Carrier 17 Start Up & Operation Manual

Contents

Set Up Machine Control ConfigurationDo not operate the machine before the control configu-rations have been checked and a Control Test has beensatisfactorily completed. Protection by safety controlscannot be assumed until all control configurations havebeen confirmed.As configuration of the 17/19EX unit is performed, writedown all configuration settings. A log, such as the one shownon pages CL-1 to CL-12, provides a convenient list for con-figuration values.Input the Design Set Points — Access the LID setpoint screen and view/modify the base demand limit set point,and either the LCW set point or the ECW set point. The PICcan control a set point to either the leaving or entering chilledwater. This control method is set in the Equipment Configu-ration table, Config table.Input the Local Occupied Schedule (OCCPC01S)— Access the schedule OCCPC01S screen on the LID andset up the occupied time schedule per the customer’s re-quirements. If no schedule is available, the default is factoryset for 24 hours occupied 7 days per week includingholidays.For more information about how to set up a time sched-ule, see the Controls section, page 12.The CCN Occupied Schedule (OCCPC03S) should be con-figured if a CCN system is being installed or if a secondarytime schedule is needed.The Ice Build Occupied Schedule (OCCPC02S) shouldbe configured for Ice Build applications.Input Service Configurations — The following con-figurations require the LID screen to be in the Service por-tion of the menu.• password• input time and date• LID configuration• controller identification• service parameters• equipment configuration• automated control testPASSWORD — When accessing the Service tables, a pass-word must be entered. All LIDs are initially set for a pass-word of 1-1-1-1. This password may be changed in the LIDconfiguration screen, if desired.INPUT TIME AND DATE — Access the Time and Datetable on the Service menu. Input the present time of day,date, and day of the week. ‘‘Holiday Today’’ should only beconfigured to ‘‘Yes’’ if the present day is a holiday.CHANGE LID CONFIGURATION IF NECESSARY — TheLID Configuration screen is used to view or modify the LIDCCN address, change to English or SI units, and to changethe password. If there is more than one machine at the job-site, change the LID address on each machine so that eachmachine has its own address. Note and record the new ad-dress. Change the screen to SI units as required, and changethe password if desired. A copy of the password should beretained for future reference.MODIFY CONTROLLER IDENTIFICATION IF NECES-SARY — The controller identification screen is used to changethe PSIO module address. Change this address for each ma-chine if there is more than one machine at the job-site. Write the new address on the PSIO module for futurereference.INPUT EQUIPMENT SERVICE PARAMETERS IF NEC-ESSARY — The Equipment Service table has 3 service tables:Service1, Service2, and Service3.Configure SERVICE1 Table — Access Service1 table tomodify/view the following to jobsite parameters:Chilled Medium Water or Brine?Brine Refrigerant Trippoint Usually 3° F (1.7° C) below designrefrigerant temperatureSurge Limiting orHot Gas Bypass OptionIs HGBP installed?Minimum Load Points(T1/P1) Per job data — See Modify LoadPoints sectionMaximum Load Points(T2/P2)Per job data — See Modify LoadPoints sectionMotor Rated Load Amps Per job dataMotor Rated Line Voltage Per job dataMotor Rated Line kW Per job data (if kW meter installed)Line Frequency 50 or 60 HzCompressor Starter Type Reduced voltage or full?Stop-to-Start Time* Follow motor vendor recommenda-tion for time between starts. Seecertified prints for correct value.*Open-drive machines only.NOTE: Other values are left at the default values. These may be changedby the operator as required. Service2 and Service3 tables can be modi-fied by the owner/operator as required.Modify Minimum and Maximum Load Points (DT1/P1;D T2/P2) If Necessary —These pairs of machine load points,located on the Service1 table, determine when to limit guidevane travel or to open the hot gas bypass valve when surgeprevention is needed. These points should be set based onindividual machine operating conditions.If, after configuring a value for these points, surge pre-vention is operating too soon or too late for conditions, theseparameters should be changed by the operator.Example of configuration: Machine operating parametersRefrigerant used: HFC-134aEstimated Minimum Load Conditions:44 F (6.7 C) LCW45.5 F (7.5 C) EWC43 F (6.1 C) Suction Temperature70 F (21.1 C) Condensing TemperatureEstimated Maximum Load Conditions:44 F (6.7 C) LCW54 F (12.2 C) ECW42 F (5.6 C) Suction Temperature98 F (36.7 C) Condensing TemperatureCalculate Maximum Load — To calculate maximum loadpoints, use design load condition data. If the machine fullload cooler temperature difference is more than 15° F(8.3° C), estimate the refrigerant suction and condensing tem-peratures at this difference. Use the proper saturated pres-sure and temperature for the particular refrigerant used.Suction Temperature:42 F (5.6 C) = 37 psig (255 kPa) saturatedrefrigerant pressure (HFC-134a)Condensing Temperature:98 F (36.7 C) = 120 psig (1827 kPa) saturatedrefrigerant pressure (HFC-134a)Maximum Load DT2:54 – 44 = 10° F (12.2 – 6.7 = 5.5° C)Maximum Load DP2:120 – 37 = 83 psid (827 – 255 = 572 kPad)55