American Standard 5A6H7024A1000A Manual
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American Standard 5A6H7024A1000A Manual

American Standard 5A6H7024A1000A Manual

Heat pumps and air conditioners
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Service Facts
American Standard Multi-Speed
Heat Pumps and Air Conditioners
5A6H7024A1000A
5A6H7036A1000A
5A6H7048A1000A
5A6H7060A1000A
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.
Sept 2024
5A7A7024A1000A
5A7A7036A1000A
5A7A7048A1000A
5A7A7060A1000A
S S A A F F E E T T Y Y W W A A R R N N I I N N G G
5A-70-SF-1A-EN
N N o o t t e e : : "Graphics in this document are for representation
only. Actual model may differ in appearance."

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Summary of Contents for American Standard 5A6H7024A1000A

  • Page 1 Service Facts American Standard Multi-Speed Heat Pumps and Air Conditioners 5A6H7024A1000A 5A7A7024A1000A 5A6H7036A1000A 5A7A7036A1000A 5A6H7048A1000A 5A7A7048A1000A 5A6H7060A1000A 5A7A7060A1000A N N o o t t e e : : “Graphics in this document are for representation only. Actual model may differ in appearance.”...

  • Page 2: Safety Section

    . . ©2024 American Standard...
  • Page 3 S S A A F F E E T T Y Y S S E E C C T T I I O O N N W W A A R R N N I I N N G G N N o o t t e e : : See AHRI directory for approved indoor and outdoor model combinations.
  • Page 4 S S A A F F E E T T Y Y S S E E C C T T I I O O N N I I m m p p o o r r t t a a n n t t : : Use caution when cleaning outdoor coil to compartment and drive damaging the ensure no water enters the electrical electronics.

  • Page 5: Product Specifications

    Product Specifications Heat Pump Models OUTDOOR UNIT (a) (b) 5A6H7024A 5A6H7036A 5A6H7048A 5A6H7060A POWER CONNS. – V/PH/HZ 208/230/1/60 208/230/1/60 208/230/1/60 208/230/1/60 MIN. BRCH. CIR. AMPACITY 19.0 27.0 36.0 43.0 BR. CIR. PROT. RTG. – MAX. (AMPS) SCROLL SCROLL SCROLL SCROLL COMPRESSOR 1–MULTI 1–MULTI...
  • Page 6 P P r r o o d d u u c c t t S S p p e e c c i i f f i i c c a a t t i i o o n n s s Air Conditioner Models OUTDOOR UNIT (a) (b)
  • Page 7 Charging in Cooling between 55° F and 120° OD Ambient American Standard has always recommended installing 6. Run the system in cooling mode with a Y2 call. American Standard approved matched indoor and Measure Liquid Line Temperature and Refrigerant outdoor systems.

  • Page 8: Subcool Charging Correction Charts

    Subcool Charging Correction Charts Figure 1. Subcool Charging Corrections – 2.0 Ton 2.0 TON SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) - 5/16" LINE SET DIAMETER Use Design Subcooling TOTAL REFRIGERANT LINE LENGTH (FEET) Figure 2. Subcool Charging Corrections – 3.0 Ton 3.0 TON SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE) - 5/16"...
  • Page 9 S S u u b b c c o o o o l l C C h h a a r r g g i i n n g g C C o o r r r r e e c c t t i i o o n n C C h h a a r r t t s s R-454B Refrigerant Charging Chart DESIGN SUBCOOLING (F) LIQUID TEMP...
  • Page 10 Wiring 5A-70-SF-1A-EN...

  • Page 11: Electrical - High Voltage

    Electrical – High Voltage Table 2. High Voltage Power Supply W W A A R R N N I I N N G G L L I I V V E E E E L L E E C C T T R R I I C C A A L L C C O O M M P P O O N N E E N N T T S S ! ! F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w t t h h i i s s W W a a r r n n i i n n g g c c o o u u l l d d r r e e s s u u l l t t i i n n p p r r o o p p e e r r t t y y d d a a m m a a g g e e , , s s e e v v e e r r e e p p e e r r s s o o n n a a l l i i n n j j u u r r y y , , o o r r d d e e a a t t h h .
  • Page 12 If multiple faults are present, the 7-segment LED displays will cycle through the faults. • The digital display also offers a diagnostics mode to cycle through historical faults. American Standard Multi-Speed Status/Fault List Value 1st Digit - Status 2nd Digit - Faults...
  • Page 13 Integrated Multi-Speed Control Board Sump Heat Control Sump Heat Control Guidelines When outdoor temperature is below 50 ° F and compressor dome temperature is less than the outdoor ambient temperature Sump Heat ON When the outdoor temperature goes above software-specified limit ° F Sump Heat Anytime the compressor is running For 50 minutes after each compressor run cycle.

  • Page 14: Sequence Of Operation

    Sequence of Operation Heat Pump Cooling Mode of Operation C C o o n n t t r r o o l l O O p p e e r r a a t t i i o o n n a a l l O O v v e e r r v v i i e e w w In addition to stage and demand operating sequences Operation of the multi- speed outdoor unit is managed outlined in the Cooling Mode description, when a heat...
  • Page 15 S S e e q q u u e e n n c c e e o o f f O O p p e e r r a a t t i i o o n n Heat Pump Heating Defrost Mode •...
  • Page 16 S S e e q q u u e e n n c c e e o o f f O O p p e e r r a a t t i i o o n n with leak-free disconnect couplings and in good •...

  • Page 17: Defrost Control (Heat Pump Only)

    Defrost Control (Heat Pump only) Defrost Initiation D D e e m m a a n n d d D D e e f f r r o o s s t t The calculated temperature difference between the The demand defrost control measures heat pump outdoor temperature sensor and the coil temperature outdoor ambient temperature with a sensor located sensor is called Delta T.
  • Page 18 SENSORS J22 Compressor Discharge THERMISTOR VOLTS DC RESISTANCE TEMP F TEMP C (PIN TO PIN) Temperature (OHMS) 93.33 0.65 This table shows the corresponding voltage, resistance 96.11 0.61 and temperature readings for the Dome Temperature 98.89 0.57 Sensor when measured across pins J22. The power 101.67 0.53 source for the Dome Temperature Sensor is 3.2VDC.
  • Page 19 S S E E N N S S O O R R S S J21 Ambient Temperature The Ambient Temperature Sensor control has an NTC thermistor input for sensing the outdoor air Sensor (ODS) temperature and has a nominal resistance of ≈ 10k ohms at 75°F.
  • Page 20 S S E E N N S S O O R R S S J23 Coil Temperature Sensor A working Coil Temperature Sensor is required for the following: • Defrost Initiation and Termination THERMISTOR • Compressor Sump Heat (Preheating) RESISTANCE TEMP F TEMP C VOLTS DC...
  • Page 21 Refrigeration Circuits for Heating and Cooling H H e e a a t t i i n n g g M M o o d d e e l l s s Figure 5. 2 Ton and 3 Ton HP (24 and 36 Models) Figure 6.
  • Page 22 R R e e f f r r i i g g e e r r a a t t i i o o n n C C i i r r c c u u i i t t s s f f o o r r H H e e a a t t i i n n g g a a n n d d C C o o o o l l i i n n g g C C o o o o l l i i n n g g M M o o d d e e l l s s Figure 7.

  • Page 23: Communication Loss

    Communication Loss No AOC / MOC (Drive) Lights Unplug each Verify 13.8 VDC sensor, LSOV, Check Line MOC / Drive on Pins 1 & 6 in from the AOC incoming lights on? A0C / MOC and recheck. voltage Harness AOC lights Replace AOC A0C/MOC Harness:...
  • Page 24 Breaker Trip Procedure Breaker Trip Procedure WARNING · Verify wiring · Verify sensor readings · Check breaker 400 VOLTS · Check breaker size ELECTRICAL HAZARD · Check for GFCI on circuit Failure to follow this warning · Replace breaker if necessary could result in personal injury or death.
  • Page 25 Start Compressor Drive Current Failures Any startup failure within 30 seconds of operation B reaker T rip O ccurs Inspect term inal connector to com pressor for open circuits G o to B reaker T rip P rocedure WARNING W as a repair of 400 VOLTS connection required? ELECTRICAL HAZARD...
  • Page 26 Compressor Verification: Parameters Compressor Verification: Parameters Verify PM tonnage matches unit tonnage Does PM match model? Replace PM Verify PM tonnage matches unit tonnage WARNING 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...
  • Page 27 Compressor Verification: Short WARNING Compressor Verification:Short 400 VOLTS ELECTRICAL HAZARD Disconnect compressor wiring Failure to follow this warning harness from drive. could result in personal injury or death. WAIT TWO (2) MINUTES after disconnecting power prior to touching electrical components as they may Review MOC Fault Codes hold a dangerous charge of 400VDC, then verify DC...
  • Page 28 Compressor Verification: Open WARNING Compressor Verification: Open 400 VOLTS ELECTRICAL HAZARD Failure to follow this warning could result in personal injury or death. WAIT TWO (2) MINUTES after disconnecting power Disconnect compressor wire prior to touching electrical For reference: resistance components as they may harness from drive and manually hold a dangerous charge of...
  • Page 29 Inverter Temperature Excessive Inverter Excessive Rectifier Excessive Rectifier Excessive Inverter WARNING Temperature Temperature De-rate Temperature Temperature De-rate Shutdown Shutdown 400 VOLTS ELECTRICAL HAZARD Failure to follow this warning could result in personal injury or death. Check system condition: outdoor temp sensor, suction temp, suction WAIT TWO (2) MINUTES after disconnecting power pressure inverter temp, rectifier...

  • Page 30: Sound Data

    Sound Data Full Octave Sound Power [dB] A-Weighted Speed Sound Power Model Mode 1000 2000 4000 8000 Level [dB(A)] 57.7 59.1 56.8 59.4 53.6 45.1 43.8 Cool 59.5 49.1 70.4 63.7 65.5 68.4 63.4 53.2 49.7 Cool 5A6H7024A 56.7 60.7 58.1 62.8 66.1...

  • Page 31: Pressure Curves

    Pressure Curves Figure 9. 2T HP (024 Models) Heating OUTDOOR TEMPERATURE (Degree F) OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F. TO CHECK COOLING PERFORMANCE, SELECT THE PROPER INDOOR CFM, ALLOW PRESSURES TO STABLIZE. MEASURE INDOOR WET BULB TEMPERATURE, OUTDOOR TEMPERATURE, LIQUID AND SUCTION PRESSURES.
  • Page 32 P P r r e e s s s s u u r r e e C C u u r r v v e e s s Figure 10. 3T HP (036 Models) Heating OUTDOOR TEMPERATURE (Degree F) OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F.
  • Page 33 P P r r e e s s s s u u r r e e C C u u r r v v e e s s Figure 11. 4T HP (048 Models) Heating OUTDOOR TEMPERATURE (Degree F) OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F.
  • Page 34 P P r r e e s s s s u u r r e e C C u u r r v v e e s s Figure 12. 5 Ton HP (060 Models) Heating OUTDOOR TEMPERATURE (Degree F) OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F.
  • Page 35 P P r r e e s s s s u u r r e e C C u u r r v v e e s s Figure 13. 2 Ton AC (024 Models) Cooling OUTDOOR TEMPERATURE (Degree F) OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F.
  • Page 36 P P r r e e s s s s u u r r e e C C u u r r v v e e s s Figure 14. 3 Ton AC (036 Models) Cooling OUTDOOR TEMPERATURE (Degree F) OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F.
  • Page 37 P P r r e e s s s s u u r r e e C C u u r r v v e e s s Figure 15. 4 Ton AC (048 Models) Cooling OUTDOOR TEMPERATURE (Degree F) OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F.
  • Page 38 P P r r e e s s s s u u r r e e C C u u r r v v e e s s Figure 1 . Ton AC ( Models) Cooling OUTDOOR TEMPERATURE (Degree F) OUTDOOR TEMPERATURE (Degree F) COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F.
  • Page 39 Warranty Claim Process Integrated Multi-Speed Control (Drive/MOC) W W h h e e n n a a t t e e c c h h n n i i c c i i a a n n c c a a l l l l s s f f o o r r p p r r e e - - a a u u t t h h o o r r i i z z a a t t i i o o n n Servicing Dealers must obtain a pre-authorization number from a Field Service Representative (FSR) or f f r r o o m m t t h h e e j j o o b b s s i i t t e e : :...
  • Page 40 Notices F F C C C C N N o o t t i i c c e e I I C C N N o o t t i i c c e e Contains FCC ID: WAP3025 Contains IC ID: 7922A-3025 This device complies with part 15 of the FCC Rules.

  • Page 41: Refrigerant Properties

    Refrigerant Properties Refrigerant Properties (continued) Refrigerant Properties Superheat Subcooling Pgauge (psig) Dew Table (°F) Bubble Table (°F) Superheat Subcooling Pgauge (psig) Dew Table (°F) Bubble Table (°F) 5A-70-SF-1A-EN...
  • Page 42 Refrigerant Properties (continued) Refrigerant Properties (continued) Superheat Subcooling Superheat Subcooling Pgauge (psig) Pgauge (psig) Dew Table (°F) Bubble Table (°F) Dew Table (°F) Bubble Table (°F) 5A-70-SF-1A-EN...
  • Page 43 N N o o t t e e s s 5A-70-SF-1A-EN...
  • Page 44 The AHRI Certified mark indicates Manufacturer participation in the AHRI Certification program. For verification of individual certified products, go to ahridirectory.or American Standard has a policy of continuous data improvement and it reserves the right to change design and specifications without notice.

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