Hitachi RWM-(H)FSN3E User manual

Printed in SpainTCGB0070 rev.3 - 04/2012
HITACHI participates in the Eurovent Certification Programme; the
certified data of certified models are listed in the Eurovent Certification
Online Directory (www.eurovent-certification.com).
Hitachi air conditioning products are manufactured according to:
ISO 9001 of JQA, Japan for its Quality Management accordance with
the standard
ISO 14001 of JACO, Japan for its Environmental Management
accordance with the standard.
Hitachi Air Conditioning Products Europe, S.A. is certified with:
ISO 9001 of AENOR, Spain for its Quality Management accordance
with the standard
ISO 14001 of AENOR Spain for its Environmental Management
systems accordance with the standard.
Hitachi certifies that our products have met EU consumer safety,
health and environmental requirements.
Hitachi Air Conditioning Products Europe, S.A.
Ronda Shimizu, 1 - Políg. Ind. Can Torrella
08233 Vacarisses (Barcelona) España
Hitachi fulfills with the Certification NF-PAC that recognize the quality
requirements for these heat pumps systems.
RWM-(H)FSN3E Indoor units
RAS-H(V)RNME-AF Outdoor units
RAS-HVRN2 Outdoor unit
Technical Catalogue
YUTAKI S SERIES
TCGB0070 rev 3 - 04/2012
YUTAKI S SERIES
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HEAT PUMP

Contents
TCGB0070 rev.3 - 04/2012
Contents
General information
Features and benets
General data
Capacities and Selection data
Acoustic characteristic curves
Working range
General dimensions
Refrigerant cycle
Piping work and refrigerant charge
Electrical wiring
Installation congurations
Optional functions
Troubleshooting
1
2
3
4
5
6
7
8
9
10
11
12
13

General Index
TCGB0070 rev.3 - 04/2012
V
General Index
1. General information ..................................................................................................... 11
1.1 General information ..................................................................................................................................12
1.1.1 General notes................................................................................................................................................ 12
1.1.2 Introduction.................................................................................................................................................... 12
1.1.3 Environment-friendly units............................................................................................................................. 13
1.2 Applied symbols........................................................................................................................................14
1.3 Product guide............................................................................................................................................15
1.3.1 Classication of indoor unit models............................................................................................................... 15
1.3.2 Classication of outdoor unit models............................................................................................................. 15
1.3.3 Classication of Domestic Hot Water Tank accessory .................................................................................. 15
1.3.4 Product guide: indoor unit ............................................................................................................................. 16
1.3.5 Product guide: outdoor unit ........................................................................................................................... 17
1.3.6 Accessory code list........................................................................................................................................ 17
2. Features and benefits .................................................................................................. 21
2.1 Selection benets .....................................................................................................................................22
2.1.1 Environment-friendly system ......................................................................................................................... 22
2.1.2 Expanded selection range............................................................................................................................. 23
2.1.3 Adaptability to the customer’s/system needs ................................................................................................ 24
2.2 Installation benets...................................................................................................................................25
2.2.1 Easy unit installation...................................................................................................................................... 25
2.2.2 Easy and exible electrical installation .......................................................................................................... 28
2.3 Start-up benets .......................................................................................................................................29
2.3.1 Start-up by pressing the Run/Stop button of LCD user’s interface ............................................................... 29
2.3.2 Floor screed drying (Circuits 1 & 2) (Optional function) ................................................................................ 29
2.3.3 Test run operation from LCD user’s interface................................................................................................ 29
2.4 Functionality benets................................................................................................................................30
2.4.1 High efciency system................................................................................................................................... 30
2.4.2 Wide capacity range...................................................................................................................................... 30
2.4.3 Expanded working range............................................................................................................................... 31
2.4.4 Advanced technology .................................................................................................................................... 32
2.5 Control features ........................................................................................................................................44
2.5.1 Flexible space heating/cooling conguration and control.............................................................................. 44
2.5.2 Flexible Domestic Hot Water (DHW) control ................................................................................................. 48
2.5.3 Swimming pool combination control ............................................................................................................. 50
2.5.4 Flexible water pumps control......................................................................................................................... 50
2.5.5 Other optional functions ................................................................................................................................ 50

General Index
TCGB0070 rev.3 - 04/2012
VI
2.6 Maintenance benets................................................................................................................................51
2.6.1 Complete operation display by LCD user’s interface .................................................................................... 51
2.6.2 Front access to the electrical box.................................................................................................................. 51
2.6.3 Electrical box turns on itself........................................................................................................................... 52
2.6.4 Shutdown valves ........................................................................................................................................... 52
2.6.5 Alarm hystorical data ..................................................................................................................................... 53
3. General data.................................................................................................................. 55
3.1 YUTAKI S system .....................................................................................................................................56
3.2 Indoor unit.................................................................................................................................................57
3.3 Outdoor unit..............................................................................................................................................59
3.3.1 RAS-(2-6)(HVRN2/HVRNME-AF) ................................................................................................................. 59
3.3.2 RAS-(4-10)HRNME-AF ................................................................................................................................. 60
3.4 Domestic Hot Water Tank .........................................................................................................................61
3.5 Component data .......................................................................................................................................62
3.5.1 Indoor unit ..................................................................................................................................................... 62
3.5.2 Outdoor unit................................................................................................................................................... 63
3.6 Electrical data ...........................................................................................................................................65
3.6.1 Considerations .............................................................................................................................................. 65
3.6.2 Indoor unit ..................................................................................................................................................... 65
3.6.3 Outdoor unit................................................................................................................................................... 65
3.6.4 Domestic Hot Water Tank.............................................................................................................................. 66
4. Capacity and selection data ........................................................................................ 67
4.1 System selection procedure .....................................................................................................................68
4.1.1 Selection parameters .................................................................................................................................... 68
4.1.2 Selection procedure ...................................................................................................................................... 68
4.2 Maximum capacity tables .........................................................................................................................77
4.2.1 Maximum heating capacity (kW) ................................................................................................................... 77
4.2.2 Maximum cooling capacity (kW) ................................................................................................................... 79
4.3 Heating nominal points of interest ............................................................................................................80
4.4 Correction factors .....................................................................................................................................81
4.4.1 Defrost correction factor ............................................................................................................................... 81
4.4.2 Piping length correction factor....................................................................................................................... 81

General Index
TCGB0070 rev.3 - 04/2012
VII
5. Acoustic characteristic curves ................................................................................... 85
5.1 Overall sound level ...................................................................................................................................86
5.1.1 Outdoor unit................................................................................................................................................... 87
5.1.2 Indoor unit ..................................................................................................................................................... 89
6. Working range .............................................................................................................. 91
6.1 Temperature range ................................................................................................................................... 92
6.1.1 Heating mode ................................................................................................................................................ 92
6.1.2 Cooling mode ................................................................................................................................................ 93
7. General dimensions ..................................................................................................... 95
7.1 Dimensions...............................................................................................................................................96
7.1.1 Indoor unit ..................................................................................................................................................... 96
7.1.2 Outdoor unit................................................................................................................................................... 98
7.1.3 Domestic Hot Water Tank............................................................................................................................ 102
7.2 Service space .........................................................................................................................................104
7.2.1 Indoor unit ................................................................................................................................................... 104
7.2.2 Outdoor unit................................................................................................................................................. 104
8. Refrigerant cycle ........................................................................................................ 105
8.1 RAS-2HVRN2 + RWM-2.0(H)FSN3E combination.................................................................................106
8.2 RAS-3HVRNME-AF + RWM-3.0(H)FSN3E combination .......................................................................107
8.3 RAS-(4-6)H(V)RNME-AF + RWM-(4.0-6.0)(H)FSN3E combination....................................................... 108
8.4 RAS-(8/10)HRNME-AF + RWM-(8.0/10.0)(H)FSN3E combination ........................................................ 109
9. Piping work and refrigerant charge.......................................................................... 111
9.1 Refrigerant piping ................................................................................................................................... 112
9.1.1 Refrigerant piping length ..............................................................................................................................112
9.1.2 Refrigerant piping size..................................................................................................................................112
9.2 Copper pipes, measurements and connection ....................................................................................... 113
9.2.1 Copper pipes and measurements ................................................................................................................113
9.2.2 Pipe connection............................................................................................................................................114
9.3 Refrigerant charge amount..................................................................................................................... 114
9.4 Precautions in the event of gas refrigerant leaks.................................................................................... 115
9.4.1 Maximum permitted concentration of HFCs .................................................................................................115
9.4.2 Calculation of refrigerant concentration........................................................................................................115
9.4.3 Countermeasure in the event of refrigerant leakage ....................................................................................116

General Index
TCGB0070 rev.3 - 04/2012
VIII
9.5 Refrigerant pipe work.............................................................................................................................. 117
9.5.1 General notes before performing pipe work .................................................................................................117
9.5.2 Suspension of refrigerant and water pipes...................................................................................................117
9.5.3 Pipe work and connection ............................................................................................................................118
9.5.4 Brazing work considerations ....................................................................................................................... 120
9.5.5 Refrigerant piping work considerations ....................................................................................................... 120
9.6 Water pipe work and connection ............................................................................................................120
9.6.1 General notes.............................................................................................................................................. 120
9.6.2 Water piping connection.............................................................................................................................. 121
9.6.3 Draining pipe work....................................................................................................................................... 122
9.6.4 Circuit water lling-in ................................................................................................................................... 122
9.6.5 Water ow adjustment................................................................................................................................. 122
9.7 Pressure charts.......................................................................................................................................124
9.8 DHWT - Domestic Hot Water tank .......................................................................................................... 126
9.8.1 Hydraulic circuit ........................................................................................................................................... 126
9.8.2 Pressure drop.............................................................................................................................................. 127
9.8.3 General standard for hydraulic installation .................................................................................................. 127
10. Electrical wiring........................................................................................................ 129
10.1 Power supply ........................................................................................................................................130
10.1.1 General check ........................................................................................................................................... 130
10.1.2 Electrical connection of outdoor unit ......................................................................................................... 131
10.1.3 Electrical connection of outdoor unit ......................................................................................................... 133
10.2 Setting of DIP switches and RSW switches..........................................................................................135
10.2.1 Outdoor unit............................................................................................................................................... 135
10.2.2 Indoor unit ................................................................................................................................................. 138
10.3 Common wiring.....................................................................................................................................143
10.3.1 Electrical wiring between outdoor and indoor unit..................................................................................... 143
10.3.2 Wire sizes.................................................................................................................................................. 144
10.4 Domestic Hot Water Tank .....................................................................................................................145
10.4.1 Electrical wiring connection ....................................................................................................................... 145
10.4.2 Wire size.................................................................................................................................................... 145
11. Installation configuration......................................................................................... 147
11.1 Heating system congurations.............................................................................................................. 148
11.1.1 System conguration ................................................................................................................................. 148
11.1.2 Typical installation samples ....................................................................................................................... 149
11.2 Cooling system congurations ..............................................................................................................154

General Index
TCGB0070 rev.3 - 04/2012
IX
11.3 Additional combinations ........................................................................................................................157
11.3.1 Swimming pool .......................................................................................................................................... 157
11.3.2 Solar panel ................................................................................................................................................ 157
12. Optional functions.................................................................................................... 159
12.1 Optional functions of the indoor unit .....................................................................................................160
13. Troubleshooting ....................................................................................................... 161
13.1 On screen during abnormal operation .................................................................................................. 162
13.2 Alarm codes.......................................................................................................................................... 162

1 General information
TCGB0070 rev.3 - 04/2012
11
1
1. General information
Index
1.1. General information...............................................................................................................................12
1.1.1. General notes ............................................................................................................................................ 12
1.1.2. Introduction................................................................................................................................................ 12
1.1.3. Environtment-friendly units ........................................................................................................................ 13
1.2. Applied symbols ....................................................................................................................................14
1.3. Product guide ........................................................................................................................................15
1.3.1. Classication of indoor unit models ........................................................................................................... 15
1.3.2. Classication of outdoor unit models......................................................................................................... 15
1.3.3. Classication of Domestic Hot Water Tank accessory............................................................................... 16
1.3.4. Product guide: indoor unit.......................................................................................................................... 16
1.3.5. Product guide: outdoor unit ....................................................................................................................... 17
1.3.6. Accessory code list.................................................................................................................................... 17

1 General information
TCGB0070 rev.3 - 04/2012
12
1.1 General information
1.1.1 General notes
No part of this publication may be reproduced, copied, led 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 notication and without being compelled to introducing them into products
subsequently 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 specic models. No claims will be
accepted based on the data, illustrations and descriptions included in this manual.
No type of modication must be made to the equipment without prior, written authorization from the manufacturer.
1.1.2 Introduction
Yutaki S indoor unit has two different ranges:
-Heating and cooling version (RWM-(2.0-10.0)FSN3E)
-Heating only version (RWM-(2.0-10.0)HFSN3E).
All the information in this manual, related to cooling operation, only applies to heating and cooling version (RWM-(2.0-10.0)
FSN3E).
The HITACHI’s YUTAKI S system is a heating and cooling solution for the home with high energy efciency. The system
consists of an outdoor unit (Inverter heat pump) and an indoor unit hydraulic module. The heat pump absorbs/sends heat
from/to the outside, and transfers it to the water circuit through the indoor unit hydraulic module.
YUTAKI S can be used both in winter time and in summer time, integrating heating and cooling systems, creating an air-
conditioned system and using just one energy source, the electricity.
For winter time
With the aim of reducing energy expenditure, there is a clear trend in the market to use medium and low temperature hea-
ting systems. Technological advances and improvements in insulation in the home enable to use of low temperature water
to heat homes. This results in more comfort and greater energy efciency.
YUTAKI S meets the necessary conditions to provide this type of application, fullling user’s needs.
The heat pump extracts the heat present in the air, increases its refrigerant temperature and transmits it to the water circuit
by means of indoor unit plate heat exchanger, where the heat is taken to radiators/(fan-coils), underoor heating compo-
nents or both (2nd. temperature area).
As well as increased efciency and reduced CO2emissions due to the extraction of free heat from the outside air, the sys-
tem also boasts proven reliability and minimum maintenance. YUTAKI S provides a comfortable atmosphere all year long,
even in the coldest climates by means of the following system conguration possibilities:
• Mono-valent system: This is the most popular conguration. The air to water heat pump is sized to provide 80% of the
heating requirements on the coldest day of the year. An auxiliary electric heater (inside the unit) is used to provide the
additional heating required on cold days. This option usually results in an ideal balance between installation costs and
future energy consumption, as proven by its popularity in colder climates than ours, such as Sweden and Norway.
• Mono-energy system: The air to water heat pump is sized to provide 100% of the heating requirements on the coldest
day the year.
• Alternating Bi-valent system: For installations with an existing heating system by boiler and when is needed to heat
the supplied water temperature to the circuit up to high temperatures (80ºC), the boiler can be congured to alternate
with the air to water heat pump.

1 General information
TCGB0070 rev.3 - 04/2012
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1
For summer time
YUTAKI S system can be also used as cooling system for combination with fan-coils, refreshing oor or both (2nd. tem-
perature area).
For fan-coils: It is possible to cool the water up to 5ºC .
For refreshing oor: It is possible to cool the water up to temperatures between 16 and 22ºC.
Domestic Hot Water (DHW) production
YUTAKI S also gives the option of sanitary hot water production, allowing the user to benet from the heat pump’s high
efciency and achieve hot water up to 70ºC. This is made possible by a Domestic Hot Water Tank accessory supplied by
HITACHI, which is heated in the heat pump at temperatures below 60ºC, using water pre-heated. An electric heater inte-
grated at the top of the stainless steel tank, increases the temperature in accordance with the user’s needs.
Additional combinations
YUTAKI S system can be used for the following additional combinations:
Solar combination for DHW
YUTAKI S system can be combined with solar panel.
The solar combination will enable to heat up the DHW by means of the sun. The solar combination is designed to transfer
the heat from the solar panels (sun radiation) to the heat exchanger of DHW tank.
Swimming pool operation
For summer session period, YUTAKI S can be used to heat up the swimming pool water temperature up to a value between
24 and 33ºC.
1.1.3 Environment-friendly units
The new HITACHI’s YUTAKI S series uses environmentally-friendly R410A gas refrigerant, and the RoHS and Green Dot
regulations are applied throughout the manufacturing and installation process to reect HITACHI’s awareness of environ-
mental respect and commitment.
R410A is totally environmentally-friendly since it does not contain any substances that damage the ozone layer:
ODP (ozone depleting product) =0.
HITACHI’s YUTAKI S series are very efcient and allow signicant energy savings compared with conventional systems.
This energy efciency means less production of CO2, which causes the greenhouse effect.

1 General information
TCGB0070 rev.3 - 04/2012
14
1.2 Applied symbols
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 damage to the unit, the installation or 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phy-
sical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 nd information on safe procedures during unit installation.
CAUTION
• Thetextfollowingthissymbolcontainsinformationandinstructionsrelatingdirectlytoyoursafetyandphy-
sical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 nd information on safe procedures during unit installation.
NOTE
• 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
TCGB0070 rev.3 - 04/2012
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1
1.3 Product guide
1.3.1 Classication of indoor unit models
Unit type (indoor unit water module)
Position-separating hyphen (xed)
Compressor power (HP): 2.0, 3.0, 4.0, 5.0, 6.0, 8.0, 10.0.
H: Only heating unit
System Free
R410A refrigerant
Series
E: Made in Europe
RWM - X.X X FS N 3 E
1.3.2 Classication of outdoor unit models
RAS-HVRN2
Unit type (outdoor unit)
Position-separating hyphen (xed)
Compressor power (HP): 2.
Heat pump
V: Single phase unit (1~ 230V 50Hz)
-: Three phase unit (3N~ 400V 50Hz)
Inverter system
R410A refrigerant
Series
-: Made in Japan
RAS - X H X R N 2 X
RAS-H(V)RNME-AF
Unit type (outdoor unit)
Position-separating hyphen (xed)
Compressor power (HP): 3, 4, 5, 6, 8, 10.
Heat pump
V: Single phase unit (1~ 230V 50Hz)
-: Three phase unit (3N~ 400V 50Hz)
Inverter system
R410A refrigerant
IVX series
E: Made in Europe
YUTAKI S
RAS - X H X R N M E -AF
1.3.3 Classication of Domestic Hot Water Tank accessory
Unit type: Domestic Hot Water Tank
Capacity (L) 200-300 Litres
Tank type: E=Enamelled
S=Stainless
Position-separating hyphen (xed)
2.5 kW Electrical Heater
Series
E = Made in Europe
DHWT XXX X - H 1 E

1 General information
TCGB0070 rev.3 - 04/2012
16
1.3.4 Product guide: indoor unit
RWM-FSN3E indoor units
1~ 3N~
Unit Code Unit Code
RWM-2.0FSN3E 7E474003 - -
RWM-3.0FSN3E 7E474005 - -
RWM-4.0FSN3E 7E474107 RWM-4.0FSN3E 7E474107
RWM-5.0FSN3E 7E474108 RWM-5.0FSN3E 7E474108
RWM-6.0FSN3E 7E474109 RWM-6.0FSN3E 7E474109
- - RWM-8.0FSN3E 7E474110
- - RWM-10.0FSN3E 7E474111
RWM-HFSN3E indoor units
1~ 3N~
Unit Code Unit Code
RWM-2.0HFSN3E 7E474016 - -
RWM-3.0HFSN3E 7E474018 - -
RWM-4.0HFSN3E 7E474120 RWM-4.0HFSN3E 7E474120
RWM-5.0HFSN3E 7E474121 RWM-5.0HFSN3E 7E474121
RWM-6.0HFSN3E 7E474122 RWM-6.0HFSN3E 7E474122
- - RWM-8.0HFSN3E 7E474123
- - RWM-10.0HFSN3E 7E474124

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1
1.3.5 Product guide: outdoor unit
RAS-H(V)RNME-AF outdoor units
RAS-HVRNME-AF units
1~
RAS-HRNME-AF units
3N~
Unit Code Unit Code
RAS-2HVRN2 60288093 - -
RAS-3HVRNME-AF 7E300018 - -
RAS-4HVRNME-AF 7E300020 RAS-4HRNME-AF 7E300120
RAS-5HVRNME-AF 7E300021 RAS-5HRNME-AF 7E300121
RAS-6HVRNME-AF 7E300022 RAS-6HRNME-AF 7E300122
- - RAS-8HRNME-AF 7E317110
- - RAS-10HRNME-AF 7E317111
1.3.6 Accessory code list
Room Thermostats
Accessory Name Code Figure
ATW-RTU-01 ON/OFF Thermostat
(Receiver + Room Thermostat) 7E543000
ATW-RTU-02 “Intelligent” Thermostat
(Receiver + Room Thermostat) 7E549900
ATW-RTU-03
2nd temperature Thermostat
(Only Room Thermostat)
*Only for “Intelligent” Thermostat application
7E549901

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Other accessories
Accessory Name Code Figure
ATW-HSK-01
(BDHM1)
Hydraulic separator
7E549905
(BDHM1)
ATW-3WV-01
(VID3V1)
3-way valve
7E549906
(VID3V1)
ATW-AQT-01
(ASMSH1)
Aquastat
7E549907
(ASMSH1)
ATW-2KT-01
(CDH2Z1)
2nd. temperature kit
7E549904
(CDH2Z1)
ATW-MVM-01
NEW
Mixing valve motor 7E549912
ATW-DPK-01
Drain pan kit
(For RWM-(2.0-6.0)FSN3E)
7E549902
ATW-DPK-02
NEW
Drain pan kit
(For RWM-(8.0/10.0)FSN3E)
7E549903
ATW-AOS-01
Auxilliary output signal box
(Relay board for additional output signals)
7E549910
ATW-2OS-01
Ambient temperature sensor
(2nd. outdoor temperature sensor)
7E549909
ATW-WTS-02
Water temperature sensor
(2nd. temperature control, boiler combination)
7E549911
ATW-SPS-01 Swimming pool sensor 7E549908
ATW-WTS-02Y
Water temperature sensor
(for Domestic Hot Water Tank)
9E500004

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1
Accessory Name Code Figure
DHWT200E-2.5H1E Domestic Hot Water Tank Enamelled (200 L.) 70544000
DHWT300E-2.5H1E Domestic Hot Water Tank Enamelled (300 L.) 70544001
DHWT200S-2.5H1E Domestic Hot Water Tank Stainless (200 L.) 70544100
DHWT300S-2.5H1E Domestic Hot Water Tank Stainless (300 L.) 70544101
DHWT-CP-01 Permanent cathode protection for enamelled tank
(200 L.) 70544900
DHWT-CP-03 Permanent cathode protection for enamelled tank
(300 L.) 70544903
DHWT-CP-02 Permanent cathode protection for stainless tank
(200 L.) 70544901
DHWT-CP-04 Permanent cathode protection for stainless tank
(300 L.) 70544904
DHWT-SWG-01 Security valve 70544902