Carrier WeatherExpert N9 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 — 48/50N 105 Nominal Ton Units Standard Supply Fan Data LEGENDBhp — Brake HorsepowerAIRFLOW(cfm)AV

100Table 72 — Cooling Service AnalysisLEGENDPROBLEM CAUSE REMEDYCompressor and Fan Will Not Start.Power failure. Check power source. Call power compan

101Table 73 — Humidi-MiZer® Service AnalysisPROBLEM CAUSE REMEDYSubcooling Mode Will Not ActivateCircuit B compressors unavailable Check alarm history

102Table 73 — Humidi-MiZer Service Analysis (cont)Transducer Troubleshooting — The electronic con-trol uses 2 suction and 2 discharge pressure transdu

103Table 74 — Gas Heating Service AnalysisTable 75 — Electric Heat Service AnalysisPROBLEM CAUSE REMEDYBurners Will Not Ignite. Active alarm. Check ac

104Table 76 — 10K Thermistor vs Resistance (T55, T56, T58, OAT, RAT, EDT, LAT Sensors) (F)TEMP(F)RESISTANCE(Ohms)–25 196,453–24 189,692–23 183,300–22

105Table 77 — 10K Thermistor vs Resistance (T55, T56, T58, OAT, RAT, EDT, LAT Sensor) (C)Table 78 — 86K Thermistor vs Resistance (DTA1, LT-A, LT-B)

106Table 79 — 5K Thermistor vs. Resistance (RTA1, ST-A1, ST-A2, ST-B1, ST-B2) (F)TEMP(F)RESISTANCE(Ohms)–25 98,010–24 94,707–23 91,522–22 88,449–21 85

107Table 80 — 5K Thermistor vs. Resistance (RTA1, ST-A1, ST-A2, ST-B1, ST-B2) (C)TEMP(C)RESISTANCE(Ohms)–32 100,260–31 94,165–30 88,480–29 83,170–28 7

108Table 81 — Suction Pressure Transducer (psig) vs. Voltage (SSP-A, SSP-B)PRESSURE(PSIG)VOLTAGEDROP (V) PRESSURE(PSIG)VOLTAGEDROP (V) PRESSURE(PSIG)V

109Table 82 — Liquid Pressure Transducer Discharge Pressure Transducer (psig) vs. VoltagePRESSURE(PSIG)VOLTAGEDROP (V)PRESSURE(PSIG)VOLTAGEDROP (V)PRE

11Table 6 — Fan Performance — 48/50N 105 Nominal Ton Units High-Static Supply Fan Data LEGENDBhp — Brake HorsepowerAIRFLOW(cfm)AVAILABLE

110Table 82 — Liquid Pressure Transducer Discharge Pressure Transducer (psig) vs. Voltage (cont)PRESSURE(PSIG)VOLTAGEDROP (V)PRESSURE(PSIG)VOLTAGEDROP

111YESFLASHING1 FLASH - INDOOR FAN DELAYMODIFIED (HEATING)2 FLASHES - OPENING OF LIMITSWITCH3 FLASHES - FLAME SENSORINDICATES FLAME WITHCLOSED GAS VAL

112Table 83 — Auto View of Run Status Display TableRun StatusVIEWEDT — Displays the current evapora-tor discharge air temperature during Cooling mod

113Cap Threshold Adding (Z.PLU) — This parameter is used inthe calculation of SMZ and is calculated as follows:Z.PLU = ConfigurationCOOLZ.GN * (10

114Low Temp Cap Override (L.TMP) — If the error is less thantwice Y.MIN, and the rate of change of error is less than–0.5F, then a mechanical stage

115Table 88 — CCN/Linkage Display TableTable 89 — Compressor Run Hours Display TableTable 90 — Compressor Starts Display TableTable 91 — Software Vers

116DIAGNOSTIC ALARM CODES AND POSSIBLECAUSEST048 (Ckt A, Oil Return Not Reliable with Only One CompAvailable)T049 (Ckt B, Oil Return Not Reliable with

117high-pressure switch trip, the upper horizontal portion of thecompressor operating envelope (see Fig. 22) is lowered 0.4 F(3 psig). The control wil

118Table 92 — Alert and Alarm CodesALARM OR ALERT NUMBERDESCRIPTION ACTION TAKEN BY CONTROL RESET METHODT048 CktA, Oil Return Not Reliable With Only O

119Table 92 — Alert and Alarm Codes (cont)ALARM OR ALERT NUMBERDESCRIPTION ACTION TAKEN BY CONTROL RESET METHODA180 Cir B EXV Control Board Comm Failu

12Table 7 — Fan Performance — 48/50N 120 Nominal Ton Units Standard Supply Fan Data LEGENDBhp — Brake HorsepowerAIRFLOW(cfm)AVAIL

120Table 92 — Alert and Alarm Codes (cont)T082 (Space Temperature Offset Sensor Failure) — Whenthis failure occurs, there is no offset available that

121T098 (Circuit A Liquid Thermistor Failure)T099 (Circuit B Liquid Thermistor Failure) — Failure ofthis sensor (Temper ature sREF.TLT.A, LT.B) will

122strike is tied to the circuit going off entirely, not reducingcapacity and recovering. Therefore it is possible that multipleP126 and P127 alerts m

123cause a complete system shut down when communication fail-ure occurs. Recovery is automatic. Reason for failure may bedue to incorrect wiring, powe

124SENSRRH.S) setting, and the measured level is below theconfigurable RH Low Alert Limit (ConfigurationIAQALLM R.RH.L) for 5 minutes, then the al

125turning the indoor fan on will increase pressure in the space.Recovery is automatic when the input is no longer on.A407 (Smoke Purge Emergency Mode

126ALRM) the unit will be instructed to shut down immediately.Software reset is automatic when input has been reset. Possiblecauses are under/over vol

127T701 (Staged Gas 1 Thermistor Failure)T702 (Staged Gas 2 Thermistor Failure)T703 (Staged Gas 3 Thermistor Failure) — If any of thestaged gas thermi

128Fig. 23 — 48/50N Typical Power Schematic (Nominal Ton 90-150 Units Shown)a48-8712

129Fig. 24 — 48/50N Main Base Board Input/Output Connections

13Table 8 — Fan Performance — 48/50N 120 Nominal Ton Units High-Static Supply Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)0.2 0.

130Fig. 25 — 48/50N RXB, EXB, CEM Input/Output Connections

131Fig. 26 — 48/50N EXV, SCB Input/Output Connectionsa48-8715

132Fig. 27 — 48/50N Typical Modulating Gas Heat Unit Control Wiring

133Fig. 28 — 48/50N Typical Electric Heat Unit Control Wiring

134Fig. 29 — 48/50N Typical Power Component Control Wiring

135CONTINUED ON GAS HEAT UNIT CONTROL WIRINGFig. 30 — 48/50N Typical Gas Heat Section Wiring (Nominal Ton 75-105, Low Heat Units)a48-8718

136CONTINUED ON GAS HEAT UNIT CONTROL WIRINGFig. 31 — 48/50N Typical Modulating Gas Heat Section Wiring (Nominal Ton 75-105, Low Heat Units)a48-8719

137Fig. 32 — 48/50N Component Arrangement Power Boxa48-8720

138Fig. 33 — 48/50N Component Arrangement Control Boxa48-8721

139LEGEND FOR Fig. 23-33ACCSY — AccessoryACC’Y — AccessoryACC FSS — Accessory Fan Status SwitchAN — AnalogAPS — Air Pressure SwitchBP — Building Press

14Table 9 — Fan Performance — 48/50N 130, 150 Nominal Ton Units Standard Supply Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE

140Table 93 — Main Control Board (MBB) Inputs and OutputsPOINT NAME POINT DESCRIPTION TYPE OF I/OI/O POINT NAMECONTROL BOARDCONNECTORPIN NO.UNITSINPUT

141Table 94 — Rooftop Control Board (RXB) Inputs and OutputsPOINT NAME POINT DESCRIPTION TYPE OF I/O I/O POINT NAMECONTROL BOARDCONNECTORPIN NO.INPUTS

142Table 95 — Economizer Control Board (EXB) Inputs and OutputsPOINT NAME POINT DESCRIPTION TYPE OF I/O I/O POINT NAMECONTROL BOARDCONNECTORPIN NO.INP

143ADDRESS DIPSWITCHES ALL ONRED LED-STATUSGREEN LED-LEN (LOCAL EQUIPMENT NETWORK)J2J1PWRJ4LENLENJ34-POSITIONDIP SWITCHPWR113107XDCR/THERM41J6J5741313

144Table 96 — Staged Gas Control Board (SCB) Inputs and OutputsTable 97 — Control Expansion Module (CEM) Inputs and OutputsCOMPRESSOR EXPANSION BOAR

145Table 98 — Compressor Expansion Board (CXB) Inputs and OutputsTable 99 — Expansion Valve Control Board A (EXV-A) Inputs and OutputsTable 100 — Expa

146Table 102 — Field Terminal Connections LEGENDBOARD NO. TERMINAL NO. DESCRIPTION TYPETB-1 - POWER CONNECTION OR DISCONNECT (in Power B

147Table 103 — IGC Board Inputs and OutputsCURRENT SENSOR BOARD (CSB) — This board moni-tors the status of the compressor by sensing the current flo

148board LED that is lit continuously or blinking at a rate of onceper second or faster indicates that the board should be replaced.Green LED — The bo

149Table 107 — VFD Terminal DesignationsRETURN FAN — The return fan power exhaust assemblyconsists of one belt-drive plenum fan. The return fan is a b

15Table 10 — Fan Performance — 48/50N 130, 150 Nominal Ton Units High-Static Supply Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE

150NETWORK OPTIONSREMOTECCN SITEAUTODIALGATEWAYNON CARRIER HVAC EQUIPMENTTERMINAL SYSTEMMANAGERTCUROOFTOP UNIT DAV AIRTERMINALTCUTCU DAV

151Table 108 — Thermistors and Unit Operation Control Pressure Transducers LEGENDSPACE CO2 SENSORS — The ComfortLink controls alsosuppo

152SERVICEService Access — All unit components can be reachedthrough clearly labeled hinged access doors. These doors areequipped with tiebacks.Each d

153NOTE: Disassembly of the top cover may be required underspecial service circumstances. It is very important that the ori-entation and position of t

154MODULATING GAS VALVEPRESSURETUBINGPRESSURESWITCHNOTE: Modulating Gas (Always Section #1)PRESSUREFITTINGFig. 46 — Modulating Gas Heata48-8705See Det

155RETURN-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

156SUPPLY FAN AND POWER EXHAUST MOTORPLATE — Adjust using a wrench on the adjusting bolts:1. Loosen holddown bolts. (See Fig. 52.)2. Turn the adjustin

157BELT INSTALLATION AND TENSIONING1. Turn off unit power.2. Adjust motor plate so belts can be installed withoutstretching over the grooves of the pu

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

1593. Start high pressure water sprayer and purge any soap orindustrial cleaners from sprayer before cleaning condens-er coils. Only clean potable wat

16Table 11 — Fan Performance — 48/50N 75-150 Nominal Ton Units Standard Return Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESS

160155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

161155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

162155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

163155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

164155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

165155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

166155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

167155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

168155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

169155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

17Table 12 — Fan Performance — 48/50N 75 Nominal Ton Units High-Static Return Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

170155145135125115105958575654060507090408040100120110OUTDOOR AIR TEMPERATURE (F)SATURATED DISCHARGE TEMPERATURE (F)REDUCE CHARGE IF ABOVEADD CHARGE I

171Gas System Adjustment (48N Only)TWO-STAGE GAS VALVE ADJUSTMENT — The gasvalve opens and closes in response to the unit control.When power is sup

172Filter Drier — Replace whenever the moisture/liquid indi-cator shows moisture in the system or when the system wasopened for service.Liquid Line Se

173must then be manually reset by power down and power up ofthe unit.LIMIT SWITCH THERMISTOR (Staged Gas UnitOnly) — The limit switch thermistor is a

174APPENDIX A — LOCAL DISPLAY TABLESMODE — RUN STATUSITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO.VIEW AUTO VIEW OF RUN STATUSHVAC ascii

175APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — RUN STATUS (cont)ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO.VFDS VFD INFORMATIONS.VF

176APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — SERVICE TESTITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO.TEST Service Test Mode ON/OFF

177APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — SERVICE TEST (cont)ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO.HEAT TEST HEATINGHT.ST

178APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — TEMPERATURESMODE — PRESSURESMODE — SETPOINTSITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUSAIR.T A

179APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — INPUTSITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUSGEN.I GENERAL INPUTSPWR.F Power Fault Input

18Table 13 — Fan Performance — 48/50N 90 Nominal Ton Units High-Static Return Fan DataAIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)0.20.40.6

180APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — OUTPUTSITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUSFANS FANSSF.BY Supply Fan Bypass Relay Off

181APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATIONITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO.UNIT UNIT CONFIGURATIONC.TYP Mach

182APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATION (cont)* Some defaults are model number dependent.ITEM EXPANSION RANGE UNITS CCN POINT

183APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATION (cont)ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO.ECON ECONOMIZER CONFIGURATI

184APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATION (cont)*The display text changes depending on the remote switch configuration (Configur

185APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATION (cont)ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO.IAQ INDOOR AIR QUALITY CFG.

186APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — CONFIGURATION (cont)* Model number dependent.ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO.IA

187APPENDIX A — LOCAL DISPLAY TABLES (cont)MODE — TIMECLOCKMODE — OPERATING MODESMODE — ALARMSITEM EXPANSION RANGE UNITS CNN POINT DEFAULTS PAGE NO.TI

188APPENDIX B — CCN TABLESAll N Series units with ComtfortLink controls have a portfor interface with the Carrier Comfort Network® (CCN) sys-tem. On T

189APPENDIX B — CCN TABLES (cont)STATUS DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSECONDIAGEconomizer Active ? No/Yes

19Table 14 — Fan Performance — 48/50N 105-150 Nominal Ton Units High-Static Return Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE

190APPENDIX B — CCN TABLES (cont)STATUS DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSHMZRHVAC Mode...: 16-cha

191APPENDIX B — CCN TABLES (cont)STATUS DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSUINPUTSPower Fault Input Normal/Al

192APPENDIX B — CCN TABLES (cont)STATUS DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSUOUTPUT2 HEATING Heat Relay

193APPENDIX B — CCN TABLES (cont)SET POINT TABLECONFIG TABLESSERVICE-CONFIG TABLESTABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTSET_PNT Occupied H

194APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTACTUATOR Econ 1 Out Ser Number 1 E

195APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTCOOL Enable Compressor A1 Disable/Ena

196APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTECON Economizer Installed ? No/Yes

197APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTHEAT Heating Control Type HEATTYP

198APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTSP__ Static Pressure Control Disable/

199APPENDIX B — CCN TABLES (cont)SERVICE-CONFIG TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULTUNIT Machine Control Type CTRLTYP

2CONTENTS (cont)Page• AIRFLOW CONTROL DURING FIRE/SMOKE MODES• SMOKE CONTROL CONFIGURATIONIndoor Air Quality Control . . . . . . . . . . . . . . . . .

20Table 15 — Fan Performance — 48/50N 75 Nominal Ton Units Standard Power Exhaust Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE (in

200APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLESTABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSACDTRSLT Calc. Cir A Subcool Temp

201APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSCOMPRSRA Compressor A1 Relay

202APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSDMANDLIM Active Demand Limit

203APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSEC_DIAG Economizer Active ?

204APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSHUMIDITY Space Relative Humid

205APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSPRESBLDG Building Pressure

206APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSSUMZ Cooling Control Point

207APPENDIX B — CCN TABLES (cont)MAINTENANCE DISPLAY TABLES (cont)TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUSTESTHEAT Requested Heat Stage

208APPENDIX C — UNIT STAGING TABLESTIME SCHEDULE CONFIG TABLEAllowable Entries: Day not selected = 0 Day selected = 1UNIT SIZE N STAGING SEQUENCE WITH

209APPENDIX C — UNIT STAGING TABLESUNIT SIZE P, Q STAGING SEQUENCE (90 AND 105 TON NOMINAL CAPACITY)*Minimum load valve (MLV). MLV is enabled on Circu

21Table 16 — Fan Performance — 48/50N 90-150 Nominal Ton Units Standard Power Exhaust Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE (in

210 APPENDIX C — UNIT STAGING TABLESUNIT SIZE R, S, T STAGING SEQUENCE WITH DIGITAL COMPRESSOR (120-150 TON NOMINAL CAPACITY)STAGESEQUENCE012345678COM

211APPENDIX D — VFD INFORMATIONOn units equipped with optional supply fan and/or exhaustfan VFDs, the fan speed is controlled by a 3-phase VFD. Thesup

212APPENDIX D — VFD INFORMATION (cont)Table B — VFD Parameters Configured by Carrier Assistant* 41 for Supply Fan Motor VFD, 42 for Exhaust Fan Motor

213APPENDIX D — VFD INFORMATION (cont)Table E — VFD ComfortLink Control VariablesTable F — VFD ComfortLink Command VariablesVFD Operation — The VFD ke

214APPENDIX D — VFD INFORMATION (cont)START-UP WITH CARRIER ASSISTANT — Initial start-up has been performed at the factory. If a VFD has beenreplaced

215APPENDIX D — VFD INFORMATION (cont)STANDARD DISPLAY MODE — Use the standard displaymode to read information on the drive status and operate thedriv

216APPENDIX D — VFD INFORMATION (cont)Upload All Parameters — To upload and store parameters inthe control panel from the VFD, perform the followingpr

217APPENDIX 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

218APPENDIX 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.

219APPENDIX D — VFD INFORMATION (cont)Table G — Fault CodesFAULT CODEFAULT NAME IN PANELDESCRIPTION AND RECOMMENDED CORRECTIVE ACTION1 OVERCURRENTOutp

22Table 17 — Fan Performance — 4/508N 75-105 Nominal Ton Units High-Static Power Exhaust Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESS

220APPENDIX 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

221APPENDIX E — MODE SELECTION PROCESSThe following section is to be used in conjunction withFig. 7 on page 43. To help determine why the unit control

222HVAC mode: ("Off ")— The unit is off and no operating modes are active.HVAC mode: ("Tempering Vent ")— The eco

223APPENDIX F — BACNET COMMUNICATION OPTIONThe following section is used to configure the UPC Opencontroller. The UPC Open controller is mounted in a

224APPENDIX F — BACNET COMMUNICATION OPTION (cont)Configuring the BAS Port for BACnet MS/TP — Use the same baud rate and communication settingsfor all

225APPENDIX F — BACNET COMMUNICATION OPTION (cont)To install a BT485 terminator, push the BT485 terminatoron to the BT485 connector located near the B

226APPENDIX F — BACNET COMMUNICATION OPTION (cont)Table M — Open System Wiring Specifications and Recommended Vendors LEGE

227APPENDIX F — BACNET COMMUNICATION OPTION (cont)Configuring the UPC Open Controller's Prop-erties — The UPC Open Element Comm Stat and Com-for

228APPENDIX F — BACNET COMMUNICATION OPTION (cont)NETWORK POINTS LISTSee legend on page 233.POINT DESCRIPTIONCCN POINT NAMEREAD/WRITEUNITSDEFAULTVALUE

229APPENDIX F — BACNET COMMUNICATION OPTION (cont)NETWORK POINTS LIST (cont)See legend on page 233.POINT DESCRIPTIONCCN POINT NAMEREAD/WRITEUNITSDEFAU

23Table 18 — Fan Performance — 48/50N 120-150 Nominal Ton Units High-Static Power Exhaust Fan Data AIRFLOW(cfm)AVAILABLE EXTERNAL STATIC PRESSURE (in.

230APPENDIX F — BACNET COMMUNICATION OPTION (cont)NETWORK POINTS LIST (cont)See legend on page 233.POINT DESCRIPTION CCN POINT NAMEREAD/WRITEUNITSDEFA

231APPENDIX F — BACNET COMMUNICATION OPTION (cont)NETWORK POINTS LIST (cont)See legend on page 233.POINT DESCRIPTION CCN POINT NAMEREAD/WRITEUNITSDEFA

232APPENDIX F — BACNET COMMUNICATION OPTION (cont)NETWORK POINTS LIST (cont)See legend on page 233.POINT DESCRIPTION CCN POINT NAMEREAD/WRITEUNITSDEFA

233APPENDIX F — BACNET COMMUNICATION OPTION (cont)NETWORK POINTS LIST (cont) LEGENDPOINT DESCRIPTION CCN POINT NAMEREAD/

234APPENDIX G — OPTIONAL MOTORMASTER® V CONTROLGENERALThis appendix contains instructions for the start-up and ser-vice of the optional Motormaster V

235APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)Drive Programming — Table Q shows all program pa-rameters for each of the operating modes. Refer

236APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)Table Q — Program Parameters for the Operating ModeLEGENDPARAMETERS DESCRIPTION MODE 1 MODE 2 MO

237APPENDIX G — OPTIONAL MOTORMASTER® V CONTROL (cont)EPM Chip — The drive uses a electronic programmingmodule (EPM) chip to store the program paramet

24Table 19 — Component Pressure Drops (in. wg)Sizes N, P, Q (75-105 Ton Nominal Capacity) LEGENDCOMPONENTAIRFLOW (cfm)15,000 19,000 2

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 SETTINGHH.CF HYDRONIC HEAT CONFIGS HW.P Hydronic Ctl.Prop. Gain 1HW

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

CL-5CONTROLS SET POINT AND CONFIGURATION LOG (cont)ITEM EXPANSION RANGE DEFAULT SETTINGBP (CONT)DMD.L DEMAND LIMIT CONFIG. DMD.LDM.L.S Demand Limit

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

CL-7CONTROLS SET POINT AND CONFIGURATION LOG (cont)*Model number dependent.ITEM EXPANSION RANGE DEFAULT SETTINGIAQ (CONT)DISP DISPLAY CONFIGURATION 

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

25Table 20 — Component Pressure Drops (in. wg)Sizes R, S, T (120-150 Ton Nominal Capacity) LEGENDCOMPONENTAIRFLOW (cfm)24,000 28,000 32,0

26Table 21 — Supply Fan Motor Limitations LEGEND NOTES:1. Extensive motor and electrical testing on the Carrier units hasensured that

27CONTROLS QUICK STARTThe following section will provide a quick user guide to set-ting up and configuring the N Series units with ComfortLinkcontrols

28ConfigurationECONEC.MN should always be set forthe minimum damper position.If the unit is equipped with an outdoor air flow station, thefollowing

29(SOFT KEY 2) to save the configuration and return to theClock Set menu.8. Press EXIT (SOFT KEY 1) twice to return to the mainmenu.Programming Operat

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

30Table 23 — Service TestITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUSTEST Service Test Mode ON/OFF MAN_CTRLSTOP Local Machine Disable YES/NO UNIT

31Table 23 — Service Test (cont)ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUSHEAT TEST HEATINGHT.ST Requested Heat Stage 0-15 HTST_TSTHT.1 Hea

32Actuators — In the AC.T.C sub-menu, it will be possibleto control and calibrate actuators. Calibration is a mode inwhich the actuator moves from 0%

33• Service TestCOOLRHV (Humidi-MiZer 3-WayValve). On Humidi-MiZer equipped units, this itemallows the user to switch the reheat valve from ON toOFF

34For each auto-component test, the following information isgrouped in one screen: test status, component status, and valuesof response parameters.Aut

35If SP.AV is verified to change properly at 50% and 100%capacity, then DS.ST= PASS, otherwise DS.ST=FAIL.EXV Auto-Component Test — The EXV auto-com-p

363. Stage all A and B circuit compressors ON.4. Wait 5 minutes.5. Calculate CHG.A (0 lb indicates proper charge, 0.5 lb in-dicates 0.5 lb of over cha

37Minimum Load Valve (MLV) Auto-ComponentTest — Minimum load valve is also referred to as hot gas by-pass valve (HGBV). The hot gas bypass auto-compon

38After letting the power exhaust run and stabilize for 5 min-utes, the control will verify E.PWR has increased and BP iswithin BPSP ± AC_PE_DB. If E

39Setting EC.TS=ON will perform the following:1. Command S.VFD to STATPMIN.2. Open E.POS to 100% and let run 5 minutes.3. Verify SAT=OAT ± AC_EC_DB.4.

4A scheduling function, programmed by the user, controlsthe unit occupied/unoccupied schedule. Up to 8 differentschedules can be programmed. The contr

40In either case, it will be necessary to install a controls expan-sion module (CEM). The control interfaces to a switch input atTB202-10 and TB202-11

41NOTE: If D.F.ON is configured below DAQ.H, the unit is inoccupied mode, and the fan was off, then DAQ rose aboveD.F.ON and the fan came on, the econ

426. Emergency Stop, which is forced over the CCN throughthe Emergency Stop Variable (EMSTOP).(“CCN Emergency Stop”)7. Start-up Delay.(“Startup Delay

43System Mode =OFF?Inputs -> FIRE ->FSD in alarm?HVAC Mode = OFF(Fire Shutdown)HVAC Mode = OFF(Disabled)Unit not in factorytest AND fire-smokec

44HVAC Mode — FREEZESTAT TRIP (25) — If the freeze-stat trips, the unit enters the Freezestat Trip HVAC mode. Thesupply fan will run, the hydronic hea

45ConfigurationSPSP.RS = 1 (Static Pressure Reset us-ing 4-20ma sensor)ConfigurationSPSP.RS = 4 (Static Pressure Reset us-ing VFD Control)Configur

46during the occupied state. If AUX.R is set to 3, the auxiliary re-lay will energize when the supply fan is energized (and, ifequipped with a VFD, th

47COOLING CONFIGURATION — Relevant configurations formechanical cooling are located at the local display underConfigurationCOOL. See Table 29.Enable

48compressor will be controlled by the compressor staging rou-tine and SUMZ Cooling Algorithm.A1 Min Digital Capacity (MC.A1) — This configuration de-

49Table 29 — Cooling ConfigurationIf (rate after) is less than (rate prior minus 1.25), alarmA140 is generated. This alarm will disable mechanical coo

5force by selecting the point that is forced with the ENTER keyand then pressing both arrow keys simultaneously.Depending on the unit model, factory-i

50Boards are used to help detect a High Pressure Switch trip. Set-ting this configuration to NO disables this additional HighPressure switch trip dete

51Table 30 — Cool/Heat Set Point Offsets ConfigurationOperating modes are under Operating ModesMODE.Cool Mode Evaluation Logic — The first thing the

52• The control will utilize the SumZ cooling algorithm andcontrol cooling to a supply air set point. See the sectionfor the SumZ Cooling Algorithm se

53Table 32 — Run Status Cool DisplayPull Down Cap Override (PULL) — If the error from setpoint is above 4F, and the rate of change is less than –1

54SumZ Operation — The SumZ algorithm is an adaptive PIDstyle of control. The PID (proportional, integral, derivative) isprogrammed within the control

55remove a cooling stage and open up the economizer further tomake up the difference.Mechanical Cooling Lockout (ConfigurationCOOLMC.LO) — This conf

56There are up to four outputs provided to control headpressure:OutputsFANSCDF.1 — Condenser Fan Output 1OutputsFANSCDF.2 — Condenser Fan Output 2

57 75 Ton Standard EfficiencyCircuit BContactor OFM(s)CoilsSoftware Board Conrolled ControlledA CONDFAN1 MBB Rly 6 OFC1 OFM1Comp A1 or A2 ONB CONDFAN2

5890-105 Ton Standard Efficiency (identical to 75 Ton High Efficiency)Circuit BContactor OFM(s)CoilsSoftware Board Conrolled ControlledA CONDFAN1 MBB

59Circuit BCoils120 Ton Standard Efficiency (identical to 75 Ton High Efficiency)Contactor OFM(s)Software Board Conrolled ControlledA CONDFAN1 MBB Rly

6Accessory Installation — Check to make sure that allaccessories including space thermostats and sensors have beeninstalled and wired as required by t

60150 Ton Standard EfficiencyCircuit BContactor OFM(s)CoilsSoftware Board Conrolled ControlledA CONDFAN1 MBB Rly 6 OFC1 OFM2Common CONDFAN2 MBB Rly 5

61When a condenser fan output is common to both refrigera-tion circuits, in other words when the fan(s) will affect both cir-cuit A and circuit B, the

62Table 34 — Heating Configuration*Some defaults are model number dependent. NOTE: If the user does not relocate this sensor for the 2-stageelectric o

63Demand 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

64Hydronic Heating LogicIf the HVAC mode is LOW HEAT:• The control will command the supply fan on• The control will modulate the hot water or steam co

65Table 37 — Staged Heat Configuration*Some configurations are model number dependent.St.Ht DB Min.dF/PID Rate (M.R.DB) — This configurationis a dead

66the modulating gas section capacity is a function of the capaci-ty desired, the available heat staging patterns configured withheat stage type (HT.S

67Table 42 — Modulating Gas Heat Control Steps (HT.ST = 3)* ON when OutputsHEATH1.CP > 54%, OFF when OutputsHEATH1.CP < 46%.The electric hea

68The IGC boards only control the first stage of gas heat oneach gas valve. The second stages are controlled directly fromthe MBB board for staged gas

69TEMPERING MODE — In a vent or cooling mode, theeconomizer at minimum position may send extremely coldoutside air down the ductwork of the building.

7Table 2 — Navigator Menu Display StructureRUNSTATUSSERVICETESTTEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATIONTIMECLOCKOPERATINGMODESALA

70VFD Minimum Speed (SP.MN) — This is the minimumspeed for the supply fan VFD. Typically the value is chosen tomaintain a minimum level of ventilation

71STATIC PRESSURE RESETCCN Linkage — The ComfortLink controls supports the useof static pressure reset. For static pressure reset to occur, theunit mu

72Fan Status MonitoringGENERAL — The N Series ComfortLink controls offer thecapability to detect a failed supply fan through either a ductstatic pre

732 = Schedule — Filter configuration for either main or post fil-ter can be set to 2 (Schedule). In this mode the filter status isbased on a schedule

74The control shall test for a mechanically disconnected damperif all the following conditions are true:1. An economizer is installed.2. The supply fa

75It shall be possible to manually start the self-test:• In Navigator display, this test shall be located at ServiceTestAC.DTEC.TS.• Running the tes

76before trusting the SAT reading, and has been reused for Title24 purposes.Economizer Deadband Temp (AC.EC) — The alloweddeadband between measured

77Table 54 — Economizer Configuration TableITEM EXPANSION RANGE UNITS CCN POINT DEFAULTEC.EN Economizer Installed? Yes/No ECON_ENA YesEC.MN Economizer

78Economizer Changeover Select — The control is capable ofperforming any one of the following changeover types in addi-tion to both the dry bulb locko

79Control Angle Alarm Configuration — The economizer ac-tuator learns what its end stops are though a calibration at thefactory. Field-installed actua

8Table 3 — Fan Performance — 48/50N 75-90 Nominal Ton Units Standard Supply Fan Data LEGENDBhp — Brake HorsepowerAIRFLOW(cfm)AVA

80Table 55 — Economizer Run Status TableECONOMIZER DIAGNOSTIC HELP — Because there areso many conditions which might disable the economizer frombeing

81Table 56 — Building Pressure Control Table* Some configurations are model number dependent.VFD Maximum Speed/Pos. (BP.MX) — For BP.CF = 1 and2, thi

82(PressuresAIR.PBP) rises above the building pressure setpoint (BP.SP) and the supply fan is on, then building pressurecontrol is initialized. Ther

83The configurable fire speed override for exhaust VFD/actuatoris in ConfigurationBPB.V.ABP.FS.The exhaust fan VFD’s commanded speed can be found i

84off) only during the occupied period (CV operation withautomatic fan).• IQ.A.F = 2 (Fan On Occupied/Unoccupied) — IAQdemand will always override nor

85Table 57 — Indoor Air Quality ConfigurationIAQ Low Reference (ConfigurationIAQAQ.S.RIQ.R.L) — This is the reference that will be used with a tono

86When the outdoor air cfm sensor is enabled, the EconomizerMin.Position (ConfigurationIAQDCV.CEC.MN) andthe IAQ Demand Vent Min.Pos (Configuration

87Table 58 — Humidity ConfigurationTable 59 — Related Humidity PointsDehumidification and Reheat — The Dehumidifi-cation function will override comfor

88OPERATION — Dehumidification and reheat can only occurif the unit is equipped with either staged gas or hydronic heat.Dehumidification without rehea

89Vent Reheat Set Point Select (D.V.CF) — This configurationdetermines how the vent reheat set point is selected. This setpoint becomes the supply air

9Table 4 — Fan Performance — 48/50N 75-90 Nominal Ton Units High-Static Supply Fan Data LEGENDBhp — Brake HorsepowerAIRFLOW(cfm)AVAILABLE

90required for ASHRAE (American Society of Heating, Refrig-erating, and Air-Conditioning Engineers) 90.1 compliance. Aspace sensor is required for non

91The algorithm will calculate a Start Bias time in minutes us-ing the following equations:If (space temperature > occupied cooling set point) Star

92EDT High Alert Limit/Occ (SA.H.O) — If the space temper-ature is above the configurable occupied EDT High Alert Limit(SA.H.O), then Alert 303 will b

93OARH Low Alert Limit (O.RH.L) — If the unit is config-ured to use an outdoor air relative humidity sensor (Configura-tionECONORH.S) and the measur

94Table 63 — Sensor Trim ConfigurationTable 64 — Switch Logic ConfigurationPost Filter Status Input - Clean (PFT.L) — The filter statusinput for clean

95Password Enable (PAS.E) — This variable enables or dis-ables the use of a password. The password is used to restrictuse of the control to change con

96Table 67 — Exhaust Fan VFD Configuration*This default is model number dependent.Table 68 — Optional VFD Power Exhaust (PE) Motor Limitations (FLA)Po

97Table 70 — Remote Switch Logic ConfigurationHot Gas Bypass — The ComfortLink control systemsupports the use of an optional minimum load hot gas byp

98Table 71 — Time Clock MenuFRIDAY IN PERIOD (PER.XDAYSFRI) — This vari-able is used to include or remove Friday from the schedule.Each period is as

99DAYLIGHT SAVINGS STOP (DS.SP) — This submenu con-figures the end date and time for daylight savings.Daylight Savings Stop Month (DS.SPSP.MN) — This