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
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Summarization of Contents
Before Installation
Necessary Tools and Instrument List for Installation
Lists essential tools and instruments required for the installation process.
Structure
Details the internal components and layout of the outdoor unit with part names.
Refrigerant Cycle Diagram
Illustrates the refrigerant flow for cooling and heating operations.
Combination of Indoor Unit and Outdoor Unit
Provides guidelines on connecting indoor units to outdoor units based on capacity.
Transportation
Instructions on how to safely transport and handle the outdoor unit.
Factory supplied Accessories
Lists the accessories included with the outdoor unit package.
Outdoor Unit Installation
Installation Location and Precautions
Guidance on selecting appropriate locations and avoiding hazardous environments.
Service Space
Specifies the required clearance around the outdoor unit for maintenance and airflow.
Installation Work
Details the procedures for physically securing and installing the outdoor unit.
Refrigerant Piping Work
Precaution for Refrigerant Piping
Essential safety and handling precautions for refrigerant piping installation.
Model of Branch Pipe
Specifies the models and dimensions of branch pipes for connecting units.
Refrigerant Piping Size
Provides guidelines on selecting the correct pipe sizes for refrigerant lines.
Refrigerant Piping Work for Outdoor Unit
Explains how to route and connect refrigerant piping to the outdoor unit.
Air-Tightness Test
Describes the procedure for testing the piping system for leaks.
Vacuuming
Outlines the process for removing air and moisture from the refrigerant system.
Additional Refrigerant Charge Calculation
Details how to calculate the required amount of refrigerant for the system.
Additional Refrigerant Charge Work
Explains the steps for charging additional refrigerant into the system.
Pressure Measurement
Guides on measuring system pressures during operation and testing.
Electrical Wring
General Check
Covers pre-wiring checks of electrical components and supply.
Electrical Wiring Connection
Illustrates how to connect the power supply and communication wiring.
Electrical Wiring for Outdoor Unit
Specific instructions for wiring connections within the outdoor unit.
Test Run
Before Test Run
Pre-operational checks and safety considerations before starting the test run.
Test Run by DIP Switch of Outdoor Unit
Procedure for conducting a test run using the outdoor unit's DIP switches.
Test Run by Wired Controller
Method for performing a test run using the wired controller.
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