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38AU appendix Front, Left, Back, Right, Top Brackets, Bottom, C10367
Models:
38AU
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52
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Troubleshooting
Install
38AUZ*16 Charging Chart Novation
Dimension
Maintenance
Power Wiring Connections
Comfort Alert Diagnostic Module
Typical Piping Connection Assembly
Adjust Refrigerant Charge
Unbalanced 3-PhaseSupply Voltage
Page 52
Image 52
38AU
TOP BRACKETS
52
FRONT
BOTTOM
BRACKET
LEFT
BACK
RIGHT
C10367
Fig. 48 - Wind Baffle Installation — 15 Ton Units
Page 51
Page 53
Page 52
Image 52
Page 51
Page 53
Contents
CONTENTS
Installation, Start---Upand Service Instructions
38AU Air Cooled Condensing Units 60 Hz
With PuronR R---410ARefrigerant Sizes
SAFETY CONSIDERATIONS
INSTALLATION GUIDELINE
Replacement/Retrofit - R-22to PuronR
UNIT OPERATION AND SAFETY HAZARD
UNIT DAMAGE HAZARD
Installation
38AU
Fig. 1 - 38AU**16 Unit Dimensions
38AU
Fig. 2 - 38AU**25 Unit Dimensions
38AU
UNIT
38AUZ*25
38AU
UNIT SIZE 38AU
38AU
UNIT SIZE 38AU
38AU
UNIT SIZE 38AU
38AU
UNIT SIZE 38AU
3 8 A U Z A 2 5 A 0 G 6 A 0 A 0 A
Fig. 3 - Model Number Nomenclature
Fig. 4 - Serial Number Nomenclature
38AU
INSTALLATION
Step 2 - Complete Pre-InstallationChecks
Fig. 5 - Service Clearance Dimensional Drawing
Matching 38AU Model To Evaporator Coil
Provide Safety Relief
Step 3 - Prepare Unit Mounting Support
Step 4 - Rig and Mount the Unit
Step 5 - Complete Refrigerant Piping Connections
Liquid Lift
Suction Riser
38AU
Model
Insulate Suction Lines
Hot Gas Bypass
38AUD Piping Connections
38AU
Fig. 6 - 38AUD Service Valve Locations
Install Filter Driers and Moisture Indicators
Fig. 7 - Typical Evaporator Coil Connections 40RU
Puron-dutyFilter Driers
Install Liquid Line Solenoid Valve
Typical 38AUZ Systems
Typical 38AUD Systems
Capacity Control Liquid Line Solenoid Valve
Step 6 - Install Accessories
Fig. 10 - Typical Piping Connection Assembly
Evacuation/Dehydration
Preliminary Charge
Field Power Supply
Fig. 11 - Disconnect Switch and Unit
Units Without Factory-InstalledDisconnect
Units with Factory-InstalledDisconnect
Fig. 12 - Power Wiring Connections
Fig. 14 - Powered Convenience Outlet Wiring
Convenience Outlets
ELECTRICAL OPERATION HAZARD
Fig. 16 - Weatherproof Cover Installation
Field Control Wiring
Convenience Outlet Utilization
38AU
38AUD Control Circuit Wiring
Control Transformer Wiring
Fig. 19 - Control Transformer Wiring
Thermostat
38AU
5.Unbalanced 3-PhaseSupply Voltage
Legend and Notes for Table
To correct phase order
PRE-START-UP
START-UP
System Check
Advanced Scroll Temperature Protection ASTP
Adjust Refrigerant Charge
Using plotted operating point
Start Unit
Fig. 23 - 38AUZ*16 Charging Chart Novation
38AUZ*25 Check Compressor Oil Level
Fig. 22 - Recommended Oil Level - 38AUZ*25
Final Checks
Fig. 24 - 38AUD*16 Charging Chart Novation
38AU
CIRCUIT
CIRCUIT
Fig. 25 - 38AUZ*16 Charging Chart RTPF
Fig. 26 - 38AUZ*25 Charging Chart RTPF
38AU
C10947
38AU
Fig. 27 - 38AUD*16 Charging Chart RTPF
C10949
38AU
Fig. 28 - 38AUD*25 Charging Chart RTPF
C10950
38AU
C10212A
38AU
C10213A
OPERATING SEQUENCE
Base Unit Controls
Indoor Supply Fan
Cooling, Unit Without Economizer
ROUTINE SYSTEM MAINTENANCE
SERVICE
Seasonal Maintenance
Synthetic Roof Precautionary Procedure
Field Refrigerant Access Ports
Factory High-FlowAccess Ports
Fig. 31 - CoreMax Access Port Assembly
SEAT
Fig. 32 - CADM Housing/LED Locations
Comfort Alert Diagnostic Module
38AU
Table 11 - LED Status Codes
Status LED Troubleshooting Information
38AU
Status LED
Table 12 - CADM Troubleshooting
Compressor Overtemperature Protection IP
Low-PressureSwitch
High-PressureSwitch
Condenser Fans/Motors Access Panel Control Box
Compressors Service Valves
Fig. 34 - 38AUD Size 16 Cabinet
Fig. 35 - 38AUD*16 Piping
Fig. 36 - 38AUZ*16 Compressor Assembly Rear View
Fig. 37 - 38AUD*16 Compressor Assembly Rear View
Equalization LPS
Oil Equalizer Line
Fig. 38 - 38AUZ,D Size 25 Cabinet
Fig. 39 - 38AUD*25 Piping
Condenser Fans/Motors Access Panel Control Box
Compressors Service Valves
Fig. 40 - 38AUZ*25 Compressor Assembly Rear View
Fig. 41 - 38AUD*25 Compressor Assembly Rear View
38AU
C10215
NOVATION Coil Cleaning and Maintenance
Repairing NOVATION Condenser Tube Leaks
Coil Type Identification
NOVATIONt Type
Replacing NOVATIONt Condenser Coil
UNIT RELIABILITY HAZARD
UNIT DAMAGE HAZARD
38AU
TROUBLESHOOTING
FASTENER TORQUE VALUES
Table 13 - Torque Values
38AU
TROUBLESHOOTING cont
38AU
Wiring Diagram List
APPENDIX A
APPENDIX B
Air Conditioner & Heat Pump with PURON→
Low Ambient Option - Factory Installed
Troubleshooting
APPENDIX C
Operation
Fig. 44 - Motormaster Sensor Location
Fig. 45 - Motormaster Sensor Location
38AUZ*16 & 38AUD*16 Novation
38AUZ*16/25 & 38AUD*16/25 RTPF
Table 14 - Wind Baffle Dimension
38AU
38AU
Fig. 46 - Wind Baffles - Fabrication
C10363A
38AU
C10366
Fig. 48 - Wind Baffle Installation - 15 Ton Units
FRONT
LEFT
BACK
Fig. 49 - Wind Baffle Installation - 20 Ton Units
FRONT
BACK
LEFT
38AU
Catalog No 38AU---09SI
Edition Date 11/10
Replaces 38AU---07SI
START-UPCHECKLIST
I. PRELIMINARY INFORMATION
II. PRE-START-UP
OUTDOOR UNIT
CHECK VOLTAGE IMBALANCE
38AU