Hitachi RCUF100WZY Use And Maintenance Manual
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Hitachi RCUF100WZY Use And Maintenance Manual

Hitachi RCUF100WZY Use And Maintenance Manual

Water-cooled chillers unit
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Use and Maintenance Manual
Hitachi Water-Cooled Chillers Unit
Before installation of this water
chilling unit, please read this
manual carefully, and maintain it
properly for future reference.
-Screw Type-
Note:
Model
RCUF100WZY(-S)
RCUF155WZY(-S)
RCUF260WZY(-S)
RCUF365WZY(-S)
RCUF470WZY(-S)
RCUF125WZY(-S)
RCUF210WZY(-S)
RCUF310WZY(-S)
RCUF420WZY(-S)
RCUF520WZY(-S)

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Summary of Contents for Hitachi RCUF100WZY

  • Page 1 RCUF100WZY(-S) RCUF125WZY(-S) RCUF155WZY(-S) RCUF210WZY(-S) RCUF260WZY(-S) RCUF310WZY(-S) Use and Maintenance Manual RCUF365WZY(-S) RCUF420WZY(-S) RCUF470WZY(-S) RCUF520WZY(-S) Hitachi Water-Cooled Chillers Unit -Screw Type- Note: Before installation of this water chilling unit, please read this manual carefully, and maintain it properly for future reference.

  • Page 2: Table Of Contents

    □RCUF520WZY(-S)  Thanks for your purchase of Hitachi water chilling unit. Please read this Use and Maintenance Manual in details beforehand, so as to ensure correct use of the water chilling unit which you've purchased. Besides, this Use and Maintenance Manual will be helpful in case that the water chilling unit malfunctions or you have any doubt regarding the unit.

  • Page 3: Introduction

    前言 1 Introduction  This machine is suitable for domestic the relevant legal provisions. For more ordinary conditioners general information, please contact the persons industrial application. designated by the dealer or the manufacturer.   The chiller is a machine that is installed in This machine shall not be installed at the water or cold water equipment.
  • Page 4 Installation and Engineering  Please entrust the local distributor of the equipment you purchased or the professional for the installment. If the installation is inappropriate, there would have accidents such as the water leaks, electric shock, fire or chiller dumping and so on that may result in personal injury. ...
  • Page 5  Do not touch the protection device. The inside of the chiller is provided with a protection device for preventing an accident and a printed circuit board. When you come into contact with such a device or change its setting value, it may cause an accident such as breakdown, electric shock, fire, or explosion due to a short circuit.
  • Page 6  Always open the liquid line shutoff valve before running. When the liquid pipe shutoff valve is fully closed, the protective device will be activated and the machine will not be able to operate normally.  Please be sure to install the water pipe properly. Otherwise, it may cause a failure. Please install a filter (on-site preparation) equivalent to 20 mesh (punching metal shall be less than φ1.5 ...

  • Page 7: Names Of Structural Parts

    3 Names of Structural Parts ➀Name of Structural Parts of the Body The machine configuration of the chiller (RCUF100/125WZY(-S)) is shown in the following figure. The machine configuration of the chiller (RCUF155/210/260WZY(-S)) is shown in the following figure.
  • Page 8 The machine configuration of the chiller (RCUF310/365/420/470/520 WZY(-S)) is shown in the following figure.
  • Page 9 ➁Name of the Operation Parts of the Machine Body The machine body's operation parts configuration in the electric cabinet is shown in the following figure. [Electrical Cabinet (RCUF100/125WZY(-S)) Chief Engineer Configuration] Electric cabinet Rear side of electric cabinet door [Detailed Drawing of Liquid Crystal Display] Through the liquid crystal display (touch screen) to set water temperature, capacity control, etc.
  • Page 10 The machine body's operation parts configuration in the electric cabinet is shown in the following figure. [Electrical Cabinet (RCUF155/210/260WZY(-S)) Chief Engineer Configuration] Rear side of electric cabinet door Electric cabinet [Detailed Drawing of Liquid Crystal Display] Through the liquid crystal display (touch screen) to set water temperature, capacity control, etc. The current water temperature, running state, alarm content issued, alarm history and so on can LCD Monitor be confirmed through the liquid crystal display...
  • Page 11 The machine body's operation parts configuration in the electric cabinet is shown in the following figure. [Electrical control box (RCUF310/365/420/470/520WZY(-S)) Chief Engineer Configuration] Rear side of electric cabinet door Control box Electric cabinet Power box [Detailed Drawing of Liquid Crystal Display] Through the liquid crystal display (touch screen) to set water temperature, capacity control, etc.

  • Page 12: Commissioning

    4 Commissioning Key points before commissioning Before commissioning, confirm the following items to prevent the impact on the performance of the chiller. 1. Is the power supply connected correctly? Standard Voltage Specification 380V/415V 50Hz Special Voltage Specification 2. Is the grounding wiring connected? 3.
  • Page 13 Confirmation Matters during Commissioning Items Confirmation Benchmarks and Essentials Remarks Points Instantaneous voltage at startup of (1)Voltage compressor Tester ……(Rated voltage above 15%) Operating voltage.. (Within ± 1% nominal voltage) Special circumstances must be (2)Current Voltage phase imbalance.. within controlled within ± 3% (3)High pressure ±2% (4)Low pressure...

  • Page 14: Operation Method

    5 Operation Method This machine can be operated by the switch on the body or in the remote manner. The maximum number of the machines can be connected to 8 sets as one cold source system, and the number of units commensurate with the load can be run automatically. For the number of units, refer to "7-unit number control setting and operation method"...
  • Page 15 ➄－➅. ・Operation signal: ON pulse signal (above 200 m sec) ・Stop signal: OFF pulse signal (above 200m sec) ★ RCUF100WZY(-S) ON/OFF remote control ON/OFF button ★ PLR remote operation indicator lamp RCUF125WZY(-S) ★...
  • Page 16 （） ◆Body (local) operation (standard) Fully open inlet and outlet valves of chilled Running Order water and cooling water Turn on the power for the chiller Switch on the power for pump of chilled water and cooling water circulation and cooling tower Press the "Run"...

  • Page 17: Water Temperature Setting And Setting Method Of Application Function

    6 Water Temperature Setting and Setting Method of Application Function Water temperature and application function can be set through the DIP switch and shift switch on the liquid crystal display and setting substrate (PWBA). 1. Detailed plan of operation and display device (Detailed drawing of the liquid crystal display) Set the water temperature and control the capacity through the liquid crystal display (touch screen).
  • Page 18 [Controller Settings] Settings of the substrate of each unit RCUF100/125WZY(-S) RCUF155/210/260WZY(-S) RCUF310/365/420/470/520WZY(-S)
  • Page 19 PWBA (Setting Substrate) Setting Table Mark Content Settings Representative Model Not Used temporarily Not Used temporarily DSW1 50 horsepower RCUF100WZY(-S) 60/150/200/250 RCUF125/155/210/260/310/365/420/470/520 horsepower WZY(-S) Not Used temporarily Not Used temporarily Description: "0" and "1" indicate OFF and ON Settings: The functions are as follows: (1) Manual setting switch “DSW1-1”and DSW1-2"is used for the first and second compressors respectively.
  • Page 20 [ Structure specification of the frames (function menus) of the touch screen] Power on Standby screen Main screen Maintenance menu (for after-sale service personnel) Operating Tex data parameters Compressor data Evaporator data Condenser data Expansion valve data Water temperature Parameter setting Parameter setting setting Volume control...

  • Page 21: Setting And Operation Method Of Quantity Control

    7 Setting and Operation Method of Quantity Control 1. Setting method Implement the following settings on site. ➀Connection of the communication line Connect the control terminals No. 44 and 45 of water chilling units (up to 8 sets) in the same set with communication lines.
  • Page 22 ➄Sets the number of sets to be connected According to the number of chiller units set address in machine No.1 (host), set all the number of chiller units connected in the same group (including No.1). (Machines No.2-8 (sub-units) do not need set.) (No.1 machine (host)) Arrows aim at numbers ➅Confirmation method after setting...
  • Page 23 In addition, please connect the pump interlocking wiring for the blanket pump system according to the Recommended Connection Method in the figure below. This wiring can only be used when one water pump runs several chiller units. In addition, it should be noticed that when the No.
  • Page 24 (3) Pump operation command wiring (Essential) Continuous wiring ensures that each chiller unit can output pump operation signals. When adopting pump interlock, pump operation signal of all chiller units can be input in the operation of the system; When adopting the united pump interlock , only the wiring of machine No. 1 (host) is needed.(All machines need pump interlock wiring).
  • Page 25 (5) Liquid crystal setting Items that must be set for quantity control are listed as follows. Corresponding system Unit joint control Setting Initial Project setting Content All the numbers Range/Step value Quantity are on and off at control the same time Temperature The temperature difference (design temperature difference) of the 0 ～...

  • Page 26: Notes For Long-Term Stop

    8 Notes for Long-term Stop Check main points before rerunning Be sure to cut off the power supply before the check.。 Check main points before start of operation Items Check main points Remarks (1) Are dust and foreign matters removed? Tighten with a screwdriver or (2) Are screws and gaskets wrench...

  • Page 27: Start Of Operation

    Check points before of operation start Items Check main points Remarks (1) Can't it completely display, or Visual confirmation does it look unclear? (2) Are date and time correct? Visual confirmation Liquid crystal display (1) Does the fuse capacity meet Visual confirmation Fuse the requirements?
  • Page 28 Check points for a long time stop Items Check main points Remarks (1) Are dust and foreign matters removed? Tighten using a (2) Are screws and gaskets loose? screwdriver or wrench (3) Is the nameplate attached Appearance Visual confirmation falling off? and interior (4) Is the drain tank blocked? In case of rust, it should be...

  • Page 29: Maintenance Of Compressor

    11 For Better Use of The Machine Please plan in the usable range shown in the table below to ensure the safe use of the machine Usable range Type RCUF100WZY(-S) RCUF125WZY(-S) RCUF155WZY(-S) RCUF210WZY(-S) RCUF260WZY(-S) ℃...
  • Page 30 Type RCUF310WZY(-S) RCUF365WZY(-S) RCUF420WZY(-S) RCUF470WZY(-S) RCUF520WZY(-S) ℃ Cooling water outlet temperature 22~40(Page 26 Figure 1 Unit operation range) ℃ Cold water outlet temperature 4~15(Page 26 Figure 1 Unit operation range) Maximum flow 244.7 284.5 323.2 364.1 405.1 Cold water Minimum flow 94.4 110.1 125.9...
  • Page 31 Holding capacity The minimum holding capacity is the necessary amount of water for the continuous operation of water chiller for 5 minutes without load. This amount of water is the necessary amount of water to control the change rate of water temperature returned to the chiller. In the circulating waterway through the chiller, it is necessary to ensure a sufficient amount of water in the positions where the minimum amount of water is formed.

  • Page 32: Water Quality Management

    Water quality management Under severe water conditions, the copper used by the heat exchanger may be corroded, and incrustation can be attached to the inside of the heat exchanger, thus reducing the performance of the heat exchanger and even lead to failure. In order to prevent such accidents, please follow the values in the following table for management.
  • Page 33 Target of standard operating pressure Standard operating pressure (when operating at 100% capacity) indicating high pressure and low pressure The standard range diagram of the high pressure of the cooling water outlet temperature and the low pressure of the cold water outlet temperature is shown below. (Excluding the transitional period) Target of standard operating pressure The dirty heat exchanger will decrease the cooling capacity.
  • Page 34 Cooling water Venting plug Thermometer Pressure outlet valve gauge Flexible Venting plug joint Drain Pump gate One-way Flexible Drain Cooling Flexible Cooling water Filter plug valve valve inlet valve joint plug water pump joint Pressure Cold water Venting plug Thermometer Flexible gauge outlet valve...
  • Page 35 Precautions during usage Precautions for anti-freezing in winter In order to prevent the freezing of the circulating water and the damage of the heat exchanger when the operation of the chiller is stopped in winter, shall proceed the pipe insulation or install the heater on site, so as to prevent the circulating water from freezing, or discharge the circulating water in the chiller according to the said section "Discharge of Circulating Water"...
  • Page 36 Record of periodic fixed point inspection and operating conditions of the safety devices In order to ensure safety, keep the chiller in good operating conditions, and conduct independent spot inspection regularly and record the operating parameters. The following is the operation record card of the unit.

  • Page 37: Open

    12 Reset Method After The Protective Device is Open The protective device is activated to shutdown the chiller when the chiller is out of the usable range or when a fault occurs. If you want to re-run the chiller, it is necessary to exclude the startup cause of the protective device to reset the protective device. Refer to the table below for the name and startup value of the protective device and the main cause for startup.
  • Page 38 Failure of Pd3 Sensor (CN34) Failure of Ps2 Sensor (CN35) Failure of CT sensor (CN36) Abnormal terminal contact, disconnection and short circuit Activation of low oil level The oil level of the compressor is too low to trigger the alarm COMP Over Current The supply voltage is insufficient or instability of the voltage or the phase, the locked status of the compressor motor or insulation down...
  • Page 39 [Set value of safety protection and control device] RCUF100 RCUF125 RCUF155 RCUF210 RCUF260 RCUF310 RCUF365 RCUF420 RCUF470 RCUF520 Type WZY(-S) WZY(-S) WZY(-S) WZY(-S) WZY(-S) WZY(-S) WZY(-S) WZY(-S) WZY(-S) WZY(-S) High pressure control Manual reset and non-adjustable Cut-off MPa 1.38 1.38 1.38 1.38 1.38...
  • Page 40 Do not touch the protective device. A protective device and a printed circuit board are installed inside the chiller to Warning prevent accidents. When touching the device or changing its set values, a short circuit may occur, resulting in unit failure, electric shock, fire and even explosion, etc.
  • Page 41 Operation before the protective device is started (1)Protective control This unit sets the protection and control function which can make the unit have redundancy, and can prevent the unit stopping operation due to sudden alarm. Protective control is sometimes performed in accordance with the operating conditions, and sometimes performed when suspicious indications of the unit operation stopping due to an alarm.

  • Page 42: Specification

    The water side standard design pressure of the water side heat exchanger of the unit is 1.0MPa. If there are special pressure-bearing requirements, please contact Hitachi dealer. The client flange is shipped not attached and it is self-provided by the client.
  • Page 43 The water side standard design pressure of the water side heat exchanger of the unit is 1.0MPa. If there are special pressure-bearing requirements, please contact Hitachi dealer. The client flange is shipped not attached and it is self-provided by the client.

  • Page 44: Warranty And Service

    When signing a contract with the service company appointed by the company, the professional servicemen from Hitachi Chiller will replace the customer to provide maintenance service so that the unit is in good running state at any time. And the fault can be found in advance and properly handled before a large failure occurs.
  • Page 45 Client Record In order to facilitate future operations, please complete the following content and deliver to the customer to provide service for the customer in the future. Name of sales shop: Phone: Purchase date:(Year/Month/Day)
  • Page 46 Please contact your local agent, as the occasion arises. Hitachi’s liability shall not cover detects arising from the alternation performed by a customer without HITACHI's consent in a written form.

This manual is also suitable for:

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