York YPC, Engineering Manual

Page 1: ...FORM 155 19 EG3 1011 Model YPC Two Stage Steam Fired Absorption Chiller Style D Models YPC ST 14SC through YPC ST 19S 300 through 675 Tons 1050 through 2372 kW ...

Page 2: ...M 155 19 EG3 1011 1 Introduction 3 How It Works 4 Ratings 5 MicroComputer Control Center 6 Mechanical Specifications 8 Optional Features 11 Application Data 12 Dimensions 17 Nozzle Arrangement 14SC 18 Nozzle Arrangement 16SL and Larger 19 Guide Specifications 20 ...

Page 3: ...ximately 1 19 With today s energy and environmental considerations the YORK YPC Two Stage Steam Absorption Chiller is the ideal choice for a wide range of applications YPC Steam Chillers come equipped with the same sophisticated microprocessor controls found throughout Johnson Controls line of large tonnage chillers making the YPC Steam Chiller the smart est and most efficient absorber on the mark...

Page 4: ...ates the possibility of crystallization solidification by allowing the unit to operate at much lower solution concentration and temperatures than series flow systems 2 First stage Generator An outside steam source heats dilute LiBr 58 3 coming from the Solution Pump Heat Exchangers This produces hot refrigerant vapor which is sent to the Second Stage Generator leaving a concentrated solution 63 8 ...

Page 5: ...rough a metering valve and flows down to the Refrigerant Pump where it is pumped up the the top of the Evaporator Here the liquid is sprayed out as a fine mist over the Evapora tor tubes Due to the extreme vacuum 6 mm Hg in the Evaporator some of the refrigerant liquid evaporator creating the refrigerant effect This vacuum is created by hygroscopic action the strong affinity LiBr has for water in ...

Page 6: ...down and the operational parameters just prior to shutdown For a complete history printout of the last four shut downs and operational parameters just prior to shut down CAPACITY CONTROL When automatic capacity control is desired the Micro Computer Control Center automatically varies the steam flow rate to maintain the programmed leaving chilled water set point for cooling loads ranging from 20 to...

Page 7: ...ety Shutdown systems discussed in this section Also included is an operator interface concentration calculator When in the PROGRAM mode an operator can use the concentration calculator to determine concentration by inputting set of conditions The operator must input any two of three parameters bromide solution temperature saturation temperature and pressure and the micropanel will display the conc...

Page 8: ...ell closer to the generator contains the intermediate pressure section of the machine consist ing of the condenser and second stage generator The second stage generator is a drip type heat exchanger with 5 8 16 mm 0 025 0 6 mm wall copper tubing for the 14SC and 3 4 19 mm OD 0 028 0 7 mm wall for the 16SL and larger Generator and condenser are separated by baffling which prevents liquid carryover ...

Page 9: ... use of a eductor Noncondensibles are then stored in a purge chamber until they can be removed through the use of a purge pump The purge pump is an oil rotary two stage vacuum pump with a 1 4 HP 3 Phase ODP motor The chiller control panel includes a SmartPurge system that will automatically sense the amount of non conden sibles in the purge chamber and empty the tank whenever necessary The SmartPu...

Page 10: ... Security access code is provided for operator to pro gram setpoints or to choose local remote or service modes of operation Manual control of the steam valve position and all pumps is provided through separate buttons in the service mode of operation Data Logging All operating and setpoint information can be transmitted to a remote printer by others through the RS232 port in the control center to...

Page 11: ... and includes the following Water flow rates and temperatures Steam consumption rate System operating temperatures and pressures Absorber solution concentrations All liquid levels in the sightglasses Exact solution and refrigerant charge amount SPARE PUMPS A complete set of replacement solution and refrigerant pumps ships alongside the unit for local spare parts inventory REMOTE RESET CONTROLS Two...

Page 12: ...imen tation or organic growth These will hurt chiller perform ance and increase operating and maintenance costs Normally performance may be maintained by corrective water treat ment and periodic cleaning of tubes If water conditions exist which cannot be corrected by proper water treatment it may be necessary to provide a larger allowance for foul ing and or specify special material of constructio...

Page 13: ...nstalled in the tower water piping in the same manner as the chilled water flow switch above The YPC chiller is engineered for maximum effi ciency at both design and part load operation by taking advantage of the colder cooling tower water tempera tures which naturally occur in the winter months In its standard con figuration YPC absorbers can toler ate entering tower water temperatures as low as ...

Page 14: ...he Johnson Controls supplied steam control valve must be no further than 200 inches 5 m from the first stage generator steam inlet flange in order to minimize the pressure drop from the valve exit to the generator inlet Dimension H1 is specified to prevent condensate back flow from the generator into the steam piping Dimen sion H2 is specified to prevent excessive backpressure to the drain cooler ...

Page 15: ...rain cooler at approximately 15 PSIG 1 bar 180 F 82 2 C 4 Maximum inlet steam pressure 128 PSIG 8 83 bar 5 Automatic shutoff valve to be failsafe type 6 Both the steam supply and condensate drain pipes must be prop erly sized and pitched to prevent hammering 7 Steam control valve to be installed within 200 inches 5 m of the first stage generator steam inlet flange spray header pump and one refrige...

Page 16: ...0V 125A 250V 36 8 12 12 1 7 5 67 5 15 5 28 230 3PH 60Hz 75 8 100A 240V 100A 250V 36 8 12 12 1 5 4 3 66 6 15 5 50 380V 3PH 50Hz 41 3 60A 480V 60A 600V 19 7 7 0 9 2 6 36 5 16 2 46 460V 3PH 60Hz 38 60A 480V 50A 600V 18 4 6 6 0 8 2 2 33 4 15 5 19S 17 200 208V 3PH 60Hz 94 7 200A 240V 125A 250V 36 8 30 12 1 7 5 85 5 20 1 28 230 3PH 60Hz 93 8 100A 240V 125A 250V 36 8 30 12 1 5 4 3 84 6 20 1 50 380V 3PH 5...

Page 17: ...ION AREAS LBS NO CHARGE LBS SHIPPED W CHARGE INLET PIPE IN OUTLET PIPE IN 14SC 201 74 88 20900 22500 24300 2 5 3 4 16SL 235 89 103 30200 34150 37800 4 0 3 4 172 398 17S 235 89 103 31000 34950 38600 4 0 3 4 172 398 18S 274 90 109 36900 41600 45800 4 0 3 4 205 474 19S 314 90 109 44500 49600 54900 4 0 3 4 237 506 UNIT TYPE LENGTH1 mm A WIDTH mm B HEIGHT mm C RIGGING WEIGHT OPERATING WEIGHT kg STEAM2 ...

Page 18: ... Victualic couplings Factory installed class 150 ANSI B16 5 round slip on forged carbon steel with 1 16 raised face water flanged nozzles are optional Companion flanges nuts bolts and gaskets are not furnished 3 Connected piping should allow for removal of compact water box for tube access and cleaning 4 Tower water must enter the absorber first for proper performance EVAPORATOR NOZZLE ARRANGEMENT...

Page 19: ...langes or the use of ANSI AWWA C 606 couplings Factory installed class 150 ANSI B16 5 round slip on forged carbon steel with 1 16 inch raised face water flanged nozzles are optional Companion flanges nuts bolts and gaskets are not furnished 3 Connected piping should allow for removal of compact water box for tube access and cleaning 4 Tower water must enter the absorber first for proper performanc...

Page 20: ... tubing for the 14SC and 3 4 19 05mm OD 0 028 0 71mm wall for the 16SL and larger with enhanced surface as required to meet given capacity WATER BOXES Water boxes shall be removable to permit tube cleaning and replacement Water circuit tubing to be replaceable from either end of the chiller heater unit Stubout water connections having ANSI AWWA C 606 grooves shall be provided as standard ANSI flan...

Page 21: ...to be sized by the unit manu facturer in accordance with the specified steam pressure and flow requirements The steam valve shall be a cage type valve incorporat ing a carbon steel body and a teflon seat Valve link age actua tor motor assembly shall be capable of modu lating steam flow in a linear fashion from 20 to 100 of maximum design chiller steam input Valve shall be equipped with 150 lb ANSI...

Page 22: ...automatic restart is displayed manual restart is implied all system operating information dis played just prior to shutdown Warning Conditions MicroComputer Control Center Panel shall close warning contacts and generate a unique warning message whenever one of the following operating conditions is detected Low refrigerant temperature High generator temperature or pressure High or low entering cond...

Page 23: ...f all operating setpoint and shutdown informa tion to a remote printer printer supplied by others This transmission can occur as needed or automatically on predetermined intervals 0 1 to 25 5 hrs In the case of a safety or cycling shutdown the RS 232 port shall transmit all operating data detected prior to the shut down as well as the time and cause of the shutdown to a remote printer printer supp...

Page 24: ... Form 155 19 EG3 1011 Supersedes 155 19 EG3 311 ...