Hitachi RCI User Manual

4.1 Unit electrical wiring and connection
4.1.1 Wiring and main switch selection
Minimum size of the power supply cable wires
N O T E
• Follow local code and regulations to select the installation cables.
• The maximum current value is used to calculate the size of the cables in line with European Standard EN60
335-1. Use normal, flexible coated neoprene (polychloroprene) cables (code H05RN-F) with a diameter no less
than that indicated in the table.
• The size of the earth wire must be in line with local code IEC 245, no. 571.
• Use a shielded twisted pair cable or shielded pair cable with a diameter of over 0.75 mm
2
(equivalent to KPEV-
S) for the operation wiring between the outdoor and the indoor unit and for operation wiring between the indoor
units.
• Use a shielded twisted pair cable or shielded pair cable for communications between the indoor and outdoor
units. Connect the shielding to the earthing screw in the indoor unit electrical box.
If the power cables are connected in series, use the maximum current value and select the cables according to the following
tables.
• For indoor units:
Model Power supply
Max. current
(A)
Power supply cable size Transmission cable size
EN60 335-1 EN60 335-1
All indoor units
(*)
1 phase, 230 V, 50 Hz 5 0.75 mm
2
0.75 mm
2
(*)
Except RPI-(8.0/10.0)FSN2E
• For KPI units:
Model
Power supply Maximum current, (A)
Power supply cable size
(mm
2
)
Current I (A) Cable size (mm
2
) Current I (A) Cable size (mm
2
)
KPI-(252-802)E2E 1 phase, 230 V, 50 Hz 4 0.75
KPI-(1002-2002)E2E 1 phase, 230 V, 50 Hz 8 1
KPI-(3002)H2E 1 phase, 230 V, 50 Hz 12 1.5
Cable size in relation to current
N O T E
• Use shielded transmission cables between indoor and outdoor units.
• Use normal, flexible coated neoprene (polychloroprene) cables (code H05RN-F) with a diameter no less than
that indicated in the table.
• If the current exceeds 63 A, do not connect the cables in series.
4 Electrical wiring
112
SMGB0063 rev. 1 - 10/2010

Hitachi RCI Specifications

General

Brand	Hitachi
Model	RCI
Category	Air Conditioner
Language	English

Summary

General Information and Safety

Safety Symbols and Precautions

Explains safety symbols (Danger, Caution, Note) and general safety guidelines for unit installation and operation.

Unit Installation

RCI 4-way Cassette Unit Installation

RPI/RPIM Ducted Unit Installation

RPK Wall Mounted Unit Installation

RPF/RPFI Floor Unit Installation

Piping Work and Refrigerant Charge

Gas Refrigerant Pipe Selection

Guidelines for selecting correct gas refrigerant pipe sizes based on outdoor unit power.

Copper Pipe Specifications and Connections

Refrigerant and Drain Hose Installation

Specific instructions for installing refrigerant pipes and drain hoses for various indoor unit types.

Electrical Wiring

Unit Electrical Wiring and Connection

General guidelines for wiring, main switch selection, and power cable sizing.

Setting of DIP switches and RSW switches

Control System

Device Control System Overview

Explains the purpose of control for compressor, expansion valves, fans, and solenoid valves.

Test Run

Pre-Test Run Checks and Procedures

Essential checks and procedures before performing the system test run.

Test Procedure with Remote Control

Step-by-step guide for conducting the test run using a wired remote control.

Test Run Checklist

Troubleshooting

RPK Unit PCB Self-Check

Procedure for self-checking the indoor unit PCB using relays and DIP switches.

Electronic Expansion Valve Check Procedure

Servicing Procedures

RCI 4-way Cassette Servicing

Step-by-step guide for removing components of RCI 4-way cassette units.

RCIM Compact Cassette Servicing

Step-by-step guide for removing components of RCIM compact cassette units.

RCD 2-way Cassette Servicing

RPK Wall Mounted Unit Servicing

RPF(I) Floor Unit Servicing

Electrical Checks of Main Parts

Thermistor Electrical Checks

Electronic Expansion Valve Checks

Maintenance Notes

Regular Equipment Maintenance Procedures

Indoor Heat Exchanger Cleaning Guide

Refrigerant Collection for Replacement

Procedure for safely collecting refrigerant when replacing an indoor unit.