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50TCA04---A07
Nominal 3 to 6 Tons
Wi t h Pu r on® (R410A) Refrigerant
Service and Maintenance Instructions
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 1....................
UNIT ARRANGEMENT AND ACCESS 2...........
SUPPLY FAN (BLOWER) SECTION 3..............
COOLING 5....................................
PURONR (R--410A) REFRIGERANT 7..............
COOLING CHARGING CHARTS 9.................
CONVENIENCE OUTLETS 13....................
SMOKE DETECTORS 13.........................
DETECTOR CLEANING 18.......................
INDICATORS 19................................
TROUBLESHOOTING 20.........................
PROTECTIVE DEVICES 20.......................
ELECTRIC HEATERS 21.........................
PREMIERLINKT C ONTROL 23...................
ECONOMIZER SYSTEMS 32.....................
FASTENER TORQUE VALUES 50.................
WIRING DIAGRAMS 50.........................
APPENDIX I. MODEL NUMBER SIGNIFICANCE 52.
APPENDIX II. PHYSICAL DATA 53................
APPENDIX III. FAN PERFORMANCE 54...........
APPENDIX IV. ELECTRICAL DATA 63.............
APPENDIX V. WIRING DIAGRAM LIST 69.........
APPENDIX VI. MOTORMASTER SENSOR
LOCATIONS 70.................................
UNIT START- UP CHECKLIST 73..................
SAFETY CONSIDERATIONS
Installation and servicing of a ir-conditioning equipment
can be hazardous due to system pressure and electrical
compone nts. Only trained and qualified service personnel
should install, repair, or service air-conditioning
equipment. Untrained personnel can perform the basic
maintenance functions of replacing filters. Trained service
personnel should perform all other operations.
When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to
the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations.
Have fire extinguishers available for all brazing
operations.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have
fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and National
Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety--alert
symbol
. When you see thi s symbol on the unit and in
instructions or manuals, be alert to the potential for
personal injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety--alert
symbol. DANGER identifies the most serious hazards
which will result in severe personal injury or dea th.
WARNING signifies a hazard which could result in
personal injury or death. CAUTION is used to identify
unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing service or mainte nance operations
on unit, turn off main power switch to unit. Electrical
shock a nd rotating equipment could cause injury.
!
WARNING