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AIR-COOLED SCREW LIQUID CHILLERS
New Release
Form 201.19-NM1 (204)
INSTALLATION, OPERATION & MAIN TE NANCE
035-20319-000
YCAS AIR-COOLED LIQUID CHILLERS
YCAS0130 THROUGH YCAS0230
STYLE G
028971-G
60 Hz
YCAS 2 SYSTEM EPROM 031-01798-001 (STANDARD, BRINE & METRIC MODELS COM BINED)
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FORM 201.19-NM1 (204) CHANGEABILITY OF THIS DOCUMENT In complying with YORK’s policy for continuous prod uct improvement, the information contained in this doc u ment is subject to change without notice. Literature updates that may occur will be printed on the Revision Sheet and included with the Installation, Operation & Maintenance (IOM) man, which is provided with new equipment. If not found with the manual, the current Revision Sheet containing any applicable revisions, and the manual, c
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FORM 201.19-NM1 (204) IMPORTANT! READ BEFORE PROCEEDING! GENERAL SAFETY GUIDELINES This equipment is a relatively complicated ap pa ra tus. which it is sit u at ed, as well as severe personal injury or Dur ing installation, operation, maintenance or service, death to them selves and people at the site. in di vid u als may be exposed to certain com po nents or conditions in clud ing, but not limited to: re frig er ants, This document is intended for use by owner-authorized oils, materials un d
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FORM 201.19-NM1 (204) TABLE OF CONTENTS SECTION 1 - GENERAL CHILLER Single-Point Power Connection with Individual INFORMATION & SAFETY Circuit Protection .................................................23 INTRODUCTION ...........................................................9 Single-Point Power Connection with Combined WARRANTY...................................................................9 Circuit Protection ................................................23 SAF
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FORM 201.19-NM1 (204) TABLE OF CONTENTS (CONT’D) Units with Single-Point Power Supply Wiring ....34 Suction Superheat.................................................44 115VAC CONTROL SUPPLY TRANSFORMER ........34 Expansion Valve ..................................................44 Remote Emergency Stop Device..........................35 Economizer Superheat .........................................44 CONTROL PANEL WIRING........................................35 Subcooling......................
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FORM 201.19-NM1 (204) TABLE OF CONTENTS (CONT’D) SECTION 8 - MICRO PANEL CONTENTS 3.6 Operating Hrs / Start Counter key................146 3.7 Options key & .............................................146 CHILLERLER CONTROL PANEL 3.8 Funtion Key..................................................148 PROGRAMMING AND DATA ACCESS KEYS ....... 122 DISPLAY AND STATUS INFORMATION KEYS ....122 4. PRINT KEYS...........................................................149 ON / OFF ROCKER SWITCH............
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FORM 201.19-NM1 (204) TABLE OF CONTENTS (CONT’D) SECTION 11 - TROUBLE SHOOTING SECTION 9 - MAINTENANCE TROUBLESHOOTING GUIDE .................................200 GENERAL REQUIREMENTS ...................................194 LIMITED WARRANTY YORK AMERICAS CONDENSER COILS.................................................194 ENGINEERED SYSTEMS .........................................202 WARRANTY ON NEW EQUIPMENT ......................202 Chiller / Compressor Operating Log..................195 WARRAN
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FORM 201.19-NM1 (204) LIST OF FIGURES FIG. 1 – COMPONENT LOCATIONS .........................12 FIG. 23 – MODEL YCAS0130 - 0180 FIG. 2 – SCREW COMPRESSOR................................13 DIMENSIONS (ENGLISH) .........................82 FIG. 3 – UNIT RIGGING..............................................28 FIG. 25 – MODEL YCAS0200 - YCAS0230 FIG. 4 – LIFTING LUGS ..............................................28 DIMENSIONS (ENGLISH) .........................86 FIG.
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FORM 201.19-NM1 (204) GENERAL CHILLER INFORMATION & SAFETY 1 INTRODUCTION For warranty purposes, the following conditions must YORK YCAS chillers are manufactured to the high est be satisfi ed: design and construction standards to en sure high • The initial start of the unit should be carried out performance, reliability and adaptability to all types of by trained personnel from an Authorized YORK air conditioning installations. Ser vice Cen ter. See Commissioning, page 42. The unit is in
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General Chiller Information & Safety FORM 201.19-NM1 (204) RESPONSIBILITY FOR SAFETY MISUSE OF EQUIPMENT Every care has been taken in the design and man u fac ture Suitability for Application of the unit to ensure compliance with the safety require- The unit is intended for cooling water or glycol so lu tions ments listed above. However, the individual op er at ing and is not suitable for purposes other than those spec i fi ed or working on any machinery is primarily re spon si ble in these ins
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FORM 201.19-NM1 (204) per son nel. No attempt should be made to gain access to am ple, does pose a risk of asphyxiation in confi ned or the con trol panel or electrical enclosures during nor mal enclosed spac es and attention should be given to good op er a tion of the unit. ven ti la tion. 1 High Temperature and Pressure Cleaning Rotating Parts High temperature and pressure cleaning methods (e.g. Fan guards must be fi tted at all times and not removed steam cleaning) should not be used on an
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Product Description FORM 201.19-NM1 (204) PRODUCT DESCRIPTION 1 System Fans 2 System 1 Power Panel 1 3 System 2 Power Panel 4 Control Panel 2 4 5 Power Entry 3 6 System 1 Compressor 7 Evaporator 8 System 2 Compressor 9 System 1 Condenser 10 Option Box 9 10 8 7 5 6 FIG. 1 – COMPONENT LOCATIONS 028971-G INTRODUCTION All exposed power wiring is be routed through liquid- tight, non-metallic conduit. YORK YCAS chillers are designed for water or wa- ter -glycol co
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FORM 201.19-NM1 (204) Refrigerant gas is drawn into the void created by the The compressor is lubricated by removing oil from unmeshing of the fi ve lobed male and seven lobed the refrigerant using an external oil separator. The fe male rotor. Further meshing of the rotors closes pres sur ized oil from the oil separator is then cooled in the ro tor threads to the suction port and progressively the condenser coils and piped back to the compressor for com press es the gas in an axial direction
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Product Description FORM 201.19-NM1 (204) stag gered rows and mechanically expanded into cor ro sion assure re frig er ant compression (volumetric ef fi cien cy). resistant aluminum alloy fi ns with full height fi n col lars. The oil also provides cooling by transferring much of They have a design working pressure of 450 PSIG the heat of com pres sion from the gas to the oil keeping (31 bar). Each coil is rested to 495 PSIG (34 bar). dis charge tem per a tures down and reducing the chance for
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FORM 201.19-NM1 (204) Each power compartment contains: Motor Current Protection Compressor and fan starting contactors, fan motor The microprocessor motor protection provides high ex ter nal overloads, control circuit serving compressor cur rent protection to assure that the motor is not ca pac i ty control, compressor and fan contactor coils and damaged due to voltage, excess refrigerant, or other compressor motor overloads. (Fig #1, page 12) problems that could cause excessive motor curr
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Product Description FORM 201.19-NM1 (204) Motor Protection Modules (2ACE) will be open pre vent ing the motor contactors from The mechanical motor protector is a Texas In stru ments en er giz ing. Power must be removed and re applied to 2ACE Three Phase Protection Module (Fig. 45, page re set the mod ule. Use CB3 in the Micro Panel to cycle 127), provides thermal and cur rent motor overload pro- power. tec tion. This mod ule also pro tects against phase to phase cur rent im bal ance, over
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FORM 201.19-NM1 (204) Thermal Overload Current.” A current imbalance exceeding an unloaded Three PTC (positive temperature co ef fi cient) ther mistors level of 25% will result in the motor pilot circuit being in the motor windings provides thermal pro tec tion. The de-energized. sensor re sis tance stays rel a tive ly con stant at 1kΩ until A loaded compressor condition occurs when any mea- a tem per a ture of 266°F (130°C) is sensed. The sensor sured half line current is great er than or
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Product Description FORM 201.19-NM1 (204) TABLE 1 – MOTOR PROTECTOR DIP SWITCH SETTING YCAS STYLE G, ACROSS-THE-LINE – 60 HZ NO. MO T OR PROTECT OR CHILLER MODEL VOLT LEADS NAMEPLATE MP NO. CODE PER DIP SWITCH SETTINGS ON MP (“1” IN
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FORM 201.19-NM1 (204) TABLE 1 – MOTOR PROTECTOR DIP SWITCH SETTING (CONT’D) YCAS STYLE G, ACROSS-THE-LINE – 60 HZ NO. MO T OR PROTECT OR CHILLER MODEL VOLT LEADS NAMEPLATE MP NO. CODE PER DIP SWITCH SETTINGS ON MP (“1” INDICATES ON
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Product Description FORM 201.19-NM1 (204) TABLE 1 – MOTOR PROTECTOR DIP SWITCH SETTING (CONT’D) YCAS STYLE G, WYE DELTA START – 60 HZ NO. MO T OR PROTECT OR CHILLER MODEL VOLT LEADS NAMEPLATE MP NO. CODE PER DIP SWITCH SETTINGS ON MP
