Carrier 50JB034 Specifications

Controls, Operation,and TroubleshootingCONTENTSPageSAFETY CONSIDERATIONS ...2GENERAL ...2-4Carrier Com

Table 3 — HSIO Keypad and Display Module Functions and SubfunctionsSUBFUNCTIONNO.FUNCTIONSStatusHistory Schedule Service Set Point Test1 CurrentAlarms

Table 4 — Accessing Functions and SubfunctionsOPERATION KEYPAD ENTRY DISPLAY DESCRIPTIONTo access a function, press the subfunction number and the fun

Table 7 — Configuring Units of Measure in DisplayDESCRIPTION HOW TO CONFIGURE SET POINT RANGESelect Units of MeasureUNITSMetric = 1;English (Imperial)

Sequence of Operation (CV, Automatic Fan) — The fan willbe turned OFF during an Occupied period when there is nodemand for heating or cooling operatio

Table 9 — Configuring Fan Operation (CV)DESCRIPTION HOW TO CONFIGURE SET POINT RANGESelect Auto or Continuous Operation(CV only)FANM Auto = 0; Cont = 1

HEATING — The Staged Heating Control routine deter-mines the staging of the available heating system to main-tain space comfort conditions. The heatin

To select the Unoccupied Heating set point, scroll downto UHSP. The current set point value will be displayed. Thedefault is 55 F. The range of accept

Table 14 — Sensor Set Point Alert Limits and Default ValuesNAME DESCRIPTIONSUBFUNCTIONOCCUPIEDSPACE STATUSALERTDEFAULT(LOW)ALERTDEFAULT(HIGH)LOWLIMITH

Schedules Group — This group includes Schedule Iand II, Timed Discrete Output, Timed Override, AdaptiveOptimal Start, and Adaptive Optimal Stop (avail

OPTIMAL START — The control will compute a time pe-riod (in minutes) to start Occupied Mode Warm-up prior tostart of the Occupied Mode schedule, to ar

CONTENTS (cont)PageSTART-UP ...44-56Initial Check ...44Set Fan Status and Check Filter Switc

Economizer and Power Exhaust Group — Thisgroup includes Economizer,Nighttime Free Cooling, and Modu-lating Power Exhaust.ECONOMIZER — Economizer contr

Table 19 — Configuring EconomizerDESCRIPTION HOW TO CONFIGURE AT HSIO SET POINT RANGEConfigure EconomizerECON Air = 1; None = 0*Specify Minimum Damper P

NIGHTTIME FREE COOLING (NTFC) — Nighttime FreeCooling will start the supply fan on cool nights to pre-coolthe structure mass by using only outside air

Table 22 — Power ExhaustFan Operation DefinitionsITEM DEFINITIONBP Actual Space PressureBPSO Building Pressure Set Point OffsetBPSP Building Pressure S

Smoke Control Group — This group includes Pres-surization, Evacuation, Smoke Purge, and Fire Shutdown.PRESSURIZATION — Pressurization mode is used to

Special Ventilation Group — This group includes In-door Air Quality (IAQ), IAQ (Pre-Occupancy) Purge, Out-door Air CFM Control (OAC), and IAQ/OAC Rehe

e. Configure High Reference. Scroll down to IRH. De-fault is 2000 ppm. Range is 0 to 5000 ppm.IAQ AlgorithmsIQMP = ECON + 100 x IAQG x (Demand)/IAQSWhe

Table 28 — Outdoor Air Control DefinitionsITEM DEFINITIONECON Economizer PositionOAC Outdoor Air ControlOCS OAC Cfm Set PointOCMX OAC Minimum Damper Po

Dehumidification and Humidifier Group — Thisgroup includes Dehumidification and Reheat, and Humidi-fier Controls.DEHUMIDIFICATION AND REHEAT — Dehumidifica

Sequence of Operation (Discrete-Output Device)1. If the supply fan is off, then the humidifier will be off.2. If the Occupancy Schedule indicates Unocc

NETWORK OPTIONSREMOTECCN SITEAUTODIALGATEWAYNON CARRIER HVAC EQUIPMENTFIDTERMINAL SYSTEMMANAGERASI TCUROOFTOP UNIT DAV AIRTERMINALTCUTCU

Space Temperature (SPT) is compared to Occupied Cool-ing set point (OCSP). If the SPT is below OCSP, the resetvalue is calculated. If the reset value

Sequence of Operation1. If the supply fan is OFF, or if Unoccupied Free Coolingis active, the heating value is modulated to maintain de-sired minimum

Table 37 — Head Pressure Control DefinitionsITEM DEFINITIONSHPSP Head Pressure Set PointMMAS MotormasterT Function ConfigurationSCT Saturated Condensing

Configuration — To configure:1. Enable Demand Limit. Press to enter the sub-function. Scroll down to DLEN. Press toENTERenable.2. Select Loadshed Groups

INSTALLATION INFORMATIONControl Wiring— See Fig. 14 - 29 for connections tounit. The recommended types of control wiring for unit de-vices are listed

Remote Reset — The unit controls allow for remote in-put from an energy management system (EMS) or some otherinput to offset the space temperature set

SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4REDBLKREDBLKREDBLKREDBLKTO PROCESSORMODULE NO. 1REDBLK2TB2SIZES054-074SIZES034-0481TB331SPACE TEMPERATURE AVERAGING

Fig. 17 — Differential Enthalpy SensorLEGENDDSIO — Relay ModuleFig. 18 — Remote RUN/UNOCCUPIED Control19J7PSIO NO. 222252814TB2SIZES034-0485TB2SIZES05

TO 24-VISOLATEDTRANSFORMERBRNREDCFM ACYOUTDOOR AIR24V24V+-PNKBLKPSIONO. 2CH. 35LEGENDTB — Terminal BlockField WiringComponent TerminalTerminal Bl

+_BLKWHTRED+_BLKWHTRED+_BLKWHTRED+_BLKWHTREDDPT1DPT2SPT1SPT2BLKBLKBLKBLKBLKREDREDBRNBRNWHTWHTRESRESBLKREDWHTWHTWHTWHTRESRES781011131410K OHM 1/2 WATT

bus with 2 or more PIC- or FID-controlled pieces of equip-ment is referred to as a Carrier Comfort Network (CCN) sys-tem. The CCN communications bus c

Timed Discrete Output — A timed discrete output isavailable for switching on and off items such as parking lotlights. Time Schedule II ( SCHD to SCHD)

Fig. 31 — Auxiliary Control Box Location; Size 054-074 UnitsFig. 32 — Auxiliary Control Box Details; Size 034-048 UnitsLEGENDBP — Building PressureDP

CARRIER COMFORT NETWORK INTERFACEThe units can be connected to the CCN if desired. Thecommunication bus wiring is supplied and installed in thefield. I

3. Remove the 4-pin female plug from the fuse and controlcircuit breaker bracket in the main control box, and con-nect the wires as follows:a. Insert

START-UPInitial CheckIMPORTANT: Do not attempt to start unit, even mo-mentarily, until all items on the Controls Start-Up Check-list (in installation

Table 42 — Filter Switch Set PointFILTER TYPEINCREASEDPRESSURE DROPTO ‘‘DIRTY’’FROM PIVOT POINTAPPROXIMATECLOCKWISETURNS2-in. Throwaway 0.30 in. wg 22

Adjusting Set PointsSET POINT FUNCTION — The Set Point function allowsthe user to view the current values set for the unit. From thisfunction, the use

Table 43 — Set Point DirectorySET POINTSubfunction Keypad Entry Display Comment1 SET POINTSSET POINT System set pointsOHSP X Occupied heat set point X

Table 44A — Set Point Ranges and Defaults (English Units)DISPLAYSET POINTDESCRIPTIONDEFAULTVALUEALLOWABLERANGEBPSP Building pressure set point 0.05 in

Table 45 — Operating ModesMODENO.OPERATINGMODETO CONFIGURE OPTION TO ENABLE MODEPress Display Press* Display21 Space Temperature ResetSPCRESET RSEN EN

HIGH-VOLTAGE RELAYMODULES (DSIO1 and DSIO2)— The DSIO modules close contacts to energize evaporatorand condenser fan contactors. The modules also cont

Table 46 — Setting Daylight Savings TimeKEYBOARD ENTRY DISPLAY COMMENTSDAYLIGHTDaylight savings time field configuration of setpoint functionENM X Month

7. Scroll through the rest of the days (press ) toto be sure that no other days have been flagged.Suppose, for this example, Tuesday was flagged for thi

Table 47 — Schedule DirectorySCHEDULESubfunction Keypad Entry Display Comments1 OVERRIDEOVRD xHR Number of Override Hours (0 to 4 Hours);Schedule I2 P

ECONOMIZER — The economizer control loop will be de-layed 2 minutes after the supply fan is turned ON, to allowsystem and temperatures to stabilize be

ADAPTIVE OPTIMAL STOP (CV Applications Only) —Optimal stop is used to allow space temperature to drift toan expanded occupied set point during the las

Table 48 — Head Pressure/Fan Cycling ControlCONTROL LOGICUNIT CONFIGURATION STAGE OFM ON OFM OFFSTANDARD (with standard SCT sensors)(MMAS = Yes)(TRNS

Table 49 — Fan Sequence of OperationUNIT SIZES FAN ARRANGEMENT STAGE CIRCUITFAN RELAYOUTPUTRELAYCONTROLLEDFAN(S)CONTROLLED034-0381 Com MM MMC OFM12 Co

UNIT OPERATIONUnit Operation information can be accessed through theHSIO keypad and display (field-installed accessory). See theKeypad and Display Modu

Table 50 — Status DirectorySTATUSSubfunction Keypad Entry Display Expansion (Press key)1ALARMSALARMS CURRENT ALARMSALARM 51 COMPRESSOR A1 FAULTALARM 5

Table 50 — Status Directory (cont)STATUS (cont)Subfunction Keypad Entry Display Expansion (Press key)2 ALERTS ALERTS CURRENT ALERTSALERT 150 SUPPLY AI

Table 1 — Thermistors and Unit Operation Control Pressure TransducersSENSOR LOCATION AND FUNCTION PART NO.Unit Operation Control Pressure TransducersD

Table 50 — Status Directory (cont)STATUS (cont)Subfunction Keypad Entry Display Expansion (Press key)4 STAGES STAGES CURRENT STAGESCOOL X COOLING STAG

Table 50 — Status Directory (cont)STATUS (cont)Subfunction Keypad Entry Display Expansion (Press key)8 INPUTS INPUTS SYSTEM INPUTSCSA1 X COMPRESSOR A1

Table 50 — Status Directory (cont)STATUS (cont)Subfunction Keypad Entry Display Expansion (Press key)10OUTPUTSOUTPUTS DISCRETE OUTPUTSSF X SUPPLY FAN

If the display is ENT HGH and the user wants toENTERuse outdoor air, pressing will change the display toENT LOW/FORCE 4; overriding or ‘‘forcing’’ the

Table 51 — Compressor Loading and Unloading Sequences (60 Hz Units) (cont)COOLINGSTAGESIZE 048 UNITSLead Circuit Lag CircuitActiveCylsPercentCapacityC

Table 52 — Compressor Loading and Unloading Sequences (50 Hz Units)COOLINGSTAGESIZE 034 UNITSLead Circuit Lag CircuitActiveCylsPercentCapacityComp 1Un

TROUBLESHOOTINGBy using the accessory keypad and display module andthe status function, actual operating conditions of the unitare displayed while it

Single Circuit Stoppage — If a single circuit stops,there are several potential causes:1. Open contacts in the compressor high-pressure switch.2. Low

Table 54 — Alarm CodesDISPLAY DESCRIPTIONACTION TAKEN BYCONTROLRESETMETHODPROBABLE CAUSE51 Compressor A1 Failure Compressor A1 shut down ManualHigh-pr

Table 54 — Alarm Codes (cont)DISPLAY DESCRIPTIONACTION TAKEN BYCONTROLRESETMETHODPROBABLE CAUSE77 High Pressure, Circuit BCircuitB compressor(s)shutdo

LEGENDNEMA — National Electrical Manufacturers’ AssociationFig. 3 — Space Temperature Sensor (T-55)LEGENDNEMA — National Electrical Manufacturers’ Ass

Alarm Code 60 (Return-Air Thermistor Failure) — If thetemperature measured by this thermistor is outside the rangeof 240 to 245 F (240 to 118 C), the

Alarm Codes 80 and 81 (Low Saturated Suction Tempera-ture) — If the saturated suction temperature is less than20 F (-6.7 C) for 5 minutes, the alarm t

ThermistorTroubleshooting — The unit control sys-tem uses thermistors to measure temperatures of the supplyand return air, outdoor air and space tempe

Table 56 — Thermistor Resistance vs Temperature Values forSpace Temperature Thermistors T-55 and T-56 (10 K at 25 C Resistors)TEMP(F)RESISTANCE(Ohms)4

054064074NOTE: Blank coils are included on size 054, 064 units only for relative position. Detail is provided for coils where thermistors are located.

TransducerTroubleshooting — The unit control sys-tem may use transducers to measure pressures around thesystem. See Table 1 for pressure transducer lo

Control ModulesTurn controller power off before servicing controls. Thisensures safety and prevents damage to controller.PROCESSOR MODULE (PSIO1), CON

The COMM1 communications bus (Fig. 44) is for exter-nal communications to other equipment on the bus or to acomputer running Building Supervisor or Se

CONTROL OPTIONS MODULE (PSIO2) — See Fig. 47.The options module controls the following features:1. Relative humidity sensor. This feature requires a fi

Quick Test — The test function provides a check on con-trol inputs and outputs, and can only be conducted when theunit is in the standby mode. To put

CONTROLS AND FUNCTIONSThe internal logic circuits of the PIC controls consist es-sentially of seven sets of control loops that provide directionand co

Forcing Values — The control unit allows service per-son to input (or force) values into set points for trouble-shooting. By forcing values in submast

Table 60 — History DirectoryHISTORYSubfunction Keypad Entry Display Comment1ALARMHISTORYALRMHIST Alarm historyALARM X Latest alarm expansionALARM X Pr

Table 61 — Service DirectorySERVICESubfunction Keypad Entry Display Description1LOG ON/OFFLOG ONENTEREnter password followed byENTERLOGGEDON Logged on

Table 61 — Service Directory (cont)SERVICE (cont)Subfunction Keypad Entry Display Description6USERCONFIGURATION(cont)OSEN X Adaptive optimal start/sto

Table 61 — Service Directory (cont)SERVICE (cont)Subfunction Keypad Entry Display Description13AOSSAOSS Configure adaptive optimal start/stopBLDF X Bui

Table 61 — Service Directory (cont)SERVICE (cont)Subfunction Keypad Entry Display Description18BUILDINGPRESSUREBLD PRES Configure building pressureMLG

Table 62 — Factory/Field Configuration ProcedureKEYPAD ENTRY DISPLAY COMMENTSENTERLOG ONLOGGEDONMust enter passwordFACT CFG Factory configurationTYPE 1

Table 62 — Factory/Field Configuration Procedure (cont)KEYPAD ENTRY DISPLAY COMMENTSUSER CFG User configurationHUSN 0Humidity sensors; Default = No (0 =

Table 63 — Test DirectoryTESTSubfunction Keypad Entry Display Expansion (Press key)1 INPUTS INPUTS FACTORY/FIELD TEST OF INPUTSCSA1 X COMPRESSOR A1 ST

Table 63 — Test Directory (cont)TEST (cont)Subfunction Keypad Entry Display Expansion (Press key)2ANALOGOUTPUTS*ANLGOUT FACTORY/FIELD TEST OF ANALOG O

FORCED VALUE —Asubmaster reference value that over-writes a calculated value from a function master loop or areal value direct from a sensor. Forced v

Table 63 — Test Directory (cont)TEST (cont)Subfunction Keypad Entry Display Expansion (Press key)4COMPRESSORTESTSCOMPRSR FACTORY/FIELD TEST OF COMPRES

APPENDIXInput/Output Tables, Channels 1-30 (PSIO1, DSIO1)PSIO1 TERMINAL ID SIGNALTYPE POINT NAME — ASSIGNMENTChannel No. + — Type LevelInputs1 J7-2 J7

APPENDIX (cont)Input/Output Tables, Channels 31-60 (PSIO2, DSIO2)PSIO2 TERMINAL ID SIGNALTYPE PONT NAME — ASSIGNMENTChannel No. + − Type LevelInputs31