Carrier 50KC04-06 Service And Maintenance Instructions

Service and Maintenance Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1
UNIT ARRANGEMENT AND ACCESS. . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Seasonal Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . 3
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . 4
Supply Fan (Belt-Drive) . . . . . . . . . . . . . . . . . . . . . . . . 4
COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Condenser Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Condenser Coil Maintenance and Cleaning
Recommendation. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Refrigerant System Pressure Access Ports . . . . . . 10
PURON® (R-410A) REFRIGERANT. . . . . . . . . . . . . . 11
Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Condenser Fan Adjustment . . . . . . . . . . . . . . . . . . . 17
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . . 18
Non-Powered Type. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Unit-Powered Type. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Duty Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Fuse on Powered Type . . . . . . . . . . . . . . . . . . . . . . . 19
Using Unit-mounted Convenience Outlets . . . . . . . 19
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . . 19
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Smoke Detector Locations . . . . . . . . . . . . . . . . . . . . 20
Completing Installation of Return Air Smoke
Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
FIOP Smoke Detector Wiring and Response. . . . . . 21
Sensor and Controller Tests . . . . . . . . . . . . . . . . . . . 22
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . . 25
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . 25
Relief Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Control Circuit, 24-v . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ELECTRIC HEATERS . . . . . . . . . . . . . . . . . . . . . . . . . 25
Single Point Boxes and Supplementary Fuses . . . . 26
Completing Heater Installation . . . . . . . . . . . . . . . . . 27
PREMIERLINK™ CONTROLLER (FACTORY
OPTION) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
RTU-OPEN CONTROL SYSTEM . . . . . . . . . . . . . . . . 27
ECONOMIZER SYSTEMS. . . . . . . . . . . . . . . . . . . . . . 28
EconoMi$er IV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Economi$er® X (Factory Option) . . . . . . . . . . . . . . . 38
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500223-01
Electric Cooling Units with Optional Electric Heat
Printed in U.S.A. Form 50KC-4-6-01SM
Single Package Rooftop
with Puron ®
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
START-UP, GENERAL . . . . . . . . . . . . . . . . . . . . . . . .52
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Outdoor-Air Inlet Screens . . . . . . . . . . . . . . . . . . . . .52
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . .52
Internal Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Refrigerant Service Ports. . . . . . . . . . . . . . . . . . . . . .52
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . .52
Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Ventilation (Continuous Fan). . . . . . . . . . . . . . . . . . .53
START-UP, PREMIERLINK CONTROLS . . . . . . . . . .53
START-UP, RTU-OPEN CONTROL . . . . . . . . . . . . . .53
OPERATING SEQUENCE . . . . . . . . . . . . . . . . . . . . . .53
Base Unit Controls . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Cooling - Units without Economizer . . . . . . . . . . . . .53
Heating - Units without Economizer . . . . . . . . . . . . .53
Cooling, Unit with EconoMi$er IV . . . . . . . . . . . . . . .53
Heating, Unit with EconoMi$er IV . . . . . . . . . . . . . . .53
Demand Controlled Ventilation . . . . . . . . . . . . . . . . .53
FASTENER TORQUE VALUES. . . . . . . . . . . . . . . . . .54
APPENDIX A - MODEL NUMBER SIGNIFICANCE .55
APPENDIX B - PHYSICAL DATA . . . . . . . . . . . . . . .57
APPENDIX C - FAN PERFORMANCE . . . . . . . . . . .59
APPENDIX D - ELECTRICAL DATA. . . . . . . . . . . . .67
APPENDIX E - WIRING DIAGRAMS. . . . . . . . . . . . .75
APPENDIX F - MOTORMASTER SENSOR
LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1

SAFETY CONSIDERATIONS

Improper installation,
maintenance, or use can cause explosion, fire, electrical shock
or other conditions which may cause personal injury or
property damage. Consult a qualified installer, service agency,
or your distributor or branch for information or assistance. The
qualified installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the
individual instructions packaged with the kits or accessories
when installing.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloths for brazing operations and have a fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult
local building codes and appropriate national electrical codes
(in USA, ANSI/NFPA70, National Electrical Code (NEC); in
Canada, CSA C22.1) for special requirements.
It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the unit
and in instructions or manuals, be alert to the potential for
personal injury.
Pg 1
50KC04-06
(R-410A) Refrigerant
adjustment, alteration,
2-19 Replaces: NEW
service,