Table of Contents
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- 1 Table of Contents
- 2 Section 2. Unit Location Considerations
- 3 Section 4. Setting the Unit
- 4 Section 5. Refrigerant Line Considerations
- 5 Section 11. Electrical - Low Voltage
- 6 Section 12. Electrical - High Voltage
- 7 Section 14. System Charge Adjustment
- 8 Section 17. Wiring Diagrams
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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. Some of the benefits of
installing approved matched indoor and outdoor 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 ...................................................... 9
Section 8. Refrigerant Line Leak Check ............................................. 11
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 ...................................................... 23
Section 16. Refrigerant Circuits .......................................................... 24
Section 17. Wiring Diagrams ............................................................... 26
Section 18. Pressure Curves ............................................................... 34
Installation and Operation Manual
Condensing Units
4A7A3
11-AC29D1-10C-EN
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Summary of Contents for American Standard 4A7A3
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Page 1: Table Of Contents
11-AC29D1-10C-EN Installation and Operation Manual Condensing Units 4A7A3 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) 4A7A3018N 29 x 26 x 29 4A7A3024N 29 x 26 x 29 4A7A3030N 29 x 30 x 33 4A7A3036N 29 x 30 x 33 4A7A3042N... - 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.
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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 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) or superheat (fixed orifice) per the unit nameplate. 5.3 Required Refrigerant Line Length Determine required line length and lift.
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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: Section 7. Refrigerant Line Brazing
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 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.
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Page 11: Section 8. Refrigerant Line Leak Check
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 3, 4, 6, 8 With TAM 4, 7, 9 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...
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Page 15: Section 12. Electrical - High Voltage
Section 12. Electrical - High Voltage 12.1 High Voltage Power Supply WARNING LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing, and troubleshooting of this product, it may be nec- essary to work with live electrical components. Failure to follow all electrical safety precau- tions when exposed to live electrical compo- nents could result in death or serious injury. -
Page 16: Section 13. Start Up
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 to the indoor and outdoor units. STEP 4 - Wait one (1) hour before starting the unit if compressor crankcase heater acces- sory is used and the Outdoor Ambient is below... -
Page 17: Section 14. System Charge Adjustment
Section 14. System Charge Adjustment 14.1 Temperature Measurements (Systems can be rated with TXV, EEV or Piston. Ensure charging method is correct.) 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... - Page 18 STEP 2 - Determine the final subcooling value using total Line Length and Lift measured in STEP 1 and the charts below. 1.5 Ton Units 2 Ton Units SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) Add 4°...
- Page 19 STEP 3 - Stabilize the system by operating for a minimum of 20 minutes. At startup, or whenever charge is removed or 20 MIN. added, the system must be operated for a mini- mum of 20 minutes to stabilize before accurate measurements can be made.
- 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 Fixed Orifice Superheat Charging Table Indoor Wet Bulb Temp (F) Outdoor Bulb Temp. Using a digital psychrometer, measure the return air wet-bulb temperature at the unit just before the coil. Also measure the outdoor dry-bulb tem- perature. Use these temperatures to locate the target superheat on the charging table. Do not attempt to charge the system if these conditions fall outside of this charging table.
- Page 22 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...
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Page 23: Section 15. Checkout Procedures
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 24: Section 16. Refrigerant Circuits
Section 16. Refrigerant Circuits 1.5 & 2 Ton Units PRINTED FROM D157394P02 REV A 2.5 & 3.5 Ton Units PRINTED FROM D157394P01 11-AC29D1-10C-EN... - Page 25 3 & 4 Ton Units PRINTED FROM D158796P01 REV A 5 Ton Units 11-AC29D1-10C-EN...
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Page 26: Section 17. Wiring Diagrams
Section 17. Wiring Diagrams 018N, 030N, 036N, 042N & 048N Models 018H, 024H, 043A & 049A Models PRINTED FROM D157362P05 REVB 11-AC29D1-10C-EN... - Page 27 018N, 030N, 036N, 042N & 048N Models 018H, 024H, 043A & 049A Models PRINTED FROM D157362P05 REVB 11-AC29D1-10C-EN...
- Page 28 024N Models 11-AC29D1-10C-EN...
- Page 29 024N Models 11-AC29D1-10C-EN...
- Page 30 030H, 036H & 042E Models 11-AC29D1-10C-EN...
- Page 31 030H, 036H & 042E Models 11-AC29D1-10C-EN...
- Page 32 060N Models 048E & 060E Models 11-AC29D1-10C-EN...
- Page 33 060N Models 048E & 060E Models 11-AC29D1-10C-EN...
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Page 34: Section 18. Pressure Curves
Section 18. Pressure Curves PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM OUTDOOR TEMPERATURE (Degree F) 4A7A3018N1 4A7A3024N1 170.0 INDOOR ENTERING 165.0 WET BULB CURVES TOP TO BOTTOM 160.0... - Page 35 PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM 4A7A3030N1 OUTDOOR TEMPERATURE (Degree F) 4A7A3036N1 1000 1300 4A7A3042N1 INDOOR ENTERING WET BULB CURVES 1400 4A7A3048N1 TOP TO BOTTOM...
- Page 36 PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM OUTDOOR TEMPERATURE (Degree F) 4A7A3018H1 4A7A3024H1 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
- Page 37 PRESSURE CURVES (Refer below table for models) INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. Cooling OD Model @SCFM 4A7A3030H1 4A7A3036H1 1100 OUTDOOR TEMPERATURE (Degree F) 1250 4A7A3042E1 4A7A3043A1 1250 INDOOR ENTERING 1400 WET BULB CURVES 4A7A3048E1 TOP TO BOTTOM...
- Page 38 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.
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How many tons and seers is the American standard Condensing Unit 4a7a3060t
The American Standard Condensing Unit 4A7A3 has a tonnage of 2 tons and a SEER rating of 13.
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Where abouts is the reset button on this ac unit