UTOPIA RASC-HNE SERIES

UTOPIA RASCHNE SERIES Technical Catalogue Centrifugal Outdoor Units: 5, 10 HP

The specifications in this Manual are subject to change without notice in order that HITACHI may bring the latest innovations to their customers. Whilst every effort is made to ensure that the specifications are correct, printing errors are outside of the control of HITACHI who cannot be held responsible.

Contents C o n t e n t Benefits of RASCHNE outdoor unit General Data Dimensional Data Capacities and selection data Working Range Refrigerant Cycle Diagrams Piping and Refrigerant Charge Electrical data Electrical Wiring Diagrams Electrical Wiring and Configuration Settings Available optional functions Troubleshooting 1 2 3 4 5 6 7 8 9 10 11 12 pag.

Contents Contents 1. Features and benefits of the system...15 1.1. System Description... 16 1.2. Installation Advantages... 18 1.3. Benefits of the mantenience... 19 1.4. Benefits of the functionality... 20 2. General Data...21 2.1. Outdoor Units... 22 2.2. Component data for Outdoor Units... 23 3. Dimensional Data...25 3.1. RASC5HNE... 26 3.2. RASC10HNE... 27 4. Capacities and selection...29 4.1. System Selection Procedure... 30 4.2. Combinability capacity... 36 4.3. Standard Cooling and Heating capacity tables... 36 4.4. Cooling Capacity table... 37 4.5. Heating Capacity table... 37 4.6. Correction Factor... 38 4.7. Fan performance... 39 4.8. Sound Data... 40 5. Working Range...41 5.1. Power Supply... 42 5.2. Temperature Range... 42 6. Refrigerant cycle...43 6.1. Refrigerant cicle of outdoor units RASCHNE... 44 pag. 7

Content. Table of Contents (Cont.) 7. Pipping and refrigerant cycle...47 7.1. Three principles on Refrigerant Piping Work... 48 7.2. Piping Materials... 49 7.3. Suspension on Refrigerant Piping... 50 7.4. Piping connections... 50 7.5. Piping and Refrigerant Charge... 52 7.6. Refrigerant Charging Quantity... 62 8. Electrical Data...65 8.1. Outdoor Units... 66 9. Electrical wiring diagram...67 9.1. Units RASC5/10HNE... 68 9.2. Diagram abbreviations description... 69 10. Electrical wiring and configuration...71 10.1. General checking... 72 10.2. Electrical Wiring Connection for Outdoor Units... 73 10.3. Common Wiring... 75 11. Available optional functions...81 11.1. Available optional functions... 82 12. Troubleshooting...83 12.1. Alarm code indication of remote control switch... 84 12.2. Alarm codes... 84 pag. 8

Contents Units Code List NOTE This Technical Catalogue provides you information about Centrifugal outdoor unit series UtopiaN (R410A). If you need detailed information about indoor units, please refer to Technical Catalogue TCGB0036. For more information about installation, operation and/or mantenience of the unit, please refer to Service Manual SMGB0036. MODELS CODIFICATION List of indoor units, outdoor units and accessories availables in this technical catalogue. INDOOR UNITS System Free 4Way cassette 4WayCassette Mini 2way cassette Ceiling InTheCeiling Unit Indication Code Unit Indication Code Unit Indication Code Unit Indication Code Unit Indication Code RCI1.5FSN1E 7E861619 RCIM 1.5FSN 60277889 RCD1.5FSN 60277814 RPI1.5FSN1E 7E887304 RCI2.0FSN1E 7E861621 RCIM2.0FSN 60277890 RCD2.0FSN 60277815 RPC2.0FSNE 7E872055 RPI2.0FSN1E 7E882024 RCI2.5FSN1E 7E861620 RCD2.5FSN 60277816 RPC 2.5FSNE 7E872030 RPI2.5FSN1E 7E882025 RCI3.0FSN1E 7E871770 RCD3.0FSN 60277817 RPC3.0FSNE 7E872058 RPI3.0FSN1E 7E882031 RCI4.0FSN1E 7E871780 RCD4.0FSN 60277818 RPC4.0FSNE 7E872059 RPI4.0FSN1E 7E882032 RCI5.0FSN1E 7E871790 RCD5.0FSN 60277819 RPC5.0FSNE 7E872060 RPI5.0FSN1E 7E882033 RCI6.0FSN1E 7E871794 RPC6.0FSNE 7E872061 RPI6.0FSN1E 7E882034 RPI 10.0FSNE 70886733 RCI RCIM RCD RPC RPI 1~ Codification description: Unit type: RCI(M) RCD RPC RPI RPK RPF RPF(I) RPI3.0 FSN (1) (E) Series: HLink Setfree/ System Free Capacity (HP): 2.02.53.04.05.06.010.0 Series Refrigerant : R410A E: Made in Europe : Made in Japan pag. 9

Content. FSN(1)(E/M) INDOOR UNITS Wall Wall Mini Floor Floor Concealed Unit Indication Code Unit Indication Code Unit Indication Code Unit Indication Code RPK1.5FSNM 60277825 RPK 1.5FSN1M 60277867 RPF1.5FSNE 7E877716 RPFI1.5FSNE 7E877720 RPK2.0FSNM 60277826 RPF 2.0FSNE 7E877309 RPFI 2.0FSNE 7E877311 RPK2.5FSNM 60277844 RPF2.5FSNE 7E877310 RPFI2.5FSNE 7E877312 RPK3.0FSNM 60277845 RPK3.5FSNM 60277846 RPK4.0FSNM 60277847 RPK RPK (Mini) RPF RPFI 1~ Codification description: RPI3.0 FSN (1) (E) Unit type: RCI(M) RCD RPC RPI RPK RPF RPF(I) Series: HLink Setfree/ System Free Series E: Made in Europe : Made in Japan Capacity (HP): 2.02.53.04.05.06.010.0 Refrigerant : R410A OUTDOOR UNITS Centrifugal UtopiaN (R410A) Unit Indication Code Unit Indication Code RASC5HNE 70974441 New RASC10HNE 70970535 New RASC 3~ Codification description: Outdoor unit type: RASC RASC5HNE E: Made in Europe : Made in Japan Compressor Power (HP): 10 5 Refrigerant : R410A Unit serie: Utopia (Heating/Cooling) pag. 10

Contents Accessory Name COMPLEMENTARY SYSTEMS Indication Code Figure KPI2521 Total heat exchanger 60277481 KPI5021 Total heat exchanger 60277482 KPI8021 Total heat exchanger 60277483 KPI10021 Total heat exchanger 60277484 EF5GE Econofresh Kit 7E774148 ACCESSORIES CODE LIST Accessory Name Indication Code Figure PCP2HTE Remote Control with timer 7E899954 New PCP1HE Remote Control SW 7E799954 PSC5S Central station 60291050 PSC5T Sevenday timer 60291052 PCP5H Optional Remote Controller 60290879 pag. 11

Content. Accessory Name Indication Code Figure PCLH3A Wireless Control Switch 60291056 PCRLH8 Receiver kit (for RCIFSN1E on the panel ) 60291106 PCRLH9 Kit de receptor (for RCD on the panel ) 60291107 PCRLH11 Receiver kit (Receiver Kit for RCI, RCD, RPC, RPI, RPK and RPF(I) on the wall) 60291109 PCRLH13 Receiver kit 60291294 PSC5HR HLINK relay 60291105 PCC 1A Optional Function Connector 60199286 PRC10E1 2PExtension Cord 7E790211 PRC15E1 2PExtension Cord 7E790212 PRC20E1 2PExtension Cord 7E790213 PRC30E1 2PExtension Cord 7E790214 THMR2AE Remote Sensor (THM4) 7E799907 HARCBXE (A) HARCBXE (B) Lonwork BMS Interface (7 inputs up to 6 units) Lonwork BMS Interface (4 inputs up to 32 units) 60290874 60290875 CSNET (HARC40E) CSNET + Interface 6E191922 DBS26 Drain Discharging Boss 60299192 pag. 12

Contents Accessory Name Indication Code Figure PG23WA2 Air Panel for RCI 60291056 PN23WAM Air Panel for RCIM 60197160 PG23DWA1 Air Panel for RCD 60291106 PG46DWA1 Air Panel for RCD 60291109 B23H4 Adopter for deodorant filter 60199790 F23L4K Anti bacteria filter 60199791 F23L4D Deodorant filter 60199793 F46L4D Deodorant filter 60199794 PDF23C3 Duct connection flange 60199795 PDF46C3 Duct connection flange 60199796 OACI232 Fresh air intake kit 60199797 PD75 Fresh air intake kit 60199798 PI23LS5 3 Way outlet parts 60199799 TKCI232 T duct connecting kit 60199801 pag. 13

Content. Accessory Name Indication Code Figure TE56N Tubo distribuidor 70800009 TE10N Tubo distribuidor 70800004 TRE810N Distributor 70800010 QE810N Distributor 70800016 pag. 14

Benefits of the system 1. F e a t u r e s a n d b e n e f i t s o f t h e s y s t e m This chapter describes the features and benefits of the new outdoor unit RASC UtopiaN series of Hitachi, which through its system flexibility and modularity will provide you the complete solution for your building air conditioning requirements. 1 Contents 1. Features and benefits of the system... 15 1.1. System Description...16 1.1.1. General overview...16 1.1.2. Combination flexibility...17 1.2. Installation Advantages...18 1.2.1. Electrical wiring...18 1.3. Benefits of the mantenience...19 1.4. Benefits of the functionality...20 1.4.1. Efficiency...20 pag. 15

Benefits of the system 1.1. System Description Indoor units System Free series To help you quickly discover all the features and benefits of a system with an outdoor unit RASC of Hitachi UtopiaN series, we recommend you to consider of the following points of this chapter. This section provides an overview of the system, the choice of compatible indoor units, a description of the various unit combinations, and details concerning the benefits of the electronic expansion valve that the system uses. RCI1.5~6.0 HP 1.1.1. General overview RCIM1.5~2.0 HP RCD1.5~5.0 HP Hitachi is proud to announce the introduction of the new UTOPIA N series outdoor unit with its combination of SYSTEM FREE indoor units. This combination allows the interconnection of the same indoor units in all the systems. In achieving this Hitachi has effectively started a NEW GENERATION of AIR CONDITIONING. The system provides effortless selection, easy control, logical zoning, and troublefree installation. Through its modularity the system delivers maximum flexibility and consequently offers increased benefits for both customers and installers. RCI2.0~6.0 HP RPI1.5 HP RPI2.0~6.0 HP RASC outdoor units Utopia N (R410A) series. RPI10.0 HP RPK1.5 HP RASC5 HP RASC10 HP RPK1.5~4.0 HP RPF1.5~2.5 HP RPFI1.5~2.5 HP pag. 16

Benefits of the system 1.1.2. Combination flexibility With its modular design the new UTOPIA N series RASC outdoor unit provides a totally flexible air conditioning solution. This offers not only standard cooling functions but, in addition, heating, dry and fan operation for all environments. The system with a RASC outdoor unit UTOPIA N, allows the following combinations: Single or simple Double Triple Quad Single installation example 1 Utopia N (R410A) ~ System Free flexible combinability Twin, Triple and Quad configurations are suitable for large standardshaped room areas. These combinations deliver air conditioning from several units to obtain a smooth and even airflow. This would be very difficult to achieve using a single standard largesized unit. Twin installation example RASC5HNE RPK2.0FSNM Triple with RASC UTOPIA N series outdoor unit RCI 3.0FSN1E Quad with RASC UTOPIA N series outdoor unit pag. 17

Benefits of the system 1.2. Installation Advantages This section details the enhancements that have been made to the new UTOPIA N series outdoor units to simplify their installation. RASC5 HP RASC10 HP Location This unit can be installed in indoor or outdoor locations. Usually is used in some places that is impossible to place the outdoor unit outside the building. Carefree maintenance Easy maintenance access is assured without the need to move or disconnect any of the outdoor units thanks to the conveniently located front access panel. Operational to 8 C The outdoor heat pump temperature, can be safely and effectively operated in external temperatures as low as 8 C. Example of HLINK system: Outdoor unit Outdoor unit 1.2.1. Electrical wiring The electrical control wiring is greatly simplified through the use of the HLINK wiring system. Indoor Unit Indoor Uni Indoor Uni HLink system The HLINK wiring system requires only two transmission wires for connecting each outdoor unit to its indoor units (to control up to 16 refrigerant cycles). Both outdoor units and indoor units require connecting wires in series. Refrigerant piping CSNet Transmission wiring NOTES: When using the H LINK system, the setting of DIP switches is required. If the DIP switches are not set or set incorrectly, an alarm may occur due to transmission failure. Total wiring length for the remote control switch can be extended to up to 5.000m. If total wiring length less than 30m, it is possible to use the normal wiring (0.3mm²). The HLINK system provides maximum flexibility for system design, the installation is easy, and the total costs are reduced. Furthermore, central control is possible by connecting CS NET to HLINK wiring located in the room next to the room where CSNET is installed You can also control of installation by means of the Internet via CSNET WEB Transmission cable: Polarity of Transmission cable: Freely combinable. Freely connection Maximum Outdoor Units Maximum Indoor Units Maximum wiring length: Recommended Cable Voltage: Specifications: 2 Wire NonPolar Wire Connection of the different types of indoor units Connection through indoor unit or outdoot unit 16 Units per HLINK System 128 Units per HLINK System Total 1000m (including CSNET). Shielded twisted pair cable or shielded pair cable, over 0,75 mm² (Equivalent to KPEVS) DC5V pag. 18

Benefits of the system 1.3. Benefits of the mantenience To provide more efficient sevicing and comissioning the systems are equipped with onboard test, trial operation, and selfdiagnosis functions. Test run An automatic test run function is available to aid commissioning using the outdoor unit dip switch or the indoor unit remote control switch. The system is equipped with an identification system that can be used to confirm which series the connected outdoor units are members of (for example: Single or Multi). This is controlled with a remote control switch. An automatic address coding system is also provided which gives a unit number to individual Indoor Units (Indoor Units can also be manually allocated with a unit number using their rotary type dip switches). 1 Trial operation and self diagnosis The new remote control switch provides highly efficient control functions. A new selfdiagnosis function, which enables quick checking of operation conditions in the Indoor Units and Outdoor Unit, has been implemented. Furthermore, alarm data can be stored in the memory of an onboard microcomputer when an abnormality occurs. Remote Control PCPC2HTE Data Memory in the Remote Control Switch If an abnormality occurs, the LCD remote control switch shows an alarm code so that quick diagnosis is available at the site. Optional Functions available through Remote Control Switch Cancellations of a fourdegree shift in the heating mode or the fan speed increasing setting are set via Remote Control Switch. Then, multiple indoor units can be set, at the same time. The configuration can also be easily changed, even after installation is completed. Service Checker A Service Checker to monitor installation conditions and the operational status of air conditioning systems through a desktop or laptoptype computer is available. You can also easily create test run records (A service checker system consists of a special interface unit and a fieldsupplied desktop computer). Alarms reception by means of PCP2HTE pag. 19

Benefits of the system 1.4. Benefits of the functionality 1.4.1. Efficiency RASC outdoor units of Utopia N series of Hitachi, improves the performance and the efficiency respect previous systems. COP: Energy efficiency ratio in heating mode COP NEW EER NEW COP NEW EER NEW EER: Energy efficiency in cooling mode R407C R410A (RASC5) R407C R410A (RASC5) R407C R410A (RASC10) R407C R410A (RASC10) Operation to low temperatures. This system has a wide work range, even in outdoor unit fan control in way of cooling work in operations to ambient temperature drops. Wide range of available static pressure. It is possible an installation with ducts. Duct Duct installation Classic installation pag. 20

General data 2. G e n e r a l d a t a This chapter shows the main data of the outdoor units RASCHNE UtopiaN (R410A) series of Hitachi. For more information about compatible indoor units System Free series, refer to TCGB0036. Contents 2. General Data...21 2.1. Outdoor Units... 22 2.1.1. RASC5/10HNE... 22 2.2. Component data for Outdoor Units... 23 2.2.1. RASC5/10HNE... 23 2 pag. 21

General data 2.1. Outdoor Units 2.1.1. RASC5/10HNE Power Supply. MODEL RASC5HNE RASC10HNE 3N~ 400V 50Hz Nominal Cooling Ccapacity kw 12.50 25.00 Nominal Heating Capacity kw 14.00 28.00 EER: Energy efficiency Cooling mode 2.42 2.57 COP: Coefficient of performance Heating mode 3.01 3.19 Color (RAL code) Soft gray (9002) Sound Pressure Level db(a) 55 60 Height mm 555 640 Outer Dimensions Width mm 1312 2050 Depth mm 835 930 Net weight Kg 175 310 Refrigerant Type R410A Flow Control Restrictor Compressor Hermetic (Scroll) Q ty 1 1 Power kw 3.75 (n.d) Heat exchanger MultiPass CrossFinned Tube Condenser Fan Centrifugal Fan Q ty 1 1 Power W 550 1100 Nominal Air Flow m³/min 58 98 Nominal Static Pressure Pa 50 63 Refrigerant piping connection FlareNut and/or Flange Connection (Factory supplied) Liquid Piping mm(in) Ø9.53 (3/8 ) Ø12.7 (1/2 ) Gas pipe mm(in) Ø15.88 (5/8 ) 25.4 (1 ) Refrigerant Charge Kg 4.8 8.5 Maximum current power consumption A 20 32 Packing Measurement m³ 0.60 1.22 (n.d): Not Available. NOTE: The nominal cooling and heating capacity is the combined capacity of the HITACHI standard split system, and are based on the ISO 5151.. Operation conditions Cooling Heating Water Inlet Temperature Outdoor Air Inlet Temperature DB 27.0 C 20.0 C WB 19.0 C DB 35.0 C 7.0 C WB 6.0 C The Sound Pressure Level is based on following conditions: 3 meters from the unit front surface. Voltage of the power source is 400V. The above data was measured in an anaechoic chamber so that reflected sound should be taken into consideration in the field. Piping Length: 7.5 metres. Piping lift: 0 metres. DB: Dry Bulb WB: Wet Bulb pag. 22

General data 2.2. Component data for Outdoor Units The main components described are the following: Heat exchanger Fan Unit Compressor 2.2.1. RASC5/10HNE Model RASC RASC5HNE RASC10HNE 2 Heat exchanger Fan Unit Compressor Heat Exchanger Type MultiPass CrossFinned Tube Material Cooper Tube Piping Outer Diameter Ø mm 9.53 9.53 Number of Rows 5 5 No. of Tubes/Coil 8e / 4s 12 Fins Material Aluminium Pitch mm 2 2 Maximum Operation Pressure MPa 4.15 4.15 Total Face Area m² 0.52 0.87 Number of Coils/Unit 1 1 Type Centrifugal Fan Number/Unit 1 1 Fan Outer Diameter mm 320 320 Revolutions rpm 950 875 Nominal Air Flow/Fan m 3 /min 58 98 Type DripProof Type Enclosure Starting method Permanent Condenser Motor Nominal Output W 550 1100 Q ty 1 1 Insulation Class B F Model ZP57K3ETFD594 ZP103KCETFD593 Air Tight Pressure Motor Type Oil Discharge MPa 1.62 ~ 4.17 1.62 ~ 4.17 Suction MPa 0.255 ~ 1.08 0.255 ~ 1.08 Starting method Directonline Starting Poles 2 3.25 Insulation Class F F Type 3MAW POE 3MAF POE Q ty l 1.66 3.25 Number of Tubes/Coil e: inputs s: outputs pag. 23

Dimensional Data 3. D i m e n s i o n a l D a t a This chapter shows the main dimensional data of the outdoor units RASCHNE UtopiaN (R410A) series of Hitachi. For more information about compatible indoor units System Free series, refer to TCGB0036. Contents 3. Dimensional Data...25 3.1. RASC5HNE... 26 3.2. RASC10HNE... 27 3 pag. 25

Dimensional Data 3.1. RASC5HNE Service space Nº Description Remarks 1 Air intake 2 Air outlet 3 Service cover 4 Electrical Switch Box 5 Stop Valves protector (*) 6 Holes for wiring connection 7 Drain pipe 8 Holes for fixing unit 9 Refrigerant Liquid Line Flare: Ø9.53 (3/8 ) 10 Refrigerant Gas Line Flare: Ø15.88 (5/8 ) 11 Optional Air Intake 12 Optional Air Oulet 13 Drain Pipe Protector (*) (*) Protector against transportation damages. Remove when install the unit XEKS1057_r0 pag. 26

Dimensional Data 3.2. RASC10HNE 3 Service space Nº Description Remarks 1 Air intake 2 Air outlet 3 Service cover 4 Electrical Switch Box 5 Stop Valves protector (*) 6 Holes for wiring connection 7 Drain pipe 8 Holes for fixing unit 9 Refrigerant Liquid Line Flare: Ø12.7 (1/2 ) 10 Refrigerant Gas Line Flange: Ø25.4 (1 ) 11 Optional Air Intake 12 Optional Air Oulet 13 Drain Pipe Protector (*) (*) Protector against transportation damages. Remove when install the unit XEKS1058_r0 pag. 27

Capacities and selection data 4. C a p a c i t i e s a n d s e l e c t i o n d a t a This chapter is a guide for selecting the most suitable units for your requirements and shows performance details of each outdoor unit RASC UtopiaN (R410A) series of Hitachi Contents 4. Capacities and selection...29 4.1. System Selection Procedure... 30 4.1.1. How to use the data from the chapter... 30 4.1.2. Selection Example For Cooling Load... 31 4.1.3. Selection Example for Heating Load... 34 4.2. Combinability capacity... 36 4.3. Standard Cooling and Heating capacity tables... 36 4.4. Cooling Capacity table... 37 4.5. Heating Capacity table... 37 4 4.6. Correction Factor... 38 4.6.1. Correction Factors Due to Piping Length... 38 4.6.2. Sensible Heat Factor... 39 4.7. Fan performance... 39 4.8. Sound Data... 40 pag. 29

Capacities and selection data 4.1. System Selection Procedure This chapter shows how to select a suitable model for certain requirements. 4.1.1. How to use the data from the chapter When your requirements are defined (load, working temperatures and installation requirements) is necessary to select the most suitable units. To calculate the suitable units use the following information: 1. Combinability. Subchapter 4.2 2. Cooling capacity data. Subchapter 4.4 3. Heating capacity data. Subchapter 4.5 4. Piping length and lift correction factor. Subchapter 4.6. Sensible Heat Factor. Subchapter 4.6.2 6. Noise data Subchapter 4.8 7. Operation Space. Chapter 3 8. General data. Chapter 2 9. Electrical data. Chapter 8 NOTE: If you decide to install an indoor unit duct type, should be consider the fan performance for duct calculation. See subchapter 4.7. The units are designed with three possible static pressure ranges in order to adapt it to all installation necessities. Next examples of selection unit for Cooling Load and Heating Load will use the following units type, selected after consider above indications. pag. 30

Capacities and selection data 4.1.2. Selection Example For Cooling Load In order to show how to select the units characteristics, we define the following requirements: (Follow the following steps). Step 1: System requirements: Cooling load: Total cooling load: 10.5 kw Sensible heat load: 8.5 kw Outdoor Air inlet Dry Bulb temperature: 35 C Indoor Air inlet Dry Bulb Temperature: 26 C Indoor Air inlet Wet Bulb Temperature: 18 C Installation restrictions: Power source: 400V, 3~, 50Hz Outdoor unit under indoor unit: 15.0 metres. Piping Length: 27 meters. Indoor units type: In this case Twin system with an RPK FSNM and RPC FSNE indoor units is required. 4 NOTES: IC:Correction ratio CAP: Performance Capacity IPTue: Outdoor Unit Input power. Step 2: Select outdoor unit capacity performance Preselect an outdoor unit according to required the cooling load at defined temperatures (outdoor air inlet dry Bulb and indoor air inlet wet bulb). Selected unit must have a bigger cooling capacity than the cooling capacity required. Use cooling capacity data from subchapter 4.4. unit CR Indoor air inlet cry bulb (ºC) Indoor air inlet wet bulb (C) / dry bulb (C) 16/23 18/25 CAP IPTo/u CAP IPTo/u RASC5 0,61 10 14,38 3,60 14,80 3,62 15 13,44 3,90 13,93 3,93 21 12,20 4,26 12,90 4,30 25 11,56 4,49 12,18 4,55 30 10,63 4,79 11,30 4,86 35 9,69 5,08 10,43 5,17 40 8,70 5,40 9,65 5,47 Table 1: Cooling capacity data Apply a correction factor according to piping length and lift (subchapter 4.6) to the cooling capacity. System cooling capacity = (cooling capacity x correction factor) 10.43 x 0.9 = 9.38 kw We conclude that the most suitable Outdoor unit for the system requirements is RASC5 pag. 31

Capacities and selection data Step3 3: Indoor unit capacity performance Select the indoor units according to your specific requirements. In this case Twin system using a RPK and RPC unit is required. See combinability from subchapter 4.2 for allowed indoor units. In this case outdoor unit selected (step 1) is a RASC (allows to be combined with RPK3.0FSNM and RPC2.0FSNE indoor units). Once outdoor unit and indoor units have been selected is necessary to adjust the indoor unit nominal capacity to the system. 1. Outdoor unit fix the system cooling capacity. 2. Get, for each indoor unit, the nominal capacity from chapter 2 from TCES0036. 3. Define indoor unit capacity distribution for each unit based on total system indoor unit capacity. 4. To calculate indoor unit capacity apply the indoor unit distribution ratios to the system cooling capacity. Example. Steps Outdoor Units Indoor Units RASC5 RPC2.0FSNE RPK3.0FSNM A Cooling Capacity 9.38 kw B Nominal Capacity 5.00 kw 7.10 kw C Distribution 5,0/(5,0+7,1) = 0.41 7,1/(5,0+7,1) = 0.59 D Unit performance = 9.38 x 0.41 = 9.38 x 0.59 Performance Capacity = 3.84 kw = 5.53 kw SYSTEM CAPACITY 9.38 kw 3.84 kw 5.53 kw Step 4: Sensible heat capacity (SHC) System requirements specify a sensible heat load equal to 8kW. When unit performance capacity is defined is possible to calculate sensible heat capacity for each indoor unit. From subchapter 4.6.2 get Sensible heat factor SHF for high fan speed. Calculate sensible heat corrected factor for all indoor units using the formula: NOTES: SHC:Sensible heat capacity (kw) SCHRPC: Sensible heat capacity indoor unit RPC type (kw) SCHRPK: Sensible heat capacity indoor unit RPK type (kw) SHC = unit performance capacity x SHF SHCRPC = 3.84 x 0.72 = 2.76 kw SHCRPK = 5.53 x 0.72 = 3.98 kw pag. 32

Capacities and selection data Difference between system required indoor air inlet dry bulb temperature (26 C) and cooling capacity data indoor air inlet dry bulb temperature (25 C) makes necessary to adjust the sensible heat corrected for each indoor unit. NOTES: SHC c : Corrected sensible heat capacity (kw) SCH: Sensible heat capacity (kw) IC: Correction ratio (from subchapter 4.4) DB r : Indoor Air Inlet Dry Bulb (ºC) DB: Indoor unit DB temperature (ºC) or interpolated for each WB of the table. Use the following formula: SHCc =SHC + IC x (DBr DB) For the example system: SHCcRPC = 2.76 + 0.61 x (26 25) = 3.37 kw SHCcRPK = 3.98 + 0.61 x (26 25) = 4.59 kw System sensible heat capacity is: SHCc = SHCcRPC + SHCcRPK = 3.37 + 4.59 = 7.96 Step 5: IPT calculation Use cooling capacity data from subchapter 4.4. to get outdoor unit input at required temperatures. 4 NOTES: IC:Correction ratio CAP: Performance Capacity IPT: Input power IPTue: Outdoor unit input power. (Refer to chapter 8 of this catalogue) IPTiu: Indoor unit input power. IPTRPC: Input power of RPC Indoor unit type. (Refer to chapter 6 of TCGB0036 catalogue) IPTRPK: Input power of RPK Indoor unit type. (Refer to chapter 6 of TCGB0036 catalogue) Unidad CR RASC5 0,61 Indoor air inlet cry bulb (ºC) Table 2: Cooling capacity data Indoor air inlet wet bulb (C) / dry bulb (C) 16/23 18/25 CAP IPTo/u CAP IPTo/u 10 14,38 3,60 14,80 3,62 30 10,63 4,79 11,30 4,86 35 9,69 5,08 10,43 5,17 40 8,70 5,40 9,65 5,47 Get indoor unit input from chapter 8 Electrical data. IPT = IPTue + Σ IPTui IPT = IPTue + IPTRPC + IPTRPK = 5.17 + 0.14 + 0.09 = 5.4 Step 6: EER calculation NOTES: EER: Energy efficiency in cooling mode. To calculate EER, use the following formula: EER = Cooling capacity / IPT EER = 9.38 / 5.4 = 1.73 EER = 1.73 pag. 33

Capacities and selection data 4.1.3. Selection Example for Heating Load In order to show how to select system units characteristics, we define the following requirements: Step 1: System requirements Heating load: Total heating load: 11 kw Outdoor Air inlet Wet Bulb Temperature: 0 C Indoor Air inlet Dry Bulb Temperature: 18 C Installation restrictions: Power source: 400 V, 3~, 50 Hz. Outdoor unit under indoor unit: 15.0 metres. Piping Length: 27 metres. Indoor units type: In this case Twin system with an RPK FSNM and RPC FSNE indoor units is required. Step 2: Select outdoor unit capacity performance Preselect an outdoor unit according to required the heating load at defined temperatures (outdoor air inlet and indoor air inlet wet bulb). Selected unit must have a bigger heating capacity than the heating capacity required. Use heating capacity data from subchapter 4.4. NOTES: CAP: Performance Capacity IPT: Input power Unidad RASC5 Outdoor Air Inlet WB (ºC) Indoor air inlet cry bulb (ºC) 16 18 CAP IPTo/u CAP IPTo/u 7 10,30 4,34 10,32 4,44 5 10,83 4,41 10,81 4,51 0 12,15 4,57 12,06 4,68 5 13,47 4,74 13,30 4,86 10 14,78 4,91 14,54 5,03 15 16,10 5,08 15,78 5,20 Table 3: Heating capacity data Apply a correction factor according to piping length and lift (subchapter 4.6) to the heating capacity from table 3. System heating capacity = heating capacity x correction factor = 12.06 x 1.0 = 12.06 kw We conclude that the most suitable Outdoor unit for the system requirements is RASC5. pag. 34

Capacities and selection data Step3 3: Indoor unit performance capacity 1. 2. 3. 4. Select the indoor units according to your specific requirements. In this case Twin system using a RPK and RPC unit is required. See combinability from subchapter 4.2 for allowed indoor units. In this case outdoor unit selected (step 2) is an RAS5HNE (allows to be combined with RPK3.0FSNM and RPC2.0FSNE indoor units). Once outdoor unit and indoor units have been selected, is necessary to adjust the indoor unit nominal capacity to the system. Outdoor unit fix the system heating capacity. Get, for each indoor unit, the nominal capacity from chapter 2 from TCES0036. Define indoor unit capacity distribution for each unit based on total system indoor unit capacity. To calculate indoor unit capacity apply the indoor unit distribution ratios to the system heating capacity. Steps Outdoor unit Indoor unit RASC5HNE RPC2.0FSNE RPK3.0FSNM A Heating capacity 12.06 kw B Nominal Capacity 5.60 kw 8.00 kw C Distribution 5.6/(5.6+8) = 0.41 8/(5.6+8) = 0.59 4 CB Unit performance = 12.06 x 0.41 = 12.06 x 0.59 Performance Capacity = 4.94 kw = 7.11 kw SYSTEM CAPACITY 12.06 kw 4.94 kw 7.11 kw Step 4: IPT calculation Use heating capacity data from subchapter 4.4. to get outdoor unit input at required temperatures. NOTES: CAP: Performance Capacity IPT: Input power IPTue: Outdoor unit input power. (Refer to chapter 8 of this catalogue) IPTiu: Indoor unit input power. IPTRPC: Input power of RPC Indoor unit type. (Refer to chapter 6 of TCGB0036 catalogue) IPTRPK: Input power of RPK Indoor unit type. (Refer to chapter 6 of TCGB0036 catalogue) Unidad RASC5 Outdoor Air Inlet WB (ºC) Table 4: Heating capacity data Indoor air inlet cry bulb (ºC) 16 18 CAP IPT o/u CAP IPT o/u 7 10.30 4.34 10.32 4.44 5 10.83 4.41 10.81 4.51 0 12.15 4.57 12.06 4.68 5 13.47 4.74 13.30 4.86 10 14.78 4.91 14.54 5.03 15 16.10 5.08 15.78 5.20 Get indoor unit input from chapter 8 Electrical data. IPT = IPTue + Σ IPTui IPT = IPTue + IPTRPC + IPTRPK = 4.68 + 0.14 + 0.09 = 4.91 IPT= 4.91 kw NOTES: COP: Coefficient of performance cooling mode Step 5: COP calculation To calculate COP use the following formula: COP = Heating capacity / IPT COP = 12.06 / 4.91 = 2.45 COP = 2.45 pag. 35

Capacities and selection data 4.2. Combinability capacity New UtopiaN series, allows the connection between the different types and horse power Indoor Units with the same Outdoor Units. The differents possible combinations are indicated in the table below Possible units combinations between outdoor units and indoor units Indoor Unit Models NOTE: RPF(I) can not be connected with another unit in twin, triple or quad combination. Outdoor Unit RASC5 RASC10 Combinations RCI1.5 RCD1.5 RPI1.5 RPK1.5 RPF1.5 RPFI1.5 RCI2.0 RCD2.0 RPC2.0 RPI2.0 RPK2.0 RPF2.0 RPFI2.0 RCI2.5 RCD2.5 RPC2.5 RPI2.5 RPK2.5 RPF2.5 RPFI2.5 RCI3.0 RCD3.0 RPC3.0 RPI3.0 RPK3.0 RCI3.5 RPC3.5 RPI3.5 RPK3.5 RCI4.0 RCD4.0 RPC4.0 RPI4.0 RCI5.0 RCD5.0 RPC5.0 RPI5.0 RCI6.0 RPC6.0 RPI6.0 Simple 1 Double RPI10.0 2 1 1 Triple 2 1 Simple 1 Double 2 1 1 Triple 2 1 Quad 4 4.3. Standard Cooling and Heating capacity tables NOTE: For more information about capacities, see Chapter 4.4. Outdoor Unit Type Indoor Unit Cooling Input power Capacity (kw) EER Heating Input power Capacity (kw) COP RCI 5.0FSN1E 5.12 12.50 2.44 4.62 14.00 3.03 RASC5 Cooling+ Heating RPC5.0FSNE 5.22 12.50 2.40 4.71 14.00 2.97 RPI5.0FSN1E 5.31 12.50 2.36 4.79 14.00 2.92 RCD5.0FSN 5.18 12.50 2.41 4.67 14.00 3.00 RPI10.0FSNE 9.77 25.00 2.56 8.83 28.00 3.17 RASC10 Cooling+ Heating RCI5.0FSN1Ex2 9.72 25.00 2.57 8.77 28.00 3.19 RPC5.0FSNEx2 9.87 25.00 2.53 8.95 28.00 3.13 RPI5.0FSN1Ex2 10.04 25.00 2.49 9.09 28.00 3.08 RCD5.0FSNx2 9.81 25.00 2.56 8.87 28.00 3.16 NOTES Defrost factor is included. The nominal cooling and heating capacity is the combined capacity of the HITACHI standard split system, and are based on the ISO13253 for RPI Type and ISO 5151 for the rest of the models. Operation conditions Cooling Heating Indoor air inlet temperature Outdoor air inlet temperature 27 C DB 20 C DB 19 C WB 35 C DB 7 C DB 6 C WB Piping Length: 7.5 metres. DB: Dry Bulb; WB: Wet Bulb pag. 36

Capacities and selection data 4.4. Cooling Capacity table Wet Bulb temperature (ºC) / Indoor air inlet Dry Bulb temperature (ºC) unit CR Indoor air inlet cry bulb (ºC) 16/23 18/25 20/27 22/30 NOTES: IC:Correction ratio IPTUE: Input setting of the outdoor unit. (Refer to data of cahpetr 8 of this catalogue) RASC5HNE 0.61 Capacity IPTo/u Capacity IPTo/u Capacity IPTo/u Capacity IPTo/u 10 14.38 3.60 14.80 3.62 15.29 3.64 16.01 3.66 15 13.44 3.90 13.93 3.93 14.48 3.96 15.33 4.00 21 12.20 4.26 12.90 4.30 13.55 4.34 14.50 4.40 25 11.56 4.49 12.18 4.55 12.85 4.61 13.95 4.67 30 10.63 4.79 11.30 4.86 12.04 4.93 13.26 5.01 35 9.69 5.08 10.43 5.17 12.50 5.12 12.58 5.35 40 8.70 5.40 9.65 5.47 10.55 5.56 11.90 5.70 10 31.35 7.88 32.33 7.83 33.83 7.87 35.83 7.91 RASC10HNE 0.61 15 28.35 8.32 29.45 8.30 30.95 8.36 32.95 8.42 21 24.74 8.83 26.10 8.89 27.45 8.94 29.53 9.03 25 22.35 9.18 23.70 9.22 25.20 9.33 27.20 9.44 30 19.35 9.61 20.82 9.68 22.32 9.82 24.32 9.95 35 16.35 10.05 17.95 10.14 25.00 9.72 21.45 10.46 4 40 13.57 10.50 14.95 10.63 16.40 10.76 18.42 10.95 4.5. Heating Capacity table NOTE: IPTUE: Outdoor Unit Input power. (Refer to data of cahpetr 8 of this catalogue) unit Outdoor Air Inlet Temperature WB ( C) Indoor Air Inlet Temperature WB ( C) 16 18 20 22 24 26 Capacity IPTo/u Capacity IPTo/u Capacity IPTo/u Capacity IPTo/u Capacity IPTo/u Capacity IPTo/u 7 10.30 4.34 10.32 4.44 10.33 4.55 10.35 4.66 10.36 4.76 10.38 4.87 NOTE: Defrost factor is included RASC5HNE RASC10HNE 5 10.83 4.41 10.81 4.51 10.80 4.62 10.65 4.73 10.76 4.83 10.75 4.94 0 12.15 4.57 12.06 4.68 11.96 4.79 11.77 4.90 11.78 5.01 11.68 5.12 5 13.47 4.74 13.30 4.86 13.13 4.97 12.89 5.08 12.79 5.19 12.62 5.30 10 14.78 4.91 14.54 5.03 14.29 5.14 14.01 5.25 13.80 5.37 13.55 5.48 15 16.10 5.08 15.78 5.20 15.46 5.31 15.13 5.43 14.81 5.54 14.49 5.66 7 17.65 8.28 17.63 8.41 17.61 8.54 17.60 8.67 17.59 8.81 17.15 8.96 5 18.90 8.42 18.86 8.56 18.80 8.69 18.77 8.83 18.70 8.97 18.23 9.12 0 22.05 8.77 21.93 8.92 21.78 9.08 21.65 9.23 21.50 9.38 20.90 9.52 5 25.20 9.12 24.99 9.29 24.76 9.46 24.53 9.63 24.30 9.80 23.56 9.92 10 28.35 9.46 28.05 9.65 27.74 9.84 27.41 10.02 27.10 10.21 26.23 10.32 15 31.50 9.82 31.10 10.02 30.70 10.22 30.30 10.42 29.90 10.62 28.89 10.73 pag. 37

Capacities and selection data 4.6. Correction Factor 4.6.1. Correction Factors Due to Piping Length Correction Factor is based on the equivalent piping length in meters (EL) and the vertical distance between Indoor and Outdoor Unit in meters (H). NOTES: EL: Equivalent total distance between Indoor Unit and Outdoor Unit in Meter (Equivalent oneway Piping Length L (m)) In Twin, Triple or Quad installations the longest distance. H: Vertical Distance between Indoor Unit and Outdoor Unit in Meter (m). H Outdoor Unit in sun roof EL H Indoor Unit(s) in floor EL EL EL NOTE: H>0: Position of Outdoor Unit is higher than Position of Indoor Unit (m). H<0: Position of Outdoor Unit is lower than Position of Indoor Unit (m). NOTE: One 90 elbow is equivalent to 0.5m. One 180 bend is equivalent to 1.5m. One distributor branch is the equivalent to 0,5 m For twin, Triple and Quad connection: L= the longest distance. H H Outdoor Unit in basement NOTES: Cooling Capacity Heating capacity TCA: Actual Corrected Cooling Capacity (kw). THA: Actual Corrected Heating Capacity (kw). The cooling capacity should be corrected according to the following formula: The heating capacity should be corrected according to the following formula: PH: Correction Factor based on the Equivalent Piping Length (in %). Capacity (C): Cooling Capacity in the Cooling Capacity Table (kw). Capacity (H): Heating Capacity in the Performance table (kw). TCA = Capacity (C) x F THA = Capacity (H) x F pag. 38

Capacities and selection data 4.6.2. Sensible Heat Factor The sensible heat factor of Indoor Units at each fan speed (Hi, Me, Lo) based on the JIS Standard B8616, is given below: Indoor Unit Models 4.7. Fan performance SHF HI Med Low RCI1.5FSN1E 0,77 0,75 0,73 RCI 2.0FSN1E 0,78 0,76 0,75 RCI2.5FSN1E 0,73 0,71 0,69 RCI 3.0FSN1E 0,79 0,76 0,72 RCI 4.0FSN1E 0,78 0,75 0,72 RCI 5.0FSN1E 0,74 0,70 0,68 RCI 6.0FSN1E 0,73 0,69 0,68 RCD1.5FSN 0,73 0,69 0,66 RCD2.0FSN 0,75 0,67 0,65 RCD2.5FSN 0,74 0,67 0,65 RCD3.0FSN 0,74 0,67 0,65 RCD4.0FSN 0,73 0,67 0,65 RCD5.0FSN 0,69 0,67 0,65 RPC2.0FSNE 0,72 0,70 0,67 RPC2.5FSNE 0,72 0,70 0,67 RPC3.0FSNE 0,72 0,70 0,67 RPC4.0FSNE 0,72 0,70 0,67 RPC5.0FSNE 0,72 0,70 0,67 RPC6.0FSNE 0,72 0,70 0,67 Indoor Unit Models SHF HI Med Low RPK 1.5FSN1M 0,73 0,72 0,70 RPK1.5FSNM 0,73 0,72 0,70 RPK2.0FSNM 0,72 0,72 0,70 RPK2.5FSNM 0,72 0,72 0,70 RPK3.0FSNM 0,72 0,71 0,70 RPK4.0FSNM 0,72 0,71 0,70 RPI1.5FSN1E 0,73 0,69 0,65 RPI2.0FSN1E 0,76 0,75 0,74 RPI2.5FSN1E 0,76 0,74 0,72 RPI3.0FSN1E 0,75 0,71 0,67 RPI4.0FSN1E 0,73 0,71 0,65 RPI50FSN1E 0,72 0,68 0,64 RPI6.0FSN1E 0,72 0,69 0,67 RPF1.5FSNE 0,73 0,69 0,65 RPF2.0FSNE 0,73 0,69 0,65 RPF2.5FSNE 0,73 0,69 0,65 RPFI2.0FSNE 0,73 0,69 0,65 RPFI2.5FSNE 0,73 0,69 0,65 4 NOTE: : Nominal point The outdoor unit can be installed with ducts in outdoor side and indor side. Refer to fan performance curve in order to ensure that the air volume is within the working range. It s assumed that unit will be installed using supply and return air ducts. Find bellow fan performance curve to decide which ducts are suitable. NOTE: When design a duct, check to ensure that the Air volume is within working range as indicate Fan Performance Curve. If the Air volume is set outside working range, watercarry over (drop in the ceiling or into the room), noise increases, fan motor damaged (high temperature), insufficient Cooling/Heating capacity, phenomena can occur. Therefore design ducts and select the correct fan speed in order to keep the unit running in the accepted working range selected. External Static Pressure (mm Aq) RASC5HNE Air Flow (m³/min) External Static Pressure (mm Aq) RASC10HNE Air Flow (m³/min) Specific comments for RASC5HNE model installation: It is recommended to set up ducting work in order to keep static pressure around 10mmAq. If measuring static pressure or airflow is not available, measuring ampers can give and idea of working point. As a reference, at Pst = 0mmAq is 5.4 A, and at Pst = 10mmAq is 4.65 A approximately (only approximated since motor temperature, voltage will affect Amps measurement). If installation requires short and straight ducts (Pst 3mmAq) installation, whistle air sound could appear. In order to avoid this situation it is advisable to close suction air inlet on outdoor unit (half of suction air inlet closed, for example). pag. 39

Capacities and selection data 4.8. Sound Data Model: RASC5HNE Power source: 400V 50Hz Model: RASC10HNE Power source: 400V 50Hz Measurement point: 3 m from the frontal surface of the unit 1.5 meters from floor level Noise Criteria Curve Nominal: 55dB(A) Measurement point: 3 m from the frontal surface of the unit 1.5 meters from floor level Noise Criteria Curve Nominal: 60dB(A) Octave Sound Pressure (db: general scale C) Octave Sound Pressure (db: general scale C) Approximate threshold for continuous noise sensing Approximate threshold for continuous noise sensing Frequency (Hz) Frequency (Hz) pag. 40

Working Range 5. W o r k i n g r a n g e This chapter shows the working range of outdoor units RASC5/10HNE UtopiaN (410A) series of Hitachi. Contents 5. Working Range...41 5.1. Power Supply... 42 5.2. Temperature Range... 42 5 pag. 41

Working Range 5.1. Power Supply. Operating voltage Voltage Imbalance Starting Voltage 90% to 110% of the Rated Voltage Within a 3% Deviation from Each Voltage at the Main Terminal of Outdoor Unit Higher than 85% of the Rated Voltage Following the Council Directive 89/336/EEC and its amendments 92/31/EEC and 93/68/ EEC, relating to electromagnetic compatibility, next table indicates maximum permissible system impedance Z max at the interface point of the user s supply, in accordance with EN61000311 MODEL Z máx (Ω) RASC5HNE 0,19 RASC10HNE 0,12 5.2. Temperature Range The temperature range is indicated in the following table: NOTES: DB: Dry Bulb. WB: Wet Bulb. Water outlet Temperature Outdoor Temperature Cooling Operation Haeting Operation Minimum 21 C DB/15.5 C WB 15 C DB Maximum 32 C DB/22.5 C WB 24 C DB ~ 27 C DB Minimum 5 C DB 8 C WB Maximum 43 C DB 10 C WB ~ 15.5 C WB Temperature Range Diagram: Cooling Operation Haeting Operation 43 15.5 Outdoor Air Temperature ( C DB) 5 15.5 22.5 Outdoor Air Temperature ( C DB) 8 15 27 Indoor Air Inlet Temperature ( C WB) Indoor Air Inlet Temperature ( C WB) pag. 42

Refrigerant Cycle 6. R e f r i g e r a n t c y c l e This chapter shows refrigerant cicle diagrams for outdoor units RASC HNE UtopiaN series of Hitachi. Contents 6. Refrigerant cycle...43 6.1. Refrigerant cicle of outdoor units RASCHNE... 44 6.1.1. RASC5HNE... 44 6.1.2. RASC10HNE... 45 6 pag. 43

Refrigerant Cycle 6.1. Refrigerant cicle of outdoor units RASCHNE 6.1.1. RASC5HNE Diagram marks description: 4.15 MPa R410A Refrigerant Flow for Cooling Refrigerant Flow for Heating FieldSupplied Refrigerant Piping Connection with flare nut Flange Connection Brazing Connection Airtight Test Pressure Refrigerant Refrigerant cicle components description: Nº Description 1 Compressor 2 Indoor Unit heat exchanger 3 Outdoor Heat Exchanger 4 Accumulator 5 Expansion valve 6 Reverse valve 7 Distributor 8 Check Joint 9 Pressure switch high Nº Description 10 Pressure Switch (Gas by Pass) 11 Restrictor 12 Stop Valve (Gas Line) 13 Stop Valve (Liquid Line) 14 Solenoid Valve (Gas Bypass) 15 Capillary Tube (Gas Bypass) 16 Filter 17 Branch pipe pag. 44

Refrigerant Cycle 6.1.2. RASC10HNE 6 Diagram marks description: 4.15 MPa R410A Refrigerant Flow for Cooling Refrigerant Flow for Heating FieldSupplied Refrigerant Piping Connection with flare nut Flange Connection Brazing Connection Airtight Test Pressure Refrigerant Refrigerant cicle components description: Nº Description 1 Compressor 2 Indoor Unit heat exchanger 3 Outdoor Heat Exchanger 4 Accumulator 5 Expansion valve 6 Reverse valve 7 Distributor 8 Check Joint 9 Pressure switch high Nº Description 10 Pressure Switch (Gas by Pass) 11 Restrictor 12 Stop Valve (Gas Line) 13 Stop Valve (Liquid Line) 14 Solenoid Valve (Gas Bypass) 15 Capillary Tube (Gas Bypass) 16 Filter 17 Branch pipe pag. 45

Piping and Refrigerant Charge 7. P i p i n g a n d r e f r i g e r a n t c h a r g e This chapter describes the connections between refrigerant piping, and the way to change the refrigerant charge in the system. Contents 7. Pipping and refrigerant cycle...47 7.1. Three principles on Refrigerant Piping Work... 48 7.2. Piping Materials... 49 7.3. Suspension on Refrigerant Piping... 50 7.4. Piping connections... 50 7.5. Piping and Refrigerant Charge... 52 7.5.1. Refrigerant Piping Length... 52 7.5.2. Refrigerant piping selection... 53 7.5.3. Twin system, Triple system and Quad system installation... 54 7.5.4. Distributors... 56 7.5.5. Brazer... 57 7.5.6. Flushing Refrigerant Pipes... 58 7.5.7. Air Tight Presure Test... 59 7.5.8. Vacuum Drying... 60 7.5.9. Refrigerant charge procedure... 61 7.6. Refrigerant Charging Quantity... 62 7.6.1. Additional Refrigerant Charge Calculation for Liquid Piping (W1 Kg)... 62 7 pag. 47

Piping and Refrigerant Charge 7.1. Three principles on Refrigerant Piping Work When refrigeratan cycle is perfirmes with R410A, refrigeration oil should be of synthetic type. Therefore, the oil absorbs moisture quickly when compared with previous systems and it will cause sludge and oxidation of the oil. Due to this reason, pay much careful attention to basic piping work control to avoid infiltration of moisture or dusts during refrigerant piping work. Three Principles Cause of failure Presumable Failure Preventive Action 1. Dry Keep good dryness Water Infiltration due to insufficient protection at pipe ends. Dewing inside of Pipes Insufficient Vacuum Pumping Time Icing Inside Tube at Ex. Valve (Water Choking) + Generation of Hydration and Oxidation of Oil Clogged Strainer, etc., Insulation Failure and Compressor Failure Protection of Pipes Flushing Vacuum Drying 1 Pinching 2 Taping One gram of water turns into gas (approx. 1000 lrs) at 1 Torr. Therefore, it takes long time to vacuumpump by a small vacuum pump 2. Clean Infiltration of Dusts, etc. from Tube No dusts Inside of Pipes Ends Oxidation Film during Brazing without Blowing Nitrogen Insufficient Flushing by Nitrogen after Brazing Clogging of Ex.valve, capillary tube and filter Oxidation of oil Failure of Compressor Insufficient Cooling or Heating Compressor Failure Protection of Pipes Flushing 1 Mounting Caps 2 Taping 3 Pinching 3. No leakage No leakage shall exist Brazing Failure Failed Flaring Work and Insufficient Torque of Squeezing Flare Insufficient Torque of Squeezing Flanges Refrigerant composition change, refrigerant shortage Performance decrease Oxidation of oil Overheating od compressor Insufficient Cooling or Heating Compressor Failure Careful Basic Brazing Work Basic Flaring Work Basic Flange Connecting Work Air Tight Presure Test Holding of Vacuum ATTENTION: It is recomended to use drier filter for more safety. The filter will absorb the remaining moisture inside refrigerant cycle after finish all vacuum process indicated in this chapter. Install the field supplied filter drier in the liquid line. pag. 48

Piping and Refrigerant Charge 7.2. Piping Materials 1. Prepare locallysupplied copper pipes. 2. Select the piping size with the correct thickness and correct material which can have sufficient pressure strength. 3. 4. Select clean copper pipes. Make sure there is not dust and moisture inside. Blow the inside of the pipes with oxygen free nitrogen to remove any dust and foreign materials before connecting pipes. After connecting the refrigerant piping, seal the open space between Knockout hole and refrigerant pipes by using insulation material as shown bellow: Unit side Insulator FieldSupplied Refrigerantion Pipe Insulator Insulator NOTE: 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 all copper piping is clean and dry internally. CAUTION: Cap the end of the pipe when the pipe is to be inserted through a hole. Do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe 7 If piping installation is not completed until next day or over a longer period of time, braze off the ends of the piping and charge with oxygen free nitrogen through a Schrader valve type access fitting to prevent moisture and particle contamination. Do not use insulation material that contents NH3 because can damage cooper pipe material and can be a source of future leakage. Completely insulate both refrigerant gas piping and liquid piping between the indoor units and the outdoor unit. If not insulated, dew will ocur on the piping surface pag. 49

Piping and Refrigerant Charge 7.3. Suspension on Refrigerant Piping Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching the weak part of the building such as wall, ceiling, etc. (If touched, abnormal sound may occur due to the vibration of the piping. Pay special attention in case of short piping length). 1~15m FireProof Section Treatment Indoor unit Do not fix the refrigerant piping directly with the metal fittings (The refrigerant piping may expand and contract). Some examples for suspension method are shown below. For suspending heavies For Piping Along The Wall For Instant Installation Work 7.4. Piping connections Refrigerant piping (that connects outdoor unit to indoor unit), connect indoor unit to outdoor unit with stop valves. Stop valves: 1. Stop valves are located on the back external side of the unit. Before refrigerant piping connection work, is necessary remove the stop valves protector cover. Gas Valve Liquid Valve Connection with flare nuts Connection with flare nuts Flange connextion pag. 50

Piping and Refrigerant Charge 2. If the fieldsupplied piping is connected with stop valves directly, it is recommended to use a tube bender. 3. For gas pipe connection use the factory supplied Flange Pipe. (only RASC10HNE). Ø25.4 ID (1") 95 27 85 Tightening torque and stop valves size Operation of stop valve should be performed according to the next figure: (Fig.A) Check Joint (Only the Charging hose can be connected) Refrigerant Pressure Plug Tighten the cap with a torque of (C) Closed before shipment Spindle Valve Counterclockwise Open Clockwise Close Hex1 (To open and close spindle valve) Plug Tighten the cap with a torque of (B) (Put after work Hex1 (To open or close the Spindle valve) Refrigerant Pressure ORing (rubber) (Fig.B) 7 Seat Surface (Fully closed position) Flare Tighten the cap with a torque of (A) ORing (rubber) FieldSupplied Refrigerantion Pipe Plug Tighten the cap with a torque of (B) Spindle Valve Counterclockwise Open Clockwise Close Closed before shipment Check Joint (Only the charging hose can be connected). Tighten the cap with a torque of (C) Flange Tight the flange bolts with a tightening torque of (A) Refrigeration Piping (FieldSupplied) Valve Pipe connection Size Hexegonal key (Allen) (Hex1) Tighten torque (N.m) A B C Liquid Gas 5 HP Fig A 9.53 (3/8 ) 4 mm 33~42 30 9.8 10HP Fig A 12.7 (1/2 ) 4 mm 60 40 9.8 5 HP Fig A 15.88 (5/8 ) 4 mm 33~42 14~18 9.8 10HP Fig B 25.4 (1 ) 10 mm 53~75 (*) 49 9.8 NOTE: (*) Flange Connection. Tightening torque for flange bolts. CAUTION: Do not apply force to the spindle valve at the end of opening (5 N.m or smaller). The back seat construction is not provided. During the test run, fully open the spindle. If not fully opened, the devices will be damaged. pag. 51

Piping and Refrigerant Charge 7.5. Piping and Refrigerant Charge 7.5.1. 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 dark area of the chart, which is showing the applicable height difference according to piping length. Design piping installation diagram. H(m) 30 20 10 RASC5 H(m) 30 20 10 RASC10 0 10 0 10 20 0 10 20 30 40 50 L(m) 20 0 10 20 30 L(m) Simple installation: L H L NOTE: L= Piping length. H Twin installation: A B C H H A C B NOTE: L= C + the distance between distributor and the furthest indoor unit (distance A or B) Triple installation: H A B D C H A B C D NOTE: L= C + the distance between distributor and the furthest indoor unit (distance A, B or D) Quad installation: A H B D E C H A B C D E NOTE: L= C + the distance between distributor and the furthest indoor unit (distance A, B, D or E) pag. 52

Piping and Refrigerant Charge Maximum piping length according to the unit: Maximum Piping Length Unit Piping Actual Piping Length: Equivalent Piping Length: RASC5 L 50 m 70 m RASC10 30 m 45 m NOTE: L= Piping length. NOTE: Install the distribuor at the location where piping length form indoor units to distributor will be the same. How ever, if this is not possible due to building construction, the length difference between two pipe should be as indicate in above table. Maximum piping length difference between indoor units pipes to distributor System Piping Piping Length Double A and B 8 m Triple A, B and D 6 m Quad A, B, D and E 4 m 7.5.2. Refrigerant piping selection Select the piping size according to the system, and following the next procedure: Simple system: The piping size must be the same as outdoor unit pipe connection. 7 NOTE: If you have an outdoor unit RASC10 and wants to perform a simple installation, please check the indoor unit piping size connection. If the indoor unit manufacture is before of Mar 07, a pipe reduced will be necessary to perform this connection. Multiple installations: 1. Piping size, between outdoor unit and distributor: The piping size to select, must be the same as outdoor unit pipe connection. 2. Piping size, between distributor and distributor and indoor unit: The piping size to select, must be the same as indoor unit pipe connection. unit Gas Piping Size Piping Size for Liquid Line Distributor Twin system Triple system Quad System RASC5 15,88 (5/8 ) 9,53 (3/8 ) TE56N RASC10 25,4 (1 ) 12,7 (1/2 ) TE10N TRE810N QE810N pag. 53

Piping and Refrigerant Charge 7.5.3. Twin system, Triple system and Quad system installation When multiple system is performed, it is necessary to keep in mind the following aspects: Height difference between indoor units and distributor. Install all indoor units at the same height. When the height difference between the indoor units due to building construction is necessary, this should be less than 0.5 meters. Install the branch pipe at the same height of indoor units or lower, but never higher. Example. twin system Height Difference Between Two Indoors. Smaller than 0.5m Indoor Units Branch pipe Smaller than 0.5mm Installing Distributor 1. Install the Distributor supplied by HITACHI on request It is not possible perform a T connection instead of a Branch Pipe. Example. Twin system. 2. Installing the Distributor. Fix the Branch Pipe horizontally to the pillar, wall or ceiling. Piping must not be fixed rigidly to the wall as thermal expansion and contraction can cause pipe fracture. Example. Twin system. Horizontal To Indoor Unit Horizontal To Indoor Unit Vertical Horizontal To Outoor Unit Fixing the Branch Pipe to the surface of Pillar or Wall. Fixing the Branch pipe to Ceiling Surface or Beam NOTE: Fix the piping from outside of insulation or inserting absorber between the pipe and a fixing metal. pag. 54

Piping and Refrigerant Charge 3. Distributor position. Twin system This is the correct position of twin Branch Pipe: Up Higher than 0.5m Main Piping Refrigerant direction Branch pipe Main Piping Refrigerant direction down This is wrong position. Up Branch pipe Main Piping Main Piping Refrigerant direction Branch pipe Branch pipe down Triple system and Quad: Install the header horizontally 7 Example. Triple Branch pipe Gas pipe Liquid Piping pag. 55

Piping and Refrigerant Charge 7.5.4. Distributors unit system Distributor Gas line Liquid line Quad QE810N RASC10 Triple TRE810N Double TE10N Triple TRE06N RASC5 Double TE56N NOTE: If you have an outdoor unit RASC10 and wants to perform a Twin system with an indoor unit 2.0HP and 3.0HP, will be necessary perform a reduction pipe (Ø9.53 Ø6.5) for indoor unit 2.0HP liquid pipe connection to distributor TE56N. If you have an outdoor unit RASC5 and wants to perform a Triple system, will be necessary to perform a reduction pipe (Ø15,88 Ø12,9) to connect indoor unit 1.5HP gas pipe to the distributor TRE06N. If you have an outdoor unit RASC10 and wants to perform a simple installation, please check the indoor unit piping size connection. If the indoor unit manufacture is before of Mar 07, a pipe reduced will be necessary to perform this connection. pag. 56

Piping and Refrigerant Charge 7.5.5. Tightening Flare Nuts 1. 2. Flaring connections (smaller than a diameter of Ø19.05) are generally used. However, if an incorrect flaring is performed, it will cause serious refrigerant leakage. Shape after Flaring, it should be rectangular and flat, and no uneven thickness, cracks and scratches should exist. Nominal Dia. Pipe diameter Ød Dimension A 1/4 6,35 9 90º±2º 45º±2º 3/8 9,52 13 1/2 12,70 16,20 0.40.8R 5/8 15,88 19,40 3/4 19,05 23,30 d Ø A Ø When tightening the flare nuts, use two spanners, as shown in the figure. The required tightening torque is as follows: 7.5.5. Brazer Pipe size Tighten torque (N m) Ø 6.35 mm 20 Ø 9.53 mm 40 Ø 15.88 mm 80 Ø 19.05 mm 100 7 1. The most important work in the refrigerant piping work is brazing work. If leakage due to careless mistakes hydration generation accidentally occurs, it will cause clogged capillary pipes or serious compressor failure. 2. Pipe Dimensions after expanding. It is important to control the clearance of the pipe fitting portion as shown below. In the case that a cooper tube expansion jig is used, the following dimensions should be secured. Cooper tube size (d2) Ød1 Gap (d1d2) a. Cooper tube size (d2) Ø d1 Gap (d1d2) +0,08 +0,1 0,33 +0,09 +0,1 0,39 a. Ø6.35 Ø6.5 6 Ø22.22 Ø22.42 10 0,08 0 0,07 0,09 0 0,11 +0,08 +0,1 0,35 +0,12 +0,1 0,42 Ø9.53 Ø9.7 8 Ø25.4 Ø25.6 12 0,08 0 0,09 0,12 0 0,08 d1 +0,08 +0,1 0,38 +0,12 +0,1 0,42 Ø12.7 Ø12.9 8 Ø28.58 Ø28.78 12 0,08 0 0,19 0,12 0 0,08 +0,09 +0,1 0,41 +0,12 +0,1 0,47 a d2 Ø15.88 Ø16.1 8 Ø31.75 Ø32.0 12 0,09 0 0,13 0,12 0 0,13 +0,09 +0,1 0,44 +0,12 +0,1 0,52 Ø19.05 Ø19.3 10 Ø38.1 Ø38.3 14 0,09 0 0,16 0,12 0 0,18 pag. 57

Piping and Refrigerant Charge A basic brazing method is shown below. 2. Heat the outer tube evenly, resulting in good flow of filler metal Nitrogen Gas Flow 0.05 m³/h or smaller Reducer Valve: Open this valve only when supplying 1. Heat inner side tube evenly High Pressure Hose Rubber Plug Packless Valve 0.03 a 0.05 MPa (0.3 a 0.5 Kg cm²g) ATTENTION: Use nitrogen gas for blowing during pipe brazing. If oxygen, acetylene or fluorocarbon gas is used, it will cause an explosion or poisonous gas. A lot of oxidation film will occur 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 cycle,resulting in clogged expansion valves, etc... This will cause bad influence to the compressor. 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 a excessively high pressure is applied to a pipe, it will cause an explosion. 7.5.6. Flushing Refrigerant Pipes It is required to remove Oxidation Film, Moisture or Dusts in case of insufficient Nitrogen Blow during Brazing, or Careless Handling of Tubes. Release the pressure at a time after the hand can not close due to the pipe and pressure. Attach a flare plug and close the end until flushing work is completely performed. Indoor Unit 1 Flare Stop Valve Gas pipe Outdoor unit Stop Valve Open the stop valve of a nitrogen cylinder and increase the pressure up to 5 bar through a reducer valve. Check to ensure that nitrogen gas is discharged from de service port in the outdoor unit. FLUSHING: Perform flushing work for the pipes to the indoor units one by one. Indoor Unit 2 Manifold Valve Close the outlet of the pipe by hand. Release the pressure at a time after the hand can not close the pipe end due to pressure.. (First flushing). Open this when nitrogen is supplied. Flare Plug Pressure Reducer Compound Gauge Release the pressure at a time after the hand can not close the pipe end due to pressure. (Second flushing). Check the contents and quantity of dusts by applying cloth at the end of the pipe at flushing. If slight water is detected, perform a vacuum drying to remove moisture completely. Dried Nitrogen Perform the same work for gas piping after liquid piping pag. 58

Piping and Refrigerant Charge 7.5.7. Air Tight Presure Test 1. After perform the piping work, brazing work and before to change new refrigerant R410A, it is required to check that brazing is completely performed without any leakage after refrigerant pipe brazing. In particular, the new refrigerant R410A, operates in a higher pressures than R407C. Therefore, it needs more careful brazing work. Connect a manifold gauge to the check joint an the liquid side and gas side stop valves. Gradually increase the pressure step by step without opening the stop valves. 1 step 2 step 0.5 MPa (~5 Kg cm²) 1.5 MPa (~15 Kg cm²) 5 min or over 5 min or over able to find small leakage Outdoor unit Liquid Stop valve DO NOT exceed More than 3.3MPa Reducer Valve Open this when nitrogen is supplied 3 step 4.15 MPa (~41.5 Kg cm²) 24 h or over able to find fine leakage Gas Stop Valve High Pressure Hose Manifold Valve Dried Nitrogen Nitrogen gas should be used for an air tight test. If accidentally oxygen or acetylene or fluorocarbon gas is used, it will cause an explosion or poisonous gas. 2. Perform an air tight test with a pressure of 4.15 MPa (= 41.5 Kg cm²) for R410A holding for 24 hours. If no pressure decrease is observed, it is judged that no leakage exist. If a pressure decrease is observed, check for leakage. However, in the case that there is ambient temperature difference between the pressure applying time and the final check time, perform the following temperature correction, since pressure are different according to an ambient temperature by approx. 0.01 MPa (=0.1 kg cm²) per 1ºC. 7 Correction: Temp. at pressure applying time (Temp. at checking time) x 0.01 MPa (or 0.1 Kg cm²). Example. Pressure Temperature conditions When pressure is applied 4.15 MPa (41.5 Kg cm²) R410A 28 ºC After 24 hours 3.25 MPa (32.5 Kg cm²) R410A 23ºC Correction (2823) x { 0.01=0.05 MPa 0.1=0.5 Kg cm² 5 ºC 3. If any leakage is detected locate it as follows: Check by Listening: Listen to sound from a leakage portion Check by touching: Check for a leakage portion by touching Check by foaming agent: Apply foaming agent pag. 59

Piping and Refrigerant Charge 7.5.8. Vacuum Drying The purpose of vacuum drying is to dry inside of the refrigeration cycle by decreasing pressures, evaporating moisture and discharging moisture and air from the refrigeration cycle. It is requires to strictly perform vacuum pumping work, due to its characteristics of the refrigerant R410A and lubrication oil. If moisture remains inside of the refrigerating cycle, will cause hydration, resulting in abnormal pressure due to clogging in the refrigeration cycle. Also oxidation reaction with synthetic oil will cause insulation deterioration of the compressor motor. Perform vacuum pumping until an appropriate vacuum degree is obtained due to its high absorption. Use a good vacuum pump, which provides a high vacuum degree performance Use a new manifold valve and a charging hose only for the new refrigerant Perform vacuum pumping work according to the following procedures. 1. Check to ensure that the liquid and gas stop valves are completely closed. 2. Connect a manifold valve, a vacuum pump, a vacuum gauge for the new refrigerant to stop valves. 3. Operate the vacuum pump for more than 2 hours until. In the case that the vacuum degree of 755 mmhg is not available, check for any leakage, since a leakage or existence of moisture is suspected. After the check, operate the vacuum pump more than one hour. Pressure (mmhg) Atmosphere Pressure Abnormality (leakage or moisture) 755 mmhg 1~2 hr Time 1 hr Vacuum Pumping Stop of the pump Evaporation of Water Water boiling temperature is 100 ºC under atmosphere. However, boiling point decreases when vacuum degree is increased. Therefore, the higher vacuum degree is, the higher vacuum drying is available. Gas Stop Valve Manifold valve for new Refrigerant In the case that dewing inside piping is suspected, it is not easy to obtain the high vacuum degree due to dew evaporation and it requires to control the degree strictly. It is preferable to obtain a vacuum degree of 755 mmhg (5 to 2 Torr). Liquid Stop valve Indoor unit To refrigerant Cylinder Vacuum Pump pag. 60

Piping and Refrigerant Charge Check of vacuum degree The vacuum degree should be checked by a vacuum gauge. However, vacuum degree reading is not available by the gauge connected to the manifold valve. It is recommended that a digital type vacuum gauge be used. 7.5.9. Refrigerant charge procedure After finish the sumarized evaucation procedure, refrigerant charging procedure should be performed according to the next instructions: 1. The stop valves have been closed before shipment, however, ensure that the stop valves are closed completely. 2. Connect the indoor unit and the outdoor unit with fieldsupplied refrigerant tubes. 3. 4. Connect the gauge manifold using charging hoses to a vacuum pump, a refrigerant charging cylinder and a nitrogen cylinder to the check joint of the liquid line stop valve. Check for any gas leakage at the flare nut connection, by using oxygen free nitrogen gas to increase the pressure inside of the fieldsupplied tubes.. Operate the vacuum pump until the pressure decreases lower than a pressure of 756 mm Hg in vacuum. 6. Charge refrigerant (only if necessary according to data in chapter 13.12) by opening the gauge manifold valve. If the required quantity cannot be charged, follow procedures (7) to (9). Otherwise proceed step (10). NOTE: An excess or shortage of refrigerant is the main cause of trouble to the units. Correctly Charge Refrigerant. 7. Fully open the gas line stop valve 8. Slightly open the liquid line stop valve 9. Charge the required refrigerant by operating the system (Setting the remote control switch at cool) 10. Fully open the liquid line stop valve after completing refrigerant charge. 7 Gas pipe Manifold Gauge Insulation for Piping Vacuum Pump Insulate gas piping and liquid piping separately and cover the piping from outside Liquid Piping Stop Valve and Liquid Side Stop Valve and Gas Side Nitrogen Cylinder Refrigerant Charge Cylinder Insulation for Piping: Gas and liquid piping must be separately insulated. CAUTION: Do not charge OXYGEN, ACETYLENE, or other flammable and poisonous gases into the refrigerant cycle when performing a leakage test or an airtight test. These types of gases are extremely dangerous, because explosion can occur. It is recommended that oxygen free nitrogen be charged for these types of tests. Insulate the unions and flarenuts at the piping connection part completely. Insulate properly liquid piping to avoid a decrease of performance; if not, it will cause sweating on the surface of the pipe. Charge refrigerant correctly. Overcharging or insufficient charging will cause a compressor failure. Check for refrigerant leakage in detail. If a large refrigerant leakage occurred, it would cause difficulty with breathing or harmful gases would occur if a fire were being used in the room. Insulation for Connection Parts: The connection part must be insulated by the field supplied insulation materials. Nitrogen: For Leakage Test and Brazing pag. 61

Piping and Refrigerant Charge 7.6. Refrigerant Charging Quantity Refrigerant has been charged into this unit for 10 m of length pipe. It is required that additional refrigerant be charged according the piping length if it is higher than 10 m 1. Determine an additional refrigerant quantity to the following procedure, and charge it into the system. 2. Record the additional refrigerant quantity to facilitate service activities thereafter. CAUTION: When charging refrigerant accurately measure refrigerant to be charged. Overcharging or undercharging of refrigerant can cause compressor trouble. Outdoor Unit Factory Charge unit W 0 :Ref. charge Kg W (10m) Kg RASC5 4.80 0.70 RASC10 8.50 1.20 7.6.1. Additional Refrigerant Charge Calculation for Liquid Piping (W1 Kg). See examples and fill in the following table: Single System RASC5/10 Model Indoor unit RCI5.0FSN1E RPI5.0FSN1E RPC5.0FSNE RCD5.0FSN RPI10.0FSNE Outdoor unit RASC5HNE RASC10HNE Actual Total Piping Length (m) 050 030 Pipe Size for Gas Line Out. Dia. (mm) 15.88 25.40 Thickness (mm) 1.0 1.0 Piping size Liquid Line Out. Dia. (mm) 9.53 12.7 Thickness (mm) 0.8 1.0 Factory charged quantity in outdoor unit (Kg) 4.8 8.5 Additional Charging Quantity For more than 10m 70 g/m 120 g/m pag. 62

Piping and Refrigerant Charge Twin System Example RASC5 9.53 9.53 9.53 Pipe Diameter Total Piping Length Additional Charge (Kg) Ø 9.53 10+10+30 x 0.070 = 3,50 10 m Factory Charge W (10m) = 0,70 Additional Charge W1 Total = 2.8 (Kg) Total Additional Charge W1: 2,80 Kg Outdoor Unit Factory Charge Wo : 4,80 Kg Total Ref. Charge of this System: 7,60 Kg Year Month Day Triple System Example 12.70 RASC10 9.53 9.53 9.53 Pipe Diameter Total Piping Length Additional Charge (Kg) Ø 12.7 15 x 0.120 = 1,80 Ø 9.53 3+3+6 x 0.070 = 0,84 10 m Factory Charge W (10m)= 1,20 Additional Charge W1 Total = 1.44 (Kg) Total Additional Charge W1: 1,44 Kg Outdoor Unit Factory Charge Wo : 8,50 Kg Total Ref. Charge of this System: 9,94 Kg Year Month Day 7 Quad System Example 12.70 RASC10 9.53 9.53 9.53 9.53 Pipe Diameter Total Piping Length Additional Charge (Kg) Ø 12.7 15 x 0.120 = 1,80 Ø 9.53 10+8+12+10 x 0.070 = 2,80 10 m Factory Charge W (10m)= 1,20 Additional Charge W1 Total = 3.40 (Kg) Total Additional Charge W1: 3,40 Kg Outdoor Unit Factory Charge Wo : 8,50 Kg Total Ref. Charge of this System: 11,90 Kg Year Month Day pag. 63

Electrical data 8. E l e c t r i c a l d a t a This chapter describes the electrical requeriments for outdoor units RASC5/10HNE UtopiaN (410A) series of Hitachi. Contents 8. Electrical Data...65 8.1. Outdoor Units... 66 8 pag. 65

Electrical data. 8.1. Outdoor Units Outdoor units Unit Main Power Applicable Voltage (V) U PH F Max. Min. PH STC Motor Compressor Cooling operation RNC IPT RNC IPT Outdoor Fan Motor Heating operation RNC IPT RASC5HNE 400 3 50 457 342 3 74 7.5 4.29 7.0 3.96 5.7 0.86 19.5 RASC10HNE 400 3 50 457 342 3 111 15.4 8.55 13.7 7.60 6.3 1.20 32 MC U: Supply Voltage (V) PH: Phase (φ) PH: Frequency (Hz) STC: Compressor Input Power (A) RNC: Running Current (A) IPT: Total power (kw) MC: Maximum current power consumption (A) NOTE: This data is based in conditions of nominal capacity. Refer to the notes in the general data (Chapter 2). pag. 66

Electrical Wiring Diagrams 9. E l e c t r i c a l w i r i n g d i a g r a m This chapter shows the electrical wiring diagrams of outdoor units RASC UtopiaN (R410A) of Hitachi. If you need detailed information about Indoor units, please refer to Technical Catalogue TCGB0036. Contents 9. Electrical wiring diagram...67 9.1. Units RASC5/10HNE... 68 9.2. Diagram abbreviations description... 69 9 pag. 67

Electrical Wiring Diagrams 9.1. Units RASC5/10HNE NOTE: All the field wiring equipment must comply with local codes. For more information about DWS configuration, please refer to chapter 10 of this catalogue See the diagram abbreviations description at the end of this chapter. pag. 68

Electrical Wiring Diagrams 9.2. Diagram abbreviations description. Mark C CH CMC CN DS DSW EF ITO LD / LED M(C) M(OF) MT NF PCB PS(H) PS(C) PSW R RVR SV SSR TB THM TF Y Symbol Description Condenser Crankcase heater Contactor for Compressor Motor Connector Inserting Type Connector Setting switch Fuse Internal Thermostat for Outdoor Fan Motor Alarm Code Motor for Compressor Motor for Outdoor Fan Circuit breaker Noise filter Printed Circuit Board Pressure switch high Pressure Switch (Control) Switch handle Ressistor Reversing valve relay Solenoid valve Thyristor Terminal board Thermistor Tranformer Relay Description Terminals Closedend Connector Fieldsupplied Field Witinrg Earth Wiring Factory wiring 9 NOTE: All the field wiring equipment must comply with local codes. For more information about DWS configuration, please refer to chapter 10 of this catalogue See the diagram abbreviations description at the end of this chapter. pag. 69

Electrical Wiring Diagrams pag. 70

Electrical wiring and setting configuration 10. E l e c t r i c a l w i r i n g a n d c o n f i g u r a t i o n This chapter descibes the electrical wiring connections and how to set the dip switches for outdoor units RASC HNE UtopiaN series of Hitachi. Contents 10. Electrical wiring and configuration...71 10.1. General checking... 72 10.2. Electrical Wiring Connection for Outdoor Units... 73 10.2.1. Setting the DIP Switches for the Outdoor Unit... 74 10.3. Common Wiring... 75 10.3.1. Electric Wiring between Indoor Unit and Outdoor Unit... 75 10.3.2. Wire Size... 76 10.3.3. HLINK System... 77 10.3.4. Single, Twin, Triple and Quad DIP Switch Setting... 79 10 pag. 71

Electrical wiring and setting configuration 10.1. General checking 1. Ensure that the fieldsupplied electrical components (mains power switches, circuit breakers, wires, connectors and wire terminals) have been properly selected according to the electrical data indicated. Make sure that they comply with national and regional electrical codes. 2. Check to ensure that the power supply voltage is within +/10% of the rated nominal voltage. 3. Check to ensure that power supply has an impedance low enough to warranty not reduce the starting voltage more than 85% of the rated voltage. 4. Check to ensure that the earth wire is connected. 5. Connect a fuse of specified capacity. DANGER: 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. NOTE: Check and test to ensure that if there are more than one source of power supply, that all are turned OFF. Following the Council Directive 89/336/EEC and its amendments 92/31/EEC and 93/68/EEC, relating to electromagnetic compatibility, next table indicates maximum permissible system impedance Zmax at the interface point of the user s supply, in accordance with EN61000311 MODEL Z MAX (Ω) RASC5HNE 0.21 RASC10HNE 0.12 CAUTION: Check to ensure that the indoor fan and the outdoor fan have stopped before electrical wiring work or periodical check is performed. Protect the wires, drain pipe, electrical parts, from rats or other small animals. If not protected, rats may damage at unprotected parts, and at the worst, a fire will occur. Wrap the accessory packing around the wires, and plug the wiring connection hole with the seal material to protect the product from any condensed water and insects. Tightly secure the wires with the cord clamp inside the indoor unit. Lead the wires through the knockout hole in the side cover when using conduit. Secure the cable of the remote control switch with the cord clamp inside the electrical box. Electrical wiring must comply with national and local codes. Contact your local authority in regards to standards, rules, regulations, etc. Check that the ground wire is securely connected. Connect a fuse of specified capacity. pag 72

Electrical wiring and setting configuration 10.2. Electrical Wiring Connection for Outdoor Units The electrical wiring connection for the outdoor unit is shown below. Table for Terminal Connection: NOTE: OU: outdoor unit IU: indoor unit R: Remote Controler CS.: Central Station Wiring Power Supply. [Connection (connection of terminals)] [UEUE (L1L1, L2L2, L3L3, NN)] [UIUI (L1L1, NN)] Operate [UEUI, UIUI (11, 22)] Remote Controls [R, CS (AA, BB)] 1. Connect the power supply wires to L1, L2, L3 and N, for the three phase units on the terminal board and ground wires to the terminals, in the electrical control box. 2. Connect the electrical wiring between indoor unit and outdoor unit (and between indoor units in case of Twin, Triple or Quad systems) to the terminal board at 1 and 2 marks. If the indoor unit power source wires are connected with the outdoor unit connect also them to terminals L and N to the terminal board. 3. Tightly secure the wires inside the outdoor unit with a band. Power Supply. Operation wiring between indoor unit and outdoor unit 4. Check the item below before turning ON the main switch. In case the power source is 415V (nominal voltage), change CN21 (connector) to CN22 of transformer (TF1) in the electrical control box as shown in figure below. 10 5. Use factory supplied rubber bushes in order to protect wires from damages produced by hole edges and pag. 73

Electrical wiring and setting configuration 10.2.1. Setting the DIP Switches for the Outdoor Unit Quantity and position of DIP switches The PCB in the Outdoor Unit is operating with 5 types of DIP Switches, 1 Single Switch and 1 Push Switch. The location is as follows: DSW1: Test operation and option functions settings Before shipment. 1 2 3 4 5 6 DS {} W2: Factory fixed settings Normal Operation 1 2 3 4 DSW3: Capacity Settings Model 5HP 10HP Setting position 1 2 3 4 1 2 3 4 DSW4: Refrigerant cycle no. Settings Before shipment. 1 2 3 4 DWS5: Transmitting setting Before shipment. 1 2 PSW Manual defrost Press for manual defrost. pag 74

Electrical wiring and setting configuration 10.3. Common Wiring CAUTION: All the field wiring and electrical components must comply with local codes. 10.3.1. Electric Wiring between Indoor Unit and Outdoor Unit Connect the electrical wires between the indoor unit and the outdoor unit, as shown below. Check to ensure that the terminal for power source wiring (terminals L1 to L1, L2 to L2, L3 to L3 and N to N of each terminal board: of 400Vca), and intermediate wires (operating line: terminals 1 to 1 and 2 to 2 of each terminal board: DC5V) between the indoor unit and the outdoor unit coincide correctly. If not, some component will be damaged. When you are installing the electrical wiring, follow the local codes and the local regulations. Connect the operation wiring to the units in the same refrigerant cycle (The refrigerant piping and the control wiring should be connected to the same indoor units). If the refrigerant piping and the control wiring are connected to the units in the different refrigerant cycle, it may cause a abnormal operation. Use twisted shielded pair wiring for operation wiring between outdoor unit and indoor unit, and also for operation wiring between indoor units (HLink connection). It can be also used Shielded pair wiring. Shield shall be connected to earth only in one cable side. Do not use more than 3 cores for operation wiring (H Link). Core sizes must be selected according to the national regulations. Connect the operating line for the units in the same refrigerant cycle (The refrigerant line shall be connected to the indoor units with the refrigerant piping connected to the same outdoor unit). In the case that each of the refrigerant piping and the operating line is connected to the units of different cycle, it may cause an abnormal operation. Open a hole near the connection hole of power source wiring when the multiple outdoor units are connected from one power source line. The recommended breaker sizes are shown in the table of electrical data and recommended wiring, breaker size\1 O.U. In the case that a conduit tube for fieldwiring is not used, fix rubber bushes with adhesive on the panel. All the field wiring and the equipment must comply with the local codes and the international codes. ATTENTION: Pay attention to the connection of the operating line. Incorrect connection may cause the failure of PCB. ELF ELB Outdoor unit No.0 system TB1 TB2 L1 L2 L3 N L1 L2 Operating Line (Shielded Wires) 5Vcc (NonPole Transmission, H LINK System) ELF ELB Outdoor unit No.0 system TB1 TB2 L1 L2 L3 N L1 L2 Operating Line (Shielded Wires) 5Vcc (NonPole Transmission, H LINK System) 10 CB CB ELB 3~ / N 380V / 50Hz 415V / 50Hz L1 L2 N 1 2 A B No.0 TB L1 L2 N 1 2 A B No.1 TB 3~ / N 380V / 50Hz 415V / 50Hz 1~ / N 220V / 50Hz 240V / 50Hz L1 L2 N 1 2 A B No.0 TB L1 L2 N 1 2 A B indoor unit indoor unit indoor unit indoor unit Remote Control SW No.1 TB Remote Control SW TB CB ELB Max 4 Units per Refrigerant Cycle : Terminal board : Circuit breaker : Earthleakage breaker : Field Witinrg : Field Witinrg : Fieldsupplied. : Accesory Max 4 Units per Refrigerant Cycle pag. 75

Electrical wiring and setting configuration 10.3.2. Wire Size Recomended minimum sizes for field provided wires: Model Power Supply Electrical consumption maximum Size of power source cable EN603351 MLFC All indoor units (*) 5 A 0.75 mm² 0.75 mm² 1N~ 230V 50Hz RPI8/10 6 A 1 mm² 0.75 mm² RASC5HNE 20 A 2.5 mm² 2 mm² 3N~ 400V 50Hz RASC10HNE 32 A 6 mm² 3.5 mm² (*) Except 8/10 HP units Size of transmission cable EN603351 MLFC 0.75 mm² 0.5 mm² The above wire sizes marked with are selected at the maximum current of the unit according to the European Standard, EN603351. The above wire sizes marked with are selected at the maximum current of the unit according to the wire, MLFC (Flame Retardant Polyflex Wire) manufactured by HITACHI Cable Ltd. Japan. In case that the power cables are connected in series, add each unit maximum current and select according to the next table. Selection according EN603351 Selection according MLFC (Wiring temperature of 60ºC) Current i (A) Wire Size (mm²) Current i (A) Wire Size (mm²) I 6 0,75 I 15 0.5 6 < i 10 1 15 < i 18 0.75 10 < i 16 1.5 18 < i 24 1.25 16 < i 25 2.5 24 < i 34 2 25 < i 32 4 34 < i 47 3.5 32 < i 40 6 47 < i 62 5.5 40 < i 63 10 62 < i 78 8 63 < i 78 < i 112 14 112 < i 147 22 If the current exceeds 63A, do not connect the cables in series. NOTE: Follow local codes and regulations when selecting field wires, Circuit breakers and Earth Leakage breakers Use wires that are not lighter than the ordinary polychloroprene sheathed flexible cord (code designation H05RNF) Select the main switches in according to the next table: Model Power Supply. Maximum Current All indoor units (*) 5 A 6 1N~ 230V 50Hz RPI8/10 6A 10 RASC5HNE 20A 25 3N~ 400V 50Hz RASC10HNE 32 A 40 CB ELB no. poles/a/ma 2/40/30 4/40/30 (*) Except 8/10 HP units ELB: Earthleakage breaker CB: Circuit Breaker (A) pag 76

Electrical wiring and setting configuration 10.3.3. HLINK System 1. Application: The new HLINK wiring system requires only two transmission wires connecting each indoor unit and outdoor unit for up to 16 refrigerant cycles, and connecting wires for all indoor units and all outdoor units in series. You can apply this HLINK system to the following models. ATTENTION: The HLINK system cannot be applied to the models with the old cycle, nor to the units that have an old transmission. NOTE: CSNET is an optional complementary software that can be applied to the system and which provides a total and centralized control of all the units. SYSTEM FREE 2. Features: Indoor Uni RCIOOOFSN1E RCIMOOOFSN RCDOOOFSN RPCOOOFSNE RPIOOOFSN(1)E RPKOOOFSN(1)M RPFOOOFSNE RPFIOOOFSNE UTOPIAN (R410A) Outdoor Unit RASCOOOHNE The HLINK has the following features and specifications: ATTENTION: For the HLINK System you must use Twisted Shielded Pair Cable or Shielded Pair Cable Features: The total wiring length is remarkably reduced. Only one connection is required for the wiring between the indoor unit and the outdoor unit. Easy wiring connection to the central controllers Specifications: Transmission cable: 2 Wire Polarity of Transmission cable: NonPolar Wire Maximum quantity of Outdoor Units that can be connected: 16 Units per HLINK System Maximum quantity of Indoor Units that can be connected: 16 Units per cycle and 64 Units per HLINK system Maximum wiring length: Total 1000m (including CSNET). Recommended Cable Twist Pair Cable with Shield, over 0.75mm2 (Equivalent to KPEV S) Voltage: DC5V 10 3. Example of HLINK system: Outdoor unit Diagram example Using the HLINK system for the air conditioning systems only There are two typical cases of using HLINK system; 1. 2. Using the HLINK system for the air conditioning systems only, and Using HLINK System with Air Conditioners with Central Control Device, and the system examples are as shown Indoor Units A refrigerant cycle Transmission cables Refrigerant tubing CSNet pag. 77

Electrical wiring and setting configuration Line Connection with all units Outdoor Units Do not make wiring in a loop Indoor Units Line Connection for Each Floor Outdoor Units Indoor Units In case that HLINK is not applied when you are installing the electrical wiring. Outdoor Units NOTE: Do not install the wiring in a loop. In the case that HLINK is not applied after the when electrical wiring is performed as shown above, HLINK is applied after the instrument wiring is completed. Therefore, you must set the DIP switches according to Setting the DIP switches on the PCB. Indoor Units CSNET 4. Dip Switch Setting of Indoor PCB and Outdoor PCB. It is required to set DIP switches of every indoor unit and outdoor unit. pag 78

Electrical wiring and setting configuration 10.3.4. Single, Twin, Triple and Quad DIP Switch Setting Dip Switch Setting (No HLink example): SINGLE TWIN TRIPLE QUAD Dip switch setting (HLink example): Cycle Nº0 Cycle Nº1 Cycle Nº2 Before shipment. Cancellation Cancellation Mark Description DSW5 (End Terminal Resistance) DSW4 (Refrigerant Cycle) Unidad exterior Indoor Units DSW5 (refrigerant cycle) RSW (address of indoor unit) 10 pag. 79

Electrical wiring and setting configuration Unit Name of DIP switch Mark Setting before the shipment Function Refrigerant cycle DSW4 1 2 3 4 For setting the refrigerant cycle address of the outdoor unit. Set the DSW4 not to overlap the setting of other outdoor units in the same HLINK system Outdoor Unit End Terminal Resistance DSW51P 1 2 For matching the impedance of the transmission circuit. Set the DSW5 according to the quantity of outdoor units in the HLINK system. Setting of End Terminal Resistance Before Shipment, Nº 1 pin of DSW5 is set at ON side In the case that the outdoor units quantity in the same Hlink is 2 or more, set No.1 pin of DSW5 at the OFF side from the 2nd unit. If only is used a single outdoor unitnon setting is required. Indoor Uni Refrigerant cycle Address of indoor unit DSW5 RSW 1 2 3 4 0 For setting the refrigerant cycle address of the indoor unit. Set the DSW5 corresponding to the address of outdoor unit in the same refrigerant cycle. For setting indoor unit address. Set the RSW not to overlap the setting of other indoor units in the same refrigerant cycle. pag 80

Available optional functions 11. A v a i l a b l e o p t i o n a l f u n c t i o n s This chapter gives a brief explanation of the available optional functions of outdoor units RASC UtopiaN (R410A) series of Hitachi. For more information about indoor units and remote controllers available functions, refer to the Technical Catalogue TCGB0036. Contents 11. Available optional functions...81 11.1. Available optional functions... 82 11 pag. 81

Available optional functions 11.1. Available optional functions The following table gives information about available optional functions Optional Function Useful explanation RASC5 Unit RASC10 Demand thermo off When this function is activated the compressor is stopped and the indoor units are put under ThermoOFF condition. Defrosting condition change over This function changes the defrosting operation conditions. It is specially interesting for cold areas Release Ambient Temperature Limit This function allows to increase the limit outdoor temperature in heating mode and cooling mode Slow defrost setting When this function is activated the indoor fan speed at defrost mode is change to slow instead of stopped. Available pag. 82

Troubleshooting 12. T r o u b l e s h o o t i n g This chapter provides you with a concise description of the most common alarm codes of the outdoor units RASC UtopiaN (R410A) series of Hitachi. For more information about Troubleshooting data refer chapter 8 of SMGB0036. Contents 12. Troubleshooting...83 12.1. Alarm code indication of remote control switch... 84 12.2. Alarm codes... 84 12 pag. 83

Troubleshooting 12.1. Alarm code indication of remote control switch If RUN lamp flashes for 2 seconds, there is a failure in transmission between Indoor Unit and Remote Control Switch. Possible causes are: Remote cable broken Contact failure in remote control cable IC or microcomputer defective In any case, ask your contractor for service If RUN lamp flashes 6 times (5 seconds) with unit number and alarm code displayed, note the alarm code (see table below) and ask your contractor for service. Indoor unit number with abnormality Abnormal Ref. Cycle No. Alarm Code Model code Connected No. of Indoor Units Alarm Code Indication Model code Model Heat pump 0101 ADDS RN Indicated for a second alternately 01 RN Inverter Multi Only cooling Others 12.2. Alarm codes Indication Code Category Content of Abnormality Leading Cause Indoor Uni Safety Device of the Indoor Unit is tripped Failure of Fan Motor, Float Switch PCB, relay Outdoor unit Safety device of outdoor unit is tripped High pressure Switch, failure of fan Motor Gear Abnormality between indoor and outdoor unit (or Indoor) Incorrect Wiring, Failure of PCB, Tripping of Fuse, Power Supply OFF Electric Abnormality of power source Wiring Reverse phase incorrect wiring Cycle Abnormality High Temperature in the top of Comp. Not enogh refrigerant, leakage, clogging capillary Inlet air thermistor Outlet air thermistor 14 Sensor on the indoor unit Freeze Protection Thermistor Thermistor for gas pipe 15 Fresh Outdoor Air Thermistor (Econofresh) Failure of Thermistor, sensor, Connection Tripping of Protection Device for Fan Motor Failure of Fan Motor. Sensor on the Outdoor Unit Thermistor for Upper Part of Compressor Fresh Outdoor Air Thermistor Failure of Thermistor, sensor, Connection Evaporating Thermistor (Defrosting) Incorrect setting of Outdoor and Indoor Unit Incorrect setting of capacity code Incorrect Setting in Indoor/Outdoor Unit No. Existence of the same Indoor Unit No. in the same Refrigerant Cycle Of the system Indoor unit PCB failure, incorrect wiring connection to Abnormality of Protective Circuit in Outdoor Unit outdoor unit PCB. Abnormality of Running Current at Compressor Overcurrent, Melted Fuse or failure of current sensor. Excessive Overload during Cooling Operation Heat Exchanger Airflow obstacle, short circuit and locked fan motor. Pressure Excessive Overload during Heating Operation Heat Exchanger Airflow obstacle, short circuit. Low pressure Decrease Protection Activating Not enough refrigerant, leakage (Hex Lock) EE Inverter Compressor Protection 3 Time Occurrence of Alarm Giving Damage to Compressor within 6 hours. pag. 84

HITACHI is participating in the EUROVENT Certification Programme. Products are as specified in the EUROVENT Directory of Certified Products. HitachiAir Conditioning Products Europe, S.A. Ronda Shimizu,1 Políg. Ind. Can Torrella 08233 Vacarisses (Barcelona) España ISO 9001 Certified byaenor, Spain ISO 14001 Certified byaenor, Spain Hitachi Air Conditioning Systems Operation Shimizushi, Shizuokaken, Japan ISO 9001 Certified by JQA, Japan ISO 14001 Certified by JQA, Japan Hitachi Air Conditioning Products (M) Sdn. Bnd. Lot No. 10, Jalan Kemajan Bangi Industrial Estate 43650 Bandar Baru Bangi, Selangor Darul Ehsan, Malaysia Certification ISO 9001, Malaysia Certification ISO 14001, Malaysia TCGB0040 rev.0 01/07 Printed in Spain