Hitachi RWM-(H)FSN3E Technical Catalogue
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Hitachi RWM-(H)FSN3E Technical Catalogue

Yutaki s series
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See also: Service Manual
YUTAKI S SERIES
Technical Catalogue
RWM-(H)FSN3E Indoor units
RAS-H(V)RNME-AF Outdoor units
RAS-HVRN2 Outdoor unit

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Summary of Contents for Hitachi RWM-(H)FSN3E

  • Page 1 YUTAKI S SERIES Technical Catalogue RWM-(H)FSN3E Indoor units RAS-H(V)RNME-AF Outdoor units RAS-HVRN2 Outdoor unit...
  • Page 3 Contents C o n t e n t s General information Features and benefits General data Capacities and Selection data Acoustic characteristic curves Working range General dimensions Refrigerant cycle Piping work and refrigerant charge Electrical wiring Installation configurations Optional functions Troubleshooting TCGB0070 rev.3 - 04/2012...

  • Page 5: Table Of Contents

    General Index 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  Classification of indoor unit models ....................... 15 1.3.2 ...
  • Page 6 General Index 2.6  Maintenance benefits..........................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.
  • Page 7 General Index 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.
  • Page 8 General Index 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 ...
  • Page 9 General Index 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 TCGB0070 rev.3 - 04/2012...

  • Page 11: General Information

    1 General information G e n e r a l i n f o r m a t i o n 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.

  • Page 12: General Information

    1 General information 1.1 General information 1.1.1 General notes 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 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.

  • Page 13: Environment-Friendly Units

     Domestic Hot Water (DHW) production YUTAKI S also gives the option of sanitary hot water production, allowing the user to benefit from the heat pump’s high  efficiency 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.

  • Page 14: Applied Symbols

    1 General information 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.

  • Page 15: Product Guide

    1 General information 1.3 Product guide 1.3.1 Classification of indoor unit models Unit type (indoor unit water module) Position-separating hyphen (fixed) 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 1.3.2 Classification of outdoor unit models ...

  • Page 16: Product Guide: Indoor Unit

    1 General information 1.3.4 Product guide: indoor unit RWM-FSN3E indoor units 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 Unit Code Unit Code RWM-2.0HFSN3E...

  • Page 17: Product Guide: Outdoor Unit

    1 General information 1.3.5 Product guide: outdoor unit RAS-H(V)RNME-AF outdoor units RAS-HVRNME-AF units RAS-HRNME-AF units 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 ...
  • Page 18 1 General information  Other accessories Accessory Name Code Figure ATW-HSK-01 7E549905 Hydraulic separator (BDHM1) (BDHM1) ATW-3WV-01 7E549906 3-way valve (VID3V1) (VID3V1) ATW-AQT-01 7E549907 Aquastat (ASMSH1) (ASMSH1) ATW-2KT-01 7E549904 2nd. temperature kit (CDH2Z1) (CDH2Z1) Mixing valve motor 7E549912 ATW-MVM-01 Drain pan kit ATW-DPK-01 7E549902 (For RWM-(2.0-6.0)FSN3E) Drain pan kit 7E549903...
  • Page 19 1 General information 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 Permanent cathode protection for enamelled tank  DHWT-CP-01 70544900 (200 L.) Permanent cathode protection  for enamelled tank  DHWT-CP-03 70544903 (300 L.) Permanent cathode protection for stainless tank  DHWT-CP-02 70544901 (200 L.) Permanent cathode protection for stainless tank  DHWT-CP-04 70544904 (300 L.) DHWT-SWG-01 Security valve 70544902 TCGB0070 rev.3 - 04/2012...

  • Page 21: Features And Benefits

    2  Features and benefits F e a t u r e s a n d b e n e f i t s Index 2.1. Selection benefits ..........................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.

  • Page 22: Selection Benefits

    2  Features and benefits 2.1 Selection benefits 2.1.1 Environment-friendly system  Free energy The air to water heat pump extracts the free energy present in the air, which is enough to heat a home up to a comfortable temperature, even on the coldest winter day. The air to water heat pump can attain efficiency of over 4. This means less electrical power input and therefore a reduction ...

  • Page 23: Expanded Selection Range

    RAS outdoor unit series allows (2-10)HP units for being selected in single or three phase combinations, depending on the model. Capacity (HP) UTOPIA outdoor units Phase  Indoor unit RWM-(H)FSN3E indoor unit series range allows single-phase and three-phase connection. All models are factory supplied with electric heater. Capacity (HP) RWM indoor Phase units 10.0 Electric heater 3 kW...

  • Page 24: Adaptability To The Customer's/System Needs

    2  Features and benefits 2.1.3 Adaptability to the customer’s/system needs As it have been seen in the Introduction, depending on the type of heating installation system (existing or new) and the user’s needs, the most suitable system for each situation can be chosen with: ...

  • Page 25: Installation Benefits

    2  Features and benefits 2.2 Installation benefits 2.2.1 Easy unit installation More straightforward installation due to the following aspects:  Compact size •  Reduced unit dimensions: The dimensions of new air to water heat pump have been reduced slightly in relation with previous models.
  • Page 26 2  Features and benefits  New wall support (Factory supplied) A new wall support has been designed to allow an easy installation work by following these steps: •  Step  : The wall support must be fixed on the wall using appropriate plugs and screws. •  Step : The unit should be placed on the wall hanging it on the wall support.  •  Step  : The unit installation should be finished fixing it at the bottom side using appropriate plugs and screws. To do  so, the unit is equipped with two holes at the bottom outer edges of back plate frame (there are two additional holes  on the upper outer edges of the back plate frame in cases where the wall support could not be installed). N O T E For more information, please refer to the Service Manual (SMXX0070).
  • Page 27  Incorporated electric heater (Factory supplied) All the new RWM-(H)FSN3E models have incorporated an electric heater for the most low ambient temperature conditions, without the need to install it in case that its use was necessary (Mono-energy system). If it is desired the performance of the air to water heat pump without the use of the electric heater, we only might to disable the electric heater and the air to water heat pump will provide the 100% of the required heating (Mono-valent system).

  • Page 28: Easy And Flexible Electrical Installation

     Drain pan for cooling installation (Accessory) For cooling mode it is necessary to collect the draining. Hitachi supplies a new easy to install drain pan accessory designed to integrate it into the unit’s cabinet for this purpose. 2.2.2 Easy and flexible electrical installation ...

  • Page 29: Start-Up Benefits

    2  Features and benefits 2.3 Start-up benefits 2.3.1 Start-up by pressing the Run/Stop button of LCD user’s interface The unit is factory set to work only by pressing the Run/Stop button of the LCD user’s interface.  The default value is set for one circuit (Direct) with OTC gradient for heating space of 0.6 (corresponding to a heating floor). 2.3.2 Floor screed drying (Circuits 1 & 2) (Optional function) The new air to water heat pump has a new special optional function used exclusively for the process of drying screed that has been newly applied to floor heating system. This process is based on EN-1264 par 4.

  • Page 30: Functionality Benefits

    2  Features and benefits 2.4 Functionality benefits 2.4.1 High efficiency system The combination of the scroll compressor and the inverter type continuous control, the high efficiency plate heat exchanger  and the water pumps classified as low power input allow the maximum energy efficiency, resulting in a high COP and EER performance.  NOTE: Conditions Range: - COP: Water in/out: 30/35 ºC; Out Temp. (DB/WB): 7/6 ºC - EER: Water in/out: 23/18 ºC; Out Temp. (DB): 35 ºC 2.4.2 Wide capacity range The new control frequency system allows a wide capacity application range as shown below: • ...

  • Page 31: Expanded Working Range

    2  Features and benefits •  Cooling capacity range at conditions: Water inlet/outlet: 23/18 ºC; Outdoor temperature: 35 (ºC DB) 2 kW 6 kW 10 kW 14 kW 18 kW 22 kW 26 kW 30 kW 34 kW RWM-2.0FSN3E 2 kW 6 kW 10 kW 14 kW 18 kW...

  • Page 32: Refrigerant Cycle

    2  Features and benefits 2.4.4 Advanced technology The functionality benefits explained before (Highly efficiency system, wide capacity range and expanded working range)  are direct consequence of the advanced technology applied on all the system components. Then, the main features on different components of the system will be detailed: Stop valve of Reversing the gas pipe valve High-efficiency plate - Super high-stream fan Water strainer...

  • Page 33: Outdoor Unit Heat Exchanger

    2  Features and benefits  Outdoor unit heat exchanger High-efficiency heat exchanger •  Compact design and high-efficiency by arranging narrow heat exchanger tubes in 3 rows. (befo- re Ø9.53mm, now Ø7mm). •  Newly-developed high-efficiency heat transfer fin. The ventilating resistance is reduced by 20% from previous mo- dels. •  Heat exchanger configuration aiming at fluid loss reduction. High-efficiency heat transfer fin Improved heat transfer capacity Air ventilation resistance Approx. 10% Increase Approx. 20% Newly-developed fin Reduction Current fin Current fin Heat trans-...
  • Page 34 2  Features and benefits  Fan unit Super high-stream fan The outdoor units have been designed with a new super high-stream fan of Ø544 mm, reducing the sound level and in- creasing its reliability, by the use of a three-blade design propeller. This fan is much more aerodynamic than earlier models.
  • Page 35 Decrease of leak loss Oil returning pipe Decrease of superheat loss All Rights Reserved, Copyright © 2007 Hitachi, Ltd. High pressure shell •  It acts as an oil separator reducing the amount of oil circulating in the cooling system giving better heat exchanger efficiency.

  • Page 36: Main Features

    2  Features and benefits Lubrication Bearing in mind that lubrication is one of the most important factors in the service life of a compressor, HITACHI has deve- 1. Comercial information loped a system based on the pressure differences between the suction and discharge using a secondary pump at the base of the compressor.
  • Page 37 2  Features and benefits DC compressor with neodymium magnet The use of a DC compressor with neodymium magnets in the rotor improves the performance at around the 30-40Hz range where the operation time of the inverter compressor is longest. Additionally, to suppress electromagnetic noise interference and achieve low noise, the rotor has been divided into two parts and the electric pole displaced.
  • Page 38 2  Features and benefits Optimized rotor shape Electromagnetic For compressor motor, before changing the rotor Frequency (Hz) Electromagnetic noise reduced For compressor motor, after changing the rotor Frequency (Hz) •  Acoustically insulated compressor: The scroll compressor is insulated by means of a acoustic cover, providing mini- mum noise levels.
  • Page 39 2  Features and benefits  Indoor unit heat exchanger Highly efficiency plate heat exchanger The use of a plate heat exchanger type allows getting high performance due to the following advantages: •  High heat transfer surface coefficient, leading to very high values of the heat transfer overall coefficient. •  High flow turbulence in the fluids, achieving turbulent regimes for low Reynolds numbers. This high turbulence allows  lower circulating speeds on the fluids. •  Lower heat losses, since only the edges of the plates are exposed to the outside environment and additionally to having small thicknesses, it can be readily isolated.

  • Page 40: Electric Heater

    2  Features and benefits Three different pump motor speeds In order to adapt the flow rate to the system requirements, there are available three pump motor speeds. Example of RWM-5.0FSN3E Viewed from A Pump speed selection Water flow N O T E V: Pump motor speed (V : Low, V : Medium, V : High)  Electric heater Complementary heating for the most low ambient temperature conditions For the most low ambient temperature conditions, the electric heater will be enabled in order to provide the necessary supplementary heating, doing possible the performance in a biggest working temperature range.
  • Page 41 2  Features and benefits  Domestic Hot Water Tank (DHWT accessory) The Domestic Hot Water Tank is an accessory supplied by HITACHI which allows the Domestic Hot Water production, with  the following characteristics: Enamelled and Stainless steel tank Two models of 200 and 300 litres capacity made in Vitrified steel and, two models more with same capacity made in Stain- less steel chemically descaled and passivated. Efficiency thermal insulation Thermally insulated with rigid, mould-injected, CFC free polyurethane PU foam and have an external, removable, padded  polypropylene film in white color and a top cover in grey color. High efficiency tank Optimum design of the heat exchanger coil to provide the maximum domestic hot water production capacity to the system.
  • Page 42 Easy to use LCD user’s interface (PC-AFTE) A new user-friendly interface control has been designed integrated on the air to water heat pump. The design of the new user interface has the following features: Few number of buttons The working mode is very simple, with only 7 buttons that make possible to access to all the display menus. HITACHI    ...
  • Page 43 2  Features and benefits N O T E For more information, please refer to Service Manual (SMXX0070). Complete display menu (Comprehensive view) Main screen is called “comprehensive view”. It provides the general system information distributed in 4 zones (Circuit I, Circuit II, Domestic Hot Water and swimming pool) through the screen, separating the different working concepts allowing  checking the status of each circuit.       Layout for swimming ...

  • Page 44: Control Features

    2  Features and benefits 2.5 Control features 2.5.1 Flexible space heating/cooling configuration and control N O T E • The air to water heat pump is pre-configured to work only in heating mode. In order to allow the cooling mode, it is necessary to perform a dip-switch setting and install the drain pan accessory. In the case, all the cooling mode uses for the unit will be permitted and the LCD user’s interface cooling configuration will appear. • For the detailed information, please refer to the Service Manual (SMXX0070).  Many available system configurations As mentioned before, the new air to water heat pump allows the control of a large variety of configurations. N O T E For the detailed information, please refer to the section Installation configurations.  Second water temperature control New air to water heat pump allows the water temperature control of two zones with different required temperatures (radia- tors + heating floor for example) by means of the 2nd Temperature Room Thermostat (as accessory).
  • Page 45 2  Features and benefits  Three different possible water temperature set-point configuration modes for each zone •  OTC Points: Water target is selected by an Outside Temperature Compensated (OTC) control that is defined by 4  different points (Minimum and maximum water outlet temperature vs Minimum and maximum outdoor ambient tempe- rature). Water outlet temperature Water temperature set-point (ºC) set point ºC (44) Tsh (20) Tshr Outdoor ambient...
  • Page 46 2  Features and benefits  Maximum/minimum water temperature setting for space protection by Installer mode •  Heating circuit minimum/maximum temperature limits selection by installer: The installer will limit the space heating temperature set-point in order to prevent excessively high or low temperatures. Water outlet temperature Water outlet temperature set-point (ºC)
  • Page 47 2  Features and benefits  Room thermostat units There are available two types of room thermostat units: •  ON/OFF room thermostat unit (accessory): When the room temperature setting is higher than the room actual tempe- rature, it is provided a thermo-ON signal to the system. Once reached the room temperature setting, it will be provi- ded a thermo-OFF signal to the system.

  • Page 48: Flexible Domestic Hot Water (Dhw) Control

    2  Features and benefits •  Boiler combination: When the unit is not able to provide the necessary heating capacity in low ambient temperature conditions, it will be stopped and the boiler starts to operate providing the necessary heating capacity. The unit should be sized in order to operate mainly with the air to water heat pump, and boiler will be only activated in low ambient temperature conditions.
  • Page 49 2  Features and benefits  Space heating priority mode The Domestic Hot Water (DHW) operation has priority over all other operation modes unless otherwise noted. It should be taken into account the following considerations: •  When DHW requires the heat pump operation, no other modes can require heat pump operation. • ...

  • Page 50: Swimming Pool Combination Control

    Available four external outputs signals for optional functions There are available four output optional signals that provide four optional functions of the system, programmed on the indoor unit PCB. N O T E In order to make easy the electrical connection works, HITACHI offers (as accessory) a relay board for the addi- tional output signals. For more information about the Optional functions, please refer to the Service Manual (SMXX0070). TCGB0070 rev.3 - 04/2012...

  • Page 51: Maintenance Benefits

    2  Features and benefits 2.6 Maintenance benefits 2.6.1 Complete operation display by LCD user’s interface The LCD user’s interface display menu allows to check all the important parameters and status of the unit in any moment. Most of these variables are the same ones that can be consulted by 7-segment, taking information from the outdoor unit. •  System operation: Cooling mode, Heating mode, DHW, SWP, ... •  Unit status: Display of more specific parameters (indoor/outdoor expansion valve opening, inverter operation frequen- cy, defrosting, ...). •  Actual temperature: A large serie of operation temperatures (water inlet/outlet temperature, room temperature of cir- cuits 1 and 2, outdoor ambient temperature, gas/liquid temperature, ...).

  • Page 52: Electrical Box Turns On Itself

    2  Features and benefits 2.6.3 Electrical box turns on itself The electrical box includes three hinges on the right side which allow the rotation of the electrical box in order to allow an easier access for the maintenance of the inner part of the unit. Hinges 2.6.4 Shutdown valves Additionally to the installation benefits (quick installation and pressure port for installation commissioning), the use of the ...

  • Page 53: Alarm Hystorical Data

    2  Features and benefits 2.6.5 Alarm hystorical data A new option is available in order to facilitate a knowledge of the last alarms registered on the LCD user’s interface. This  option is known as “Alarm hystorical data”. The software can save up to the last 20 alarms, showing on the screen the following data: - Date - Time - Alarm code TCGB0070 rev.3 - 04/2012...

  • Page 55: General Data

    3 General data G e n e r a l d a t a Index 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.

  • Page 56: Yutaki S System

    3 General data 3.1 YUTAKI S system RWM-2.0 RWM-3.0 RWM-4.0 RWM-5.0 RWM-6.0 RWM-8.0 RWM-10.0 Indoor unit (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E Model RAS-2 RAS-3 RAS-4 RAS-5 RAS-6 RAS-8 Outdoor unit HVRN2 HVRNME-AF H(V)RNME-AF H(V)RNME-AF H(V)RNME-AF HRNME-AF HRNME-AF (Min/Nominal/Max) ...

  • Page 57: Indoor Unit

    3 General data 3.2 Indoor unit RWM-2.0 RWM-3.0 RWM-4.0 RWM-5.0 RWM-6.0 Model (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E 1~ 230V 50Hz 1~ 230V 50Hz 1~ 230V 50Hz Electrical power supply 1~ 230V 50Hz 1~ 230V 50Hz 3N~ 400V 50Hz 3N~ 400V 50Hz 3N~ 400V 50Hz Pump input power 3 kW (step 1/ step 2/ step 3)
  • Page 58 3 General data Model RWM-8.0(H)FSN3E RWM-10.0(H)FSN3E Electrical power supply 3N~ 400V 50Hz 3N~ 400V 50Hz Pump input power 3 kW (step 1/ step 2/ step 3) Electric hea- 6 kW (step 1/ step 2/ step 3) ter power 9 kW (step 1/ step 2/ step 3) 3.0/6.0/9.0 3.0/6.0/9.0 Maximum electrical power consumption -/23 -/23 (1~ / 3N~) m³/h Nominal water flow (condition ) Height Outer Width dimensions Depth...

  • Page 59: Outdoor Unit

    3 General data 3.3 Outdoor unit 3.3.1 RAS-(2-6)(HVRN2/HVRNME-AF) RAS Model RAS-2HVRN2 RAS-3HVRNME-AF RAS-4HVRNME-AF RAS-5HVRNME-AF RAS-6HVRNME-AF Electrical power supply 1~ 230V 50Hz Color (Munsell code) Natural gray (1.0Y8.5/0.5) Sound pressure level dB(A) 45(43) 42(38) 44(40) 46(42) 48(45) (night mode) Sound power level dB(A) Height 1,380...

  • Page 60: Ras-(4-10)Hrnme-Af

    3 General data 3.3.2 RAS-(4-10)HRNME-AF RAS Model RAS-4HRNME-AF RAS-5HRNME-AF RAS-6HRNME-AF RAS-8HRNME-AF RAS-10HRNME-AF Electrical power supply 3N~ 400V 50Hz Color (Munsell code) Natural gray (1.0Y8.5/0.5) Sound pressure level dB(A) 44(40) 46(42) 48(45) 52(50) 55(53) (night mode) Sound power level dB(A) Height 1,380 1,380 1,380...

  • Page 61: Domestic Hot Water Tank

    3 General data 3.4 Domestic Hot Water Tank Model DHWT200E-2.5H1E DHWT300E-2.5H1E DHWT200S-2.5H1E DHWT300S-2.5H1E Color White Casing Material Polypropylene jacked  Height 1450 1935 1450 1935 Packing Width Depth Dimensions Height 1205 1685 1205 1685 Unit Width Depth Unit Weight Packed unit 95,5 70,5 Material Packing CARTON...

  • Page 62: Component Data

    3 General data 3.5 Component data 3.5.1 Indoor unit RWM-2.0 RWM-3.0 RWM-4.0 RWM-5.0 RWM-6.0 RWM-8.0 RWM-10.0 Model (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E Type Brazed plate Material Stainless steel Height (H) Dimensions Width (W) Depth (D) 71.2 71.2 93.6 125.0 125.0 183.2...

  • Page 63: Outdoor Unit

    3 General data 3.5.2 Outdoor unit  RAS-(2-6)(HVRN2/HVRNME-AF) Model RAS-2HVRN2 RAS-3HVRNME-AF RAS-4HVRNME-AF RAS-5HVRNME-AF RAS-6HVRNME-AF Heat exchanger type Multi-pass cross-finned tube Material Copper piping Outer diameter Ømm Piping Rows Number of tubes/coil Material Aluminum Pitch 1.45 Maximum operating pressure 4.15 4.15 4.15 4.15 4.15 Total face area 0.47...
  • Page 64 3 General data  RAS-(4-10)HRNME-AF Model RAS-4HRNME-AF RAS-5HRNME-AF RAS-6HRNME-AF RAS-8HRNME-AF RAS-10HRNME-AF Heat exchanger type Multi-pass cross-finned tube Material Copper piping Outer diameter Ømm Piping Rows Number of tubes/coil Material Aluminum Pitch Maximum operating pressure 4.15 4.15 4.15 4.15 4.15 Total face area 1.35 1.35 1.35...

  • Page 65: Electrical Data

    STC: Starting current: Less than maximum current. RNC: Running current. MC: Maximum current. N O T E • Heating inlet/outlet temperature condition: 30/35 ºC. • Cooling inlet/outlet temperature condition: 12/7 ºC. • The electrical data of RAS-2HVRN2 is not the same as the data shown in the outdoor unit specification plate. The spec. plate shows the air-to-air configuration data, not the air-to-water configuration, which it is shown in the table. • Specifications in these tables are subject to change without notice in order that HITACHI may bring the latest innovations to their customers. 3.6.2 Indoor unit Power supply Applicable voltage Water pump motor Electrical heater Model U max.

  • Page 66: Domestic Hot Water Tank

    3 General data 3.6.4 Domestic Hot Water Tank Main unit power Applicable voltage RAS Model IPT (kW) RNC (A) U (V) f (Hz) U max. (V) U min. (V) DHWT200E-2.5H1E DHWT300E-2.5H1E DHWT200S-2.5H1E DHWT300S-2.5H1E TCGB0070 rev.3 - 04/2012...

  • Page 67: Capacity And Selection Data

    4 Capacity and selection data C a p a c i t y a n d s e l e c t i o n d a t a Index 4.1. System selection procedure ........................68 4.1.1. Selection parameters ..........................68 4.1.2.

  • Page 68: System Selection Procedure

    4 Capacity and selection data 4.1 System selection procedure The following procedure gives an example of selection of YUTAKI S system based on a series of previously defined instal- lation requirements: heating/cooling load required, operating temperatures and special characteristics on the installation (energy system used, power source, etc.). 4.1.1 Selection parameters To calculate the YUTAKI S units, it will be necessary to consult and/or use a series of parameters shown in tables and graphics presented in the different chapters of this catalogue.
  • Page 69 4 Capacity and selection data •  Mono-energy system The YUTAKI S system is sized to provide 80% of the heating requirements on the coldest day of the year. An auxiliary electric heater (inside the indoor unit) is used to provide the additional heating required on the coldest days. Example of Mono-energy system (Mono-valent) N O T E • T...
  • Page 70 4 Capacity and selection data Procedure description The selection procedure given in this chapter is a simple example structured into 3 main blocks: First, a) once the energy system to be used has been chosen (Mono-energy for this example), the YUTAKI S system will be selected depending on the required regular heating load. Next, b) It will be check that the combination (YUTAKI S +  electric heater) covers the temporary needs of the coldest days of the year. Finally, c) it will be selected the Domestic Hot Water Tank accessory.
  • Page 71 4 Capacity and selection data N O T E In case of working with an ambient temperature value not included in the Maximum heating capacity tables of section Maximum heating capacity tables, (for example, -3 ºC), an interpolation will be needed, using the values above and below the ambient temperature. •  Step 2: Heating capacity correction for defrost and piping length The actual heating capacity of the pre-selected unit must be calculated applying the necessary correction factors: : Actual heating capacity (kW) : Maximum heating capacity (kW) : Defrost correction factor...
  • Page 72 4 Capacity and selection data b) Selection for the coldest days of the year (use of the auxiliary electric heater) The previous calculation shows that the RAS-4HVRNME-AF + RWM-4.0FSN3E system provides a heating capacity of 9.83 kW (-5 ºC WB), which is greater than the regular heating load necessary of 9.0 kW, but does not reach the peak heat- ing load of 12.0 kW (-15 ºC WB) necessary on the coldest days of the year. In this cases, the electric heater can provide  the auxiliary heating capacity to cover all the peak heating load. The aim of this section is to check that the energy system chosen (Mono-energy) covers the temporary heating require- ments for the coldest days of the year. • ...
  • Page 73 4 Capacity and selection data •  Step 3: Calculation for the heating capacity of the combination (YUTAKI S system with electric heater) Once applied the applicable correction factors, the actual heating capacity provided by the RAS-4HVRNME-AF + RWM-4.0FSN3E system is 8.35 kW. This heating capacity does not cover the required heating load for the coldest days  (12.0 kW). In these cases, the electric heater will provide the auxiliary capacity required to cover temporary heating needs. The electric heater of the RWM-4.0FSN3E unit provides a power of 6 kW which must be added to the ...
  • Page 74 Domestic Hot Water Tank RAS-2HVRN2 +RWM-2.0(H)FSN3E DHWT-200(E/S)-2.5H1E DHWT-300(E/S)-2.5H1E RAS-3HVRNME-AF + RWM-3.0(H)FSN3E RAS-4HVRNME-AF + RWM-4.0(H)FSN3E RAS-5HVRNME-AF + RWM-5.0(H)FSN3E RAS-6HVRNME-AF DHWT-300(E/S)-2.5H1E + RWM-6.0(H)FSN3E RAS-8HRNME-AF +RWM-8.0(H)FSN3E RAS-10HRNME-AF +RWM-10.0(H)FSN3E N O T E • The YUTAKI S system is designed for combination with HITACHI Domestic Hot Water Tank. In case of another tank is being used in combination with YUTAKI S system, HITACHI cannot guarantee neither good operation for reliability of the system. • This Domestic Hot Water Tank selection procedure is just orientated, be sure of consulting the local legislation to ensure a good water demand value. TCGB0070 rev.3 - 04/2012...
  • Page 75 4 Capacity and selection data  Cooling mode (only for RWM-(2.0-10.0)FSN3E) Procedure description Once verified that the selected system is able to cover all the heating needs, it is necessary to perform the same check for  cooling mode. Then, it is shown the calculation of the cooling capacity of the system. •  Step 1: Initial pre-selection Inlet/outlet water temperature 23/18 ºC Ambient temperature DB 30 °C Required cooling load 10.5 kW...
  • Page 76 4 Capacity and selection data Calculation of Q Once the correction factors to be applied have been determined, the formula for actual cooling capacity of the RAS-4HVRNME-AF + RWM-4.0FSN3E system can be applied: = 11.6 kW x 0.97 = 11.25 kW As can be seen, the actual cooling capacity of the RAS-4HVRNME-AF + RWM-4.0FSN3E system (11.25 kW) is greater ...

  • Page 77: Maximum Capacity Tables

    4 Capacity and selection data 4.2 Maximum capacity tables 4.2.1 Maximum heating capacity (kW) Ambient temperature (ºC WB) Water outlet System temperature (ºC) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) 2.35 2.40...
  • Page 78 4 Capacity and selection data Ambient temperature (ºC WB) Water outlet System temperature (ºC) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) 5.89 10.6 6.01 12.1 6.14 13.6 6.26 15.1 6.39 16.6 6.51...

  • Page 79: Maximum Cooling Capacity (Kw)

    4 Capacity and selection data 4.2.2 Maximum cooling capacity (kW) Ambient temperature (°C DB) Water outlet System temperature (ºC) CAP (kW) CAP (kW) CAP (kW) CAP (kW) CAP (kW) CAP (kW) CAP (kW) CAP (kW) RWM-2.0FSN3E RAS-2HVRN2 6..2 RWM-3.0FSN3E RAS-3HVRNME-AF 12.5 12.1 11.7...

  • Page 80: Heating Nominal Points Of Interest

    4 Capacity and selection data 4.3 Heating nominal points of interest The following table shows the nominal heating capacity and coefficient of performance at the specified conditions: RWM- RWM- RWM- RWM- RWM- RWM- RWM- Indoor unit 2.0(H)FSN3E 3.0(H)FSN3E 4.0(H)FSN3E 5.0(H)FSN3E 6.0(H)FSN3E 8.0(H)FSN3E 10.0(H)FSN3E Model RAS- RAS- RAS- RAS- RAS- RAS- RAS- Outdoor unit 2HVRN2 3HVRNME-AF 4H(V)RNME-AF 5H(V)RNME-AF 6H(V)RNME-AF...

  • Page 81: Correction Factors

    4 Capacity and selection data 4.4 Correction factors 4.4.1 Defrost correction factor The maximum heating capacity shown above does not include operation during frost or defrosting. When this type of operation is taken into account, the heating capacity must be corrected according to the following equa- tion: Correction heating capacity = Correction factor x heating capacity Outdoor inlet air temp. (ºC DB) (HR = 85% ) Defrost correction factor f 0.95...
  • Page 82 4 Capacity and selection data  Heating piping length correction factor N O T E Take note that the piping length specified in the following graphics is the equivalent piping length (EL), consid- ering the possible elbows, bends... The actual piping length (L) is slightly lower, 30 m. RAS-3HVRNME-AF RAS-2HVRN2 RAS-4H(V)RNME-AF RAS-5H(V)RNME-AF RAS-6H(V)RNME-AF RAS-8HRNME-AF TCGB0070 rev.3 - 04/2012...
  • Page 83 4 Capacity and selection data RAS-10HRNME-AF N O T E The heating capacity should be corrected according to the following formula: THA = TH x PH THA: Actual corrected heating capacity (kW) TH: Heating capacity from heating capacity table (kW). PH: Heating piping length correction factor (in %).  Cooling piping length correction factor N O T E Take note that the piping length specified in the following graphics is the equivalent piping length (EL), consid- ering the possible elbows, bends... The actual piping length (L) is slightly lower, 30 m. RAS-2HVRN2 RAS-3HVRNME-AF TCGB0070 rev.3 - 04/2012...
  • Page 84 4 Capacity and selection data RAS-4H(V)RNME-AF RAS-5H(V)RNME-AF RAS-6H(V)RNME-AF RAS-8HRNME-AF RAS-10HRNME-AF N O T E The cooling capacity should be corrected according to the following formula: TCA = TC x PC TCA: Actual corrected cooling capacity (kW) TC: Cooling capacity from the cooling capacity table (kW). PC: Cooling piping length correction factor (in %). TCGB0070 rev.3 - 04/2012...

  • Page 85: Acoustic Characteristic Curves

    5 Acoustic characteristic curves A c o u s t i c c h a r a c t e r i s t i c c u r v e s Index 5.1. Overall sound level ..........................86 5.1.1. Outdoor unit ...............................

  • Page 86: Overall Sound Level

    5 Acoustic characteristic curves 5.1 Overall sound level The sound pressure level was measured under the following conditions: 1 Distance of the unit from the measuring point: At 1 meter from the unit’s front surface; 1,5 meter from floor level. 2 Power supply: a. RAS-(2-6)(HVRN2/H(V)RNME-AF): 1~ 230V 50Hz. b. RAS-(4-10)HRNME-AF: 3N~ 400V 50Hz. N O T E • The above data is measured in an anechoic chamber, so reflected sound should be taken into consideration when installing the unit. • The data indicated is based on cooling mode. In the case of heating mode, the sound pressure level increases from 1 to 2 dB(A).

  • Page 87: Outdoor Unit

    5 Acoustic characteristic curves 5.1.1 Outdoor unit RAS-2HVRN2 RAS-3HVRNME-AF Heating Heating Cooling Cooling Night shift Night shift Approximate threshold Approximate threshold of continuous noise of continuous noise detection detection Frequency (Hz) Frequency (Hz) Sound pressure level: Cooling (Night mode); 45 (43) dB(A) Sound pressure level: Cooling (Night mode);...
  • Page 88 5 Acoustic characteristic curves RAS-6HVRNME-AF RAS-4HRNME-AF Heating Heating Cooling Cooling Night shift Night shift Approximate threshold Approximate threshold of continuous noise of continuous noise detection detection Frequency (Hz) Frequency (Hz) Sound pressure level: Cooling (Night mode); 48 (45) dB(A) Sound pressure level: Cooling (Night mode); 44 (40) dB(A) RAS-5HRNME-AF RAS-6HRNME-AF Heating...

  • Page 89: Indoor Unit

    5 Acoustic characteristic curves RAS-8HRNME-AF RAS-10HRNME-AF Cooling Cooling Heating Heating Night shift Night shift Approximate threshold Approximate threshold of continuous noise of continuous noise detection detection Frequency (Hz) Frequency (Hz) Sound pressure level: Cooling (Night mode); 52 (50) dB(A) Sound pressure level: Cooling (Night mode); 55 (53) dB(A) 5.1.2 Indoor unit Model Sound pressure level (dB(A))

  • Page 91: Working Range

    6  Working range W o r k i n g   r a n g e Index 6.1. Temperature range ..........................92 6.1.1. Heating mode ............................92 6.1.2. Cooling mode ............................93 TCGB0070 rev.3 - 04/2012...

  • Page 92: Temperature Range

    6  Working range 6.1 Temperature range RWM-2.0 RWM-3.0 RWM-4.0 RWM-5.0 RWM-6.0 RWM-8.0 RWM-10.0 MODEL (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E (H)FSN3E Water temperature ºC Refer to the graphics for each case Minimum flow rate Maximum flow rate Minimum installation water volume Minimum allowable water pressure Maximum allowable water pressure MPa 6.1.1 Heating mode ...

  • Page 93: Cooling Mode

    6  Working range  Swimming pool heating Swimming pool water temperature (ºC) Ambient temperature (ºC WB) 6.1.2 Cooling mode  Space cooling Water outlet temperature (ºC) Refreshing floor working  area Fan coil working  area N O T E (*): 2HP system only Ambient (RAS-2HVRN2 + RWM-2.0FSN3E). temperature (ºC DB) TCGB0070 rev.3 - 04/2012...

  • Page 95: General Dimensions

    7 General dimensions G e n e r a l d i m e n s i o n s Index 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.

  • Page 96: Dimensions

    7 General dimensions 7.1 Dimensions 7.1.1 Indoor unit  RWM-(2.0-6.0)(H)FSN3E (wall fixing holes) Refrigerant liquid pipe Refrigerant gas pipe Water inlet/outlet pipe For water inlet/outlet connection (factory supplied) Part name Part name Plate heat exchanger Manometer Pump Electrical box Electric heater LCD user’s interface Expansion vessel Water inlet pipe...
  • Page 97 7 General dimensions  RWM-(8.0/10.0)(H)FSN3E (wall fixing holes) Refrigerant liquid pipe Refrigerant liquid pipe Water inlet/outlet pipe For water inlet/outlet connection (factory supplied) Part name Part name Plate heat exchanger Manometer Pump Electrical box Electric heater LCD user’s interface Expansion vessel Water inlet pipe Water strainer Water outlet pipe Air purger...

  • Page 98: Outdoor Unit

    7 General dimensions 7.1.2 Outdoor unit  RAS-2HVRN2 2-U Cut holes 2-holes Rear side Part name Remarks RAS-2HVRN2 Ø12.70 Ø6.35 Units: mm Part name Remarks Air inlet Air outlet Holes for power supply wiring Holes for control line wiring Gas piping connection Øa flare nut Liquid piping connection Øb flare nut...
  • Page 99 7 General dimensions  RAS-3HVRNME-AF Units in: mm Part name Remarks Air inlet Air outlet Service cover Electrical switch box Holes for refrigerant piping and electrical wiring piping Drain holes 4-Ø24 Drain holes 1-Ø26 Holes for fixing machine to wall 4-(M5) Refrigerant liquid pipe Flare nut: Ø9.53 (3/8”) Refrigerant gas pipe Flare nut: Ø15.88 (5/8”) TCGB0070 rev.3 - 04/2012...
  • Page 100 7 General dimensions  RAS-(4-6)H(V)RNME-AF Units in: mm Part name Remarks Air intake Air outlet Service cover Electrical switch box Holes for refrigerant piping and electrical wiring piping Drain holes 3-Ø24 Drain holes 2-Ø26 Holes for fixing machine to wall 4-(M5) Refrigerant liquid pipe Flare nut: Ø9.53 (3/8”) Refrigerant gas pipe Flare nut: Ø15.88 (5/8”) TCGB0070 rev.3 - 04/2012...
  • Page 101 7 General dimensions  RAS-(8/10)HRNME-AF Model RAS-8HRNM-AF Ø9.53 (3/8”) RAS-10HRNM-AF Ø12.7 (1/2”) Units in: mm Part name Remarks Air inlet Air outlet Service cover Electrical switch box Holes for refrigerant piping and electrical wiring piping Drain holes 3-Ø24 Drain holes 2-Ø26 Holes for fixing machine to wall 4-(M5)

  • Page 102: Domestic Hot Water Tank

    7 General dimensions 7.1.3 Domestic Hot Water Tank  DHWT (200/300)S-2.5H1E PARTIAL SECTION SECTION -X-X- FOR -R- kw/e- Cold water input/drain ww- Hot water output z- Recirculation kv- Heat Pump feed kr- Heat Pump eh- Side connection TM- Sensor PLAN VIEW Part name DHWT200S-2.5H1E DHWT300S-2.5H1E A: External diameter B: Total length (without pipes) 1205 1685...
  • Page 103 7 General dimensions  DHWT (200/300)E-2.5H1E DHWT200E-2.5+H1E DHWT300E-2.5H1E SECTION -A-A- SECTION -A-A- kw/e- Cold water input/drain ww- Hot water output z- Recirculation kv- Heat Pump feed kr- Heat Pump return PC- Cathodic protection TM- Sensor Part name DHWT200E-2.5H1E DHWT300E-2.5H1E A: External diameter B: Total length (without pipes) 1205 1685 Kw: Cold water input/drain (external thread) 1”...

  • Page 104: Service Space

    7 General dimensions 7.2 Service space 7.2.1 Indoor unit N O T E • H= 1200mm - 1500mm. Recommended unit height for proper access to the control panel (LCD user’s interface). • h= 350mm. Minimum unit height for installing the shutdown valves and the first bending pipe line. 7.2.2 Outdoor unit  RAS-2HVRN2  RAS-(3-6)H(V)RNME-AF  RAS-(8/10)HRNME-AF N O T E For the specific information, please refer to Service Manual (SMXX0070). TCGB0070 rev.3 - 04/2012...

  • Page 105: Refrigerant Cycle

    8 Refrigerant cycle R e f r i g e r a n t c y c l e Index 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.

  • Page 106: Ras-2Hvrn2 + Rwm-2.0(H)Fsn3E Combination

    8 Refrigerant cycle 8.1 RAS-2HVRN2 + RWM-2.0(H)FSN3E combination TCGB0070 rev.3 - 04/2012...

  • Page 107: Ras-3Hvrnme-Af + Rwm-3.0(H)Fsn3E Combination

    8 Refrigerant cycle 8.2 RAS-3HVRNME-AF + RWM-3.0(H)FSN3E combination TCGB0070 rev.3 - 04/2012...

  • Page 108: Ras-(4-6)H(V)Rnme-Af + Rwm-(4.0-6.0)(H)Fsn3E Combination

    8 Refrigerant cycle 8.3 RAS-(4-6)H(V)RNME-AF + RWM-(4.0-6.0)(H)FSN3E combination TCGB0070 rev.3 - 04/2012...

  • Page 109: Ras-(8/10)Hrnme-Af + Rwm-(8.0/10.0)(H)Fsn3E Combination

    8 Refrigerant cycle 8.4 RAS-(8/10)HRNME-AF + RWM-(8.0/10.0)(H)FSN3E combination TCGB0070 rev.3 - 04/2012...

  • Page 111: Piping Work And Refrigerant Charge

    9  Piping work and  refrigerant charge P i p i n g   w o r k   a n d   r e f r i g e r a n t   c h a r g e Index 9.1. Refrigerant piping ..........................

  • Page 112: Refrigerant Piping

    9  Piping work and  refrigerant charge 9.1 Refrigerant piping 9.1.1 Refrigerant piping length The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following chart. Keep the design point within the area of the chart, which is showing the applicable height difference according to piping length.

  • Page 113: Copper Pipes, Measurements And Connection

    9  Piping work and  refrigerant charge 9.2 Copper pipes, measurements and connection 9.2.1 Copper pipes and measurements C A U T I O N • The copper pipe used in the refrigeration installations is different to the copper pipe used in installations ca- rrying domestic or heating water. • The copper pipe for refrigeration installations is especially treated for outdoors and indoors. The interior sur- face finish makes it easier for the refrigerant to circulate and withstands the action of the lubricant oil used in outdoor units. Prepare the copper pipes provided by the supplier. Select the pipe with the appropriate diameter and thickness. Use the table below to select the most appropriate pipe: Nominal diameter Thickness mm Supply Inches...

  • Page 114: Pipe Connection

    9  Piping work and  refrigerant charge 9.2.2 Pipe connection Cover the end of the pipe appropriately when it is to be inserted through holes in walls and roofs, etc. Keep the ends of the pipes covered while other installation work is  being carried out to avoid the entry of dampness or dirt. Do not place the pipes directly on the ground without appropriate protection or adhesive vinyl tape to cover the ends.

  • Page 115: Precautions In The Event Of Gas Refrigerant Leaks

    9  Piping work and  refrigerant charge 9.4 Precautions in the event of gas refrigerant leaks The installers and those responsible for drafting the specifications are obliged to comply with local safety codes and regu- lations in the case of refrigerant leakage. 9.4.1 Maximum permitted concentration of HFCs The refrigerant R410A, charged in the RASC series system, is an incombustible and non-toxic gas. However, if leakage  occurs and gas fills a room, it may cause suffocation. The maximum permissible concentration of HFC gas, R410A in air is 0.44 kg/m³, according to EN378-1. Therefore, some effective measure must be taken to lower the R410A concentration in air below 0.44 kg/ m³, in case of  leakage. 9.4.2 Calculation of refrigerant concentration 1 Calculate the total quantity of refrigerant R (kg) charged in the system by connecting all the indoor units in the rooms  to be air-conditioned. 2 Calculate the room volume V (m³) of each room. 3 Calculate the refrigerant concentration C (kg/m³) of the room according to the following equation: ...

  • Page 116: Countermeasure In The Event Of Refrigerant Leakage

    9  Piping work and  refrigerant charge 9.4.3 Countermeasure in the event of refrigerant leakage The facility must have the following features in case of a refrigerant leakage occurs: 1 Provide a shutterless opening which will allow fresh air to circulate into the room. 2 Provide a doorless opening of 0.15% or more size to the floor area. 3 There must be a ventilator fan connected to a gas leak detector, with a ventilator capacity of 0.4 m³/min or higher per  Japanese refrigeration ton (= compressor displacement volume / 5.7 m³/h) of the air conditioning system using the refrigerant.

  • Page 117: Refrigerant Pipe Work

    9  Piping work and  refrigerant charge 9.5 Refrigerant pipe work 9.5.1 General notes before performing pipe work 1 Prepare locally-supplied copper pipes. 2 Select the piping size with the correct thickness and correct material able to withstand sufficient pressure. 3   S elect clean copper pipes. Make sure that there is no dust or moisture inside the pipes. Blow the inside of the pipes  with oxygen free nitrogen to remove any dust and foreign materials before connecting them. N O T E A system with no moisture or oil contamination will give maximum performance and lifecycle compared to that of a poorly prepared system. Take particular care to ensure that all copper piping is clean and dry internally.

  • Page 118: Pipe Work And Connection

    9  Piping work and  refrigerant charge Do not fix the refrigerant and water pipes directly with the metal fittings (refrigerant piping may expand and contract). Some  examples for suspension method are shown below. For piping along For Suspending For instant insta- the wall Heavies llation work 9.5.3 Pipe work and connection Before performing the pipe work and pipe connections, the unit cover must be removed (follow chapter Indoor Unit Insta- llation in reverse).  Piping location Refer to the figure below detailing the location of the refrigerant pipes, dimensions and connection sizes. N O T E There is a label behind the pipes indicating its circuit connection.
  • Page 119 9  Piping work and  refrigerant charge  Dimensions of the flared pipe units: mm (inch) Nominal External diameter diameter Ø +0/-0.4 (1/4) 6.35 (3/8) 9.53 13.2 (1/2) 12.7 16.6 (5/8) 15.88 19.7  Thickness of the copper pipes units: mm (inch) Nominal External Thickness diameter...

  • Page 120: Brazing Work Considerations

    9  Piping work and  refrigerant charge 9.5.4 Brazing work considerations C A U T I O N • Use nitrogen gas for blowing during pipe brazing. If oxygen, acetylene or fluorocarbon gas is used, it will cau- se an explosion or poisonous gas. • A rust coating will appear inside of tubes if no nitrogen gas blowing is performed during brazing work. This film will be flecked off after operation and will circulate in the circuit, resulting in clogged expansion valves, etc, and the compressor will be affected. • Use a reducer valve when nitrogen gas blowing is performed during brazing. The gas pressure should be maintained within 0.03 to 0.05 MPa. If excessively high pressure is applied to a pipe, it will cause an explosion.

  • Page 121: Water Piping Connection

    9  Piping work and  refrigerant charge 9.6.2 Water piping connection  Piping location and connection size The unit is factory supplied with two shutdown valves to be connected to the water inlet / outlet pipe. By using these shut- down valves it is very practical to connect the indoor unit to the heating system by using flexible joints just bellow the valves  (G 1-1/4” connection). Refer to the figure below detailing the location of the Water Pipes location, dimensions and Connection sizes.

  • Page 122: Draining Pipe Work

    9  Piping work and  refrigerant charge 9.6.3 Draining pipe work Connect the drain pipe coming from the safety valve (located with the water IN/OUT pipes) to the general draining system. N O T E The safety valve will be activated when water pressure reaches 3 bars. •  Two draining ports are provided with the factory supplied shutdown valves, and a draining cap on the expansion ves- sel to drain the water from the indoor unit in case of servicing.
  • Page 123 9  Piping work and  refrigerant charge  Pressure lost calculation The indoor unit is factory supplied with two Shutdown Valves which are provided with a Pressure Port . The object of these  Pressure Ports, is to offer the installer a quick connection to read the Lost Pressure in the circuit when commissioning.  Plug in a differential Manometer to the Pressure Ports and open the inlet / outlet ports (1*) The Pressure Lost is calculated from the pressure difference between the value of the inlet and the outlet water pressure. N O T E (1*) If there is no having a Differential Manometer, it is possible to do this operation with just one std. Manometer...

  • Page 124: Pressure Charts

    9  Piping work and  refrigerant charge 9.7 Pressure charts  RWM-(2.0-10.0)(H)FSN3E RWM-2.0(H)FSN3E RWM-3.0(H)FSN3E Water flow Water flow RWM-4.0(H)FSN3E RWM-5.0(H)FSN3E Water flow Water flow TCGB0070 rev.3 - 04/2012...
  • Page 125 9  Piping work and  refrigerant charge RWM-6.0(H)FSN3E RWM-8.0(H)FSN3E Water flow Water flow RWM-10.0(H)FSN3E Water flow N O T E V: Pump motor speed (V : Low, V : Medium, V : High) TCGB0070 rev.3 - 04/2012...

  • Page 126: Dhwt - Domestic Hot Water Tank

    9  Piping work and  refrigerant charge 9.8 DHWT - Domestic Hot Water tank 9.8.1 Hydraulic circuit When Piping connections are performed: 1 Connect all pipes as close as possible to the unit, so that disconnection can be easily performed when required. 2 It is recommended to use flexible joints for the piping of water inlet and outlet, so vibration will not be transmitted. 3 Whenever possible, sluice valves should be installed for water piping, in order to minimise flow resistance and to main- tain sufficient water flow.

  • Page 127: Pressure Drop

    9  Piping work and  refrigerant charge 9.8.2 Pressure drop DHWT(200/300)E-2.5H1E DHWT(200/300)S-2.5H1E 9.8.3 General standard for hydraulic installation The safety valve unit will fitted at the sanitary water installation. A pressure reducer must be placed in the DHWT installation. The nominal pressure of the safety unit will be 8 bar. When the main pressure is more than 6 bar a pressure reducer should be installed. The water discharge during heating (expansion) is normal.

  • Page 129: Electrical Wiring

    10 Electrical wiring E l e c t r i c a l w i r i n g Index 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 indoor unit ......................133 10.2.

  • Page 130: Power Supply

    10 Electrical wiring 10.1 Power supply 10.1.1 General check Service voltage Between 90 and 110% of the rated voltage. Start-up voltage Between 85 and 115% of the rated voltage. Voltage imbalance Up to 3% in each phase, measured at the main terminal of the outdoor unit. Electromagnetic compatibility According to Directive 2004/108/EC (89/336/EEC) regarding electromagnetic compatibility, the following table indicates: the maximum allowed impedance Z...

  • Page 131: Electrical Connection Of Outdoor Unit

    10 Electrical wiring D A N G E R • Check to ensure that screws for terminal block are tightly tightened. • Do not connect of adjust any wiring or connections unless the main power switch is OFF. • Check that the earth wire is securely connected, tagged and locked in accordance with national and local codes. C A U T I O N • Check to ensure that the indoor pump and the outdoor fan have stopped before electrical wiring work or pe- riodical check is performed.
  • Page 132 10 Electrical wiring RAS-(4-6)HRNME-AF RAS-(8/10)HRNME-AF Band Earth Ring core Transmitting Power source cable Power Earth Transmission cable Earth cable wires terminal wires 3 Connect the transmission wires between the outdoor unit and the indoor unit to the terminals 1 and 2 on the terminal board.

  • Page 133: Electrical Connection Of Outdoor Unit

    10 Electrical wiring 10.1.3 Electrical connection of outdoor unit  Wiring connection The correct electrical wiring connection for the indoor unit is shown below: 1 Using the appropriate cable, connect the power circuit to the appropiatre terminals as shown on the wiring label and the illustration bellow.
  • Page 134 10 Electrical wiring  Terminal board connections Mark Part name Description TERMINAL BOARD 1 (TB1) AC 230V AC 400V Main power supply connection TERMINAL BOARD 2 (TB2) Indoor/Outdoor commu- The H-LINK transmission between outdoor unit and indoor unit is tation cables wired to terminals 1-2.

  • Page 135: Setting Of Dip Switches And Rsw Switches

    10 Electrical wiring 10.2 Setting of DIP switches and RSW switches 10.2.1 Outdoor unit  Location of DIP switches and RSW switches The PCB (see the electrical wiring diagram - plane a) in the outdoor unit is operated with different dip switches, rotary switches and push switches.
  • Page 136 10 Electrical wiring DSW2: Piping length/selection function Function Setting position Setting before shipment 1 2 3 4 5 6 5 m < Lt 1 2 3 4 5 6 Piping length 5 m < Lt < 30 m 1 2 3 4 5 6 Cancellation of outdoor hot start control.
  • Page 137 10 Electrical wiring DSW4/RSW1: Refrigerant cycle setting (No change) Setting position (DSW4) Setting position (RSW1) Setting for tens Setting for units (first digit) (second digit) 1 2 3 4 5 6 Rotary switches' positions (RSW1) are set by inserting a screw driver into the groove. DSW5: Transmission setting of end terminal resistance Before shipment, No.

  • Page 138: Indoor Unit

    10 Electrical wiring 10.2.2 Indoor unit  Location of DIP switches and RSW switches Below are the dip switch positions: Upper side shows unit status Lower side shows unit status 2 Status indication. Press PSW2 more than 3 se- conds to change the sta- tus display mode N O T E • The mark “■” indicates the dip switches positions.
  • Page 139 10 Electrical wiring  Functions of dip switches and rotary switches DSW1: Not used DSW2: Unit capacity setting RWM-2.0(H)FSN3E RWM-3.0(H)FSN3E RWM-4.0(H)FSN3E RWM-5.0(H)FSN3E RWM-6.0(H)FSN3E RWM-8.0(H)FSN3E RWM-10.0(H)FSN3E DSW3: Additional settings Setting before shipment N.A (not used) N.A (not used) 1-step heater for 3-phase unit N.A.
  • Page 140 10 Electrical wiring DSW4: Additional setting Setting before shipment Optional functions enabled Heater Forced OFF N.A. (Not used) Standard / ECO water pump operation Emergency operation heater Cooling operation Outdoor sensor accessory N.A (not used) N O T E Never activate Heater Forced OFF and Emergency operation heater at the same time. C A U T I O N Never turn all DSW4 dip switch pins ON. If this happens, the software of the unit will be removed.
  • Page 141 10 Electrical wiring RSW1 & RSW2: Refrigerant cycle setting Refrigerant cycle setting: RSW1: Ten digits RSW2: Unit digits RSW3 & RSW4: Indoor unit address setting Refrigerant cycle setting: RSW3: Ten digits RSW4: Unit digits  Led indications LED1: Pump operation LED1 Status Pump operation ON...
  • Page 142 10 Electrical wiring LED5: Power supply indication Status LED5 Supply ON Supply OFF LED6: Alarm indication Status LED5 Alarm ON ON (flick) Alarm OFF LED7: Not used LED8: H-Link transmission indication TCGB0070 rev.3 - 04/2012...

  • Page 143: Common Wiring

    10 Electrical wiring 10.3 Common wiring C A U T I O N All the field wiring and electrical components must comply with local codes. 10.3.1 Electrical wiring between outdoor and indoor unit Connect the electrical wires between the indoor unit and the outdoor unit, as shown in the next diagram. Follow the local codes and regulations when performing the electrical wiring.

  • Page 144: Wire Sizes

    10 Electrical wiring 10.3.2 Wire sizes •  Recommended minimum sizes for field provided wires Power Transmi- Actuator Max. Required Required supply cable ting Cable quired cable size Model Power supply Current number number size Size number of wires of wires of wires EN60335-1 EN60335-1 EN60335-1 RWM-2.0(H)FSN3E 4.0 mm²...

  • Page 145: Domestic Hot Water Tank

    10 Electrical wiring 10.4 Domestic Hot Water Tank 10.4.1 Electrical wiring connection The electrical wiring connection between DHWT and Yutaki system is as follows: Customer connection: Power supply: Electric heater DHWT Sensor DHWT 1~ 230V 50Hz Pump con- nection 10.4.2 Wire size •  Recommended minimum size for field provided wires: Power supply EH control Sensor cable Maximum cable size cable size size...

  • Page 147: Installation Configuration

    11 Installation configurations I n s t a l l a t i o n c o n f i g u r a t i o n Index 11.1. Heating system configurations ......................148 11.1.1. System configuration ..........................148 11.1.2. Typical installation samples ........................149 11.2.

  • Page 148: Heating System Configurations

    11 Installation configurations 11.1 Heating system configurations The split air to water heat pump is designed to work in mono-energetic or bi-valent heating systems. It provides efficient  control and reduces energy use while maintaining comfort in the building. The functionality of the split air to water heat pump depends on the installed components and the selected configuration  and it can be configured and upgraded to meet many application requirements. 11.1.1 System configuration  Mono-valent system The split air to water heat pump is sized to provide 100% of the heating requirements on the coldest day the year. ...

  • Page 149: Typical Installation Samples

    11 Installation configurations 11.1.2 Typical installation samples N O T E The following installation examples show typical configurations only for heating application. In case of varia- tions of them, the responsability of correct system functioning will be of the installer. The configuration examples given below are only for illustration purposes.  Installation example 1 Only space heating application: Space heating using radiators (fan coils) or radiant floor application with an optional room  thermostat Item Description Outdoor unit Indoor unit Heat exchanger Electrical heater High Temperature Low Temperature (60ºC) (35ºC) Water pump (primary) Valves (factory supplied) R410a ...
  • Page 150 11 Installation configurations  Installation example 3 Two space heating applications (High & Low water temperature): When the split air to water heat pump is connected to two different heating circuits, circuit 1 will be direct (high temperature for radiator operation) and circuit 2 will be a mixing circuit in order to have a second temperature control using mixing valve (low temperature for floor heating operation). Optional ...
  • Page 151 11 Installation configurations  Installation example 5 Alternating Space heating + Boiler combination. Space heating application with optional Room Thermostat and alternating Boiler combination. Option 1: Hydraulic separator Item Description High Temperature Low Temperature Outdoor unit (60ºC) (35ºC) Indoor unit Heat exchanger Electrical heater Water pump (primary)
  • Page 152 11 Installation configurations  Installation example 6 Installation with alternating space heating + Domestic Hot Water Tank + Boiler combination: Space heating application  with optional Room Thermostat and Domestic Hot Water Tank heated by alternating Heat Pump and boiler combination.  Item Description Outdoor unit Indoor unit Heat exchanger High Tempera- Low Tempera- Electrical heater ture (60ºC) ture (35ºC) DHWT Water pump (primary) Valves (factory supplied) Domestic Hot Water Tank  (DHWT) (accessory) 3-way valve for DHWT (acces- sory) DHWT Second temperature kit (acces-...
  • Page 153 11 Installation configurations  Installation example 8 Two space heating applications (High & Low water temperature) + Domestic Hot Water Tank + Combination with Boiler  in parallel: Two space heating application with a Room Thermostat as an option and Domestic Hot Water Tank heated by  Heat Pump and boiler combination in parallel Item Description Outdoor unit Indoor unit Heat exchanger Electrical heater Water pump (primary) High Temperature Low Temperature Valves (factory supplied) (60ºC) (35ºC) Domestic Hot Water Tank (DHWT)  (accessory) DHWT 3-way valve for DHWT (accessory) Second temperature kit (accessory)

  • Page 154: Cooling System Configurations

    11 Installation configurations 11.2 Cooling system configurations N O T E • The following installation examples show typical configurations only for cooling application. In case of heating installation working also in cooling operation, the responsability of correct system functioning will be of the installer. The configuration examples given below are only for illustration purposes. • The split air to water heat pump is pre-configurated to work only in heating mode. In order to allow the only cooling mode, it is necessary to perform a dip-switch setting and install the drain pan accessory. In the case, all the heating mode uses for the unit will be prohibited and the LCD user’s interface heating configuration will disappear.  Installation example 9 Direct space cooling installations: Space cooling by Fan coil application with optional Room Thermostat. Item Description Outdoor unit Indoor unit Heat exchanger...
  • Page 155 11 Installation configurations  Installation example 11 Using Refreshing floor with Heating radiators closed: Use refreshing floor for cooling and close Radiators using Valve. Item Description High Temperature (60ºC) Low Temperature Outdoor unit (21ºC) Indoor unit Heat exchanger Electrical heater Water pump (primary) Valves (factory supplied) Second temperature kit (acces- Two2 sory) Motorized valve (field supplied) Vmix 2nd Temperature sensor signal (accessory) Secondary water pump signal Mixing valve signals R410a...
  • Page 156 11 Installation configurations  Installation example 13 Two space cooling installations (Fan coils +Refreshing floor): Space cooling application with optional Room Thermostat. Item Description Low Temperature (5ºC) Medium Temperature (21ºC) Outdoor unit Indoor unit Heat exchanger Electrical heater Water pump (primary) Valves (factory supplied) Two2 Second temperature kit (acces- sory) Motorized valve (field supplied) Vmix 2nd Temperature sensor signal (accessory) Secondary water pump signal Mixing valve signal R410a...

  • Page 157: Additional Combinations

    When the swimming pool operation is required, the siwimming pool pump starts to operate given the swimming pool pump feedback. In this situation, the 3-way valve of the DHWT is not activated and the 3-way valve for the swimming pool chan- ges its normal postion diverting to the swimming pool heat exchanger, allowing to heat the swimming pool water tempera- ture to a confortable value. Hitachi DHWT Accessory Space Heating & Cooling DHWT Space Heating &...
  • Page 158 11 Installation configurations  Option 2 The solar panels gather heat from the sun. When the temperature of the glycol solution in the solar panel rises above the water temperature in the domestic hot water tank, solar pump station’s pump is switched ON and the solar kit’s 3-way valve  is diverted to the Sanitary Tank. At the same time, the DHW’s 3-way valve is switched OFF and the heat pump continues  working to heat the space.  Field Supply 3wv Solar Solar o solar combina- Pump & tion options Control (space heating/swi-...

  • Page 159: Optional Functions

    12 Optional functions O p t i o n a l f u n c t i o n s Index 12.1. Optional functions of the indoor unit ....................160 TCGB0070 rev.3 - 04/2012...

  • Page 160: Optional Functions Of The Indoor Unit

    There are available four output optional signals that provide four optional functions of the system, programmed on the indoor unit PCB. N O T E Available four external outputs signals In order to make easy the electrical connection works, HITACHI offers (as accessory) a relay board for the additional output sig- nals. N O T E For the detailed information about the Optional functions of the indoor units, please refer to the Service Manual (SMXX0070).

  • Page 161: Troubleshooting

    13 Troubleshooting T r o u b l e s h o o t i n g Index 13.1. On screen during abnormal operation ....................162 13.2. Alarm codes ............................162 TCGB0070 rev.3 - 04/2012...

  • Page 162: On Screen During Abnormal Operation

    13 Troubleshooting 13.1 On screen during abnormal operation Alarm Code Indication on LCD user’s interface: Alarm code Alarm indication 13.2 Alarm codes Retry Alarm Stop Origin Detail of Abnormality Main cause Code Code Activation of Outdoor Unit Protection Device – Outdoor High-pressure interrupting device activated (Except for Alarm Codes 41, 42)
  • Page 163 13 Troubleshooting Retry Alarm Stop Origin Detail of Abnormality Main cause Code Code Indoor units with the same number in a refrigerant piping – Outdoor Indoor Unit Number Setting Error system Outdoor Protection Detection Circuit – Outdoor Outdoor PCB abnormality, Error in wiring to outdoor PCB Abnormality Outdoor heat exchanger clogging/short circuit, Broken ...
  • Page 166 Hitachi Air Conditioning Products Europe, S.A. Ronda Shimizu, 1 - Políg. Ind. Can Torrella 08233 Vacarisses (Barcelona) España Hitachi certifies that our products have met EU consumer safety, health and environmental requirements. Hitachi Air Conditioning Products Europe, S.A. is certified with:...

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