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Hitachi RCUE40AG2 User Manual

Hitachi RCUE40AG2
182 pages
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RCUE40AG2-400AG2
RHUE40AG2-240AG2
Cooling capacity 112 kW - 1030 kW
Cooling capacity 106 kW - 585 kW
Heating capacity 110 kW - 556 kW
Service Manual
AIR COOLED WATER CHILLERS
(COOLING ONLY AND HEAT PUMP)

Table of Contents

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Hitachi RCUE40AG2 Specifications

General IconGeneral
BrandHitachi
ModelRCUE40AG2
CategoryChiller
LanguageEnglish

Summary

Product Range and Specifications

General Data for RCUE40-400AG2

Detailed specifications for RCUE40-400AG2 air-cooled water chillers, covering capacity, dimensions, and electrical data.

General Data for RHUE40-240AG2

Detailed specifications for RHUE40-240AG2 air-to-water heat pump chillers, including capacity and dimensions.

General Data for RHUE80-240AG2

Detailed specifications for RHUE80-240AG2 air-to-water heat pump chillers, covering capacity and dimensions.

General Data for RCUE160-400AG2

Detailed specifications for RCUE160-400AG2 air-cooled water chillers, including capacity, dimensions, and electrical data.

Test Run Procedures

Pre-Test Run Checks

Essential checks of the unit's cabinet, refrigerant, electrical, and water systems before initiating a test run.

Test Run Methods and Checks

Procedures for conducting cooling and heating test runs, including pressure checks and electrical consumption verification.

Restarting After Test Run

Steps for safely restarting the unit after a test run, covering checks on various systems and components.

Delivery Instructions and Cautions

Guidelines for instructing customers on unit operation, maintenance, and important safety precautions during delivery.

Electrical Wiring Diagrams

Power Wiring Diagrams

Detailed power wiring diagrams for various chiller models, illustrating electrical connections for main components.

Power Wiring Diagrams (FAN)

Specific power wiring diagrams focusing on the fan system for all chiller models, detailing fan motor connections.

Control PCB (PCBc) Diagrams

Wiring diagrams for the control PCB (PCBc), including primary and secondary boards for different model ranges.

Input/Output PCB (PCBd) Diagrams

Wiring diagrams for the input/output PCB (PCBd), covering various RCUE and RHUE model series.

Power Wiring Diagrams (MCB Option)

Power wiring diagrams illustrating the MCB option for different chiller model series, detailing circuit breaker connections.

Diagram Abbreviations and Symbols

A comprehensive list of abbreviations, marks, symbols, and model codes used in the electrical diagrams for reference.

Control System Functionality

Water Temperature Control Logic

Explanation of the automatic temperature adjustment system, including thermistor detection and capacity control logic.

Compressor Control Mechanisms

Details on compressor starting, time guard, sequential starting, and rotation control for optimal operation and lifespan.

Current Limit Control Function

Description of the automatic forced unload function to manage power consumption exceeding set points.

Restart Controls After Power Failure

Procedures for unit restart after momentary or extended power failures, including optional settings.

Second Water Temperature Setting Modes

How to configure and use secondary temperature settings for different operating modes like air-conditioning and heat storage.

Defrost Operation for Heat Pumps

Detailed explanation of the reverse-cycle defrosting process for air-cooled heat pump types, including start conditions.

Thermo Off Selection Function

Functionality to prevent unexpected Thermo OFF states due to temperature changes or flow volume variations.

Troubleshooting and Diagnostics

Initial Checks and Basic Troubleshooting

Initial checks for power supply, connections, and basic troubleshooting procedures for unit abnormalities.

PCB Checks and Configurations

Guidance on checking PCB configurations and settings for various models to resolve operational issues.

Protection Device Activation Values

Table detailing the activation values for various protection devices and automatic operation parameters.

Abnormal Running Analysis and Countermeasures

Comprehensive analysis of abnormal running phenomena, identifying causes, check points, and countermeasures.

Thermistor Temperature Characteristics

Graphs showing the temperature-resistance characteristics of thermistors used for monitoring various system temperatures.

Maintenance and Servicing

General Maintenance Criteria and Schedule

Guidelines for routine maintenance checks and criteria for general components, cabinet, and refrigerant circuits.

Screw Compressor Maintenance Criteria

Specific maintenance criteria for screw compressors, including daily and periodic checks and overhaul procedures.

Water Quality Maintenance Guidelines

Criteria and methods for maintaining water quality in the circulation system to prevent corrosion and ensure performance.

Water Side Heat Exchanger Cleaning

Procedures and cautions for cleaning the water side heat exchanger, including the use of cleaning agents and wastewater treatment.

Daily Operation Check Items

A checklist of daily operational items to be checked for proper functioning of the chiller unit.

Handling Refrigerant R407C Precautions

Important precautions and considerations for handling refrigerant R407C, including its properties and compatible parts.

Compressor Overhaul and Parts Check Manual

Guidance on performing overall checks and parts replacement for the compressor, including refrigerant collection.

Refrigerant Cycle Diagrams

Refrigerant cycle diagrams for various air-cooled water chiller and air-to-water heat pump models.

Vacuuming Procedures for Refrigerant Cycle

Step-by-step instructions for vacuuming the refrigerant cycle after service or repair to ensure proper system integrity.

Additional Refrigerant Insertion Guidelines

Procedures and cautions for adding refrigerant, including tank confirmation, measurement devices, and insertion techniques.

Expansion Valve Replacement Cautions

Important precautions to be taken when replacing the expansion valve, especially concerning refrigerant handling and zero point adjustment.

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