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Carrier NP034-074, Controls Operation And Troubleshooting

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Carrier NP034-074 Controls Operation And Troubleshooting Download Page 57

57

Sizes 088 and 104: The SCT is used to control the condenser
(outdoor) fan motor(s) (OFM) controlled by the head pressure
control relay (MMR) for each circuit. See Table 52 for fan
control points. If outdoor fan is energized in addition to
Motormaster® control, then Motormaster control will be
locked in the energized mode.
All Sizes: The 2 other stages of head pressure control are con-
trolled by the SCT on standard units, or the SCT and suction

transducers on units equipped with suction pressure transduc-
ers and suction sensors. Table 52 shows the fan configurations
and lists the on and off points for OFC1 and OFC2 (OFA and
OFB on sizes 088 and 104).

Table 52 also describes the fan sequence of operation and

defines the particular fans controlled by stage.

Table 51A — Head Pressure/Fan Cycling Control (034-078 Sizes)

CONTROL LOGIC

CONTROL OUTPUTS

LEGEND

UNIT CONFIGURATION

STAGE

OFM ON

OFM OFF

STANDARD (with standard SCT sensors)
(MMAS = Yes)
(TRNS = No)

1

SCT > (HPSP – 15 F)

SCT < (HPSP – 37 F) for 90 secs
AND Stage 2 motors OFF

2

SCT > HPSP
(start delayed 60 secs after start of 
compressor, unless SCT > 143 F)

SCT < (HPSP – 35 F) for 120 secs

With Accessory Sensors
(Pressure Transducers)
(MMAS = Yes)
(TRNS = Yes)

1

SCT > 138 F

SCT < (HPSP – 37 F) for 90 secs
AND Stage 2 motors OFF

2

SCT > HPSP
(start delayed 60 secs after start of 
compressor, unless SCT > 143 F)

SCT < (HPSP – 35 F) for 120 secs

Motormaster Control Disabled
(MMAS = No)

1

On with compressor

Off with compressor

2

SCT > HPSP

SCT < (HPSP – 35 F) for 120 secs

UNIT SIZES

FAN STAGE/CIRCUIT 

NO.

DEVICE/CHANNEL

RELAY

CONTACTOR

034-038

Stage 1/Common

PSIO-1/13

MM

MMC

Stage 2/Common

DSIO-1/29

—

OFC1

044,048

Stage 1/Common

PSIO-1/13

MM

MMC

Stage 2/Circuit 1

DSIO-2/29

—

OFC1

Stage 2/Circuit 2

DSIO-2/30

—

OFC2

054-078

Stage 1/Common

PSIO-1/13

MM

MMC1, MMC2

Stage 2/Circuit 1

DSIO-2/29

—

OFC1

Stage 2/Circuit 2

DSIO-2/30

—

OFC2

DSIO — Relay Module
HPSP — Head Pressure Set Point
MM

— Motormaster Device

MMC — Motormaster Contactor
OFC

— Outdoor-Fan Contactor

OFM

— Outdoor-Fan Motor

PSIO — Processor Module
SCT

— Saturated Condensing Temperature

Summary of Contents for NP034-074

Page 1: ...asic System Functions 12 BASIC SYSTEMS STANDBY SUPPLY FAN COOLING HEATING Service Group 16 ALERTS AND ALARMS QUICK TEST Schedules Group 18 TIME SCHEDULES Page TIMED DISCRETE OUTPUT TIMED OVERRIDE OPTI...

Page 2: ...ing this equipment and in handling all electrical components GENERAL This Controls and Troubleshooting book includes the fol lowing units and sizes 48FP034 074 48JP034 064 48NP034 074 50FB034 104 50FP...

Page 3: ...CONTROL DAV DAV FAN POWERED MIXING BOX TO ADDITIONAL TERMINALS HEATING COOLING UNITS BUILDING SUPERVISOR ROOFTOP UNIT PIC ROOFTOP UNIT PIC ROOFTOP UNIT PIC ROOFTOP UNIT PIC CCN BUS PIC COMFORT CONTRO...

Page 4: ...nd cooling equipment and zone dampers in many types of HVAC systems PIC Rooftop Information The PIC rooftop con trols cycle supply fan motor compressors and unloaders to maintain the proper temperatur...

Page 5: ...cuit Breaker CH Crankcase Heater CLO Compressor Lockout COMP Compressor CR Control Relay DPT Duct Pressure Transducer DSIO Module Relay DU Dummy Terminal ECON Economizer EQUIP Equipment FU Fuse GND Gr...

Page 6: ...erride button on the front cover to permit occu pants to override the Unoccupied Schedule if programmed See Fig 3 SPACE TEMPERATURE SENSOR T 56 Use with CV Only The T 56 Space Temperature Sensor a fie...

Page 7: ...or air control monitors the outdoor air velocity pressure with a velocity probe and pressure transducer included in the accessory package See Fig 7 NOTE Sizes 034 074 also require the installation of...

Page 8: ...provide specific operating instructions to their specific unit functions Each of these Submaster Loops receives a unique SR from its Master Loop Each Submaster Loop then surveys its own control out pu...

Page 9: ...cate the operating status of the unit at a given time To enter the Modes subfunction press and Use to determine if more than one mode is in effect See Table 5 for a list of the modes and mode names LO...

Page 10: ...et Points Period 4 Unit Units of Measure Configure Holiday Test Heat 6 System Temperatures Period 5 Unit User Configuration Exit Test 7 System Pressures Period 6 Unit Heating Coil 8 Inputs Period 7 Un...

Page 11: ...ETPOINT Current operating set point TEMPS System temperatures PRESSURE System pressures INPUTS System inputs ANLGOUT Analog outputs OUTPUTS Discrete outputs STANDBY Standby run mode To move to another...

Page 12: ...ure If reconfigured enable Data Reset Logout when complete STANDBY Standby is used to disable the unit during in stallation or service A unit in Standby mode indicates the unit control has been disabl...

Page 13: ...he maximum limit This will cause CSL to select zero stages of cooling capacity Sequence of Operation Occupied Cooling CV The econo mizer cycle must not be permitted or if permitted the out door air da...

Page 14: ...ature Reset Value Based on Space Temperature RTIO Reset Ratio SASP Supply Air Set Point SAT Supply Air Temperature SATRESET Supply Air Temperature Reset Value Based on 2 to 10 v Input SATRV Input Volt...

Page 15: ...If Auto Fan mode has been configured the fan will be OFF when there is no demand for heating When space temperature falls below OHSP the fol lowing conditions will occur 1 If the fan is configured fo...

Page 16: ...value is outside its valid range indicat ing a defective device or connection that prevents full unit op eration that an output has not functioned as expected or that a safety device has tripped Curre...

Page 17: ...puts Occupied 0 cfm 50 000 cfm 0 cfm 50 000 cfm OARH Outdoor Air Relative Humidity Inputs Occupied Unoccupied 0 100 0 100 OAT Outdoor Air Temp Temps Occupied Unoccupied 40 F 125 F 40 F 245 F RAT Retur...

Page 18: ...edules Press See Sched ule Function section on page 52 for detailed instruc tions Define Period 1 Occupied Unoccupied Define Periods 2 thru 8 as required TIMED OVERRIDE The Timed Override mode allows...

Page 19: ...CV Units Only The control will com pute a time period prior to end of the current Occupied period then allow space temperature to drift up down to the Expanded Occupied Set Point by end of scheduled...

Page 20: ...ase unit con trol calculates enthalpy in both air streams using dry bulb tem peratures and RH at each sensor location When the control determines the outdoor air enthalpy is lower than the enthalpy of...

Page 21: ...ree Cooling section below NIGHTTIME UNOCCUPIED FREE COOLING NTFC Nighttime Unoccupied Free Cooling will start the supply fan on cool nights to pre cool the structure mass by us ing only outdoor air Ni...

Page 22: ...sure is sensed by a pick up field supplied and installed located in the occupied space Operation of the Modulating Power Exhaust is a combina tion modulating staged control with fan no 1 providing mod...

Page 23: ...re Set Point press to en ter into the Service function Enter the password Press to enter into the Building Pressure subfunction Scroll down to BPSP The current pressure set point will be shown in inch...

Page 24: ...eld connection at channel 39 SMOKE PURGE Smoke Purge mode allows the system to remove smoke from the space and fill the space with fresh air in response to closure of external signal contact set Smoke...

Page 25: ...2 Medium and Cooling including Economizer Cooling or Heating mode is active then the Economizer Submaster Loop will determine Minimum Damper Position and the econo mizer will close to Minimum Damper...

Page 26: ...f next Occupied period Time is within Purge Duration Outdoor Air Temperature reading is available If all the conditions above are satisfied then IAQ Pre Occupancy Purge is enabled The supply fan and H...

Page 27: ...zer Sub master Loop to the economizer damper actuator drives the damper to the desired position If the economizer position has been dictated by another function but this controlling function is drivin...

Page 28: ...Dehumidification Cooling operation will continue For units with electric heaters simultaneous operation of cooling and electric heaters is never permitted on 50FP JP NP units If the unit control dete...

Page 29: ...oint Humidity Supply Fan Duct Pressure and VAV Control Group This group includes Duct Pressure Control IGV VFD control Supply Air Temperature SAT Reset from Space Temperature and SAT Reset from Extern...

Page 30: ...he number of the new con figuration example and then press To configure the Supply Air Temperature Reset Limit press to enter into the Space Temperature Reset Config uration subfunction Scroll down to...

Page 31: ...is required for hydronic heat ing Sequence of Operation 1 If the supply fan is OFF or if Unoccupied Free Cool ing is active the heating value is modulated to main tain desired minimum supply air tempe...

Page 32: ...accessory first stage of Outdoor Fan operation on each circuit will turn on when Saturated Condenser Temperature is greater than 138 F The first stage of outdoor fan operation will turn off when Satur...

Page 33: ...l the Loadshed signal is cleared removed by CCN The Loadshed mode is limited to 1 hour If the Loadshed mode is not cleared by the Loadshed option before the 1 hour limit expires the mode is automatica...

Page 34: ...MPERATURE SENSOR T 55 and CEC0121448 01 The space temperature sensor is shipped standard with every unit and is located in the main control box Space temperature sensor wires are to be connected to te...

Page 35: ...require that room terminals be controlled to go to the Minimum Heating position when the unit goes into the unoccupied or occupied heating mode The HIR function is provided for this control When the u...

Page 36: ...8 TB2 9 10 SIZES 054 104 TO ROOM TERMINALS HIR 2 HIR SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 RED BLK RED BLK RED BLK RED BLK TO PROCESSOR MODULE NO 1 RED BLK 2 TB2 1 1 TB3 3 SIZES 034 048 SIZES 054 104 S...

Page 37: ...LY FIELD SUPPLIED 24 V ISOLATED POWER SUPPLY 24V 3 4 LEGEND DSIO Relay Module Fig 18 Remote START UNOCCUPIED Control LEGEND TB Terminal Block Field Wiring Component Terminal Terminal Block Terminal Fi...

Page 38: ...S 054 104 14 SIZES 034 048 TB2 SIZES 054 104 TB2 Fig 21 Indoor Air Quality LEGEND Fig 20 Smoke Control SWITCH NUMBER SWITCH CONFIGURATION VOLTAGE FUNCTION SW 1 N O 24 Activate Fire Shutdown Mode SW 2...

Page 39: ...LEGEND Fig 25 Hydronic Heating TB Terminal Block Field Wiring Component Terminal LEGEND Fig 26 Freezestat TB Terminal Block Field Wiring Component Terminal Terminal Block Terminal LEGEND Fig 22 Outdo...

Page 40: ...TOR SUCTION GAS TEMPERATURE THERMISTOR 1 2 6 7 2 3 5 6 J7 PSIO NO 2 CHANNEL 31 CHANNEL 32 SIZES 034 048 9 10 TB3 3 4 TB2 SIZES 054 104 RED GRN BLK COMM 1 2 3 PSIO NO 1 COMM 1 1 2 3 4 RED BLK WHT TO CC...

Page 41: ...hing the button on the front Refer to Space Temperature Sensor T 55 section on page 34 for wir ing details ACCESSORY SPACE TEMPERATURE SENSOR T 56 The T 56 sensor part no CEC0121503 01 oper ates the s...

Page 42: ...42 Fig 32 Auxiliary Control Box Details Size 034 048 Units LEGEND BP Building Pressure DP Duct Pressure PL Plug PS Pressure Switch Fig 31 Auxiliary Control Box Location Size 054 104 Units...

Page 43: ...ed Shielded Cables The following color code is recommended NOTE If a cable with a different color scheme is selected a similar color code should be adopted for the entire network At each system elemen...

Page 44: ...y using ASCII data stream conversion DataLink Monitor and control read write using ASCII data stream conversion BAClink Monitor and control read write using BAC net protocol DATALINK AND DATAPORT Data...

Page 45: ...AE Class 3 BACnet standard ANSI ASHRAE Standard 135 1995 and supports the following BACnet standard application services Read and write properties to supported objects Device management services Alarm...

Page 46: ...bing connect the switch to probes located both up stream and downstream of the unit filters The switch must be set prior to unit operation To set the switch turn the adjustment screw on top center of...

Page 47: ...read OCSP 72 Set points can be changed by the user provided that the val ues are within the allowable range for the input If the input is not within the allowable range the original value will remain...

Page 48: ...xt display the current date in month date and year format The month is also entered as a number 1 January 2 February 12 December In the following example the day time and date will be set Assume the c...

Page 49: ...enter time X LVM X Daylight leave month X LVD X Daylight leave day X LVT hh mm Daylight leave time X 5 HOLIDAY TIMES HOLIDAY Holiday configuration mm dd dur Holiday mm dd dur days long mm dd dur Holid...

Page 50: ...er exhaust on set point 1 percent 90 30 to 100 PES2 Power exhaust on set point 2 percent 90 30 to 100 RTIO Reset ratio 3 0 to 10 SASP Supply air set point F 55 F 45 to 70 F SPSP Static pressure set po...

Page 51: ...d Cooling COOLING ECONMIZR 25 Standby STBY YES 26 Optimal Start AOSS OSEN ENB 27 Unoccupied PERIOD 1 28 IAQ Purge IAQ PURG ENB 29 Optimal Stop AOSS OSEN DSB 30 Occupied Heating HEATCOI MODULATING OHEN...

Page 52: ...d 3 is scheduled for Wednesday 7 00 a m to 9 30 p m 4 Period 4 is scheduled for Thursday and Friday from 7 00 a m to 5 00 p m 5 Period 5 is scheduled for Saturday from 7 00 a m to 12 00 p m To program...

Page 53: ...cations are lost with the network Start Unit 1 Put the ON OFF switch in the ON position Close the control circuit breaker CCB which will energize the control circuit and the crankcase heaters 2 Using...

Page 54: ...4 PERIOD 3 PERIOD 3 Period 3 Time Schedule I Same as Period 1 Subfunction 5 PERIOD 4 PERIOD 4 Period 4 Time Schedule I Same as Period 1 Subfunction 6 PERIOD 5 PERIOD 5 Period 5 Time Schedule I Same a...

Page 55: ...upply fan must be ON for cooling control to operate Sequence is as follows 1 Unit must not be in heating mode 2 Master Loop will survey occupancy status Supply Air Set Point SASP and any Supply Air Te...

Page 56: ...initiated before the unit schedule designated occupied time Unit must have a valid occupancy schedule program or be connected to the network or DAV with occupancy schedules 2 HIR is not applicable on...

Page 57: ...andard SCT sensors MMAS Yes TRNS No 1 SCT HPSP 15 F SCT HPSP 37 F for 90 secs AND Stage 2 motors OFF 2 SCT HPSP start delayed 60 secs after start of compressor unless SCT 143 F SCT HPSP 35 F for 120 s...

Page 58: ...HPSP 37 F for 90 secs AND Second Stage motors OFF Second Stage A 3 5 B 4 6 SCT HPSP start delayed 60 secs after start of compressor unless SCT 143 F SCT HPSP 35 F for two minutes AND superheat greater...

Page 59: ...ROLLED 034 038 1 Com MM MMC OFM1 2 Com OFC1 OFM2 044 048 1 Com MM MMC OFM2 2 1 OFC1 OFM1 2 OFC2 OFM3 054 064 1 Com MM MMC1 MMC2 OFM3 OFM4 2 1 OFC1 OFM1 2 OFC2 OFM2 074 078 1 Com MM MMC1 MMC2 OFM3 OFM5...

Page 60: ...to 5 0 6 Observe the operation of the controlled device for a few minutes If the device oscillates every few seconds around the forced value then lower the SMG by small amounts until the output steadi...

Page 61: ...code has been displayed to expand the code into a full definition Press on the keypad to determine a configured alert limit Then access the subfunction per Table 14 to de termine the actual value bein...

Page 62: ...Keypad Entry Display Expansion Press key 1 ALARMS ALARMS CURRENT ALARMS ALARM 51 COMPRESSOR A1 FAULT ALARM 52 COMPRESOR A2 FAULT Sizes 088 104 Only ALARM 53 COMPRESSOR A1 STATUS ALARM 55 COMPRESSOR B1...

Page 63: ...MP LOW LIMIT ALERT 155 OUTSIDE AIR TEMP HIGH LIMIT ALERT 156 SPACE TEMP LOW LIMIT ALERT 157 SPACE TEMP HIGH LIMIT ALERT 158 STATIC PRESSURE LOW LIMIT ALERT 159 STATIC PRESSURE HIGH LIMIT ALERT 160 REL...

Page 64: ...LD TEST MODE 41 MODE IS HIGH HUMIDITY OVERRIDE MODE 42 MODE IS IAQ OAC CONTROL Sizes 088 104 Only 4 STAGES STAGES CURRENT STAGES COOL X COOLING STAGES X CPC X COOLING PERCENT CAPACITY X HEAT X HEATING...

Page 65: ...TUS X CSB1 X COMPRESSOR B1 STATUS X CFA1 X COMPRESSOR A1 SAFETY X CFB1 X COMPRESSOR B1 SAFETY X CFA2 X COMPRESSOR A2 SAFETY X Sizes 088 and 104 Only CFB2 X COMPRESSOR B2 SAFETY X Sizes 088 and 104 Onl...

Page 66: ...2 POSITION X 034 078 Only X EC2P X ECONOMIZER 2 POSITION X 0 Open 1 Closed MM X MOTOR MASTER FAN STAGE 1 X 034 078 Only FR2 X OUTDOOR FAN 2 X 034 078 Only FR3 X OUTDOOR FAN 3 X 034 078 Only MMA X CIR...

Page 67: ...ing or forcing the heating coil valve to 100 open This is useful for problem diagnosis and as a preliminary step before running the test function Outputs This subfunction displays the vari ous system...

Page 68: ...4 ON OFF OFF ON ON 8 71 5 ON OFF OFF ON OFF 10 100 COOLING STAGE SIZE 044 UNITS Lead Circuit Lag Circuit Active Cyls Percent Capacity Comp 1 Unloader U1 Comp 2 Unloader U2 0 OFF OFF OFF OFF 0 0 1 ON O...

Page 69: ...ON 8 62 5 ON OFF OFF ON ON OFF 10 81 6 ON OFF OFF ON OFF OFF 12 100 COOLING STAGE SIZE 088 UNITS Lead Circuit Lag Circuit Active Cyls Percent Capacity Comp A1 Unloader UA1 Unloader UA2 Comp B1 Unload...

Page 70: ...6 58 4 ON OFF OFF ON ON 8 79 5 ON OFF OFF ON OFF 10 100 COOLING STAGE SIZE 054 UNITS Lead Circuit Lag Circuit Active Cyls Percent Capacity Comp 1 Unloader U1 Unloader UA1 Comp 2 Unloader U2 Unloader...

Page 71: ...sor mod ule and other control modules 8 Operation of the unit blocked by the demand limit function 9 Unit is in Standby mode 10 Unit is turned off through the CCN network 11 Unit supply air temperatur...

Page 72: ...effect NOTE To disable unit operation press and put the unit in Standby mode DIAGNOSTIC ALARM CODES AND POSSIBLE CAUSES See Table 58 Alarm Codes 51 and 55 Compressor Fault Alarm code 51 is for a fault...

Page 73: ...e transducers 63 Saturated Condensing Ther mistor Failure Circuit B Circuit B shut down Automatic Bad thermistor wiring error or loose connection This alarm is only valid when unit does not have press...

Page 74: ...87 Not used 88 Hydronic Coil Freeze Stat Economizer at minimum position heating coil valve fully open supply air fan shut off Automatic Low temperature outdoor air used with minimum airflow Unit is in...

Page 75: ...s been reset The probable cause for this condition is a faulty or improperly connected plug a wiring error or a faulty module Alarm Code 72 Loss of Communications With DSIO2 If communication is lost w...

Page 76: ...supplied normally open dry contacts connected to PSIO2 at plug J7 bottom to activate the alarms Reset of this alarm is automatic once the problem is corrected Alarm Code 93 Linkage Failure DAV System...

Page 77: ...35 66 6564 67 6399 68 6237 69 6081 70 5929 71 5781 72 5637 73 5497 TEMP F RESISTANCE Ohms 25 98010 20 82627 15 69790 10 59081 5 50143 0 42678 5 36435 10 31201 15 26804 20 23096 25 19960 30 17297 35 15...

Page 78: ...F RESISTANCE Ohms 84 8563 85 8378 86 8197 87 8021 88 7849 89 7681 90 7517 91 7357 92 7201 93 7049 94 6900 95 6755 96 6613 97 6475 98 6340 99 6209 100 6080 101 5954 102 5832 103 5712 104 5595 105 5481...

Page 79: ...78 NOTE Blank coils are included on size 054 064 units only for relative position Detail is provided for coils where thermistors are located Fig 40 Thermistor T3 and T4 Locations Size 054 104 Units He...

Page 80: ...orrectly Connect a calibrated gage to the lead compressor suction or discharge pres sure connection to check transducer reading 2 Make sure that the transducer leads are properly con nected in the jun...

Page 81: ...g 43 If a terminal 2 wire is connected to terminal 1 system does not work Internal communications between control modules in the rooftop unit is carried out through the COMM3 communica tions bus A 3 w...

Page 82: ...lector Locations LEGEND HSIO Keypad and Display Module Local Interface Device Fig 43 Sensor Bus Wiring Communications LEGEND CB Circuit Breaker Fig 44 COMM1 Communications Bus Plug LEGEND PWR Power Fi...

Page 83: ...installed hydronic coil valve 8 Suction gas thermistor input 9 Freezestat switch input 10 Supply Air Temperature Reset from external signal Requires field supplied 2 to 10 vdc signal 11 Motormaster S...

Page 84: ...pressure via a differential duct pressure transducer The pressure transducer is located in the unit auxil iary control box see Fig 32 and 33 The pressure transducer s low pressure reference port is r...

Page 85: ...y interior components 9 Ensure that the charge indicator lamp is out which indicates that the VFD is discharged The lamp is located on the upper right hand corner of the terminal block If still lit wa...

Page 86: ...used for 10 minutes the display will return to the rotating default display You must press and to exit quick test To restart the test procedure press To ter minate the quick test press EXIT TST will...

Page 87: ...ly 11 seconds after the fan is enabled and prior to energizing the first selected heat stage NOTE Any selected heat stage causes that stage to be selected and all other stages will be disabled The sup...

Page 88: ...requires the following information 0 economizer minimum position is controlled by minimum position entered 1 economizer minimum position is controlled by IAQ set point 2 economizer minimum position is...

Page 89: ...on Refer to the Indoor Air Quality section on page 25 for more details Humidity This subfunction is used to read or change the configuration of the humidity option Building pressure This subfunction i...

Page 90: ...oaders 2 3 4 Sizes 034 078 Only HPSP X Head pressure set point F HEAT X Heat type 0 None 1 Water Steam 2 Elec 3 Gas HTSG X Number of heat stages 0 to 5 Sizes 034 078 Only TRNS X Transducer options 0 N...

Page 91: ...TSCH X Timed override schedules 1 Unit 2 DTCC 3 Both TOVR X Timed override value 0 to 4 hours LLAG X Lead Lag option 0 Disable 1 Enable 7 HEATING COIL HEATCOIL Configure heating coil MLG X Master loo...

Page 92: ...Submaster reference value X SMR X Submaster reference value forced 35 to 140 12 NTFC NTFC Configure nighttime free cool NTFC NTLO X NTFC lockout temp min OAT to operate NTFC F 13 AOSS AOSS Configure a...

Page 93: ...sure set point 0 to 0 50 default 0 05 BPSO X Building pressure set point offset 0 05 to 0 50 default 0 05 19 ALERT LIMITS ALRTLIMT Configure alert limits SPLO X Space temp low alert limit occupied X S...

Page 94: ...ow alert limit X BPH X Building pressure high alert limit X OACL X 034 078 OCL X 088 104 Outdoor air cfm low alert limit X OACH X 034 078 OCH X 088 104 Outdoor air cfm high alert limit X IAQL X Indoor...

Page 95: ...OP X 2 3 or 4 034 078 Only HPSP 113 Head pressure set point Default 113 F HEAT 0 Heat type Enter correct value HEAT X 0 None 1 Hot Water Steam 2 Elec 3 Gas HTSG 2 Number of Heat Stages 034 078 Only De...

Page 96: ...sensors Default No 0 No 1 Differential 2 sensors 2 Space Override 1 sensor SUSN NO Suction sensors Enter value SUSN X 0 No 1 Yes VENT 0 Ventilation control Enter value VENT X 0 SPT 1 IAQ 2 CFM 3 All...

Page 97: ...UTSIDE AIR RELATIVE HUMIDITY X FLTS X FILTER STATUS X EVAC X EVACUATION X PRES X PRESSURIZATION X PURG X SMOKE PURGE X FSD X FIRE SHUTDOWN X SCTA X CIRCUIT A SATURATED CONDENSING TEMP X STA X CIRCUIT...

Page 98: ...TING MOTOR MASTER CIRCUIT A 088 104 FR2 034 078 OFA 088 104 OUTDOOR FAN 2 TEST 034 078 CIRCUIT A OUTDOOR FAN TEST 088 104 FR2 TEST 034 078 OFA TEST 088 104 TESTING OUTDOOR FAN 2 034 078 TESTING OUTDOO...

Page 99: ...R CPA1 COMPRESSOR A1 TEST CPA1 TST TESTING COMPRESSOR A1 CPB1 COMPRESSOR B1 CPB1 TST TESTING COMPRESSOR B1 CPA2 COMPRESSOR A2 TEST 104 Only CPA2 TST TESTING COMPRESSOR A2 104 Only CPB2 COMPRESSOR B2 T...

Page 100: ...100 Fig 51 Typical Wiring Schematic Sizes 054 078 Shown...

Page 101: ...101 Fig 52 Typical Control Wiring Sizes 054 078 Shown...

Page 102: ...102 Fig 52 Typical Control Wiring Sizes 054 078 Shown cont...

Page 103: ...g 2 10 vdc Thermistor 10K STO Space Temp Offset T 56 12 J7 35 J7 36 Discrete 5 vdc Contact set FLTS Filter Status Pin 36 Discrete 10 vdc Contact set SFS Supply Fan Status Outputs 13 J6 39 J6 38 Discre...

Page 104: ...Purge 39 J7 25 J7 32 Discrete 24 vac Contact NO EVAC Evacuation 40 J7 28 J7 32 Discrete 24 vac Contact NO FSD Fire Shutdown 41 J7 31 J7 32 Discrete 24 vac Contact NO FRZ Freeze Stat 42 J7 34 J7 35 Ana...

Page 105: ...29 Discrete 24 vac Contact Set ENTH Enthalpy Switch 11 J7 31 J7 32 Analog 2 10 vdc Transducer Pressure SP Duct Static Pressure VAV J7 33 Analog 2 10 vdc Thermistor 10K STOTHERM Space Temperature Offs...

Page 106: ...Outputs 43 J6 37 J6 38 Analog 10 vdc Proportional 4 20 mA HCVOUT Heating Coil Valve 44 J6 42 J6 41 Discrete 20 vac Contact NO DTCC Discrete Time Clock Control 45 J6 43 J6 44 Analog 10 vdc Proportiona...

Page 107: ...Heat Stage 1 RO on off HS2 Heat Stage 2 RO on off HIR Heat Interlock Relay RO on off SATRESET Supply Air Set Point Reset RO F STATUS03 RH Return Space Humidity RO 0 to 100 OARH Outside Air Humidity R...

Page 108: ...Cir B Discharge Pressure RO psi SCTB Cir B Saturated Condensing Temperature RO F SSTB Cir B Saturated Suction Temperature RO F SHB Cir B Suction Superheat RO F STB Cir B Suction Temperature RO F MMB C...

Page 109: ...V RW alarm norm PURG PURG Smoke Purge BV RW alarm norm FSD FSD Fire Shutdown BV RW alarm norm FRZ FRZ Freezestat Status BI RO alarm norm HCV HCV Heating Valve AO RO 0 to 100 STATUS04 STRST STRST Space...

Page 110: ...70 F MDP MDP Economizer Minimum Damper Position AV RW Y 0 to 100 OACS OACS Outside Air CFM Set Point AV RW 0 to 50 000 CFM IAQS IAQS IAQ Set Point AV RW 0 to 5000 PPM HHOR HHOR High Humidity Override...

Page 111: ...EtP Setup ACC1 60 0 Sec DEC1 60 0 Sec UL 60 0 Hz LL 10 0 Hz Luln 1 P3 20 F P3 0 0 Hz P4 100 F P4 60 Hz tHr1 See Table 66 StC1 0 StL1 110 OLN 1 tYP 5 Gr F Fundamental FH 60 Hz Pt 2 Gr Fb Feedback FbP1...

Page 112: ...discussed in this manual including Unit Familiarization Maintenance Installation Overview Operating Sequence A large selection of product theory and skills programs are available using popular video...

Page 113: ...VES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED OPEN SUCTION DISCHARGE AND LIQUID LINE SERVICE VALVES CHECK COMPRESSOR OIL LEVEL SIGHT GLASS AND VERIFY PROPER LEVEL VERIFY THAT CRANKCASE HEATERS HAVE...

Page 114: ...NIFOLD PRESSURE STAGE NO 1 IN WG STAGE NO 2 IN WG REFRIGERANT SUCTION CIRCUIT NO 1 PSIG CIRCUIT NO 2 PSIG REFRIGERANT DISCHARGE CIRCUIT NO 1 PSIG CIRCUIT NO 2 PSIG VERIFY REFRIGERANT CHARGE USING CHAR...

Page 115: ...functions see Quick Test section on page 86 SETPOINT Set system set points per job requirements OHSP X Set occupied heat set point Range 55 80 F 68 CV only OCSP X Set occupied cool set point Range 55...

Page 116: ...Form 48 50F J 2T Pg CL 4 7 99 Replaces 48 50F J N 1T Book 1 1 Tab 1a 1b Copyright 1999 Carrier Corporation CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE NOTES CONSTANT VOLUME CONTROL CONFIGURATION KEYBO...

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