Goodmans SSX, GSZ, ASZ, ASX, DSZ, DSX, GSX, SSZ manual Figure a

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PRODUCT DESIGN

The ASX [16 & 18], ASZ [16 & 18], DSX16 and DSZ16 series split system units use a two-stage scroll compressor. The two-step modulator has an internal unloading mechanism that opens a bypass port in the first compression pocket, effectively reducing the displacement of the scroll. The opening and closing of the bypass port is controlled by an internal electrically operated solenoid.

The ZPS/ZRS two-step modulated scroll uses a single step of unloading to go from full capacity to approximately 67% capacity. A single speed, high efficiency motor continues to run while the scroll modulates between the two capacity steps.

FIGURE A

A scroll is an involute spiral which, when matched with a mating scroll form as shown, generates a series of crescent shaped gas pockets between the two members.

During compression, one scroll remains stationary (fixed scroll) while the other form (orbiting scroll) is allowed to orbit (but not rotate) around the first form.

As this motion occurs, the pockets between the two forms are slowly pushed to the center of the two scrolls while simultaneously being reduced in volume. When the pocket reaches the center of the scroll form, the gas, which is now at a high pressure, is discharged out of a port located at the center.

During compression, several pockets are being compressed simultaneously, resulting in a very smooth process. Both the suction process (outer portion of the scroll members) and the discharge process (inner portion) are continuous.

Some design characteristics of the Compliant Scroll com- pressor are:

•Compliant Scroll compressors are more tolerant of liquid refrigerant.

NOTE: Even though the compressor section of a Scroll compressor is more tolerant of liquid refrigerant, contin- ued floodback or flooded start conditions may wash oil from the bearing surfaces causing premature bearing failure.

•Compliant Scroll compressors use white oil which is compatible with 3GS. 3GS oil may be used if additional oil is required.

•Compliant scroll compressors perform "quiet" shutdowns that allow the compressor to restart immediately without the need for a time delay. This compressor will restart even if the system has not equalized.

NOTE: Operating pressures and amp draws may differ from standard reciprocating compressors. This informa- tion can be found in the unit's Technical Information Manual.

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Contents Service Instructions Important Information Recognize Safety SYMBOLS, Words and LabelsEmail us at customerservice@goodmanmfg.com Fax us at 713 Fax us at 931 438Safe Refrigerant Handling Product Identification Split System Heat Pumps R410AModel # Description Split System Air Conditioners R410A ASX130**1AA Single Piece Air Handlers AWUF****1AA MBR/MBE Air Handlers Product Identification 1824 3642 Accessories ASX13DSX/SSX16 ASX18 ASZ13 DSZ/SSZ16 ASZ18 Expansion Valve Kits FSK01A Coil Accessories Electric Heat Kitapplications Aruf Electric Heat Kitapplications Aepf Product Design Condensing UnitFigure a Capacity Control Cooling System OperationHeating Cooling CycleDefrost Cycle Heating CycleCooling Cycle System Operation AFE18-60A Control Board DescriptionTroubleshooting Chart COOLING/HP Analysis ChartServicing 61B3A Thermostat and Wiring Checking WiringChecking THERMOSTAT, WIRING, and Anticipator Checking Voltage3B Cooling Anticipator 3C Heating AnticipatorChecking Transformer Control Circuit Checking Time Delay RelayTesting Coil Circuit Checking Cycle ProtectorChecking Contactor AND/OR Relays Testing Compressor ContactorSingle Phase Checking Contactor ContactsCopeland Comfort Alert Diagnostics Testing FAN RelayDiagnostics Table Checking LOW Pressure Control Checking Loss of Charge ProtectorChecking High Pressure Control Checking CapacitorRELAY, Start 15A Resistance Check15B Capacitance Check 16A Checking FAN and Blower Motor Windings PSC Motors 16B Checking FAN and Blower Motor ECM MotorsChart on Next Chart from Previous 16D ECM CFM Adjustments MBE / Aepf 16C Checking ECM Motor WindingsCFM GE X13TM Motor Connections 16E Blower Performance Data16F Checking GE X13TM Motors 17A Resistance Test Testing Compressor WindingsChecking Compressor 17B Ground Test17D Operation Test 17C Unloader Test ProcedureUnloader Test Procedure Compressor Ground TestTesting Defrost Thermostat Testing Crankcase Heater Optional ItemTesting Defrost Control Checking Reversing Valve and SolenoidChecking Heater Elements 40 MBR/AR*F Electronic Blower Time Delay RelayChecking Heater Limit Controls Sequence of OperationMBR/AR*F with Single Stage Heat Pumps Heating OperationMBE/AEPF with Single Stage GSX, ASX and SSX Condensers 41 MBE/AEPF with GSX, SSX, ASX, DSXDefrost Operation 41A MBE/AEPF with Single Stage GSZ, SSZ, & ASZ Heat Pumps Sequence of Operation MBE/AEPF with TWO Stage ASX & DSX CondensersMBE/AEPF with TWO Stage ASZ & DSZ Heat Pump Units Electric Heater Optional Item Formulas 61A Checking Heater Limit Controls61B Checking Heater Fuse Link Optional Electric Heaters Evacuation Leak Testing Nitrogen or NITROGEN-TRACEDRefrigeration Repair Practice Brazing MaterialsCharging EvacuationFinal Charge Adjustment Checking Compressor Efficiency105B Thermostatic Expansion Valve TXV ValvesPressure vs. Temperature Chart 410A Required Liquid Line Temperature Superheat OverfeedingUnderfeeding Checking SubcoolingFixed Orifice Restrictor Devices 109A TWO Speed ApplicationChecking Expansion Valve Operation Subcooling Formula = Sat. Liquid Temp. Liquid LineNON-CONDENSABLES Checking Restricted Liquid LineOvercharge of Refrigerant Compressor BurnoutLong Line SET Application R-410A Accessories for lines greater than 80 feetRefrigerant Piping Tube SizingInstallation Requirements AIR Handler External Static Initial System ChargingStatic Pressure Drop Coil Static Pressure DropTotal External Static Accessories Wiring Diagrams ALL Fuel System AFE18-60A Control Board10kw and Below, One Stage Electric Heat OT/EHR18-60 #2 GRD PLM PLF XFMR-R XFMR-C After Installing Optional Heat KIT, Mark AN X Provided Above HKR Heat Kit GRD PLM PLF
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