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Hitachi RAS-7HVRNM2 User Manual

Hitachi RAS-7HVRNM2
58 pages
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TC-12001
2-73
OUTDOOR UNIT
Installation
&
Maintenance
Manual
INVERTER-DRIVEN
SPLIT SYSTEM
HEAT PUMP
AIR CONDITIONERS
- DC INVERTER UTOPIA -
Models:
Outdoor Units;
RAS-3HVRNM2
RAS-4HVRNM2
RAS-5HVRNM2
RAS-6HVRNM2
RAS-7HVRNM2
P5414950
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
USING THIS HEAT-PUMP
AIR CONDITIONERS.
KEEP THIS MANUAL FOR
FUTURE REFERENCE.
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Hitachi RAS-7HVRNM2 Specifications

General IconGeneral
CategoryAir Conditioner
TypeSplit System
Cooling Capacity2.0 kW
Heating Capacity2.5 kW
RefrigerantR32
Power Supply220-240V, 50Hz
Outdoor Unit Noise Level48 dB

Summary

1. Safety Summary

2. Structure

2.1 Name of Parts

Identifies and lists all parts of the outdoor unit with corresponding numbers and diagrams.

2.2 Necessary Tools and Instrument List for Installation

Provides a comprehensive list of tools and instruments required for proper installation.

3. Before Installation

3.1 Selection of Unit Model

Guides the process of selecting the appropriate outdoor and indoor unit models based on capacity.

3.2 Indoor Unit Selection for Multiple Connected Installation

Explains how to select indoor units for systems connected to a single outdoor unit.

3.3 Standard Combination of Outdoor Unit and Indoor Unit

Lists compatible combinations of specific outdoor and indoor unit models.

3.4 Enhanced Combination of Outdoor Unit and Indoor Unit

Details advanced rules for combining outdoor and indoor units beyond standard configurations.

4. Transportation and Handling

5. Outdoor Unit Installation

5.1 Factory-Supplied Accessories

Lists and describes the accessories included with the outdoor unit for installation.

5.2 Initial Check

Details essential checks to perform before installing the outdoor unit, covering location and conditions.

5.3 Service Space

Specifies the required clearances around the outdoor unit for operation and maintenance.

5.4 Installation Work

Explains the proper methods for securing the outdoor unit to its foundation using anchor bolts.

6. Refrigerant Piping Work

6.1 Piping Materials

Details the types of pipes and materials required for refrigerant lines and their preparation.

6.2 Flaring and Joint

Explains the correct procedure and specifications for flaring refrigerant pipes and making joints.

6.3 Pipe Selection

Guides the selection of appropriate pipe sizes based on unit capacity and piping length.

6.4 Piping Connection

Illustrates how to connect refrigerant pipes, including stop valve positions and directions.

6.5 Connecting Refrigerant Pipings

Details the process of connecting refrigerant pipes and tightening flare nuts to prevent leaks.

7. Electrical Wiring

7.1 General Check

Covers essential checks for electrical components, power supply, and grounding before wiring.

7.2 Wiring Connection

Shows how to connect power and control cables to the outdoor unit and between units.

Field Minimum Wire Sizes for Power Source

Specifies minimum wire sizes for power source connections based on European standards.

8. Setting of Dip Switch

Setting for Transmitting

Configuration of unit numbers and refrigerant cycle for communication systems.

Setting of Refrigerant Cycle No.

Assigns refrigerant cycle identification numbers for multiple unit systems.

Setting of End Terminal Resistance

Adjusts terminal resistance settings for H-LINK systems with multiple outdoor units.

< Setting of Multiple Indoor Units Simultaneous Operation >

Configures the dip switch for simultaneous operation of multiple indoor units.

Connection between Demand Response Enabling Device (DRED) and Outdoor Unit

Details the integration of the unit with Demand Response Enabling Devices (DRED).

9. Additional Refrigerant Charge

9.1 Air-Tight Test

Describes methods for performing leak tests on the refrigerant piping system.

9.2 Vacuum Pump and Refrigerant Charge

Details the process of evacuating the system and charging the correct amount of refrigerant.

9.3 Refrigerant Charging Quantity

Provides formulas and tables for calculating the required additional refrigerant quantity.

10. Test Run

10.1 Before Test Run

Lists crucial checks and preparations required before starting the unit's test run.

10.2 Test Run

Details the step-by-step process for conducting the operational test run and verifying system performance.

10.3 Optional Function Setting

Explains how to configure optional operating functions using the dip switch settings.

< External Input / Output Setting Method >

Describes the procedure for setting up external input and output signals for unit control.

11. Safety and Control Device Setting

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