost (Defrost terminates on Coil Temperature or maximum time override of 15 minutes). 5. When test begins, TEST IN PROGRESS displays on line 1 and Coil Temperature value on line 2. Note: Home Screen, under System Status will display DEFROST. 6. When test is complete, TEST COMPLETE displays for 10 seconds. 7. If there is a defrost fault condition, test terminates and sends alert to the alert menu. 8. For more information, refer to the Alert Code Tables in Service Facts and Technical Service Manual (Pub. No. 34430101 or newer) documents. Note: Screens will update as the test proceeds. Note: Entering Forced Defrost from 850/950 or 1050 will not energize the indoor heat in AccuLink mode. Indoor heat will energize if entered from outdoor CANda. Note: Can enter Forced Defrost from UX360, CANda or the Diagnostic Mobile App in American Standard Link mode. 11-BC45D1-1C-EN Checkout Procedures The final phase of the installation is the system Checkout Procedures. The following list represents the most common items covered in a Checkout Procedure. Confirm all requirements in this document have been met. All wiring connections are tight and properly secured. Voltage and running current are within limits. All refrigerant lines (internal and external to equipment) are isolated, secure, and not in direct contact with each other or structure. All braze connections have been checked for leaks. A vacuum of 350 microns provides confirmation that the refrigeration system is leak free and dry. Final unit inspection to confirm factory tubing has not shifted during shipment. Adjust tubing if necessary so tubes do not rub against each other or any component when unit runs. Ductwork is sealed and insulated. All drain lines are clear with joints properly sealed. Pour water into drain pan to confirm proper drainage. Provide enough water to ensure drain trap is primed. Supply registers and return grilles are open, unobstructed, and air filter is installed. Indoor blower and outdoor fan are operating smoothly and without obstruction. Indoor blower motor set on correct speed setting to deliver required CFM. "Blower and fan set screws are tight." Cover panels are in place and properly tightened. For gas heating systems, manifold pressure has been checked and all gas line connections are tight and leak free. For gas heating systems, flue gas is properly vented. System functions safely and properly in all modes. Owner has been instructed on use of system and given manual. 11-BC45D1-1C-EN 29 Notices FCC Notice Contains FCC ID: WAP3025 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter. This equipment has been tested and found to comply with the limits for Class B Digital Device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures. · Reorient or relocate the receiving antenna · Increase the separation between the equipment and receiver · Connect the equipment into an outlet on a circuit different from that to which the receiver is connected · Consult the dealer or an experienced radio/TV technician for help Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. IC Notice Contains IC ID: 7922A-3025 This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le present appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de license. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil de doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. 30 11-BC45D1-1C-EN Notes 11-BC45D1-1C-EN 31 About American Standard Heating and Air Conditioning American Standard has been creating comfortable and affordable living environments for more than a century. For more information, please visit www.americanstandardair.com. The AHRI Certified mark indicates company participation in the AHRI Certification program. For verification of individual certified products, go to ahridirectory.org. The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices. 11-BC45D1-1C-EN 09 Aug 2022 Supersedes 11-BC45D1-1B-EN (September 2021) ©2022 American Standard Heating and Air Conditioning