Hitachi YUTAKI S COMBI Series Installation And Operation Manual
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Hitachi YUTAKI S COMBI Series Installation And Operation Manual

Hitachi YUTAKI S COMBI Series Installation And Operation Manual

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INSTALLATION
AND OPERATION
MANUAL
–
YUTAKI S COMBI SERIES
INDOOR UNITS
MODELS
SPLIT SYSTEM
RWD-(1.5-3.0)RW2E-220S(-K/6H)
PMEN0645 rev.0 - 04/2023

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Summary of Contents for Hitachi YUTAKI S COMBI Series

  • Page 1 – INSTALLATION AND OPERATION MANUAL – YUTAKI S COMBI SERIES INDOOR UNITS MODELS SPLIT SYSTEM RWD-(1.5-3.0)RW2E-220S(-K/6H) PMEN0645 rev.0 - 04/2023...
  • Page 3 The English version is the original one; other languages are translated from English. Should any discrepancy occur between the English and the translated versions, the English version shall prevail. La versión en inglés es la original, y las versiones en otros idiomas son traducciones de la inglesa. En caso de discrepancias entre la versión inglesa y las versiones traducidas, prevalecerá...
  • Page 4 Originální verze tohoto dokumentu je v angličtině; ostatní jazykové varianty jsou z angličtiny přeložené. Pokud mezi anglickou a jakoukoli jinou jazykovou verzí dojde k rozporu, bude převažovat anglická verze. Az eredeti változat az angol; az egyéb nyelvű változatok angolról lettek fordítva. Amennyiben az angol és a fordított verziók között bármilyen eltérés mutatkozik, az angol nyelvű...

  • Page 5: Table Of Contents

    Contents General information .....................1 Name of parts and Dimensional data ..............9 Electrical data .....................11 Working range ....................15 Refrigerant piping ....................19 Electrical and control settings ................33 Maintenance.......................55 Commissioning ....................60 ERP Data ......................66 PMEN0645 rev.0 - 04/2023...
  • Page 6 General Index 1. General information ....................1 1.1 General information ..................2 1.1.1 General notes ..................2 1.2 Applied symbols....................3 1.3 Additional information about safety ..............4 1.4 Important notice ....................5 1.5 Product guide ....................6 1.5.1 Classification of the units ................6 1.5.1.1 Split system - Indoor unit - YUTAKI S Combi ........6 1.5.2 Product list ....................7 1.5.2.1 Split system - Indoor unit - YUTAKI S Combi ........7 2. Name of parts and Dimensional data...
  • Page 7 4.2.3 Swimming pool heating .................17 4.2.4 Space cooling (Necessary cooling kit) ...........17 4.3 R32 Hydraulic working range ................18 4.3.1 Hydraulic data ..................18 4.3.2 Pump performance curves ..............18 5. Refrigerant piping .....................19 5.1 General notes before performing piping work ..........20 5.2 R32 Refrigerant circuit ..................20 5.2.1 General notes R32 refrigerant ...............20 5.2.2 Refrigerant piping ..................21 5.2.3 Refrigerant charge .................23 5.2.3.1 Refrigerant charge amount ............23...
  • Page 8 6. Electrical and control settings ..................33 6.1 General check ....................34 6.2 Electrical connection ..................35 6.2.1 Wiring size .....................35 6.2.2 Minimum requirements of the protection devices ......37 6.3 Setting of DIP switches and RSW switches ............38 6.3.2.1 Location of DIP switches and rotary switches ......38 6.3.2.2 Function of DIP switches and rotary switches ......38 6.3.2.3 LED indication ................42 6.4 Terminal board connections ................43...
  • Page 9 8.2 Preliminary check ....................61 8.2.1 Checking the unit ...................61 8.2.2 Electrical checking .................61 8.2.3  Hydraulic circuit checking (space heating and DHW) ......62 8.2.4 Checking the refrigerant circuit .............63 8.3 Commissioning procedure ................63 8.4 Test run / air purge ..................64 9. ERP Data ........................66 9.1 AVERAGE climate .....................67 9.2 WARMER climate .....................68 9.3 COLDER climate ....................68 9.4 Additional data ....................69...

  • Page 10: General Information

    General information 1.1 General information ..................2 1.1.1 General notes ..................2 1.2 Applied symbols....................3 1.3 Additional information about safety ..............4 1.4 Important notice ....................5 1.5 Product guide ....................6 1.5.1 Classification of the units ................6 1.5.1.1 Split system - Indoor unit - YUTAKI S Combi ........6 1.5.2 Product list ....................7 1.5.2.1 Split system - Indoor unit - YUTAKI S Combi ........7 PMEN0645 rev.0 - 04/2023...

  • Page 11: General Information

    General information 1.1.1 General notes © Copyright 2023 Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. – All rights reserved. No part of this publication may be reproduced, copied, filed or transmitted in any shape or form without the permission of Johnson Controls-Hitachi Air Conditioning Spain, S.A.U.

  • Page 12: Applied Symbols

    Applied symbols During normal heat pump system design work or unit installation, greater attention must be paid in certain situations requiring particular care in order to avoid damage the unit, the installation or the building or property. Situations endangering the safety of those in the surrounding area or to the unit itself are clearly indicated in this manual.

  • Page 13: Additional Information About Safety

    Additional information about safety DANGER • DO NOT CONNECT THE POWER SUPPLY TO THE INDOOR UNIT PRIOR TO FILLING THE SPACE HEATING CIRCUIT (AND DHW CIRCUIT IF IT WAS THE CASE) WITH WATER AND CHECKING WATER PRESSURE AND THE TOTAL ABSENCE OF ANY WATER LEAKAGE. •...

  • Page 14: Important Notice

    If this is not the case, contact your distributor. • Hitachi pursues a policy of continuous improvement in product design and performance. The right is therefore reserved to vary specifications without notice.

  • Page 15: Product Guide

    Product guide 1.5.1 Classification of the units 1.5.1.1 Split system - Indoor unit - YUTAKI S Combi Unit type: YUTAKI S Combi (Split system - Dual water module (Indoor unit + Domestic hot water tank) - Medium/Low temperature) Position-separating hyphen (fixed) Compressor power of the Combined outdoor unit (HP): 1.5, 2.0, 2.5, 3.0 R: R32 refrigerant Water-to-water DHW heat exchanger 2: series...

  • Page 16: Product List

    1.5.2 Product list 1.5.2.1 Split system - Indoor unit - YUTAKI S Combi NOTE Icons between brackets means possible extra operations to the factory-supplied operations. For cooling operation, refer to the Cooling kit accessory for YUTAKI S Combi units. Standard model ( ) ( ) ( ) ~ 230V 50Hz 3N~ 400V 50Hz RWD-1.5RW2E-220S...
  • Page 17 Model for UK market ( ) ( ) ~ 230V 50Hz 3N~ 400V 50Hz RWD-1.5RW2E-220S-K RWD-1.5RW2E-220S-K RWD-2.0RW2E-220S-K RWD-2.0RW2E-220S-K RWD-2.5RW2E-220S-K RWD-2.5RW2E-220S-K RWD-3.0RW2E-220S-K RWD-3.0RW2E-220S-K Nordic models ( ) ( ) ~ 230V 50Hz 3N~ 400V 50Hz RWD-2.0RW2E-220S-6H RWD-2.0RW2E-220S-6H RWD-2.5RW2E-220S-6H RWD-2.5RW2E-220S-6H RWD-3.0RW2E-220S-6H RWD-3.0RW2E-220S-6H NOTE Icons between brackets means possible extra operations to the factory-supplied operations.

  • Page 18: Name Of Parts And Dimensional Data

    Name of parts and Dimensional data 2.1 YUTAKI S Combi - RWD-(1.5-3.0)RW2E-220S(-K/6H) ........10 PMEN0645 rev.0 - 04/2023...

  • Page 19: Yutaki S Combi - Rwd-(1.5-3.0)Rw2E-220S(-K/6H)

    YUTAKI S Combi - RWD-(1.5-3.0)RW2E-220S(-K/6H) Plate heat exchanger Water pump Electric water heater Expansion vessel 6L Water strainer Air purger (x2) Water pressure sensor View from A Safety valve Drain pipe for safety valve Refrigerant strainer (x2) Front view Expansion valve 3-way valve (for space heating and DHW) Electrical box Side view...

  • Page 20: Electrical Data

    Electrical data 3.1 Considerations ....................12 3.2 Split system - Indoor unit - YUTAKI S Combi .............13 3.2.1 RWD-(1.5-3.0)RW2E-220S(-K) ...............13 3.2.2 RWD-(2.0-3.0)RW2E-220S(-6H) ............14 PMEN0645 rev.0 - 04/2023...

  • Page 21: Considerations

    » Unit capacity: 100% at maximum operating conditions. • The power supply cables must be sized to cover this maximum current value. • Specifications in these tables are subject to change without notice in order that Hitachi may bring the latest innovations to their customers.

  • Page 22: Split System - Indoor Unit - Yutaki S Combi

    Split system - Indoor unit - YUTAKI S Combi 3.2.1 RWD-(1.5-3.0)RW2E-220S(-K) Applicable voltage Model Power supply Operation mode U max. U min. (kW) (kW) Without electric heater 0.53 0.06 0.63 0.06 With electric heater 13.65 3.06 13.67 3.06 ~ 230V 50Hz With DHW tank heater 12.56 2.81...

  • Page 23: Rwd-(2.0-3.0)Rw2E-220S(-6H)

    3.2.2 RWD-(2.0-3.0)RW2E-220S(-6H) Applicable voltage Model Power supply Operation mode U max. U min. (kW) (kW) Without electric heater 0.53 0.06 0.63 0.06 With electric heater 26.69 6.06 26.72 6.06 ~ 230V 50Hz With DHW tank heater 12.56 2.81 12.59 2.81 With electric and DHW tank heaters 38.65 8.81 38.67...

  • Page 24: Working Range

    Working range 4.1 Power supply working range ................16 4.2 R32 Temperature working range ..............16 4.2.1 Space heating ..................16 4.2.2 DHW .......................17 4.2.3 Swimming pool heating .................17 4.2.4 Space cooling (Necessary cooling kit) ...........17 4.3 R32 Hydraulic working range ................18 4.3.1 Hydraulic data ..................18 4.3.2 Pump performance curves ..............18 PMEN0645 rev.0 - 04/2023...

  • Page 25: Power Supply Working Range

    Power supply working range    Nominal power supply ◆ • Single phase: ~ 230V 50Hz • Three phase: 3N~ 400V 50Hz    Operating voltage ◆ Between 90 and 110% of the nominal voltage.    Voltage imbalance for nominal power supply 3N~ 400V 50Hz ◆...

  • Page 26: Dhw

    4.2.2 DHW Continuous working range Tank heater only Ambient temperature (°C) NOTE In case of heating up the DHW tank with an outdoor ambient temperature lower than -5 °C and without using the DHW electrical heater, the setting temperature will change automatically in order to not exceed the maximum value in the specified continuous working range.

  • Page 27: R32 Hydraulic Working Range

    R32 Hydraulic working range 4.3.1 Hydraulic data MODEL 1.5HP 2.0 HP 2.5 HP 3.0 HP Minimum water flow rate (*1) Maximum water flow rate (*1) Minimum installation water volume (*2) Minimum allowable water pressure Maximum allowable water pressure (*1): Values calculated based on the following conditions: Water inlet/outlet temperature: 30/35°C, Outdoor ambient temperature: (DB/WB): 7/6°C.

  • Page 28: Refrigerant Piping

    Refrigerant piping 5.1 General notes before performing piping work ..........20 5.2 R32 Refrigerant circuit ..................20 5.2.1 General notes R32 refrigerant ...............20 5.2.2 Refrigerant piping ..................21 5.2.3 Refrigerant charge .................23 5.2.3.1 Refrigerant charge amount ............23 5.2.3.2 Refrigerant charge before shipment (W (kg)) ......23 5.3 Water piping ....................23 5.3.1 Water piping size ...................23 5.3.2 Water quality for primary (space heating / cooling) and secondary (DHW) circuit..................24...

  • Page 29: General Notes Before Performing Piping Work

    General notes before performing piping work • Prepare locally-supplied copper pipes. • Select the piping size with the correct thickness and correct material able to withstand sufficient pressure. • Select 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.

  • Page 30: Refrigerant Piping

    5.2.2 Refrigerant piping    Refrigerant piping length between indoor unit and outdoor unit ◆ The unit installation and refrigerant piping should comply with the relevant local and national regulations for the designed refrigerant. Due to R32 refrigerant and depending on final refrigerant charge amount, a minimum floor area for installation must be considered.
  • Page 31 In case of increasing more than 30m (for 2.5HP and 3HP) a minimum floor area requirement must be considered. 1.5HP 2.5HP Factory Charge Charge-less piping length Additional Charge needed Maximum piping Maximum total refrigerant charge No requirement Minimum area Minimum room area requirement (Amin) is needed is required Minimum piping length between outdoor unit and indoor unit (Lmin)

  • Page 32: Refrigerant Charge

    Pipe adapter Model Gas pipe Liquid pipe 1.5HP 2.5HP Ø12.7→Ø15.88 (x2) Ø6.35→Ø9.52 (x2) 3.0HP Ø12.7→Ø15.88 (x2) Ø6.35→Ø9.52 (x2) 5.2.3 Refrigerant charge 5.2.3.1 Refrigerant charge amount The R32 refrigerant is factory charged in the outdoor unit with a refrigerant charge amount for 10 m of piping length between outdoor and indoor unit.

  • Page 33: Water Quality For Primary (Space Heating / Cooling) And Secondary

    Using filling water that does not meet the stated quality requirements can cause a considerably reduce in service life. The responsibility will be out of Hitachi warranties. The following water quality minimum requirement:...

  • Page 34: Water Filling

    As DHW Tank water is being used for storing drinking water, this water has to be in accordance with national regulations and Hitachi’s quality minimum requirements. The use of softeners, active anodes or others protective systems will not bring a derogation from Hitachi’s provided warranty. 5.3.2.1 Water filling ◆...
  • Page 35 6 Remove as much air from inside the water circuit as possible through the indoor air purger and other air vents in the installation (fan coils, radiators...). 7 Start the air purge procedure test. There are two modes (Manual or Automatic) which helps in case of installations with heating and DHW operation: a.
  • Page 36 ◆    Domestic hot water tank If a domestic hot water tank has been installed, perform the following operations: Heating coil circuit Fill the DHW tank heating coil from the space heating circuit filling in point. Follow the instructions explained in the “5.3.2.1 Water filling”...

  • Page 37: Requirements And Recommendations For The Hydraulic Circuit

    5.3.3 Requirements and recommendations for the hydraulic circuit • The maximum piping length depends on the maximum pressure availability in the water outlet pipe. Please check the pump curves. • The indoor unit is equipped with an air purger (factory supplied) at the highest location of the Indoor Unit.

  • Page 38: Water Flow Control

    • The internal air pressure of the expansion vessel tank will be adapted to the water volume of the final installation (factory supplied with 0.1 MPa of internal air pressure). • Do not add any type of glycol to the water circuit. •...

  • Page 39: Additional Hydraulic Necessary Elements For Dhw

    The following hydraulic elements are necessary to correctly perform the space heating water circuit: • Two shut-down valves (factory supplied accessory) (3) must be installed in the indoor unit. One at the water inlet connection (1) and the other at the water outlet connection (2) in order to make easier any maintenance work.

  • Page 40: Additional Hydraulic Optional Elements (For Dhw)

    • 1 Recirculation water pump (field supplied): this water pump (4) will help to correctly recirculate the hot water to the DHW water inlet. • 1 Water check valve (ATW-WCV-01 accessory): this Hitachi accessory (3) is connected after the recirculation water pump (4) in order to ensure the non-return of water.

  • Page 41: Additional Hydraulic Necessary Elements For Dhw

    5.4.4.4  Additional hydraulic necessary elements for DHW (only for UK market) DHW TANK Nature Part name T&P relief valve outlet pipe Ø15 (factory supplied) Piping connections Tundish outlet pipe (Field supplied) Pressure and Temperature relief valve Accessories (Factory supplied) Tundish (Field supplied) Field supplied Drain (Field supplied) The following accessories are necessary for the compliance of the YUTAKI S Combi for UK market...

  • Page 42: Electrical And Control Settings

    Electrical and control settings 6.1 General check ....................34 6.2 Electrical connection ..................35 6.2.1 Wiring size .....................35 6.2.2 Minimum requirements of the protection devices ......37 6.3 Setting of DIP switches and RSW switches ............38 6.3.2.1 Location of DIP switches and rotary switches ......38 6.3.2.2 Function of DIP switches and rotary switches ......38 6.3.2.3 LED indication ................42 6.4 Terminal board connections ................43 6.4.1 Table board 1 ..................43 6.4.2 Table board 2 ..................44 6.4.2.1  I ndoor/outdoor communication wiring (TB2) / ATW-RTU Communication / Central Devices Communication ....44 6.4.2.2 Summary of terminal board connections ........45 6.4.2.3 Input terminals (Default input functions) ........47 PMEN0645 rev.0 - 04/2023...

  • Page 43: General Check

    General check • Make sure that the following conditions related to power supply installation are satisfied: ✓ The power capacity of the electrical installation is large enough to support the power demand of the YUTAKI system (outdoor unit + indoor unit + DHW tank (if apply)). ✓...

  • Page 44: Electrical Connection

    • Check to ensure that existing installation (main power switches, circuit breakers, wires, connectors and wire terminals) already complies with the national and local regulations. • The use of the DHW tank heater is disabled as factory setting. If it is desired to enable the DHW tank heater operation during normal indoor unit operation, adjust the DSW4 pin 3 of the PCB1 to the ON position and use the adequate protections.
  • Page 45 Actuator Maximum Power supply cables Transmitting cables Model Power supply Operation mode current cables EN 60335‑1 EN 60335‑1 Without electric heaters 2 x 0.75 mm + GND With electric heater 26.7 2 x 6 mm + GND ~ 230V 50Hz With DHW tank heater 12.6 2 x 2.5 mm...

  • Page 46: Minimum Requirements Of The Protection Devices

    6.2.2 Minimum requirements of the protection devices CAUTION • Ensure specifically that there is an Earth Leakage Breaker (ELB) installed for the units (outdoor and indoor unit). • If the installation is already equipped with an Earth Leakage Breaker (ELB), ensure that its rated current is large enough to hold the current of the units (outdoor and indoor unit).

  • Page 47: Setting Of Dip Switches And Rsw Switches

    Setting of DIP switches and RSW switches 6.3.2.1 Location of DIP switches and rotary switches 6.3.2.2 Function of DIP switches and rotary switches NOTE • The mark “” indicates the dip switches positions. • No mark “” indicates pin position is not affected. •...
  • Page 48 ◆    DSW1: Additional setting 0 Factory setting. No setting is required. DSW1 YUTAKI S Combi (*) NOTE (*): In case of installing the “Cooling kit” accessory, set the pin 4 of DSW1 to ON in order to enable the cooling operation. ◆...
  • Page 49 DSW4 Unit and installation pipes antifreeze protection Standard / ECO water pump operation Electric heater or boiler emergency mode DHW tank’s heater operation DHW 3‑way valve forced ON CAUTION • Never turn all DSW4 dip switch pins ON. If this happens, the software of the unit will be removed.
  • Page 50 ◆    DSW6 (only if available): Not used DSW6 Factory setting (Do not change) ◆    DSW7: Additional setting 4 DSW7 Factory setting Compatibility with ATW‑RTU‑04 (When cooling mode operation is needed)    DSW15 & RSW2: Refrigerant cycle address ◆ DSW15 &...

  • Page 51: Led Indication

    ◆    DSW18: Not used DSW18 Factory setting (Do not change) For Nordic models RWD‑(1.5‑3.0)RW2E‑220S‑6H: DSW18#1 ON ◆    SSW1: Remote/Local SSW1 Remote Factory setting Remote operation Local Remote Local operation Local ◆    SSW2: Heat/Cool (when SSW1 is in local setting) SSW2 Heat Factory setting...

  • Page 52: Terminal Board Connections

    Terminal board connections 6.4.1 Table board 1    Main power supply ◆ The main power supply connection is wired to the Terminal board (TB1) as follows: Outdoor unit RAS‑WHVRP2E Operating Line (Twisted shielded pair cable or shielded pair cable) Earth DC5V (Non‑Pole Transmission, H‑LINK system) YUTAKI S Combi Earth...

  • Page 53: Indoor/Outdoor Communication Wiring (Tb2) / Atw-Rtu Communication / Central Devices Communication

    6.4.2 Table board 2 6.4.2.1  Indoor/outdoor communication wiring (TB2) / ATW-RTU Communication / Central Devices Communication • The transmission is wired to terminals 1‑2. • The H‑LINK II wiring system requires only two transmission cables that connect the indoor unit and the outdoor unit in case of split system and also connect the indoor unit with ATW‑RTU or Central devices like ATW‑TAG‑02, ATW‑KNX‑02 and ATW‑MBS‑02.

  • Page 54: Summary Of Terminal Board Connections

    6.4.2.2 Summary of terminal board connections Mark Part name Description TERMINAL BOARD 1 (TB1) ~ 230V 50Hz 3N~ 400V 50Hz Main power supply connection ‑ TERMINAL BOARD 2 (TB2) The H‑LINK transmission has to be done between the indoor unit and H‑LINK commutation the terminals 1‑2 of either outdoor unit, ATW‑RTU or any other central device.
  • Page 55 Mark Part name Description Input 4 (Solar) (*) Available input for Solar combination with Domestic Hot Water Tank. For the connection of an external tariff switch device to switch OFF the heat pump during peak electricity demand period. Depending on the Input 5 (Smart function) (*) setting, the heat pump or DHWT will be blocked when signal is open/ closed.

  • Page 56: Input Terminals (Default Input Functions)

    6.4.2.3 Input terminals (Default input functions)    Room thermostat communication cables ◆ There are two different room thermostat types as accessory Optional wireless intelligent room thermostat (TB2) ATW-RTU Only for wireless room thermostat accessory: the receiver is connected to the polarity‑free terminals 1 and 2.
  • Page 57 ◆    Water outlet thermistor for circuit 2 (T When the installation is configured with a second circuit the thermistor for the water outlet temperature have to be connected between terminals 6 and 7 of the terminal board 2. Circuit 2   ...
  • Page 58 NOTE • If wireless intelligent thermostat is selected, optional ON/OFF thermostat has no effect. • Set the configuration in the user’s control. • In case of setting an installation with 2 circuits (Circuit 1 and Circuit 2) and a different Demand ON/OFF is used for each of them, please refer to “6.4.2.2 Summary of terminal board connections”...
  • Page 59 ◆    Smart tariff (Default for input 5) This function can be used to block or limit the heat pump. It allows an external Smart switch device to switch off or limit the heat pump during a period of peak electricity demand. Terminals 16 and 19 of the TB2.
  • Page 60 ◆    Aquastat for circuit 1 Aquastat is a security accessory to control in order to prevent high water temperature entering into floor system (Circuit 1). This devices must be connected to terminals 22 & 23 for circuit 1. When this devices is activated because of the high temperature of the water, it stops the water pump in order to stop the flow of water to the heating floor.
  • Page 61 Electrical Heater DHWT (EH ≤ 3kW CAUTION When using a DHW tank other than those from Hitachi, the maximum connectable heater load is 3 kW (connected to TB2 terminals 30-31). ◆    Output 9 PMEN0645 rev.0 - 04/2023...
  • Page 62 Output terminals (Optional output functions) ◆    3 Way valve for Swimming pool (Default for Output 1) YUTAKI units can be used to heat the water of a swimming pool. The signal is used on a 3‑way motorized diverting valve and to provide control of supply water flow for the swimming pool. This output is available when the function is enabled from the Unit controller.
  • Page 63 ◆    Solar (Default for output 4) This output is used when solar mode is enabled (from Unit controller) and the temperature in the solar panel rises above the water temperature in the domestic hot water tank (DHWT). The connection between terminals 39 and 40 shall be closed in order to activate the dedicated water pump for solar panel combination.

  • Page 64: Maintenance

    Maintenance 7.1 Removing the covers ..................56 7.1.0.1 Removing the indoor unit covers ..........56 7.1.0.2 Removing indoor unit electrical box ........57 7.1.0.3 Space heating pipes connection ..........58 7.1.0.4 DHW pipes connection ............58 7.1.0.5 Drain pipes connection ............59 7.1.1 Test and check ..................59 PMEN0645 rev.0 - 04/2023...
  • Page 65 Removing the covers If it is necessary to access to the indoor unit components, please follow these operations. 7.1.0.1 Removing the indoor unit covers NOTE • Front cover needs to be removed for any task inside the indoor unit. • Back, left and right covers do not need to be removed.   ...
  • Page 66 7.1.0.2 Removing indoor unit electrical box DANGER • Disconnect the unit from the power supply before touching any of the parts in order to avoid an electrical shock. • Do not touch the switch for DHW tank heater operation when handling the electrical box. Keep the position of this switch in factory setting position (“Automatic”...
  • Page 67 7.1.0.3 Space heating pipes connection The unit is factory supplied with two shut-down valves to be connected to the water inlet/outlet pipe. With these shut-down valves it is very practical to connect the indoor unit to the heating system by using the factory supplied gaskets just below the valves (2-3HP: G 1”; 4-6HP: G 1-1/4”). Then, the space heating installation can be carried out.
  • Page 68 7.1.0.5 Drain pipes connection For a correct drainage, connect the drain pipe for the safety valve (located at the top rear side of the unit) to the general draining system. Safety valve P&T relief valve (Only for UK market) NOTE • The safety valve is activated when water pressure reaches 3 bars. •...

  • Page 69: Commissioning

    Commissioning 8.1 Before operation ....................61 8.2 Preliminary check ....................61 8.2.1 Checking the unit ...................61 8.2.2 Electrical checking .................61 8.2.3  H ydraulic circuit checking (space heating and DHW) ......62 8.2.4 Checking the refrigerant circuit .............63 8.3 Commissioning procedure ................63 8.4 Test run / air purge ..................64 PMEN0645 rev.0 - 04/2023...

  • Page 70: Before Operation

    Before operation CAUTION • Supply electrical power to the system for approximately 12 hours before start-up after a long shut-off. Do not start the system immediately after power supply, it may cause compressor failure because the compressor is not well-heated. •...

  • Page 71: Hydraulic Circuit Checking (Space Heating And Dhw)

    • Check to ensure that the switch on the main power source has been ON for more than 12 hours, in order to give the oil heater time to warm the compressor. • In three-phase unit check phase sequence connection on terminal board. •...

  • Page 72: Checking The Refrigerant Circuit

    • As a result, Heating up to 15°C when outdoor temperature is lower than 10°C is performed by the Electrical Heater. NOTE In case of Heater Forced OFF (by optional dip switch setting) these condition is not performed and heating is performed by Heat Pump. Hitachi is not responsible for its operation. PMEN0645 rev.0 - 04/2023...

  • Page 73: Test Run / Air Purge

    CAUTION It is recommended start the unit (first power ON) with heater forced OFF and compressor forced OFF (See “5.4.4.3 Additional hydraulic optional elements (For DHW)”). In order to circulate water by water pump and remove possible air into the heater (Check heater completely filled). Test run / air purge Test run is a working mode used when commissioning the installation.
  • Page 74 Example for PC-ARFH2E In case of test run, user can also select the mode of the test (cooling or heating). When user confirms the test run or the air purge, the YUTAKI user controller sends the order to the indoor. During the execution of this test, the following screen is shown: •...

  • Page 75: Erp Data

    ERP Data 9.1 AVERAGE climate .....................67 9.2 WARMER climate .....................68 9.3 COLDER climate ....................68 9.4 Additional data ....................69 9.5 G eneral ERP data for hot water storage tanks ..........69 PMEN0645 rev.0 - 04/2023...

  • Page 76: Average Climate

    AVERAGE climate 1.5 HP 2.0 HP 2.5 HP 3.0 HP Outdoor unit RAS-1.5WHVRP2E RAS-2WHVRP2E RAS-2.5WHVRP2E RAS-3WHVRP2E Indoor unit RWD-1.5RW2E-220S(-K) RWD-2.0RW2E-220S(-K) RWD-2.5RW2E-220S(-K) RWD-3.0RW2E-220S(-K) Water outlet temperature 35°C 55°C 35°C 55°C 35°C 55°C 35°C 55°C Air to water heat pump Heat pump combination heater Low temperature heat pump Complementary heater Design capacity (P...

  • Page 77: Warmer Climate

    WARMER climate 1.5 HP 2.0 HP 2.5 HP 3.0 HP Outdoor unit RAS-1.5WHVRP2E RAS-2WHVRP2E RAS-2.5WHVRP2E RAS-3WHVRP2E Indoor unit RWD-1.5RW2E-220S(-K) RWD-2.0RW2E-220S(-K) RWD-2.5RW2E-220S(-K) RWD-3.0RW2E-220S(-K) Design capacity (P DESIGN Nominal energy efficiency (η 185 (194) 182 (189) 170 (175) Energy efficiency with OTC control (η ) (*) 187 (196) 184 (191)

  • Page 78: Additional Data

    Additional data 1.5 HP 2.0 HP 2.5 HP 3.0 HP Outdoor unit RAS-1.5WHVRP2E RAS-2WHVRP2E RAS-2.5WHVRP2E RAS-3WHVRP2E Indoor unit RWD-1.5RW2E-220S(-K) RWD-2.0RW2E-220S(-K) RWD-2.5RW2E-220S(-K) RWD-3.0RW2E-220S(-K) Electrical power input in stand-by mode (Psb) 11.9 11.9 11.9 Electrical power input in thermostat-OFF mode (Pto) Electrical power input in OFF mode (Poff) 11.9 11.9 11.9...
  • Page 80 Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. Ronda Shimizu, 1 - Políg. Ind. Can Torrella 08233 Vacarisses (Barcelona) Spain © Copyright 2023 Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. – All rights reserved. PMEN0645 rev.0 - 04/2023 Printed in Spain...

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Rwd-1.5rw2e-220sRwd-2.0rw2e-220sRwd-2.5rw2e-220sRwd-3.0rw2e-220sRwd-1.5rw2e-220s-kRwd-2.0rw2e-220s-k ... Show all

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