Carrier WEATHER MASTER 48P2 Specifications

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Cata

10Table 5 — Fan Performance — 48P2,P3,P4,P5040 and 50P2,P3040 Units without Discharge Plenum*LEGEND*If calculating static pressure for a 48 Series uni

100Table 88 — 5K Thermistor vs. Resistance (RTA1) (F)TEMP(F)RESISTANCE(Ohms)–25 98,010–24 94,707–23 91,522–22 88,449–21 85,486–20 82,627–19 79,871–18

101Table 89 — 5K Thermistor vs. Resistance (RTA1) (C)TEMP(C)RESISTANCE(Ohms)–32 100,260–31 94,165–30 88,480–29 83,170–28 78,125–27 73,580–26 69,250–25

102Table 90 — Suction Pressure Transducer (psig) vs. Voltage (SSP-A, SSP-B)PRESSURE(PSIG)VOLTAGEDROP (V) PRESSURE(PSIG)VOLTAGEDROP (V) PRESSURE(PSIG)V

103Table 91 — Discharge Pressure Transducer (psig) vs. VoltagePRESSURE(PSIG)VOLTAG EDROP (V)PRESSURE(PSIG)VOLTAG EDROP (V)PRESSURE(PSIG)VOLTAG EDROP (

104Table 91 — Discharge Pressure Transducer (psig) vs. Voltage (cont)PRESSURE(PSIG)VOLTAG EDROP (V)PRESSURE(PSIG)VOLTAG EDROP (V)PRESSURE(PSIG)VOLTAG

105Fig. 17 — IGC Service Analysis Logic LEGENDNOTE: Thermostat Fan Switch in the“AUTO” position.IDM — Induced-Draft MotorIGC — Inte

106Table 92 — Auto View of Run Status Display TableRun StatusoVIEWoEDT — Displays the current evapora-tor discharge air temperature during Cooling mod

107Table 93 — Economizer Run Status Display TableTable 94 — Cooling Information Display TableHigh Temp Cap Override (H.TMP) — If stages of mechani-cal

108and stop. See Table 96. This information can be used to helpdetermine why the unit is in the current mode.CCN/LINKAGE DISPLAY TABLE — The CCN/Link

109Table 99 — Compressor Starts Display TableTable 100 — Software Version Numbers Display TableAlarms and Alerts — There are a variety of differentale

11Table 6 — Fan Performance — 48P2,P3,P4,P5050 and 50P2,P3050 Units without Discharge Plenum*LEGEND*If calculating static pressure for a 48 Series uni

110while the MBB or CXB is commanding the compressorON, the compressor stops and the CSB no longer detectscurrent, causing the control to activate the

111Table 101 — Alert and Alarm CodesALARM OR ALERT NUMBERDESCRIPTION ACTION TAKEN BY CONTROL RESET METHODT048 CktA, Oil Return Not Reliable With Only

112Table 101 — Alert and Alarm Codes (cont)ALARM OR ALERT NUMBERDESCRIPTION ACTION TAKEN BY CONTROL RESET METHODA171 Staged Gas Control Board Comm Fai

113Table 101 — Alert and Alarm Codes (cont)ALARM OR ALERT NUMBERDESCRIPTION ACTION TAKEN BY CONTROL RESET METHODT610 Economizer Actuator Out of Calibr

114T075 (Return Air Thermistor Failure) — Failure of thisthermistor (TemperaturesoAIR.ToRAT) will disable any el-ements of the control which requires

115This failure follows a 3-strike methodology. When the cir-cuit is shutdown entirely, an alert (T120, T121) is generatedand a strike is logged on th

116T153 (Real Time Clock Hardware Failure) — The RTCclock chip on the MBB is not responding. Recovery is auto-matic but typically board replacement ma

117T247 (Return Air Cfm Sensor Failure) — If the return aircfm sensor (InputsoCFMoR.CFM) fails, fan tracking is notpossible and the system will shut d

118generated. No system action is taken. This is a reminder that itis time to change the filters in the unit. Recovery from this alertis through a cle

119that the actuator cannot perform its assigned function. Recov-ery requires a fix of any slipped linkage and/or a re-calibration.T613 (Econ Actuator

12Table 7 — Fan Performance — 48P2,P3,P4,P5055 and 50P2,P3055 Units without Discharge Plenum*LEGEND*If calculating static pressure for a 48 Series uni

120Fig. 19 — Typical Power Schematic (Sizes 040-075 Shown)NOT USED ON380V UNITS 208-230/460V TRANSFORMER CONNECTPRIMARY VOLTAGE: 460V

121HUMIDIMIZER OPTWHTJ4J8J6J3J5J9 J5CXBWHTOPTWHTX3AJ7MBBJ7J10TB20112TB20121FIRESHUTTB20123178DOWNREMOTE FIRESHUTDOWNCONTACTS(FIELD WIRING)TB201RCBTB20

122Fig. 21 — RXB, EXB, CEM, SCB Input/Output Connectionsa48-8604

123PL21-3TO IGC1-RTPL21-4TO IGC1-WPL21-2TO IGC1-CPL21-8TO MGV2-HIPL21-9TO IGC2-WPL21-1PL21-10TO IGC1-IFOTO IGC2-IFOPL21-5TO MGV1-HISTAGED OR MODULATIN

124J10PL57-6ORNORNPL57-7VIOVIOPL57-5BLKGRAPL57-4VIOVIOPL57-3ORNORNMBBPL57-2BLKBLKBLKBLKBLKPL20-6PL20-3ORNSMOKE AND CO2DETECTORSPL35-5BRNPL34-6OD ENTHA

125a50-8249Fig. 24 — Typical Power Wiring (115-V)a50-8249

126Fig. 25 — Typical Gas Heat Section (Size 030-050 Units Shown)a48-8413

127CONTINUED ON 24V WIRINGPL8-1/PL21-10PL21-1PL21-10PL21-8PL21-2PL21-9PL21-4PL21-3REDVIOBRNORNORNCONTINUED ON POWER LABELPL33-1PL33-2ORNBRN(HIGH HEAT

128Fig. 27 — Component Arrangement (Size 030,035 Units)a48-8605

129Fig. 28 — Component Arrangement (Size 040-075 Units)a48-8606

13Table 8 — Fan Performance — 48P2,P3,P4,P5060 and 50P2,P3060 Units without Discharge Plenum*LEGEND*If calculating static pressure for a 48 Series uni

130Fig. 29 — Component Arrangement (Size 090,100 Units)a48-8607

131LEGEND FOR FIG. 19-29Table 102 — Main Control Board (MBB) Inputs and OutputsACCSY — AccessoryACC’Y — AccessoryAN — AnalogAPS — Air Pressure SwitchB

132Table 103 — Rooftop Control Board (RXB) Inputs and OutputsPOINT NAME POINT DESCRIPTION TYPE OF I/O I/O POINT NAMECONNECTORPIN NO.INPUTSRMTIN Remote

133Table 104 — Economizer Control Board (EXB) Inputs and OutputsTable 105 — Staged Gas Control Board (SCB) Inputs and OutputsTable 106 — Control Expan

134Fig. 31 — Economizer Control Board (EXB) and Rooftop Control Board (RXB)ADDRESS DIPSWITCHES ALL ONRED LED-STATUSGREEN LED-LEN (LOCAL EQUIPMENT NETW

135Table 107 — Compressor Expansion Board (CXB) Inputs and OutputsTable 108 — Expansion Valve Control Board (EXV) Inputs and OutputsPOINT NAME POINT D

136Table 109 — Field Terminal Connections LEGENDCURRENT SENSOR BOARD (CSB) — This board moni-tors the status of the compressor by sens

137Table 110 — IGC Board Inputs and OutputsTIMER RELAY CONTROL BOARD (TR1) — The TR1 isused on modulating gas heat equipped units only. It is locatedi

138LEN. Additional VFD parameters are set by the ComfortLinkcontrols, and sent to the VFD over the LEN at power up of theVFD. The VFD faults can be re

139Table 114 — Thermistors and Unit Operation Control Pressure Transducers LEGENDSENSOR DESCRIPTION AND LOCATION PART NO.ThermistorsCCTC

14Table 9 — Fan Performance — 48P2,P3,P4,P5070 and 50P2,P3070 Units without Discharge Plenum*LEGEND*If calculating static pressure for a 48 Series uni

140SPACE CO2 SENSORS — The ComfortLink controls alsosupport a CO2 IAQ sensor that can be located in the space foruse in demand ventilation. The senso

141SERVICEService Access — All unit components can be reachedthrough clearly labeled hinged access doors. These doors arenot equipped with tiebacks, s

142COMPRESSORSSizes 030,035 — Access to the compressors is below the unit-control box.Sizes 040-060 — Access to the compressors is through thedoors on

143 ECONOMIZER DAMPER MOTOR(S) — On units soequipped, the economizer motor(s) is located in the mixingbox section. Access to it is through the door

144RETURN-AIR FILTERS — Access to these filters is throughthe door marked FILTER SECTION. Filters in upper and low-er bag filter tracks can only be re

1455. Adjust until proper belt tension (1/2-in. [13 mm] deflec-tion with one finger centered between pulleys) isobtained. Be sure to adjust both adjus

146 Cleaning — Inspect unit at the beginning of each heatingand cooling season and during each season as operating condi-tions may require.MICROCHANNE

1472. Put on personal protective equipment including safetyglasses and/or face shield, waterproof clothing andgloves. It is recommended to use full c

1483. At the end of the 5-minute period, switch back into Cool-ing mode through the Service Test function (ServiceTestoCOOLoRHV) by switching RHV to O

14930 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating859095100105110115120125130

15Table 10 — Fan Performance — 50P2,P3030 Units with Discharge Plenum and 50P4,P5030 UnitsLEGENDNOTES:1. Fan performance is based on wet coils and cle

15035 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating8590951001051101151201251301

15140 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating7580859095100105110115120125

15240 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating758085909510010511011512012

15350 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating7580859095100105110115120125

15450 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating758085909510010511011512012

15555 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating8590951001051101151201251301

15655 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating758085909510010511011512012

15760 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating8590951001051101151201251301

15860 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating758085909510010511011512012

15970 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating7580859095100105110115120125

16Table 11 — Fan Performance — 50P2,P3035 Units with Discharge Plenum and 50P4,P5035 UnitsLEGENDNOTES:1. Fan performance is based on wet coils and cle

16070 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating758085909510010511011512012

16175 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating8085909510010511011512012513

16275 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating808590951001051101151201251

16390 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating8085909510010511011512012513

16490 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating758085909510010511011512012

165100 Ton STD CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating758085909510010511011512012

166100 Ton HIGH CAP CIRCUIT A Charging ChartAll Compressors on a Circuit Must be OperatingAll Outdoor Fans Must be Operating75808590951001051101151201

167Gas System Adjustment (48P Only)TWO-STAGE GAS VALVE ADJUSTMENT — The gasvalve opens and closes in response to the unit control.When power is sup

168Filter Drier — Replace whenever the moisture/liquid indi-cator shows moisture in the system.Liquid Line Service Valves — Use caution whenclosing li

169must then be manually reset by power down and power up ofthe unit.LIMIT SWITCH THERMISTOR (Staged Gas UnitOnly) — The limit switch thermistor is a

17Table 12 — Fan Performance — 50P2,P3040 Units with Discharge Plenum and 50P4,P5040 UnitsLEGENDNOTES:1. Fan performance is based on wet coils and cle

170APPENDIX A — LOCAL DISPLAY TABLESMODE — RUN STATUSITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO.VIEW AUTO VIEW OF RUN STATUSoHVAC ascii

171APPENDIX A — LOCAL DISPLAY TABLESMODE — RUN STATUS (cont)ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO.TRIP MODE TRIP HELPERoUN.C.S Uno

172APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — SERVICE TESTITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO.TEST Service Test Mode ON/OFF

173APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — TEMPERATURESMODE — PRESSURESMODE — SETPOINTSITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUSAIR.T A

174APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — INPUTS*The display text changes depending on the remote switch configuration (ConfigurationoUNIToRM.

175APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — OUTPUTSITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUSFANS FANSoS.FAN Supply Fan Relay ON/OFF SFAN

176APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATIONITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO.UNIT UNIT CONFIGURATIONoC.TYP Mach

177APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATION (cont)ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO.SP SUPPLY STATIC PRESS.CFG.

178APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATION (cont)ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO.D.LV.T COOL/HEAT SETPT. OFF

179APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATION (cont)* Model number dependent.ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO.AL

18Table 13 — Fan Performance — 50P2,P3050 Units with Discharge Plenum and 50P4,P5050 UnitsLEGENDNOTES:1. Fan performance is based on wet coils and cle

180APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — TIMECLOCKMODE — OPERATING MODESMODE — ALARMSACRONYM NAME RANGE UNITS CNN POINT DEFAULTS PAGE NO.TIME

181APPENDIX B — CCN TABLESAll P Series units with ComtfortLink controls have a portfor interface with the Carrier Comfort Network® (CCN) sys-tem. On T

182APPENDIX B — CCN TABLES (cont)STATUS DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSECONOMZREconomizer Act.Curr.Pos. %

183APPENDIX B — CCN TABLES (cont)STATUS DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSMODETRIPUnoccup. Cool Mode Start UC

184APPENDIX B — CCN TABLES (cont)STATUS DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSUOUTPUTSFANS Supply Fan Relay On/

185APPENDIX B — CCN TABLES (cont)SET POINT TABLECONFIG TABLESSERVICE-CONFIG TABLESTABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTSET_PNTOccupied Hea

186APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTALLMSPT lo alert limit/occ -10-245 dF SP

187APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTCOOLEnable Compressor A1 Enable/Disable

188APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTECONEconomizer Installed ? Yes/No ECON_E

189APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTIAQ_Economizer Min.Position 0 - 100 % EC

19Table 14 — Fan Performance — 50P2,P3055 Units with Discharge Plenum and 50P4,P5055 UnitsLEGENDNOTES:1. Fan performance is based on wet coils and cle

190APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTUNITMachine Control Type 1-6 CTRLTYPE 4U

191APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLESTABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSALARMS01Active Alarm ascii ALARM_01-

192APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSCOMPTRIPComp. Security Passwor

193APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSEC_DIAGEconomizer Active ? Yes

194APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSLINKDATASupervisory Element #

195APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSPRESDUCTStatic Pressure "

196APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSTESTACTCEconomizer Act.Cmd.Pos

197APPENDIX B — CCN TABLES (cont)TIME SCHEDULE CONFIG TABLEAllowable Entries: Day not selected = 0 Day selected = 1APPENDIX C — UNIT STAGING TABLESADA

198APPENDIX C — UNIT STAGING TABLES (cont)VAV (WITH DIGITAL COMPRESSOR) STAGING SEQUENCE (Sizes 050-075)*On units with optional digital scroll compres

199APPENDIX D — VFD INFORMATIONOn units equipped with optional supply fan and/or exhaustfan VFDs, the fan speed is controlled by a 3-phase VFD. Thesup

2CONTENTS (cont)PageSmoke Control Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . 77• FIRE SMOKE INPUTS• AIRFLOW CONTROL DURING FIRE/SMOKE

20Table 15 — Fan Performance — 50P2,P3060 Units with Discharge Plenum and 50P4,P5060 UnitsLEGENDNOTES:1. Fan performance is based on wet coils and cle

200APPENDIX D — VFD INFORMATION (cont)Table B — VFD Parameters Configured by Carrier Assistant* 41 for Supply Fan Motor VFD, 42 for Exhaust Fan Motor

201APPENDIX D — VFD INFORMATION (cont)Table E — VFD ComfortLink Control VariablesTable F — VFD ComfortLink Command VariablesVFD Operation — The VFD ke

202APPENDIX D — VFD INFORMATION (cont)START UP WITH CARRIER ASSISTANT — Initial start-up has been performed at the factory. If a VFD has beenreplaced

203APPENDIX D — VFD INFORMATION (cont)STANDARD DISPLAY MODE — Use the standard displaymode to read information on the drive status and operate thedriv

204APPENDIX D — VFD INFORMATION (cont)Upload All Parameters — To upload and store parameters inthe control panel from the VFD, perform the followingpr

205APPENDIX D — VFD INFORMATION (cont)3. Install speed signal wires to AI-1 and AGND. This inputis set at the factory for a 4 to 20 mA signal. If a 0

206APPENDIX D — VFD INFORMATION (cont)To replace the main fan for frame sizes R5 and R6, performthe following (see Fig. E):1. Remove power from drive.

207APPENDIX D — VFD INFORMATION (cont)Table G — Fault CodesFAULT CODEFAULT NAME IN PANELDESCRIPTION AND RECOMMENDED CORRECTIVE ACTION1 OVERCURRENTOutp

208APPENDIX D — VFD INFORMATION (cont)Table H — Alarm Codes*This alarm is not indicated by a relay output, even when the relay output is configured to

209APPENDIX E — MODE SELECTION PROCESSThe following section is to be used in conjunction withFig. 4 on page 42. To help determine why the unit control

21Table 16 — Fan Performance — 50P2,P3070 Units with Discharge Plenum and 50P4,P5070 UnitsLEGENDNOTES:1. Fan performance is based on wet coils and cle

210APPENDIX E — MODE SELECTION PROCESS (cont)HVAC mode: ("Vent ")— This is a normal operation mode where no heating or cooling i

211APPENDIX F — UPC OPEN CONTROLLERThe following section is used to configure the UPC Opencontroller. The UPC Open controller is mounted in a separate

212APPENDIX F — UPC OPEN CONTROLLER (cont)Configuring the BAS Port for BACnet MS/TP — Use the same baud rate and communication settingsfor all control

213APPENDIX F — UPC OPEN CONTROLLER (cont)To install a BT485 terminator, push the BT485 terminatoron to the BT485 connector located near the BACnet co

214APPENDIX F — UPC OPEN CONTROLLER (cont)Table M — Open System Wiring Specifications and Recommended Vendors LEGENDLocal

215APPENDIX F — UPC OPEN CONTROLLER (cont)Configuring the UPC Open Controller's Prop-erties — The UPC Open device and ComfortLink controlmust be

216APPENDIX F — UPC OPEN CONTROLLER (cont)NETWORK POINTS LISTSee legend on page 221.BACNETOBJECT IDPOINT DESCRIPTIONREAD/WRITEUNITSDEFAULTVALUERANGEBA

217APPENDIX F — UPC OPEN CONTROLLER (cont)NETWORK POINTS LIST (cont)See legend on page 221.BACNETOBJECT IDPOINT DESCRIPTIONREAD/WRITEUNITSDEFAULTVALUE

218APPENDIX F — UPC OPEN CONTROLLER (cont)NETWORK POINTS LIST (cont)See legend on page 221.BACNETOBJECT IDPOINT DESCRIPTIONREAD/WRITEUNITSDEFAULTVALUE

219APPENDIX F — UPC OPEN CONTROLLER (cont)NETWORK POINTS LIST (cont)See legend on page 221.BACNETOBJECT IDPOINT DESCRIPTIONREAD/WRITEUNITSDEFAULTVALUE

22Table 17 — Fan Performance — 48/50P2,P3,P4,P5075 Units with Forward-Curved Fan*LEGEND*If calculating static pressure for a 48 Series unit, be sure t

220APPENDIX F — UPC OPEN CONTROLLER (cont)NETWORK POINTS LIST (cont)See legend on page 221.BACNETOBJECT IDPOINT DESCRIPTIONREAD/WRITEUNITSDEFAULTVALUE

221APPENDIX F — UPC OPEN CONTROLLER (cont)NETWORK POINTS LIST (cont) LEGENDBACNETOBJECT IDPOINT DESCRIPTIONREAD/WRITEUNI

222APPENDIX G — OPTIONAL MOTORMASTER® V CONTROLGENERALThis appendix contains instructions for the start-up and ser-vice of the optional Motormaster V

223APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)MOTORMASTERCONTROLFig. O — MMV Control Location — 48/50P050-060 Unitsa48-8610MOTORMASTER ACONTRO

224APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)Configure Motormaster® V Control — TheMotormaster V control is configured for proportiona

225APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)MOTORMASTER STARTCONTACT LOCATIONUNITVOLTAGETERMINALNUMBER575-3-60 1208-3-60 1230-3-60 1380-3-60

226APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)Drive Programming — Table Q shows all program pa-rameters for each of the operating modes. Refer

227APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)Table Q — Program Parameters for the Operating ModeLEGENDPARAMETERS DESCRIPTION MODE 1 MODE 2 MO

228APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)EPM Chip — The drive uses a electronic programmingmodule (EPM) chip to store the program paramet

23Table 18 — Fan Performance — 48/50P2,P3,P4,P5075 Units with Airfoil Fan*LEGEND*If calculating static pressure for a 48 Series unit, be sure to add g

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Cata

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Cata

CL-2- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

CL-3CONTROLS SET POINT AND CONFIGURATION LOG (cont)ITEM EXPANSION RANGE DEFAULT SETTINGECON ECONOMIZER CONFIGURATIONoEC.EN Economizer Installed? Yes/N

CL-4- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

CL-5CONTROLS SET POINT AND CONFIGURATION LOG (cont)ITEM EXPANSION RANGE DEFAULT SETTINGIAQ (cont)oAQ.SP AIR QUALITY SETPOINTSoAQ.SPoIQ.O.P IAQ Econo O

CL-6- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

CL-7CONTROLS SET POINT AND CONFIGURATION LOG (cont)*Model number dependent.ITEM EXPANSION RANGE DEFAULT SETTINGS.VFD SUPPLY FAN VFD CONFIGoN.VLT VFD1

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Cata

24Table 19 — Fan Performance — 48/50P2,P3,P4,P5090 Units with Forward-Curved Fan*LEGEND*If calculating static pressure for a 48 Series unit, be sure t

25Table 20 — Fan Performance — 48/50P2,P3,P4,P5090 Units with Airfoil Fan*LEGEND*If calculating static pressure for a 48 Series unit, be sure to add g

26Table 21 — Fan Performance — 48/50P2,P3,P4,P5100 Units with Forward-Curved Fan*LEGEND*If calculating static pressure for a 48 Series unit, be sure t

27Table 22 — Fan Performance — 48/50P2,P3,P4,P5100 Units with Airfoil Fan*LEGEND*If calculating static pressure for a 48 Series unit, be sure to add g

28Table 23 — Fan Performance — Standard Capacity Power Exhaust48/50P2,P3,P4,P5030-050 Units48/50P2,P3,P4,P5055-100 UnitsBhp — Brake HorsepowerAIRFLOW(

29Table 24 — Fan Performance — Optional High-Capacity Power Exhaust(48/50P2,P3,P4,P5075-100)LEGENDBhp — Brake HorsepowerAIRFLOW(cfm)AVAILABLE EXTERNAL

3GENERALThis book contains Start-Up, Controls, Operation, Trouble-shooting and Service information for the 48/50P Seriesrooftop units. See Table 1. Th

30Table 25 — Component Pressure Drops (in. wg)SIZE 030-050 UNITSSIZE 055-070 UNITSSIZE 075-100 UNITS*Available on vertical return and discharge units

31Table 26 — Supply Fan Motor Limitations (Sizes 030-070) LEGENDNOTES:1. Extensive motor and electrical testing on the Carri

32Table 28 — Optional High-Capacity Power Exhaust Systems Motor Limitations (Sizes 075-100)LEGENDNOTES:1. Extensive motor and electrical testing on th

332. Under the Setpoints menu, set the followingconfigurations:3. See the Economizer Options section on this page for ad-ditional economizer option co

34ConfigurationoBPoBF.CF=2 (Modulating PowerExhaust with Two Actuators Option) — For modulating ex-haust, the ConfigurationoBP submenu, configure thef

352 and set days Saturday and Sunday to ON with the desired Oc-cupied On and Off times.NOTE: By default, the time schedule periods are programmedfor 2

36Table 29 — Service TestHumidi-Mizer® System — In the Humidi-MiZer(HMZR) sub-menu, it will be possible to control and calibratethe Humidi-MiZer modul

37will automatically go through the calibration process anytimethe unit is powered down, unit power is cycled, or anytimethere is a loss of communicat

38B.EXV) and condenser valve must equal 100%. Forexample, if the condenser modulating valve is only 80%open, then the gas bypass modulating valve must

39A 4 to 20 mA input that can reduce or limit capacity linearly toa set point percentage.In either case, it will be necessary to install a controls ex

4• Space ventilation control, in Occupied and Unoccupiedperiods, using CO2 sensors or external signals, with ven-tilation defined by damper position o

40on the differential air quality (DAQ). If DAQ rises aboveD.F.ON, the control will request the fan on until DAQ falls be-low D.F.OF.NOTE: If D.F.ON i

415. Fire Shut Down (fire shutdown condition based on theFire Shutdown Input (InputsoFIREoFSD).(“Fire-Shutdown Mode”)6. Emergency Stop, which is force

42System Mode =OFF?Inputs -> FIRE ->FSD in alarm?HVAC Mode = OFF(Fire Shutdown)HVAC Mode = OFF(Disabled)Unit not in factorytest AND fire-smokeco

43HVAC Mode — FREEZESTAT TRIP (25) — If the freeze-stat trips, the unit enters the Freezestat Trip HVAC mode. Thesupply fan will run, the hydronic hea

44ConfigurationoDMD.LoDM.L.S = 2 (4-20 MA CTRL)(Demand Limiting using a 4 to 20 mA sensor)ConfigurationoIAQoAQ.CFoIQ.I.C = 1 (IAQ DISCRETE)(IAQ discre

45or thermostat by controlling the unit to either a low or high coolsupply air set point. The control type (ConfigurationoUNIToC.TYP) determines the s

46Enable Compressor B2 (B2.EN) — This configuration isused to disable the B2 compressor in case of failure for size 40to 100 units. It is always disab

47capacity reduction. This ramped reduction is only imposed on adecrease in digital scroll capacity. An increase in capacity willcontinue to follow th

48If (rate after) is less than (rate prior minus 1.25), alarmA140 is generated. This alarm will disable mechanical coolingand will require a manual re

49Table 36 — Cool/Heat Set Point Offsets ConfigurationOperating modes are under Operating ModesoMODE.Cool Mode Evaluation Logic — The first thing the

5and the keys until the desired display item is found.At any time, the user can move back a mode level by pressingthe key. Once an item has been sel

50Table 37 — Run Status Mode Trip HelperThe controlling temperature is “TEMP” and is in the middleof the table for easy reference. The HVAC mode can a

51Table 38 — Run Status Cool DisplayPull Down Cap Override (PULL) — If the error from setpoint is above 4qF, and the rate of change is less than –1q

52NOTE: “Error” is clamped between –10 and +50 and “Errorrate” is clamped between –5 and +5.This “SUM” will be compared against the “Z” calculationsin

53To use Demand Limiting, select the type of demand limitingto use. This is done with the Demand Limit Select configura-tion (ConfigurationoDMD.LoDM.L

54 Size 030, 035Contactor OFM(s)cigoLdellortnoCdellornoCdraoBerawtfoStiucriCCommon CONDFAN1 MBB Rly 6 OFC1 OFM1Comp A1 or B1 ONCommon CONDFAN2 MBB Rly

55Size 050, 055, 060Contactor OFM(s)cigoLdellortnoCdellornoCdraoBerawtfoStiucriCCommon CONDFAN1 MBB Rly 6 OFC1 OFM1Comp A1, A2, B1 or B2 ONCommon COND

56CIRCUIT ACOILSSize 090, 100Contactor OFM(s)cigoLdellortnoCdellornoCdraoBerawtfoStiucriCA CONDFAN3 RCB Rly 1 OFC3 OFM6 Circuit A SCT or OATB CONDFAN2

57Table 39 — Demand Limit ConfigurationWhen a condenser fan output is common to both refrigera-tion circuits, in other words when the fan(s) will affe

58Table 40 — Heating Configuration*Some defaults are model number dependent. NOTE: If the user does not relocate this sensor for the 2-stageelectric o

59Demand Level Low Heat on Offset (L.H.ON) — This is theheating set point offset below the heating set point at whichpoint Low Heat starts.Demand Leve

6Table 2 — Scrolling Marquee Menu Display StructureRUNSTATUSSERVICETESTTEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATIONTIMECLOCKOPERATING

60Table 42 — Mode Trip Helper TableHydronic Heating LogicIf the HVAC mode is LOW HEAT:• The control will command the supply fan on• The control will m

61Table 43 — Hydronic Heat ConfigurationTable 44 — Staged Heat Configuration*Some configurations are model number dependent.Table 45 — Staged Gas Heat

62This routine is run once every “HT.TM” seconds. Everytime the routine is run, the calculated sum is added to the con-trol output value. In this mann

63Table 47 — Staged Gas Heat Control Steps (HT.ST = 0)Table 48 — Staged Gas Heat Control Steps (HT.ST = 1)Table 49 — Staged Gas Heat Control Steps (HT

64Table 52 — Modulating Gas Heat Control Steps (HT.ST = 5)* ON when OutputsoHEAToH1.CP > 54%, OFF when OutputsoHEAToH1.CP < 46%.The electric hea

65in parallel. For staged gas heat, each board is controlled sepa-rately. When energized, an LED on the IGC board will beturned on. See Table 57 for L

66device. This only applies to two-stage gas or electric heatingtypes (ConfigurationoHEATo HT.CF=1 or 2).Determine a location in the supply duct that

67OPERATION FOR VAV — On VAV units equipped with aVFD and a proper static pressure sensor, when SP.CF, SP.S andSP.SP are configured, a PID routine per

68Table 59 — Static Pressure Control ConfigurationStatic Pressure PID Config (S.PID) — Static pressure PIDconfiguration can be accessed under this hea

69Table 60 — Static Pressure Reset Related PointsStatic Pressure Reset (SP.RS) — This variable reflects thevalue of a static pressure reset signal app

7START-UPUnit Preparation — Check that unit has been installed inaccordance with the installation instructions and applicablecodes. Make sure that the

70determine the changeover condition that permits free coolingoperation. This unit can also have the following devicesinstalled to enhance economizer

71If the user selects one of the Honeywell curves, A,B,C or D,then OA.E.C options 1-4 should be selected. See Fig. 11 for adiagram of these curves on

72Control Angle Alarm Configuration — The economizeractuator determines its end stops through a calibration at thefactory. Field-installed actuators m

73Economizer Minimum Flow Rate (O.C.MX) — This optionreplaces the Economizer Minimum Position (ConfigurationoECONoEC.MN) when the outdoor air cfm sens

74Table 64 — Economizer Run Status TableBuilding Pressure Control — This control sequenceprovides control of the building pressure through the modulat

75Table 65 — Building Pressure Configuration*Some configurations are model number dependent.Fan Track Max Clamp (FT.MX) — For BP.CF = 5, thisreturn/ex

76pressure (PressuresoAIR.PoBP) rises above the buildingpressure set point (BP.SP) and the supply fan is on, buildingpressure control is initialized.

77serial numbers of the new actuator. Four individual numbersmake up each serial number and these can be programmed tomatch the serial number of the a

78is connected. (The outdoor CO2 sensor connection requiresinstallation of the controls expansion module [CEM].)The ComfortLink controls have the capa

79Table 66 — Indoor Air Quality ConfigurationIAQ Discrete Input Config (ConfigurationoIAQoAQ.CFoIQ.I.C) — This configuration is used to set the type o

8Table 3 — Fan Performance — 48P2,P3,P4,P5030 and 50P2,P3030 Units without Discharge Plenum*LEGEND*If calculating static pressure for a 48 Series unit

80IAQ Econo Override Pos (ConfigurationoIAQoAQ.SPoIQ.O.P) — This configuration is the position that the econo-mizer goes to when override is in effect

81If a humidifier using a proportional steam valve is selected,the Carrier actuator (Carrier Part No. HF23BJ050) must beadapted to the humidifier manu

82NOTE: This configuration does not typically need adjustment.It is configurable for the small number of jobs which mayrequire a custom solution or wo

83Dehumidification and Reheat Control — If a dehumidifica-tion mode is initiated, the rooftop will attempt to lowerhumidity as follows:• Economizer Co

84oCOOLoC.EXV. The condenser position will be providedas percent open.The Humidi-MiZer Bypass Modulating Valve (BypassEXV) position output can be fou

85The algorithm will calculate a Start Bias time in minutes us-ing the following equations:If (space temperature > occupied cooling set point) Star

8699, then the control will broadcast the internal time scheduleonce every 2 minutes.CCN Broadcast Acknowledger (B.ACK) — If this configu-ration is se

87Table 71 — Alert Limit ConfigurationRAT Low Alert Limit/Unocc (RA.L.U) — If the return-airtemperature is below the configurable unoccupied RAT LowAl

88reading can be adjusted ± 10° F to match the actual measuredtemperature.Limit Switch Trim (L.SW.T) — This variable is used to ad-just the limit swit

89Fan Status Switch — Off (SFS.L) — The fan status switchinput is set for normally open for off. If a field-supplied fanstatus switch is used that is

9Table 4 — Fan Performance — 48P2,P3,P4,P5035 and 50P2,P3035 Units without Discharge Plenum*LEGEND*If calculating static pressure for a 48 Series unit

90Table 74 — Display ConfigurationTable 75 — Supply Fan VFD Configuration*This default is model number dependent.Table 76 — Exhaust Fan VFD Configurat

91Table 78 — Remote Switch ConfigurationRemote Switch Config(ConfigurationoUNITo RM.CF)— This is the configuration that allows the user to assign dif-

92Day of Week (DAY) — This variable is the current dayof the week (Monday through Sunday).Year (YEAR) — This variable is the current year (for ex-ampl

93Table 80 — Time Clock MenuTROUBLESHOOTINGThe scrolling marquee display shows the actual operatingconditions of the unit while it is running. If ther

94If a more accurate check is required, unit must be powereddown and thermistor removed and checked at a known temper-ature (freezing point or boiling

95Table 82 — Humidi-MiZer® Service AnalysisPROBLEM CAUSE REMEDYSubcooling Mode Will Not ActivateCircuit B compressors unavailable Check alarm history

96Table 82 — Humidi-MiZer Service Analysis (cont)Transducer Troubleshooting — The electronic con-trol uses 2 suction pressure transducers to measure t

97Table 83 — Gas Heating Service AnalysisTable 84 — Electric Heat Service AnalysisPROBLEM CAUSE REMEDYBurners Will Not Ignite. Active alarm. Check act

98Table 85 — 10K Thermistor vs Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (F)TEMP(F)RESISTANCE(Ohms)–25 196,453–24 189,692–23 183,300–22 177,00

99Table 86 — 10K Thermistor vs Resistance (T55, T56, OAT, RAT, EDT, LAT Sensor) (C)Table 87 — 86K Thermistor vs Resistance (DTA1) TEMP(C)RESISTANCE(