User Manual

ManualsBrandsAmerican Standard ManualsCondensing UnitsAmerican Standard 4A7A5018 06 Condensing Units

11-AC46D1-1B-EN

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.

Condensing Units

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.

4A7A5018 – 060

Table of Contents

Section 1. Safety ..................................................................................... 2

Section 2. Unit Location Considerations ............................................. 3

Section 3. Unit Preparation.................................................................... 4

Section 4. Setting the Unit ..................................................................... 5

Section 5. Refrigerant Line Considerations ......................................... 5

Section 6. Refrigerant Line Routing ..................................................... 6

Section 7. Refrigerant Line Brazing ...................................................... 7

Section 8. Refrigerant Line Leak Check ............................................... 9

Section 9. Evacuation ............................................................................ 9

Section 10. Service Valves .................................................................. 10

Section 11. Electrical - Low Voltage ................................................... 10

Section 12. Electrical - High Voltage .................................................. 13

Section 13. Start Up.............................................................................. 13

Section 14. System Charge Adjustment............................................. 14

Section 15. Checkout Procedures ...................................................... 19

Section 16. Refrigeration Circuits........................................................20

Section 17. Wiring Diagrams................................................................22

Section 18. Pressure Curves................................................................26

Installation and Operation Manual

Summary of content (28 pages)

PAGE 1
1-AC46D1-1B-EN Installation and Operation Manual Condensing Units 4A7A5018 – 060 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 information 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.
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Section 1. Safety ! WARNING This information is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience. Any attempt to repair a central air conditioning product may result in personal injury and/or property damage. The manufacture or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
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Section 2. Unit Location Considerations 2.1 Unit Dimensions and Weight Table 2.1 Unit Dimensions and Weight W Models H x D x W (in) Weight* (lb) 4A7A5018N 29 x 30 x 33 161 4A7A5024N 29 x 30 x 33 162 4A7A5030N 37 x 30 x 33 184 4A7A5036N 37 x 34 x 37 212 4A7A5042N 45 x 34 x 37 252 4A7A5048N 45 x 34 x 37 256 4A7A5060N 45 x 34 x 37 252 H * Weight values are estimated. When mounting the outdoor unit on a roof, be sure the roof will support the unit’s weight.
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2.3 Suggested Locations for Best Reliability Ensure the top discharge area is unrestricted for at least five (5) feet above the unit. Avoid Install Near Bedrooms Three (3) feet clearance must be provided 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. Min 5’ Unrestricted Min.
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Section 4. Setting the Unit 4.1 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. Section 5. Refrigerant Line Considerations 5.
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5.4 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 Vapor Line Insulation 5.5 Reuse Existing Refrigerant Lines ! CAUTION If using existing refrigerant lines make certain that all joints are brazed, not soldered.
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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 Insulation Vapor Line Isolator Line Set Isolation Through Wall DO NOT hang line sets from ductwork Section 7. Refrigerant Line Brazing 7.1 Braze The Refrigerant Lines STEP 1 - Remove caps or plugs. Use a deburing tool to debur the pipe ends.
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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 nitrogen purge. Braze the refrigerant lines to the service valves.
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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 evaporator coil to 150 PSIG using dry nitrogen. 150 PSIG STEP 2 - Check for leaks by using a soapy solution or bubbles at each brazed location. Remove nitrogen pressure and repair any leaks before continuing. Section 9. Evacuation 9.
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STEP 2 - Observe the micron gauge. Evacuation is complete if the micron gauge does not rise above 500 microns in one (1) minute. 1 MIN. Once evacuation is complete blank off the vacuum pump and micron gauge, and close the valves on the manifold gauge set. Section 10. Service Valves 10.1 Open the Gas Service Valve Important: Leak check and evacuation must be completed before opening the service valves.
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.2 Low Voltage Hook-up Diagrams With TEM 3, 4, 6, 8 Thermostat Outdoor Unit Air Handler 24 VAC HOT R R FAN G G With TAM 4, 7, 9 Thermostat Air Handler 24 VAC HOT R R FAN G G B/C Blue Outdoor Unit ** 24 VAC Common B/C B Blue B O SOV COOL/HEAT 1st STAGE Y Y1 24 VAC Common B O SOV Y COOL/HEAT 1st STAGE Yl Yl Y2* YO HEATING 2nd STAGE W1 W1 HEATING 2nd STAGE W1 W1 EMERGENCY HEAT W2 W2 EMERGENCY HEAT W2 W2 White Pink B YO White Pink BK BK BK BK WH/BLK
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2 Stage AC Thermostat AUX 1 AUX 2 24VAC HOT COMMON SOV COOLING FAN HEATING ODT RS 12 AUX 1 AUX 1 AUX 2 AUX 2 RC RH B/C O Y1 Y2 G BK W1 W2 W3 ODT ODT RS1 RS1 INDOOR UNIT OUTDOOR UNIT R B/C B O Y1/YIo Y Y/Y2 G BK W1 W2 11-AC46D1-1B-EN
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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 necessary to work with live electrical components. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. The high voltage power supply must agree with the equipment nameplate.
PAGE 14
STEP 3 - Turn on disconnect(s) to apply power to the indoor and outdoor units. ON OFF STEP 4 - Wait one (1) hour before starting the unit if compressor crankcase heater accessory is used and the Outdoor Ambient is below 70ºF. 60 MIN. STEP 5 - Set system thermostat to ON. ON DONE CANCEL 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.
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14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.) STEP 1 - Use the refrigerant line total length and lift measurements from Section 5.3. Total Line Length = __________ Ft. Vertical Change (Lift) = __________ Ft.
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STEP 3 - 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 4 - Measure the liquid line temperature and pressure at the outdoor unit’s service valve.
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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. Stop adding refrigerant when liquid line temperature and Liquid Gage Pressure matches the charging chart Final Subcooling value. Recover refrigerant if the Liquid Gage Pressure is higher than the chart value. STEP 7 - Stabilize the system. 1.
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Fixed Orifice Superheat Charging Table Indoor Wet Bulb Temp (F) 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 55 7 9 10 11 12 14 15 17 18 20 21 23 24 26 27 29 30 60 5 7 8 9 10 12 13 15 16 18 19 21 22 24 25 27 4 6 8 10 11 13 14 16 17 18 19 21 22 5 7 8 10 11 13 14 16 17 18 19 5 6 7 9 10 12 14 16 18 19 21 22 24 26 28 29 31 32 4 6 7 9 10 11 12 14 16 18 19 21 23 25 26 4 6 7 9 10 13 14 16 18
PAGE 19
Section 15. Checkout Procedures 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 necessary so tubes do not rub against each other when the unit runs. Also be sure that wiring connections are tight and properly secured.
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Section 16.
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5042 & 5048 Models Printed from D157878 5060 Models Printed from D159175 11-AC46D1-1B-EN 21
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Section 17.
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4A7A5018 - 048 Models 11-AC46D1-1B-EN 23
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4A7A5060 Models 24 11-AC46D1-1B-EN
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4A7A5060 Models 11-AC46D1-1B-EN 25
PAGE 26
Section 18. Pressure Curves PRESSURE CURVES (Refer below table for models) LIQUID PRESSURE (PSIG) 520 470 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. (2) 420 370 320 (3) (4) 270 220 (1) 170 40 50 60 70 80 90 100 110 120 OD Model Cooling @SCFM 4A7A5018N1 600 OUTDOOR TEMPERATURE (Degree F) 170 SUCTION PRESSURE (PSIG) 165 160 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
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PRESSURE CURVES (Refer below table for models) LIQUID PRESSURE (PSIG) 520 470 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. (2) 420 370 320 (3) (4) 270 220 (1) 170 40 50 60 70 80 90 100 110 120 OUTDOOR TEMPERATURE (Degree F) 170 SUCTION PRESSURE (PSIG) 165 160 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.
PAGE 28
PRESSURE CURVES (Refer below table for models) LIQUID PRESSURE (PSIG) 520 470 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F. (2) 420 370 320 (3) (4) 270 220 (1) 170 40 50 60 70 80 90 100 110 120 OD Model Cooling @SCFM 4A7A5060N1 1450 OUTDOOR TEMPERATURE (Degree F) 170 SUCTION PRESSURE (PSIG) 165 160 INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.