38AUZD/E
Air Cooled Condensing Units, 60 Hz
Single Circuit, 2---Stage with Digital Scroll Compressor
and Puron
R
(R ---410A) Refrigerant
Size 08
Installation, Start---Up
and Service Instructions
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 2....................
Rated Indoor Airflow (cfm) 3.....................
Matching 38AUZD/E08 Model to Evaporator Coil 6...
INSTALLATION 6--16...........................
Jobsite Survey 6................................
Step 1 -- Plan for Unit Location 6..................
Step 2 -- Complete Pre--Installation Checks 6.........
Step 3 -- Prepare Unit Mounting Support 6...........
Step 4 -- Rig and Mount the Unit 6.................
Step 5 -- Determine Refrigerant Line Sizes 7.........
Step 6 -- Complete Refrigerant Piping Connections 8....
Step 7 -- Install Accessories 10....................
Step 8 -- Complete Electrical Connections 10.........
Step 9 -- Wind Baffles for Low Ambient Controls 16...
PRE-START-UP 16...............................
System Check 16...............................
Turn On Crankcase Heater 16.....................
Preliminary Charge 16...........................
START--UP 16 -- 19..............................
Preliminary Checks 16...........................
Start Unit 17...................................
OPERATING SEQUENCE 20......................
Base Unit Controls 20...........................
Indoor (Supply) Fan 20..........................
Cooling, Unit Without Economizer 20..............
Cooling, Unit with Economizer 20.................
Heating 20....................................
ROUTINE SYSTEM MAINTENANCE 20............
Quar ter ly Insp ection (and 30 day s after initial start) 20...
Seasonal Maintenance 20........................
SERVICE 21 -- 27................................
Refrigeration System 21.........................
Compressor Oil 21..............................
Servicing Systems on Roofs with
Synthetic Materials 21...........................
Liquid Line Filter Drier 21.......................
Filed Refrigerant Access Ports 21..................
Factory High-- Flow Access Ports 21................
Comfort Alert Diagnosti c Module 22...............
Compressor Protection 24........................
Crankcase Heater 24............................
Low--Pressure Switch 24.........................
High--Pressure Switch 24.........................
Outdoor Fans 24................................
Lubrication 24.................................
Routine Cleaning of Round-Tube Plate Fin
(RTPF) Coils 26................................
Fastener Torque Values 27........................
TROUBLESHOOTING 27 -- 28.....................
APPENDIX A
Air Conditioner & Heat Pump with Puron
R
—
Quick Reference Guide 29.........................
APPENDIX B
Wiring Diagram List 29...........................
APPENDIX C
Low Ambient Option — Factory Installed 29..........
START--UP CHECKLIST 35 -- 36...................
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