| Вид документа | Інструкція |
|---|---|
| Виробник | JCI |
| Моделі | YLCS 0350SA/HA/AA to 1120SA/HA/AA (models 0350, 269, 0480, 344, 381, 400, 0660/0670, 0725/0750 |
| Група обладнання | other |
| Мова документа | англійська |
| Розмір файлу | 3.1 МБ |
Про документ
York YLCS screw chillers cool water or glycol solutions for air conditioning installations. Models are available in three versions: standard units (SA), units for high condensing temperatures (HA) and units with remote air-cooled condensers (AA). All models consist of 2 screw compressors with integral oil separators in separate refrigerant circuits, a dual circuit shell and tube DX evaporator, and — on SA & HA models — single circuit water cooled condensers.
Ключові дані
| Refrigerant | R134a |
|---|---|
| Power supply | 400 V, 3 Ø, 50 Hz nominal (360 to 440 V) |
| Chilled liquid outlet temperature (water) | 4.5 to 15 °C |
| Liquid outlet temperature (glycol) | -12 to 15 °C |
| Air temperature surrounding unit | 4 to 46 °C |
| Cooler waterside maximum working pressure | 10 barg |
| Compressor type | Twin helical semi-hermetic rotary screw, 2950 rpm (50 Hz) |
| Capacity control range | approximately 30% to 100% per compressor (steps 15, 27, 39, 51, 63, 75, 87, 100 %) |
Застосування
- Cooling of water or glycol solutions for all types of air conditioning installations
- Heat pump applications (with Heat Pump Sensor Kit, YLCS HA only)
Особливості
- Microprocessor controls: 40 character LCD display, colour coded 35 button sealed keypad, Imperial or Metric units display
- Motor current protection: high current trip at 115% FLA (9 s) or above 105% FLA for 30 s; low motor current protection below 15% FLA
- Motor protector module with thermistors in motor windings (opens above 110°C, re-closes at 75°C); phase rotation relay per power section
- Panel enclosures designed to IP42, powder painted galvanised steel; IP54 available as option
- Options include: closed transition star/delta starter, power factor correction to 0.95, flow switch, suction shut-off valves, low temperature evaporator kits, pressure relief serviceable valve kits, sequence controller, printer, mechanical gauge kit, anti-vibration mounts, E-Link gateway (BACnet, MODBUS, LON, N2), BAS interface (4–20 mA, 0–10 Vdc, dry contact; YORK ISN via RS485 PWM)
- Emergency stop device (QCSD/ESD) removing the 230 Vac supply to the control system
Технічні дані
| Parameter | Value |
|---|---|
| Refrigerant | R134a |
| Compressor oil | York Grade "L" Oil (York Grade L) |
| Compressor type | Twin helical semi-hermetic rotary twin screw, direct drive, integral oil separator |
| Compressor motor speed | 2950 rpm (50 Hz) |
| Compressor design working pressure | 28 kg/cm² |
| Compressor immersion heater | 300 watt (230 V 1 Ø 50 Hz), temperature activated |
| Motor starting | star/delta open transition (standard) or star/delta closed transition (optional); inrush limited to approximately 33% LRA |
| Condenser type (SA & HA) | Cleanable shell and tube, seamless external finned 19 mm OD copper tubes; removable steel water heads |
| Condenser design working pressures | 10 bar g waterside / 30 bar g refrigerant side (SA & HA) |
| Evaporator type | 2 pass dual circuit shell and tube DX; insulated with flexible closed-cell foam |
| Evaporator waterside design working pressure | 10 bar g |
| Evaporator refrigerant side design working pressure | 20 bar g (models 0350 to 0670 and 1120), 24 bar g (models 0750 to 0980) |
| Remote condenser system Design Working Pressure (AA) | at least 27.6 barg |
| Remote condenser discharge pressure requirement | at least 4.0 bar above suction pressure |
| Liquid subcooling required on arrival at unit (AA) | 4 °C to 10 °C |
| Panel enclosure ingress protection | IP42 standard, IP54 option |
| Power supply | 400 V, 3 Ø, 50 Hz nominal; min 360 V, max 440 V |
| Voltage-free contact rating | 125 VA (max voltage 254 Vac, 28 Vdc) |
| Control supply load (multi point) | 3 A at 400 V; internal fuse class aM 10; max customer fuse 16 A |
| Fouling factor basis | 0.044 m² °C/kW (0.00025 ft²hr°F/Btu) |
| Recommended chilled water pH | between 7 and 8.5 |
| Glycol operation | leaving cooler temperatures below 4.5 °C; HA/AA models only |
| Operating weights (SA-HA) | 3420 kg (0350) … 6610 kg (1120) |
| Operating weights (AA) | 3090 kg (0350) … 5710 kg (1120) |
| Dimensions length × height | 3225 × 2100 mm (0350) to 4000 × 2145 mm (1120) |
| Sound power level SWL | 93 dB(A) (0350–0480), 95 dB(A) (0530–0750), 101 dB(A) (0860–1120) |
| Warranty period | eighteen months from delivery |
| Storage temperature limits | not below 4 °C nor above 46 °C |
| Lifting lug set part number | 026L00261-000 |
| Anti-vibration mount kit | kit 362L18081 (models 0350 to 0670); kit 362L18733 (models 0750 to 1120); 25 mm deflection spring mounts |
| Flow switch | 1 inch BSP thread, suitable for 10 barg DWP, gold contacts |
| Parameter | Value |
|---|---|
| Nominal running amps, unit, SA model 1120 @ 380 V | 379 A (without PFC) / 351 A (with PFC) |
| Nominal running amps, unit, HA/AA model 1120 @ 380 V | 460 A (without PFC) / 426 A (with PFC) |
| System power per compressor (e.g. YTS M-A-H, economised) | 108 kW nominal / 120 kW max running power (SA); 130 kW nominal / 210 kW max (HA/AA) |
| Locked rotor conditions, YTS M-A-H (Star for Star/Delta table): Star AMPS | 467 A (380 V) / 492 A (400 V) |
| Locked rotor conditions, YTS M-A-H (Star for Star/Delta table): Star/Delta AMPS | 1400 A (380 V) / 1475 A (400 V) |
| Standard non-fused disconnect switch rating (SA) | Ie 500 A, M10 lug (YLCS 0350–0980); Ie 630 A, M12 (YLCS 1120) |
| Max IEC 269-2-1 gG fuse (SA, standard) | 125–355 A depending on model/system |
| Conditional short-circuit current of fused disconnect switch | 50 kA |
| Circuit breaker short-circuit trip | 4× In within 60 ms |
| Model | Compressors (circ. 1 / circ. 2) | Evaporator type | Condenser type | Victaulic evaporator conn. |
|---|---|---|---|---|
| 0350 | YTS FAD / YTS FAD | DED315 | CDEW240 (×2) | 5" |
| 0480 | YTS HAE / YTS HAE | DED535 | CDEW300 (×2) | 6" |
| 0620 | YTS JAG / YTS IAF | DED585 | CDEW450 (×2) | 6" |
| 0750 | YTS JAF / YTS JAF | DED715 | CDEW550 (×2) | 8" |
| 0980 | YTS MAH / YTS LAG | M200 | CDEW550X (×2) | 10" |
| 1120 | YTS MAH / YTS MAH | M240 | CDEW550X (×2) | 10" |
Варіанти замовлення
Nomenclature example: YLCS0350SA50YAA — base product (Y: York, L: Liquid, C: Chiller, S: Screw); unit designator (S: Standard Unit, H: High Condensing Temperature, A: Remote Condenser); refrigerant (A: R-134a); voltage/starter (5 0: 380-415 / 3 / 50, Y: Star Delta); design series (A: Design Series A).
Power connection variants:
- Single Point – System Fused Disconnect Switches (standard)
- Single Point – System Circuit Breakers (option; input terminal block, not available on YLCS0955, 1050, 110 HA & AA)
- Multi Point – System Circuit Breakers (option)
Other options as listed under Special features.
Допуски та стандарти
- ISO 9001 accredited design and manufacturing organisation
- Machinery Directive (2006/42/EC)
- EMC Directive (2004/108/EC)
- Safety Code for Mechanical Refrigeration EN378-2 (2008)
- Pressure Equipment Directive 97/23/EC, CE marking
- NES713 Issue 3 (1991): thermal/acoustic materials toxicity index <10, non-hazardous, non-toxic
- BS 476 pt 7 Class 1 flammability rating (thermal/acoustic materials)
- Optional ISO EN1092-1 type 01.A welded flanges; EN1092-1 Type 01.A welded/companion flange kits
- Relief pipework sizing reference: EN13136
- Overcurrent protection per EN 60204; contactor co-ordination TYPE 1 to EN 60947-1:1992; fuses to IEC 269-2-1 gG
- Sound pressure values to ISO 3744; sound data per EN 292-1991
Текст документа
YLCS - SA, HA & AA MODELS
INSTALLATION, OPERATION & MAINTENANCE Revision 5 035L02630-100 (0410)
WATER COOLED LIQUID CHILLER AND
REMOTE AIR COOLED CHILLER
R134a
035L02630-100 Rev.5 (0410)
Contents
1 SUPPLIER INFORMATION 5 4 INSTALLATION 22
1.1 Introduction 5 4.1 Location Requirements 22
1.2 Warranty 5 4.2 Installation of Vibration Isolators 22
1.3 Safety 5 4.3 Pipework Connection 22
1.4 Responsibility for Safety 5 4.4 Water Treatment 23
1.5 About this Manual 6 4.5 Pipework Arrangement 24
1.6 Misuse of Equipment 6 4.6 Connection Types & Sizes 24
1.7 Emergency Shutdown 7 4.7 Refrigerant Relief Valve Piping 24
1.8 Safety Labels 7 4.8 Condenser Cooling Liquid Systems 25
1.9 Material Safety Data 8 4.9 Remote Refrigerant Condenser Systems 25
2 PRODUCT DESCRIPTION 11 4.10 Electrical Connection 26
2.1 Introduction 11 4.11 Power Wiring 27
2.2 Compressor 11 4.12 Output Signals 28
2.3 Refrigerant Circuits 13 4.13 System Inputs 28
2.4 Condenser (SA and HA Models) 13 4.14 Power Supply Connections 30
2.5 Cooler 13 4.15 Connection Diagram 32
2.6 Power and Control Panels 13 5 COMMISSIONING 33
2.7 Microprocessor Controls 14 5.1 Preparation 33
2.8 Motor Current Protection 14 5.2 First Time Start-up 35
2.9 Keypad Controls 14 6 UNIT OPERATION 36
2.10 Accessories and Options 15 6.1 General Description 36
2.11 Nomenclature 17 6.2 Start-up 36
2.12 Functional Description 17 6.3 Normal Running and Cycling 36
3 TRANSPORTATION, HANDLING AND STORAGE 20 6.4 Shutdown 36
3.1 Delivery and Storage 20 7 MAINTENANCE 37
3.2 Inspection 20 7.1 General Requirements 37
3.3 Moving the Unit 20 7.2 Daily Maintenance 37
3.4 Lifting Weights 21 7.3 Scheduled Maintenance 37
7.4 Pressure Vessel In-Service Inspection 38
GB 3
035L02630-100 Rev.5 (0410)
8 TROUBLE SHOOTING 39
8.1 Competent Persons Trouble Shooting Guide 39
8.2 Sensor Calibration Charts 41
9 TECHNICAL DATA 42
9.1 Flow Rate and Pressure Drop Graphs 42
9.2 Operating Limitations 44
9.3 Physical Data 45
9.4 Electrical Data - YLCS SA Models 46
9.5 Electrical Data - YLCS HA & AA Models 50
9.6 Sound Data 53
9.7 Clearances 54
9.8 Dimensions 55
9.9 Weight Distribution and Isolator Positions 61
9.10 Process and Instrumentation Diagram
(Models 0350SA/HA/AA to 0620SA/HA/AA) 63
9.11 Process and Instrumentation Diagram
(Models 0670SA/HA/AA to 1120SA/HA/AA) 64
9.12 Component Layout
(Models 0350SA/HA/AA to 0980SA/HA/AA) 65
9.13 Component Layout (Models 1120SA/HA/AA) 65
10 SPARE PARTS 66
10.1 Recommended Spares 66
10.2 Recommended Compressor Oils 66
10.3 Associated Drawings 67
11 DECOMMISSIONING. DISMANTLING
AND DISPOSAL 68
11.1 General 68
4 GB
035L02630-100 Rev.5 (0410)
1 SUPPLIER INFORMATION
1.1 Introduction For warranty purposes, the following conditions must
be satisfied:
York YLCS chillers are manufactured to the highest
design and construction standards to ensure high The initial start of the unit must be carried out by trained
performance, reliability and adaptability to all types of personnel from an Authorised York Service Centre.
air conditioning installations.
Only genuine York approved spare parts, oils and
The units are intended for cooling water or glycol refrigerants must be used.
solutions and are not suitable for purposes other than
those specified in this manual. All the scheduled maintenance operations detailed in
this manual must be performed at the specified times
This manual and the Microprocessor Based Control by suitably trained and qualified personnel.
System Operating Instructions contain all the information
required for correct installation and commissioning Failure to satisfy any of these conditions will automatically
of the unit, together with operating and maintenance void the warranty.
instructions. The manuals should be read thoroughly
before attempting to operate or service the unit. 1.3 Safety
All procedures detailed in the manuals, including Standards for Safety
installation, commissioning and maintenance tasks
must only be performed by suitably trained and qualified YLCS chillers are designed and built within an EN
personnel. ISO 9001 accredited design and manufacturing
organisation and, within the limits specified in this
The manufacturer will not be liable for any injury or manual, are in conformity with the essential health and
damage caused by incorrect installation, commissioning, safety requirements of the following European Union
operation or maintenance resulting from a failure to Directives:
follow the procedures and instructions detailed in the
manuals. Machinery Directive (2006/42/EC)
1.2 Warranty EMC Directive (2004/108/EC)
Johnson Controls warrants all equipment and materials Safety Code for Mechanical Refrigeration
against defects in workmanship and materials for (EN378-2 (2008))
eighteen months from delivery unless extended warranty
has been agreed as part of the contract. Refrigeration equipment built at Johnson Controls
Nantes conforms to the applicable and essential safety
The warranty is limited to free replacement and shipping requirements of Pressure Equipment Directive 97/23/EC
of any faulty part, or sub-assembly which has failed due and bear CE marking.
to poor quality or manufacturing errors. All claims must
be supported by evidence that the failure has occurred 1.4 Responsibility for Safety
within the warranty period, and that the unit has been
operated within the designed parameters specified. Every care has been taken in the design and manufacture
of the units to ensure that they meet the safety
All warranty claims must specify the unit model, serial requirements listed in the previous paragraph. However,
number and order number. These details are printed on the individual operating or working on any machinery is
the unit identification plate, fitted on the outer edge of primarily responsible for:
the options panel.
Personal safety, safety of other personnel, and the
The unit warranty will be void if any modification to the machinery.
unit is carried out without prior written approval from
Johnson Controls. Correct utilisation of the machinery in accordance with
the procedures detailed in the manuals.
GB 5
035L02630-100 Rev.5 (0410)
1.5 About this Manual Mechanical Strength
The following symbols are used in this document to alert The unit is not designed to withstand loads or stresses
the reader to areas of potential hazard. from adjacent equipment, pipework or structures.
Additional components must not be mounted on the unit.
A Warning is given in this document to Any such extraneous loads may cause structural failure
identify a hazard which could lead to and may result in injury to the operator, or damage to
personal injury. Usually an instruction will the equipment.
WARNING be given, together with a brief explanation
and the possible result of ignoring the General Access
instruction.
There are a number of areas and features which may
A Caution identifies a hazard which could lead be a hazard and potentially cause injury when working
to damage to the machine, damage to other with the unit unless suitable safety precautions are taken.
equipment and/or environmental pollution. It is important to ensure access to the unit is restricted
CAUTION Usually an instruction will be given, together to suitably qualified persons who are familiar with the
with a brief explanation and the possible result potential hazards and precautions necessary for safe
of ignoring the instruction. operation and maintenance of equipment containing
high temperatures, pressures and voltages.
A Note is used to highlight additional information
which may be helpful to you but where there Pressure Systems
are no special safety implications.
NOTE The unit contains refrigerant vapour and liquid under
pressure, release of which can be a danger and cause
injury. The user should ensure that care is taken during
The contents of this manual include suggested best
installation, operation and maintenance to avoid damage
working practices and procedures. These are issued
to the pressure system. No attempt should be made
for guidance only, they do not take precedence over
to gain access to the component parts of the pressure
the above stated individual responsibility and/or local
system other than by suitably trained and qualified
safety regulations.
personnel.
This manual and any other document supplied with the
Electrical
unit, are the property of YORK which reserves all rights.
They may not be reproduced, in whole or in part, without
The unit must be earthed. No installation or maintenance
prior written authorisation from an Authorised YORK
work should be attempted on electrical equipment
representative.
without first switching off, isolating and locking-off the
power supplies. Work on live equipment must only be
1.6 Misuse of Equipment carried-out by suitably trained and qualified personnel.
No attempt should be made to gain access to inside of
Suitability for Application the control panel, wiring or other electrical enclosures
during normal operation of the unit.
The unit is intended for cooling water or glycol solutions
and is not suitable for purposes other than those Refrigerants and Oils
specified in these instructions. Any use of the equipment
other than its intended use, or operation of the equipment Refrigerants and oils used in the unit are generally
contrary to the relevant procedures may result in injury non-toxic, non-flammable and non-corrosive, and pose
to the operator, or damage to the equipment. no special safety hazards. Use of gloves and safety
glasses are, however, recommended when working on
The unit must not be operated outside the design limits the unit. Build up of refrigerant vapour, from a leak for
specified in this manual. example, does pose a risk of asphyxiation in confined or
enclosed spaces and attention should be given to good
Structural Support ventilation. For more comprehensive information on
safety precautions for use of refrigerants and oils, refer
Structural support of the unit must be provided as to the Materials Safety Data tables provided.
indicated in these instructions. Failure to provide proper
support may result in injury to the operator, or damage
to the equipment.
6 GB
035L02630-100 Rev.5 (0410)
High Temperature and Pressure Cleaning 1.8 Safety Labels
High temperature and pressure cleaning methods (e.g. The following labels are fixed to each unit to give
steam cleaning) should not be used on any part of the instruction, or to indicate potential hazards which may
pressure system as this may cause operation of the exist.
pressure relief device(s). Detergents and solvents which
may cause corrosion should also be avoided. White symbol on blue background
For safe operation, read the Instructions
1.7 Emergency Shutdown first
In case of emergency the common input section of the
control panel is fitted with an emergency stop device Black symbol on yellow background
(QCSD/ESD), this can be identified as red in colour and Warning: This machine may start
sited on a yellow back plate. When operated, it removes automatically without prior warning
the 230 Vac supply to the control system. The device can
be locked in the 0 (OFF) position using a padlock.
Black symbol on yellow background
Warning: Hot surface
Black symbol on yellow background
Warning: Safety relief valve may discharge
gas or liquid without prior warning
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
GB 7
035L02630-100 Rev.5 (0410)
1.9 Material Safety Data
Refrigerant Data:
Safety Data R134a
Toxicity Low.
In contact with skin Liquid splashes or spray may cause freeze burns. Unlikely to be hazardous by skin absorption.
Thaw affected areas with water. Remove contaminated clothing carefully — may adhere to skin in
case of freeze burns. Wash affected areas with plenty of warm water. If symptoms occur (irritation
or blistering) obtain medical attention.
In contact with eyes Vapour has no effect. Liquid splashes or spray may cause freeze burns. Immediately irrigate with
eyewash solution or clean water for at least 10 minutes. Obtain immediate medical attention.
Ingested Highly unlikely to occur — but should this occur freeze burn will occur. Do not induce vomiting.
Provided patient is conscious, wash mouth with water and give about 250 ml (0.5 pint) to drink.
Obtain immediate medical attention.
Inhalation High atmospheric concentrations may have an anaesthetic effect, including loss of
consciousness.
Very high exposures may cause an abnormal heart rhythm and prove suddenly fatal.
At higher concentration there is a danger from asphyxiation due to reduced oxygen content of
atmosphere. Remove patient to fresh air, keep warm and at rest. Administer oxygen if necessary.
Apply artificial respiration if breathing has ceased or shows signs of failing. In event of cardiac
arrest apply external cardiac massage. Obtain immediate medical attention.
Further medical advice Symptomatic and supportive therapy is indicated. Cardiac sensitisation has been described
which may, in the presence of circulating catecholamines such as adrenalin, give rise to cardiac
arrhythmia’s and subsequent arrest following exposure to high concentrations.
Long term exposure A lifetime inhalation study in rats has shown that exposure to 50,000 ppm resulted in benign
tumours of the testis. This is not considered to be of relevance to humans exposed to
concentrations at or below the occupational exposure limit.
Occupational Recommended limit: 1000 ppm v/v - 8 hr TWA.
exposure limits
Stability Not specified.
Conditions to avoid Use in presence of naked flames, red hot surfaces and high moisture levels.
Hazardous reactions May react violently with sodium, potassium, barium and other alkali and alkaline earth metals.
Incompatible materials: Magnesium and alloys containing more then 2% magnesium.
Hazardous Halogen acids by thermal decomposition and hydrolysis.
decomposition
products
General precautions Avoid inhalation of high concentrations of vapours. Atmospheric concentrations should be
minimised and kept as low as reasonably practicable below the occupational exposure limit. The
vapour is heavier than air and collects at low level and in confined areas. Ventilate by extraction
at lowest levels.
Respiratory protection Where doubt exists on atmospheric concentration, HSE approved breathing apparatus should be
worn. This should be self contained or of the long breather type.
Storage Keep containers dry and in a cool place away from fire risk, direct sunlight, and all sources of
heat such as radiators. Keep at temperatures not exceeding 45 °C.
Protective clothing Wear overalls, impervious gloves and goggles/face protection.
8 GB
035L02630-100 Rev.5 (0410)
Spill/leak procedure Ensure suitable personal protective clothing and respiratory protection is worn. Provided it is
safe to do so, isolate the source of the leak. Allow small spillage’s to evaporate provided there is
suitable ventilation.
Large spillage’s: Ventilate area. Contain spillage’s with sand, earth or any suitable absorbent
material. Prevent liquid from entering drains, sewers, basements and work pits since vapour may
create a suffocating atmosphere.
Disposal Best to recover and recycle. If this is not possible, destruction is to be in an approved facility
which is equipped to absorb and neutralise acids and other toxic processing products.
Fire extinguishing data Non-flammable at atmospheric conditions.
Containers Fire exposed containers should be kept cool with water sprays. Containers may burst if
overheated.
Fire fighting protective Self contained breathing apparatus and protective clothing must be worn in fire conditions.
equipment
Refrigerant Oil Data
Safety Data York "L" Oil
Classification Non-hazardous
In contact with skin Minimally irritating. No first aid necessary. Exercise reasonable personal cleanliness including
cleansing exposed skin areas several times daily with soap and water. Launder soiled work
clothes at least weekly.
In contact with eyes Flush eyes with eyewash solution or clean water for 15 minutes and consult a physician.
Ingested May cause nausea and diahorrhea. Obtain immediate medical attention.
Inhalation If oil mist is inhaled, remove to fresh air and consult a physician.
Occupational Not determined.
exposure limits
Stability Stable but hygroscopic - store in sealed containers.
Conditions to avoid Strong oxidisers, caustic or acid solutions, excessive heat. May degrade some paints and rubber
materials.
Hazardous Not fully, Analogous compounds evolve carbon monoxide, carbon dioxide and other unidentified
decomposition fragments when burned. Burning may evolve irritating/noxious fumes.
Respiratory protection Use in well ventilated areas - ventilate locally.
Protective clothing Goggles or face shield should be worn. Gloves not necessary, but recommended, especially for
prolonged exposure.
Spill / Leak procedure Wear suitable protective equipment. Especially goggles. Stop source of spill. Use absorbent
materials to soak up fluid (i.e. sand, sawdust and commercially available materials).
Disposal Incinerate the oil and all associated wastes in an approved facility in accordance with local laws
and regulations governing oily wastes.
Fire extinguishing data Flash point over 300°C. Use dry chemical, carbon dioxide or foam. Spraying water on hot or
burning liquid may cause frothing or splashing.
If a leak or spill has not ignited use water spray to disperse the vapours and to provided
protection for persons attempting to stop the leak.
Containers Fire exposed containers should be kept cool with water sprays.
Fire fighting protective Self contained breathing apparatus should be worn in fire conditions.
equipment
GB 9
035L02630-100 Rev.5 (0410)
Thermal & Acoustic Materials Data
Health Hazard & First Aid Toxicity Index <10 to NES713 Issue 3 (1991): Non-hazardous, non-toxic. No first aid
necessary.
Stability / Reactivity Stable.
Handling / Use / Disposal No special handling precautions required. Dispose of according to local laws and
regulations governing non-biodegradable non-hazardous solid wastes.
Fire & Explosion Flammability rating Class 1 to BS 476 pt 7: Non-flammable. If forced to burn,
combustion products are typically over 95% carbon dioxide and carbon monoxide.
10 GB
035L02630-100 Rev.5 (0410)
5
5 6
6 4
3
4 7
7
3
1
1
2
2
1 1 Compressor 5 Common Input Section 1
2 Condenser 6 Power Section - System 2
3 Cooler 7 Control section
4 Power Section - System 1
2 PRODUCT DESCRIPTION
2.1 Introduction 2.2 Compressor
York YLCS chillers are designed for water or water- Twin helical semi-hermetic screw compressors, are
glycol cooling. Models are available in three versions: provided to ensure high operational efficiencies and
standard units (SA), units for applications requiring high reliable performance. A microprocessor controlled output
condensing temperatures (HA) and units for applications pressure regulating capacity control valve commands
where remote condensers are necessary (AA). compressor capacity independent of control valve input
pressure and balances the compressor capacity with the
All models are designed for indoor installation. The cooling load. The compressor is a positive displacement
units are completely assembled with all interconnecting type characterised by two helically grooved rotors which
refrigerant piping and internal wiring, ready for field are manufactured from forged steel. The 50 Hz motor
installation. operates at 2950 rpm to direct drive the male rotor which
in turn drives the female rotor on a light film of oil.
The unit consists of 2 screw compressors with integral
oil separators in separate refrigerant circuits, each with a Each compressor is direct drive, semi-hermetic, rotary
single circuit water cooled condenser (SA & HA models), twin screw type with integral oil separator and includes
and a dual circuit shell and tube DX evaporator. the following items:
Before delivery, the SA & HA unit is pressure tested, Two screw rotors, with asymmetric profiles, manufactured
evacuated, and fully charged with refrigerant and oil from forged steel.
in each of the independent refrigerant circuits. After
assembly, an operational test is performed with water A cast iron compressor housing precision machined to
flowing through the cooler to ensure that each refrigerant provide optimal clearance for the rotors.
circuit operates correctly. For AA units, the unit shall
be pressure tested, evacuated, and filled with 0.35 bar An integral discharge check valve to prevent rotor
g pressure of nitrogen per independant circuit. After backspin during shutdown.
assembly, a simulated functional test is performed on
the unit. Discharge shut-off service valves.
The unit framework is fabricated using heavy-gauge A reliable suction gas cooled high efficiency, accessible
galvanised steel which is zinc phosphate pre-treated hermetic motor with overload protection using both
and powder coated to minimise corrosion. thermistor and over current protection.
GB 11
035L02630-100 Rev.5 (0410)
EVACUATION AND DISCHARGE
OIL FILL POINT GAS OUT
LIFTING LUGS
MOTOR TERMINALS
OIL SIGHT GLASS
SUCTION
GAS IN
A suction gas screen and serviceable, 17 micron full flow The compressor is lubricated by removing oil from
oil filter within the compressor housing. the discharged refrigerant gas within the integral oil
separator. For HA & AA units liquid injection is provided
Refrigerant gas is injected into the void created by the into discharge rotor for discharge gas and oil cooling. The
unmeshing of the five lobed male and seven lobed compressor design working pressure is 28kg/cm².
female rotor. Further meshing of the rotors closes the
rotor threads to the suction port and progressively A 300 watt (230 V 1 Ø 50 Hz) immersion heater is located
compresses the gas in an axial direction to the discharge in the compressor. The heater is temperature activated
port. The gas is compressed in volume and increased to prevent refrigerant condensation.
in pressure before exiting at a designed volume at the
discharge end of the rotor casing. Since the intake and Motor Starting
discharge cycles overlap, a resulting smooth flow of gas
is maintained. Two types of compressor motor starting are available:
star/delta open transition starter and optional star/delta
The rotors are housed in a cast iron compressor housing closed transition starter.
precision machined to provide optimal clearances for
the rotors. Contact between the male and female rotor The standard star/delta starter utilises 3 motor contactors
is primarily rolling on a contact band on each of the and a transition delay relay. The optional closed Star/
rotor’s pitch circle. This results in virtually no rotor wear Delta starter utilises 4 motor contactors, a set of transition
and increased reliability. resistors and a transition delay relay. The star/delta start
allows inrush current to be limited to approximately
The compressor incorporates a complete anti-friction 33% LRA with the closed transition option reducing the
bearing design for reduced power input and increased transient star to delta current.
reliability. Separated, cylindrical, roller bearings handle
radial loads. Angular-contact ball bearings handle axial When the microprocessor initiates a start signal to run
loads. Together they maintain accurate rotor positioning a compressor, it runs in Star for 4 seconds and then
at all pressure ratios, thereby minimising leakage and transitions to Delta.
maintaining efficiency. A spring loaded check valve
is installed on the compressor discharge housing to Capacity Control
prevent compressor rotor backspin due to system
refrigerant pressure gradients during shutdown. The loading control range is approximately 30% to 100%
per compressor via control steps. The micro controller
Motor cooling is provided by suction gas from the will adjust compressor loading to balance the cooling
evaporator flowing across the motor. load. This will take account of the discharge pressure
12 GB
035L02630-100 Rev.5 (0410)
and motor current should either approach their limiting Models 0335 to 0750 have vertical water nozzles
value. (standard) with victualic couplings (shipped loose) for
field installation by contractor. Horizontal water nozzles
The automatic spring return of the capacity control valve with victaulic couplings (shipped loose) are available
to the minimum load position will ensure compressor as an option.
starting at minimum motor load.
Models 0860 and 1120 have horizontal water nozzles
2.3 Refrigerant Circuits with victaulic grooves (victaulic couplings to be supplied
by others).
Each refrigerant circuit uses copper refrigerant pipe
formed on computer controlled bending machines to Optional ISO EN1092-1 type 01.A welded flanges
reduce the number of brazed joints resulting in a reliable and companion flanges, complete with nuts, bolts and
and leak resistant system. gaskets are available on all models.
Liquid line components include: a manual shut-off valve 2.6 Power and Control Panels
with charging port, a high absorption removable core
filter-drier, a solenoid valve, a sight glass with moisture All controls and motor starting equipment are factory
indicator, and a thermostatic expansion valve. wired and function tested. The panel enclosures are
designed to IP42 and are manufactured from powder
Suction lines are covered with closed-cell insulation. painted galvanised steel. Component mounting panels
are of non-painted galvanised steel to ensure effective
2.4 Condenser (SA and HA Models) earthing protection.
The two single refrigerant circuit water-cooled condensers The panel is divided into power sections for each
are cleanable shell and tube type with seamless external electrical system, a control section and a common
finned 19mmODcopper tubes rolled into tube sheets. input section. Power entry is from the top of the control
The design working pressures are 10 bar g on the panel common input section. Each section has separate
waterside and 30 bar g on the refrigerant side which is hinged, latched, and gasket sealed doors.
protected by pressure relief valve(s).
Each power section contains:
The condenser has removable steel water heads. The
water connections have standard female threads (refer Compressor fuses, compressor contactors, phase
to Section 9 - dimension drawings for details). Optional rotation relay, compressor motor current transformer
extension or manifold kits are available with victualic and a control circuit fuse.
couplings or flanges.
The control section contains:
For AA units water cooled condensers are factory
removed. Remote air-cooled condenser supplied by On/Off switch, microcomputer keypad and display,
others (field installed). microprocessor board (AMB), power supply board (APB)
and relay board (ARB).
2.5 Cooler The common input section contains:
The 2 pass dual circuit shell and tube type direct An incoming non-fused disconnect switch for connection
expansion (DX) evaporator has chilled liquid circulating of the customer provided single power supply. Internal
back and forth across the tubes from one end to the factory wiring to two fused protected power sections. The
other. The waterside (shell) design working pressure control supply is derived internally. (Refer to «Electrical
of the cooler is 10 bar g. The refrigerant side (tubes) Connection Options» for details).
design working pressure is 20 bar g on models 0350 to
0670 and 1120 and 24 bar g on models 0750 to 0980. The common input section also contains the control
The refrigerant side is protected by pressure relief circuit switch disconnect/emergency stop device, a
valve(s). transformer (to provide the necessary 24 Vac supply for
the power supply board), control fuses, residual current
The evaporator shall have water pass baffles fabricated circuit breaker, and terminals for a remote emergency
from non metalic composite materials (0335 to 0750) stop device.
and corrosion resistant galvanised steel (0860 to 1120).
Removable heads are provided for access to internally
enhanced, seamless, copper tubes. Water vent and
drain connections are included. The cooler is insulated
with flexible closed-cell foam.
GB 13
035L02630-100 Rev.5 (0410)
2.7 Microprocessor Controls motor shuts down. Since the microprocessor is sending
a run signal to the contactor, it senses the low motor
The microprocessor has the following functions and current below 15% FLA and shuts the system down.
displays:
Motor Protector Module
A liquid crystal 40 character display with text provided
on two lines and light emitting diode backlighting for The motor protector module provides thermal overload
outdoor viewing. protection.
A colour coded, 35 button, sealed keypad with sections Three thermistors in the motor windings of each phase
for Display, Entry, Setpoints, Clock, Print, Program and provide thermal protection. If the motor temperature rise
the unit Auto/Off switch. above 110°C the motor protector module contact will
open. The contact will re-close at 75°C.
The standard functions include: water or glycol cooling,
automatic pump down after shutdown, run signal contact, Phase Rotation relay (KPR)
demand load limiting from external building automation
system input, remote reset liquid temperature reset Each power section is fitted with a phase rotating relay
input, unit alarm contacts, chilled liquid pump control, to monitors the 3 phase voltage. Provided the phase
automatic or manual reset after power failure, automatic rotation is correct the relay will close its contact in the
system optimisation to match operating conditions. compressor contactor circuit.
The software is stored in non-volatile memory (EPROM) 2.9 Keypad Controls
to eliminate unit failure due to AC power failure. The
programmed setpoint is stored in a lithium battery For a detailed description of the keypad controls refer
backed memory. to the Microprocessor Based Control System Operating
Instructions.
2.8 Motor Current Protection
Status Key
The microprocessor motor protection provides high
current protection to assure that the motor is not This key provides a display of the current operational
damaged due to voltage, excess refrigerant, or other and/or fault status of the unit or the individual refrigerant
problems that could cause excessive motor current. systems. The display will show the ‘highest priority"
information as determined by the microprocessor.
If the motor current exceeds the 115% FLA trip point
after 9 seconds of operation, or is above 105% for 30 The main categories of messages are: General Status
seconds, the microprocessor will shut the system down Messages; Unit Warnings; Anticipation Control Status
and lock it out after three faults occur in 90 minutes. A Messages; Chiller Fault Status Messages; System Fault
manual reset of the respective system switch is required Status Messages.
to clear the fault and restart the system after a lockout.
A thorough check of the motor, wiring, and refrigerant Display Keys
system should be carried out before restarting a system
that has faulted on high motor current. Each key provides a real-time display of commonly
required information about the chiller and individual
The microprocessor also provides low motor current refrigerant system operating conditions and settings. This
protection when it senses a motor current less than 15% is particularly useful during commissioning, monitoring
FLA. Low motor current protection is activated 9 seconds the operation of the chiller, diagnosing potential future
after start. The microprocessor will shut the system down problems and service troubleshooting. Parameters may
whenever low motor current is sensed and will lock out be displayed in Imperial (°F and PSIG) or Metric (°C
a system if three faults occur in 90 minutes. Once a and Bar) units.
system is locked out on Low Motor Current, it must be
manually reset with the system switch. Print Keys
The microprocessor also senses low motor current These keys allow control panel display or remote printout
whenever a High Pressure Cut-out (HPCO) or Motor of both current real-time operating and programmed data
Protector (MP) or Phase Rotation Relay (KPR) contact as well as fault history data from the most recent three
opens. The MP, HPCO and KPR contacts are connected safety shutdowns.
in series with the motor contactor. Whenever any of these
devices are open, the contactor de-energises and the Printouts are via the RS232 port and a separate
printer.
14 GB
035L02630-100 Rev.5 (0410)
Entry Keys Multi-Point - System Circuit Breakers
The numeric and associated keys are used for entering Two door interlocked circuit breakers, mounted in
data required for programming the chiller. The ‘ENTER" the power sections, for connection of the customer
key is also used for scrolling through information provided power supplies. A non-fused disconnect switch
available after pressing other keys. / emergency stop device (QCSD/ESD) in the common
input section with termination for the customer (400 V,
Setpoints Keys 2 Ø, 50 Hz ) control supply.
These keys are used for display and programming of Building Automation System (BAS) / EMS Interface
the local and remote offset chilled liquid temperature
setpoints. Provides a means to reset the leaving chilled liquid
temperature and from the BAS / EMS (Factory
Clock Keys Mounted):
These keys are used for display and programming of the Printed circuit board to accept 4 to 20 mA, 0 to 10 Vdc,
clock and operating schedule for the chiller. or dry contact closure input from the BAS / EMS.
Temperature Offset A YORK ISN Building Automation System
can provide a Pulse Width Modulated (PWM)
Pulse width modulating (PWM) input is provided to signal direct to the standard control panel via
remotely adjust the leaving chilled water temperature NOTE the standard on-board RS485 port.
setpoint to a higher value.
E-Link Gateway
Program Key
Interface to enable communication with building control
This key is used for display and programming of the systems using BACnet, MODBUS, LON or N2 protocols.
chiller operational settings and limits. See separate York documentation.
2.10 Accessories and Options Anti-Vibration Mounts
Power Supply Connection Optional 25mm deflection, open spring, anti-vibration
mounts with levelling screw. Supplied loose for field
Units are available with either single point or multi point installation.
power supply connections:
Optional floor mounting kit with 25 mm neoprene pads.
Single Point - System Fused Disconnect Switches Supplied loose for field installation.
A non-fused disconnect switch in the common input Power Factor Correction:
section of the panel for connection of the customer
provided single power supply. Internal factory wiring to Factory mounted passive (static) correction capacitors to
two door interlocked fused disconnect switches mounted correct unit compressor power factors to 0.95 (depending
in the power sections. The control supply is derived on operating conditions).
internally from the terminal block.
Flow Switch
Single Point - System Circuit Breakers
(Not available on the YLCS0955, 1050, 110 HA & AA) Switch with 1 inch BSP thread suitable for 10 barg DWP
and having gold contacts for low voltage/current, to
A terminal block in the common input section of the panel protect unit from loss of water flow. Supplied loose for
for connection of the customer provided single power field installation,
supply. Internal factory wiring to two door interlocked
or
circuit breakers, mounted in the power sections. The
control supply is derived internally from the terminal Factory fitted pressure differential switch on cooler.
block.
Suction Shut-off Valves
A ball valve in the low pressure (suction) pipework per
refrigerant circuit for isolation.
GB 15
035L02630-100 Rev.5 (0410)
Evaporator Kits Double Thickness Insulation
Models 0350 to 0750, horizontal water nozzles with The cooler is covered with 38 mm (1 ½ inch) flexible, UV-
victaulic couplings (shipped loose), vertical nozzle cooler stable colour co-ordinated closed-cell, foam insulation
with EN1092-1 Type 01.A welded/companion flange kit, to prevent sweating in humid environment.
or horizontal nozzle cooler with EN1092-1 Type 01.A
welded/companion flange kit. Models 0860 to 1120, ISO Condenser extension / Manifold kits
EN1092-1 Type 01.A welded/companion flange kit for
standard horizontal nozzle cooler (Note: vertical nozzle Condenser extension kit simplifies connections to
coolers are not available). customer pipework. Both options come with either
Victaulic coupling or welded Flange/companion flange
Low temperature Evaporator Kits kit.
Low temperature evaporator configurations are identical IP54
to the standard or options detailed above.
Panel enclosure designed to IP54.
Pressure Relief Valves Options
Language LCD and Keypad
• Pressure Relief (CE/PED) Serviceable Valve & Dual
Kit. Standard display language and keypad is English.
High & Low side vessels’ dual relief valves fitted with French, German, Italian, Spanish, Portugese and
3 way changeover valves and compressors’ single Hungarian are available as options.
relief valves fitted with ball valves, to assist valve
replacement during maintenance without loss of Sequence Controller:
refrigerant charge.
Monitors mixed leaving chilled water or glycol temperature
• Pressure Relief (CE/PED) Serviceable Valve & Dual
from two to four units and controls to maintain required
Kit & Burst.
mixed temperature whilst running the minimum number
High & Low side vessels’ dual relief valves fitted with
of units.
bursting disks and 3 way changeover valves and
compressors’ single relief valves fitted with bursting
Printer
disks and ball valves, to assist valve replacement during
maintenance without loss of refrigerant charge.
Hand held printer for obtaining printout of unit operating
data and history data.
Dual Pressure Switch
Paint Overspray
Dual HP pressure cut-outs on both circuits.
Complete unit finish in Carribean Blue.
Heat Pump Sensor Kit:
Lifting Lug Kit
Capability of controlling condenser water off for heat
pump applications.
One set of ISO Mk5 cam locks to enable safe and easy
unit handling.
Closed Transition Star/Delta
Factory Witness Test:
With the addition of closed transition contactors and
resistors, the change over spike during starting can be
To perform a customer functional witness test of cooling
reduced to nearer the star inrush level thus reducing the
capacity only, test is carried out in factory test area.
risk of electrical interference during compressor start.
Mechanical Gauge Kit
Factory fitted mechanical gauges for display of suction
and discharge pressures, one complete set per
system.
16 GB
035L02630-100 Rev.5 (0410)
2.11 Nomenclature
YLCS0350SA50YAA
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
BASE PRODUCT TYPE MODEL NUMBER UNIT DESIGNATOR REFRIGERANT VOLTAGE / STARTER DESIGN / DEVELOPMENT LEVEL
Y : York # # # # kW S : Standard Unit A : R-134a 5 0 : 380-415 / 3 / 50 A : Design Series A
L : Liquid H : High Condensing Y : Star Delta A : Engineering Change
C : Chiller :0350 :0415 :0480 :0530 :0575 Temperature or PIN Level
S : Screw :0620 :0660 :0725 :0840 :0955 A : Remote
:1050 :1110 Condensor
2.12 Functional Description
YLCS Models 0350 to 0620
Evaporator
PRV (2)
EVAPORATOR
TEV
SV T
LLV S
Condenser PRV (2)
Not fitted to
YLCS AA models
CONDENSER
Discharge
PRV (1) (2)
Compressor
PRV (2)
PT
SV s
NOTES:
COMPRESSOR
1 - See Discharge Pressure Relief Valve Table
Liquid Injection
2 - See Pressure Relief Valve Options Table
Option
Start Bypass Option
GB 17
035L02630-100 Rev.5 (0410)
YLCS Models 0670 to 1120
Evaporator
PRV (2)
EVAPORATOR
TEV
ECOПоказано початок документа. Повний текст — у PDF за посиланням вище.
Документ виробника, опублікований як довідковий матеріал на обладнання, яке ми постачаємо. Правовласник може попросити прибрати його — приберемо.