Hitachi FSXN Series User manual

SET FREE SERIES
FSXN
Service Manual
RAS-8FSXN
RAS-10FSXN
RAS-12FSXN
RAS-14FSXN
RAS-16FSXN
RAS-18FSXN
RAS-20FSXN
RAS-22FSXN
RAS-24FSXN
RAS-26FSXN
RAS-28FSXN
RAS-30FSXN
RAS-32FSXN
RAS-34FSXN
RAS-36FSXN
RAS-38FSXN
RAS-40FSXN
RAS-42FSXN
RAS-44FSXN
RAS-46FSXN
RAS-48FSXN
RAS-50FSXN
RAS-52FSXN
RAS-54FSXN

Index
Index
i
SMGB0065 rev. 1 - 12/2010
General information 1
Unit installation 2
Piping work and refrigerant charge 3
Electrical wiring 4
Control system 5
Optional functions 6
Test run 7
Troubleshooting 8
Spare parts 9
Servicing 10
Electrical checks of the main parts 11
Maintenance notes 12

Index
1General information......................................................................................... 1
1.1 General information.................................................................................................................... 2
1.1.1 Copyright..................................................................................................................................... 2
1.1.2 Introduction................................................................................................................................. 2
1.1.3 Environment-friendly units.......................................................................................................... 2
1.2 Safety......................................................................................................................................... 3
1.2.1 Symbols used............................................................................................................................. 3
1.3 Product guide............................................................................................................................. 4
1.3.1 Classification of outdoor unit models and CH units.................................................................... 4
1.3.2 Product guide: Outdoor units...................................................................................................... 4
1.3.3 Accessory code list..................................................................................................................... 6
2Unit installation................................................................................................ 7
2.1 Outdoor unit................................................................................................................................ 8
2.1.1 Preliminary conditions for positioning of outdoor unit................................................................. 8
2.1.2 Transport, lifting and handling of the units.................................................................................. 8
2.1.3 Installation space RAS-(8-18)FSXN........................................................................................... 10
2.1.4 Center of gravity.......................................................................................................................... 11
2.1.5 Installation................................................................................................................................... 11
2.1.6 Foundation and anchorage of outdoor unit................................................................................. 20
2.2 CH units...................................................................................................................................... 22
2.2.1 Transportation and handling CH units........................................................................................ 22
2.2.2 CH unit installation...................................................................................................................... 22
3Piping work and refrigerant charge............................................................... 29
3.1 Outdoor unit................................................................................................................................ 30
3.1.1 Refrigerant pipe selection........................................................................................................... 30
3.1.2 Copper pipes, sizes, connection and insulation.......................................................................... 30
3.1.3 Pipe connection kit...................................................................................................................... 36
3.1.4 Precautions for the installation of the outdoor unit...................................................................... 38
3.1.5 General instructions on the installation of refrigerant pipes........................................................ 39
3.1.6 Refrigerant pipe connection for heat pump systems (2 pipes).................................................... 41
3.1.7 Refrigerant pipe connection for heat recovery systems (3 pipes)............................................... 49
3.1.8 Refrigerant charge...................................................................................................................... 58
3.1.9 Precautions in the event of refrigerant leaks............................................................................... 63
3.1.10 Drainage pipes............................................................................................................................ 64
3.2 CH unit....................................................................................................................................... 66
3.2.1 Considerations............................................................................................................................ 66
3.2.2 Piping materials.......................................................................................................................... 66
3.2.3 Cautions for piping connection work........................................................................................... 66
3.2.4 Refrigerant piping work............................................................................................................... 67
4Electrical wiring............................................................................................... 71
4.1 Outdoor unit................................................................................................................................ 72
4.1.1 General information.................................................................................................................... 72
4.1.2 General verifications................................................................................................................... 72
4.1.3 Connection of the power supply circuits..................................................................................... 73
Index
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SMGB0065 rev. 1 - 12/2010

4.1.4 Setting of the DSW switches on PCB1....................................................................................... 78
4.1.5 Electrical wiring diagram RAS-(8–18)FSXN............................................................................... 82
4.2 CH unit....................................................................................................................................... 83
4.2.1 General information.................................................................................................................... 83
4.2.2 General verifications................................................................................................................... 83
4.2.3 Electrical wiring connection CH units.......................................................................................... 83
5Control system................................................................................................. 87
5.1 Control system........................................................................................................................... 88
5.1.1 Cycle control............................................................................................................................... 88
5.1.2 Compressor operation control..................................................................................................... 89
5.1.3 Heat exchanger mode control..................................................................................................... 94
5.1.4 Outline of the control system...................................................................................................... 95
5.2 Standard operation sequence.................................................................................................... 97
5.2.1 Cooling operation........................................................................................................................ 97
5.2.2 Cooling operation (continued)..................................................................................................... 98
5.2.3 Dry operation.............................................................................................................................. 99
5.2.4 Dry operation (continued)........................................................................................................... 100
5.2.5 Antifreeze protection control during the cooling or dry operation................................................ 101
5.2.6 Heating operation........................................................................................................................ 102
5.2.7 Heating operation (continued)..................................................................................................... 103
5.2.8 Defrost operation........................................................................................................................ 104
5.2.9 Excessive high discharge air temperature prevention control (only for RCI, RCD and RPI (≤ 6
HP))............................................................................................................................................. 105
5.2.10 Protection control........................................................................................................................ 106
5.2.11 Control of CH unit (CH-(6.0/10.0)N1).......................................................................................... 109
5.3 Control and safety devices......................................................................................................... 111
5.3.1 Outdoor unit................................................................................................................................ 111
5.3.2 CH unit........................................................................................................................................ 111
6Optional functions........................................................................................... 113
6.1 Setting method........................................................................................................................... 114
6.2 External input and output setting................................................................................................ 115
6.2.1 External input function setting..................................................................................................... 116
6.2.2 External output function setting................................................................................................... 120
6.3 Function setting.......................................................................................................................... 123
6.3.1 Indoor unit fan control during the Thermo-OFF in heating mode................................................ 130
6.3.2 Night-shift (Low noise)................................................................................................................ 131
6.3.3 Cancellation of the outdoor ambient temperature limit............................................................... 132
6.3.4 Defrost for cold area (change of defrost condition)..................................................................... 133
6.3.5 SLo defrost setting...................................................................................................................... 133
6.3.6 Cancellation of hot start.............................................................................................................. 133
6.3.7 Demand function setting............................................................................................................. 133
6.3.8 Wave function setting.................................................................................................................. 134
6.3.9 Cold draft protection.................................................................................................................... 134
6.3.10 Adjustment of fan rotation........................................................................................................... 134
7Test run............................................................................................................. 135
7.1 Preliminary checks..................................................................................................................... 136
Index
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SMGB0065 rev. 1 - 12/2010

7.2 Test run...................................................................................................................................... 137
7.2.1 Before the test run...................................................................................................................... 137
7.2.2 Test run using the remote control switch.................................................................................... 138
7.2.3 Test run from the outdoor unit..................................................................................................... 138
7.2.4 Checking at test run.................................................................................................................... 140
7.2.5 Refrigerant cycle checklist.......................................................................................................... 141
7.2.6 Automatic judgement system for refrigerant amount.................................................................. 143
7.2.7 Reset for accumulated operation time of compressor 1-2 after maintenance (cUJ1-cUJ2)....... 145
7.2.8 Test run check list....................................................................................................................... 146
8Troubleshooting.............................................................................................. 147
8.1 Initial troubleshooting................................................................................................................. 148
8.1.1 Checking the electrical wires and the power source .................................................................. 148
8.1.2 Checking by 7-segment display.................................................................................................. 149
8.1.3 Checking of the alarm code history............................................................................................. 150
8.1.4 Emergency operation.................................................................................................................. 153
8.1.5 Failure of the power supply to the indoor units and the remote control switch........................... 158
8.1.6 Abnormal transmission between the remote control switch and the indoor unit......................... 159
8.1.7 Abnormal operation of the devices............................................................................................. 160
8.2 Procedure for troubleshooting.................................................................................................... 168
8.2.1 Alarm codes................................................................................................................................ 168
8.3 Troubleshooting by alarm code.................................................................................................. 170
8.3.1 Alarm codes................................................................................................................................ 170
8.4 Troubleshooting in the check mode by using the remote control switch.................................... 238
8.5 Troubleshooting by using the 7-segment display....................................................................... 245
8.6 RSW, DSWs and LEDs functions............................................................................................... 257
8.7 Checking procedures for each main part................................................................................... 262
8.7.1 Self-checking of PCB using the remote control.......................................................................... 262
8.7.2 Self-checking of the remote control switch................................................................................. 265
8.7.3 Checking procedures for other main parts.................................................................................. 267
9Spare parts....................................................................................................... 275
9.1 Cabinet and fan components for outdoor units.......................................................................... 276
9.1.1 Cabinet and fan components for RAS-(8-12)FSXN.................................................................... 276
9.1.2 Cabinet and fan components for RAS-(14-18)FSXN.................................................................. 278
9.2 Refrigerant cycle components for outdoor units......................................................................... 280
9.2.1 Refrigerant cycle components for RAS-(8-12)FSXN.................................................................. 280
9.2.2 Refrigerant cycle components for RAS-(14-18)FSXN................................................................ 283
9.3 Electrical parts for outdoor units................................................................................................. 286
9.3.1 Electrical box components for RAS-(8-18)FSXN........................................................................ 286
9.3.2 Sub electrical box components for RAS-(14-18)FSXN............................................................... 288
9.4 Refrigerant cycle and electrical parts for CH units..................................................................... 289
10 Servicing........................................................................................................... 291
10.1 Removing the front service cover............................................................................................... 292
10.2 Removing the upper cover......................................................................................................... 293
10.3 Removing the electrical box cover............................................................................................. 294
10.3.1 Removing the electrical box cover for RAS-(8-12)FSXN ........................................................... 294
10.3.2 Removing the electrical box cover for RAS-(14-18)FSXN ......................................................... 294
Index
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SMGB0065 rev. 1 - 12/2010

10.4 Removing the electrical box....................................................................................................... 295
10.4.1 Removing the electrical box for RAS-(8-12)FSXN...................................................................... 295
10.4.2 Removing the electrical box for RAS-(14-18)FSXN.................................................................... 295
10.5 Removing the electrical box stay................................................................................................ 296
10.5.1 Removing the electrical box stay for RAS-(8-12)FSXN.............................................................. 296
10.5.2 Removing the electrical box stay for RAS-(14-18)FSXN............................................................ 296
10.6 Removing the air grille................................................................................................................ 297
10.7 Removing the outdoor fan.......................................................................................................... 298
10.8 Removing the compressor......................................................................................................... 300
10.9 Replacing the refrigerant oil....................................................................................................... 308
10.9.1 No clogging in return oil circuit.................................................................................................... 308
10.9.2 Clogging in return oil circuit......................................................................................................... 309
10.10 Replacing the return oil circuit.................................................................................................... 311
10.11 Removing the coils..................................................................................................................... 312
10.11.1 Removing the expansion valve coil (MV1, MVB)........................................................................ 313
10.11.2 Removing the solenoid valve coil (SVA, SVG)........................................................................... 314
10.11.3 Removing the solenoid valve...................................................................................................... 314
10.11.4 Removing the reversing valve coil (RVR1, RVR2)...................................................................... 315
10.11.5 Removing the reversing valve..................................................................................................... 315
10.12 Removing the stop valve............................................................................................................ 317
10.13 Removing the high pressure switch, high pressure sensor and low pressure sensor................ 318
10.13.1 Removing the high pressure switch (PSH1, PSH2).................................................................... 319
10.13.2 Removing the high pressure sensor (Pd) and low pressure sensor (Ps).................................... 319
10.14 Removing the liquid pipe thermistor........................................................................................... 320
10.15 Removing the ambient temperature thermistor.......................................................................... 322
10.16 Removing other electrical components...................................................................................... 323
10.16.1 Removing the PCB1 and electrical components for the electrical box....................................... 323
10.16.2 Removing the PCB2 for the inverter........................................................................................... 325
10.16.3 Removing the diode module and transistor module.................................................................... 325
10.16.4 Removing the fan controller........................................................................................................ 327
10.16.5 Fitting the electrical box.............................................................................................................. 327
11 Electrical checks of the main parts................................................................ 329
11.1 Inverter....................................................................................................................................... 330
11.1.1 Inverter specifications................................................................................................................. 330
11.1.2 Inverter power Unit structure....................................................................................................... 331
11.1.3 Protection function...................................................................................................................... 332
11.1.4 Overload protection control......................................................................................................... 333
11.2 Scroll compressor....................................................................................................................... 334
11.2.1 Reliable mechanism for low vibration and low sound................................................................. 334
11.2.2 Compression principles............................................................................................................... 334
11.2.3 Structure..................................................................................................................................... 334
11.2.4 Compressor type......................................................................................................................... 335
11.3 Thermistors................................................................................................................................ 336
11.3.1 Thermistor positions.................................................................................................................... 336
11.3.2 Thermistor for the temperature of the upper part of the compressor.......................................... 337
11.3.3 Thermistor for the outdoor ambient temperature........................................................................ 338
11.3.4 Thermistor for the evaporating temperature of the outdoor unit in the heating operation (For
defrosting)................................................................................................................................... 338
Index
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SMGB0065 rev. 1 - 12/2010

11.3.5 Thermistor for super cooling bypass and main line temperature of outdoor unit........................ 338
11.4 Electronic expansion valve......................................................................................................... 339
11.5 Pressure sensor......................................................................................................................... 340
11.5.1 High pressure control.................................................................................................................. 340
11.5.2 Low pressure control................................................................................................................... 340
11.6 High pressure protection device................................................................................................. 341
11.7 Noise filter (NF1, NF2)............................................................................................................... 342
11.8 Capacitors (CB1 and CB2 / CB3)............................................................................................... 344
11.9 Reactor (DCL1 and DCL2)......................................................................................................... 345
12 Maintenance notes.......................................................................................... 347
12.1 Checking the power source and the wiring connection.............................................................. 348
12.2 Burnt-out compressor due to an insufficient refrigerant charge................................................. 349
12.3 Alarm code "31".......................................................................................................................... 350
12.4 Not cooling well due to insufficient installation space for the outdoor unit................................. 351
12.5 Precautions in the event of refrigerant leaks.............................................................................. 352
12.5.1 Maximum permissible concentration of hydrofluorocarbon (HFC).............................................. 352
12.5.2 Calculation of the refrigerant concentration................................................................................ 352
12.5.3 Countermeasures in the event of refrigerant leaks..................................................................... 352
12.6 Maintenance work...................................................................................................................... 354
12.7 Service and maintenance table through the 7-segment display................................................. 355
12.8 Service and maintenance table through the remote control switch............................................ 357
12.9 Service and maintenance table.................................................................................................. 359
12.10 Saturation curve for refrigerant................................................................................................... 361
12.11 Mollier chart for R410A............................................................................................................... 362
12.12 How to collect refrigerant............................................................................................................ 363
Index
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SMGB0065 rev. 1 - 12/2010

1. General information
Index
1.1 General information.................................................................................................................... 2
1.1.1 Copyright....................................................................................................................................... 2
1.1.2 Introduction................................................................................................................................... 2
1.1.3 Environment-friendly units............................................................................................................. 2
1.2 Safety......................................................................................................................................... 3
1.2.1 Symbols used................................................................................................................................ 3
1.3 Product guide............................................................................................................................. 4
1.3.1 Classification of outdoor unit models and CH units....................................................................... 4
1.3.2 Product guide: Outdoor units........................................................................................................ 4
1.3.3 Accessory code list....................................................................................................................... 6
1 General information
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SMGB0065 rev. 1 - 12/2010
1

1.1 General information
1.1.1 Copyright
© Copyright 2010 HITACHI Air Conditioning Products Europe, S.A. – All rights reserved.
No part of this publication may be reproduced, copied, filed or transmitted in any shape or form without the permission of
HITACHI Air Conditioning Products Europe, S.A.
Within the policy of continuous improvement of its products, HITACHI Air Conditioning Products Europe, S.A. reserves the
right to make changes at any time without prior notification and without being compelled to introduce them into products
previously sold. This document may, therefore, have been subject to amendments during the life of the product.
HITACHI makes every effort to offer correct, up-to-date documentation. Despite this, printing errors cannot be controlled
by HITACHI and are not its responsibility.
As a result, some of the images or data used to illustrate this document may not refer to specific models. No claims will be
accepted based on the data, illustrations and descriptions included in this manual.
No type of modification must be made to the equipment without prior, written authorisation from the manufacturer.
1.1.2 Introduction
HITACHI presents the FSXN series, which belongs to the SET FREE series characterised by its modular design. The
application of a single unit, called a base unit (8 - 18 HP) or the combination of two or up to three of these base units of
different powers covers the rest of the range of capacities (20 - 54 HP) for air conditioning in office buildings and small
industry.
The modular concept of the FSXN series offers refrigeration, heating or both simultaneously, to create personalised
environments for every necessity.
1.1.3 Environment-friendly units
The new range of HITACHI outdoor units uses environment-
friendly R410A gas refrigerant and applies RoHS and Green Dot
standards throughout the production and installation process to
reflect HITACHI's awareness of environmental respect and
commitment.
1 General information
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SMGB0065 rev. 1 - 12/2010

1.2 Safety
1.2.1 Symbols used
During normal air conditioning system design work or unit installation, greater attention must be paid in certain situations
requiring particular care in order to avoid injuries and damage to the unit, the installation, the building or property.
Situations that jeopardise the safety of those in the surrounding area or that put the unit itself at risk will be clearly indicated
in this manual.
To indicate these situations, a series of special symbols will be used to clearly identify these situations.
Pay close attention to these symbols and to the messages following them, as your safety and that of others depends on it.
DANGER
•The text following this symbol contains information and instructions relating directly to your safety and
physical wellbeing.
•Not taking these instructions into account could lead to serious, very serious or even fatal injuries to you and
others in the proximities of the unit.
In the texts following the danger symbol you can also find information on safe procedures during unit installation.
CAUTION
•The text following this symbol contains information and instructions relating directly to your safety and
physical wellbeing.
•Not taking these instructions into account could lead to minor injuries to you and others in the proximities of
the unit.
•Not taking these instructions into account could lead to unit damage.
In the texts following the caution symbol you can also find information on safe procedures during unit installation.
N O T E
•The text following this symbol contains information or instructions that may be of use or that require a more
thorough explanation.
•Instructions regarding inspections to be made on unit parts or systems may also be included.
1 General information
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1

1.3 Product guide
1.3.1 Classification of outdoor unit models and CH units
Unit type (outdoor unit): RAS
Position-separating hyphen (fixed)
Capacity (HP): (8-54)
FSX: SET FREE series
N: R410A refrigerant
XXX – XX FSX N
Type of unit: CH (Cooling/Heating Changeover unit)
Position-separating hyphen (fixed)
Maximum capacity of connectable indoor units (HP)
6.0: 6.0 HP
10.0: 6.1 to 10.0 HP
N: R410A refrigerant
1: Generation
XX – XX N 1
1.3.2 Product guide: Outdoor units
¿ RAS outdoor units
RAS FSXN outdoor units
RAS FSXN
3~
Unit Code Unit Code
RAS-8FSXN 60288346 RAS-14FSXN 60288349
RAS-10FSXN 60288347 RAS-16FSXN 60288350
RAS-12FSXN 60288348 RAS-18FSXN 60288351
N O T E
To obtain the different working range powers, please refer to chapter Combination of outdoor units, see on page
5.
1 General information
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SMGB0065 rev. 1 - 12/2010

¿ Combination of outdoor units
The power range of the RAS-(8-54)FSXN outdoor units is obtained by applying one unit (RAS-(8-18)FSXN) or by the
combination of two or three outdoor units (RAS-(20-54)FSXN), depending on the instructions in the following tables.
Base units
HP 8 10 12 14 16 18
Model RAS-8FSXN RAS-10FSXN RAS-12FSXN RAS-14FSXN RAS-16FSXN RAS-18FSXN
Combination of base units
HP 20 22 24 26 28 30
Model RAS-20FSXN RAS-22FSXN RAS-24FSXN RAS-26FSXN RAS-28FSXN RAS-30FSXN
Combination
RAS-8FSXN RAS-8FSXN RAS-10FSXN RAS-12FSXN RAS-14FSXN RAS-14FSXN
RAS-12FSXN RAS-14FSXN RAS-14FSXN RAS-14FSXN RAS-14FSXN RAS-16FSXN
HP 32 34 36 38 40 42
Model RAS-32FSXN RAS-34FSXN RAS-36FSXN RAS-38FSXN RAS-40FSXN RAS-42FSXN
Combination
RAS-16FSXN RAS-16FSXN RAS-18FSXN RAS-12FSXN RAS-12FSXN RAS-12FSXN
RAS-16FSXN RAS-18FSXN RAS-18FSXN RAS-12FSXN RAS-12FSXN RAS-12FSXN
– – – RAS-14FSXN RAS-16FSXN RAS-18FSXN
HP 44 46 48 50 52 54
Model RAS-44FSXN RAS-46FSXN RAS-48FSXN RAS-50FSXN RAS-52FSXN RAS-54FSXN
Combination
RAS-12FSXN RAS-12FSXN RAS-12FSXN RAS-14FSXN RAS-16FSXN RAS-18FSXN
RAS-14FSXN RAS-16FSXN RAS-18FSXN RAS-18FSXN RAS-18FSXN RAS-18FSXN
RAS-18FSXN RAS-18FSXN RAS-18FSXN RAS-18FSXN RAS-18FSXN RAS-18FSXN
1 General information
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1

1.3.3 Accessory code list
HITACHI offers a range of different accessories and remote control systems that can be used with the SET FREE outdoor
units. Please consult the corresponding Technical Catalogue for controls.
Name Description Code Figure
MC-20AN Branch pipe
(pipe connection kit) 70526009
MC-21AN Branch pipe
(pipe connection kit) 70526010
MC-30AN Branch pipe
(pipe connection kit) 70526011
MC-20XN Branch pipe
(pipe connection kit) 70526109
MC-21XN Branch pipe
(pipe connection kit) 70526110
MC-30XN Branch pipe
(pipe connection kit) 70526111
CH-6.0N1 CH Unit 60291633
CH-10.0N1 CH Unit 60291634
DBS-TP10A Drain Boss 60291683
E-102SN2 Branch pipe
(multikit) 70524001
E-162SN2 Branch pipe
(multikit) 70524002
E-242SN2 Branch pipe
(multikit) 70524004
E-302SN2 Branch pipe
(multikit) 70524005
E-52XN2 Branch pipe
(multikit) 70525000
E-102XN2 Branch pipe
(multikit) 70525001
E-162XN2 Branch pipe
(multikit) 70525002
E-202XN2 Branch pipe
(multikit) 70525003
E-242XN2 Branch pipe
(multikit) 70525004
E-322XN2 Branch pipe
(multikit) 70525005
MH-84AN Header branch 70522007
MH-108AN Header branch 70522008
1 General information
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2. Unit installation
Index
2.1 Outdoor unit................................................................................................................................ 8
2.1.1 Preliminary conditions for positioning of outdoor unit.................................................................... 8
2.1.2 Transport, lifting and handling of the units.................................................................................... 8
2.1.3 Installation space RAS-(8-18)FSXN.............................................................................................. 10
2.1.4 Center of gravity............................................................................................................................ 11
2.1.5 Installation..................................................................................................................................... 11
2.1.6 Foundation and anchorage of outdoor unit................................................................................... 20
2.2 CH units...................................................................................................................................... 22
2.2.1 Transportation and handling CH units........................................................................................... 22
2.2.2 CH unit installation........................................................................................................................ 22
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2

2.1 Outdoor unit
2.1.1 Preliminary conditions for positioning of outdoor unit
Mount the outdoor unit in a shady location or where it will not be exposed to direct sunlight, or to high temperatures. It should
also be a well-ventilated spot.
Mount the outdoor unit so that noises and the discharge of air from the unit will not bother neighbours or the surrounding
environment.
Install the outdoor unit in an area of limited access to the general public.
In cold climates, ice may form on the unit. When installing the unit, make sure that ice falling off the unit could not pose a
risk to passers-by.
When installing the outdoor unit in areas covered by snow, mount the covers supplied by the fitter on the top of the unit and
on the heat exchanger inlet side.
Do not install the outdoor unit in zones where dust or contamination could block the outside heat exchanger.
Do not install the outdoor unit in areas with a high air content of oil, saline atmospheres or aggressive gases such as sulphur.
Do not install the outdoor unit close to sources of strong electromagnetic radiation or in areas where electromagnetic waves
radiate directly towards the electrical box and the components of the unit. Install the unit as far as possible from these
sources (minimum 3 metres); electronic noise may result in the incorrect operation of the unit.
CAUTION
In areas with high electromagnetic turbulence, a fuse may blow or the unit stop or an alarm may be triggered. In
this case, stop the system and restart it to remove the alarm.
Make sure that the base of the foundations is flat and strong enough to bear the weight of the unit.
Install the outdoor unit in an area with enough space around the unit to permit service and maintenance tasks.
CAUTION
•The aluminium fins have sharp edges. Take special care to avoid injury.
• The outdoor unit must be installed on rooftops or in areas not accessible by the user. Only service technicians
and maintenance personnel are permitted access to the unit.
2.1.2 Transport, lifting and handling of the units
¿ Transport of outdoor unit
When transporting the unit, make sure that it is securely and
correctly fastened to the vehicle to avoid damage. To avoid
damage, use appropriate textile slings -A- and cardboard
protection -B- to ensure that the unit is immobilised without
damaging it.
Use a suitable crane with the required loading capacity on flat
ground when loading and unloading the unit.
CAUTION
Do not place other material on top of the outdoor units during
transport and storage.
If the unit is not installed immediately, it should be stored in a suitable location, protected from the elements, especially in
saline atmospheres and from rodents. The unit must be stored with all the transport protection with which it was supplied
and with the wooden base -C- fitted.
A
B
C
2 Unit installation
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¿ Handling
When handling loads with fork-lift trucks, special care should be
taken to prevent injury to individuals in the vicinity or damage to the
unit itself.
CAUTION
National and local legislation must be observed with respect
to driving and the handling of loads with fork-lift trucks.
The only places in which the forks of the fork-lift truck can be
inserted are through the openings -A- of the unit base.
Do not apply excessive force to these openings, with either the
forks or other tools. This could damage the base of the unit.
Do not move the unit by pushing it on side -B- of the base with the forks of the fork-lift truck or by applying force on zone
-C-.
Do not use wheelbarrows to move the unit.
¿ Lifting method
Do not remove any of the protective packaging from the unit to
protect it during handling and lifting.
The unit should only be lifted from the base.
Fit the hoisting slings -A- through the openings -B- on the base of
the unit.
DANGER
•Always use textile slings in good condition, without cuts
or wear, and with the correct capacity for lifting the
outdoor unit.
•Do not fit the slings on the wooden base -C- of the unit. The
wooden base is only designed to protect the base of the unit during transportation; it will not withstand the
strain of lifting the unit.
•Do not use metal cables to lift the unit. Metal cables may slip on the wooden base supporting the unit and could
cause the unit to tilt or fall during the lifting operation.
Slightly tighten the two hoisting slings.
Insert protection -E- between where the slings touch the upper
protective cardboard packaging of the the unit. The slings must not
touch the unit.
The slings should form an angle of more than 60° -D- with the upper
part of the unit. The unit should be kept horizontal throughout the
lifting operation. If necessary, tie guide ropes on to prevent the unit
from swinging freely during the lifting process.
Do not apply force to zone -F-.
DANGER
No-one should remain in the radius of action of the crane during the lifting process.
A
A
C
B
A
B
C
A
C
D
E
F
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2.1.3 Installation space RAS-(8-18)FSXN
> 1500
> 500 + h2/2 > 300 + h1/2
1500 h2
h1
500
A B
C
765
D
N O T E
Side view. All measurements are in mm.
Calculate the service space required during the installation of the unit, based on the following:
• If there are no walls in front of or behind the unit, a space of 500 mm is necessary in front -A- and 300 mm behind -B-.
• If the front wall is higher than 1500 mm, a space of (500 + h2/2) mm is required at the front -A-.
• If the rear wall is higher than 500 mm, a space of (300 + h1/2) mm is required at the back -B-.
• If a wall -D- is installed in front of the unit, a ventilation hole -C- should be made in the wall.
• When the space over the unit is less than 1500 mm, or the space around the unit is closed, a duct is required to prevent
short-circuits between the inlet air and the discharge air.
• If there are any obstacles in the space over the unit, the four sides of the unit should be left open.
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2.1.4 Center of gravity
Model Net weight (kg)
Center of gravity (mm) Outer dimensions (mm)
X Y Z A B C
RAS-8FSXN
210 470 310 630 950 765 1720RAS-10FSXN
RAS-12FSXN
RAS-14FSXN
295 540 295 575
1210 765 1720RAS-16FSXN
RAS-18FSXN 315 540 305 590
2.1.5 Installation
¿ Installation with walls in two directions
If the units installed are adjacent to high buildings, without walls in two directions, a space of 300 mm is required at the rear
side of the unit.
> 300
> 10
> 400 > 500 + h2/2
> 300
> 200
> 300
> 400
W
W W
W W
N O T E
•All measurements are in mm.
•Top view. The arrow ▼ indicates the front of the unit.
•W: No limit for side wall height.
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¿ Installation with walls in three directions
Single Installation Installation in the same direction
> 500 + h2/2
> 10
> 300 + h1/2
W
> 300 + h1/2
> 10
> 500
> 20 > 20 > 500 + h2/2
W
Rear to rear installation 1 Rear to rear installation 2
> 500 + h2/2
> 900
> 500 + h2/2
> 20 > 20
> 10
W
> 200
> 500 + h2/2
> 500
>400 >400
> 500 + h2/2
W
N O T E
•All measurements are in mm.
•Top view. The arrow ▼ indicates the front of the unit.
•W: No limit for side wall height.
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SMGB0065 rev. 1 - 12/2010

¿ Installation with walls in four directions
Single installation Installation in the same direction
> 200
> 300 + h1/2
> 200
> 800 > 500 + h2/2
W
W
> 200 > 200
> 300 + h1/2
> 900
> 800 > 800
> 500 + h2/2
> 200 > 200
W
W
Rear to rear installation 1 Rear to rear installation 2
> 500 + h2/2
> 200 > 200
> 1600
> 800 > 800
> 200 > 200
> 500 + h2/2
W
W
> 200 > 200
> 500 + h2/2
> 900
> 800 > 800
> 500 + h2/2
> 400 > 400
WW
N O T E
•All measurements are in mm.
•Top view. The arrow ▼ indicates the front of the unit.
•W: No limit for side wall height.
¿ Considerations
N O T E
•All measurements are in mm.
•The dimensions considered in the following figures include the space necessary for typical installation and
maintenance work for operation in refrigeration mode at an outdoor temperature of 35 °C.
If the outdoor temperature is higher and if there is the possibility of short circuit between the inlet and outlet
air, locate the most suitable dimensions by calculating the air flow current in comparison with the dimensions
given.
•For installation in several groups, a maximum of six units (A) one metre apart can be grouped.
•
A>1000
•If the unit is surrounded by walls on all four sides, keep one of the walls partially open.
•Keep the upper side open to prevent mutual interference of inlet and outlet air for each outdoor unit.
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