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Hitachi RAS-2WHVRP User Manual

Hitachi RAS-2WHVRP
168 pages
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YUTAKI SERIES
AND YUTAKI CASCADE CONTROLLER
R410A series
R32 series

Table of Contents

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Hitachi RAS-2WHVRP Specifications

General IconGeneral
TypeHeat Pump
Cooling Capacity2.5 kW
Power Supply220-240V, 50Hz
RefrigerantR410A
Indoor Unit Weight9 kg

Summary

1 GENERAL INFORMATION

1.1 General information

Provides general overview and notes about the YUTAKI system and documentation.

1.2 Applied symbols

Explains the meaning of symbols used in the manual for safety and information.

1.3 Product guide

Details the classification and listing of different YUTAKI units, including split and monobloc systems.

2 GENERAL SAFETY NOTES

2.1 Additional information about safety

Provides crucial safety precautions and warnings for installation and operation of the heat pump.

2.2 Important notice

Highlights critical instructions for manual adherence to ensure proper system function and prevent faults.

3 ELECTRICAL DATA

3.2.1 Considerations

Outlines key considerations and terminology for understanding electrical specifications of the units.

3.2.2 Split system - R410A Outdoor unit

Provides electrical specifications for R410A outdoor units used with YUTAKI S and S COMBI.

3.2.5 Monobloc system

Presents electrical specifications for YUTAKI M (R32) and YUTAKI M (R410A) monobloc systems.

3.3 Water piping

Details guidelines for water circuit design, including piping lengths and sizes for various YUTAKI models.

4 WORKING RANGE

4.1 Power supply working range

Defines the acceptable nominal, operating, and starting voltage ranges for power supply.

4.2 R410A Temperature working range

Illustrates the operational temperature ranges for R410A units in space heating mode.

4.3 R32 Temperature working range

Presents temperature working ranges for R32 units in space heating configurations.

4.5.2 Pump performance curves

Illustrates pump performance curves for YUTAKI S and S COMBI units.

5 REFRIGERANT AND WATER PIPING

5.1.2 Refrigerant piping

Details refrigerant piping length requirements and minimum area considerations for YUTAKI S/S COMBI.

5.2.2 Precautions in the event of gas refrigerant leaks

Outlines essential precautions and countermeasures for handling gas refrigerant leaks.

5.3.2 Water piping size

Details the required water piping connection sizes (inches) for different YUTAKI models and functions.

6 ELECTRICAL AND CONTROL SETTINGS

6.1 General check

Ensures power supply installation conditions are met, including capacity, voltage, and impedance.

6.2.2 Minimum requirements of the protection devices

Outlines mandatory protection devices like Earth Leakage Breakers (ELB) and circuit breakers (CB).

6.3 Terminal board connections

Illustrates main power supply and communication wiring connections to terminal boards.

Input terminals (Default input functions)

Describes connections for PC-ARFH1E, 4-20mA, Earth, and DHWT Thermistor.

7 UNIT CONTROLLER

7.1 Definition of the Switches

Identifies and explains the function of each button on the PC-ARFH1E unit controller.

7.6 Controller Configuration

Guides through controller configuration steps, including language, date, time, and assistant setup.

7.8.2 System configuration

Guides through configuring all system settings, including general options, timers, and water settings.

7.8.2.5 Domestic Hot Water (DHW) configuration

Explains configuration for DHW settings, including control modes, temperatures, and anti-legionella functions.

7.8.3 Commissioning

Provides steps for commissioning the system, including air purging, unit testing, and screed drying.

8 YUTAKI CASCADE CONTROLLER

8.1 Definition of the Switches

Identifies and explains the function of each button on the YUTAKI CASCADE CONTROLLER.

8.4 Cascade controller configuration

Guides through cascade controller configuration, including language, date/time, and assistant setup.

8.6.2 System configuration

Guides through configuring system settings, including general options, timers, and cascade configuration.

8.6.2.4 Domestic Hot Water (DHW) configuration

Explains DHW settings, including control modes, temperatures, anti-legionella, and space priority.

9 TROUBLESHOOTING

Alarms for Indoor units

Lists and explains alarms for indoor units, including their codes, details, and main factors.

Alarms for Outdoor units

Lists and explains alarms related to outdoor units, covering categories like Transmission and Power Supply.

10 MAINTENANCE

10.1 Maintenance work

Provides general procedures for inspection and maintenance of the unit, emphasizing safety precautions.

10.1.1 General maintenance procedure for the outdoor unit

Details routine maintenance checks for the outdoor unit's fan, heat exchanger, piping, cabinet, and electrical components.

10.1.2 General maintenance procedure for the indoor unit

Outlines periodic checks for the indoor unit's cabinet, water piping, flow, ground wire, and electrical equipment.

Draining

Provides step-by-step instructions for draining the YUTAKI S, S COMBI, S80, and M indoor units and DHW circuits.

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