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Carrier 23XL User Manual

Carrier 23XL
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103
LEGEND
*Field supplied terminal strip must be located in the control center.
Fig. 52 — Typical COMM1 CCN Communication Wiring for Multiple Chillers
Factory Wiring
Field Wiring
Component Terminal
Control Panel Terminal

Table of Contents

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Carrier 23XL Specifications

General IconGeneral
BrandCarrier
Model23XL
CategoryChiller
LanguageEnglish

Summary

SAFETY CONSIDERATIONS

INTRODUCTION

ABBREVIATIONS AND EXPLANATIONS

23XL CHILLER FAMILIARIZATION

Chiller Identification Nameplate

Identifies the chiller model, serial number, and key specifications.

System Components

Lists and briefly describes the main components of the chiller system.

SERIAL NUMBER BREAKDOWN

Explains the breakdown and meaning of the chiller's serial number.

Power Up the Controls and Check the Oil Heater

Software Configuration

Setting up the chiller's software and parameters for operation.

Input the Design Set Points

Configuring operational set points for the chiller's performance.

Input the Local Occupied Schedule (OCCPC01S)

Setting the time schedule for local chiller operation.

Input Service Configurations

Entering service-related parameters and settings for the chiller.

Perform A Control Test

COOLER AND CONDENSER PRESSURE TRANSDUCER AND WATERSIDE FLOW DEVICE CALIBRATION

Calibrating pressure transducers and waterside flow devices for accurate readings.

Charge Refrigerant Into Chiller

TRIMMING REFRIGERANT CHARGE

Adjusting the refrigerant charge for optimal chiller performance.

INITIAL START-UP

Preparation

Pre-start checks and verifications before initial chiller operation.

Dry Run to Test Start-Up Sequence

Performing a dry run to verify the start-up sequence.

To Prevent Accidental Start-Up

Methods to prevent unintended chiller starts during service.

REFRIGERATION CYCLE

MOTOR COOLING CYCLE

LUBRICATION CYCLE

Summary

Provides a brief overview of the lubrication system.

Details

Explains the specific components and functions of the oil system.

Oil Reclaim System

Oil Loss Prevention

Slide Valve Principle

Explains how the slide valve controls capacity using oil pressure.

STARTING EQUIPMENT

Unit Mounted Solid-State Starter (Optional)

Describes the optional solid-state starter for reduced voltage starting.

Unit Mounted Wye-Delta Starter (Optional)

Describes the optional wye-delta starter for reduced voltage starting.

CONTROLS

Definitions

Defines key terms like Analog Signal and Discrete Signal.

General Controls Overview

Overview of the microprocessor-based control system.

PIC II System Components

Details the components of the PIC II control system.

CVC Operation and Menus (Fig. 17-23)

Explains how to operate the Chiller Visual Controller and navigate its menus.

OVERRIDE OPERATIONS

To Override a Value or Status

Step-by-step guide to overriding values or statuses on the CVC.

TIME SCHEDULE OPERATION (Fig. 22)

To Remove an Override

Steps to remove an override and return to automatic control.

TO VIEW AND CHANGE SET POINTS (Fig. 23)

SERVICE OPERATION

Accessing and using the service operation programs.

PIC II System Functions

CAPACITY CONTROL

PIC II controls chiller capacity via slide valve based on water temperature.

ECW CONTROL OPTION

Option to use entering chilled water temp for slide valve modulation.

CONTROL POINT DEADBAND

Tolerance range for chiller control point to maintain temperature.

PROPORTIONAL BANDS AND GAIN

Adjusting slide valve response to temperature changes.

DEMAND LIMITING

PIC II limits slide valve opening based on active demand limit set point.

OCCUPANCY SCHEDULE

How schedules determine chiller operation times.

Safety Controls

Shunt Trip (Option)

Function of the shunt trip option as a safety trip mechanism.

Default Screen Freeze

Ramp Loading

Capacity Override (Table 5)

Low Discharge Temperature Control

Oil Sump Temperature Control TC (Frame 1 and 2) Chillers Only

Water Treatment

Remote Start/Stop Controls

Refrigerant Leak Detector

Condenser Pump Control

Condenser Freeze Prevention

Auto. Restart After Power Failure

Water/Brine Reset

RESET TYPE 1

Automatic chilled water temp reset based on remote sensor input.

RESET TYPE 2

Automatic chilled water temp reset based on remote sensor input.

RESET TYPE 3

Automatic reset based on cooler temperature difference.

Demand Limit Control Option

Hot Gas Bypass (Optional) Algorithm (See Fig. 24 and 25)

Lead/Lag Control

Lead/Lag System Requirements

Lists requirements for implementing lead/lag control.

COMMON POINT SENSOR INSTALLATION

Information on installing common point sensors for lead/lag.

LEAD/LAG OPERATION

Lead/Lag Chiller Configuration and Operation

How to configure and operate lead/lag chillers.

Standby Chiller Configuration and Operation

Lag Chiller Shutdown Requirements

Ice Build Control

ICE BUILD INITIATION

How the ice build time schedule activates the ice build option.

START-UP/RECYCLE OPERATION

Procedures for starting up or recycling during ice build.

TEMPERATURE CONTROL DURING ICE BUILD

How temperature is controlled during ice build.

TERMINATION OF ICE BUILD

RETURN TO NON-ICE BUILD OPERATIONS

Attach to Network Device Control

ATTACHING TO OTHER CCN MODULES

Connecting and viewing other CCN modules.

Service Operation

TO ACCESS THE SERVICE SCREENS

Steps to access service screens, including password entry.

TO LOG OUT OF NETWORK DEVICE

HOLIDAY SCHEDULING (Fig. 28)

START-UP/SHUTDOWN/ RECYCLE SEQUENCE (Fig. 29)

Local Start-Up

Initiating a local start-up sequence for the chiller.

Shutdown Sequence

Automatic Soft Stop Amps Threshold

Chilled Water Recycle Mode

BEFORE INITIAL START-UP

Job Data Required

List of essential job data needed before initial start-up.

Equipment Required

List of tools and equipment needed for start-up.

Check Chiller Tightness

Procedures for checking the chiller for leaks.

TO PRESSURIZE WITH DRY NITROGEN

Method for pressurizing with dry nitrogen for leak testing.

Leak Test Chiller

If the pressure readings are normal for chiller condition

Steps for leak testing when pressure is normal.

If the pressure readings are abnormal for chiller condition

Steps for leak testing when pressure is abnormal.

Chiller Dehydration

Perform dehydration as follows:

Step-by-step guide for performing chiller dehydration.

Inspect Wiring

Check Starter

MECHANICAL STARTER

Checks for mechanical starters, including wiring and connections.

Carrier Comfort Network Interface

Software Configuration

Input the Design Set Points

Configuring operational set points for the chiller's performance.

Input the Local Occupied Schedule (OCCPC01S)

Setting the time schedule for local chiller operation.

Input Service Configurations

Entering service-related parameters and settings for the chiller.

Perform a Control Test

CCM Pressure Thermistors

Checking all thermistor temperature sensors.

CCM Pressure Transducers

Checking all pressure transducers.

Pumps

Checking pump outputs and associated inputs.

Slide Valve

Checking the slide valve operation.

Pumpdown/Lockout

Procedures for pumpdown and lockout.

Terminate Lockout

Procedures to terminate pumpdown lockout.

COOLER CONDENSER PRESSURE TRANSDUCER AND WATERSIDE FLOW DEVICE CALIBRATION

To calibrate these transducers:

Steps for calibrating cooler and condenser transducers.

CHILLER EQUALIZATION WITHOUT A PUMPOUT UNIT

CHILLER EQUALIZATION WITH PUMPOUT UNIT

OPERATING INSTRUCTIONS

Operator Duties

Responsibilities of the chiller operator.

Prepare the Chiller for Start-Up

Steps to prepare the chiller before starting.

To Start the Chiller

Procedure for starting the chiller.

Check the Running System

Monitoring the chiller's operation after start-up.

To Stop the Chiller

Preparation for Extended Shutdown

Cold Weather Operation

Slide Valve Operation

Refrigeration Log

PUMPOUT AND REFRIGERANT TRANSFER PROCEDURES

Preparation

Preparing for refrigerant transfer using pumpout systems.

Operating the Optional Pumpout Unit

TO READ REFRIGERANT PRESSURES during pumpout or leak testing:

Methods for reading refrigerant pressures during pumpout.

Chillers with Isolation Valves

TRANSFER ALL REFRIGERANT TO CHILLER CONDENSER VESSEL

Transferring refrigerant to the condenser vessel.

TRANSFER ALL REFRIGERANT TO CHILLER COOLER VESSEL

Transferring refrigerant to the cooler vessel.

RETURN CHILLER TO NORMAL OPERATING CONDITIONS

Chillers with Storage Tanks

TRANSFER REFRIGERANT FROM PUMPOUT STORAGE TANK TO CHILLER

Transferring refrigerant from the pumpout tank to the chiller.

TRANSFER REFRIGERANT FROM CHILLER TO PUMPOUT STORAGE TANK

Transferring refrigerant from the chiller to the pumpout tank.

Establish a vacuum for service

GENERAL MAINTENANCE

Refrigerant Leak Testing

Methods for testing refrigerant leaks.

Test After Service, Repair, or Major Leak

Leak testing after service or repairs.

TO PRESSURIZE WITH DRY NITROGEN

Method for pressurizing with dry nitrogen for leak testing.

WEEKLY MAINTENANCE

Check the Lubrication System

Observing oil levels in sight glasses weekly.

SCHEDULED MAINTENANCE

Service Ontime

Resetting the service timer for tracking maintenance intervals.

Inspect the Control Panel

General cleaning and tightening of connections for the control panel.

Changing Oil and Oil Filter

Procedures for changing the oil and oil filter.

Changing Oil Filter

Changing Oil

Oil Separator Coalescer

Refrigerant Filter/Drier

Inspect Refrigerant Float System

Inspect Relief Valves and Piping

Inspect the Heat Exchanger Tubes

COOLER

Inspecting and cleaning cooler tubes.

CONDENSER

Inspecting and cleaning condenser tubes.

Water Treatment

Inspect the Starting Equipment

Check Pressure Transducers

TROUBLESHOOTING GUIDE

Overview

Introduction to the PIC II features for troubleshooting.

Checking Display Messages

Checking Temperature Sensors

RESISTANCE CHECK

Procedure to check sensor resistance.

CHECK SENSOR ACCURACY

Verifying sensor accuracy against a known temperature.

COOLER CONDENSER PRESSURE TRANSDUCER AND WATERSIDE FLOW DEVICE CALIBRATION

To calibrate these transducers:

Steps for calibrating cooler and condenser transducers.

Control Algorithms Checkout Procedure

CONTROL ALGORITHM STATUS

Viewing maintenance screens for control algorithms.

Control Test

Testing various chiller outputs and controls.

TRANSDUCER REPLACEMENT

Table 9 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides

A. MANUAL STOP

Primary and secondary messages for manual stops.

B. READY TO START

Primary and secondary messages related to readiness for start-up.

C. IN RECYCLE SHUTDOWN

Primary and secondary messages for recycle shutdowns.

Table 9 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont)

D. PRE-START ALERTS

Alerts that delay start-up, requiring correction.

E. START-UP IN PROGRESS

Messages indicating the chiller is in the process of starting.

Table 9 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont)

F. NORMAL RUN

Messages indicating normal chiller operation.

G. NORMAL RUN WITH OVERRIDES

Messages indicating normal operation with overrides active.

H. OUT-OF-RANGE SENSOR ALARMS

Alarms triggered by sensors outside their normal range.

Table 9 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont)

I. CHILLER PROTECT LIMIT FAULTS

Faults related to chiller protective limits.

Table 9 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont)

I. CHILLER PROTECT LIMIT FAULTS (cont)

Continues listing faults related to chiller protective limits.

Table 9 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont)

J. CHILLER ALERTS

Alerts related to chiller operations.

Table 9 — CVC Primary and Secondary Messages and Custom Alarm/Alert Messages with Troubleshooting Guides (cont)

J. CHILLER ALERTS (cont)

Continues listing alerts related to chiller operations.

Control Modules

RED LED (Labeled as STAT)

Status indication of the STAT LED on modules.

GREEN LED (Labeled as COM)

Status indication of the COM LED on modules.

Notes on Module Operation

Chiller Control Module (CCM) (Fig. 43)

INPUTS

Describes the inputs for the Chiller Control Module.

OUTPUTS

Describes the outputs for the Chiller Control Module.

Integrated Starter Module (ISM) (Fig. 44)

INPUTS

Describes the inputs for the Integrated Starter Module.

OUTPUTS

Describes the outputs for the Integrated Starter Module.

Replacing Defective Processor Modules

INSTALLATION

Steps for installing a replacement processor module.

Solid-State Starters

SCR REMOVAL/INSTALLATION

Physical Data

Table 11 — 23XL Heat Exchanger Weights

Weights of heat exchanger components.

Table 12 — 23XL Compressor Weights

Weights of the 23XL compressor assemblies.

Table 13 — 23XL Component Weights

Weights of various chiller components.

Table 14A — 23XL Waterbox Cover Weights (Frame 1 and 2 Machines)*

Table 14B — 23XL Waterbox Cover Weight (Frame 4 Machines)*

Table 15 — Optional Storage Tank and/or Pumpout System Physical Data

Table 16 — Optional Storage Tank and/or Pumpout System Electrical Data

Table 17A — 23XL Waterbox Cover Weights (TC Frame 1 and 2 Chillers)*

Table 17B — 23XL Waterbox Cover Weight (TD Frame 4 Chillers)*

Table 18 — 23XL Compressor Torque Specification Chart for Metric amd American Fasteners

INITIAL START-UP CHECKLIST FOR 23XL HERMETIC SCREW LIQUID CHILLER

23XL PIC II SETPOINT TABLE CONFIGURATION SHEET

23XL PIC II TIME SCHEDULE CONFIGURATION SHEET OCCPC01S

ICE BUILD 23XL PIC II TIME SCHEDULE CONFIGURATION SHEET OCCPC02S

23XL PIC II TIME SCHEDULE CONFIGURATION SHEET OCCPC03S

23XL PIC II ISM_CONF TABLE CONFIGURATION SHEET

23XL PIC II OPTIONS TABLE CONFIGURATION SHEET

23XL PIC II SETUP1 TABLE CONFIGURATION SHEET

23XL PIC II SETUP2 TABLE CONFIGURATION SHEET

23XL PIC II LEADLAG TABLE CONFIGURATION SHEET

23XL PIC II RAMP_DEM TABLE CONFIGURATION SHEET

23XL PIC II TEMP_CTL TABLE CONFIGURATION SHEET

23XL BROADCAST (BRODEF) CONFIGURATION SHEET

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