Table of Contents
Advertisement
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT - This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser's purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture's split
systems are AHRI rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and out-
door split systems are maximum efficiency, optimum performance and the best overall system reliability.
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations.............................................. 3
Section 3. Unit Preparation .................................................................... 5
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 6
Section 6. Refrigerant Line Routing ..................................................... 8
Section 7. Refrigerant Line Brazing ...................................................... 8
Section 8. Refrigerant Line Leak Check ............................................. 10
Section 9. Evacuation ........................................................................... 12
Section 10. Service Valves ................................................................... 12
Section 11. Electrical - Low Voltage .................................................... 13
Section 12. Electrical - High Voltage ................................................... 15
Section 13. Start Up .............................................................................. 16
Section 14. System Charge Adjustment ............................................. 17
Section 15. Checkout Procedures and Troubleshooting ................... 23
Installer's Guide
Condensing Units
4A7A7
11-AC35D1-4-EN
Advertisement
Table of Contents
Related Manuals for American Standard 4A7A7
Summary of Contents for American Standard 4A7A7
-
Page 1: Table Of Contents
11-AC35D1-4-EN Installer’s Guide Condensing Units 4A7A7 ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service informa- tion pack upon completion of work. -
Page 2: Section 1. Safety
Section 1. Safety WARNING WARNING LIVE ELECTRICAL COMPONENTS! This information is intended for use by individuals During installation, testing, servicing, and trouble- possessing adequate backgrounds of electrical and shooting of this product, it may be necessary to work mechanical experience. Any attempt to repair a central with live electrical components. -
Page 3: Section 2. Unit Location Considerations
Section 2. Unit Location Considerations 2.1 Unit Dimensions and Weight Table 2.1 Unit Dimensions and Weight Models H x D x W (in) Weight* (lb) 4A7A7024A 41 x 34 x 37 4A7A7036A 45 x 34 x 37 4A7A7048A 45 x 34 x 37 4A7A7060A 45 x 34 x 37 * Weight values are estimated. - Page 4 2.3 Suggested Locations for Best Reliability Ensure the top discharge area is unrestricted for Avoid Install at least five (5) feet above the unit. Near Bedrooms Three (3) feet clearance must be provided in front of the control box (access panels) and any other side requiring service.
-
Page 5: Section 3. Unit Preparation
2.5 Coastal Considerations If installed within one mile of salt water, including seacoasts and inland waterways, models without factory sup- plied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time. Section 3. Unit Preparation 3.1 Prepare The Unit For Installation STEP 1 - Check for damage and report prompt- ly to the carrier any damage found to the unit. -
Page 6: Section 5. Refrigerant Line Considerations
Section 5. Refrigerant Line Considerations 5.1 Refrigerant Line and Service Valve Connection Sizes Table 5.1 Line Sizes Service Valve Connection Sizes Max Line & Lift Lengths RATED LINE SIZES Vapor Liquid Vapor Line Liquid Line TOTAL Max Max Lift (ft.) Line Line Connection... - Page 7 5.2 Factory Charge American Standard outdoor condensing units are factory charged with the system charge required for the out- door condensing unit, fifteen (15) feet of tested connecting line, and the smallest indoor evaporative coil match. If connecting line length exceeds fifteen (15) feet and/or a larger indoor evaporative coil is installed, then final refrigerant charge adjustment is necessary.
-
Page 8: Section 6. Refrigerant Line Routing
5.5 Reuse Existing Refrigerant Lines CAUTION 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: •... - Page 9 8 Feet Maximum Wall Isolator Line Set 8 Feet Maximum Side View Secure Vapor Line using isolators every 8 ft. Secure Liquid Line directly to Vapor Line using tape, wire, or other appropriate method every 8 ft. Isolation In Wall Spaces Wall Sealant Ductwork...
-
Page 10: Section 8. Refrigerant Line Leak Check
STEP 2 - Remove the pressure tap cap and valve cores from both service valves. STEP 3 - Purge the refrigerant lines and indoor coil with dry nitrogen. STEP 4 - Wrap a wet rag around the valve body to avoid heat damage and continue the dry nitro- gen purge. - Page 11 STEP 5 - Replace the pressure tap valve cores after the service valves have cooled. Section 8. Refrigerant Line Leak Check 8.1 Check For Leaks STEP 1 - Pressurize the refrigerant lines and 150 PSIG evaporator coil to 150 PSIG using dry nitrogen. STEP 2 - Check for leaks by using a soapy solu- tion or bubbles at each brazed location.
-
Page 12: Section 9. Evacuation
Section 9. Evacuation 9.1 Evacuate the Refrigerant Lines and Indoor Coil Important: Do not open the service valves until the refrigerant lines and indoor coil leak check and evacuation are complete. 0350 Microns STEP 1 - Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump. -
Page 13: Section 11. Electrical - Low Voltage
10.1 Open the Liquid Service Valve WARNING Extreme caution should be exercised when opening the Liquid Line Service Valve. Turn counterclockwise until the valve stem just touches the rolled edge. No torque is required. Unit Side 3/16” Hex Wrench Failure to follow this warning will result in abrupt of Service release of system charge and may result in Valve... - Page 14 11.2 Low Voltage Hook-up Diagrams With TEM 6 With TAM 7 Outdoor Outdoor Thermostat Air Handler Thermostat Air Handler Unit Unit 24 VAC HOT 24 VAC HOT 24 VAC 24 VAC Common Common Blue Blue COOL/HEAT COOL/HEAT 1st STAGE 1st STAGE COOL/HEAT 1st STAGE HEATING...
-
Page 15: Section 12. Electrical - High Voltage
With Variable Speed S-Series Furnace Outdoor Thermostat Furnace Unit NOTES: 1) For PWM (BK) enabled thermostats, cut the BK jumper on 24 VAC HOT the IFC and connect wiring. 2) The factory Y1-O jumper must remain in place for proper LED read out in cooling mode. -
Page 16: Section 13. Start Up
12.3 High Voltage Ground Ground the outdoor unit per national, state, and local code requirements. Section 13. Start Up 13.1 System Start Up STEP 1 - Ensure Sections 7 through 12 have been completed. STEP 2 - Set System Thermostat to OFF. DONE CANCEL STEP 3 - Turn on disconnect(s) to apply power... -
Page 17: Section 14. System Charge Adjustment
Section 14. System Charge Adjustment 14.1 Temperature Measurements STEP 1 - Check the outdoor temperatures. 120º F See Section 14.2 for Subcooling (in cooling mode) is the only recom- Outdoor mended method of charging above 55º F ambi- ent outdoor temperature. See Section 14.2. Temperatures 55º... - Page 18 STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. 2 Ton Heat AC 3 Ton Heat AC SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) 4°...
- Page 19 STEP 4 - Measure the liquid line temperature and pressure at the outdoor unit’s service valve. Measured Liquid Line Temp = __________ º F Liquid Gage Pressure = __________ PSIG Final Subcooling Value = __________ º F 107 °F STEP 5 - Use the final subcooling value, refriger- Table 14.2 ant temperature and pressure from STEP 4, to R-410A REFRIGERANT CHARGING CHART...
- Page 20 STEP 6 - Adjust refrigerant level to attain proper gage pressure. Add refrigerant if the Liquid Gage Pressure is lower than the chart value. 1. Connect gages to refrigerant bottle and unit as illustrated. 2. Purge all hoses. 3. Open bottle. 4.
- Page 21 STEP 9 - Record System Information for refer- ence. Record system pressures and temperatures after charging is complete. Measured Suction Line Temp = __________ º F Outdoor model number = _________________ Liquid Gage Pressure = __________ PSIG Measured Outdoor Ambient = __________ º F Suction Gage Pressure = __________ PSIG Measured Indoor Ambient = __________ º...
- Page 22 STEP 2 - Stabilize the system by operating for a minimum of 20 minutes. 20 MIN. At startup, or whenever charge is removed or added, the system must be operated for a mini- mum of 20 minutes to stabilize before accurate measurements can be made.
-
Page 23: Section 15. Checkout Procedures And Troubleshooting
Section 15. Checkout Procedures and Troubleshooting 15.1 Operational And Checkout Procedures Final phases of this installation are the unit Operational and Checkout Procedures. To obtain proper performance, all units must be operated and charge adjustments made. Important: Perform a final unit inspection to be sure that factory tubing has not shifted during shipment. Adjust tubing if nec- essary so tubes do not rub against each other when the unit runs. - Page 24 The manufacturer has a policy of continuous product and product data improvement and it reserves the right to change design and specifications without notice. 6200 Troup Highway Representative-only illustrations included in this document. Tyler, TX 75707 www.americanstandardair.com © 2016 American Standard Heating & Air Conditioning 08/16...