Johnson Controls YEWS Series, YEWS100, YEWS200, YEWS210, YEWS130 Installation, Operation And Maintanance Instructions

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Supersedes:

AP1105

-IOM01(0316)

YEWS Water Cooled Screw Chiller

(Water Source Heat Pump)

Installation, Operation and Maintenance

Form No:AP1105-IOM01(1216) EN

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.

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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. Each of these items has the potential, if misused or handled improperly, to cause bodily injury or death. It is the obligation and responsibilities of operating/service personnel to identify and recognize these inherent hazards, protect themselves, and proceed safely in completing their tasks. Failure to comply with any of these requirements could result in serious damage to the equipment and the property in which it is situated, as well as severe personal injury or death to themselves and people at the site.

This document is intended for use by owner-authorized operating/service personnel. It is expected that this individual posseses independent training that will enable them to perform their assigned tasks properly and safely. It is essential that, prior to performing any task on this equipment, this individual shall have read and understood this document and any referenced materials. This individual shall also be familiar with and comply with all applicable governmental standards and regulations pertaining to the task in question.

In complying with YORK’ s policy for continuous product improvement, the information contained in this document is subject to change without notice. While YORK makes no commitment to update or provide current information automatically to the manual owner, that information, if applicable, can be obtained by contacting the nearest YORK Applied Systems Service office.

It is the responsibility of operating/service personnel to verify the applicability of these documents to the equipment in question. If there is any question in the mind of operating/service personnel as to the applicability of these documents, then prior to working on the equipment, they should verify with the owner whether the equipment has been modified and if current literature is available.

CHANGEABILITY OF THIS DOCUMENT

Nomenclature

Y E W 100 HEA 50

Design Level 50-380V-3P-50Hz

53-400V-3P-50Hz 55-415V-3P-50Hz 64-460V-3P-60Hz 62-230V-3P-60Hz

A-HFC134a H - High efficiency AC B - High efficiency ITS P - Premium efficiency AC

Unit Model

Screw Compressor

High Efficiency

YORK

Water Cooled

S -

Special Design

Heat Pump

YEWS-E Water Cooling Screw Chiller/Heat Pump

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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

2.3

2.4 REFRIGERANT CIRCUITS

2.5 CONDENSER

2.6 EVAPORATOR

2.7 POWER AND CONTROL PANEL

2.8 CONTROL PANNAL

2.9 MOTOR PROTECTION

2.10 KEYBOARD CONTROL

2.11OPTIONS

2.12 FUNCTIONAL DESCRIPTION

3 TRANSPRORTATION, HANDLING AND STORAGE

3.1 DELIVERY AND STORAGE

3.2 INSPECTION

3.3 RIGGING

4 INSTALLATION

4.1 GENERAL DESCRIPTION

4.2 LOCATION REQUIREMENTS

4.3 INSTALLATION OF VIBRATION ISOLATORS

4.4 PIPING CONNECTIONS

4.5 WATER TREATMENT

4.6 PIPEWORK ARRANGEMENT

4.7 CONNECTION TYPES &SIZES

4.8 REFRIGERANT RELIEF VALVE PIPING

4.9 ELECTRICAL CONNECTION

OIL SEPARATOR AND OIL SUMP

TABLE OF CONTENTS

YEWS-E Water Cooling Screw Chiller/Heat Pump

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4.10 CONDENSER COOLING WATER SYSTEM

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

5.4.1 INITIALIZATION INTERFACE

5.4.2 HOME INTERFACE

5.4.3 STATUS DISPLAY

5.4.4 PARAMETER SETTING

5.4.5 CLOCK SETTING

5.4.6 FAULT INQUIRY

5.5 GENERAL PARAMETERS SETTING AND DEFULT VALUES

5.6 FAULT IMFORMATION

5.7 MODBUS PROTOCOL

6 COMMISSIONING

6.1 PREPARATION

6.2 FIRST TIME START-UP

7 OPERATION

7.1 GENERAL DESCRIPTION

7.2 START-UP

7.3 NORMAL RUNNING AND CYCLING

7.4 OTHER NOTES

7.5 RUNNING DETECTION

8 MAINTENANCE

8.1 GENERAL REQUIREMENTS

8.2 DAILY MAINTENANCE

8.3 COMPRESSOR OIL

8.4 OIL FILTER

8.5 CONDENSER AND EVAPORATOR

8.6 CHECKING SYSTEM FOR LEAKS

4.11 VARIABLE PRIMARY FLOW

YEWS-E Water Cooling Screw Chiller/Heat Pump

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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

10.6 DIMENSIONS

11 SPARE PARTS

11.1 RECOMMENDED SPARES

11.2 RECOMMENDED COMPRESSOR OILS

12 DECOMMISSIONING,DISMANTLING AND DISPOSAL

12.1 GENERAL DESCRIPTION

13. INSTALLATION INSTRUCTIONS FOR THE HF68 FLOW SWITCHES

13.1 APPLICATION

13.2 PARAMETERS

13.3 FLOW ADJUSTMENT RANGE AND MEDIA TEMPERATURE RANGE

13.4 INSTALLATION

13.5 WIRING

13.6 STEPS TO ADJUST THE FLOW SWITCH SETTINGS

ATTACHED DRAWINGS 1: YEWS electrical drawing-compressor for 50Hz power

ATTACHED DRAWINGS 2: YEWS electrical drawing-main board (YEWS100H/130H/170H/200H/210H) for 50Hz power

ATTACHED DRAWINGS 3: YEWS electrical drawing-main board (YEWS215P) for 50Hz power

ATTACHED DRAWINGS 5: YEWS electrical drawing-compressor for 60Hz power

ATTACHED DRAWINGS 6: YEWS electrical drawing-main board (YEWS100H&130H&170H&200H) for 60Hz power

ATTACHED DRAWINGS 7: YEWS electrical drawing-main board (YEWS215P) for 60Hz power

ATTACHED DRAWINGS 8: YEWS field connection for 60Hz power

ATTACHED DRAWINGS 9: Transformer for230V/3P/60Hz Application

YEWS-E Water Cooling Screw Chiller/Heat Pump

ATTACHED DRAWINGS 4: YEWS electrical drawing-main board(YEWS100P/130P/170P/200P) for 50Hz power

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1 GENERAL MANUFACTURER INFORMATION

1.1 INTRODUCTION

YORK YEWS chillers (heat-pumps) are manufactured to

the highest design and construction standards to ensure

high performance, reliability and adaptability for all types

of air conditioning installations. The unit is intended for

cooling (hot) water solution and is not suitable for purp-

oses other than those specified in this manual.

This manual contains all the information required for cor-

rect installation and commissioning of the unit, together

with operating and maintenance instructions.

The manuals should be read thoroughly before attempting

to operate or service the unit. All procedures detailed in

the manuals, including installation, commissioning and

maintenance tasks must only be performed by suitably

trained and qualified personnel.

The manufacturer will not be liable for any injury or

damage caused by incorrect installation, commissioning,

operation or maintenance resulting from a failure to

follow the procedures and instructions detailed in the

manuals.

1.2 WARRANTY

YORK warrants all equipment and materials against

defects in workmanship and materials for a period of

eighteen (18) months from date of shipment, or twelve

(12) months from commissioning, whichever occurs first,

unless labor or extended warranty has been purchased as

part of the contract.

The warranty is limited to parts only replacement and

shipping of any faulty part, or sub-assembly, which has

failed due to poor quality or manufacturing errors. All

claims must be supported by evidence that the failure has

occurred within the warranty period, and that the unit has

been operated within the designed parameters specified.

All warranty claims must specify the unit model, serial

number, order number and run hours/starts. Model and

serial number information is printed on the unit

identification plate.

The unit warranty will be void if any modification to the

unit is carried out without prior written approval from

YORK.

For warranty purposes, the following conditions must be

satisfied:

The initial start of the unit must be carried out by trained

personnel from an Authorized YORK Service Centre.

Only genuine YORK approved spare parts, oils, coo-

lants, and refrigerants must be used. All the scheduled

maintenance operations detailed in this manual must be

performed at the specified times by suitably trained and

qualified personnel.

Failure to satisfy any of these conditions will automa-

tically void the warranty. See Warranty Policy.

1.3 SAFETY

YEWS chillers are designed and manufactured by the

factory within ISO 9000 , Chillers satisfied all the runn-

ing limits required by the manual and conform to the following Directives GB25131《 Safety requirements of Positive displacement and Centrifugal Water— chilling Packages》

1.4 RESPONSIBILITY FOR SAFETY

Every care has been taken in the design and manufacture

of the unit to ensure compliance with the safety requir-

ements listed above. However, the individual operating or

working on any machinery is primarily responsible for:

Personal safety, safety of other personnel, and the

machinery.

Correct utilization of the machinery in accordance with

the procedures detailed in the manual.

YEWS-E Water Cooling Screw Chiller/Heat Pump

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1.5 ABOUT THIS MANUAL

The following terms are used in this document to alert the

reader to areas of potential hazard.

A WARNING is given in this document to

identify a hazard, which could lead to personal

injury. Usually an instruction will be given, tog-

ether with a brief explanation and the possible

result of ignoring the instruction.

A CAUTION identifies a hazard which could

lead to damage to the machine, damage to other

equipment and/or environmental pollution.

Usually an instruction will be given, together

with a brief explanation and the possible result

of ignoring the instruction.

A NOTICE is used to highlight additional

information, which may be helpful to you but

where there are no special safety implications.

The contents of this manual include suggested best

working practices and procedures. These are issued for

guidance only, and they do not take precedence over the

above stated individual responsibility and/or local safety

regulations.

This manual and any other document supplied with the

unit are the property of YORK which reserves all rights.

They may not be reproduced, in whole or in part, without

prior written authorization from an authorized YORK

representative.

1.6 MISUSE OF EQUIPMENT

Suitability for Application

The unit is intended for cooling water and is not suitable

for purposes other than those specified in these

instructions. Any use of the equipment other than its

intended use, or operation of the equipment contrary to

the relevant procedures may result in injury to the

operator, or damage to the equipment. The unit must not

be operated outside the design parameters specified in

this manual.

Structural Support

Structural support of the unit must be provided as

indicated in these instructions. Failure to provide proper

support may result in injury to the operator, or damage to

the equipment and/or building.

Mechanical Strength

The unit is not designed to withstand loads or stresses

from adjacent equipment, pipework or structures.

Additional components must not be mounted on the unit.

Any such extraneous loads may cause structural failure

and may result in injury to the operator, or damage to the

equipment. The unit should only be lifted in accordance

with the instructions given in Section3 of this manual.

General Access

There are a number of areas and features, which may be a

hazard and potentially cause injury when working on the

unit unless suitable safety precautions are taken. (It is

important to ensure access to the unit is restricted to

suitably qualified persons who are familiar with the

potential hazards and precautions necessary for safe oper-

ation and maintenance of equipment containing high

temperatures, pressures and voltages.)

Pressure Systems

The unit contains refrigerant vapor and liquid under

pressure, release of which can be a danger and cause

injury.

The user should ensure that care is taken during

installation, operation and maintenance to avoid damage

to the pressure system. No attempt should be made to gain

access to the component parts of the pressure system

other than by suitably trained and qualified personnel.

Electrical

The unit must be earthed. No installation or maintenance

work should be attempted on the electrical equipment

without first switching power OFF, isolating and locking-

off the power supply. Servicing and maintenance on live

equipment must only be performed by suitably trained

and qualified personnel. No attempt should be made to

CAUTION

NOTE

WARNING

YEWS-E Water Cooling Screw Chiller/Heat Pump

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gain access to the control panel or electrical enclosures

during normal operation of the unit.

Refrigerants and Oils

Refrigerants and oils used in the unit are generally non-

toxic, nonflammable and noncorrosive, and pose no spe-

cial safety hazards. Use of gloves and safety glasses is,

however, recommended when working on the unit. The

build up of refrigerant vapor, from a leak for example,

does pose a risk of asphyxiation in confined or enclosed

spaces and attention should be given to good ventilation.

High Temperature and Pressure Cleaning

High temperature and pressure cleaning methods (e.g.

steam cleaning) should not be used on any part of the

pressure system as this may cause operation of the

pressure relief device(s). Detergents and solvents, which

may cause corrosion, should also be avoided.

1.7 Emergency Shutdown

In case of emergency, the control panel is fitted with an

emergency stop switch (red)which, when operated by

pressing the emergency stop switch removes the electrical

supply the control system and the microprocessor

controller, thus shutting down the unit.

1.8 Safety Labels

The following labels are fixed to each unit to give

instruction, or to indicate potential hazards which may

exist.

White symbol on blue background For safe

operation, read the Instructions firstly.

Black symbol on yellow background Warning:

Hot surface

Black symbol on yellow background Warning:

Isolate all electrical sources of supply before

opening or removing the cover, as lethal voltages

may exist

Black symbol on yellow background General

attention symbol

YEWS-E Water Cooling Screw Chiller/Heat Pump

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2.1 INTRODUCTION

YORK YEWS series chillers (Heat pumps) are designed

for water cooling (heating) and to be located inside

building (Equipment room).

2.2 COMPRESSOR

A semi-hermetic screw compressor is provided to ensure

high operational efficiency and reliable performance.

Capacity control is achieved through slide valve. The

compressor is a positive displacement type characterized

by two helically grooved rotors, which are manufactured

from forged steel. The motor operator operates at 50Hz or

60Hz to directly drive the male rotor, which in turn drives

the female rotor on the light film of oil.

Each compressor is direct drive, semi-hermetic, rotary

twin screw type and includes the following items:

Two screw rotors, manufactured from forged steel.

A cast iron compressor housing precisely machined.

A built-in high efficient oil separator

An internal discharge check valve can prevent rotor

backspin during shutdown.

A suction vapor cooled, high efficient and reliable semi-

hermetic motor has overload protection: thermistor and

current overload protection.

A suction vapor screen and a serviceable oil filter are

installed in the compressor housing. For YEWS P serie

units, the oil filter is placed on the oil supply line.

Refrigerant vapor is sucked into the void created by the

unmeshing of the five lobed male and six lobed female

rotors. Further meshing of the rotors closes the rotor

threads to the suction port and progressively compresses

the vapor in an axial direction to the discharge port. The

vapor is compressed in volume and increased in pressure

before exiting at a designed volume at the discharge end

of the rotor casing. Since the intake and discharge cycles

overlap, a resulting smooth flow of vapor is maintained.

2 PRODUCT DESCRIPTION

The rotors are housed in a cast iron compressor housing

precision machined to minimize the void between the

housing and the rotors. Contact between the male and

female rotor is primarily rolling on a contact band on each

of the rotor's pitch circle. It result in virtually no rotor

wear and increased reliability.

The compressor incorporates a complete antifriction bear-

ing design for reduced power input and increased relia-

bility. Four separated, cylindrical, roller bearings handle

radial loads. Angular-contact ball bearings handle axial

loads. Together they maintain accurate rotor positioning at

all pressure ratios, thereby minimizing leakage and maint-

aining efficiency.

Motor cooling is provided by refrigerant vapor from the

evaporator flowing across the motor. Over load protection

includes overheat and current overload protections.

For YEWS H serie units, oil is removed from the

refrigerant using a built-in oil separator, and then returned

back to the compressor for lubrication. A plug-in heater

and a float ball type oil level swithch are located in the

compressor.

Motor Starting

Star/Delta (S/D) open transition starter is used for

compressor motor starting. The S/D starter utilizes 3

motor contactors and a starting relay. The starter allows

inrush current to be limited to approximately 33%LRA for

the first 4~10 seconds, with current changing to normal

running current when the Delta connection is established.

When the microprocessor initiates a start signal to run a

compressor, the applicable relays are energized. The tran-

sition of the relay contacts enables the 'Star' connection of

the motor start. The 'Star' connection of the motor start is

enabled for 4~10 seconds, then motor switchs to the

'Delta' connection.

Capacity Control

The compressors should start at the minimum load

YEWS-E Water Cooling Screw Chiller/Heat Pump

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position and provide a capacity control within 25%~100%

by using one continuous function slide valves.

The capacity control valve at the minimum load position

when it starts up will ensure compressor starting at the

minimum motor load.

2.3 Oil separator and oil sump

YEWS system uses two stage oil separation designs, the

first stage is the compressor built-in oil separator, and the

second stage is the condenser internal oil separator. For

YEWS H serie units, all models has the oil sump located

in the first stage oil separator, the oil level should be

visible in the sight glass on compressor; but for YEWS P

serie units, the oil sump is located in the second stage oil

separator, there should be no visible oil level in the

compressor sight glass (the oil will be piped to the oil

sump inside the condenser).

All lubricant must flow through a renewable filter before

it is supplied to compressor to lubricate the bearings and

the rotors.

After lubricating the bearings, the oil is injected through

an orifice loacted in the closed thread near the suction end

of the rotors. The oil is automatically injected because of

the pressure difference between the discharge pressure and

the pressure at the suction end of the rotors. This

lubricates the rotors as well as provides an oil seal against

leakage around the r otors to assure r efrig erant

compression (volumetric efficiency).

For YEWS P serie units, a photoelectric type oil level

switch is used， and an oil heater are locaded on the oil

sump.

2.4 Refrigerant Circuits

The refrigerant circuit has a compressor, oil separator,

evaporator, condenser and a liquid line. Liquid line

components include: a manual shut-off valve, throttle

device , liquid injection piping (just for HP and ITS).

2.5 Condenser

The water-cooled condenser is a cleanable shell and tube

type, with 19mm thermally enhanced seamless copper

tubes and a builtin subcooler.

The design working pressure is 1.0MPa (gauge) on the

waterside. Flange connection HG20615 is provided for

water piping. The condenser shell is equipped with a

relief valve whose active pressure is 20.7 Bar. The

condenser is manufactured and tested according to China

National Standard GB151.

For HP unit, the external surface of the condenser shell

should be covered with 19mm-thick flexible closed-cell

foam for heat insulation purpose.

2.6 Evaporator

The evaporator is a shell and tube, falling film type heat

exchanger equipped with a relief valve whose active

pressure is 20.7 Bar.

The evaporator is manufactured and tested according to

China National Standard GB151.

The external surface of the evaporator shell is covered

with 19mm-thick flexible closed-cell foam for AC&HP

unit and 38mm us used for ITS unit. The water box

connection is equipped with HG20615 flanges for easier

connecting.

2.7 Power and Control Panel

All controls are factory-wired and function tested. The

panel enclosures are designed according to IP22 and are

manufactured from powder-painted steel.

The panel is divided into power supply section, control

section and start section. Power supply section and

control section have separated hinged, latched, and gasket

sealed doors.

The power panel contains: compressor starting contactor,

control wiring, compressor contacting solenoid and

YEWS-E Water Cooling Screw Chiller/Heat Pump

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compressor overload protection module.

Compressor overload protection is achieved as following:

Motor protector sense the current of each phase of motor

current and the temperature of motor, and send

corresponding signals to the I/O Board.Then compare the

values with MLA setpoints and active to protect the motor

once the the values is higher than MLA setpoints.It

protects the compressor motors from damage due to:

Current overload, current imbalance (the error of the

current of each phase), miswire, motor over temperature,

uncalibrated, supply power phase loss.

The control panel include: Microcomputer keyboard, HMI

and microprocessor board.

2.8 Control panel

The HMI consists of a liquid crystal display, with light

emitting diode backlighting for outdoor viewing of

operating parameters and program points. It can display 8

rows and 120 characters in 2 languages (English or

Chinese). The keyboard has 20 keys, which is divided into

two kinds: Funtion keys and Programme keys.

The standard control function of microprocessor board

includes: chiller alarm contactor controlling, chilled water

pump controlling, chiller auto resetting when it is repower

on after a period of power off, optimizing the system

automaticly according to the running conditions

Unit operating firmware is stored in non-volatile memory

(Flash Memory) to protect chiller from failture for power

off. All field programmed setpoints are retained in the

EPROM register. A lithium battery backed real time clock

(RTC) supply the clock for the system control, and the

battery has 3 years memory.

2.9 Motor protection

The microprocessor provides the overcurrent protection to

ensure that the motor is free from the damages due to

excessive voltage and other overcurrent problems.

After the Star/Delta starter started for more than 10

seconds, the microprocessor will shut down and lock the

chiller for fault if the current exceeds the current

setpoints. It is required to reset the system switch

manually to eliminate the fault before restart the system.

And prior to start the chiller which stopped due to

overcurrent, chec-king should be done on the motor,

wiring and refrigerant system.

When it is found that the current is lower than 10% of

MLA (Max Loading Amps), the low current protection

will be initiated and the unit should be stopped. In that

case, prior to restart the system, unit resetting should be

done manually.

Motor protector

Motor protector is used to protect motor from overheat,

There are three PTC (Positive Temperature Coefficient)

thermistor installed in each phase of motor winding. The

resistance of thermistor will keep in 1K when the temperature is lower than 125℃, however, the resistance

of thermistor will increase as its temperature rise. When

the resistance value of sensor reach upto 13K, the motor

protector will be active and cut off the power supply of

motor. The chiller is not allowed to restart until the motor

is cooled down and the resistance value of sensor drop

down to 3.25K.

2.10 Keyboard control

Display

The parameters of each refrigerant circuit can be

displayed in 2 languages (English or Chinese),

All the displayed parameters are listed as follows:

Entering/Leaving chilled water temperature

Entering/Leaving cooling water temperature(Entering/le-

aving hot water temperature are diaplayed in heatpump

mode).

Time and date, start and stop time at ordinary days,

arrangement on holidays and status of manual setting.

YEWS-E Water Cooling Screw Chiller/Heat Pump

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Compressor running hours and starting times.

Compressor running status.

System Suction/Discharge pressure, oil pressure, disch-

arge temerature.

Percentage of compressor current to Full Load Amps.

Cutout value and setpoints: Leaving Chilled (Hot) Water

Temperature, Low Evaporator Pressure , High Discharge

Temperature/Pressure , High/Low Amps , Low Chilled

Water Temperature , High Diacharge Pressure Unload,

High Compressor Amps unload.

Input

Setting the chilled (hot) water temperature.

Clock

Setting time, daily and holiday start/stop schedule.

Programming

Cutout setpoints: Low Evaporator pressure, High

Discharge Pressure, Low Evaporator temperature, High

Discharge Temperature, High Discharge pressure

unloading, OCC.

2.11 OPTIONS

YORK ISN building automation system can directly send

the communication signal to the standard control panel

through the standard RS485 connection.

Flow Switch

The gate type water flow switch has 10.3 bar DWP, which

is applicable to chilled water and cooling water lines.

25mm Spring Isolators

Level adjustable, spring and cage type isolators for

mounting under the unit base rails (Field mounted).

2.12 Functional Description

Low pressure liquid refrigerant enters the cooler and is

evaporated and superheated by the heat energy absorbed

from the chilled water passing through the cooler tube.

These low pressure vapor is sucked by the compressor

where the pressure and temperature are increased. The

high pressure and temperature refrigerant vapor combined

with oil is discharged into the oil separator, there, most of

the oil is separted and remaind in the oil reservoir. The oil

free vapor then enter the condenser and is condensed. The

fully condensed and subcooled liquid refrigerant then

enters the expansion valve where pressure reduction and

further cooling takes place before returning to the cooler.

YEWS-E Water Cooling Screw Chiller/Heat Pump

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YEWS-E Water Cooling Screw Chiller/Heat Pump

YEWS- E SYSTEM FLO W CHA RT-1（for YEWS100H/130H/170H/200H/210H）

High pressure refrigerant line Low pressure refrigerant line

Oil line

Condenser

with internal oil separator

Compressor

Oil Eductor

Orifice

Evaporator

Page 14

YEWS- E SYSTEM FLO W CHA RT-2（for YEWS100P/130P/170P/200P ）/215P

YEWS-E Water Cooling Screw Chiller/Heat Pump

Condenser

with internal oil separator

Compressor

Oil Eductor

Orifice

Evaporator

Oil Filter

High pressure refrigerant line Low pressure refrigerant line

Oil line

Page 15

3 TRANSPRORTATION, HANDLING AND STORAGE

3.1 DELIVERY AND STORAGE

To ensure consistent quality and maximum reliability, all

units are tested and inspected before leaving the factory.

The chiller may be ordered and shipped in any of the

following forms:

Form 1 (shipped complete)

Form 2 (shipped without refrigerant charge)

Units are containing nitrogen or refrigerant and YORK “ L” oil （ YORK “ W” oil in HP units） under

pressure. Units are shipped without export crating unless

crating has been specified on the Sales Order.

If the unit is to be put into storage, prior to installation, the

following precautions should be observed:

Ensure that the unit is not exposed to rain.

Ensure that all openings, such as water connections, are

securely capped.

The unit should be stored in a location where there is

minimal activity to limit the risk of accidental physical

damage.

To prevent inadvertent operation of the pressure relief

devices the unit must NOT be hot water or steam cleaned.

It is recommended to let the functionary on the storage

site keep the key of the control board.

It is recommended that the unit be periodically inspected

during storage.

If the unit is stored longer than six months, the relative

requirements for Long-Term Storage (50.20-NM9 /50.20-

CL9 / 50.20-NM1) must be followed.

3.2 INSPECTION

The unit shipment should be checked on arrival to see that

all major pieces, boxes and crates are received. Each unit

should be checked on the trailer or rail car when received,

before unloading, for any visible signs of damage. Any

damage of signs of possible damage must be reported to the

transportation company immediately for their inspection.

When received at the job site,all containers should be

opened and the contents checked against the packing list.

Any material shortage should be reported to YORK

immediately.

3.3 RIGGING

Each unit has four lifting holes(two on each end) in the end

sheets which should be used to lift the unit. Care should be

taken at all times during rigging and handling to avoid

damage to the unit and its external connections. Lift only

using holes shown in Figure 3-1.

If optional shipping skids are used, remove them before

lowering the unit to its mounting position. Rig the uni to its

final location on the floor or mounting pad by lifting the

unit (or shell assembly) with an overhead lift and lower the

unit to its mounting position.

Don't move the unit on rollers, nor lift it by forklift.

CAUTION

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 16

Figure 3- 1 Rigging

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.

Page 17

4 INSTALLATION

4.1 General description

This instruction describes the installation of a model YEWS Rotory Scew Liquid Chiller/Heatpump. The unit is shipped as a single factory assembled, piped, wired and nitrogen or refrigerant charged package, requiring a minimum of field labor to make chilled water connections, condenser water connections, refrigerant atmospheric relief connections, and electrical power connections.

Acording the requirement of bargain, YORK representative should provide the following service: Installation checking and, Initial starting and so on.

The YORK Warranty will be voided if the following restrictions are not adhered to:

1. No valves or connections should be opened under any circumstances because such action will result in loss of the factory charged refrigerant or nitrogen.

2. Do not dismantle or open the Unit for any reason except under the supervision of a YORK representative.

3. Do not make final power supply connections to the compressor motor or control panel.

4. Do not charge the compressor with oil.

5. Do not attempt to start the system.

6. Do not supply the evaporator with hot water(The temperature Limit is 100 F,38℃)or steam.

4.2 Location Requirements The unit should be located in an indoor location where temperature ranges from 4℃~ 43℃.The altitude shoude be less than 2000 meter.

The units are furnished with neoprene vibration isolator mounts for basement or ground level installations. Unit may by located on upper floor levels providing the floor is capable of supporting the total unit operating weight (in this application, the spring isolator is prefered).

A level floor, mounting pad or foundation must be pro-vided by others, capable of supporting the operating wei-ght of the unit

Clearances should be adhered to as follows: Rear, Ends and Above Unit - 610mm Front of Unit - 914mm Tube Removal - See following table

Model Tube removal space YEWS100 2100mm YEWS130/170/200/210 2650mm YEWS215 3800mm

4.3 Installation of Vibration Isolators

The optional vibration isolators can be loose shipped with the chiller.

Please refer to the foundation figures in Section 10 to decide proper installation position for the units.

Fixation-Installation

There are two methods: rubber pad and spring isolator.

Locating and installing isolator pads

The isolator pads should be located in accordance with the floor layout of the dimensional product drawing. After the isolator pads have been placed into position on the floor, lower the unit onto the pads. Make sure the pads are even with the edges of the mounting feet. When the unit is in place, remove the rigging equipment and check that the chiller is level, both longitudinally and transversely. See the following Fig.

The longitudinal alignment of the unit should be checked by placing a level on the top center of the evaporator shell under the compressor. Transverse alignment should be checked by placing a level on top of the shell end sheets at each end of the unit.

The unit should be level within 6.4mm from one end to the other end and from front to rear. If the chiller is not level within the amount specified, lift it and place shims between the isolation pad and the tube sheets.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 18

YEWS-E Water Cooling Screw Chiller/Heat Pump

SYSTE M OPERATING WEIGHT

UP TO 7423

Lbs.

UP TO 16365

PART NUMBER

028W1 4462-000

Checking the Isolator Pads Deflection

All isolator pads should be checked for the proper deflection

while checking the level of the unit. Each pad should be

deflected approximately 4 mm (0.15"). If an isolator pad is

under deflected, shim should be placed between the unit

tube sheet and the top of the pad to equally deflect all pads.

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. Position the 4 spring isolators, screw out the

adjusting screws on each isolator until they reach out to

match the isolator support holes. Then lower down the unit

on the adjusting screws. See the following Fig.

The leveling bolts should now be rotated one (1) turn at a

time, in sequence, until the unit end sheets are clear of the

floor or foundation by 22 mm (7/8") and the unit is level.

Check that the unit is level, both longitudinally and

transversely. If the leveling bolts are not long enough to level

unit due to an uneven or sloping floor or foundation, steel

shims (ground, if necessary) must be added beneath the

isolator assemblies as necessary.

After the unit is leveled, wedge and shim under each corner

to solidly support the unit in this position while piping

connections are being made, pipe hangers adjusted and

connections checked for alignment. Then the unit is filled

with water and checked for leaks. The leveling bolts should

now be finally adjusted until the wedges and shims can be

removed the unit should now be in correct level position,

clear of the floor or foundation and without any effect from

the weight of the piping.

Page 19

4.4 Piping Connections General Requirements

The following piping recommendations are intended to ensure satisfactory operation of the unit. Failure to follow these recommendations could cause damage to the unit, or loss of performance, and may invalidate the warranty.

The maximum flow rate and pressure drop for the evaporator and condenser must not be exceeded at any time. Refer to Section 10 for details.

A flow switch must be directly in series with the evaporator/ condenser and wired back to the control panel using screened cable. For details refer to Electrical Connection .This is to prevent damage to the evaporator/ condenser caused by inadequate liquid flow. A paddle type flow switches are suitable for 10 bar working pressure.

The chilled water pump should be installed in the entering water pipe. Pipework and fittings must be separately supported to prevent any loading on the unit. Flexible connections are recommended which will also minimize transmission of vibrations to the building. Flexible connections must be used if the unit is mounted on antivibration mounts as some movement of the unit can be expected in normal operation.

Pipework and fittings immediately next to the evaporator should be readily dismantled to enable cleaning prior to operation, and to facilitate visual inspection of the heat exchanger nozzles.

A strainer must be mounted on the waterside of the evaporator and condenser respectively, preferably of 40 meshes, fitted as close as possible to the liquid inlet connection, and provided with a local water cut-off switch.

The evaporator must not be exposed to too high flushing velocities or debris deposited during flushing. It is recom-

mended that a suitably sized by-pass and valve arrang-ement be installed to allow flushing of the pipework sys-tem. The by-pass can be used during maintenance to isol-ate the evaporator without disrupting flow to other units.

Thermometer and pressure gauge connections should be provided on the inlet and outlet connections of the evaporator and condenser.

Drain and vent valves (by others) should be installed in the connections provided in the cooler and condenser liquid heads. These connections may be piped to drain if desired.

Any debris left in the water piping between the strainer and cooler could cause serious damage to the tubes in the cooler and must be avoided. The installer/user must also ensure that the quality of the water in circulation is adequate, without any dissolved gases, which can cause oxidation of steel parts within the cooler.

Fig 4-1 Diagram of cooling water and chilled water pipe connection

YEWS-E Water Cooling Screw Chiller/Heat Pump

CAUTION

ISOLATORS SPRING

UP TO 3114

3115 TO 4453

4454 TO 5526

5527 TO 6927

6928 TO 8288

SYSTE M OPERATING WEIGHT

Lbs.

UP TO 6865

6866 TO 9818

9819 TO 12182

12183 TO 15272

15273 TO 18272

029W18479-001

029W18479-002

029W18479-003

029W18479-004

029W18480-001

PART NO

Page 20

Quality requirement of water used in chiller

Name PH value(25℃) Conductivity(25℃) Chloridion Sulphate ion Acid wastage Total Hardness Calcium Hardness SiO

Unit

μs/cm

mg/L mg/L mg/L mg/L mg/L mg/L

6.5～8.0

＜800 ＜200 ＜200 ＜100 ＜200 ＜150

＜50

Corrosion

X X

Target

Allowable value

Fouling

Notes:

1. The user should make regular inspections on the water

quality before installation and in the process of using. If the

water quality does not meet the demands of using, the heat-

exchange tubes will be in the danger of fouling ,corrupting and even leakage when using the “Defective” water for

long term.

2. Corrupting testing about the influence of using “Defective” water whose qulity exeed the limits for long term

shows that, the chiller will fail to run normally due to the

heat-exchange tubes corrupting and leakage.

3. Fouling testing about the influence of using“ Defective” water whose qulity exeed the limits for long term

shows that, the chiller will has a decreaing on capacity due

to the heat-exchange tubes fouling.

4. The water should be drained out if the unit will stop for a

long time, it is suggested that the heat exchanging pipe

should be cleaned after each long-term stop.

5. User should be responsibility for the loss caused by the

poor water quality.

4.6 Pipework Arrangement

The following are suggested pi4pework arrangements for

single unit installations. For multiple unit installations, each

unit should be piped as per relative drawings.

4.7 Connection Types &Sizes

Please refer to Section 10 for connection sizes of each

model.

The piping connections of evaporator and condenser are

HG20615 welded flanges.

4.8 Refrigerant Relief Valve Piping

The evaporator and condenser are each protected against

internal refrigerant overpressure by refrigerant relief valves.

It is recommended that each valve should be piped to the

exterior of the building so that when the valve is activated

the release of high pressure gas and liquid cannot be a

danger or cause injury.

The size of any pipework attached to a relief valve must be of sufficient diameter so as not to cause resistance to the operation of the valve. Unless otherwise specified by local regulations, the internal diameter depends on the length of pipe required and is given by the following formula:

YEWS-E Water Cooling Screw Chiller/Heat Pump

4.5 Water Treatment

The unit performance provided in the Design Guide is

based on a fouling factor of (0.044m .℃ /KW for

condenser and 0.0176m .℃ /KW for evaporator). Dirt, scale, grease and certain types of water treatment will adversely affect the heat exchanger surfaces and therefore the unit performance. Foreign matter in the water system(s) can increase the heat exchanger pressure drop,

reducing the flow rate and causing potential damage to the heat exchanger tubes. YORK recommends that a water treatment specialist should be consulted to determine whether the proposed water composition will adversely affect the evaporator materials of carbon steel and copper. The pH value of the water flowing through the evaporator must be kept in a range between 6.5 and 8.0. The water quality of chiller should be in accordance with local code.

Page 21

D =1.447 x L

Where: D =minimum pipe internal diameter in centimeters (cm)

L =length of pipe in meters (m)

If relief pipework is common to more than one valve, its cross sectional area must be at least the total required by each valve. Valve types should not be mixed on a common pipe. Precautions should be taken to ensure that the exit of relief valves/vent pipe remain clear of obstructions at all times.

4.9 Electrical Connection

YEWS product is suitable for 60Hz application, but the compressor can only be applied to 460V/60Hz, when the field power supply is 230V/60Hz, the transformer is necessary to make the chiller operation (the transformer will be shipped along with the chiller). And YEWS product control panel can only provide 220VAC power, please check if the equipment connected to the control panel is suitable for 220VAC voltage.

Please refer electrical drawingsfor 60Hz powerto find the details for field power connection.

The following connection recommendations are intended to ensure safe and satisfactory operation of the unit. Failure to follow these recommendations could cause harm to persons, or damage to the unit, and may invalidate the warranty.

No additional controls (relays, etc.) should be mounted in the control panel. Power and control wiring not connected to the York control panel should not be run through the control panel. If these precautions are not followed it could lead to a risk of electric shock. In addition, electrical noise could cause malfunctions or damage the unit and its controls.

Since some internal components are live when main power is switched on, the unit should not be switched on to the main power until it has been commissioned by York authorized personnel after connection.

All customer wiring at the jobsite must be routed to avoid high temperature areas (compressor shells, discharge piping, ambient coils and other hot surfaces) and sharp edges on the unit, to prevent damage to the wiring and possible short circuits. If these precautions are not followed it could lead to a risk of electrocution or damage to

Cooling tower

Pump

Bypass of condenser

Tee valve

Bypass

Cooling tower or other cooling source

Cycling loop

Tee valve

Condenser

Pump

Direct Pressure Control

With YEWS-E units it is possible, if desired, to control the condenser cooling liquid inlet temperature/flow directly from the unit refrigerant pressure. The refrigerant pressure can either be used to control cooling tower effectiveness by controlling fans or dampers on the tower, or to control condenser water flow using a three way bypass valve.The purpose of this method is to keep a low and steady discharge pressure .But with the units using R134

YEWS-E Water Cooling Screw Chiller/Heat Pump

the unit and its controls.

4.10 Condenser Cooling Water System For YEWS-E units, condensers are usually piped in conjunction with a cooling tower.

With water cooled units it is necessary to control the condenser water flow and/or temperature into the condenser to maintain refrigerant pressure as constant as possible to ensure satisfactory operation of the unit.

WARNING

Page 22

refrigerant, it is essential that the discharge pressure should be higher than suction pressure for more than 3Bar.In that case, units should be controlled by a certain setpoint higher than suction pressure or be controlled by the suction pressure and a pressure difference.However, the temperature and flow rate of cooling water should not exceeds the allowable range.

Inlet Temperature Control For a cooling tower system the simplest forms of control is to use fan cycling, fan speed control, or air damper control, with the tower having a thermostat in its sump. This will ensure stable condenser cooling liquid temperature and should be adjusted to ensure a condenser cooling liquid entering temperature of not lower than 21℃to 24℃ at lower ambient conditions.

If these methods are not available, or a cooling tower is not the source of cooling water, then a three way valve recirculation system can be used with control based on condenser inlet liquid temperature as shown in the upward diagram. In this case the objective is to maintain the inlet cooling liquid temperature as low as possible, although still observing the minimum limit of 21℃to 24℃.

4.11 Variable Primary Flow

Johnson Controls recommends a maximum 10% per minute flow rate change, based on design flow, for variable primary applications. Provide 8-10 gallons per chiller ton (8.6-10.8 liter per cooling KW) system water volume. Insufficient system volume and rapid flow changes can cause control problems or chiller shutdowns. There are many other design issues to evaluate with variable primary flow systems. Consult the Johnson Controls Sales Office for more information about successfully applying YEWS chillers.

4.12 Power Wiring

The allowable variation range of power supply voltage equal to the rated voltage value ±10％.

All electrical wiring should be carried out in accordance with local regulations.

In accordance with China National Standard it is the responsibility of the user to install current overload protection for input power supplies of York units.

All sources of supply to the unit must be taken via a common point of isolation (not supplied by York).

Single Point Power Supply Wiring

Models require field provided 380V(400V/415V)/3P / 50Hz power supply to the unit with circuit protection. Connecting power supply to the terminal block located in the power panel on site.

4.13 Control panel Wiring

The power connect to the I/O switch input terminal is 12VDC while the power connect to the I/O switch output terminal is 220VAC.

The wiring with 220VAC power must use the dry-contact (It is suggested to use the golden contact).If the dry-contact is part of a relay or a contactor, a capacitance-resistance suppresser wind ing must be used to restrain the Electromagnetic Interference.Make sure that the above precautions are followed to avoid the Electromagnetic Interference, which may result in the fault or damages on the unit or the controller.

The length of cable connected to these terminals should not exceed 7.5 meters.

4.14 220VAC Output Water pump starter

When the terminal 21 send out a 220VAC power, the water pump should be started.So the opening and stopping control of pump can be achieved by contactor and start/stop program.

Note: Power load should not exeed 5w.

Alarming contract

When the terminal 26 send out a 220VAC signal, the unit should be in the alarming status.

Note: Power load should not exeed 5w.

4.15 System input Flow switch

A suitable water flow switch must be connected to terminals 1 and 13 to provide adequate protection against loss of liquid flow.

Note: Contact Resistance <5Ω.

Remote Run/Stop

Connect a remote switch between 8 and 13 to provide remote start/stop if required.

Note: Contact Resistance <5w.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 23

5 CONTROL CENTER

5.1 Safety notice for the operation of the controller (1) “ Safety Notice” contains all important matters

related with safety. Please strictly follow. Signals used in this manual:

A WARNING is given in this document to identify a hazard, which could lead to personal injury.

A CAUTION identifies a hazard which could lead to damage to the machine, damage to other equipment and/or environmental pollution.

A NOTE i s u sed to highlight additional information, which may be helpful to you but where there are no special safety implications.

(2) Installation

Please keep this technical manual well for reference at any time. Please also give this to other people operating this machine for reference.

Only the appointed accessory by YORK can be used, and please ask manufacturer or authorized dealer to provide the corresponding technical installation and technical service. Malfunction of controller or electric shock may be caused from improper installation of the controlling accessory. The user is prohibited to maintain the machine by itself, because electric shock or controller damage may be caused due to improper repair of the controller. Please consult the manufacturer for any repair demand.

(3) YORK-003 Control Board

YORK-003 control board must be installed on one stable panel without the accumulative rain or snow, leaf or other wastes in the host. The intensive circuit generally passes through the installation center; also AC220V passes the control panel. As for the installation location of outdoor control panel, the principle of power and signal wires connected separately should be followed to keep the distance between the control panel and contactor is above 100mm.

(4) XS08 HMI

XS08 HMI should be installed stably, otherwise, it may fall down to cause body injury or damage on controller.

It is required to adopt the specified cable for power supply. Please do not share the power with other electric appliance to avoid the danger due to overloading. It is required to use the fuse or breaker suited with the working pressure of controller. Please do not use the wire or fuse beyond the specified grade.

(5) Earthing

YOR K-0 03 co ntr ol boa rd and she ll of transformer must be connected with the ground wire. Please do not connect the ground wire with the fuel gas pipe, water pipe, or lightning protection conductor. Electric shock may be caused if it is improperly earthed. Please inspect regularly whether the connection between the earthing wire of controller and earth terminal and earthing electrode of unit is firm or not.

(6) Operation

Do not press the keypad with the sharper to avoid damaging the controller. Do not twist or drag the wire of the controller to avoid damaging the controller to further malfunction. Do not wipe the controller with the benzene, thinner or chemical cloth, otherwise, the component should be in malfunction. Do not use much strength on the screen or connection part to avoid the color variation.

5.2 Initialization Operations

After completing the installation and connection

of YEWS-E HMI, it is required to perform the initialization operation before putting into running.

(1) Situations for Initialization

When the HMI and the control board are interconnected to form the control system for the first time, it is required to be initialized.

If the HMI in the interconnected running control system is damaged, it must be replaced with the new centralized controller, it is required to be initialized, and it is the same case for control main board.

If the controller or main board in one control system

WARNING

NOTE

CAUTION

WARNING

CAUTION

WARNING

CAUTION

WARNING

NOTE

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 24

1 2 3 4

AC Units

network needs to run upon exchanging with another control system network, it is required to be initialized.

(2) Process for Initialization Operation

Power off the control system.

If firmware of YORK-003 is 1.06 and previous versions(Suitable for YEWS100/130/170/200/210), detailed setting methods are shown in following figure:

1 2 3 4

ITS Units

1 2 3 4

HP Units

DIP switch can not be set by anyone except manufacture.

The measuring range of pressure sensor used in AC/ITS units: 0.41~5.1 Kg/cm2

The measuring range of pressure sensor used in HP units: 0~20.69 Kg/cm2.

If firmware of YORK-003 is 1.07 and last versions,DIP does not need to set in single system unit(Suitable for YEWS/100/130/170/200/210/215).

Control system power on.

Press F2 in the main interface of centralized controller to enter into the parameter setting interface-1, turn to the

next upon inputting the password.

Turn to the parameter setting interface-16. Please select the correct Model before doing the next operation.

Turn to the parameter setting interface-17, and move the cursor on the line of CLEAR RECORD to set all parameters as SYS1 or SYS2 by pressing 8, and press √ to confirm. Move the cursor on the line CLEAR FAULT RECORD to set all parameters as YES by pressing 8, and press √ to confirm. Move the cursor on the line of DEFAULT DATA to set the parameters as YES, press confirmation key to confirm.

Turn to the parameter setting interface-16, and move the cursor to the line of SYS1 FLA and SYS2 FLA (only set SYS1 on the single system) to select the correct FLA value via number “0” to “9”. After correct setting, move the cursor on the line SYS1 CUR.OFFSET and SYS2 CUR.

OFFSET (only set SYS1 on the single system) of parameter setting interface-3 to set the correct value. The

default is 100, which can be set before the unit leaves the factory. The user and service personnel shall not attempt to modify the parameter; otherwise the unit may fail to be run properly.

Control system power off.

Power on again after powering off HMI and control board.

Return to the main interface by pressing F1, then press F1 to enter into Status display interface to view the co mm un ic at io n of HMI an d co nt ro l boar d. The communication status of centralized controller and control board will be displayed in Status display interface. If it is displayed in normal, please check the input status of AI and DI for each module via the display interface, then the startup can be done after confirmation.

Note: Only select the unit style “ E” on unit

Model setting, example YEWS100HA50E or YEWS100HA50E-HP.

YEWS-E Water Cooling Screw Chiller/Heat Pump

NOTE

Page 25

5.3 Instructions on the operation (1) Instruction of HMI Keypad

The unit will shut down when pressing this key. It will return to the main interface upon pressing this key in any interface. Function 1: Confirm the modified parameter. Function 2: Select the next modifying parameter in the parameter set interface.

Function 1: Press this key in the main interface to check the unit status, AI, DI and DO status. Function 2: Return to the main interface.

Function 1: Enter into the clock set interface by pressing this key in the main interface. Function 2: Turn to the previous page by pressing this key in the information inquiry, parameter set and fault inquiry interfaces.

The unit will start up when pressing this key. The fault happened can be inquired upon pressing this key. Function 1: Press this key to cancel the input value for the parameter modified before pressing the confirmation key. Function 2: Select the last modified parameter in the parameter set interface. Enter into the system set interface upon pressing this key in the main interface; modify the corresponding parameters according to the different password access.

Function 1: Enter into the fault inquiry interface upon pressing this key in the main interface. Function 2: Turn to next page by pressing this key in the information inquiry, parameter set and fault inquiry interfaces.

Function 1: Modifying the setting parameter. Function 2: “ 0” and “8” have the direction function when setting parameters, just as “△” and “▽”.

F3 F4

目

0 9

～

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 26

(2) Instruction of HMI Interface

A0 B0 : Communication interface with control board. A1 B1 : Communication interface with upper computer V0 : Common ground end

Input the DC power of 10-24V, the end marked with 0V is low, while the other end is positive

Press for 1 minute, then loosen, the centralized controller will be reset.

Note

ISP

10-24V

A0 B0 A1 B1 0V

Wiring diagram of HMI

Instruction:

A0, B0: Communication interface of HMI and mainbord

A1, B1: Communication interface of HMI and upward computer

0-24V: Pwer connction of HMI, among which 0V means the ground.

ISP: Interface for downloading mainbord programs

Symbol

CN5(KEY BUS)

CN6(ISP)

CN2

CN3

RST_SW

Description

Keyboard interface

Download interface of ISP program

485 communication port

Input power

Reset key

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 27

(3) Instruction of Control board Interface

(4)Wiring diagram of control board

(a) Power and DO output interface diagram

Instruction

DO1-DO10 : Relay output

DO11-DO14 : Relay output

DO15A,DO15B : Bi-directional Thyristor output

L : AC220V live wire

N : Zero line

Symbol

CON2(COMU)

COM DI1–DI12

CON3

VCC

0V AI13–AI16

+12V AI1–AI12 CN5，CN6

COM1

COM2

DO15A，DO15B DO16A，DO16B

L，N

JP1

AI13–AI16（Alignment needle）

TEST

SW1

POWER(LED)

COM(LED)

RUN(LED)

Description

485 communication port

Common port of DI switch input

DI switch input

Blower speed adjusting interface.

+5V power with analog quantity input Ground end of analog quantity input

Analog input

+12V power output

Analog input

Expansion output

Output common port of relay

Thyristor output

Note

Connect according to the marked A, B, positive and

negative terminal of power

The two COM ports are jointed together

12 DI switch inputs in all

PG motor speed adjustment

VCC of all 6 circuit is connected

Ground end of AI13 to AI16,All connected together

4-20ma 1-5V or NTC signal input

Ordinary NTC signal input

2*4 ways TTL level output

Common port of DO1 - DO10

Common port of DO11 -Do14

220VAC/50Hz

Connect or break the load resistance, operate according to the above diagram

Selection of AI13-AI16 analog quantity divided resistance,

the operating method refers to the panel

For downloading programs

Setting the main board address

Red, the light will be on if the power of main board is in normal situation

Green, communication success for one time, turning over

Yellow, flash in 0.5Hz frequency

AC power input

Safety ground end

485 resistance control of communication load

Selection of divided resistance

Test

Dial switch

Power indicating lamp

Communication indicating lamp

Running indicating lamp

COM1 : Common port of DO1-DO10 output

COM2 : Common port of DO11-DO14 output

DO16A,DO16B : Bi-directional Thyristor output

PE : Earthing

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 28

(b) Diagram of AI Analog signal input port

AI13

AI16 AI15 AI14

VCC AI12 AI11 AI10 AI9 AI8 AI7 AI6 AI5 AI4

AI3 AI2

+12V

VCC AI16 0V VCC AI15 0V VCC AI14 0V VCC AI13 0V

AI1

VCC

Instruction:

VCC : +5V power supply 0V : +5V power ground +12V : +12V power supply AI1-AI12 : Analog signal input, each port in grounded via 10K reisitance

Instruction:

COM：Common port of DI switch input DI1-DI12：DI switch input

- 12V + B A

COM DI1

DI2 DI3 DI4

DI5

DI6

DI7

DI8 DI9 DI10 DI11 DI12

COMU

COM

A,B：Communication interface 12V： Power supply interface from control panel to

outside power

AI13-AI16 : Analog signal input, reisitance of each port in grounded can be selected by jumper wire(maked on the control screen). AI13-AI16(PIN) : Selection of divider resistance of analog quantity, the detail operation methods related to the diagram on the board.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 29

NO.

AI1

AI2

AI3 AI4

AI5

AI13

AI14

AI15 AI16

Analog input

Measuring scope and status description

(5) Analog, digital, input/ouput definition

(a) Definition of analog input/ouput

Leaving condenser liquid Leaving heat liquid(heat pump)

Enter condenser liquid

Enter heat liquid(heat pump)

Leaving evaporator liquid

Enter evaporator liquid

Discharge temperature

Evaporat pressure

Discharge pressure

Oil pressure Compressor motor current

-19~99℃, fault once exceeding the scope

-29~149℃, fault once exceeding the scope

0.41~5.1 kg/cm2 Air conditioning/ice storage 0~20.69kg/cm2 water source heat pump

0~28kg/cm2, fault once exceeding the scope

Fault of rated currency, disconnecting or short circuit

Instructions: Pressure units relation ships: 1 Kg/cm =98.07Kpa; All the pressure in this file means gauge pressure except it is explained specially.

(b) Definition of digital input

Status description

Normal in close, disconnecting means fault

Open means air-conditioning/Close means ice storage

Open means air-conditioning /Close means heat pump

Normal in close, disconnecting means fault

Open means shutdown, close means startup

Switch input

Flow switch

AC/ITS switch

AC/HP switch

Discharge pressure switch

Oil level switch

Motor protection

Ext.interlock

Start fault

Remote

DI1

DI2

DI3

DI4

DI5

DI6

DI7

DI8

Remark: When the manual control passage is set as remote in the centralized controller, the unit will startup and stop according to the status of DI8 (remote switch), and DI8 open means shutdown, while startup in close.

YEWS-E Water Cooling Screw Chiller/Heat Pump

No. DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8 DO9 DO15 DO16

Output

Pump Motor Y contact Motor △ contact Oil heater Bypass valve1 Alarm Valve liquid injection Bypass vaive2 Run status Cr4 Cr3

Status description

Always opened, close in output Always opened, close in output Always opened, close in output Always opened, close in output Always closed, open in output Always opened, close in output Always closed, open in output Always closed, open in output Always closed, open in output Always closed, open in output Always in outputopened, close

Page 30

5.4.2 H ome Interf ace

On the home interface: Pressing the F1 to F4 key will enter into 4 sub-interfaces of “ INFO” “ SET” “ TIME” and “ FAIL”

separately.

The first line of the main interface will display the current date and time. LCL/LHL: In AC and ITS mode, it's the leaving condenser cooling liquid temperature. In heap-pump mode, it's the leaving condenser hot water temperature is displayed, which should be regarded as the control reference in HP mode..

ECL/EHL: In AC and ITS mode, it's the enter condenser cooling liquid temperature. In heap-pump mode, it's the enter condenser hot water temperature is displayed.

LEL: Leaving evaporator liquid temperature, which should be regarded as the control reference in AC&ITS mode.

WELCOME TO USE YORKCHILLER

YEWS Scr ew chille r

INFO

SET

TIME

FAIL

HEAT

2 006/ 00/ 00 0 0 :00 :00 S at

5.4 Instructions of Display Interface

5.4.1 Initialization Interface

A JOHNSON CONTROLS COMPANY

OFF MODE

OPH

LHL

ENL

LIMT

LEL

EEL

COMM. SYS1 ON SYS2 ON 01#

UNIT TYPE AC UNIT

COMP STA LOW DISH HOLD

SAT.EVAP.T

SAT.DIS.T

DIS.SUPERHEAT

UL.COEF,

ANTI-RECYC TIMELEFT 100S

25.0℃

100.0%

RETU

18.0＾C

EEL:Entering evaporator liquid temperature.

MODE: Current operation mode of the unit

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.

OPH&LIMT: Flash display the unit status, no display if there is no relevant operation status.

FAIL: Flash diaplay if there is fault, no display if without fault.

The start and stop operation can only be done on the home interface.

5.4.3 Status Display

In the home interface, enter into the display interface upon pressing F1 key, while in the display interface, the operation instructions for the keys are as follows:

(1) Status display interface-1

Press F1 to return to the main interface. Press F4 to enter into the next display interface.

COMM.STATUS: If the communication between the centralized controller and 1# main board is normal, SYS1 ON will be displayed, otherwise, SYS1 OFF will be displayed. If the communication between the centralized controller and 2# main board is normal, SYS2 ON will be displayed,otherwise, SYS2 OFF will be displayed.In single compressor unit,SYS2 OFF always be displayed.In single compressor unit,SYS1 ON only be used.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 31

UNIT TYPE: AC/ITS/HP

COMP STA: C om press or s tatus ,the displ ay ed

information is as follows: COMP OFF- The compressor is off.

STOPPING- The compressor is stopping

STARTING- The compressor is starting

HIGH DP UNLOAD- Discharge pressure is too high and the compressor executes to unload

LOW EVAP UNLOAD- Evaporating pressure is too low and the compressor executes to unload.

HIGH CUR UNLOAD- Current of compressor motor is too high and the compressor executes to unload.

LOW DISH UNLOAD- Discharge Superheat is too low and the compressor executes to unload

LOW DISH HOLD- Discharge Superheat is too low and the compressor executes to hold.

HIGH CUR HOLD - Current of compressor motor is too high and compressor executes to hold.

HIGH DP HOLD- Discharge pressure is too high and the compressor executes to hold.

HIGH DP UNLOAD- Discharge pressure is too high and the compressor executes to unload.

MANUAL LOAD- Make the compressor executes to load by manual control

MANUAL UNLOAD- Make the compressor executes to unload by manual control

CAP HOLD- The compressor is holding

CAP LOAD- The compressor is loading

CAP UNLOAD- The compressor is unloading

HIGH DIST LOAD- Discharge temperature is too high

and the compressor executes to load. MINIMUM LOAD- Current of compressor motor is below minimum load setting, compressor executes to load.

SAT.EVAP.T: Saturation temperature of the refrigerant in Evaporator.

SAT.DIS.T: Saturation temperature of the discharge refrigerant.

DIS,SUPERHEAT: Discharge superheat equals to the diacharge temperature minus the saturation temperature of the discharge refrigerant.

ULCOEF: The value of compressor running current to the unit FLA.

Note: In top right corner, the digital box can be entered with setting values. This setting is for switching display information of different system. Enter 01 for displaying information of system1 and 02 for displaying information of system2, and the same case for others. System 2 is only used in the system with dual compressor (YEWS250).

(2) Status display interface-2

Press F1 to return to the main interface. Press F3 to return to the previous display interface. Press F4 to enter into the next display interface.

AI1 LHL

AI2 EHL

AI3 LEL

AI4 EEL

AI5 DIS.T

AI13 EVAP.P

AI14 DIS.P

AI15 OIL P

18.0

180KPa

℃ ℃ ℃ ℃ ℃

RETU

BACK

01#

This interface displays the sampling value of AI analog channel of the main board.

(3)Status Display Interface-3

Press F1 to return to the main interface. Press F3 to return to the previous display interface. Press F4 to enter into the next display interface.

YEWS-E Water Cooling Screw Chiller/Heat Pump

NOTE

Page 32

AI16 CURRENT

DO1

DO2 MOTOR Y CONTACT

DO3 MOTOR △ CONTACT

DO4

DO5

DO6

PUMP

OIL HEATER

BYPASS VALVE1

ALARM

RETU

BACK

18.0Amp

01#

This interface displays the input status of DO relay of the main board.

ON indicate the digital output is closed.

(4)Status Display Interface-4

Press F1 to return to the main interface. Press F3 to return to the previous display interface. Press F4 to enter into the next display interface.

DO7 VALVE LIQ.INJ.D

DO8 BYPASS UAL UE2

DO9 RUN STATUS

DO15 CR4

DO16 CR3

RETU

BACK

01#

This interface displays the output status of DO relay of the main board.

ON indicate the digital output is closed.

(5)Status Display Interface-5

Press F1 to return to the main interface. Press F3 to return to the previous display interface. Press F4 to enter into the next display interface.

FLOW SW

DIS.P SW

OIL SW.

DI1

DI2 RUN MODE SW

DI3

DI4

DI5 MOTOR PROTECTION

DI6 EXT.INTERLOCK

DI7 START FAULT

DI8 REMOTE

OFF

RETU

BACK

01#

POWER SUPPLY 3P-415V-50Hz

COMP MODEL YFS205LBF

MAX. LOAD AMP 18.0 Amp

HMI VER. RMSYEWSD100/V1.01

RETU

BACK

RMSYEWSD100/V1.01

0HOUR

I/O VER.

RUN TIME

COMP ON-OFF CNT

COMP RUN TIME

01#

POWER SUPPLY：Power supply of unit.

COMP MODEL：Model of compressor in this unit.

MAX.LOAD AMP：Maximal load amp of motor.

HMI VER. ：Firmware version of XS08.

I/O VER. ：Firmware version of YORK003.

RUN TIME：Accumulated running time of the pump

COMP RUN TIME： Accumulated running time of the

compressor

COMP ON-OFF CNT： Startup times of the com- pressor

5.4.4 Parameter setting

In the main interface, press F2 to enter into the parameter setting interface, the operation instructions for the keys are as follows:

This interface displays the input status of DI switch of

the main board.

ON indicate the digital output is closed.

(6)Status Display Interface-6

Press F1 to return to the main interface. Press F3 to return to the previous display interface.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 33

ENG LI SH

ACCESS LEVEL VIEW

PASSWORD

LANGUAGE

RETU

CHG

SYSTEM SETTING

Press 0~ 9 to input the values for the digital type parameters.

For non-digital type parameters, press 0 or 8 to select (same as “ ▽ ” and“ △ ” ) Press √ to confirm, and press X to cancel.

Press √ to confirm the input parameter, or select the previous parameter input interface.

Press X to cancel the input parameters and input new parameters again, or select the previous parameter input interface.

Press F1 , different functions with the different interface

Press F2 , different functions with the different interface

Press F3 , different functions with the different interface

Press F4 , different functions with the different interface

The input parameters will be invalid if they are exceeds the setting ranges.

(1)Parameter Setting Interface-1-a

Press F2 in the main interface to enter into this interface

If the password is not input in this interface, press F2 to enter into the parameter setting interface, but it can be only viewed, not set.

Press F1 to enter into the main interface Press F4 to enter into the password modifying interface

Parameter Setting Interface-1-b Input the operator password 9675 in the parameter setting interface-1-a, and press the key to confirm.

The appeared interface is as the parameter setting interface-1-b, then press F2 to enter into the setting

interface. The parameter setting is limited to the operator access level.

Press F1 to return to the main interface. Press F4 to enter into the password modifying interface.

ENG LI SH

ACCESS LEVEL OPERATOR

PASSWORD

LANGUAGE

RETU

CHG

SYSTEM SETTING

Parameter Setting Interface-1-c Input the service password **** in the parameter setting interface-1-b, and then press the key to confirm.

The appeared interface is as the parameter setting interface-1-c, then press F1 to enter into the setting

interface. The parameter setting is limited to the maintenance people.

Press F1 to return to the main interface. Press F4 to enter into the password modifying interface

ENG LI SH

ACCESS LEVEL SERVICE

PASSWORD

LANGUAGE

RETU

CHG

SYSTEM SETTING

Parameter Setting Interface-1-d Input the factory password **** in the parameter setting interface-1-c, and then press √ key to confirm.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 34

The following interface is the parameter setting interface-1-d, press F1 to enter into the setting interface,

then the handlers will have the higher access level to set all the parameters.

Press F1 to return to the main interface. Press F4 to enter into the password changing interface

ENG LI SH

ACCESS LEVEL FACTORY

PASSWORD

LANGUAGE

RETU

CHG

SYSTEM SETTING

Parameter Setting Interface-1-e

The changing of each access level password can be done in the parameter setting interface-1-e.

The contrast of screen will become weak when pressing F3.

The contrast of screen will become dark when pressing F4.

The CPU running efficiency is also displayed in this interface, which will be used by the Designing And Deploitation person. Press F1 to return to the main

RETU

THIN

DRAK

PASSWORD SETTING

OPERATOR

SERVICE

FACTORY

CONTRAST

CPU USED

Password validation interface, there are two status display areas, ACCESS LEVEL and PASSWORD, ACCESS LEVEL displays the setting access level of the current parameter, the different parameters can be set by input the

corresponding access password. There is four access level: “ VIEW” “OPERATOR” “ SERVICE” and “ FACTORY” . Input the password in the PASSWORD area by pressing the via the figure key, however, all the password in the PASSWORD area is displayed as *. The numbers of Parameters which can be set is decided by the acess level of input password. The parameters setting interface can also be entered into by pressing F1 without inputting the password, then the default level is VIEW.

Press √ after inputting the password, the corresponding access level can be displayed, then the parameter set interface can be entered into upon pressing F2. If the password is inputting correctly, the parameters setting of the corresponding access level can be done, otherwise all the parameters can only be observed.

Move the cursor on the line of language set via pressing √and X, 中文or ENGLISH can be selected by pressing 0 or 8 keys,press√ to confirm, or press X to cancel. If 中文 is selected, all the language on the display interface will be Chinese, otherwise in English.

CONTRAST:This parameter is used to adjust the contrast of the LCD, the brightness of displayed information will change obviously after the CONTRAST adjusting. This parameter is set in factory before Shipment, the user and service person should not attempt to change this parameter in case damages the LCD.

CPU USED: Just a displayed value, none of business with user.

(2) Parameter Set Interface-2

Press F1 to return to the main interface Press F4 to enter into the next setting interface

RETU

RUN MODE HP

RESET FAIL ----

CONTR.CYCLE 10S

LOAD TIME 0.5S

UNLOAD TIME 3.0S

MIN.RUN TIME 300S

ANTI -RECYCLE 480S

ANTI FREEZE YES

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 35

Setting scope and default value of the parameters:

RUN MODE: AC/ITS/HP/REMOTE Default: AC RESET FAIL: ----/SYS1/SYS2 Default: ---CONTR.CYCLE: 5 ~ 60 s Default: 10s MIN.RUN TIME: 120 ~ 600s Default: 300s ANTI-RECYCLE: 120 ~ 600s Default: 480s LOAD TIME: 0.5 ~ 20.0s Default: 2.0s UNLOAD TIME: 0.5 ~ 20.0s Default: 4.5s ANTIFREEZE： YES/NO Default: YES

Parameters setting instructions:

RUN MODE：The working mode can be selected via 0 and 8 keys, press X to cancel and √to confirm.

RESET FAIL：Select via 0 and8, press X to cancel, and √ to confirm. If you choose SYS1 and confirmed, it will reset system1 failure. If you choose SYS2 and confirmed, it will reset system2 failure.

CONTR.CYCLE: The time period for unit capacity regulation, default is 10s

MIN.RUN TIME: The minimum operation time once the compressor is started, default is 300s.

ANTI-RECYCLE: The minimum stand-by time of the unit after the compressor is stopped. This function is provided to protect the compressor motor from burn out due to frequent starting, the default setting is 480s.

LOAD TIME: Time of CR4 solenoid of compressor is energized.

UNLOAD TIME: Time of CR3 solenoid of compressor is de-energized.

ANTIFREEZE: Select whether activate anti-freeze operation protection in standby state via this unit setting parameter. If YES, the unit has anti-freeze protection function in standby state, otherwise, no such function.

(3) Parameter Setting Interface-3

Press F1 to return to the parameter setting interface-1 Press F3 to return to the previous setting interface Press F4 to enter into the next parameter setting interface

SYS1 RUN CTRL. AUTO

SYS2 RUN CTRL. AUTO

SYS1 CUR.OFFSET 100%

SYS2 CUR.OFFSET 100%

SYS1 BYPASS CTRL. MANUAL

BYPASS1 ON BYPASS2 ON

SYS2 BYPASS CTRL. MANUAL

BYPASS1 ON BYPASS2 ON

RETU

BACK

Setting scope and default of the parameter:

SYS1 RUN CTRL. AUTO/LOAD/UNLOAD Default：AUTO SYS2 RUN CTRL. AUTO/LOAD/UNLOAD Default：AUTO SYS1 CUR.OFFSET 50~150% Default：100% SYS2 CUR.OFFSET 50~150% Default：100% SYS1 BYPASS CTRL. AUTO/MANUAL Default：AUTO SYS2 BYPASS CTRL. AUTO/MANUAL Default：AUTO

Parameter setting instruction: SYS1 RUN CTRL.： For system1,Select via 0 and8,

press Xto cancel, or √ to confirm. If select AUTO, the unit will automatically carry out load/unload control according to water temperature conditions; if select LOAD, the unit will carry out compulsive load (CR3 and CR4 solenoid of compressor is energized); if select UNLOAD (CR3 and CR4 solenoid of compressor is deenergized), the unit will carry out compulsive unload.

SYS2 RUN CTRL.：For system2,With the same SYS1 RUN CTRL..

SYS1 CUR.OFFSET： Minor error between current

value displayed on centralized controller and actual measured current value may be adjusted with this parameter, i.e. active displayed current value multiplies adjustment coefficient to make the final displayed cur-rent value be equal or close to actual measured current value. Setting method is as follows: if current of compressor displayed on centralized controller is 100A and actual measured current is 105A, SYS1 CUR.OFFSET may be set as 105, after that, current of compressor displayed on centralized controller will also be 105A which is equal to actual measured value.

SYS2 CUR.OFFSET：With the same SYS1 CUR.OFFSET.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 36

SYS1 BYPASS CTRL. ：If SYS1 BYPASS CTRL. is set as AUTO, which should be controlled according to the specific logic; while if SYS1 BYPASS CTRL. is set as

MANUAL, it should be operated in accordance with the BYPASS1 or BYPASS1.

(BYPASS just suit for the style before D1)

SYS2 BYPASS CTRL. ： For system2,With the same SYS1 BYPASS CTRL.

Single-system units, Settings of related to the system2 don’t use.

(4)Parameter Setting Interface-4

Press F1 to retur n t o th e paramete r settin g interface-1. Press F2 to enter into the parameter setting interface of AC mo de. Press F3 to enter into the parameter setting interface of ITS mode. Press F4 to enter into the parameter setting interface of HP mode.

LEL TEMP SET 7.0℃

LEL TEMP CR 1.0℃

CR BUFFER 2.5℃

LOW LELT 2.0℃

HIGH LCLT 43.0℃

L E.P UNLOAD 175KPa

L E.P SHUTDOWN 165KPa

COOL SETTING

RETU

MODE SET TIN G

COOL SETTING

ITS SETT ING

HEAT(D 1-H P/E-HP2 ) SET TING

RETU

(5)Parameter Setting Interface-5

Press F1 to return to the parameter setting interface-3. Press F4 to enter into the next parameter setting interface.

Setting scope and default value of the parameter LEL TEMP SET: 4.0℃~15.0℃ Default: 7.0℃ LEL TEMP CR: 0.5℃~2.0℃ Default: 1.0℃ HIGH LCLT : 30.0℃~60.0℃ Default: 43.0℃ L E.P UNLOAD: 150~300kPa Default: 175kPa L E.P SHUTDOWN: 150~300kPa Default: 165kPa CR BUFFER： 1.0 – 2.5℃ Default: 2.5℃ LOW LELT： 1.0 – 7.0℃ Default: 2.0℃

Parameter setting instructions:

LEL TEMP SET: Set the desired leaving evaporator fluid temperature, the default is 7.0℃

LEL TEMP CR: Used to decide the desired fluid temperature control range, the default is 1.0℃

LOW LELT: If the leaving evaporator liquid temperature≤ LOW LELT setpoint, fault alarm will be displayed and the compressor will be shut off, but the water pump is still on runing. The Cycling Startup Logic will be actived when the leaving chilled liquid temperature≥ (LOW LCLT setpoint +10.0℃ ).

HIGH LCLT ：If the leaving condenser liquid temperature ≥ HIGH LCLT setpoint, fault alarm will be displayed and the compressor will be shut off, but the water pump is still on runing. The Cycling Startup Logic will be actived when the leaving cooling liquid temperature≤ (HIGH LCLT temperature setpoint -

10.0℃ ).

L E.P UNLOAD: If the evaporator pressure≤ L E.P UNLOAD setpoint, the compressor will unload compulsively,the unit will come back to normal capacity control when the evaporator pressure≥(L E.P UNLOAD setpoint+25Kpa ). Default L E.P UNLOAD setpoint is 175kPa.

L E.P SHUTDOWN: If the evaporator pressure≤ L E.P SHUTDOWN setpoint, the unit will stop immediately. Default L E.P SHUTDOWN setponit is 165 kPa.

The control method of units in ITS/HP mode is the same as those in AC mode, but the setpoints are different with different working mode.

YEWS-E Water Cooling Screw Chiller/Heat Pump

HEAT(E -HP ) SETTING

Page 37

Instructions for capacity control (AC mode for example)

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. when leaving chilled water

temperature ≥(Ts - D) and≤(Ts + D) , the comrepssor will operate fuzzy control logic. when leaving chilled

water temperature ≥(Ts – D- Db) and≤(Ts - D) , the comrepssor will unload. When leaving chilled water

temperature ≤(Ts – D- Db) , the compressor will be cycling shut down.

By setting the value of Ts, D and Db, the temperature range of different running

mode(Hold/Unload/Load/Stop) of compressor can be adjusted.

Holding

Unloading

Emergency Stop

Low temperature

High temperature

Ts+D

Ts-D

Ts-D-Db

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 38

(6) Parameter Setting Interface-6

Press F1 to return to the parameter setting interface-3

Press F3 to return to the previous setting interface

Press F4 to enter into the next parameter setting interface

COOL SETTING

RETU

HOLD LOAD D.P. 1030KPa

UNLOAD D.P. 1060KPa

HIGH D.P.SHUTDOWN 1090KPa

UNLOAD CURR. 95 % DELTA T 3.5℃ LISU TEMP 70.0℃

MINIMUM LOAD 15 %

BACK

Setting scope and default value of the parameter:

HOLD LOAD D.P: 100～1300KPa Defoult:1030KPa UNLOAD D.P: 100～1300KPa Defoult:1060KPa HIGH D.P.SHUTDOWN: 100～1350KPa Defoult:1090KPa UNLOAD CURR: 10～98 % Defoult:95% DELTA T: 2.0～6.0℃ Defoult:3.5℃ LISV TEMP: 50.0～80.0℃ Default: 70.0 ℃ MINIMUM LOAD: 15~75% Default: 15%

If you select the different MODE,the setting of D.P is different. If you want to know the exact parametere,please see 5.5

Parameter setting instructions:

HOLD LOAD D.P: If the discharge pressure ≥ HOLD LOAD D.P setpoint, the compressor will stop loading . (Default value is 1030 kPa under AC/ITS mode, and 1581kPa under HP mode); If the discharge pressure ≤ (HOLD LOAD D.P-50 kPa), the unit will turn back to normal capacity control logic.

UNLOAD D.P.: If the discharge pressure ≥ UNLOAD D.P setpont (Default value is 1060 kPa under AC/ITS mode, and 1700kPa under HP mode), the compressor will unload rapidly.If the discharge pressure ≤ (UNLOAD D.P.-100 kPa) , the unit will turn back to normal capacity control logic.

HIGH D.P.SHUTDOWN: If the discharge pressure ≥ HIGH D.P.SHUTDOWN setpont (Default value is 1090 kPa under AC/ITS mode, and 1790kPa under HP mode), the compressor will stop running .

UNLOAD CURR: OCC- Percentage of the compressor running amps to MLA(maximum load amps)

MLA-Maximum Load Amps, corresponding with the maximum compressor input power.

DELTA T: The difference between leaving evaporator fluid temperature and evaporator refrigerant temperature. Relate to liquid line bypass valve controlling; refer to the instructions of control system.

The control method of units in ITS/HP mode is the same as those in AC mode, but the setpoints are different with different working mode.

(7) Parameter Setting Interface-7

Press F1 to return to the parameter setting interface-3 Press F2 to modify the signs of parameter set Press F4 to enter into the next parameter set interface

Hold

Medium speed

Compulsory

Unload

Compressor current （OCC-5%）*MLA

Compressor current ≥（OCC-4%）*MLA

Compressor current ≥（OCC-3%）*MLA

Compressor current ≥MLA，delay 5s

≥

shut down

ITS SETTING

LEL TEMP SET -5.6℃ LEL TEMP CR 1.0℃ CR BUFFER 2.5℃ LOW LELT -10.0℃ HIGH LCLT 43.0℃

L E.P UNLOAD 175KPa

L E.P SHUTDOWN 165KPa

RETU

+/-

LEL TEMP SET: -8.0℃～+5.0℃ Default: -5.6℃ LEL TEMP CR: 0.5℃～2.0℃ Default: 1.0℃ CR BUFFER: 1.0 – 2.5℃ Default: 2.5℃ LOW LELT: -15.0℃～+5.0℃ Default: -10.0℃ HIGH LCLT: 30.0℃～60.0℃ Default: 43.0℃ L E.P UNLOAD: 80～300kPa Default: 175kPa . L E.P SHUTDOWN: 80～300kPa Default: 165kPa

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 39

(8) Parameter Setting Interface-8

Press F1 to return to the parameter setting interface-3

Press F3 to return to the previous setting interface

Press F4 to enter into the next parameter setting interface

ITS SETTING

HOLD LOAD D.P. 1030KPa

UNLOAD D.P. 1060KPa

HIGH D.P.SHUTDOWN 1090KPa

UNLOAD CURR. 95%

DELTA T 4.5℃

LISV TEMP 70.0℃

MINIMUM LOAD 15%

BACK

RETU

Setting scope and default value of the parameter:

HOLD LOAD D.P: 100 ～ 1300kPa Default: 1030kPa UNLOAD D.P: 100 ～1300kPa Default: 1060kPa HIGH D.P.SHUTDOWN : 100～ 1350kPa Default: 1090kPa UNLOAD CURR: 10 ～98 % Default: 95 % DELTA T: 2.0 ～6.0℃ Default: 4.5 ℃ LISV TEMP: 50.0 ～80.0℃ Default: 70.0 ℃

MINIMUM LOAD: 15~75% Default: 35%

(9) Parameter Setting Interface-9

Press F1 to return to the parameter setting interface-3

Press F4 to enter into the next parameter set interface

LHL TEMP SET 55.0

℃

LHL TEMP CR 1.0

℃

CR BUFFER

2.5

℃

LOW LELT 2.0

℃

HIGH LHLT 62.0

℃

L E.P UNLOAD 175KPa

L E.P SHUTDOWN 165KPa

RETU

Setting scope and default value of the parameter:

LHL TEMP SET: 30.0～60.0℃ Default: 55.0℃ LHL TEMP CR: 0.5～2.0℃ Default: 1.0 ℃ LOW LELT: 1.0～7.0℃ Default: 2.0℃ HIGH LCLT: 30.0～62.0℃ Default: 62.0℃ L E.P UNLOAD: 150～300kPa Default: 175kPa L E.P SHUTDOWN: 150～300kPa Default: 165kPa CR BUFFER: 1.0 – 2.5℃ Default: 2.5℃

(10) Parameter Setting Interface-10

Press F1 to return to the parameter setting interface-3

Press F3 to return to the previous setting interface

Press F4 to enter into the next parameter setting interface

HEAT(D1-HP/E-HP2) SETTING

RETU

HOLD LOAD D.P 1660KPa

UNLOAD D.P 1685KPa

HICH D. P. SHUTDOWN 1745KPa

UNLOAD CURR. 95%

DELTA T 4.5℃

LISU TEMP 80.0℃

MINIMUM LOAD 35%

BACK

Setting scope and default value of the parameter:

HOLD LOAD D.P. : 1000～1600kPa Default: 1581kPa UNLOAD D.P.: 1000～1700kPa Default: 1700kPa HIGH D.P.SHUTDOWN: 1000～1800kPa Default: 1790kPa UNLOAD CURR. : 10～98 % Default: 95% DELTA T: 2.0～ 6.0℃ Default: 4.5℃ LISV TEMP: 50.0～80.0℃ Default: 80.0 ℃

MINIMUM LOAD: 15~75% Default: 35%

YEWS-E Water Cooling Screw Chiller/Heat Pump

(11) Parameter Setting Interface-11

Press F1 to return to the parameter setting interface-3

Press F4 to enter into the next parameter set interface

HEAT(E-HP) SETTING

LHL TEMP SET 45.0

LHL TEMP CR 1.0

CR BUFFER 2.5

LOW LELT 2.0

HIGH LHLT 52.0

L E.P UNLOAD 175KPa

L E.P SHUTDOWN 165KPa

℃

RETU

Setting scope and default value of the parameter:

LHL TEMP SET: 30.0～50.0℃ Default: 45.0℃ LHL TEMP CR: 0.5～2.0℃ Default: 1.0 ℃ LOW LELT: 1.0～7.0℃ Default: 2.0℃ HIGH LCLT: 30.0～52.0℃ Default: 52.0℃ L E.P UNLOAD: 150～300kPa Default: 175kPa L E.P SHUTDOWN: 150～300kPa Default: 165kPa CR BUFFER: 1.0 – 2.5℃ Default: 2.5℃

HEAT(D1-HP/E-HP2) SETTING

Page 40

YEWS-E Water Cooling Screw Chiller/Heat Pump

(12)Parameter Setting Interface-12

Press F1 to return to the parameter setting interface-3

Press F3 to return to the previous setting interface

Press F4 to enter into the next parameter setting interface

HEAT SETTING

RETU

HOLD LOAD D.P 1286KPa

UNLOAD D.P 1303KPa

HICH D. P. SHUTDOWN 1356KPa

UNLOAD CURR. 95%

DELTA T 4.5℃

LISU TEMP 80.0℃

MINIMUM LOAD 35%

BACK

Setting scope and default value of the parameter:

HOLD LOAD D.P. : 1000～1400kPa Default: 1286kPa UNLOAD D.P.: 1000～1400kPa Default: 1303kPa HIGH D.P.SHUTDOWN: 1000～1400kPa Default: 1356kPa UNLOAD CURR. : 10～98 % Default: 95% DELTA T: 2.0～ 6.0℃ Default: 4.5℃ LISV TEMP: 50.0～80.0℃ Default: 80.0 ℃

MINIMUM LOAD: 15~75% Default: 35%

(14) Parameter Setting Interface-14

Press F1 to return to the parameter setting interface-3

Press F3 to return to the previous setting interface

Press F4 to enter into the next parameter setting interface

DAILY START:

DAILY STOP:

WEEK START1:

WEEK STO P1:

WEEK START2:

WEEK STO P2:

HOL START 1:

HOL STOP1:

RETU

00:00

00:00 SAT

00/00 00 :00

(13) Parameter Setting Interface-13

Press F1 to return to the parameter setting interface-3

Press F3 to return to the previous setting interface

Press F4 to enter into the next parameter setting interface

HOL START2:

HOL STOP2:

HOL START3:

HOL STOP3:

START PRIOITY: AUTO

USE ONE SYSTEM: DUAL

OIL PREHEAT: NO

BACK

RETU

00/00

00:00

The starting and stoping time on daily, weekends and holidays can be set on this interface.

At most 3 holidays can be set;

The incorrect input of date is not effective, for example, 00 means that the holiday is invalid.

If the START/STOP MODE is set as AUTO, the unit can automatically perform the startup and stop actions according to the set DAILY START/DAILY STOP, HOL START/HOL STOP/START or WEEK START/WEEK STOP.

If the START/STOP MODE is set as MANUAL, the automatic switch is invalid; it is required to perform the startup and stop action by the operations on HMI (Humanmachine Interface) manually.

The Priority level of the automatic start/stop action is: holidays >weekend >ordinary days. The startup and stop time at ordinary days, weekends and holidays can be set in the setting interface.

Setting scope and default of the parameter

OIL PREHEAT YES/NO Default: YES

The following words are used for YEWS250 only.

START PRIORITY AUTO/SYS1/SYS2 Default: AUTO USE ONE SYSTEM DUAL/SYS1/SYS2 Default: DUAL

Parameter setting instruction START PRIORITY： Dual-system units, you can

manual setting the priority to start the system, the case of default in accordance with the automatic selection of the

Page 41

Setting scope and default of the parameter

START CONDITION 100~300% Default：120% STOP CONDITION 100~300% Default：150%

Parameter setting instruction:

START CONDITION： When a system is running, the conditions to start another system.

STOP CONDITION：When the two systems running at the same time, the conditions for the turn off a system.

(16) Parameter Setting Interface-16

Press F1 to return to the parameter setting interface-3 Press F2 to modify the signs of parameter setting Press F3 to return to the previous setting interface Press F4 to enter into the next parameter setting interface

START/STO P MODE AU TO

CONTRO L MODE M ODBUS ECL OFFSET 0. 0℃ LCL OFFSET 0. 0℃

SYS1 FLA 111.0 A

SYS2 FLA 111.0 A

MODEL YEWS200DA5 3D

BYPASS VALVE DLY 15S

RETU

+/-

BACK

Setting scope and default of the parameter

START/STOP MODE MANUAL/AUTO Default:MANUAL CONTROL MODE LOCAL/REMOTE/MODBUS Default: LOCAL ECL OFFSET -5.0 ~ +5.0℃ Default: 0.0℃ LCL OFFSET -5.0 ~ +5.0℃ Default: 0.0℃ SYS1 FLA 60.0 ~ 400.0 A Default: 111.0 A SYS2 FLA 60.0 ~ 400.0 A Default: 111.0 A BYPASS VALVE DLY: 5~60 sec Default: 15sec

Parameter setting instruction: START/STOP MODE： When set as MANUAL, the

unit will operate according to the keys on the control panel or remote switch, or perform the switch control in Modbus protocol. If set as AUTO switch, the set time for startup and stop of the unit will control the startup and stop operations.

CONTROL MODE： If set as LOCAL, the startup and stop will be completed by the operation panel, if set as REMOTE, the startup and stop will be realized by DI

YEWS-E Water Cooling Screw Chiller/Heat Pump

priority system to start, if the start priority is set to System1, the system1 is always a priority in the system2 to start . Only in the USE ONE SYSTEM set up for

DUAL, this setting be useful.

USE ONE SYSTEM： Dual-system units, in some

cases wish to start a system, another system is not running. The default case, the two systems can be running. If the USE ONE SYSTEM is set to SYS1, then only system 1 is running, the system2 does not run; if the USE ONE SYSTEM is set to SYS2, then only the System2 is running, the system1 does not run; if the

USE ONE SYSTEM is set to DUAL, the system1 and system2 can be running. Only by

USE ONE SYSTEM set up for DUAL, START PRIORITY is used, otherwise non-functional.

OIL PREHEAT： In some cases the need for debug-

ging start unit, if the use of oil pre-heating will affect the debugging process. Therefore, through the OIL PREHEAT will be set to NO, temporarily masked the oil preheating function.When the debugger has finished,the

OIL PREHEAT must be set to YES.

START PRIORITY and USE ONE SYSTEM， Only

in the use of dual-system units, units in a single system does not use. These parameters should be setting in the two systems are in the case of stop.

(15) Parameter Setting Interface-15

START CONDITION: 150%

STOP CONDITION: 150%

BACK

RETU

Page 42

counters resetting is achived, for example, unit’s accumulated operation hours and compressor’s accumulated operation hours.

CLEAR FAULT RECORD.：Select whether carrying out YES operation or not by pressing 0 or 8, press √ key to confirm after selecting YES, then all historical fault information will be deleted.

DEFAULT DATA: Select whether carrying out reset operation or not by pressing 0 or 8, press √ key to confirm after selecting YES. By these operations, all setting parameters will be reset as default value.

BATTERY BACKUP: Select whether carrying out this operation or not by pressing 0 or 8, press √ key to confirm after selecting YES. From this, the chiller will have a backup function when power off suddently. When no person is on duty of monitoring the chiller, the controller will automaticly manage the running status. If BATTERY BACKUP is selected as YES, the controller will back up all the running status datas when the unit is power off, with which the unit can automaticly following this running status once it is repowered on .If the BATTERY BACKUP is selected as NO, this function is invalidation.

PASSWORD: Select whether carrying out this operation or not by pressing 0 or 8, press √ key to confirm after selecting YES. From this, the chiller will have a PASSWORD protection, with which no one is allowed to set the parameters except having the PASSWORD. Those who do not know the PASSWORD only have the observing permission.

RUN TIME LIMIT： If RUN TIME LIMIT is set as YES by pressing 0 or 8, the control panel will limit operation time of unit according to the setpoint of run time limit protection. Once accumulating time reaching or exceeding to run time limit, the unit will be automatically shut down, then the RUN TIME LIMIT will be flash displayed in display screen and the unit can only be unlocked by personnel with relative authority. If RUN TIME LIMIT is set asNO, the unit has no run time limit protection function.

YEWS-E Water Cooling Screw Chiller/Heat Pump

switch on the control panel, while if set MODBUS, its startup and stop will be finished by the upper computer.

ECL OFFSET，LCL OFFSET：For compensating the loss of signal in the transportation wire to ensure that the unit can run normally.

SYS1 FLA,SYS2 FLA： FLA of System1 and System2 FLA,Factory settings.

BYPASS VALVE DLY： Bypass valve action interval. That is time period from open to close or from close to open.

MODEL:Set the real mode.

(17) Parameter Setting Interface-17

Press F1 to return to the parameter setting interface-3 Press F3 to return to the previous setting interface

MODBUS ADDRESS

CLEAR RECORD

CLEAR FAULT RECORD

DEFAULT DATA

BATTERY BACKUP

PASSWORD

TIME LIMIT

LIMITED HOURS

RETU

BACK

001

YES

2100H

Setting scope and default value of the parameter:

MODBUS ADDRESS: 001 ~ 255 Default: 001 CLEAR RECORD ----/ SYS1/SYS2 Default: ---CLEAR FAULT RECORD: ----/ Yes Default: --DEFAULT DATA: ----/ Yes Default: --BATTERY BACKUP: No/Yes Default: NO PASSWORD: No/Yes Default: NO TIME LIMIT: No/Yes Default: NO LIMITED HOURS: 0 ~ 9998 H Default: 2100 H

Parameter settinig instruction: MODBUS ADDRESS： Setting the parameter to connect with the upper computer so as to realize the remote control of multiple units.

CLEAR RECORD： Select whether carrying out YES operation or not by pressing 0 or 8, press√ key to confirm after selecting YES. By doning this, all adjustable

Page 43

2006 - 00 - 00

00:00 :00 SAT

RETU

Input the parameter via pressing 0-9 according to the figure type;

Adding the address number one per time pressing 8 while minusing it one per time pressing 0.

Press√ to confirm the input parameter or select the next parameter input area.

Press X to input the parameter again or select the last parameter input area;

Days of the week can be adjusted by pressing 8 or 0 and press√ t to confirm.

Year, Month and Day can be input via the figure keys 0-9, and then press √ to confirm. If X is pressed before confirmation, the current input operation will be cancelled, and can return to the previous setting interface. If the input parameter exceeds the scope, the setting will be invalid.

5.4.6 Fault Inquiry

(1) Fault inquiry 1

Press F1 to return to the main interface Press F4 to enter into the next parameter setting interface

FAULT RE CORD NO. 01

AI1 LHL TEMP 25.0℃ AI2 EHL TEMP 18.0℃ AI3 LEL TEMP 5.0℃ AI4 EEL TEMP 5.0℃

RETU

SYS1 AI13 SENSOR FAULT

BEGIN 0000/00/00 00:00

END 0000/00/00 00:00

YEWS-E Water Cooling Screw Chiller/Heat Pump

(18) Parameter Setting Interface-18

Press F1 to return to the parameter setting interface-3 Press F2 to select whether it is allowed to be test or not. Press F3 to return to the previous setting interface

DIGITAL OU TPUT TEST

(Only in f act ory)

DO1 DO2 DO3 DO4

ON ON OFF

DO5 DO6 DO7 DO8

DO9 DO10 DO15 DO16

ON ON ON

RETU

YES

BACK

ON ON ON

01#

On the cursor location, select ON/OFF by pressing 0 and 8, if the output operation for DO test has been set as YES, the DO1 on YORK003 panel should be changed simultaneously with the status of DO1 on this page. It means that the DO1 in mainboard will open once it is set as ON in this interface. Setting of the other DO outputs is the same as DO1.

Since it is not facility for the electrical testing for control panel when the unit is on running, The operation of DO output testing should be done after the unit stops. Output function of DO test is just valid in this interface and it will automatically be invalid once turn into other interface. Disconnect the main circuit power of compressor before performing DO test output.

After the DO output test, the HMI and YORK0003 mainbord should be power off and reset so as to turn the unit into normal mode running mode.

Note:Testing operation is only used for cortrol panel

testing, so main power supply should be power off in

the testing period. Such function is not prohibited to

use on other occasions. Otherwise it will result in

damages to unit and YORK will not be responsible

for such damages.

5.4.5 Clock Setting

Press F1 to return to the main interface

Clock setting interface-1

Page 44

(4) Fault Inquiry 4

Press F1 to return to the main interface Press F3 to return to the previous setting interface

BACK

RETU

FAULT RE CORD NO. 01

MOTOR PR OTECTIO N

DO1: ON DO 2: ON

DO3: ON DO 4: ON

DO5: ON DO 6: ON

DO7: ON DO 8: ON

DO9: ON DO 10: O N

D15: ON DO 16: O N

(5) Fault reset method

Fault information of single system mainly generates from system1. After disapperance of fault, shift the cursor on RESET FAIL on parameter setting interface 2. Select by 0 and 8, press Xto cancel and press √ to confirm. If select SYS1 and confirm, all faults will be reset.

※ Caution： After finding faults, check carefully the whole system. After eliminating relative fault, reset the unit on premise that there is no security hidden trouble. Otherwise, unit will be destroyed from compulsory reset.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Select the difference series number by pressing the figure keys 0-9 so as to display the faults happened in the different time. The number 0-9 means the orders of faults happened in the different time, the bigger numer means the earlier the faults happened.

Press F4 on the main interface of HMI, the alarming information can be displayed, which can also be realized by pressing keys when on othe interface.

The second line of the display panel shows the detail alarming content.

The third line of the display panel shows the begin and stop time of alarming.

The temperature, status of DI, DO, which shown in the following lines shows the status of chiller when the alarming happens.

(2) Fault Inquiry 2

Press F1 to return to the main interface Press F3 to return to the previous setting interface Press F4 to enter into the next parameter setting interface

FAULT RECORD NO. 01

MOTOR PROTECTION

AI5 DIS.T

AI13 EVAP.P

AI14 DIS.P

AI15 OIL.P

AI16 CURRENT

18.0℃

180Kpa

18.0AMP

BACK

RETU

(3) Fault Inquiry 3

Press F1 to return to the main interface; Press F3 to return to the previous setting interface; Press F4 to enter into the next parameter setting

DI1: ON DI 2: ON

DI3: ON DI 4: ON

DI5: ON DI 6: ON

DI7: ON DI 8: ON

DI9: ON DI 10: O N

FAULT RE CORD NO. 01

MOTOR PR OTECTIO N

BACK

RETU

Page 45

ECL OFFSET

LCL OFFSET

MODBUS ADDRESS

BATTERY BACKUP

PASSWORD

TIME LIMIT

LIMITED HOURS

START/STOP MODE

RUN MODE

CONTROL MODE

LOAD TIME

UNLOAD TIME

CONTR.CYCLE

MIN.RUN TIME

ANTI-RECYCLE

SYS1 FLA

SYS2 FLA

BYPASS VALVE DLY

START PRIORITY

USE ONE SYSTEM

OIL PREHEAT

SYS 1 RUN CTRL.

SYS 2 RUN CTRL.

SYS1 CUR.OFFSET

SYS2 CUR.OFFSET

CLEAR FAULT RECORD

RESET FAIL.

ANTIFREEZE

CLEAR RECORD

DEFAULT DATA

-5.0 – +5.0℃

1 – 255

YES/NO

0 – 9998H

MANUAL/AUTO

AC/ITS/HP

LOCAL/REMOTE/MODBUS

0.5-20.0s

5-60s

120-600s

60.0 ~ 400.0 A

5 – 90 s

AUTO/SYS1/SYS2

DUAL/SYS1/SYS2

YES/NO

AUTO/LOAD/UNLOAD

50 – 150 %

----/YES

----/SYS1/SYS2

YES/NO

----/SYS1/SYS2

----/YES

Service password

User password

Ex-factory password

Service password

User password

Service password

Ex-factory password

Service password

Ex-factory password

User password

Service password

5.5 General parameters setting and defult values

(1) Sharing parameters setting and defult values

0℃

YES

2100 H

MANUAL

LOCAL

2.0s

4.5s

10s

300s

480s

111.0

15s

AUTO

DUAL

YES

AUTO

100%

----

YES

----

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 46

Items

LEL TEMP SET

LEL TEMP CE

LOW LELT

HIGH LCLT

LEP UNLOAD

LEP SHUT DOWN

HOLD LOAD D.P

UNLOAD D.P

HIGH D.P.SHUTDOWN

UNLOAD CURR.

DELTA T

Defult values

7.0℃

1.0℃

2.0℃

43.0℃

175KPa

165KPa

1030KPa

1060KPa

1090KPa

95%

3.5℃

Setting range

4.0~15.0℃

0.5~2.0℃

1.0~7.0℃

30.0~60.0℃

150.0~300.0 KPa

100.0~1300.0 KPa

100.0~1350.0 KPa

10~98%

2.0~6.0℃

Access level

User password

Service password

(2) Assignable parameters setting and defult values (AC mode)

(3) Assignable parameters setting and defult values (ITS mode)

Items

LEL TEMP SET

LEL TEMP CE

LOW LELT

CR BUFFER

HIGH LCLT

LEP UNLOAD

LEP SHUT DOWN

HOLD LOAD D.P

UNLOAD D.P

HIGH D.P.SHUTDOWN

UNLOAD CURR.

DELTA T

LISV TEMP

Setting range

-8.0~+5.0℃

0.5~2.0℃

-15.0~+5.0℃

1.0 – 2.5℃

30.0~60.0℃

80.0~300.0 KPa

100.0~1300.0 KPa

100.0~1350.0 KPa

10~98%

2.0~6.0℃

50.0~80.0℃

Defult values

-5.6℃

1.0℃

2.0℃

2.5℃

43.0℃

175KPa

165KPa

1030KPa

1060KPa

1090KPa

95%

4.5℃

70.0℃

Access level

User password

Service password

User password

Service password

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 47

Items

LCL TEMP SET

CR BUFFER

LCL TEMP CE

LOW LELT

HIGH LCLT

LEP UNLOAD

LEP SHUT DOWN

HOLD LOAD D.P

UNLOAD D.P

HIGH D.P.SHUTDOWN

UNLOAD CURR.

DELTA T

LISV TEMP

Defult values

45.0℃

2.5℃

1.0℃

2.0℃

52.0℃

175KPa

165KPa

1286KPa

1303KPa

1356KPa

95%

4.5℃

80.0℃

Setting range

30.0~50.0℃

1.0~2.5℃

0.5~2.0℃

1.0~7.0℃

30.0~52.0℃

150.0~300.0 KPa

100.0~1400.0 KPa

10~98%

2.0~6.0℃

50.0~80.0℃

Access level

User password

Service password

(4) Assignable parameters setting and defult values (HP mode)

YEWS-E Water Cooling Screw Chiller/Heat Pump

Items

LCL TEMP SET

CR BUFFER

LCL TEMP CE

LOW LELT

HIGH LCLT

LEP UNLOAD

LEP SHUT DOWN

HOLD LOAD D.P

UNLOAD D.P

HIGH D.P.SHUTDOWN

UNLOAD CURR.

DELTA T

LISV TEMP

Defult values

55.0℃

2.5℃

1.0℃

2.0℃

62.0℃

175KPa

165KPa

1660KPa

1680KPa

1745KPa

95%

4.5℃

80.0℃

Setting range

30.0~60.0℃

1.0 – 2.5℃

0.5~2.0℃

1.0~7.0℃

30.0~62.0℃

150.0~300.0 KPa

100.0~1700.0 KPa

100.0~1700.0 Kpa

100.0~1800.0 KPa

10~98%

2.0~6.0℃

50.0~80.0℃

Access level

User password

Service password

(5) Assignable parameters setting and defult values (D1-HP/E-HP2 mode)

Page 48

SYS1 AI14 SENSOR FAULT

SYS1 AI15 SENSOR FAULT

SYS1 HIGH DIS.PRESSURE

SYS1 LOW EVAP.PRESSURE

SYS1 HIGH DIS.T

SYS1 HIGH CURRENT

SYS1 LOW CURRENT

SYS1 HIGH LCLT

SYS1 LOW LELT

System1 The discharge pressure sensor is short circuit or break

System1 The oil pressure sensor is short circuit or break

System1 The discharge pressure exceeds the set value of alarming

Systeml the evaporator pressure is lower than the alarming value

Systeml the discharge temperature is higher than the alarming value

System1 Compressor current is higher than MLA

System1 Compressor current is lower than MLA *5%

The leaving cooling liquid temperature is higher than the

The leaving chilled water temperature is lower than the

Manual

Auto

Manual

Auto

setting value

YEWS-E Water Cooling Screw Chiller/Heat Pump

5.6 Fault imformation

No.

Reset method

Fault information

Fault reason

SYS1 COMM.FAULT

SYS1 FLS OPEN

SYS1 DIS.PRESSURE SW.OPEN

SYS1 OIL SW.OPEN

SYS1 MOTOR PROTECTION

SYS1 EXT.INTERLOCK OPEN

SYS1 Y-△ TRANSITION FAULT

SYS1 AI1 SENSOR FAULT

SYS1 AI2 SENSOR FAULT

SYS1 AI3 SENSOR FAULT

SYS1 AI4 SENSOR FAULT

SYS1 AI5 SENSOR FAULT

SYS1 AI13 SENSOR FAULT

Communication disconnection between the centralized controller and 1# main board

Flow switch open

System1 discharge pressure switch open

System1 oil level switch open

System1 motor protection switch open

Interlock switch open

System1 The discharge temperature sensor is short circuit or break

System1 The evaporating pressure sensor is short circuit or break

Manual

Auto

Manual

ystem1 Star-Delta transformation failed

he leaving cooling water temperature sensor is short circuit or

break

The entering cooling water temperature is short circuit or break

The leaving chilled water temperature sensor is short circuit or break

The entering chilled water temperature sensor is short circuit or break

SYS1 LOW DIFF OIL P

SYS1 CLOGGED FILTER

SYS1 CMPS HF START-STOP

SYS1 HIGH LHLT

System1 compressor High-Frequency start-stop

output heat water temperature exceeds setting value

System1 (Oil pressure - evaporating pressure)<100kPa

System1 (Discharge pressure - oil pressure)>245kPa

Manual

Auto

Page 49

YEWS-E Water Cooling Screw Chiller/Heat Pump

Baud rate

Word length

Parity

Stop bits

Data mode

verify

9600

None

RTU

CRC

5.7 Modbus protocol (1) Modbus protocol instructions

(2) ModBus node list

Address

201

202

203

204

205

206

207

208

209

210

101

102

121

103

122

104

105

106

107

108

109

115

116

117

112

111

Functions

3,6

Description

Start/stop

Mode select

AC: LEL setting

ITS: LEL setting

Heat pump: LHL setting

Alarm

Runtime limit

Oil Pre-heating

CONTROL MODEL

Heat pump: LHL setting

Digital output

Digital input

Zleaving condenser Liquid

Enter condenser Liquid

Leaving evaporator Liquid

Enter evaporator Liquid

Discharge Temperature

Evaporator pressure

Discharge pressure

Oil pressure

Motor current

DI fault

AI fault

RUN fault

Water pump operation time

Compressor operation time

Word length

word

note

Command 1:start, 2:stop Status 0:stop,1:start

0:AC 1:ITS 2:HP 3:REMOTE

Range： 4.0 – 15.0℃

Range：-8.0 – +5.0℃

YEWS-D1 HP Range: 30.0 - 60.0℃

YEWS-E HP2 Range: 30.0 - 60.0℃

1: yes 0: no

0 LOCAL 1 REMOTE 2 MODBUS

YEWS-E HP Range: 30.0 - 50.0℃

See table 4/table 5

Signed binary，the value is multiplied per 10

unsigned binary，the value is multiplied per 10

unsigned binary

unsigned binary，the value is multiplied per 10

See table 1/ table 2/ table 3

accumulative total

System1

Page 50

(3) Definition of fault information in ModBus protocol AI Sensor input fault

Bit

bit0

bit1

bit2

bit3

bit4

bit5

bit6

bit7

bit8

bit9

bit10

bit11

bit12

bit13

bit14

bit15

Fault

Leaving Cooling Liquid Temperature Sensor Failure

Entering Cooling Liquid Temperature Sensor Failure

Leaving Chilled Liquid Temperature Sensor Failure

Entering Chilled Liquid Temperature Sensor Failure

Discharge Temperature Sensor Failure

Leaving Hot Liquid Temperature Sensor Failure

Entering Hot Liquid Temperature Sensor Failure

Evaporating Pressure Transducer Failure

Discharge Pressure Transducer Failure

Oil Pressure Transducer Failure

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 51

DI switch input fault

Bit

bit0

bit1

bit2

bit3

bit4

bit5

bit6

bit7

bit8

bit9

bit10

bit11

bit12

bit13

bit14

bit15

Fault

Flow Switch Open

High pressure Switch Open

Oil level switch open

Motor Protection Switch Open

External Interlock Switch Open

Start-up Failure

Run fault

Bit

bit0

bit1

bit2

bit3

bit4

bit5

bit6

bit7

bit8

bit9

bit10

bit11

bit12

bit13

bit14

bit15

Fault

High discharge pressure cut out

Low Evaporating Pressure Cutout

High Discharge Temperature Cutout

High Compressor Motor Current Cutout

Low Compressor Motor Current Cutout

High leaving cooling water cutout

Low leaving chilled water cutout

Low Differential Oil Pressure Cutout

Oil filter jam

High leaving hot water cutout

High heat outlet temp

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 52

(4) Definition of dig ital input in ModBus protocol

Bit

bit0

bit1

bit2

bit3

bit4

bit5

bit6

bit7

Bit8-15

Switch Input

FLOW SWITCH

DISCHAGE PRESSURE SWITCH

HIGH PRESSURE SWITCH

OIL LEVEL SWITCH

MOTOR PROTECTION

EXT.INTERLOCK

START FAILURE

REMOTE SWITCH

RESERVED

Status

0=open 1=close

(5) Definition of dig ital output in ModBus protocol

Bit

bit0

bit1

bit2

bit3

bit4

bit5

bit6

bit7

bit8

Bit14

bit15

Digital output

CHILLED LIQUID PUMP

COMPRESSOR WYE CONTACTOR

COMPRESSOR DELTA CONTACTOR

COMPRESSOR OIL HEATER

LIQUID LINE BYPASS SOLENOID1

ALARM

LIQUID INJECTING

LIQUID LINE BYPASS SOLENOID2

RUNNING STATUS

CR4 LOAD SOLENOID

CR3 UNLOAD SOLENOID

Status

0=open 1=close

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 53

(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.

Wiring sketch

RS232/RS485 converter

XS08 display

Computer

To com port

RS485 Communication Cable(twisted-pair)

9pin Communication cable

MODBUS address of centralized controller has to be set

and PC can read the data of chillers or operate the chillers

conveniently affer connnecting cables according to the

figure above. These paratmeters must be input in

parameter setting interface-10, as follows.

MODBUS ADDRESS 001

CLEAR RECORD YES

CLEAR FAULT RECORD YES

DEFAULT DATA YES

BATTERY BACKUP YES

PASSWORD YES

TIME LIMIT YES

LIMITED HOURS 2100H

RETU

BACK

Notes:

1. The cable connecting RS232/RS485 converter to

XS08 must be the same one.

2. Communication Cable must be a shield Twisted-pair with character resistance 120±20%Ω , 0.5mm2 cross-

section.

3. Communication Cable must be shorter than 1000m.

4. Port A1 and B1 of XS08 should be connected to the

communication port of PC, and RS232/RS485 converter must be used to connect them. It’s certain to connect

communication cable properly, which is polar, avoiding

to communicaiton fault.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 54

6 COMMISSIONING

6.1 PREPARATION

Commissioning of this unit should only be

carried out by YORK Authorized personnel.

Especially, this section must be read in conjunction with

the control system operation onstruction in section 5.

Power Off

The following basic checks should be made with the

customer power supply to the unit switched off.

Ensure all sources of supply to the unit are

padlocked in the OFF position.

Inspection

Inspect unit for installation damage. If found, take action

or repair as appropriate.

Refrigerant Charge

Packaged units are normally shipped as standard with a

full refrigerant operating charge. Check that refrigerant

pressure is present in the system and that no leaks are

apparent. If no pressure is present, a leak test must be

undertaken, located and repaired the leak(s). These

systems must be evacuated with a suitable vacuum pump/recovery unit as appropriate to below 500μmHg.

Valves

Open diacharge valve on compressor and liquid line angle

valve under condenser fully (counterclockwise) then close

one turn of the stem to ensure operating pressure is fed to

pressure transducers. Open all angle valves on the oil

return line and eductor line.

Isolation / Protection

Verify all sources of electrical supply to the unit are taken

from a single point of isolation.

Control Panel

Make sure the control panle is free of foreign materials

(wire, metal chips, etc.) and clean out foreign materials if

it is found.

Power Connections

Check that the customer power cables are connected

correctly to the circuit breaker. Ensure that connections

of power cables within the panels to the circuit breaker

are tight.

Earthing

Make sure all the protective conductor is properly and

tightly connected to the ground.

Oil heater

Verify that the oil heater is powe on. If the chiller

repowered after it have been power off for more than 15

days, the compressor are not allowed to run unless the oil

heater has been work for more than 5 hours.

Water System

Verify the chilled liquid system has been installed

correctly, and has been commissioned with the correct

direction of water flow through the cooler. The inlet

should be connected to the bottom nozzle of water box of

the cooler and the outlet to the top one. Purge air using

the plugged air vent mounted on the top of water box.

Flow rates and pressure drops must be within the limits

given in the Section 10. Out of these limits is undesirable

and could cause damage.

Low temperature brine chiller

Confirm the freezing point of the evaporator brine fluid.

Using a hydrometer or an optical refractometer to test the

concentration of the birne and figure out the freezing

point. When working on the ITS mode, the LOW LELT/

LEP UNLOAD/LEP SHUT DOWN should be reset.

Make sure the temperature corresponding to the LEP

SHUT DOWN and the LOW LELT setpoint are higher

than the freezing point of brine, and any of these two temperature should be at least 3℃ higher than the brine

freezing point.

WARNING

CAUTION

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 55

The corresponding of concentrations and freezing points of glycol solution

E.G wt%

Freezing point℃

-1.4

-3.28

-5.31

E.G wt%

Freezing piont℃

-7.8

-11.38

-14.04

The saturated temperature of R134a in difference pressure

Pressure kpa

164

171

178

185

193

201

209

Saturated temperature ℃

-15

-14

-13

-12

-11

-10

-9

Pressure kpa

217

225

234

243

253

262

272

Saturated temperature ℃

-8

-7

-6

-5

-4

-3

-2

Pressure kpa

282

293

304

315

326

338

350

Saturated temperature ℃

-1

Flow Switch

Verify a chilled water flow switch is correctly fitted in the

customer s piping on the cooler outlet, and wired into the

control panel correctly using shielded cable.

Control panel pwer supply

Make sure that the control panel is power on and the

display screen can display normarly.

Programmed Options

Make sure all the options factory-programmed into the

Microprocessor Panel are in accordance with the cust-

omer s order requirements by pressing relevant Keys on

the keypad (Refer to instructions on the operation of

control System on section 5).

Programmed Settings

Make sure all the setpoints are in accordance with the

operating requirements by operating keypad (Refer to

instructions on the operation of control System on section

5).The setpoints of the chilled water temperature or hot

water temperature should be set according to the Unit

model and working conditions.

Time and Date

Setting the time/date by pressing relevant function Keys

on the keypad (Refer to instructions on the operation of

control System on section 5).

Startup/Stop arrangement

Setting the Startup/Stop arrangement in ordianary days

and holidays via the corresponding function keys.

(Refer to instructions on the operation of control System

on section 5).

Setpoints

Setting the setpoints and control range of the chilled/hot

water temperature(Refer to instructions on the operation

of control System on section 5).

Now the chiller is ready to work.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 56

6.2 FIRST TIME START-UP

During the commissioning period there should be

sufficient heat load to run the unit under stable

full load operation to enable the unit controls,

and system operation to be set up correctly, and a

commissioning log taken. Be sure that the control

center operatin instructions on section 5 have

been fully understand and the System Start-up

Checklist is completed, Finished the following

operations step by step.

Start-up

Press the“ ”Key on the keypad and there may be a few

seconds delay before the ompressor starts because of the

anti-recycle timer. Be ready to push the Emergency

Switch immediately if any unusual noises or other

adverse conditions appeared during the compressor

starting. Refer to instructions on the operation of control

System on section 5 for the normal operation process.

Oil Pressure

When a compressor starts, inspect the running

information from the Display Panel, and verify that oil

differential pressure (oil pressure-suction pressure)

develops immediately. If oil pressure does not develop,

the automatic controls will shut down the compressor

(Refer to the oil pressure automatic control process on

the operation of control System on section 5). Under no

circumstances should a restart attempt be made on a compressor, which can’ t develop oil pressure

immediately.

WARNING

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 57

7 Operation

7.1 General Description

The units are designed to work independently, or in

conjunction with other equipment via a 485 communic-

ation devices.During operation, the unit controller monitor

the chilled or hot liquid system temperature leaving the

unit and take the appropriate action to maintain this te-

mperature within desired limits.The compressor will aut-

omatically regulate the slide valve position to match the

cooling or heating load of the system.The heat removed

from the chilled liquid is then rejected via the water

cooled condenser.

The following sections give an overview of the operation

of the unit.For detailed information, Refer to detail instr-

uctions on the operation of control System on section 5.

7.2 Start-up

Check the main power supplies to the unit are 'ON', all

refrigerant service valves are open (anti-clockwise one

turn short of fully open) and both chilled and cooling

liquid have a regular flow rate, then press the 'START' key

on the keypad.

The controller will perform a pre-check to ensure that if

there is any the daily/holiday schedule or remote

interlocks to prohibit the unit to run, and all safety cut-

outs are satisfied and the cooling or heating load is

required (i.e.that the chilled liquid temperature is outside

the set limits).Any problems found by the pre-check will

be displayed.If no problems are found and cooling/heating

load is required, the compressor will start.

7.3 Normal Running and Cycling

Once the unit has been started, all operations are fully

automatic.After an initial period at minimum capacity on

the compressor, the control system will adjust the unit

load depending on the chilled liquid temperature and rate

of temperature change. If very little heat load is

present,the compressor will continue at minimum capacity

or performe cycling shutdown to avoid overcooling the

liquid. In that case,the compressor will restart autom-

atically when the liquid temperature rise again.

Once the compressor is running, the evaporated refrigerant

vapor is pumped into the water cooled condenser, which

results in the rise of discharge pressure.

Once the compressor is running the controller monitors oil

pressure, motor current, and various other system

parameters such as discharge pressure, chilled liquid

temperature, etc. Should any problems occurs, the control

system will immediately take appropriate action and display

the nature of the fault (Refer to instructions on the operation

of control System on section 5).

After the chiller stop, the check valve of compressor may

send out some noises, which is caused by the internal

refrigerant equalizing due to the pressure differential.It is a

normal phenomenon and has no influence on the

performance and reliability of chiller.

Oil and Refrigerant

The lubricant should be replaced periodically according to

the advice of York to ensure that the unit can be in normal

running.

The moisture indicating sight glass located in the liquid line

under the condesner should be inspected periodically, please

contact York in time once any moisture is found in the

system.It should be handled by the YORK service personnel

otherwise the compressor will possibly be damaged.

For YEWS100H/130H/170H/200H/210H, the oil sump is

located inside the compressor built-in oil separator, are an

oil drain hole and an oil charge valve at the bottom of the

compressor. In purpose of drain the oil as quickly as

possible, movable joint is used for easier connection to

flexible conduit.

For YEWS100P/130P/170P/200P/215P, the oil sump is

located at the bottom of the oil separator inside of the

condenser. Following picture shows the details for service of the oil sump external connection. It’ s easy to connect

with hose and add lubrica-ting oil quickly. There is no

continuous oil level will exist in the sight glass of the

compressor and the oil filter is on the oil supply line.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 58

If the unit is running with a load lower than 20% rated

load, it may caused the depressing of the oil level due to

the low condensing temperature. In that case, the oil does

not leak out, it is carried out to the condenser by the

refrigerant flow and finally the oil will enter the

evaporator and accumated. However, if the oil in the

evaporator accumulate to a certain amount , it may cause

operation problems.

If the discharge superheat is lower than 5℃, it may cause

some trouble to the oil system. Discharge superheat

temperature is equal to disharge temperature minus to the

condensing temperature.The most suitable refrigerant

charge is decided by the diacharge superheat and the

evaporator approach.

If the unit can not be loaded normally, it is possible that

the lubricant in the evaporator is excessive. Where there is

too much oil in the refrigerant, the liquid level will blister

and the mixture of oil and liquid refrigerant will be

carried to the compressor, which decreases the discharge

superheat.If the discharge superheat decreases to a value lower than 5℃ , the compressor will compulsily unload

and decrease the cooling capacity unless the discharge superheat rise up to 5℃ and keep higher than 5℃ for

more than 60 seconds.

The excessive charge amount of refrigerant will also

decrease the discharge superheat temperature, and cause

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. No attempt should be done

to start the chiller continuously when it is stop due to fault

otherwise it would cause damage to the chiller.

Running log

The running situation should be permanently recorded

according to the regulated time interval in each 24 hour

running cycle.

The following table is the duty record table of WORK for

unit examination.

Please record every data correctly, because it is reference for

engineer to judge the running conditions.The record values

by testing a new unit can be set as the normal situation,

which can be compared with the later record value.

For example, if the difference between the leaving cooling

water temperature and condensing temperature is higher

than the normal value, it shows that the water side of

condenser may be too dirty.

Running detection

By performing the periodical detection and maintenance

according to the value displayed in the display interface of

control center, the operator can avoid the serious running

fault. The following is the guide for detection content and

method.

7.4 Other notes

At any times, the unit will stop once the OFF key in the

keyboard is pressed, then the oil heater will be Powered on

and keep a high oil temperature to prevent refrigerant

dissolving into the oil.

In order to prevent the damage to chiller, the chiller should

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 59

be power on when it is not running for a long period of

time (The compressor oil heat is also powered on).

If the main power has to be cutout in a long period of

service, the discharge service valve must be turn off, and

the oil heater has to run for more than 5 hours(24 hours

suggested) before the chiller starting.

If the chiller is required to close for a long time (such as a

whole winter), the following sections introduce the steps

need to be carried out:

1. It is required to inspect the sealing situation of the

system periodically in the period of long-term stop.

2. If the temperature in standby period is lower than the

water freezing temperature, it is required to drain out all

the water in the cooling tower, condenser, condenser

pump, chilled water system and chilled water pump.

Open the drain pipe in the evaporator and condenser to

ensure the complete drain.

Performing the periodical inspection and maintenance

according to the value displayed in the display panel, the

operator can avoid the serious operating default. The

following is the instructions of inspection content and

operation process.

7.5 Running detection

Performing the periodical detection and maintenance

according to the value displayed in the microcomputer

control center, the operator can avoid the serious running

default. The following detection content and method is a

good guide for user.

Daily

1. Inspect the displayed content of the display screen.

2. If the compressor is in running status, the bearing oil

pressure is required to be inspected.

3. Inspect the inlet and outlet water pressure and

temperature of the condenser so as to compare with those in

the design situation.

4. Inspect the leaving and entering temperature of the

chilled water and evaporator pressure o as to compare with

those in the design situation.

5. Inspect the condenser saturation temperature (confirmed

according to the condenser pressure detected by the

condenser sensor).

6. Inspect the discharge temperature of the compressor. The discharge temperature should be lower than 75℃ in usual.

7. Check that whether the condenser pipe is fouling or

blocking (the difference between the current condenser

approach temperature and the one measured in the new chiller can not exceed 3℃)

8. Confirm whether the water has acceptable quality level.

9. Press Status key for displaying the alarming information

once there is a display requirement.

Weekly

Inspect the refrigerant charged record.

Quarterly

Performing the chemical analysis of the lubricant each 6

months (or perform the frequent inspection according to the

requirement)

Biannually

1. Inspect and replace the cartridge of compressor oil filter.

2. Oil return system

a. Clean the oil filter

b. Inspect the operational situation of ejector for finding the

impurity granule

3. Inspect the controller and safety protection device .

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 60

Date

Tim e

Runing hours

Motor

Evaporator

Condenser

Screw Chiller/Heat-pump Unit Record Table chiller situation:

100～215 TON model:

Compressor

Ambient Tempearature

Yearly (or perform a more frequent inspection

according to the requirement)

1. Clearly drain out and replace the oil in oil separator

tank.

2. Evaporator and condenser

a. Inspect and clean the water drainage valve

b. Inspect and clean the pipes according to the requirements.

3. Inspect and maintain the electrical parts according to the

requirements.

4. Perform the chemical analysis to the system.

Dry-bulb/ Wet -bul

Evaporator pressure kPa

Discharge pressure kPa

Oil level (Seperator/compressor)

Current(A)

Entering Liquid temperature ℃

Leaving Liquid temperature ℃

Flow rate L/S

Liqudi level in sight galss

Entering Liquid temperature ℃

Leaving Liquid temperature ℃

Flow rate L/S

YEWS-E Water Cooling Screw Chiller/Heat Pump

Oil pressure kPa

Page 61

8 MAINTENANCE

8.1 GENERAL REQUIREMENTS

The units have been designed to operate continuously,

provided they are regularly maintained and operated

within the limitations given in this manual. Each unit

should be included in a routine schedule of daily

maintenance checks by the operator/customer, backed up

by regular service inspection and maintenance visits by a

suitably qualified Service Engineer.

It is entirely the responsibility of the owner to provide for

these regular maintenance requirements and/or enter into

a maintenance agreement with a YORK service

organization to protect the operation of the unit. If damage

or a system failure occurs due to improper maintenance

during the warranty period, YORK shall not be liable for

costs incurred to return the unit to satisfactory condition.

This maintenance section applies to the basic unit

only and may, on individual contracts, be

supplemented by additional requirements to cover

any modifications or ancillary equipment as

applicable.

The Safety Section of this manual should be read

carefully before attempting any maintenance

operations on the unit.

8.2 Daily Maintenance

The following maintenance checks should be carried out

on a daily basis by the operator/customer. Please note that

the units are not generally user serviceable and no attempt

should be made to rectify faults or problems found during

daily checks unless competent and equipped to do so. If in

any doubt, contact your local YORK Service Agent.

Unit Status

Press the 'STATUS ' key on the keypad and ensure no

fault messages are displayed (refer to the control center

operation instructions for explanation of messages and the

Trouble shooting section for courses of action).

Refrigerant charging and leaks checking

Refrigerant leaks checking

Periodic refrigerant leak checking must be part of a

comprehensive maintenance program. Leak check the

entire chiller using a calibrated electronic leak detector.

Confirm leaks with soap bubbles that are found using the

electronic leak detector.

Check refrigerant relief valve piping and tube rolled

joints as part of the comprehensive refrigerant leak

checking program.

Repair leaks before adding refrigerant.Visually check the

heat exchangers, compressors and pipework for damage

and gas leaks.

Determining correct refrigerant charge level

The refrigerant charge level is correct when the measured

evaapraror approach and discharge superheat are within

the values listed in Table 8-1.

Liquid refrigerant will be visible in the evaporator sight

glass.The refrigerant level can not be properly

determined by viewing the liquid refrigerant level in the

evaporator sight glass.

All YEWS-E units shipped From1 are charged with the

correct amount of refrigerant.Under some operating

conditions the chiller may appear to be overcharged or

undercharged with refrigerant. Consult with YORK

Factory prior to removing or adding refrigerant.

Definitions

Evaporator approach= (S.E.T)-(L.E.L.T)

Discharge superheat= (C.D.G.T)-(S.C.T)

When:

S.E.T = Saturated Evaporator Temperature

L.E.L.T =Leaving Evaporator Liquid Temperature

C.D.G.T =Compressor Dischrge Gas Temperature

S.C.T = Saturated Condensing Temperature

Refrigerant Charge

Should it become necessary to add refrigerant charge to a

YORK YEWS-E Chiller; add charge until the evaporator

NOTE

WARNING

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 62

CONDITION

COMFORT COOING APPLICATIONS

EVAPORATOR APPROACH

DISCHRGE SUPERHEAT

BRINE(ICE MAKING) APPLICATIONS

EVAPORATOR APPROACH

DISCHRGE SUPERHEAT

R134a REFRIGERANT

1℃~3.5

5℃~15℃

1℃~4.5℃

6℃~20℃

℃

YORK OIL TYPE

L(W)

MOISTURE CONTENT ppm

Total Acid Number mgKOH/ml

< 300ppm

< 0.5

approach and refrigerant gas discharge superheat are at

within the values listed in Table 8-1.

A charging valve is located in the liquid line below the

evaporator. The size of the charging connection is 1/4 inch

male flare. Purge air and non-condensables from the

charging hose. Only add new refrigerant, or refrigerant

that has been tested and certified to meet American Refrigeration Institute Standard (ARI-700).（suitable for model D）

TABLE 8-1 REFRIGERANT CHARGE LEVEL

8.3 Compressor oil

Yearly oil analysis is recommended to verify the

continued use of the compressor oil.

It is very important to take the oil sample after the oil

filter. The oil sample should not be left open to the

atmosphere for more than 15 minutes since it will absorb

moisture from the atmosphere and may yield erroneous

results.

Compressor oil should be changed when the oil analysis

indicates the oil has moisture and acid numbers are in

excess of the limits set in Table 8.2.

TABLE 8.2 – COMPRESSOR OIL LIMITS

The YORK YEWS-E Chiller Compressors use rolling

element bearings (ball and roller bearings); no sleeve

bearings are used. Oil analysis that include metals may

cause confusion when the results are compared to other

equipment that utilize different bearing types. Iron and

copper are examples of metals, which will appear in oil

analysis that include metals. Other metals that may

appear are Titanium, Zinc, Lead, Tin and Silicon. These

metals should be ignored and are acceptable in quantities

of less than 100 ppm. If an oil analysis should indicate

high levels of Iron (more than 300 ppm) combined with

Chromium and Nickel (more than 50 ppm), consult your local YORK Service Office – this could indicate bearing

damage and wear.

Changing Compressor Oil

Compressor oil is changed by draining oil from the oil

sump into a refrigerant recovery container. The oil sump

is under positive pressure at ambient temperatures.

Connect one end of a refrigeration charging hose to the

service valve located at the bottom of the oil sump;

connect the other end to an approved refrigerant recovery

cylinder. Open the valve and drain the oil from the oil

sump.

Charging units with Oil

The Oil Charge

YORK oil types approved for YEWS-E Units and the

quality of oil required is listed in Table 8-3.

UNIT TYPE

YEWS100

YEWS130

YEWS170

YEWS200

YEWS210

YEWS215

OIL TYPE

SYSTEM

QUANLITY(L)

* : HP unit use YORK “W” oil

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 63

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

unless the air is forced out by pumping a few strokes of

the oil pump. Filling the lines with oil to prevent air from

being pumped into the system.

3. Open the oil charging valve and pump appropriate oil

(according the data in oil charge table) into the system.

Then close the charging valve and disconnect the hand oil

pump.

4. As soon as oil charging is completed, closed the power

supply to the starter to energize the oil heater. This will

keep the concentration of regrigerant in the oil to a

minimum.

Oil temperature control

Automatic oil temperature control is accomplished by

liquid injection into compressor/motor assembly. A

solenoid valve will be opened when the discharge

temperature increased to setpoints (only ITS&HP unit

need this function).

8.4 Oil filter

For YEWS100H/130H/170H/200H/210H , a single oil

filter is prov-ided as an standard equipment. Detail

operations refer to the compressor operation and service

manual.

For YEWS100P/130P/170P/200P/215P a replaceable oil

filter is equipped in the external oil supply line(as below

picture) . Please make sure all the valves are in open

status after the replacement of oil filter.

，

YEWS-E Water Cooling Screw Chiller/Heat Pump

8.5 Condenser and Evaporator

General

Maintenance of condenser and evaporator shells is impotant

to provide trouble free operation of the unit. The water side

of the tubes in the shell must be kept clean and free from

scale.Proper maintenance such as tube cleaning, and testing

for leaks, is covered on the following pages.

Chemical water treatment

Since the mineral content of the water circulated through

evaprators and condensers varies with almost every source of

supply, it is possible that the water being used may corrode

the tubes or deposit heat resistant scale in them.

Reliable water treatment companies are available in most

large cities to supply a water treating process which will

greatly reduce the corrosive and scale forming properties of

almost any type of water.

As a preventive measure against scale and corrosion and

prolong the life of evaporator and condenser tubes, a

chemical analysis of water should be made, preferably before

the system is installed. A reliable water treatment company

can be consulted to determine whether water treatment is

necessary, and if so, to finish the proper treatment for

particular water condition.

Condenser and evaporator water side tube cleaning

procedure

Page 64

The standard condenser tubes used in YORK YEWS-E

Chiller/Heat-Pump are internally enhanced copper tubes.

If the equipment is located in an unheated area

that is susceptible to freezing, the water must be

drained from the condenser to prevent tube

failure from freezing.

Proper condenser water treatment can eliminate or

significantly reduce the formation of scale on the

waterside of the condenser tubes.

Maintain a minimum condenser water flow rate through

the tubes of at least 3.33 ft/sec. (1 meter/sec.). Through

tube water velocity should not exceed 12 ft/sec. (3.6

meter/sec.).

Condenser tubes must be maintained to provide proper

chiller operation. Condenser Approach Temperature is a

useful tool to monitor the performance of the condenser.

By recording and logging the Condenser Approach

Temperature as part of the chiller maintenance program,

this will provide a warning that the waterside condenser

tubes are fouled and require cleaning.Condenser

Approach Temperature is the difference between the

Condenser Leaving Water Temperature and the Saturated

Condensing Temperature.

If the approach increases above 5.0℃ , or during the

annual condenser inspection and the tubes are observed to

be fouled, the tubes will require cleaning. For cond-enser

fluids other than water consult with the local YORK Field

Service Office for the correct condenser approach

temperature.

Condenser water side tube cleaning procedure

Two methods are used for waterside tube cleaning to

remove the scale; chemical and mechanical cleaning

procedures. The composition of the scale will determine

which method will be most effective to remove the scale

and dirt.

Consult with the local YORK Field Service Office for a

recommendation of the method(s) used in the local area.

Chemical Cleaning Procedure

Chemical cleaning is an effective method to remove scale

from internally enhanced copper tubes. However, a company

knowledgeable with the chemical cleaning procedure should

be contracted or consulted. Follow the chemical cleaning

company recommendations concerning solution cleaning

strength and time duration of the cleaning process.

Serious damage to thecondenser tubes will result if

the chemical cleaning procedure is improperly

applied.

Mechanical tube cleaning must always follow a

chemical cleaning procedure.

When chemical cleaning of the condenser tubes is required,

it may be necessary to calculate the internal volume of the

waterside condenser tubes. This information is necessary to

properly mix the correct concentration of cleaning solution.

Standard materials of construction for YORK YEWS-E

Chiller condensers is copper tubes and mild carbon steel

water boxes.

Mechanical Cleaning Procedure

1. Drain the water from the condenser.

2. Remove the water boxes from both ends of the condenser.

Use proper lifting equipment when removing the water

boxes. Use caution not to damage the threads on the

mounting studs that are welded to the tube sheet.

3. Select a tube cleaning brush for 3/4 inch I.D copper

condenser tubes. If tubes other than 3/4 inch copper are

used, select a tube cleaning brush that is made for the tube

size. Generally, brushes made of hard plastic or brass

bristled wires are preferred for cleaning copper tubes.

4. Attach the tube cleaning brush to the end of a cleaning

machine or cleaning rod.

5. Flush the condenser with clean water to remove the

debris.

CAUTION

WARNING

YEWS-E Water Cooling Screw Chiller/Heat Pump

WARNING

Page 65

6. Replace the water box gasket with a new gasket and

reassemble the water boxes onto the condenser.

Evaporator tubes

The standard evaporator tubes used in YORK YEWS-E

Chillers are internally enhanced copper tubes.

If the equipment is located in an unheated area

that is susceptible to freezing, the water must be

drained from the evaporator to prevent tube

damage from freezing.

Maintain evaporator water or brine flow rates through the

evaporator tubes that the chiller was designed for. Refer to

the engineering data on the sales order form for the

correct flow rates. Generally, the water or brine that is

circulated through the evaporator is part of closed loop

circuit that is treated with chemicals to prevent the

formation of scale and debris.

Evaporator

It is difficult to determine by a particular test whether

possible lack of performance of water evaporator is due to

fouled tubes alone or due to a combination of troubles.

Trouble which may be due to fouled tubes is indicated

when, over a period time, the cooling capacity decreases

and the split (temperature difference between the water

leaving the evaporator and the refrigerant temperature in

the evaporator) increases. A gradual drop off in cooling

capacity can also be caused by a gradual leak of

refrigerant from the system or by a combination of fouled

tubes and shortage of refrigerant charge. An excessive

quantity of oil in the evaporator can also contribute to

erractic performance.

If cleaning of the evaporator tubes is required, follow the

condenser cleaning procedure.

8.6 Checking System For Leaks

Leak Testing During Operation

The refrigerant side of evaporator is carefully pressure

test and evacuated at factory.

WARNING

After system is operated under load, the high pressure

components should be carefully leak test with a leak

detector to be sure all joins are tight.

If a leak exits, frequent purging will be required or

refrigerant will be lost.

If any leaks are indicated, they must be repaired

immediately. Usually, leak can be stopped by tightening

flare nuts or flange bolts. However, if it is necessary to

repaired a weld joins, the refrigerant charged muse be removed. (See the “Handling Refrigerant for Disma-ntling and Repair” Section of the Maintenance Section in this

manual).

Conducting R-134a Pressure Test

With the R-134a charge removed and all known leaks

repaired, the system should be charge with a small amount

of R-134a mixed with dry nitrogen so that a halide torch or

electronic leak detector can be used to detect any leaks too

small to be found by soap test.

To test with R-134a, proceed as follows:

1. With no pressure in the system, Charge R-134a gas and

dry nitrogen into the system through charge valve to a

pressure of 150PSI..

2. To be sure that the concentration of refrigerant has

reached all parts of the system, slightly open the oil

charging valve and test the presence of refrigerant with a

leak detector.

3. Test around each join and factory weld. It is important

that this test is thoroughly and carefully done, spending as

much time as necessary and using a good leak detector.

4. To check for refrigerant leaks in evaporator and

condenser, open the vents in the condenser and evaporator

heads and test for presence of refrigerant. If no refrigerant is

present, the tubes and tube sheets can be considered tight. If

refrigerant is detected at the vents, the head must be

removed, the located (by means of soap test or leak

detector)and repaired.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 66

5. When absolute tightness of the system has been

established, blow the mixture of refrigerant and nitrogen

through the charging valves

8.7 Evacuation And Dehydration Of Unit

Vacuum Dehydration

Should the chiller be opened to the atmosphere for

lengthy repair or service, follow the Vacuum Dehydration

Guidelines to ensure that all air, moisture and non-

condensable gases are removed prior to placing the chiller

into service.

Vacuum Testing

The vacuum test should be conducted as follows:

1. Connect a high capacity vacuum pump, with indicator,

to the system charging valve.

2. Open wide all system valves, including the purge and

gauge valves. Be sure all valves to atmosphere are closed.

3. Operate the vacuum pump until a wet bulb temperature of 0℃ or a pressure of 5mm Hg is reached.

4. To improve evacuation circulate hot water(not to exceed 52℃ ) through the evaporator and condenser tubes to

thoroughly dehydrate the shells. If a source of hot water is

not readily available, a portable water heater should be

employed. DO NOT USE STEAM.A suggested method is

to connect a hose between the source of hot water under

pressure and evaporator heat drain connec-tion, out the

evaporator vent connection, into the conde-nser heat drain

and out the condenser vent. To avoid the possibility of

causing leaks, the temperature should be br-ought up

slowly so that the tubes an shell are heated evenly.

5. Close the system charging valve and stop valve bet-

ween the vacuum indicator and the vacuum pump. then

disconnected the vacuum pump leaving the vacuum ind-

icator in place.

6. Hold the vacuum obtained in step3 in the system for 8

hours; the slighter rise in pressure indicates a leak or the

pressure of moisture, or both. If, after 8hours the wet bulb temperature in the vacuum indicator has not risen above 5℃

or a pressure of 6.3mm Hg, the system may be cons-idered

tight.

Be sure the vacuum indicator is valved off while

holding the system vacuum and be sure to open the

valve between the vacuum indicator and the system

when checking the vacuum for the 8 hours period.

7. If the vacuum does not hold for 8 hours with the limits

specified in step 6 above, the leak must be found and

repaired.

8.8 working conditions

Reading the working pressure and temperature from the display panel by pressing the “ display” key. Comfirm

that whether these value is within the working limits.

8.9 Scheduled Maintenance

The maintenance operations detailed in the following table

should be carried out on aregular basis by a suitably

qualified Service Engineer, It should be noted that the

interval necessary between each 'minor' and 'major' service

can vary depending on, for instance, application, site

conditions and expected operating schedule. Normally a

minor 'service' should be carried out every three to six

months and a 'major' service once a year.It is recommended

that your local York Service Centre is contacted for

recommendations for individual sites.

NOTE

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 67

9 TROUBLE SHOOTING

9.1 System Trouble Shooting Analysis

Possible Cause

1. Symptom: Low suction pressure

Faulty the pressure sensor

Faulty the chilled water temperature sensor

Evaporator tubes dirty or scaled

Insufficient evaporator water flow

Improper value set of “LOW LELT” or "LEP SHUN DOWN"

Compressor not start from min load

Slide valve out of control

Low suction pressure

Insufficient refrigerant charge

Insufficient load for system capacity

2. Symptom: Oil level switch trip

Refrigerant overcharged

Faulty oil level switch

Faulty oil heater Oil filter(outside the compressor) clogged Compressor not start from min load

Insufficient load for system capacity

Identification

Abnormal pressure value observed in panel

Abnormal temperature difference between leaving chilled water and evaporation temperature Temperature difference between leaving chilled water and evaporation temperature greater than normal with normal discharge temperature Temperature difference between evaporator water on and water off higher than nomal “ LOW LELT” set should be greater than th e sa turat ion te mpera ture calc ulate d according to"LEP SHUN DOWN" set Motor current greater normal after the StarDelta transfer No unloading action while there is unloading demand

Temperature between leaving chiller water and cooling water is small and suction pressure drop with the loading of compressor Temperature difference between leaving chilled water and evaporation temperature greater than normal with high discharge temperature Temperature of chilled water too low with low motor amperes

Chiller tripped in high frequency with low discharge superheat

The oil is full in the bottom sightglass but the oil level switch is open No oil superheat in the oil sink Notable temperature difference observed before and after the oil filter Motor current greater than normal after the chiller started with low discharge superheat

Temperature difference evaporator water on and water off very small

Remedy

Change pressure sensor

Change chilled water temperature sensor

Clean evaporator tubes, Check water conditioning

Increase the quantity of water through the evaporator to proper value Reset the new“ LOW LELT” or "LEP SHUN DOWN" to proper value

Check compressor slide valve and slide valve solenoid valve "Check compressor slide valve and slide valve solenoid valve;Set the compressor unloading time to proper value" I n c r e a s e t he c o n d e s n e r w ater temperature

Check for leaks and charge refrigerant into system

Check slide valve operation and setting of low water temperature cutout

Re co ve r refrigerant t o make the discharge superheat and the subcooling to proper value Change oil level switch

Change oil heater Clean the oil filter

Check compressor slide valve and slide valve solenoid valve;Set the compressor unloading time to proper value Increase compressor min operation current set

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. Be aware of this possibility and avoid solving the "Wrong problem"

When an operating problem develops, compare all operating information on the OPERATING DISPLAY with normal

operating conditions. If an Operating Log has been maintained, the log can help determine what constitutes normal

operation for the compressor unit in that particular system.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 68

Cooling water temperature too low

Jet or orifice of oil eductor clogged

Insufficient oil charge

Overcharged oil

Cooling water temperature too high

Condenser tubes dirty or scaled

Insufficient condenser water flow

Faulty compressor discharge valve

Faulty discharge pressure sensor

Air in condenser

Cooling water temperature too low

Faulty oil pressure or evaporation pressure sensor

Oil filter(inside the compressor) clogged Faulty discharge pressure or oil pressure sensor

Cooling water temperature too high

Condenser tubes dirty or scaled

Insufficient load for system capacity

Over charged with refrigerant

Refrigerant saturated with oil

Over charged with oil

Slide valve fail to unload

Wrong value of LOW LELT

Compressor load too speedy Wrong value of CUR.OFFSET

Low discharge superheat with low leaving cooling water temperature No notable temperature difference on the oil eductor Oil level is low while the chiller operating in nomal condition High oil level with evaporator foaming

High condenser water temperature

Temperature difference between refrigerant and water off of condenser greater than normal Temperature difference between condesner water on and water off higher than nomal,with nomal evaporator pressure High discharge pressure or the High discharge pressure switch tripped Abnormal discharge pressure observed in the panel Temperature di ff er en ce b et we en l iq ui d refrigerant temperature and water off condenser higher than normal

Pressure difference between oil pressure and discharge pressure too small Abnormal oil or discharge pressure observed in the panel

Pressure difference between oil pressure and discharge pressure greater than 200 kPa Abnormal oil or discharge pressure observed in the panel

High condenser water temperature

Temperature di ff er en ce b et we en l iq ui d refrigerant temperature and water off condenser higher than normal High discharge superheat with low motor amperes

Low discharge superheat with foaming in oil separator Ev apora tor fo aming a nd low discha rge superheat High oil level with evaporator foaming

Motor current greater than normal when the chiller stop

“ LOW LELT” set falling within chiller cycling region

Unloading time set too big Current showed in panel greater than the lab test

Increase condenser water temperature

Change oil filter and oil eductor

Charge oil into compressor

Recover some oil from compressor

Reduce condenser water inlet temperature.(Check cooling tower and water circulation) Clean condenser tubes.Check water conditioning Increase the quantity of water through the condenser to proper value

Check the compressor discharge valve

Change pressure sensor

Purge unit

Increase condenser water temperature

Change pressure sensor

Change oil filter

Change pressure sensor

R e duce c ond ense r w a t er i n l e t temperature.(Check cooling towen and water circulation) Clean condenser tubes

Increase compressor min operation current set

Adjust charge

Perform oil recovery and check oil levels

Adjust oil charge

"Check compressor slide valve and slide valve solenoid valve;Set the compressor unloading time to proper value" Adjust water temperature set value

Adjust compressor loading time set Adjust current offset to proper value

4. Symptom: Insufficient oil supply pressure

5. Symptom: The difference of discharge pressure and oil pressure is too high

6. Symptom: High discharge temperature

7. Symptom: Low discharge superheat

8.Symptom: Low chilled water temperature

9. Symptom: Motor over current

3.Symptom: High discharge pressure

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 69

Temperature

Resistance KΩ

Temperature℃

Resistance KΩ

℃

-5

42.82

14.3

-3

38.53

13.1

-1

34.57

11.96

31.32

10.93

28.29

25.59

9.16

23.17

8.4

21.01

7.71

19.07

7.085

17.33

6.517

15.77

Discharge temperature sensor

Temperature

Resistance KΩ

Temperature℃

Resistance KΩ

℃

166.75

35.272

142.9

31.076

122.81

27.44

105.83

24.283

91.443

21.535

79.219

19.137

68.804

17.042

59.908

15.206

52.291

13.595

45.752

12.178

40.125

10.929

9.2 Sensor Calibration Charts

Chilled leaving liquid temperature, chilled return liquid temperature, leaving cooling liquid temperature, returning

cooling liquid temperature sensors:

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 70

10.1 Unit physical parameters

YEWS100

YEWS130

YEWS170

YEWS200

YEWS215

Unit Model

EVAP

100

125

150

Connection Flange mm Unit Size mm

COND

100

125

150

Length

2595

3030

3055

3080

4215

Width

1280

1350

1430

1620

Height

1820

1865

1885

2085

YEWS-E Water Cooling Screw Chiller/Heat Pump

10 TECHNICAL DATA

10.2 Water pressure drop

Page 71

10.3 Physical datas

10.4 Starting/Operation limits of unit

AC chiller starting Range

AC chiller operation Range

Cooling Water Temp IN-℃

Chilled Water Temp IN-℃

YEWS-E Water Cooling Screw Chiller/Heat Pump

100 120 130 150 220

YEWS100 YEWS130 YEWS170

YEWS200/210

YEWS215

Unit

Capacity

Control %100

Water

Volume per

Evaporator L

Water

volume per

condenser L

Operating

Weight

Shipping

Weight

129 146 187 236 520

2800 3450 3650 3980 5700

3200 3950 4150 4480 6750

1 1 1 1 1

17 25 30 33

1 1 1 1 1

25~100 25~100 25~100 25~100 25~100

126 135 156 196 530

Lubrication

Charge (L)

Refrigerant

Circuit NO.

Refrigerant Charge(kg)

Qty

Page 72

ITS unit starting Range

HP unit staring Range HP unit operation Range

Chilled Water Temp IN-℃

Cooling Water Temp IN-℃

ITS unit operation Range

Cooling Water Temp IN-℃

Chilled Water Temp IN-℃

YEWS-E Water Cooling Screw Chiller/Heat Pump

Chilled Water Temp IN-℃ Chilled Water Temp IN-℃

Unit Starting Range

Ⅰ Staring range under cooling mode Ⅰ+Ⅲ Starting range under HP mode Ⅰ+Ⅲ+Ⅳ Starting range under HP2 mode Ⅱ Extra starting range after equipped with three-

way valve to maintain the required condenser pressure.

Unit operating range Ⅰ/Ⅲ/Ⅳ Operating range based on 5℃ water temperature approach for both evaporator and condenser.

Ⅰ Full load operation range under cooling mode Ⅰ+Ⅲ Full load operation range under HP mode Ⅰ+Ⅲ+Ⅳ Full load operation range under HP2 mode Ⅱ Extra full load operation after equipped with three-way

valve to maintain the required condenser pressure. Note: HP unit can meet the highest 50 ℃ hot water needs. HP2 unit can meet the highest 60 ℃ hot water needs.

Page 73

10.5 Foundation Diagram

Rubber Isolator Pad Layout

Spring Isolator Layout

Model YEWS1 00 YEWS1 30 YEWS1 70 YEWS2 00 YEWS2 15

A(mm)

1822 2427 2427 2427 3494

B(mm)

1280 1280 1350 1430 1620

C(mm)

2332 2937 2937 2937 4004

D(mm)

1368 1368 1438 1518 1708

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 74

10.6 Dimensions

YEWS130

YEWS170

YEWS200

YEWS215

YEWS100

2595

1280

1820

500

483

135

145

320

D1/D2(mm)

3030

3055

3080

4215

1280

1350

1430

1620

1865

1885

2035

500

540

545

605

483

508

545

135

155

165

180

145

165

180

320

345

370

405

320

330

345

405

YEWS-E Water Cooling Screw Chiller/Heat Pump

YEWS130/170/200/215

Page 75

11 SPARE PARTS

11.1 Recommended Spares

It is recommended that the following common spare parts

are held for preventative of corrective maintenance

operations.

Other spare parts vary depending on the unit model.

Contact your local York Sales and Service Centre for

information and please quote the unit model number and

serial number.

When ordering spare parts, we will require the following

information to ensure the correct parts are supplied:

Full unit model number, serial number, application and

details of the parts required.

All requests for parts should he made to your local York

Sales and Service Centre.

11.2 Recommended Compressor Oils

The correct type of oil must be used in the unit as shown

on the unit data plate and labels. Standard units use the

following oil and refrigerant:

Oil: YORK ”L” lubricating oil is used in the AC/ITS units while YORK ”W” lubricating oil is used in the

HP units.

Refrigerant: Only the R134a refrigerant can be used.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 76

12 DECOMMISSIONING,DISMANTLING AND DISPOSAL

12.1 General description

Never release refrigerant to the atmosphere when

emptying the refrigerating circuits. Suitable

retrieval equipment must be used. If reclaimed

refrigerant cannot be reused. It must be

Enteringed to the manufacturer.

Never discard used compressor oil, as it contains

refrigerant in solution. Entering used oil to the

oil manufacturer.

Unless otherwise indicated, the operations described bel-

ow can be performed by any properly trained mainten-

ance technician.

Isolate all sources of electrical supply to the unit including

any control system supplies switched by the unit. Ensure

that all points of isolation are secured in the 'OFF'

position. The supply cables may then be disconnected and

removed. For connection points refer to Section 4.

Remove all refrigerant from each system of the unit into a

suitable container using a refrigerant reclaim or recovery

unit.This refrigenmt may then be re-used, if appropriate,

or Enteringed to the manufacturer for disposal. Under NO

circumstances should refrigerant be vented to atmosphere.

Drain the oil from each system into a suitable container

and dispose of according to local laws and regulations

governing the disposal of oily wastes. Any spill oil should

be mopped up and similarly disposed of.

Isolate the unit heat exchangers from the external water

systems and drain the heat exchanger section of the

systems. If no isolation valves are installed it may be

necessary to drain the complete system.

After draining, the water pipework can be disconnected

and removed.

Units can generally be removed in one piece after

disconnection as above. Any mounting bolts should be

removed and then the unit should be lifted from position

using the points provided and equipment of adequate

lifting capacity.

Reference should be made to Section 4 for unit

installation instructions, Section 9 for unit weights and

Section 3 for handling.

Units which cannot be removed in one piece after

disconnection as above must be dismantled in position.

Special care should be taken regarding the weight and

handling of each component.Where possible units should

be dismantled in the reverse order of installation.

Residual refrigerant oil and glycol or similar

solutions may remain in some parts of the

system. These should be mopped up and

disposed of as described above.

It is important to ensure that whilst components are being

removed the remaining parts are supported in a safe

manner.

Only use lifting equipment of a dequate capacity.

After removal from position the unit parts may be

disposed of according to local laws and regulations.

WARNING

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 77

13.1 Application

This switch, a SPDI type flow switch, is a kind of relay

used for inspecting and observing liquid flow. Normally, it

is applied to air flow adjustment and water supply equi-

pments and induction flow channels where there is flow

variation such as water, ethane, ethanediol and other non-

hazardous liquids. Its typical application is where linkage

or cut-out protection is needed.

13.2 Parameters

Maximum working pressure: 1.6MPA, connector size: 1”NPT, 3/4 ”NPT and 1/2 ”NPT With three-way pipe

connector.

13.3 Flow adjustment range and media temperature

range

18L/min-2000L/min (standard)

5L/min-3000L/min (non-standard)

-45℃-120℃

This switch shall not be used in pipes where freezing is

possible. The flow switch is designed to be used as a

controller. Failure of its controlling function may result in

personal injury and/or property damages. The managerial

personnel shall be responsible for installing protection

devices (safety device and restriction controller), or

adding alarm and monitor systems to guard against its

failure.

The controller shall not be used for load in excess

of the ratings as shown in the controller label.

13.4 Installation

In order to sense the flow variation, its flap shall not be in

contact with the pipe wall, neither with any throttle

devices in the pipe.

Danger of incorrect operation.

The switch has been set to the minimum flow at the plant,

which shall not be exceeded during adjustment as it may

result in the switch's failure to reset to no flow position.

The HF68 flow switch MUST be installed in a linear pipe

13 INSTALLATION INSTRUCTIONS FOR THE HF68 FLOW SWITCHES

at both sides of which there MUST be a linear length

with at least five times of the pipe diameter. When a

switch is installed, its wiring terminals must be

accessible.

The switch should be installed in a position easy for

wiring, normally within the outlet stop valve for the

convenience of maintenance.

It is suggested to install the flow switch in the following

steps:

1. Drill the water pipe with the hole size 3-4mm larger

than the outer diameter of the steel connector.

2. Weld the steel connector to the hole of the water pipe.

3. Tighten the switch on the steel connector with a flat

wrench. Note: DO NOT tighten it with the switch

housing.

4. Ensure that no part is in contact with the pipe wall or

its activity is not obstructed.

5. Adjust the water flow to the minimum design flow

with an adjusting screw. The on/off action and the arrow

on the housing MUST point at the flow direction.

The steel connector MUST be welded directly on

the water pipe. The steel pipe shall not be welded

to the water pipe to connect the steel connector.

The steel connector MUST be the one provided

by YORK which is included in the water flow

switch packaging box. No use of this connector

may result in flow switch explosion.

The flow switch shall not be subject to water hammer. If

a snap cut-off valve is installed on the downstream of the

flow switch, appropriate water hammer proofing devices

MUST be used.

13.5 Wiring

All wiring can adopt only copper conductors and NEC or

local regulations MUST be observed. HF68 has color

WARNING

CAUTION

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 78

leads with the red one as the center line. When the flow

increases, the red line contacts the yellow line; when the

flow decreases, the red line contacts the blue line. Use

supplied terminal screws for wiring. Use of other screws

may result in improper wiring.

No power shall be supplied during wiring to

guard against electric shocks or damages to the

equipment.

13.6 Steps to adjust the flow switch settings

1. Remove the HF68 housing.

2. Turn the adjusting screw clockwise to increase the flow.

If the flow needs to be decreased, turn the adjusting screw

anticlockwise.

3. Press the main lever for a few times to ensure the flow

switch setting is no less than the EXW setting. If there is

no click sound when the lever is Enteringed, turn the

adjusting screw clockwise until click sound appears.

If the water flow switch is used in chilled water

pipes, ensure its insulation as described in Water

Flow Switch Manual.

The water flow switch is set to the minimum at

the plant. It is forbidden to set it below the EXW

setting. Otherwise, it may cause that the flow

switch cannot reset during water cut-out.

CAUTION

WARNING

You MUST carefully read HF68 Flow Switch Manual before installing the flow switch and follow the instruction

strictly. If you have any question, please contact the nearest YORK Maintenance Center.

YEWS-E Water Cooling Screw Chiller/Heat Pump

Page 79

YEWS electrical drawing – compressor for 50Hz power

Page 80

YEWS electrical drawing – main board (YEWS100H/130H/170H/200H/210H) for 50Hz power

Page 81

YEWSelectrical drawing – main board (YEWS215P) for 50Hz power

Page 82

YEWS electrical drawing-Main Board(YEWS100P/130P/170P/200P)for 50Hz power

Page 83

YEWS electrical drawing – compressor for 60Hz power

Page 84

YEWS electrical drawing – main board (YEWS100H/130H/170H/200H) for 60Hz power

Page 85

YEWS electrical drawing – main board (YEWS215P) for 60Hz power

Page 86

YEWS field connection for 60Hz power

Page 87

Transformer for230V/3P/60Hz Application

Page 88

Form No:AP1105-IOM01(1216) EN Supersedes:AP1105-IOM01(0316) EN

Johnson Controls YEWS Series, YEWS100, YEWS200, YEWS210, YEWS130 Installation, Operation And Maintanance Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual