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. June 2017 11-AC40D1-1B-EN Side Discharge AC Models 4A7L6018A1000A 4A7L6024A1000A 4A7L6030A1000A 4A7L6036A1000A 4A7L6042A1000A 4A7L6048A1000A 4A7L6060A1000A Note:“Graphicsinthisdocumentarefor representation only. Actual model may differ in appearance.” Installer’s Guide
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SSAAFFEETTYY WWAARRNNIINNGGOnly qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, andair-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or alteredequipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in theliterature and on the tags, stickers, and labels that are attached to the equipment.
June 2017 1111--AACC4400DD11--11BB--EENN
Side Discharge AC Models4A7L6018A1000A4A7L6024A1000A4A7L6030A1000A4A7L6036A1000A4A7L6042A1000A4A7L6048A1000A4A7L6060A1000A
NNoottee:: “Graphics in this document are forrepresentation only. Actual model may differin appearance.”
SAFETY SECTIONIImmppoorrttaanntt — This document contains serviceinformation. This is customer property and is to remainwith this unit. Please return to service information packupon completion of work.
Table 3. Suggested Locations for Best Reliability (continued)
• A 36” minimum clearance is required on the line voltage electricalservice side access panel to any wall or obstruction.
• For ease of service maintenance, provide 24” clearance in front ofthe control box (access panel) and any other side requiringservice.
Table 4. Cold Climate Considerations
Note: It is recommended that these precautions be taken for unitsbeing installed in areas where snow accumulation andprolonged below-freezing temperatures occur.
• Units should be elevated 3–12 inches above the pad or rooftop,depending on local weather. This additional height will allowdrainage of snow and ice melted during defrost cycle prior to itsrefreezing. Ensure that drain holes in unit base pan are notobstructed, preventing drainage of defrost water.
• If possible, avoid locations that are likely to accumulate snowdrifts. If not possible, a snow drift barrier should be installedaround the unit to prevent a build-up of snow on the sides of theunit.
Table 6. Refrigerant Line and Service Valve Connection Sizes
Rated Line Sizes Service Valve Connection Sizes
Model Vapor Line Liquid Line Vapor Line Connection Liquid Line Connection
4A7L6018A1 3/4 3/8 3/4 3/8
4A7L6024A1 3/4 3/8 3/4 3/8
4A7L6030A1 3/4 3/8 3/4 3/8
4A7L6036A1 3/4 3/8 7/8 3/8
4A7L6042A1 7/8 3/8 7/8 3/8
4A7L6048A1 7/8 3/8 7/8 3/8
4A7L6060A1 1–1/8 3/8 7/8 3/8
Table 7. Factory Charge
These outdoor condensing units are factory charged with the system charge required for the outdoor condensing unit, fifteen (15) feet of testedconnecting line, and the smallest indoor evaporative coil match. See unit nameplate. If connecting line length exceeds fifteen (15) feetand/or a larger indoor evaporative coil is installed, then final refrigerant charge adjustment is necessary. Use the Subcoolingcharging procedure found in the outdoor unit Service Facts. Charge level can always be verified with the Refrigerant Charging Chart found in theService Facts.
Table 8. Required Refrigerant Line Length
Determine required line length and lift. You will need this todetermine the subcooling charging corrections later in theinstallation process.
Total Line Length = ___________________________Ft.
Total Vertical Change (lift) = ____________________Ft.
Important: The Vapor Line must always be insulated. DO NOTallow the Liquid Line and Vapor Line to come in direct(metal to metal) contact.
Note: The gas line must always be insulated. Insulating the liquidline through attic spaces may benefit system performance byminimizing heat gain in the liquid line.
Secure Vapor Line from joists using isolators every 8 ft. Secure Liquid Line directly to insulated Vapor Line using tape, wire, or other appropriatemethod every 8 ft.
Table 13. Isolation In Wall Spaces
Secure Vapor Line from joists using isolators every 8 ft. Secure Liquid Line directly to insulated Vapor Line using tape, wire, or other appropriatemethod every 8 ft.
4. Wrap a wet rag around the valve body to avoid heat damage andcontinue the dry nitrogen purge.
5. Braze the refrigerant lines to the service valves.
a. For Units shipped with a field-installed external drier, checkliquid line filter drier’s directional flow arrow to confirmcorrect direction of refrigeration flow (away from outdoor unitand toward evaporator coil) as illustrated. Braze the filterdrier to the Liquid Line.
6. Continue the dry nitrogen purge. Do not remove the wet rag untilall brazing is completed.
Important: Remove the wet rag before stopping the dry nitrogenpurge.
Note: Precautions should be taken to avoid heat damage to base panduring brazing. It is recommended to keep the flame directlyoff of the base pan.
7. Replace the pressure tap valve cores after the service valves havecooled.
Important: Leak check and evacuation must be completed beforeopening the service valves.
4. Remove service valve cap.
5. Fully insert 3/16” hex wrench into the stem and back outcounterclockwise until valve stem just touches the rolled edge(approximately five (5) turns).
6. Replace the valve cap to prevent leaks. Tighten finger tightplus an additional 1/6 turn.
16 11-AC40D1-1B-EN
Electrical — Low VoltageTable 19. Low Voltage MaximumWire Length
The table defines the maximum total length of low voltage wiringfrom the outdoor unit, to the indoor unit, and to the thermostat.
24 VOLTS
WIRE SIZE MAX. WIRE LENGTH
18 AWG 150 Ft
16 AWG 225 Ft.
14 AWG 300 Ft.
NNoottee:: The use of color coded low voltage wire isrecommended to simplify connections betweenthe outdoor unit, the control, and the indoor unit.
Electrical — High VoltageTable 20. High Voltage Power Supply
Install a separate disconnect switch at the outdoor unit.
For high voltage connections, flexible electrical conduit isrecommended whenever vibration transmission may create a noiseproblem within the structure.
11-AC40D1-1B-EN 17
Table 22. High Voltage Disconnect Switch
Ground the outdoor unit per national, state, and local coderequirements.
Low Voltage Hook-up Diagrams
EElleeccttrriiccaall —— LLooww VVoollttaaggee
18 11-AC40D1-1B-EN
System Start Up1. Set the system thermostat to OFF.
2. Turn on electrical power disconnect(s) to apply power to theindoor and outdoor units.
3. Wait one (1) hour before starting the unit if compressor crankcaseheater accessory is used and the Outdoor Ambient is below 70°F.
60 MIN.
4. Set the system thermostat to ON.
EElleeccttrriiccaall —— LLooww VVoollttaaggee
11-AC40D1-1B-EN 19
Subcooling Charging in Cooling between 55°° F and 120°°OD Ambient
American Standard has always recommendedinstalling American Standard approved matchedindoor and outdoor systems.
All American Standard split systems are AHRI ratedwith only TXV/EEV indoor systems.
The benefits of installing approved indoor and outdoorsplit systems are maximum efficiency, optimumperformance and the best overall reliability.
The following charging methods are thereforeprescribed for matched systems with indoor TXV/EEVs.
1. Subcooling (in the cooling mode) is the onlyrecommended method of charging above 55°ambient temperatures.
2. For best results — the indoor temperature shouldbe kept between 70° to 80° F. Add system heat ifneeded.
3. At startup, or whenever charge is removed oradded, the system must be operated for a minimum
of (20) minutes to stabilize before accuratemeasurements can be made.
4. Measure Liquid Line Temperature and RefrigerantPressure at service valves.
5. Determine total refrigerant line length, and height(lift) if indoor section is above the condenser.
6. Determine the Design Subcooling ChargingTemperature from the unit nameplate.
7. Locate this value in the appropriate column of theSubcooling Charging Table. Locate your liquid linetemperature in the left column of the table, and theintersecting liquid line pressure under yournameplate subcool value column. Add refrigerantto raise the pressure to match the table, or removerefrigerant to lower the pressure. Again, wait (20)minutes for the system conditions to stabilizebefore adjusting charge again.
8. When system is correctly charged, you can refer toSystem Pressure Curves to verify typicalperformance.
20 11-AC40D1-1B-EN
System Charge Adjustment
Table 23. Temperature Measurements
Check the outdoor temperatures.
Subcooling using “Charging Mode-Cooling” is the onlyrecommended method of charging between 55 ° F and 120° F ambientoutdoor temperature.
For best results the indoor temperature should be kept between 70° Fto 80° F.
Table 24. Subcooling Charging Corrections
Determine the final subcooling value using total Line Length and Lift —See Required Refrigerant Line Length and the Subcooling ChargingCorrections Charts.
Subcooling Charging CorrectionWorksheet
Total Line Length (ft) ________________________
Total Vertical Charge (lift) ________________________(Values from— Required Refrigerant Line Length)
Design Subcooling Value ________________________(from nameplate)
Final Subcooling Value ________________________
11-AC40D1-1B-EN 21
Refrigerant Charging Chart
R-410A REFRIGERANT CHARGING CHART
LIQUIDTEMP(°F)
DESIGN SUBCOOLING (°F)
8 9 10 11 12 13 14
LIQUID GAGE PRESSURE (PSI)
55 179 182 185 188 191 195 198
60 195 198 201 204 208 211 215
65 211 215 218 222 225 229 232
70 229 232 236 240 243 247 251
75 247 251 255 259 263 267 271
80 267 271 275 279 283 287 291
85 287 291 296 300 304 309 313
90 309 313 318 322 327 331 336
95 331 336 341 346 351 355 360
100 355 360 365 370 376 381 386
105 381 386 391 396 402 407 413
110 407 413 418 424 429 435 441
115 435 441 446 452 458 464 470
120 464 470 476 482 488 495 501
125 495 501 507 514 520 527 533
22 11-AC40D1-1B-EN
Subcool Charging Charts
1.5 Ton Models
50 4°
40
30 1°
25 Use Design Subcooling 1°
15
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150
Add 1°
Add 1°
Add 1°
Add 2°
REFRIG
ERANT L
INE L
IFT (FT) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
2.0 Ton Models
50 1°
40
30
25 Use Design Subcooling15
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150
Add 1°
Add 1°
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
Add 2°
REFRIG
ERANT L
INE L
IFT (FT)
2.5 Ton Models
50 1°
40
30
25 Use Design Subcooling15 1°
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150
Add 1°
REFRIG
ERANT L
INE L
IFT (FT) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
Add 2°
Add 1°
3.0 Ton Models
50 4°
40
30
25 Use Design Subcooling15 1°
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150
Add 1°
Add 2°
REFRIG
ERANT L
INE L
IFT (FT) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
Add 1°
3.5 Ton Models
50
40
30
25 Use Design Subcooling15
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150
Add 1°
Add 1°
Add 1°
Add 2°
Add 4°
RE
FR
IGE
RA
NT
LIN
E L
IFT
(F
T) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
4.0 Ton Models
50 1°
40 1°
30
25 Use Design Subcooling15
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150RE
FR
IGE
RA
NT
LIN
E L
IFT
(F
T) SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
Add 4°
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
Final Subcooling Value = ________________________ °F
Table 27. Proper Gage Pressure
Using the “Refrigerant Charging Chart,” p. 21adjust refrigerant levelto attain proper gage pressure.
Add refrigerant if the Liquid Gage Pressure is lower than the chartvalue.4. Connect gauges to refrigerant bottle and unit as illustrated.5. Purge all hoses.6. Open bottle.7. 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 thanthe chart value.
24 11-AC40D1-1B-EN
Table 28. System Information
8. Record system pressures and temperatures after charging iscomplete.
Jumper R to Y lowvoltage terminalsat thermostat sub
base.
Does thecontactor energize?
Replace the roomthermostat
Repair or replacetransformer or fuse.Investigate cause for
failure (possible short in field wiring)
Repair or replaceconnecting wiring
NO
Check ID Lowvoltage
transformer
YES
Wait 3 minutes andcheck contactor
coil again
26 11-AC40D1-1B-EN
Troubleshooting
TTrroouubblleesshhoooottiinngg
11-AC40D1-1B-EN 27
NNootteess
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