Carrier 19XRV Start-up, Operation And Maintenance Instructions Manual

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Table 7 -- Capacity Overrides TableFIRST STAGE SET POINT SECOND STAGE SET POINT OVERRIDE TERMINATIONOVERRIDECONDITION View/Modify on Override Default Configurable Value ValueICVC Screen Value RangeCONDENSER CONDENSER PRESSURE CONDENSER PRESSUREHigh Condenser Pressure SETUP1 PRESSURE 90 to 165 psig > COND PRESS OVERRIDE < CONDENSER PRESS(COND PRESS OVERRIDE) >125 psig (862 kPa) (621 to 1138 kPa) + 2.4 psig (16.5 kPA) OVERRIDE - 1 PSI (6.9 kPa)High Motor Temperature COMP MOTOR 150 to 200 F COMP MOTOR WINDING TEMP COMPR MOTOR WINDING(COMP MOTOR TEMP SETUP1 WINDING TEMP > COMP MOTOR TEMP OVER- TEMP < COMP MOTOR TEMPOVERRIDE) > 2OO F (93 C) (66 to 93 C) RIDE + 10 F (5.6 C) OVERRIDE- 2 F (1.1 C)EVAPORATOR REFRIG TEMPEVAPORATOR < EVAP REF OVERRIDE TEMPLow Evaporator Temperature REFRIG TEMP 2 to 5 F - 1 F (.6 C) EVAP REFRIG TEMP(REFRIG OVERRIDE SETUP1 < EVAP REFRIG (1.1 to 2.8 C) NOTE: EVAP REF OVERRIDE > EVAP REF OVERRIDE TEMPDELTA T) TRIPPOINT + 3 F TEMP = EVAP REFRIG TRIP- +2F(1.1C)(1.7 C) POINT + REFRIG OVERRIDEDELTA TMin TI: 1.5 F (0.8 C) 0.5 - 2.0 F(0.3- 1.1 C)Min PI: 50 psid 30 - 170 psid ACTIVE DELTA T > SURGE/High Compressor Lift OPTIONS (345 kPa) (207 - 1172 kPad) None HGBP DELTA T + SURGE/HGBP(SURGE/HGBP DELTA T,P) Max T2:10 F (5.6 C) 0.5 - 20 F DEADBAND(0.3- 11,1 C)Max P2:85 psid 50 - 170 psid(586 kPad) (345 - 1172 kPad)Manual Guide Vane Target Press RELEASE softkey after(TARGET GUIDE VANE POS) COMPRESS Automatic 0 to 100% None selecting TARGET GUIDE VANEPOSForced TARGET VFD SPEEDManual Speed Control VFD MINIMUM cannot override either a Press RELEASE softkey aftercapacity inhibit or a capacity selecting TARGET VFD SPEED(TARGET VFD SPEED) COMPRESS Automatic SPEED to 100% decrease command generated bythe PIC IIIMotor Load MAINSTAT Automatic 40 to 100% ACTIVE DEMAND LIMIT ACTIVE DEMAND LIMIT(ACTIVE DEMAND LIMIT) > Set Point + 5% < Set Point - 2%ACTUAL SUPER- ACTUAL SUPERHEAT ACTUAL SUPERHEATHEAT< SUPERHEAT None < SUPERHEAT REQUIRED > SUPERHEAT REQUIREDLow Discharge Superheat OVERRIDE REQUIRED forconditions - 1.25 F (0,7 C) + 1 F (0.56 C)High Rectifier Temperature RECTIFIER 155 to 170 F RECTIFIER TEMP RECTIFIER TEMP(RECTIFIER TEMP SETUP1 TEMPERATURE> (66 to 77 C) > RECTIFIER TEMP OVERRIDE < RECTIFIER TEMP OVERRIDEOVERRIDE) 160 F (71 C) + 10 F (5,6 C) - 5 F (2.8 C)High Inverter Temperature INVERTER 155 to 170 F INVERTER TEMP INVERTER TEMP(INVERTER TEMP SETUP1 TEMPERATURE > > INVERTER TEMP OVERRIDE < INVERTER TEMP OVERRIDEOVERRIDE) 160 F(71 C) (66 to 77 C) + 10 F(5,6C) -5 F(2.8C)Remote Start/Stop Controls -- A remote device, suchas a timeclock that uses a set of contacts, may be used to stmtand stop the chillel: Howevel; the device should not be pro-gmmmed to st_ut and stop file chiller in excess of 2 or 3 timesevery 12 hours. If more than 8 st_uts in 12 hom_ (the STARTSIN 12 HOURS parmneter on the MAINSTAT screen) occur.(not counting either lecycle restmts or auto restarts after powerfailure) an excessive starts alarm displays, preventing thechiller from starting. Tile operator must press thesoftkey on the ICVC to override the starts counter and start thechillel: If the chiller records 12 starts (excluding recycle starts)in a sliding 12-hour period, it can be lestarted only by pressingthe _ softkey followed by the _ or _ soft-key. This ensures that, if the automatic system is m_dfunction-ing, the chiller will not repeatedly cycle on and off. If theAUTORESTART OPTION in the OPTIONS scieen and theREMOTE CONTACTS OPTION are enabled, the REMOTECONTRACTS must be closed in order for the chiller to lest_utfollowing a power failure. If the automatic restmt after a powerfailure option (AUTO RESTART OPTION on file OPTIONSscreen) is not activated when a power failure occurs, and if theremote contact is closed, the chiller will indicate an _darmbecause of the loss of voltage.The contacts for remote start are wired into terminals 23 trod24 of the low voltage terminal strip in the VFD enclosure. Seethe certified drawings for further details on contact ratings. Thecontacts must have 24 vac dry contact rating.Spare Safety and Spare Temperature Inputs --Norln_dly closed (NC) discrete inputs for addition_d field-supplied safeties may be wired to the spare protective limitsinput channel in place of the factory-installed jumper onterminals 19 and 20 of the low voltage terminal strip. Theopening of tiny contact will result in a safety shutdown and adisplay on the ICVC. Refer to the certified drawings for safetycontact ratings.Extra amdog telnperature sensors may also be added to theCCM module (SPARE TEMPERATURE #l and SPARETEMPERATURE #2) at terminals J4 25-26 and J4 27-28,respectively. The analog temperature sensors may be config-ured in the EQUIPMENT SERVICE/SETUPI table to causean alert (Enable value l or 2) or almm (Enable value 3 or 4),or neither (Enable value 0). An alarm will shut down a runningchiller, but an alert will not. The fault condition will betriggered when crossing a high limit (Enable value 2 or 4) orlow limit (Enable value l or 3), configurable between -40 F to245 F (-40 C to 118 C). The spare temperature sensors arereadable on the CCN netwoN. They also have specific usesas common temperature sensors in a Lead/Lag system (seepage 44).Alarm (Trip) Output Contacts -- One set of alarmcontacts is provided in file stmlel: The contact ratings areprovided in the certified drawings. The contacts are located onterminals 9 and l0 of the TB2 field wiring terminal strip in theVFD enclosure.4O