Carrier 48TC*D08 - User Manual

48TC*D08---D14
Nominal 7.5 to 12.5 Tons
Wi t h Pu ro n (R---410A) Refrigerant
Service and Maintenance Instructions
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 1....................
UNIT ARRANGEMENT AND ACCESS 2...........
SUPPLY FAN (BLOWER) SECTION 4..............
COOLING 6....................................
PURONR (R--410A) REFRIGERANT 8..............
COOLING CHARGING CHARTS 10................
CONVENIENCE OUTLETS 16....................
SMOKE DETECTORS 17.........................
PROTECTIVE DEVICES 24.......................
GAS HEATING SYSTEM 25......................
CONDENSER COIL SERVICE 35..................
PREMIERLINKt CONTROL 36...................
RTU--MP CONTROL SYSTEM 44..................
ECONOMI$ER SYSTEMS 57......................
WIRING DIAGRAMS 66.........................
PRE--START--UP 69..............................
START--UP, GENERAL 69........................
START--UP, PREMIERLINK CONTROL 71..........
START--UP, RTU--MP CONTROL 71................
OPERATING SEQUENCES 75.....................
FASTENER TORQUE VALUES 85.................
APPENDIX I. MODEL NUMBER SIGNIFICANCE 87.
APPENDIX II. PHYSICAL DATA 88................
APPENDIX III. FAN PERFORMANCE 90...........
APPENDIX IV. WIRING DIAGRAM LIST 96........
APPENDIX V. MOTORMASTER SENSOR
LOCATIONS 97.................................
UNIT ST ART-UP CHECKLIST 98..................
SAFETY CONSIDERATIONS
Installation and servici ng of air-conditioning equipment
can be hazardous due to system pressure and electrical
compone nts. Only trained and qualifi ed 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 operati ons.
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 glasse s and work
gloves. Use quenching cloth for unbrazing operations.
Have fire extinguishers avail able for all brazing
operations.
Follow all safety codes. Wear safety glasse s and work
gloves. Use quenching cloth for brazi ng operat ions. Have
fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attache d 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 this 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 i njury or death.
WARNING signifies a hazard which could result in
personal injury or de ath. CAUTION is used to identify
unsafe practices which may result in minor personal
injury or product and property da mage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.

Summary

SAFETY CONSIDERATIONS

SUPPLY FAN (BLOWER) SECTION

COOLING

PURON (R-410 A) REFRIGERANT

Refrigerant Charge

Guidance on determining the correct refrigerant charge amount and procedures.

Table 1 - Cooling Service Analysis

Compressors

CONVENIENCE OUTLETS

SMOKE DETECTORS

Sensor and Controller Tests

INDICATORS

Resetting Alarm and Trouble Condition Trips

Procedures for manually resetting alarm and trouble conditions.

PROTECTIVE DEVICES

Compressor Protection

Details on overcurrent and overtemperature protection for compressors.

GAS HEATING SYSTEM

General

Burners and Igniters

Burner Ignition

Burner Ignition

Orifice Replacement

Troubleshooting Heating System

Table 14 - IGC Board LED Alarm Codes

CONDENSER COIL SERVICE

PREMIERLINK CONTROL

Economizer controls

Outdoor Air Enthalpy Control

Differential Enthalpy Control

Smoke Detector;Fire Shutdown (FSD)

Communication Wiring - Protocols

CCN Communication Bus

RTU-MP CONTROL SYSTEM

RTU-MP Multi-Protocol Control Board

Outdoor air management functions

Space Temperature (SPT) Sensors

RTU-MP Troubleshooting

Table 23 - Troubleshooting Alarms

Alarms

Safety Chain Alarm

Fire Shutdown Alarm

Space Temp Sensor Failure

ECONOMISER SYSTEMS

EconoMi$er IV Control Modes

Outdoor Dry Bulb Changeover

Demand Control Ventilation (DCV)

PRE-START-UP

PERSONAL INJURY HAZARD

Safety precautions related to handling refrigerant systems and components.

ELECTRICAL OPERATION HAZARD

Warnings regarding electrical safety and grounding requirements.

START-UP, GENERAL

Cooling

PREMIERLINK CONTROLS

START-UP, PREMIERLINK CONTROLS

Procedures for using Carrier software to start up and configure the controller.

START-UP, RTU-MP CONTROL

Guidance on starting up the RTU-MP control system.

Field Service Test

Configuration

Economizer

OPERATING SEQUENCES

Cooling, Units Without Economizer

Heating, Units Without Economizer

Cooling, Unit With EconoMi$er IV

Operational sequence for cooling with an EconoMi$er IV.

PremierLink Control

Cooling

Heating

Indoor Air Quality

IAQ Pre-Occupancy Purge

Unoccupied Free Cooling

Operation of free cooling during unoccupied periods.

PremierLink controller Sequence of Operation

Scheduling

How scheduling is used to start heating/cooling based on time periods.

Local Schedule

APPENDIX III. FAN PERFORMANCE

APPENDIX III. FAN PERFORMANCE (cont.)

ELECTRICAL INFORMATION

MCA;MOCP DETERMINATION

UNIT START-UP CHECKLIST

PRE-START-UP

Essential pre-start-up checks and verifications before powering the unit.

START-UP

Procedures for electrical, temperature, and pressure checks during start-up.

Carrier 48TC*D08 Specifications

General

Model	48TC*D08
Energy Efficiency Ratio (EER)	Up to 11.0
Refrigerant	R-410A
Voltage	208/230V
Phase	3
Compressor Type	Scroll
Stages	Single-stage
SEER	Up to 14.0
HSPF	Not Applicable
Heating Capacity	Not Applicable
Seasonal Energy Efficiency Ratio (SEER)	Up to 14.0
Type	Air Conditioner
Cooling Capacity	8.0 Tons