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38AU
Air Cooled Condensing Units
60 Hz
With Puron
R
(R---410A) Refrigerant
S i z e s 1 6 --- 2 5
Installation, Start--- Up and
Service Instructions
CONTENTS
SAFETY CONSIDERATIONS 2....................
INSTALLATION GUIDELINES 2..................
Replacement/Retrofit — R--22 to Puron 2...........
INSTALLATION 11 - 22.........................
Jobsite Survey 11...............................
Step 1 -- Plan for Unit Location 11.................
Step 2 -- Complete Pre--Installation Checks 11........
Step3–PrepareUnitMounting Support 12..........
Step4–RigandMount the Unit 12................
Step5–CompleteRefrigerantPipingConnections 12...
Step6–InstallAccessories 17....................
Step7–CompleteElectricalConnections 18.........
PRE-START-UP 23...............................
System Check 23...............................
Turn On Crankcase Heater 23.....................
Preliminary Charge 23...........................
START--UP 23 - 31..............................
Preliminary Checks 23...........................
Start Unit 24...................................
OPERATING SEQUENCE 32......................
Indoor (Supply) Fan 32..........................
Cooling, Unit Without Economizer 32..............
Cooling, Unit With Economizer 32.................
Heating 32....................................
ROUTINE SYSTEM MAINTENANCE 33............
Quarterly Inspection (and 30 days after initial start) 33...
Seasonal Maintenance 33........................
SERVICE 33 - 44................................
Refrigeration System 33.........................
Compressor Oil 33..............................
Servicing Systems on Roofs with
Synthetic Materials 33...........................
Liquid Line Filter Drier 34.......................
Field Refrigerant Access Ports 34..................
Factory High--Flow Access Ports 34................
Comfort Alert Diagnostic Module 35...............
Compressor Protection 37........................
Crankcase Heater 37............................
Low--Pressure Switch 37.........................
High--Pressure Switch 37.........................
Outdoor Fans 37................................
Lubrication 37.................................
Coil Type Identification 42.......................
N O VAT I O N tCoil Cleaning and Maintenance 42.....
Repairing NOVATION Condenser Tube Leaks 42.....
Replacing NOVATION Condenser Coil 43...........
Routine Cleaning of Round-Tube Plate Fin
(RTPF) Coils 43................................
Fastener Torque Values 44........................
TROUBLESHOOTING 44 -- 45.....................
APPENDIX A
Air Conditioner & Heat Pump with Puron
R
—
Quick Reference Guide 46.........................
APPENDIX B
Wiring Diagram List 46...........................
APPENDIX C
Low Ambient Option — Factory Installed 47..........
START--UP CHECKLIST 55 -- 56...................