Carrier Streamline Scroll 69NT20-531-300 User Manual

2-10T -309
EVAPORATOR
CONDENSER
TXV
TXV BULB
SMV
COMPRESSOR
COMPRESSOR
OIL SEPARATOR
ORV
FILTER
DRIER
RUPTURE DISC
WA TER COOLED
CONDENSER
OIL RETURN
SERVICE VALVE
ORV
DPT
CPDS
DISCHARGE
SERVICE
CONNECTION
HPS
ECONOMIZER
SERVICE
CONNECTION
SPT
SUCTION SERVICE
CONNECTION
QUENCH
TXV
BULB
CPSS
STANDARD OPERATION WITH RECEIVER
STANDARD OPERATION WITH WATER COOLED CONDENSER
STS
DPT
CPDS
RECEIVER
FUSIBLE PLUG
SIGHT GLASS
MOISTURE INDICATOR
LIQUID LINE
SERVICE
CONNECTION
FILTER
DRIER
ECONOMIZER
TXV
ESV
ECONOMIZER
ECONOMIZER TXV BULB
HPS
OIL RETURN
SERVICE VALVE
DISCHARGE
SERVICE
CONNECTION
SPT
SUCTION SERVICE
CONNECTION
USV
LOW SIDE ACCESS VALVE
DISCHARGE LIQUID SUCTION
ESV
ECONOMIZER
TXV
LIQUID LINE
SERVICE
CONNECTION
SIGHTGLASS/
MOISTURE INDICATOR
ECONOMIZER
SERVICE
CONNECTION
ECONOMIZER
LIV
EVAPORATOR
CONDENSER
TXV
TXV BULB
SMV
ECONOMIZER TXV BULB
USV
LOW SIDE ACCESS VALVE
LIV
Figure 2-6 Refrigeration Circuit Schematic -- Standard Operation

Carrier Streamline Scroll 69NT20-531-300 Specifications

General

Brand	Carrier
Model	Streamline Scroll 69NT20-531-300
Category	Refrigerator
Language	English

Summary

Safety Summary

General Safety Notices

General safety notices supplementing specific warnings and cautions for operation and maintenance.

Operating Precautions

Precautions for safe operation of the unit, including safety glasses and working in pairs.

Maintenance Precautions

Precautions for maintenance, emphasizing power disconnection and securing the unit.

Specific Warning and Caution Statements

Listing of specific warnings and cautions applicable to the refrigeration unit.

2.2 Refrigeration System Data

2.3 Electrical Data

2.4 Safety and Protective Devices

SECTION 3 MICROPROCESSOR

3.3.5 Compressor High Temperature, Low Pressure Protection

Controller monitoring of compressor temperatures and pressures for protection.

3.4 Controller Alarms

Information on controller alarms, their generation, and display.

3.5 Unit Pre-Trip Diagnostics

Details the independent controller function for automatic or manual pre-trip testing.

3.6 DataCORDER

Overview of the DataCORDER software for temperature recording and parameter logging.

SECTION 4 OPERATION

4.1 Inspection (Before Starting)

Pre-operation inspection checklist for the refrigeration unit and container.

4.5 Starting and Stopping Instructions

Instructions for safely starting and stopping the unit.

4.6 Start-Up Inspection

Steps for performing a start-up inspection of the unit.

4.7 Pre-Trip Diagnosis

Details automatic testing of unit components using internal measurements.

SECTION 5 TROUBLESHOOTING

5.1 Unit Will Not Start or Starts Then Stops

Troubleshooting for units that fail to start or stop intermittently.

5.2 Unit Operates Long or Continuously in Cooling

Troubleshooting for units that run continuously during cooling operation.

5.3 Unit Runs But Has Insufficient Cooling

Troubleshooting for units that run but do not provide adequate cooling.

5.4 Unit Will Not Heat or Has Insufficient Heating

Troubleshooting for units that fail to heat or provide insufficient heating.

5.5 Unit Will Not Terminate Heating

Troubleshooting for units that fail to stop heating operation.

5.6 Unit Will Not Defrost Properly

Troubleshooting for units that do not initiate or complete defrost cycles.

5.7 Abnormal Pressures (Cooling)

Troubleshooting for abnormal high or low pressures during cooling.

5.8 Abnormal Noise or Vibrations

Troubleshooting for abnormal noise or vibrations from the compressor or fans.

5.9 Controller Malfunction

Troubleshooting for controller issues, including loss of control or wiring faults.

5.10 No Evaporator Air Flow or Restricted Air Flow

Troubleshooting for lack of or restricted airflow from the evaporator.

5.11 Thermostatic Expansion Valve Malfunction

Troubleshooting for issues related to the thermostatic expansion valve.

5.12 Autotransformer Malfunction

Troubleshooting for autotransformer issues, such as unit not starting.

5.13 Water-Cooled Condenser or Water Pressure Switch

Troubleshooting for water-cooled condenser and water pressure switch faults.

5.14 Compressor Operating in Reverse

Troubleshooting for compressor operating in reverse, warning about internal damage.

5.15 Abnormal Temperatures

Troubleshooting for abnormal discharge or suction temperatures.

5.16 Abnormal Currents

Troubleshooting for abnormal current readings from the unit.

SECTION 6 SERVICE

6.2 Service Valves

Description of service valves, their function, and operation.

6.3 Manifold Gauge Set

Use of manifold gauge set for system pressure, charging, and evacuation.

6.4 Pumping the Unit Down

Procedure for pumping down the unit to service specific components.

6.5 Refrigerant Leak Checking

Recommended procedures for finding refrigerant leaks in the system.

6.6 Evacuation and Dehydration

Procedures for evacuating and dehydrating the refrigeration system.

6.7 Refrigerant Charge

Procedures for checking and adding refrigerant charge to the system.

6.8 Compressor - Model RSH105

Information and procedures related to the RSH105 compressor.

6.8.1 Removal and Replacement of Compressor

Step-by-step instructions for removing and replacing the compressor.

6.9 Compressor Oil Level

Procedures for checking and adding compressor oil.

6.10 High Pressure Switch

Procedures for replacing and checking the high pressure switch.

6.10.1 Replacing High Pressure Switch

Step-by-step instructions for replacing the high pressure switch.

6.10.2 Checking High Pressure Switch

Procedure for testing the high pressure switch functionality.

6.11 Condenser Coil

Instructions for cleaning and replacing the condenser coil.

6.12 Condenser Fan and Motor Assembly

Procedures for servicing the condenser fan and motor assembly.

6.13 Filter-Drier

Information on checking and replacing the filter-drier.

6.14 Expansion Valves

Description and procedures for servicing evaporator and economizer expansion valves.

6.14.1 Checking Superheat

Procedure for checking superheat for the evaporator expansion valve.

6.14.2 Valve Replacement

Instructions for removing and installing expansion valves.

6.15 Evaporator Coil and Heater Assembly

6.15.1 Evaporator Coil Replacement

6.15.2 Evaporator Heater Replacement

6.16 Economizer, Unloader, Liquid Injection and Oil Return Solenoid Valve

6.17 Evaporator Fan and Motor Assembly

6.17.1 Replacing The Evaporator Fan Assembly

6.18 Evaporator Fan Motor Capacitors

6.19 Valve Override Controls

6.20 Suction Modulation Valve

6.20.1 Precheck Procedure

6.20.2 Checking The Stepper Valve

6.21 Controller and Expansion Module

6.21.2 Controller Trouble-Shooting

6.21.3 Controller Programming Procedure

6.21.4 Removing and Installing a Module

6.22 Temperature Sensor Service

6.22.2 Sensor Replacement

6.24 Composite Control Box Repairs

6.25 Communications Interface Module Installation

SECTION 7 ELECTRICAL WIRING SCHEMATIC