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

...

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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.

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

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.

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

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

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

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

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

(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

(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

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

Specifications and Main Features

Frequently Asked Questions

User Manual