Hitachi RCUA065AVMY Installation, Operation And Maintenance Manual
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Hitachi RCUA065AVMY Installation, Operation And Maintenance Manual

Modular air-cooled inverter scroll chiller and heat pump
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Installation, Operation and
Maintenance Manuel
Inverter Scroll Chiller and Heat Pump
Attention
Before installation and use, please
read the manual carefully and keep it
properly for future reference.
Hitachi Modular Air-cooled
Model (R410A refrigerant)
RCUA065AVMY
RCUA130AVMY
RCUA150AVMY
RHUA065AVMY
RHUA130AVMY
RHUA150AVMY

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  • Page 1 Model (R410A refrigerant) RCUA065AVMY RHUA065AVMY RCUA130AVMY RHUA130AVMY RCUA150AVMY RHUA150AVMY Installation, Operation and Maintenance Manuel Hitachi Modular Air-cooled Inverter Scroll Chiller and Heat Pump Attention Before installation and use, please read the manual carefully and keep it properly for future reference.

  • Page 2: Table Of Contents

    Contents Important notice ························································································································································· Preparation ························································································································································· 1.1 Preliminary inspection ································································································································ 1.2 Placement ······················································································································································ 1.3 Nomenclature ················································································································································ 1.4 Technical specification ································································································································ 1.5 Performance table ····························································································································· ··········· 1.6 Water pressure drop ···································································································································· 1.7 Product dimension ······································································································································· 1.8 Recommended foundation ····················· ··································································································· 1.9 Lifting and transportation ···························································································································...

  • Page 3: Important Notice

    ● Product design and performance of Hitachi will be continuously improved, and specifications are subject to change without notice. ● Hitachi makes no predictions as to the potential hazards that may arise from each possible situation. ● This manual cannot be reproduced without written permission.

  • Page 4: Preparation

    Preparation Preparation 1.1 Preliminary inspection Required information -- Review building information about the installation location. Installation location -- When determining the installation location of the unit, care should be taken to facilitate the installation of water pipes and wiring, and to avoid large amounts of water circulating nearby. Installation space -- Figure 2 shows the space required for maintenance and repair of the unit, and check if there are any obstacles that hinder the air flow of the air side heat exchanger.
  • Page 5 Fig. 1 Range of Maximum Inclination...

  • Page 6: Nomenclature

    Fig. 2 Installation Clearance Attention 1． The height of the wall must not exceed unit height. 2． If the unit is to be placed in a surrounding wall and the air flow is not smooth, please contact Hitachi for installation matters space 3．...

  • Page 7: Technical Specification

    Preparation 1.4 Technical Specification Model RC(H)UA065AVM RC(H)UA130AVM RC(H)UA150AVM Nominal cooling capacity Power Input (cooling) 19.8 39.6 48.7 3.28 3.08 kw/kw 3.28 IPLV@ARI kw/kw Nominal heating capacity Power Input (heating) 22.1 44.2 48.7 3.08 3.08 kw/kw 3.08 Nominal unit current draw (cooling) Nominal unit current draw (heating) Maximum start-up current Maximum unit current draw...

  • Page 8: Performance Table

    Preparation 1.5 Performance table Cooling performance RC(H)UA065AVM (Full load operation) Outdoor ambient temperature (℃) 20.0 25.0 30.0 35.0 40.0 43.0 CCAP CCAP CCAP CCAP CCAP CCAP 72.4 15.9 68.1 16.8 63.7 17.8 59.3 18.7 55.4 20.6 53.0 21.7 77.8 16.1 73.5 17.1 69.3...
  • Page 9 Preparation Heating performance RHUA065AVM (Full load operation) Outdoor ambient temperature (℃) HCAP HCAP HCAP HCAP HCAP HCAP HCAP 52.6 15.9 63.6 16.9 79.1 18.4 81.2 17.3 84.7 15.5 95.1 17.3 105.7 16.9 50.8 17.2 61.1 18.1 75.4 19.4 78.0 18.5 82.4 17.1 93.3...

  • Page 10: Water Pressure Drop

    Preparation 1.6 Water pressure drop Water-side heat exchanger pressure drop diagram as follow： 1.7 Product dimension RC(H)UA065AVMY...

  • Page 11: Recommended Foundation

    Preparation RC(H)UA130/150AVMY Fig. 3 Unit Dimension Drawing 1.8 Recommended Foundation CAUTION When the unit is mounted on the ground, the weight of concrete should be 1.5 to 2 times heavier than that of unit.
  • Page 12 Preparation RC(H)UA065AVMY RC(H)UA130/150AVMY Fig. 4 Recommended foundation drawings...

  • Page 13: Lifting And Transportation

    1.9 Lifting and transportation The unit is shipped as a whole, the refrigerant has been pre-charged in factory for normal operation. Please take care during shipment to avoid damage to the unit due to reckless operation When lifting equipment is used to move and hoist the unit, use lifting ropes and spreaders to prevent the rope from scratching the unit surface.

  • Page 14: Installation

    Installation 2. Installation 2.1 Wiring connection Tools and equipment - a set of wiring tools and universal testing instrument (clamp meter). Warning  Make sure that the electrical components used at the construction site (such as main power switches, fuses, wires, wire conduit connectors and terminal blocks etc.) meet the requirements of standards.
  • Page 15 Installation Terminal No. of communication wiring between modules: RC(H)UA065AVMY: 22: + terminal, 23: - terminal RC(H)UA130AVMY: 33: + terminal, 34: - terminal RC(H)UA150AVMY: : 37: + terminal, 38: - terminal Field Wiring Diagram NTC0 1 2 3 4 5 6 7 8 c d e f g h i j 7 8 c d 7 8 c d A0 B0...

  • Page 16: Recommendation On Unit Power Cable

    Installation 1 2 3 4 5 6 7 8 c d e f g h i j A0 B0 DC 24V Controller Communication line wiring notes: 1. Series wiring requirements：each unit has two terminals A, B used for communication connecting. Shielded twisted pair’s wiring must be in series, the connection mode of star is not allowed.

  • Page 17: Module Address Setting

    The above specifications of cable size are only for each single module. The specification of the bus cable needs to be selected according to the total load. You can contact Hitachi after-sales personnel for support. 2.3 Module address setting 2.3.1 Module address setting...

  • Page 18: Water Pipe Connection

    Installation be fully set to OFF 2.4 Water piping connection Multiple unit system typical hydronic diagram Module 0# Module 1# Module 2# Expansion tank Water supply pipe Bypass Bypass Bypass Water discharging pipe Water drain valve Water pump (commonly used) Backwater pipe Water pump (for standby use) Water drain valve...
  • Page 19 Installation When connecting the water pipes, please follow the instructions below: When the water pipe is connected to the unit, it must be connected to the connector or flange for easy removal when required. Recommend to use hose to attach water outlet and inlet to minimize movement. Water pipes should be properly supported to avoid having their weight directly to the unit and the brazed plate heat exchanger.
  • Page 20 Flow direction Fig. 7 Water flow switch Installation position and direction Caution  In the winter when the outside air temperature is very low, when the units are shutdown, water in the pumps and pipes could be frozen, causing damage to the units and pipes. To prevent freezing, when the unit is stopped, the pump may be activated effectively.
  • Page 21 Installation Example of water pipe connection: According to water flow in supply and return pipe, chiller water system can be classified into direct return and reverse return type. The schematics are as follows: module 0# module 1# module 2# module 15# Supply Return direct return water system...
  • Page 22 If the quantity of unit’s combination is above 8, reverse return water system is the only option. module 0# module 1# module 2# module N# Supply Return Quantity of modules combination ≤8 Supply Return Quantity of modules combination>8...

  • Page 23: Minimum Water Flow Rate

    Therefore, it is necessary to analyze the water quality, such as checking the PH (PH), conductivity, ammonia ion content, sulfur content, etc. If the above inspection fails, only industrial water can be used. The following table is the water quality standard of Hitachi evaporator.

  • Page 24: Check After Installation

    Installation Table 1 Item Chilled water system Tendency ○ ○ Standard quality pH (25℃) 6.8 ~ 8.0 6.8 ~ 8.0 ○ ○ Conductivity (mS/m) (25℃) Less than 40 Less than 30 ○ Chloride ion (mgCl - / l) Less than 50 Less than 50 ○...
  • Page 25 Maintenance work space Noise and vibration Daylight and rain Appearance No refrigerant leakage 3． Does the water pipe system meet the requirements? Water pipe size Drainage Length Water quality control Hose interface Air purification Piping Insulation Pressure control No water leakage at joint 4．Does the electrical wiring system meet the requirements? Wire capacity whether the connection is tight...

  • Page 26: Commissioning

    3.2 Commissioning If the wiring of the unit has been carried out in accordance with Hitachi standard wiring instructions, the operation test can be carried out as follows: 1． Press the magnetic switch of the pump to operate water system and check the operation status.

  • Page 27: Instructions After Commissioning

    Commissioning Attention  Noise is produced when compressor stops operation. This is caused by the high and low pressure balance of the compressor during shutdown, which causes the orbiting scroll to rotate. This is a normal phenomenon. After the check valve acts for a few seconds, the noise will stop. ...

  • Page 28: Central Controller Operation Instruction

    4. Central Controller Operation Instruction 4. 1 Controller introduction 1. Dimensions and installation Installation hole size Front The overall dimension and installation hole sizes are as follows:  Dimensions: 138×86×26 mm  Installation hole size: 130×78 mm The controller is designed for indoor application of residential and business environment. It is shall be positioned at a suitable height on a wall for easy access.

  • Page 29: Interface Introduction

    Control instructions 4.2 Interface introduction 4.2.1 Main interface "Mode": "cooling" and "heating" mode (only applicable to heat pump unit) "State": shows current status of the unit 1) Energized: the status of the unit just after power-on and before operation 2) Stop: status when the unit does not receive power-on signal or the status after the shutdown is completed 3) Starting: the stage when the unit is executing initialization after receiving the power-on signal 4) Auto-start when energized: Same as "Starting”, the stage of startup upon power on after sudden...
  • Page 30 Control instructions "Mode": Cooling / Heating (*The operation mode cannot be changed when the unit is in startup or antifreeze control process) "C W Set / H W Set": to set the desired system water temperature of chilled water or hot water. "Auto-start when energized ": for selecting whether to use the Auto-start function, where the ex-factory setting is "Disabled"...
  • Page 31 Control instructions Note: 1． The startup and shutdown time of the third section should be greater than the startup and shutdown time of the second section 2． The startup and shutdown time of the second section should be greater than the startup and shutdown time of the first section 3．...
  • Page 32 Control instructions water temperature control, chiller system will modulates the multiple units “On/Off” in order to maintain the active module compressors running at “40-80rps” as priority for higher efficiency  For leaving water temperature control (1) Single module in system Step 1: Set “W OUT”, the ex-factory setting of chiller water is 7°C and hot water is 45°C.
  • Page 33 Control instructions Default setting for “entering water temperature control” The settings are summarized as follows: Setting items Default value (range) Module quantity 1~16 Water cycle control of system 1 (0: W OUT, 1: W IN.) Mode cooling setting (water temp) 10°C Mode heating setting (water temp) 40°C...
  • Page 34 Control instructions 4.2.3 "Sys State" interface The page shows the basic parameters of the system, such as the total number of faults, ambient temperature, system water inlet temperature, system water outlet temperature, etc. “System W IN”: the inlet temperature of the master module (the lowest value of inlet water temperature of 1# and 2# for 130/150kW model.
  • Page 35 Control instructions “Comp. State”: to show the operating status, running time and operating current of compressor in each cycle “Exp V State”: to show the opening, superheat setting, and real time superheat of electronic expansion valve - 33 -...
  • Page 36 Control instructions “Output status”: to show the output status of relay on the PCB, the green light indicates that the output is valid 4.2.4 " VSD Drive State" interface To show the parameters of the VSD drive of each circuit Control instructions 4.2.5 "Alarm Log"...
  • Page 37  Users can browse any fault information of the unit in this page, including the date and time of the fault as well as the detailed alarm log, which can help user to perform corresponding operations for trouble shooting.  Each unit has own boards and connected with one central controller.

  • Page 38: Maintenance

    4． Before installation, the unit parameters to be set have been preset by the manufacturer. In general, users are not allowed to modify the parameters themselves. If it is necessary, please contact the agent or Hitachi service people. 5.2 Unit maintenance 1．...

  • Page 39: Water System Maintenance

    Maintenance refrigerant during cooling mode or the saturated condensing temperature of refrigerant during heating mode, and the absolute value of the difference shall be between 3-8℃. If the temperature difference exceeds this value range, the operating efficiency of the heat exchanger has been de-rated. Since some chemical treatment is required in the cleaning process, the cleaning work must be completed by professionals.

  • Page 40: Chiller System Schematic

    Maintenance 5.4 Chiller system schematic Refrigerant Charge Model RHUA065AVMY RHUA130AVMY RHUA150AVMY RCUA065AVMY RCUA130AVMY RCUA150AVMY Quantity 2*9 kg 4*9 kg 4*9.5 kg 2*7.5 kg 4*7.5 kg 4*7.5 kg (R410A) - 38 -...
  • Page 41 Maintenance Warning The refrigerant in the chiller system is designated. It is strictly forbidden to use refrigerant other than the designated one! In the event that a refrigerant other than the specified refrigerant is used in the unit, it may cause mechanical defects, mal-operation and failure, and even may cause serious safety accidents.
  • Page 42 Maintenance Caution 1) Regular maintenance Please maintain the unit regularly in accordance with this manual to ensure unit in sound condition 2) Fire In case of fire, turn off the main power switch and use a fire extinguisher suitable for oil or electrical fires.

  • Page 43: Wiring Diagram

    Maintenance 5.5 Wiring diagram - 41 -...
  • Page 44 Maintenance - 42 -...
  • Page 45 Maintenance - 43 -...
  • Page 46 Maintenance - 44 -...
  • Page 47 Maintenance - 45 -...
  • Page 48 Maintenance - 46 -...
  • Page 49 Maintenance - 47 -...
  • Page 50 Maintenance - 48 -...
  • Page 51 Maintenance - 49 -...
  • Page 52 Maintenance - 50 -...

  • Page 53: Common Faults And Troubleshooting

    6. Common faults and troubleshooting Alarm Code(English) Chinese Alarm Code(Chinese) Comment 0 号模块通讯故障 0# Mod. Comm. ALA #0 chiller module having communication error #0 chiller module having communication error 0 号模块与 1#变频器通讯故障 0# Mod. & 1# VSD Comm. ALA. with #1VSD board 0 号模块...
  • Page 54 Alarm Code(English) Alarm Code(Chinese) Comment #0 chiller module having #1 VSD board over 0 号模块 1#变频加速中过流 0# Mod. 1#VSD O.C in Speed up current during ramping up #0 chiller module having #1 VSD board over 0 号模块 1#变频减速中过流 0# Mod. 1#VSD O.C in Speed down current during ramping down #0 chiller module having #1 VSD board over 0 号模块...
  • Page 55 Table 6-1 Faults and troubleshooting Failure Possible Causes Check / Correct Power failure Power phase sequence error Adjust the phase sequence pump is not running Check if the pump is working properly, remove dirt in the Y type filter, Insufficient air water pipe blocked discharge air in the pipe;...

  • Page 56: Attachment: Feedback Form For Installation And Commissioning

    18. After starting the machine, operators who should receive training of unit operation are ready. Note: The questionnaire should be filled in truthfully. Hitachi reserves the right to charge customers extra labor costs due to insufficient preparation for the situation that the preparation does not conform to the description in the questionnaire.
  • Page 57 Johnson Controls-Hitachi Wanbao Air Conditioning (Guangzhou)Co., Ltd. The technical instructions herein are subject to change without prior notice, and this will help HITACHI bring the latest technology ideas to customers. Z0012004-2018-A Printed in China...

This manual is also suitable for:

Rhua065avmyRcua130avmyRhua130avmyRcua150avmyRhua150avmy

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