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Installation, Operation and
Maintenance
YEWS High Efficiency Chiller With Single Compressor
The System is charged with refrigerant with a certain pressure
Improper operation during maintenance may cause serious damage to the system. All
maintenance shall be done by York authorized technician, following the guide in York
installation, operation and maintenance manual.
YEWS Water Cooled Screw Chiller
(Water Source Heat Pump)
Supersedes:
AP1105
-IOM01(0316)
EN
STYLE E
Warning
Form No:AP1105-IOM01(1216) EN
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Table of Contents
Related Manuals for Johnson Controls YEWS Series
Summary of Contents for Johnson Controls YEWS Series
- Page 1 YEWS Water Cooled Screw Chiller (Water Source Heat Pump) Installation, Operation and Supersedes: AP1105 Form No:AP1105-IOM01(1216) EN Maintenance -IOM01(0316) YEWS High Efficiency Chiller With Single Compressor STYLE E Warning The System is charged with refrigerant with a certain pressure Improper operation during maintenance may cause serious damage to the system. All maintenance shall be done by York authorized technician, following the guide in York installation, operation and maintenance manual.
- Page 2 YEWS-E Water Cooling Screw Chiller/Heat Pump IMPORTANT! READ BEFORE PROCEEDING! GENERAL SAFETY GUIDELINES This equipment is a relatively complicated apparatus. During installation, operation, maintenance or service, individuals may be exposed to certain components or conditions including, but not limited to: refrigerants, oils, materials under pressure, rotating components , and both high and low voltage.
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Page 3: Table Of Contents
YEWS-E Water Cooling Screw Chiller/Heat Pump TABLE OF CONTENTS NOMENCLATURE 1 GENERAL MANUFACTURER INFORMATION 1.1 INTRODUCTION 1.2 WARRANTY 1.3 SAFETY 1.4 RESPONSIBILITY FOR SAFETY 1.5 ABOUT THIS MANUAL 1.6 MISUSE OF EQUIPMENT 1.7 EMERGENCY SHUTDOWN 1.8 SAFETY LABELS 2 PRODUCT DESCRIPTION 2.1 INTRODUCTION 2.2 COMPRESSOR OIL SEPARATOR AND OIL SUMP... - Page 4 YEWS-E Water Cooling Screw Chiller/Heat Pump 4.10 CONDENSER COOLING WATER SYSTEM 4.11 VARIABLE PRIMARY FLOW 4.12 POWER WIRING 4.13 CONTROL PANEL WIRING 4.14 220VAC OUTPUT 4.15 SYSTEM INPUT 5 CONTROL CENTER 5.1 SAFETY NOTICE FOR THE OPERATION OF THE CONTROLLER 5.2 INITIALIZATION OPERATIONS 5.3 INSTRUCTIONS ON THE OPERATION 5.4 INSTRUCTIONS OF DISPLAY INTERFACE...
- Page 5 YEWS-E Water Cooling Screw Chiller/Heat Pump 8.7 EVACUATION AND DEHYDRATION OF UNIT 8.8 WORKING CONDITIONS 8.9 SCHEDULED MAINTENANCE 9 TROUBLE SHOOTING 9.1 SYSTEM TROUBLE SHOOTING ANALYSIS 9.2 SENSOR CALIBRATION CHARTS 10 TECHNICAL DATA 10.1 UNIT PHYSICAL PARAMETERS 10.2 WATER PRESSURE DROP 10.3 PHYSICAL DATAS 10.4 STARTING/OPERATION LIMITS OF UNIT 10.5 FOUNDATION DIAGRAM...
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Page 6: Nomenclature
YEWS-E Water Cooling Screw Chiller/Heat Pump 1 GENERAL MANUFACTURER INFORMATION serial number information is printed on the unit 1.1 INTRODUCTION identification plate. YORK YEWS chillers (heat-pumps) are manufactured to the highest design and construction standards to ensure The unit warranty will be void if any modification to the high performance, reliability and adaptability for all types of air conditioning installations. -
Page 7: About This Manual
YEWS-E Water Cooling Screw Chiller/Heat Pump Structural Support 1.5 ABOUT THIS MANUAL The following terms are used in this document to alert the Structural support of the unit must be provided as reader to areas of potential hazard. indicated in these instructions. Failure to provide proper support may result in injury to the operator, or damage to the equipment and/or building. -
Page 8: Emergency Shutdown
YEWS-E Water Cooling Screw Chiller/Heat Pump pressing the emergency stop switch removes the electrical gain access to the control panel or electrical enclosures during normal operation of the unit. supply the control system and the microprocessor controller, thus shutting down the unit. Refrigerants and Oils Refrigerants and oils used in the unit are generally non- 1.8 Safety Labels... -
Page 9: Product Description
YEWS-E Water Cooling Screw Chiller/Heat Pump 2 PRODUCT DESCRIPTION 2.1 INTRODUCTION YORK YEWS series chillers (Heat pumps) are designed The rotors are housed in a cast iron compressor housing for water cooling (heating) and to be located inside precision machined to minimize the void between the building (Equipment room). -
Page 10: Oil Separator And Oil Sump
YEWS-E Water Cooling Screw Chiller/Heat Pump position and provide a capacity control within 25%~100% 2.5 Condenser by using one continuous function slide valves. The water-cooled condenser is a cleanable shell and tube type, with 19mm thermally enhanced seamless copper The capacity control valve at the minimum load position tubes and a builtin subcooler. -
Page 11: Control Pannal
YEWS-E Water Cooling Screw Chiller/Heat Pump compressor overload protection module. seconds, the microprocessor will shut down and lock the chiller for fault if the current exceeds the current Compressor overload protection is achieved as following: setpoints. It is required to reset the system switch Motor protector sense the current of each phase of motor manually to eliminate the fault before restart the system. -
Page 12: Options
YEWS-E Water Cooling Screw Chiller/Heat Pump Compressor running hours and starting times. 2.11 OPTIONS YORK ISN building automation system can directly send Compressor running status. the communication signal to the standard control panel through the standard RS485 connection. System Suction/Discharge pressure, oil pressure, disch- arge temerature. - Page 13 YEWS-E Water Cooling Screw Chiller/Heat Pump YEWS-E SYSTEM FLOW CHART-1（for YEWS100H/130H/170H/200H/210H） Condenser with internal oil separator Compressor Oil Eductor Orifice Evaporator High pressure refrigerant line Low pressure refrigerant line Oil line...
- Page 14 YEWS-E Water Cooling Screw Chiller/Heat Pump ） YEWS-E SYSTEM FLOW CHART-2（for YEWS100P/130P/170P/200P /215P Condenser with internal oil separator Oil Filter Compressor Oil Eductor Orifice Evaporator High pressure refrigerant line Low pressure refrigerant line Oil line...
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Page 15: Transprortation, Handling And Storage
YEWS-E Water Cooling Screw Chiller/Heat Pump 3 TRANSPRORTATION, HANDLING AND STORAGE If the unit is stored longer than six months, the relative 3.1 DELIVERY AND STORAGE To ensure consistent quality and maximum reliability, all requirements for Long-Term Storage (50.20-NM9 /50.20- CL9 / 50.20-NM1) must be followed. - Page 16 YEWS-E Water Cooling Screw Chiller/Heat Pump RIGGING INSTRUCTION For liftin unit use spreader bar with 4 separate slings length of lifting elements must be adequate to clear all projections, the strength of liting elements must be suitable for lifing weight. Figure 3-1 Rigging...
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Page 17: Installation
YEWS-E Water Cooling Screw Chiller/Heat Pump 4 INSTALLATION A level floor, mounting pad or foundation must be pro-vided 4.1 General description by others, capable of supporting the operating wei-ght of the This instruction describes the installation of a model YEWS Rotory Scew Liquid Chiller/Heatpump. The unit is unit shipped as a single factory assembled, piped, wired and Clearances should be adhered to as follows:... - Page 18 YEWS-E Water Cooling Screw Chiller/Heat Pump Installing Option Spring Isolators In order to mount spring isolators, first remove the nuts and screws on the spring isolator supports. Before the unit is positioned, the isolator supports should be bolted to the unit support.
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Page 19: Piping Connections
YEWS-E Water Cooling Screw Chiller/Heat Pump ISOLATORS SPRING SYSTEM OPERATING WEIGHT PART NO Lbs. UP TO 3114 UP TO 6865 029W18479-001 3115 TO 4453 6866 TO 9818 029W18479-002 4454 TO 5526 9819 TO 12182 029W18479-003 5527 TO 6927 12183 TO 15272 029W18479-004 6928 TO 8288 15273 TO 18272... -
Page 20: Water Treatment
YEWS-E Water Cooling Screw Chiller/Heat Pump reducing the flow rate and causing potential damage to the 4.5 Water Treatment heat exchanger tubes. YORK recommends that a water The unit performance provided in the Design Guide is treatment specialist should be consulted to determine based on a fouling factor of (0.044m .℃... -
Page 21: Electrical Connection
YEWS-E Water Cooling Screw Chiller/Heat Pump the unit and its controls. D =1.447 x L 4.10 Condenser Cooling Water System Where: For YEWS-E units, condensers are usually piped in D =minimum pipe internal diameter in centimeters (cm) conjunction with a cooling tower. L =length of pipe in meters (m) With water cooled units it is necessary to control the condenser water flow and/or temperature into the condenser... -
Page 22: Variable Primary Flow
When the terminal 21 send out a 220VAC power, the water 4.11 Variable Primary Flow pump should be started.So the opening and stopping control Johnson Controls recommends a maximum 10% per of pump can be achieved by contactor and start/stop minute flow rate change, based on design flow, for program. -
Page 23: Control Center
YEWS-E Water Cooling Screw Chiller/Heat Pump 5 CONTROL CENTER It is required to adopt the specified cable for 5.1 Safety notice for the operation of the controller (1) “ Safety Notice” contains all important matters power supply. Please do not share the power with WARNING other electric appliance to avoid the danger due related with safety. - Page 24 YEWS-E Water Cooling Screw Chiller/Heat Pump network needs to run upon exchanging with another If firmware of YORK-003 is 1.07 and last versions,DIP control system network, it is required to be initialized. does not need to set in single system unit(Suitable for YEWS/100/130/170/200/210/215).
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Page 25: Instructions On The Operation
YEWS-E Water Cooling Screw Chiller/Heat Pump 5.3 Instructions on the operation (1) Instruction of HMI Keypad The unit will shut down when pressing this key. The unit will start up when pressing this key. It will return to the main interface upon pressing The fault happened can be inquired upon pressing 目... - Page 26 YEWS-E Water Cooling Screw Chiller/Heat Pump (2) Instruction of HMI Interface Note Symbol Description CN5(KEY BUS) Keyboard interface Download interface of ISP program CN6(ISP) A0 B0 : Communication interface with control board. A1 B1 : Communication interface with 485 communication port upper computer V0 : Common ground end Input the DC power of 10-24V, the end...
- Page 27 YEWS-E Water Cooling Screw Chiller/Heat Pump (3) Instruction of Control board Interface Symbol Description Note Connect according to the marked A, B, positive and CON2(COMU) 485 communication port negative terminal of power Common port of DI switch input The two COM ports are jointed together DI1–DI12 12 DI switch inputs in all DI switch input...
- Page 28 YEWS-E Water Cooling Screw Chiller/Heat Pump (b) Diagram of AI Analog signal input port +12V VCC AI16 0V VCC AI15 0V VCC AI14 0V VCC AI13 0V AI12 AI11 AI16 AI15 AI14 AI13 AI10 AI13-AI16 : Analog signal input, reisitance of each Instruction: port in grounded can be selected by jumper wire(maked : +5V power supply...
- Page 29 YEWS-E Water Cooling Screw Chiller/Heat Pump (5) Analog, digital, input/ouput definition (a) Definition of analog input/ouput Analog input Measuring scope and status description Leaving condenser liquid -19~99℃, fault once exceeding the scope Leaving heat liquid(heat pump) Enter condenser liquid -19~99℃, fault once exceeding the scope Enter heat liquid(heat pump) -19~99℃, fault once exceeding the scope Leaving evaporator liquid...
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Page 30: Instructions Of Display Interface
ON/OFF: Display the startup and stop status, which should be displayed as ON when unit is running, and be displayed as OFF while unit is standby. A JOHNSON CONTROLS COMPANY OPH&LIMT: Flash display the unit status, no display if WELCOME TO USE YORKCHILLER there is no relevant operation status. - Page 31 YEWS-E Water Cooling Screw Chiller/Heat Pump UNIT TYPE: AC/ITS/HP and the compressor executes to load. MINIMUM LOAD- Current of compressor motor is COMP STA: Compressor status,the displayed below minimum load setting, compressor executes to information is as follows: load. COMP OFF- The compressor is off. SAT.EVAP.T: Saturation temperature of the refrigerant in STOPPING- The compressor is stopping Evaporator.
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Page 32: Parameter Setting
YEWS-E Water Cooling Screw Chiller/Heat Pump the main board. AI16 CURRENT 18.0Amp RETU ON indicate the digital output is closed. PUMP DO2 MOTOR Y CONTACT (6)Status Display Interface-6 DO3 MOTOR △ CONTACT BACK Press F1 to return to the main interface. OIL HEATER Press F3 to return to the previous display interface. - Page 33 YEWS-E Water Cooling Screw Chiller/Heat Pump Press 0~ 9 to input the values for the digital type Parameter Setting Interface-1-b parameters. Input the operator password 9675 in the parameter setting interface-1-a, and press the key to confirm. For non-digital type parameters, press 0 or 8 to select (same as “...
- Page 34 YEWS-E Water Cooling Screw Chiller/Heat Pump The following interface is the parameter setting corresponding access password. There is four access level: “ VIEW” “ OPERATOR” “ SERVICE” interface-1-d, press F1 to enter into the setting interface, and “ FACTORY” . Input the password in the then the handlers will have the higher access level to set PASSWORD area by pressing the via the figure key, all the parameters.
- Page 35 YEWS-E Water Cooling Screw Chiller/Heat Pump Setting scope and default value of the parameters: SYS1 RUN CTRL. AUTO RUN MODE: AC/ITS/HP/REMOTE Default: AC SYS2 RUN CTRL. AUTO RESET FAIL: ----/SYS1/SYS2 Default: ---- RETU SYS1 CUR.OFFSET 100% CONTR.CYCLE: 5 ~ 60 s Default: 10s SYS2 CUR.OFFSET 100%...
- Page 36 YEWS-E Water Cooling Screw Chiller/Heat Pump SYS1 BYPASS CTRL. ： If SYS1 BYPASS CTRL. is Setting scope and default value of the parameter LEL TEMP SET: 4.0℃~15.0℃ Default: 7.0℃ set as AUTO, which should be controlled according to the LEL TEMP CR: 0.5℃~2.0℃...
- Page 37 YEWS-E Water Cooling Screw Chiller/Heat Pump Instructions for capacity control (AC mode for example) High temperature Loading Ts+D Holding Ts-D Unloading Ts-D-Db Emergency Stop temperature Ts： Leaving chilled water temperature setpoint (LEL TEMP SET ) D： Differential of Leaving chilled water temperature (LEL TEMP CR) Db：Differential buffering value When leaving chilled water temperature ≥(Ts + D), the compressor will load.
- Page 38 YEWS-E Water Cooling Screw Chiller/Heat Pump (6) Parameter Setting Interface-6 ≥ （OCC-5%）*MLA Compressor current Hold Press F1 to return to the parameter setting interface-3 ≥ Press F3 to return to the previous setting interface （OCC-4%）*MLA Compressor current Medium speed Unload Press F4 to enter into the next parameter setting interface ≥...
- Page 39 YEWS-E Water Cooling Screw Chiller/Heat Pump (8) Parameter Setting Interface-8 (10) Parameter Setting Interface-10 Press F1 to return to the parameter setting interface-3 Press F1 to return to the parameter setting interface-3 Press F3 to return to the previous setting interface Press F3 to return to the previous setting interface Press F4 to enter into the next parameter setting interface Press F4 to enter into the next parameter setting interface...
- Page 40 YEWS-E Water Cooling Screw Chiller/Heat Pump (12)Parameter Setting Interface-12 HOL START2: 00/00 00:00 RETU Press F1 to return to the parameter setting interface-3 HOL STOP2: 00/00 00:00 Press F3 to return to the previous setting interface HOL START3: 00/00 00:00 Press F4 to enter into the next parameter setting interface HOL STOP3: 00/00...
- Page 41 YEWS-E Water Cooling Screw Chiller/Heat Pump priority system to start, if the start priority is set to Setting scope and default of the parameter System1, the system1 is always a priority in the system2 START CONDITION 100~300% Default：120% to start . Only in the USE ONE SYSTEM set up for STOP CONDITION 100~300% Default：150%...
- Page 42 YEWS-E Water Cooling Screw Chiller/Heat Pump counters resetting is achived, for example, unit’ s accu- switch on the control panel, while if set MODBUS, its mulated operation hours and compressor’s accumulated startup and stop will be finished by the upper computer. operation hours.
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Page 43: Clock Setting
YEWS-E Water Cooling Screw Chiller/Heat Pump (18) Parameter Setting Interface-18 Press F1 to return to the parameter setting interface-3 RETU Press F2 to select whether it is allowed to be test or not. Press F3 to return to the previous setting interface 2006 - 00 -00 00:00:00 DIGITAL OUTPUT TEST... - Page 44 YEWS-E Water Cooling Screw Chiller/Heat Pump (4) Fault Inquiry 4 Select the difference series number by pressing the figure keys 0-9 so as to display the faults happened in Press F1 to return to the main interface the different time. The number 0-9 means the orders of Press F3 to return to the previous setting interface faults happened in the different time, the bigger numer means the earlier the faults happened.
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Page 45: General Parameters Setting And Defult Values
YEWS-E Water Cooling Screw Chiller/Heat Pump 5.5 General parameters setting and defult values (1) Sharing parameters setting and defult values -5.0 – +5.0℃ ECL OFFSET Service password 0℃ -5.0 – +5.0℃ LCL OFFSET 0℃ Service password 1 – 255 MODBUS ADDRESS Service password BATTERY BACKUP User password... - Page 46 YEWS-E Water Cooling Screw Chiller/Heat Pump (2) Assignable parameters setting and defult values (AC mode) Defult values Access level Items Setting range 7.0℃ User password LEL TEMP SET 4.0~15.0℃ 1.0℃ User password LEL TEMP CE 0.5~2.0℃ 2.0℃ Service password LOW LELT 1.0~7.0℃...
- Page 47 YEWS-E Water Cooling Screw Chiller/Heat Pump (4) Assignable parameters setting and defult values (HP mode) Setting range Items Defult values Access level LCL TEMP SET 45.0℃ 30.0~50.0℃ User password 1.0~2.5℃ CR BUFFER 2.5℃ User password 1.0℃ 0.5~2.0℃ User password LCL TEMP CE 1.0~7.0℃...
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Page 48: Fault Imformation
YEWS-E Water Cooling Screw Chiller/Heat Pump 5.6 Fault imformation Reset method Fault information Fault reason Communication disconnection between the centralized SYS1 COMM.FAULT Manual controller and 1# main board Flow switch open Auto SYS1 FLS OPEN SYS1 DIS.PRESSURE SW.OPEN System1 discharge pressure switch open Manual SYS1 OIL SW.OPEN System1 oil level switch open... -
Page 49: Modbus Protocol
YEWS-E Water Cooling Screw Chiller/Heat Pump 5.7 Modbus protocol (1) Modbus protocol instructions 9600 Baud rate Word length Parity None Stop bits Data mode verify (2) ModBus node list Address Functions Description Word length note Command 1:start, 2:stop Start/stop word Status 0:stop,1:start Mode select word... - Page 50 YEWS-E Water Cooling Screw Chiller/Heat Pump (3) Definition of fault information in ModBus protocol AI Sensor input fault Fault Leaving Cooling Liquid Temperature Sensor Failure bit0 bit1 Entering Cooling Liquid Temperature Sensor Failure bit2 Leaving Chilled Liquid Temperature Sensor Failure Entering Chilled Liquid Temperature Sensor Failure bit3 bit4...
- Page 51 YEWS-E Water Cooling Screw Chiller/Heat Pump DI switch input fault Fault bit0 Flow Switch Open bit1 bit2 High pressure Switch Open bit3 Oil level switch open bit4 Motor Protection Switch Open bit5 External Interlock Switch Open bit6 Start-up Failure bit7 bit8 bit9 bit10...
- Page 52 YEWS-E Water Cooling Screw Chiller/Heat Pump (4) Definition of digital input in ModBus protocol Switch Input Status bit0 FLOW SWITCH 0=open 1=close DISCHAGE PRESSURE SWITCH bit1 0=open 1=close bit2 HIGH PRESSURE SWITCH 0=open 1=close bit3 OIL LEVEL SWITCH 0=open 1=close bit4 MOTOR PROTECTION 0=open 1=close...
- Page 53 YEWS-E Water Cooling Screw Chiller/Heat Pump (6) How to monitor it remotely YEWS centralized controller XS08 supply a RS485 communicaiton port for users, hence, users are able to monitor the operation of chillers conveniently with it, and connect easily it to external integration system when connecting cable according to the MODBUS protocol.
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Page 54: Commissioning
YEWS-E Water Cooling Screw Chiller/Heat Pump 6 COMMISSIONING 6.1 PREPARATION Power Connections Commissioning of this unit should only be Check that the customer power cables are connected carried out by YORK Authorized personnel. correctly to the circuit breaker. Ensure that connections CAUTION of power cables within the panels to the circuit breaker Especially, this section must be read in conjunction with... - Page 55 YEWS-E Water Cooling Screw Chiller/Heat Pump The corresponding of concentrations and freezing points of glycol solution Freezing point℃ E.G wt% Freezing piont℃ E.G wt% -1.4 -7.8 -3.28 -11.38 -5.31 -14.04 The saturated temperature of R134a in difference pressure Saturated temperature ℃ Saturated temperature ℃...
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Page 56: First Time Start-Up
YEWS-E Water Cooling Screw Chiller/Heat Pump 6.2 FIRST TIME START-UP adverse conditions appeared during the compressor During the commissioning period there should be starting. Refer to instructions on the operation of control sufficient heat load to run the unit under stable System on section 5 for the normal operation process. -
Page 57: Operation
YEWS-E Water Cooling Screw Chiller/Heat Pump 7 Operation 7.1 General Description Once the compressor is running, the evaporated refrigerant The units are designed to work independently, or in vapor is pumped into the water cooled condenser, which conjunction with other equipment via a 485 communic- results in the rise of discharge pressure. -
Page 58: Other Notes
YEWS-E Water Cooling Screw Chiller/Heat Pump the the unit fail to load normarly. So refrigerant should be adjusted to a suitable amount(Ensure the discharge superheat temperature in the range of 6-10 ℃ in rating conditions) Fault treatment If the unit stop for fault, the operator should handle the fault in time, if it can not be solved, please contact the YORK service personnel immediately. -
Page 59: Running Detection
YEWS-E Water Cooling Screw Chiller/Heat Pump be power on when it is not running for a long period of temperature of the condenser so as to compare with those in time (The compressor oil heat is also powered on). the design situation. If the main power has to be cutout in a long period of 4. - Page 60 YEWS-E Water Cooling Screw Chiller/Heat Pump Yearly (or perform a more frequent inspection a. Inspect and clean the water drainage valve according to the requirement) b. Inspect and clean the pipes according to the requirements. 1. Clearly drain out and replace the oil in oil separator 3.
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Page 61: Maintenance
YEWS-E Water Cooling Screw Chiller/Heat Pump 8 MAINTENANCE 8.1 GENERAL REQUIREMENTS Periodic refrigerant leak checking must be part of a The units have been designed to operate continuously, comprehensive maintenance program. Leak check the provided they are regularly maintained and operated entire chiller using a calibrated electronic leak detector. -
Page 62: Compressor Oil
YEWS-E Water Cooling Screw Chiller/Heat Pump approach and refrigerant gas discharge superheat are at The YORK YEWS-E Chiller Compressors use rolling within the values listed in Table 8-1. element bearings (ball and roller bearings); no sleeve bearings are used. Oil analysis that include metals may A charging valve is located in the liquid line below the cause confusion when the results are compared to other evaporator. -
Page 63: Oil Filter
YEWS-E Water Cooling Screw Chiller/Heat Pump Oil Charging Procedure The oil should be charged into the oil separator using the YORK Oil Charging Pump. To charge oil, proceed as follows: 1. The unit should be shut down. 2. Immerse the suction connection of the oil charging pump in a clean container of new oil and connect the discharge conncetion to the compressor oil charging valve.Do not tighten the connection at the charging valve... - Page 64 YEWS-E Water Cooling Screw Chiller/Heat Pump The standard condenser tubes used in YORK YEWS-E Chemical Cleaning Procedure Chemical cleaning is an effective method to remove scale Chiller/Heat-Pump are internally enhanced copper tubes. from internally enhanced copper tubes. However, a company knowledgeable with the chemical cleaning procedure should If the equipment is located in an unheated area be contracted or consulted.
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Page 65: Checking System For Leaks
YEWS-E Water Cooling Screw Chiller/Heat Pump 6. Replace the water box gasket with a new gasket and After system is operated under load, the high pressure reassemble the water boxes onto the condenser. components should be carefully leak test with a leak detector to be sure all joins are tight. -
Page 66: Evacuation And Dehydration Of Unit
YEWS-E Water Cooling Screw Chiller/Heat Pump 5. When absolute tightness of the system has been 6. Hold the vacuum obtained in step3 in the system for 8 established, blow the mixture of refrigerant and nitrogen hours; the slighter rise in pressure indicates a leak or the through the charging valves pressure of moisture, or both. -
Page 67: Trouble Shooting
YEWS-E Water Cooling Screw Chiller/Heat Pump 9 TROUBLE SHOOTING 9.1 System Trouble Shooting Analysis Successful problem solving requires an organized approach to define the problem, indentify the cause,and make the proper correction. Sometimes it is possible that two relatively obvious problems combine to provide a set of symptoms that can mislead the troubleshooter. - Page 68 YEWS-E Water Cooling Screw Chiller/Heat Pump Cooling water temperature too low Low discharge superheat with low leaving Increase condenser water temperature cooling water temperature Jet or orifice of oil eductor clogged No notable temperature difference on the oil Change oil filter and oil eductor eductor Insufficient oil charge Oil level is low while the chiller operating in...
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Page 69: Sensor Calibration Charts
YEWS-E Water Cooling Screw Chiller/Heat Pump 9.2 Sensor Calibration Charts Chilled leaving liquid temperature, chilled return liquid temperature, leaving cooling liquid temperature, returning cooling liquid temperature sensors: ℃ Temperature Resistance KΩ 42.82 38.53 34.57 31.32 28.29 25.59 23.17 21.01 19.07 17.33 15.77 Temperature℃... -
Page 70: Technical Data
YEWS-E Water Cooling Screw Chiller/Heat Pump 10 TECHNICAL DATA 10.1 Unit physical parameters Connection Flange mm Unit Size mm Unit Model EVAP COND Length Width Height YEWS100 2595 1280 1820 YEWS130 3030 1280 1865 YEWS170 3055 1350 1865 YEWS200 3080 1430 1885 YEWS215... -
Page 71: Physical Datas
YEWS-E Water Cooling Screw Chiller/Heat Pump 10.3 Physical datas Water Water Refrigerant Refrigerant Lubrication Unit Shipping Operating volume per Volume per Circuit NO. Charge(kg) Charge (L) Capacity Weight Weight condenser L Evaporator L Control %100 25~100 2800 3200 YEWS100 25~100 3450 3950 YEWS130... - Page 72 YEWS-E Water Cooling Screw Chiller/Heat Pump ITS unit operation Range ITS unit starting Range Chilled Water Temp IN-℃ Chilled Water Temp IN-℃ HP unit staring Range HP unit operation Range Chilled Water Temp IN-℃ Chilled Water Temp IN-℃ Unit Starting Range Unit operating range Ⅰ...
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Page 73: Foundation Diagram
YEWS-E Water Cooling Screw Chiller/Heat Pump 10.5 Foundation Diagram Rubber Isolator Pad Layout Spring Isolator Layout Model A(mm) B(mm) C(mm) D(mm) YEWS100 1822 1280 2332 1368 YEWS130 2427 1280 2937 1368 YEWS170 2427 1350 2937 1438 YEWS200 2427 1430 2937 1518 YEWS215 3494... -
Page 74: Dimensions
YEWS-E Water Cooling Screw Chiller/Heat Pump 10.6 Dimensions D1/D2(mm) 2595 1280 1820 YEWS100 YEWS130/170/200/215 YEWS130 3030 1280 1865 YEWS170 3055 1350 1865 YEWS200 3080 1430 1885 YEWS215 4215 1620 2035... -
Page 75: Spare Parts
YEWS-E Water Cooling Screw Chiller/Heat Pump 11 SPARE PARTS All requests for parts should he made to your local York 11.1 Recommended Spares It is recommended that the following common spare parts Sales and Service Centre. are held for preventative of corrective maintenance 11.2 Recommended Compressor Oils operations. -
Page 76: Decommissioning,Dismantling And Disposal
YEWS-E Water Cooling Screw Chiller/Heat Pump 12 DECOMMISSIONING,DISMANTLING AND DISPOSAL 12.1 General description After draining, the water pipework can be disconnected Never release refrigerant to the atmosphere when and removed. emptying the refrigerating circuits. Suitable WARNING retrieval equipment must be used. If reclaimed Units can generally be removed in one piece after disconnection as above. -
Page 77: Installation Instructions For The Hf68 Flow Switches
YEWS-E Water Cooling Screw Chiller/Heat Pump 13 INSTALLATION INSTRUCTIONS FOR THE HF68 FLOW SWITCHES at both sides of which there MUST be a linear length 13.1 Application with at least five times of the pipe diameter. When a This switch, a SPDI type flow switch, is a kind of relay switch is installed, its wiring terminals must be used for inspecting and observing liquid flow. -
Page 78: Steps To Adjust The Flow Switch Settings
YEWS-E Water Cooling Screw Chiller/Heat Pump leads with the red one as the center line. When the flow 3. Press the main lever for a few times to ensure the flow increases, the red line contacts the yellow line; when the switch setting is no less than the EXW setting. - Page 88 Form No:AP1105-IOM01(1216) EN Supersedes:AP1105-IOM01(0316) EN...