Hitachi FXG1 Series Technical Catalogue

Technical Catalog

SET-FREE

FSG(1)/FXG(1) SERIES

Technical Catalog - SET-FREE FSG/FXG

TCGB0023-rev.0-04/04

TCGB0023-rev.0-04/04 - Printed in Spain

Outdoor Units: 5 ~ 30 HP

Indoor Units Type:

• 4-Way Cassette

• 2-Way Cassette

• Wall

• Ceiling

• In-the-Ceiling

• Floor

• Floor Concealed

Specifications in this catalogue are subject to change without notice in order that

HITACHI may bring the latest innovations to their customers

Whilst every effort is made to ensure that all dimensions and specifications are correct,

any printers' errors not rectified are outside the control of HITACHI, who cannot be held

responsible for same

IMPORTANT NOTICE

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IMPORTANT NOTICE

n HITACHI pursues a policy of continuing improvement in

design and performance of products. The right is

therefore reserved to vary specifications without notice.

n HITACHI cannot anticipate every possible circumstance

that might involve a potential hazard.

n These heat pump air conditioners are designed for

standard air conditioning only. Do not use these heat

pump air conditioners for other purposes such as drying

clothes, refrigerating foods or for any other cooling or

heating process.

n No part of this catalog may be reproduced without written

permission.

n Signal words (DANGER, WARNING and CAUTION) are

used to identify levels of hazard seriousness. Definitions

for identifying hazard levels are provided below with their

respective signal words.

% DANGER:

Immediate hazards which WILL result in severe

personal injury or death.

& CAUTION:

Hazards or unsafe practices which COULD result in

severe personal injury or death.

$ WARNING:

Hazards or unsafe practices which COULD result in

minor personal injury or product or property damage.

? NOTE:

Useful information for operation and/or maintenance.

It is assumed that these heat pump air conditioners will be

operated and serviced by English speaking people. If this is

not the case, the customer should add safety, caution and

operating signs in the native language.

If you have any questions, contact your distributor or dealer

of HITACHI.

This manual gives a common description and information for

this heat pump air conditioner which you operate as well as

for other models.

These heat pump air conditioners have been designed for

the following temperatures. Operate the heat pump air

conditioner within this range.

Temperature Range (°C):

Maximum Minimum

Indoor 30 DB / 25 WB 21.5 DB / 15 WBCooling

Operation

Outdoor 43 DB -5 DB *1)

Indoor 27 DB 15 DBHeating

Operation

outdoor 15 WB -15 WB *2)

*1): 10DB ~ -5DB (Operation Control Range)

*2): -10WB ~ -15WB (Operation Control Range)

DB: Dry Bulb, WB: Wet Bulb

SAFETY SUMMARY

% DANGER:

– Use refrigerant R407C in the refrigerant cycle. Do not

charge oxygen, acetylene or other flammable and

poisonous gases into the refrigerant cycle when

performing a leakage test or an air-tight test. These

types of gases are extremely dangerous and can

cause an explosion. It is recommended that

compressed air, nitrogen or refrigerant be used for

these types of tests.

– Do not pour water into the indoor unit, outdoor unit or

CH unit. These products are equipped with electrical

parts. If poured, it will cause a serious electrical shock.

– Do not touch or adjust safety devices inside the indoor

or outdoor units. If these devices are touched or

readjusted, it may cause a serious accident.

– Do not open the service cover or access panel for the

indoor or outdoor units without turning OFF the main

power supply.

– Refrigerant leakage can cause difficulty with breathing

due to insufficient air. Turn OFF the main switch, put

out fire at once and contact your service contractor, if

refrigerant leakage occurs.

– The installer and system specialist shall secure safety

against leakage according to local regulations or

standards.

$ WARNING:

– Do not use any sprays such as insecticide, lacquer,

hair spray or other flammable gases within

approximately one (1) meter from the system.

– If circuit breaker or fuse is often activated, stop the

system and contact your service contractor.

– Do not perform installation work, refrigerant piping

work, drain piping and electrical wiring connection

without referring to our installation manual.

– Check that the ground wire is securely connected.

Connect a fuse of specified capacity. Do not put any

foreign material on the unit or inside the unit. Make

sure that the outdoor unit is not covered with snow or

ice, before operation.

& CAUTION:

– Do not install the indoor unit, outdoor unit, CH unit,

remote control switch and cable within approximately 3

meters from strong electromagnetic wave radiators

such as medical equipment.

– Supply electrical power to the system to energize the

oil heater for 12 hours before start-up after a long

shutdown.

? NOTE:

– It is recommended that the room be ventilated every 3

to 4 hours.

– The heating capacity of the heat pump unit declines

according to the outdoor air temperature. Therefore, it

is recommended that auxiliary heating equipment be

used in the field when the unit is installed in a low

temperature region.

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CONTENTS

0 CONTENTS

PART I TECHNICAL DATA

1 SYSTEM DESCRIPTION _____________ 1/1

1.1 Features and Benefits _______________ 1/2

1.2 Features on Indoor Units and Outdoor

Units _____________________________ 1/8

1.3 Name of parts_____________________ 1/13

2 GENERAL DATA ___________________ 2/1

2.1. General Data for Indoor Units__________ 2/2

2.2. General Data for Outdoors Units _______ 2/9

2.3. Component Data __________________ 2/11

3 DIMENSIONAL DATA _______________ 3/1

3.1. Indoor Units _______________________ 3/2

3.2. Outdoor Units _____________________ 3/18

4 CAPACITIES AND

SELECTION DATA _________________ 4/1

4.1. System Selection Procedure __________ 4/2

4.2. Operation Space____________________ 4/5

4.3. Capacity Characteristic Curves of

Outdoor Units ______________________ 4/8

4.4. Cooling Capacity Table of 100%

Combination ______________________ 4/11

4.5. Heating Capacity Table of 100%

Combination ______________________ 4/12

4.6. Correction Factor According to Piping

Length __________________________ 4/14

4.7. Sensible Heat Factor (SHF) __________ 4/16

4.8. Correction Factor For Defrosting

Operation ________________________ 4/17

4.9. Fan Performance __________________ 4/17

4.10. Temperature Distribution Diagrams ____ 4/19

4.11. Sound Data_______________________ 4/24

5 WORKING RANGE _________________ 5/1

5.1. Power supply ______________________ 5/2

6 ELECTRICAL DATA ________________ 6/1

6.1. Indoor Unit ________________________ 6/2

6.2. Outdoor Unit _______________________ 6/3

7 ELECTRICAL WIRING

DIAGRAMS _______________________ 7/1

8 REFRIGERANT CYCLE______________ 8/1

8.1 Outdoor Units ______________________ 8/2

8.2 CH - Units _________________________ 8/9

9. CONTROL SYSTEM ________________ 9/1

9.1. Device Control System _______________ 9/2

9.2. Indoor Unit PCB ____________________ 9/6

9.3. Outdoor Unit PCB___________________ 9/9

9.4. Protection and Safety Control_________ 9/12

9.5. Safety and Control Device Setting _____ 9/12

9.6. Standard Operation Sequence ________ 9/13

9.7. Standard Control Functions __________ 9/26

10 AVAILABLE OPTIONAL

FUNCTIONS______________________ 10/1

10.1. Indoor Unit (except RPK) ____________ 10/2

10.2. Indoor Unit (RPK only) ______________ 10/8

10.3 Outdoor Units ____________________ 10/12

10.4. Optional Functions Available Through

Remote Control Switch_____________ 10/19

10.5 Optional Functions Available Through

Remote Control Switch (PC-P5H) ____ 10/25

10.6 Optional Functions Available Through

Wireless Remote Control Switch

(PC-LH3 + Receiver) ______________ 10/26

11 REMOTE CONTROLLERS

OPERATION _____________________ 11/1

11.1 Liquid Crystal Remote Control Switch

(PC-P1HE) _______________________ 11/2

11.2 Optional Remote Controller (PC-5H) ___ 11/7

11.3 Optional Wireless Remote Control

Switch, PC-LH3A __________________ 11/8

11.4 Optional 7-Day Timer (PSC-5T) ______ 11/13

11.5 Optional Central Station (PSC-5S) ____ 11/18

11.6 Optional Accessories for RCS _______ 11/24

CONTENTS

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PART II INSTALATION DATA

12 UNITS INSTALLATION _____________ 12/1

12.1 Transportation and Handling _________ 12/3

12.2 RCI (4-Way Cassette Type) __________ 12/4

12.3 RCD (2-Way Cassette Type) _________ 12/8

12.4 RPC (Ceiling Type)________________ 12/12

12.5 RPI (In-the-Ceiling) _______________ 12/15

12.6 RPK (Wall Type)__________________ 12/17

12.7 RPF (Floor Type) /

RPFI (Floor Concealed Type)________ 12/19

12.8 RAS (Outdoor Unit) _______________ 12/21

12.9 Transportation and Installation of

CH Unit_________________________ 12/39

12.10 Optional Accessories ______________ 12/42

12.11 Outdoor Unit Drain-Kit (DBS-26) _____ 12/46

13 REFRIGERANT PIPING

AND REFRIGERANT

CHARGE ________________________ 13/1

13.1 Refrigerant Piping Selection __________ 13/2

13.2 Distributor Line Branch and Header

Branch _________________________ 13/10

13.3 Piping Work Connection

Considerations ___________________ 13/19

13.4 Indoor Unit Piping Work Connection __ 13/24

13.5 Outdoor Unit Piping Work Connection _ 13/28

13.6 Refrigerant Charging Quantity _______ 13/34

13.7 Vacuum and Refrigerant Charge _____ 13/46

13.8 Caution on Refrigerant Leakage______ 13/47

14 DRAIN PIPING ____________________ 14/1

14.1 General__________________________ 14/2

14.2 RCI (4-Way Cassette Type) __________ 14/3

14.3 RCD (2-Way Cassette Type) _________ 14/3

14.4 RPC (Ceiling Type)_________________ 14/4

14.5 RPI (In-the-Ceiling Type) ____________ 14/5

14.6 RPK (Wall Type)___________________ 14/6

14.7 RPF and RPFI (Floor Type and Floor

Concealed Type) __________________ 14/6

14.8 Outdoor Unit Drain-kit (DSB-26)_______ 14/6

15 ELECTRICAL WIRING _____________ 15/1

15.1 General Check ____________________ 15/2

15.2 Electrical Wiring for Outdoor Units _____ 15/2

15.3 Electrical Wiring for Indoor Units ______ 15/4

15.4 Common Wiring ___________________ 15/9

15.5 Wire Sizes ______________________ 15/13

16 INSTALLATION OF

OPTIONAL REMOTE

CONTROLLER____________________ 16/1

16.1 Installation of Remote Control Switch

<PC-P1HE> ______________________ 16/3

16.2 Installation of Remote Control Switch

(Core-Function) <PC-P5H> __________ 16/6

16.3 Installation of Central Station

<PSC-5S>________________________ 16/9

16.4 Installation of 7-day Timer

<PSC-5T>_______________________ 16/18

16.5 Installation of Receiver Kit

<PC-RLH4> _____________________ 16/22

16.6 Installation of Receiver Kit

<PC-RLH9> _____________________ 16/24

16.7 Installation of Receiver Kit

<PC-RLH11> ____________________ 16/25

16.8 Harc ___________________________ 16/27

16.9 FSG - FXG - G7 - HRG – USB/H-

LINK Connection__________________ 16/30

17 TEST RUN _______________________ 17/1

17.1 Checking Before Test Run ___________ 17/2

17.2 Test run procedure by remote control

switch ___________________________ 17/3

17.3 Test run procedure by WIRELESS

remote control switch (PC-LH3A) ______ 17/4

17.4 Test run from outdoor unit side________ 17/7

17.5 Checking of the refrigerant quantity ___ 17/10

18 TROUBLESHOOTING ______________ 18/1

18.1 Initial Troubleshooting_______________ 18/2

18.2 Alarm Codes______________________ 18/3

18.3 Troubleshooting in Check mode _______ 18/4

18.4 Troubleshooting by 7-segment display _ 18/10

18.5 Protection control code on 7-segment

display _________________________ 18/16

18.6 Self checking of PCB's using Remote

Control Switch____________________ 18/19

18.7 Self Cheking of Remote Control

Switch __________________________ 18/21

19 MAINTENANCE ___________________ 19/1

19.1 Regular Inspection _________________ 19/2

19.2 Filter Cleaning_____________________ 19/3

20 MISCELLANEOUS NOTES __________ 20/1

20.1 Special Notes _____________________ 20/2

21 STANDARD

SPECIFICATIONS _________________ 21/1

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CONTENTS

? NOTE:

MODELS CODIFICATION

Please check, according to the model name, which is your air conditioner type and how it is

abbreviated and referred to in this technical catalogue.

INDOOR UNITS FSN(E) / FSG2(E/M) / FSG2Ei Series

4-Way-Cassette 2-Way-Cassette Ceiling In-The-Ceiling

Code Code Code Code

Model

FSNE FSG2E FSG2Ei

Model

FSN FSG2

Model

FSNE FSG2E FSG2Ei

Model

FSNE FSG2E FSG2Ei

RPI–0.8

7E877302 7E777302 –

RCI–1.0

7E872011 7E772011 –

RCD–1.0

60277813 60277561

RPI–1.0

7E877303 7E777303 –

RCI–1.5

7E872012 7E772012 7E782012

RCD–1.5

60277814 60277562

RPI–1.5

7E877304 7E777304 7E787304

RCI–2.0

7E872013 7E772013 7E782013

RCD–2.0

60277815 60277563

RPC–2.0

7E872055 7E772055 7E782055

RPI–2.0

7E872024 7E772024 7E782024

RCI–2.5

7E872014 7E772014 7E782014

RCD–2.5

60277816 60277564

RPC–2.5

7E872030 7E772030 7E782030

RPI–2.5

7E872025 7E772025 7E782025

RCI–3.0

7E872027 7E772027 7E782027

RCD–3.0

60277817 60277565

RPC–3.0

7E872058 7E772058 7E782058

RPI–3.0

7E872031 7E772031 7E782031

RCI–4.0

7E872028 7E772028 7E782028

RCD–4.0

60277818 60277566

RPC–4.0

7E872059 7E772059 7E782059

RPI–4.0

7E872032 7E772032 7E782032

RCI–5.0

7E872029 7E772029 7E782029

RCD–5.0

60277819 60277567

RPC–5.0

7E872060 7E772060 7E782060

RPI–5.0

7E872033 7E772033 7E782033

RCI RCD RPC RPI

INDOOR UNITS FSN(E) / FSG2(E/M) / FSG2Ei Series

Wall Floor Floor Concealed

Code Code Code

Model

FSG2M

Model

FSNE FSG2E FSG2Ei

Model

FSNE FSG2E FSG2Ei

RPK–1.0

60277720

RPF–1.0

7E877715 7E277715 –

RPFI–1.0

7E877719 7E277719 –

RPK–1.5

60277721

RPF–1.5

7E877716 7E277716 7E787716

RPFI–1.5

7E877720 7E277720 7E787720

RPK–2.0

60277722

RPF–2.0

7E877309 7E277309 7E787309

RPFI–2.0

7E877311 7E277311 7E787311

RPK–2.3

60277723

RPF–2.5

7E877310 7E277310 7E787310

RPFI–2.5

7E877312 7E277312 7E787312

RPK RPF RPFI

CONTENTS

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OUTDOOR UNITS FSG/FSG1/FXG/FXG1

RAS–5FSG 60271994

RAS–8FSG 60271995

RAS–8FXG 60272062

RAS–10FSG 60271996

RAS–10FXG 60272063

RAS–16FSG 60272037

RAS–20FSG 60272038

RAS–20FXG1 60278688

RAS–24FSG1 60278657

RAS–30FSG1 60278658

RAS–30FXG1 60278689

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CONTENTS

CODE LIST ACCESSORIES

Accesory Name Code

Figure

D-P6V

Drier R407C 600199376

D-P10V Drier R407C 600199377

D-P20V Drier R407C 600199378

PC-P5H Optional Remote Controller 60290879

PC-RLH11 Receiver Kit (2-Wires) 60299961

PC-RLH9 Receiver Kit (2-Wires) 60290925

PC-RLH4 Receiver Kit (3-Wires) 60299911

PC-LH3A Wireless Control Switch 62299909

PCC 1A Optional Function Connector 60199286

(not shown)

PC-P1HE Remote Control Switch 7E799954

PC-2H2 Remote Control Switch 60299908

PRC-10E 3P Extension Cord 6E290211

PRC-15E 3P-Extension Cord 6E290212

PRC-20E 3P-Extension Cord 6E290213

PRC-30E 3P-Extension Cord 6E290214

PRC-10E1 2P Extension Cord 7E790211

PRC-15E1 2P-Extension Cord 7E790212

PRC-20E1 2P-Extension Cord 7E790213

PRC-30E1 2P-Extension Cord 7E790214

CONTENTS

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Accesory Name Code

Figure

PSC-5S Central Station 60299956

PSC-5T 7 Day Timer 60299957

P-G12WA2E Air Panel 7E799515

P-G12WAH2E Air Panel wireless control 7E799516

P-G23WA2E Air Panel 7E299496

P-G23WA2E1 Air Panel with heater 7E299486

P-G23WAH2E Air Panel wireless control 7E299497

P-G23WAH2E1

Air Panel with heater and wireless

control

7E299488

P-G46WA2E Air Panel 7E299498

P-G46WA2E1 Air Panel with heater 7E299487

P-G46WAH2E Air Panel wireless control 7E299499

P-G46WAH2E1

Air Panel with heater and wireless

control

7E299489

P-G23DWA1 Air Panel 60299570

P-G46DWA1 Air Panel 60299571

THM-R2AE Remote Sensor (THM4) 7E799907

DBS-26 Drain Discharging Boss 60299192

HARC-BXE Interface 60290874

HARC-40E Interface 17B28840-B

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CONTENTS

Accesory Name Code

Figure

E-42ME1 Branch pipe 7E790229

E-52ME1 Branch pipe 7E790230

E-82ME1 Branch pipe 7E790231

E-102ME1 Branch pipe 7E790232

E-152S Branch pipe –

E-162M1 Branch pipe 7E799965

E-202M1 Branch pipe 7E799966

E-242S Branch pipe 60290696

E-302S Branch pipe 60290697

E-52XME1 Branch pipe 7E790234

E-82XME1 Branch pipe 7E790235

E-102XME1 Branch pipe 7E790237

E-152X Branch pipe 60291014

E-242X Branch pipe 60291015

E-302XME1 Branch pipe 60291016

E-54SE Header 6E290268

E-58SE Header 6E290269

E-865E3 Header 6E290243

E-885E3 Header 6E290244

E-88XE3 Header 6E290242

SYSTEM DESCRIPTION

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1 SYSTEM DESCRIPTION

CONTENTS

1 SYSTEM DESCRIPTION ___________________________________________________ 1

1.1 Features and benefits ______________________________________________________ 2

1.2 Features on Indoor Units and Outdoor Units_____________________________________ 8

1.2.1 RCI - Four Way Cassette Type _______________________________________________ 8

1.2.2 RCD - Two-Way Cassette Type _______________________________________________ 9

1.2.3 RPC - Ceiling Type_________________________________________________________ 9

1.2.4 RPI – In-The-ceiling Type___________________________________________________ 10

1.2.5 RPK - Wall Type__________________________________________________________ 11

1.2.6 RPF - Floor Type _________________________________________________________ 11

1.2.7 RPFI - Floor Concealed Type________________________________________________ 11

1.2.8 Slim and Compact Outdoor Unit______________________________________________ 12

1.3 Name of parts ___________________________________________________________ 13

1.3.1 Indoor Units _____________________________________________________________ 13

1.3.2 Outoor Units _____________________________________________________________ 17

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SYSTEM DESCRIPTION

1.1 FEATURES AND BENEFITS

n New HI-MULTI SET-FREE FSG(1) / FXG(1)

Series

HITACHI proudly introduces the New line up of SET FREE

FSG(1) 5-30 HP and FXG(1) 8-30 HP in order to respond

the request of air conditioning markets, for big capacity

units.

SET FREE series, are the highly-efficient ,reliable and

flexible in air conditioning system, for the markets.

Recently, increased numbers of buildings are requiring

"Intelligent" facilities - communication networks, office

automation, including a comfortable environment. In addition

to that, energy saving operation is needed. Particularly,

comfortable space is required all the day through the year in

shops and office buildings. This split air conditioner, " SET

FREE System " can meet these requirements. The proven

combination of the scroll compressor and the inverter

provides the best air conditioning for office buildings and

hotels.

§ New Outdoor units 24-30HP FSG1 and 20-30HP

FXG1

§ New CH-Box 11.5G

§ New Indoor units 2.0 and 2.5 RPF(I)

§ Connectable up to : Maximum 32 Indoor Units each

Outdoor Unit (30 HP) .

§ Maximum Total Combination horsepower of 130%

§ Refrigerant: R407C

n

Various Indoor units and combinations

The new line-up of new SET FREE series indoor units has

been extended up to 38 indoor units in 7 types to find

various building requirements .

Nominal Horsepower

(HP)

Indoor Unit

Type

0.8 1.0 1.5 2.0 2.5 3.0 4.0 5.0

RCI-

-

OOOOOOO

RCD-

-

OOOOOOO

RPC-

-

- - OOOOO

RPI-

O

OOOOOOO

RPK-M

-

OOO

O(2.3)

---

RPF-

-

OOOO - - -

RPFI-

-

OOOO - - -

O: AVAILABLE

n Minimum and maximim combination of Outdoor and Indoor Units

Indoor Unit

Outdoor Unit Model

Minimum

Combination

Horsepower (HP)

Maximum

Combination

Horsepower (HP)

Minimum

Combination

of Indoor Unit

Maximum

Combination

of Indoor Unit

Minimum

Individual

Operation

Horsepower (HP)

RAS-5FSG 2.5 6.5 1 8 0.8

RAS-8FSG 4.0 10.4 2 12 0.8

RAS-10FSG 5.0 13.0 2 12 0.8

RAS-16FSG 8.0 20.8 2 13 (16)

1

1.5 (1.3)

1

RAS-20FSG 10.0 26.0 2 16 1.5

RAS-24FSG1 12.0 31.0 2 27 1.0

2

RAS-30FSG1 15.0 39.0 2 32 1.0

2

RAS-8FXG 4.0 10.4 2 12 0.8

RAS-10FXG 5.0 13.0 2 12 0.8

RAS-20FXG1 10.0 26.0 2 16 0.8

3

RAS-30FXG1 15.0 39.0 2 32 0.8

4

CH-4.0GE 0.8 Less than 4.0 1 3

5

0.8

CH-6.5GE 0.8 Less than 6.5 1 6

5

0.8

CH Unit

Model

CH-11.5G 0.8 6.5 and 11.5 (incl.) 1 8

5

0.8

1) In case of changing the capacity from 1.0HP or 1.5HP to 1.3HP by DIP switch setting (see chapter 9).

2) In case that 1.0HP is used, the maximum quantity of 1.0HP indoor unit shall be 12

3) In case that 0.8HP or 1.0HP Indoor Units are used, the maximum quantity of 0.8HP and 1.0HP Indoor Unit shall be 10

4) In case that 0.8HP or 1.0HP Indoor Units are used, the maximum quantity of 0.8HP and 1.0HP Indoor Unit shall be 12

5) Simultaneous operation of cooling (dry) and heating is not available

SYSTEM DESCRIPTION

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n

High economical efficiency operation

HITACHI use the high technology to achieve the high

operation efficiency. The applications of the following

technologies provide HITACHI to achieve results like the

great power saving due to heat recovery system. During

Simultaneous cooling and heating operation, only for

FXG(1), energy is saved by the heat exchange between

indoor units.

These technologies are:

n

Supercooling Circuit

Performance improved by high-efficiency plate type of heat

exchanger.

n

DC Fan Motor with Outstanding Efficiency

The DC fan motor greatly improves efficiency compared

with conventional products having an AC motor. Also, air

blasts are reduced by controlling the rotation speed of the

fan.

n DC Compressor Using Neodymium Magnet

A DC compressor is used for all models, thus greatly

increasing efficiency in all operating areas. In particular,

performance at a low speed, which affects the annual

running cost, has greatly improved. Moreover, the peculiar

electromagnetic noise to DC compressors has been cut by

optimizing the rotor shape of the compressor.

n New Heat Exchanger

The new smaller flow resistance heat exchanger using new

aluminum fins and pressure loss in pipe decreases with

optimized path alignment provides power saving.

Also, it has achieved a lower sound operation due to lower

fan revolution.

Air flow

resistance

decreased by

20%.

The optimized slit

shape minimizes

noise by reducing

air intake

resistance

Heat

Exchanger

optimized by

2-gas, 1-liquid

path

arrangement.

n

DC Inverter Plus CBC (Condenser Best Control)

*1)

The DC inverter controls compressor speeds from 30Hz to 115Hz, reaching quickly at a set temperature and maintaining a

stable energy-saving operation.

■ Concept of operation (in Heating Mode)

Set temperature

Set-Free

Present Machine

with constant

speed

Room Temperature

Time

■ In case of Set-Free

Quickly reaches set temperature with high power, then maintains stable

energy-saving operation.

■ In case of Existing Machine with Constant Speed

Slowly reaches set temperature, then turns on and off repeatedly to maintain

the temperature, causing uneconomical operation

Present Machine

with constant

speed

Set-Free

Compressor (rpm)

Time

Motor Efficiency (%)

Revolutions per Min. (rpm)

AC Motor

DC Motor

Efficiency increased by 40%.

(motor input halved)

Motor Efficiency (%)

Revolutions per Min. (rpm)

AC Motor

DC Motor

Rotor shape

optimized

Neodymiun

magnet adopted

Compressor

rotor

High Power Operation Energy-saving Operation

I

n case o

f

ex

i

s

ti

ng mac

hi

nes w

ith

cons

t

an

t

spee

d

,

repeated turning on and off wastes energy.

Size of heat

exchanger

increased.

Performance

improved by

placing the

sub-cooler on

the wind ward.

By controlling

the electronic

expansion

valve with a

micro

computer, the

refrigeration

cycle is

optimized.

AIR

LIQUID

GAS

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SYSTEM DESCRIPTION

n Top Class Silence Operation

HITACHI use the high technology to achieve the Lowest

sound possible

These Technologies are:

§ PWM ( Pulse With Modulation) Control

Fan motor control by PWM has realized low

electromagnetic sounds remarkably.

§ Low Operation Sound Resulting from New Fan Shape

and Propeller Fan Material

The combination of most appropriate fan shape for

smooth air flow and a new material of Mica

polypropylene has resulted in a low operation sound

which was almost impractical in previous units.

§ Low Sound Operation by Low Noise Fan Motor

Aluminum die-casting was used for assembled fan

motor and low sound operation has been achieved.

And due to a non resonance suspension structure, the

vibration sound has been minimized.

n

Lower Sound Operation during Night Time

By improved at around of cabinet structure and fan

shape, and by the adoption of new material and inverter,

operation sound has been reduced.

n Reliability

HITACHI use the inverter technology to achieve the Less

failures than the standard compressors. The system

never stop and the quantity of the refrigerant than the

system request is proportional to speed compressor. The

speed compressor is proportional to frequency work ( 30-

Hz to 115Hz).

n

Flexibility

§ Flexibility Refrigerant Piping:

With the new Systems 24-30 HP FSG1 and 20-30 HP

FXG1, can achieve possible to extend longer

refrigerant piping to request for Tall Buildings.

Maximum total piping length between outdoor and

indoor units :120m FSG1 and 100m FXG1

Maximum vertical lift between indoor and outdoor unit:

50m (40 when O.U are lower than I.U)

Maximum vertical lift among indoor units: 15m.

§ Flexibility of Indoor Unit Control

CS –NET system is the developed Computer

Controlled Network System from HITACHI for SET-

FREE multi-split air conditioners.

PSC-5S : Is a central station. It allows to control 8

outdoor units with 16 indoor unit each one

PC-P1HE: Is a remote control. It allows to control 1

outdoor unit with 16 indoor unit

PC-LH3A: Is a wireless remote control switch

PC-P5H: : Is a remote control. It allows to control 1

outdoor unit with 16 indoor unit

§ Flexibility of Piping Systems (see page 6).

n

H-LINK System

The H-LINK wiring system requires only two transmission

wires connecting each CH unit and outdoor unit for up to

16 refrigerant cycles, and connecting wires for all indoor

units and all outdoor units in series.

The new system will give the following advantages:

§ Easy and flexible installation.

§ Non polarity.

§ Freely Combinable.

§ CS-Net Connection via Indoor or Outdoor Unit

§ Maximum 128 Indoor Units

§ Maximum length: 1000 m

Example of H-LINK System

Specifications:

Transmission Wire: 2 - Wire

Polarity of Transmission Wire: Non - Polar Wire

Maximum Outdoor Units 16 Units per H-LINK system

Maximum Indoor Units 128 Units per H-LINK System

Maximum Wiring Length: Total 1000 m (including CS-NET)

Recommended Cable: Twisted Shielded Pair Cable, over

0,75 mm² (Equivalent to KPEV-S)

Voltage: DC5V

? NOTE:

In case of applying the H-LINK system, the setting of

dip switches is required. If the dip switches are not set

or set incorrectly, the alarm may occur due to the

transmission failure.

Total wiring length for remote control switch can be

extended up to 500m. If total wiring length less than

30m, it is possible to use the normal wiring (0.3mm²).

Outdoor Unit

Transmission

Wires

Refrigerant Piping

Indoor Units

: One Refrigerant Cycle

SYSTEM DESCRIPTION

1

/

5

Setting of End Terminal Resistance

Before shipment, No.1 pin of DSW10 is set at the “ON” side.

In the case that the outdoor units quantity in the same H-link

is 2 or more, set No.1 pin of DSW10 at the “OFF” side from

the 2

nd

unit. If only one outdoor unit is used, no setting is

required.

Setting of End terminal Resistance DSW10

Before Shipment Cancellation

ON

1 2

ON

1 2

Wide Operation Range

This unit has been designed for cooling operation under low

ambient temperatures down to -5 ºC.

This feature enables cooling to be obtained even in winter

on buildings with high internal heat gains due to lighting,

people and machines, particularly in areas such as shops,

lecture rooms, data processing areas etc.

And the heating operation under low ambient temperature

down to -15 ºC can be also performed.

n Electronical capacity control

Precise Control with the wide Range Inverter

The compressor speed for Set-Free series outdoor unit is

controlled within a wide range of from 30Hz to 115Hz.

Therefore, smooth operation is available without frequently

using the ON/OFF control. This new wide range capacity

control can meet not only the needs of a wide space but

also a small space such as guest rooms and management

rooms. Defrosting operation can be quickly performed

because of a high compressor speed of 70~75Hz.

Electronic Control

The capacity of the Outdoor unit is continuously controlled

by the inverter from 3.3% to 130%. This wide working range

has been obtained by the improvement of shaft strength and

high pressure oil circulation in the scroll compressor.

Therefore, an air conditioning system where heat load is

greatly changed through the day is easily catered for.

Also, the capacity of indoor unit is controlled by detecting

the inlet and set room temperatures using an inverter driven

compressor. Therefore even a small room can be air

conditioned without unwanted ON/OFF operation, resulting

in comfortable air conditioning.

Standard Unit

Inverter Driver Unit

RPI-0.8

(Director Room)

Less ON/OFF

Ensuring Comfort

Operation

RCI-2.5

(Office)

STOP

RCI-2.5

(Office)

STOP

RCI-2.5

(Office)

STOP

RCI-1.5

(Reception

Office)

STOP

Capacity Control

(8%:10HP of

outdoor unit

capacity) of Director

Room is still

possible.

Only for pull-down Operation

Outdoor Air

Wet Bulb

Temperature

(°C WB)

Outdoor Air

Dry Bulb

Temperature

(°C DB)

Indoor suction air Wet Bulb

Temperature (°C WB)

Indoor suction air Dry Bulb

Temperature (°C DB)

: Operation Control Range

Inlet Air Temperature

Outlet Air Temperature

Time

10 min.

Cooling Operation

(Setting Temperature

of Thermostat: 23 ºC

Cooling Operation

(Setting Temperature

of Thermostat: 23 ºC)

Inverter Frequency

Inlet Air Temperature

Outlet Air Temperature

Time

10 min.

Inverter Control of Set-Free System

(Example 10 HP)

115Hz ➠ 30Hz (26%)

 Improvement of

Shaft Strength

Wide

Operating

Range

 High Pressure

Oil Circulation

8%

1

/

6

SYSTEM DESCRIPTION

Drying Operation Control

This system combining the inverter speed control with

indoor air volume control performs efficient dehumidification

with negligible change in room temperature (see graphic)

Room Temperature and Humidity Variation During Dry Operation

Air Conditioning Drying Air Conditioning

Humidity (%) Room Temp. (°C)

Time

Individual Operation at Minimum Indoor Unit power

The electronic expansion valves installed not only in the

outdoor unit, but also in each indoor unit, control the

refrigerant flow. Hitachi achieves the reduction of the

minimum capacity up to 0.8 HP Indoor Unit to connect 20

and 30HP FXG1 Outdoor Units.

Trial operation and Self-Diagnosing by Multi-Function

Remote Control Switch and Printed Circuit Board in

Outdoor Unit

A high quality control by the new remote control switch has

been developed. The self-diagnosing function, which

enables quick checking of operation conditions in the indoor

units and outdoor unit, has been newly equipped.

Furthermore, alarm data can be put into the memory of a

micro-computer when an abnormality occurs.

A self-diagnosing function for printed circuit boards is also

available. Various operation data such as expansion valve

opening, etc. are indicated on the 7-segments on the printed

circuit board in the outdoor unit.

By these functions, saving of maintenance period and labor

during the trial operation and servicing has been achieved.

Greatly Minimized Piping Work by HITACHI "Uni-Piping

System"

The "Uni-Piping" system where the same size pipe as the

main refrigerant pipe can be utilized, has been developed.

Due to this single size, piping work has been greatly

simplified.

Also, from the point of design, complicated piping selection

has been minimized. Only two refrigerant pipes in the

refrigeration cycle are required. Various piping connection

sets are also available according to field requirements.

Due to these improvements, various problems during

installation have been solved. The new HITACHI "Uni-Piping

System" is the epoch-making system which saves

installation time and labour.

The "Uni-Piping System" is allowed up to 10HP.

Piping System for Set-Free Series

System Example 1: Line Branch System

System Example 2: Header Branch System

System Example 3: Combination Branch System

■ Diagnosing using the Remote Control Switch

Printed circuit boards (PCBs) can be checked using the

LCD (Liquid Crystal Display) remote control switch.

Therefore, diagnosing for PCBs at the site is quickly and

accurately performed.

■ Data Memory in the Remote Control Switch

In the case that an abnormality occurs, the LCD remote

control switch will indicate an alarm code so that quick

diagnosing is available at the site.

Operation in the

same mode

CH Unit

(for FXG only)

CH Unit

(for FXG only)

Operation in the

same mode

CH Unit

(for FXG only

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Hitachi FXG1 Series Technical Catalogue

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