Table of Contents
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Original
Instruction
&
Maintenance
Manual
HITACHI AIR
CONDITIONER
OUTDOOR UNIT
Models:
Outdoor Units：
RAS-070HNBRMQ2
RAS-080HNBRMQ2
RAS-090HNBRMQ2
RAS-100HNBRMQ2
RAS-110HNBRMQ2
RAS-120HNBRMQ2
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
USING THIS HEAT-PUMP
AIR CONDITIONER.
KEEP THIS MANUAL FOR
FUTURE REFERENCE.
P02005Q
Original Instructions
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Table of Contents
Related Manuals for Hitachi RAS-080HNBRMQ2
Summarization of Contents
SAFETY SUMMARY
Signal Word Definitions
Defines DANGER, WARNING, CAUTION, NOTICE, and NOTE for hazard communication.
Handling Hazardous Situations
Outlines critical DANGER and WARNING statements for safe operation and installation.
Operational and Installation Precautions
Details CAUTIONary advice and NOTICE for proper use and installation.
Before Installation
Necessary Tools and Instruments
Lists essential tools and instruments required for installation.
Unit Structure and Components
Provides an overview of the outdoor unit's main parts and their functions.
Refrigerant Cycle and Unit Combinations
Illustrates the refrigerant flow and details compatible indoor/outdoor unit capacities.
Transportation and Included Accessories
Covers safe handling during transport and lists factory-supplied accessories.
Outdoor Unit Installation
Site Selection and Installation Precautions
Guides on choosing the optimal installation location and necessary precautions.
Service Space Requirements
Specifies required clearances around the unit for maintenance and airflow.
Securing the Outdoor Unit
Details on anchoring the unit securely to the foundation using anchor bolts.
Refrigerant Piping
Refrigerant Piping Best Practices
General guidelines for using copper pipes, keeping them clean, and avoiding rain.
Pipe Connection Techniques
Covers essential techniques for brazing and flaring refrigerant pipes.
Pipe Sizing and Branching
Details on selecting correct pipe sizes and connecting multiple indoor units.
Leak Testing and Vacuuming
Procedures for performing air-tightness tests and vacuuming the system.
Refrigerant Charging Procedures
Instructions for calculating and adding refrigerant to the system.
Pressure Measurement Points
Identifies specific ports for checking system pressures during operation.
Electrical Wiring and Connections
Pre-Wiring Electrical Checks
Essential checks of power supply, wiring, and grounding before electrical work.
Outdoor Unit Wiring Installation
Specific instructions for connecting power supply and communication cables to the outdoor unit.
System Configuration
DIP Switch Settings for Operation
Explains the functions of various DIP switches for test and diagnostic purposes.
Setting Refrigerant Cycle Number
Details how to set the refrigerant cycle number for system communication.
Test Run Procedures
Pre-Test Run Preparations
Steps to ensure the system is ready before initiating a test run.
Performing Test Runs
Instructions for conducting test runs using DIP switches or a wired controller.
Alarm Codes and Troubleshooting
Understanding Alarm Codes
Lists common alarm codes, their malfunctions, and reasons.
Safety and Control Devices
Compressor Protection Mechanisms
Details the high pressure switch and crankcase heater for compressor safety.
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