Инструкция на Центробежные чиллеры (тепловые насосы) с водяным охлаждением конденсатора York серии YK. Руководство по эксплуатации. бренда York

YK - ALL MODELS

INSTALLATION, COMMISSIONING, OPERATION AND MAINTENANCE REVISION 2 035-19569-101 (0109) CENTRIFUGAL LIQUID CHILLER STYLE G R134A

Table of Contents

1 SUPPLIER INFORMATION 1-1 4 INSTALLATION 4-1 1.1 Introduction 1-1 4.1 Location 4-1 1.2 Warranty 1-1 4.2 Motors 4-1 1.3 Safety 1-1 4.3 Foundation 4-1 1.4 Responsibility for Safety 1-1 4.4 Clearances 4-1 1.5 About this Manual 1-2 4.5 Rigging Unit to Final Location 4-1 1.6 Misuse of Equipment 1-2 4.6…

6 OPERATION

9 TECHNICAL DATA 9-1 6.1 Oil Heater Operation 6-1 9.1 Dimensions 9-1 6.2 Checking the Oil Level in the Oil Reservoir 6-1 9.2 6.3 Start-up Procedure 6-1 Dimensions Evaporator Compact Water Boxes 9-4 6.4 Chiller Operation 6-4 Nozzle Arrangements Evaporator Compact Water Boxes 9-5 6.5 Operating Log…

SUPPLIER INFORMATION 1.1 Introduction For warranty purposes, the following conditions must be satisfied: York YK chillers are manufactured to the highest design and construction standards to ensure high performance, reliability and adaptability to all types of air conditioning installations. The…

1.5 About this Manual

The following symbols are used in this document to alert the reader to areas of potential hazard. WARNING CAUTION A Warning is given in this document to identify a hazard which could lead to personal injury. Usually an instruction will be given, together with a brief explanation and the possible…

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. 1.8 Safety Labels The following labels…

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…

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…

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…

PRODUCT DESCRIPTION Figure 2.1 YK Centrifugal Liquid Chiller (Front View) 2.1 General (Figures 2.1 and 2.2) The York YK Millennium™ Centrifugal Liquid Chiller is primarily used for large air conditioning systems, but may be used on other applications. The chiller is completely factory-packaged…

2.2 Capacity Control (Figure 2.2)

The major components of a chiller are selected for full load capacities, therefore capacity must be controlled to maintain a constant chilled liquid temperature leaving the evaporator. Prerotation vanes (PRV), located at the entrance to the compressor impeller, compensate for variation in load (See…

Figure 2.3 YK Centrifugal Liquid Chiller (Rear View)

2.3 Compressor The compressor is a single-stage centrifugal type powered by an open-drive electric motor. The rotor assembly consists of a heat-treated alloy steel drive shaft and impeller shaft with a cast aluminum, fully shrouded impeller. The impeller is designed for balanced thrust and is…

Figure 2.4 Compressor Lubrication System

2-4 GB

To provide the required amount of oil under the necessary

pressure to properly lubricate these parts, a motor driven submersible oil pump is located in a remote oil sump. Upon pressing of the COMPRESSOR START switch on the control panel, the oil pump is immediately energized. After a 50 second pre-lube period, the compressor motor will start. The oil pump…

Stub-out water nozzle connections with Victaulic grooves

are welded to the water boxes. These nozzle connections are suitable for Victaulic couplings, welding or flanges, and are capped for shipment. Plugged ¾" drain and vent connections are provided in each water box. 2.8 Refrigerant Flow Control Refrigerant flow to the evaporator is controlled by a…

2.10 Nomenclature

YK ER ER Q7 Model GB 5 CS G S Special Modifications Evaporator Code Design Level Condenser Code Motor Code Compressor Code Power Supply (5 for 50 Hz) 2-7

2.11 Range of Models

TRANSPORTATION, RIGGING AND STORAGE 3.1 General YK units are shipped as a single factory assembled, piped, wired package, requiring minimum installation to make chilled water connections, condenser water connections, refrigerant atmospheric relief connections, and electrical power connections.…

Units shipped dismantled MUST be reassembled by, or under the supervision of, a

York representative. (See Form 160.73-N3) NOTE Form 7 – Split Shells Shipped as four major assemblies. Unit first factory assembled, refrigerant piped, wired and leak tested; then dismantled for shipment. Compressor/motor assembly removed from shells and skidded. 3.3 Inspection, Damage and Shortage…

3.4 Rigging

The complete standard chiller is shipped without skids. (When optional skids are used it may be necessary to remove the skids so riggers skates can be used under the unit end sheets to reduce overall height.) Each unit has four (4) lifting holes (two in each end) in the end sheets which should be…

GB

4.5 Rigging Unit to Final Location INSTALLATION 4.1 Location YK units are furnished with vibration isolator mounts for basement or ground level installations. Units may be located on upper floor levels providing the floor is capable of supporting the total unit operating weight and optional spring…

4.7 Installing Optional Spring Isolators

4.8 Piping Connections When ordered, 4 spring type isolator assemblies will be furnished with the unit. The 4 assemblies are identical and can be placed at any of the 4 corners of the unit. After the unit is levelled (and wedged in place for optional spring isolators) the piping connections may be…

LD08525

UNIT WEIGHT UP TO 7423 Kgs. UNIT WEIGHT 7424 TO 13,080 Kgs. LD08527 UNIT WEIGHT 13,081 TO 24,281 Kgs. LD08528 UNIT WEIGHT 24,281 TO 45,570 Kgs. Condenser Centreline Centreline of Vessels See Dimensions Evaporator Centreline See Dimensions Figure 4.1 Neoprene Isolators GB 4-3

4-Spring Isolators, Unit Weights less than 15880 kg

6-Spring Isolators, Unit Weights 15881 kg to 26467 kg 9-Spring Isolators, Unit Weights greater than 26468 kg Figure 4.2 Spring Isolators 4-4 GB

4.9.1 Chilled Water Circuit

4.9.2 Condenser Water Circuit Foreign objects which could lodge in, or block flow through the evaporator and condenser tubes must be kept out of the water circuit. All water piping must be cleaned or flushed before being connected to the chiller pumps, or other equipment. For proper operation of the…

4.10 Stop Valves

Stop valves may be provided (by others) in the evaporator and condenser water piping adjacent to the unit to facilitate maintenance. Thermometer wells and pressure taps should be provided (by others) in the piping as close to the unit as possible to facilitate operating check. 4.11 Flow Switches…

4.15 Unit Piping

4.17 Control Wiring Compressor lubricant piping and system external piping are factory installed on all units shipped assembled. On units shipped dismantled, the lubricant piping to oil sump and oil cooler and system oil return connections should be completed, under the supervision of the York…

YK Motors (Electro-Mechanical Starter)

4.20 Thermal Insulation (See Product Drawings Form 160.52-PA1) Figure 4.6 shows the power wiring hook-up for Motor Connections. (Refer to Wiring Labels in Motor Terminal Box for hook-up to suit motor voltage and amperage.) Motor leads are furnished with a crimp type connection having a clearance…

COMMISSIONING The customers disconnection devices can now be set to ON. 5.1 Preparation Commissioning of this unit should only be carried out by York authorised personnel. The machine is now live! WARNING CAUTION The Graphic Control Centre manual must be read in conjunction with this section.…

5.2 First Time Start-up

During the commissioning period there should be sufficient heat load to run the unit under stable full load operation to enable the unit controls, and system operation to be set up correctly and a commissioning log taken. Read the following section in conjunction with the Graphic Control Centre…

OPERATION If the oil heater is de-energised during a shutdown period, it must be energized for 12 hours prior to starting the compressor. CAUTION 6.2 Checking the Oil Level in the Oil Reservoir Correct oil level - During operation, the oil level should fall to the "Operating Range" identified on the…

Figure 6.1 Control Centre

6.3.2 Start-up 1. If the chilled water pump is manually operated, start the pump. The control centre will not allow the chiller to start unless chilled liquid flow is established through the unit. (A field supplied chilled water flow switch is required.) If the chilled liquid pump is wired to the…

** Not for all shutdowns. Refer to Graphic Control Centre Operating Instructions

Figure 6.2 Chiller Starting Sequence and Shutdown Sequence (Electro-mechanical and Solid State Starter Models) Not for all shutdowns. Refer to Graphic Control Centre Operating Instructions. Figure 6.2 GB Chiller Starting Sequence and Shutdown Sequence (Variable Speed Drive Models) 6-3

6.4 Chiller Operation

6.5 Operating Log Sheet After the compressor reaches operating speed, the prerotation vanes will begin to open under the control of the microprocessor which senses the leaving chilled liquid temperature. The unit capacity will vary to maintain the leaving CHILLED LIQUID TEMPERATURE SETPOINT. The…

Safety Shutdowns If the chiller shuts down on a SAFETY shutdown, the chiller will restart when the shutdown condition is removed. These shutdowns require the operator to manually reset the graphic control centre (OptiView) prior to restarting the chiller. Common Shutdowns Solid State Starter…

Cycling Shutdowns If the chiller shuts down on a CYCLING shutdown, the chiller will automatically restart when the cycling condition is removed. These shutdowns do not require the operator to manually reset the control centre prior to restarting the chiller. Common Shutdowns • • • • • • • • • • • •…

6.7 Stopping the System

6.8 Prolonged Shutdown The graphic control centre (OptiView) can be programmed to start and stop automatically (maximum, once each day) whenever desired. To stop the chiller, proceed as follows: If the chiller is to be shut down for an extended period of time (for example, over the winter season)…

GB

MAINTENANCE The units have been designed to operate continuously provided they are regularly maintained and operated within the limitations given in this manual. Each unit should be included in a routine schedule of daily maintenance checks by the operator/customer, backed up by regular service…

COMPRESSOR

SOLENOID VALVE CONDENSER EVAPORATOR CHECK VALVE OIL EDUCTOR BLOCK SOLENOID VALVE DEHYDRATOR STOP VALVE STOP VALVE Figure 7.1 Oil Return System 7.1.6 Annually (more often if necessary) 1. Drain and replace the oil in the compressor oil sump (See Oil Charging Procedure). 2. Evaporator and Condenser…

Figure 7.2 Oil Reservoir Charging

7.3 Oil Charge The nominal oil charge for the compressor is 75.7 litres, of York “K” oil. Only York “K” refrigeration oil must be used in the centrifugal compressor. Since oil absorbs moisture when exposed to the atmosphere, it should be kept tightly capped until used. 7.3.1 4. As soon as oil…

Figure 7.3 Unit Evacuation

7.4.2 Leak Testing After the system has been charged, the system should be carefully leak tested with a R134a compatible leak detector to ensure all joints are tight. Otherwise, it is recommended to perform a leak test quarterly. If any leaks are indicated, they must be repaired immediately.…

NOTE Refrigerant Charging When opening any part of the refrigerant system for repairs, the refrigerant charge must be removed. If the chiller is equipped with optional valves, the refrigerant can be isolated in either the condenser or evaporator / compressor while making repairs. To prevent liquid…

Condenser

Acid Cleaning of Tubes Condenser trouble due to fouled tubes is usually indicated by a steady rise in head pressure, over a period of time, accompanied by a steady rise in condensing temperature, and noisy operation. These symptoms may also be due to foul gas build-up. Purging will remove the foul…

4. After the tubes have been corked for 12 to 24 hours,

it is recommended that two men working at both ends of the evaporator carefully test each tube – one man removing corks at one end and the other at the opposite end to remove corks and handle the leak detector. Start with the top row of tubes in the section being investigated. Remove the corks at…

7.8 Electrical Controls

7.9 Testing Motor Winding Insulation 1. All electrical controls should be inspected for obvious malfunctions. With the main disconnect switch and compressor motor starter open, test the motor as follows: 2. It is important that the factory settings of controls (operation and safety) are not changed.…

TROUBLSHOOTING Fault Possible Cause Remedy 1. SYMPTOM: Abnormally High Discharge Pressure Temperature difference between condensing temperature and condenser leaving liquid temperature higher than normal. Air in condenser. Bleed cooling water circuit. High discharge pressure. Condenser tubes dirty…

Fault

Possible Cause Remedy 5. SYMPTOM: Unusually High Oil Pressure develops when Oil Pump Runs Unusually high oil pressure is displayed when the oil pressure display key is pressed when the oil pump is running. High oil pressure. Transducer defective. Replace low or high oil pressure transducer. 6.…

H Compressors

178 ADDITIONALOPERATING HEIGHT CLEARANCE TYPE OF CHILLER MOUNTING M 44 NEOPRENE PAD ISOLATORS 25 SPRING ISOLATORS 25MMDEFLECTION 19 DIRECT MOUNT H9 COMPRESSORS EVAP.-COND.SHELL CODES A K-K 2299 M-M 2616 B 3150 3315 C 641 724 D 508 584 E 4267 4267 NOTES: 1. All dimensions are approximate. Certified…

K Compressors

9.2 Dimensions - Evaporator Compact Water Boxes

9.3 Nozzle Arrangements - Evaporator Compact Water Boxes

Evaporators - Compact Water Boxes - M to Z Evaporators

9.4 Dimensions - Condenser Compact Water Boxes

9.5 Nozzle Arrangements - Condenser Compact Water Boxes

FRONT OF UNIT 1-PASS NOZZLE ARRANGEMENTS Q P CC COND. M FLOOR LINE D MOTOR END IN P Q 1 COND. D COMPRESSOR END COND. NO. OF PASSES CC OUT Q P M FRONT OF UNIT 2-PASS S U R T NOZZLE ARRANGEMENTS DD BB BB COND. FLOOR LINE D IN R T 2 COND. D M COND. NO. OF PASSES DD OUT S U M MOTOR END COMPRESSOR END…

9.6 Dimensions - Evaporator Marine Water Boxes

9.8 Nozzle Arrangements - Evaporator Marine Water Boxes

EVAPORATOR 1-PASS IN OUT F EVAPORATOR 2-PASS IN OUT EVAPORATOR 3-PASS IN OUT EVAP SHELL CODE A C,D E,F G,H J,K,L M,N P,Q QT,QV R,S,W X,Z 1-PASS F I F 2-PASS G 3-PASS I F I NOTES: 1. All dimensions are approximate. Certified dimensions are available upon request. 2. Standard water nozzles are…

9.8 Dimensions - Condenser Marine Water Boxes

9.8 Nozzle Arrangements - Condenser Marine Water Boxes

? CONDENSER 1-PASS IN OUT TUBE SHEET TUBE SHEET J H (2-PASS RETURN HEAD) CONDENSER 2-PASS IN OUT CONDSHELL CODE CONDENSER 3-PASS IN OUT A C,D E,F J,K,L M,N P,Q R,S T,V,W X,Z 1-PASS H K H 2-PASS J 3-PASS K H K NOTES: 1. All dimensions are approximate. Certified dimensions are available upon request.…

9.9 Unit Weights

GB

+32 °C WATER VALVES Service valves for refrigerant charging / removing TE 093 TE 094 PSV 032 YORK LT 030 PT 030 PSH 030 TE 031 ZT 040 TE 032 3-4 1 PW 030 SG 030 S32 PRV ZSL 010 010 SG 041 PT 041 TE 040 SG MPH 040 7 OH TSH OY 040 LCV TCV 030 TE 010 SG 010 5 PT 010 S31 PW 010 PSV 011 S10 PSV 012 YORK…

GB

SPARE PARTS When ordering spare parts, we will require the following information to ensure the correct parts are supplied: Full unit model number, serial number, application and details of the parts required. All requests for parts should be made to your local York Sales and Service Centre. GB 10-1

GB

DE-COMMISSIONING, DISMANTLING AND DISPOSAL Never release refrigerant to the atmosphere when emptying the refrigerating circuits. Suitable retrieval equipment must be used. If reclaimed refrigerant cannot be re-used. It must be returned to the manufacturer. Packaged units can generally be removed in…

GB

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Инструкция на Центробежные чиллеры (тепловые насосы) с водяным охлаждением конденсатора York серии YK. Руководство по эксплуатации.

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