Page 1: Table Of Contents
Economizer Configurations ....27 Carrier Comfort Network® (CCN) ....93 Indoor Air Quality Configurations .
Page 2: Safety Considerations
Service Analysis ......103 Restart Procedure ......103 WARNING Humidi-MiZer®...
Page 3: General
L´installation et l´entretien doivent être effectués par un in- cal display using the supplied Navigator™ device or through the stallateur ou une entreprise d´entretien qualifié, ou le four- Carrier Comfort Network (CCN) using ComfortVIEW™ soft- ® nisseur de gaz.
Page 4: Conventions Used In This Manual
The expanded description is shown in the local display tables but will not be shown with the path names in text. Navigator™ Display The CCN (Carrier Comfort Network ) point names are also ® The hand-held Navigator display is used with the 48/50N Se- cross-referenced in the local display tables (Appendix A) for ries units.
Page 5: System Pilot™ Interface
System Pilot™ Interface The System Pilot interface (33PILOT-01) is a component of the Carrier 3V™ system and can serve as a CCN user-interface and configuration tool. Additionally, the System Pilot interface can serve as a wall- mounted temperature sensor for space temperature measure- ment.
Page 6 Table 2 — Navigator Menu Display Structure SERVICE TIME OPERATING TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION ALARMS STATUS TEST CLOCK MODES Auto View of Service Test Mode Air Pressures Occupied Heat General Inputs Fans Unit Configuration Time of Day System Currently Run Status (TEST)
Page 7: Unit Preparation
START-UP Controls Use the following steps for the controls: IMPORTANT: Do not attempt to start unit, even momentar- ily, until all items on the Start-Up Checklist (at the back of IMPORTANT: The unit is shipped with the unit control dis- this book) and the following steps have been completed.
Page 8 Table 3 — Fan Performance — 48/50N 75-90 Nominal Ton Units Standard Supply Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 15,000 3.74 4.22 4.71 5.22 5.73 18,000 5.75 6.30 6.87 7.45 8.04 20,000 7.45 8.06 8.68 9.31 1017 9.95 22,000...
Page 9 Table 4 — Fan Performance — 48/50N 75-90 Nominal Ton Units High-Static Supply Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 15,000 2.56 3.34 4.19 5.09 6.04 18,000 3.68 4.50 5.38 6.30 7.27 20,000 4.59 5.45 6.34 7.29 8.26 22,000 5.64...
Page 10 Table 5 — Fan Performance — 48/50N 105 Nominal Ton Units Standard Supply Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 21,000 8.74 9.38 1019 10.03 1041 10.70 1063 11.37 25,000 1132 13.69 1151 14.44 1171 15.20 1190 15.97 1209 16.75...
Page 11 Table 6 — Fan Performance — 48/50N 105 Nominal Ton Units High-Static Supply Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 21,000 4.97 5.77 6.61 7.49 8.41 25,000 6.95 7.83 8.75 9.69 10.67 27,000 8.54 9.47 10.43 11.42 12.44 29,000 10.35...
Page 12 Table 7 — Fan Performance — 48/50N 120 Nominal Ton Units Standard Supply Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 24,000 8.13 8.86 9.61 10.37 11.14 28,000 12.01 12.85 13.70 14.56 15.43 32,000 16.95 1008 17.89 1026 18.85 1043 19.81...
Page 13 Table 8 — Fan Performance — 48/50N 120 Nominal Ton Units High-Static Supply Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 24,000 4.78 5.82 6.86 7.92 8.98 28,000 6.84 7.99 9.14 10.30 11.48 32,000 8.07 9.26 10.47 11.69 12.91 34,000 10.94...
Page 14 Table 9 — Fan Performance — 48/50N 130, 150 Nominal Ton Units Standard Supply Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 26,000 10.40 11.19 12.00 12.82 13.65 30,000 15.00 15.90 16.81 1005 17.73 1022 18.67 34,000 1060 20.74 1076 21.75...
Page 15 Table 10 — Fan Performance — 48/50N 130, 150 Nominal Ton Units High-Static Supply Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 26,000 6.23 7.34 8.46 9.60 10.73 30,000 8.75 9.98 11.22 12.46 13.71 34,000 10.24 11.53 12.82 14.11 15.42 36,000...
Page 16 Table 11 — Fan Performance — 48/50N 75-150 Nominal Ton Units Standard Return Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 15,000 2.09 2.54 3.02 3.52 4.04 18,000 3.38 3.91 4.46 5.03 5.62 21,000 5.15 5.76 6.38 7.03 7.69 24,000 7.49...
Page 17 Table 12 — Fan Performance — 48/50N 75 Nominal Ton Units High-Static Return Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 15,000 1.50 1.98 2.50 3.04 3.61 18,000 2.36 2.91 3.50 4.11 4.75 21,000 3.52 4.15 4.81 5.50 6.21 24,000 5.03...
Page 18 Table 13 — Fan Performance — 48/50N 90 Nominal Ton Units High-Static Return Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 15,000 1.19 1.69 2.23 2.80 3.41 18,000 1.82 2.38 2.99 3.63 4.31 21,000 2.65 3.30 3.97 4.69 5.43 24,000 3.75...
Page 19 Table 14 — Fan Performance — 48/50N 105-150 Nominal Ton Units High-Static Return Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 24,000 2.40 3.15 3.96 4.82 5.73 28,000 3.51 4.36 5.25 6.21 7.20 30,000 4.19 5.08 6.03 7.02 8.06 32,000 4.95...
Page 20 Table 15 — Fan Performance — 48/50N 75 Nominal Ton Units Standard Power Exhaust Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 5,000 0.39 0.58 0.77 0.96 1.14 8,000 1.03 1.39 1.72 2.04 2.35 10,000 1.72 2.21 2.66 3.08 3.49 12,000...
Page 21 Table 16 — Fan Performance — 48/50N 90-150 Nominal Ton Units Standard Power Exhaust Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 5,000 0.34 0.55 0.76 0.98 1.21 7,000 0.66 0.95 1.24 1.53 1.83 9,000 1.17 1.54 1.91 2.28 2.65 11,000...
Page 22 Table 17 — Fan Performance — 48/50N 75-105 Nominal Ton Units High-Static Power Exhaust Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 15,000 1.91 3.01 4.17 5.43 6.75 18,000 2.74 4.03 5.36 6.75 8.22 21,000 3.82 5.30 6.82 8.38 9.99 24,000...
Page 23 Table 18 — Fan Performance — 48/50N 120-150 Nominal Ton Units High-Static Power Exhaust Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 24,000 3.13 5.10 6.96 8.78 10.57 28,000 4.07 6.47 8.71 10.87 13.00 30,000 4.60 7.22 9.65 12.01 14.31 32,000...
Page 24 Table 19 — Component Pressure Drops (in. wg) Sizes N, P, Q (75-105 Ton Nominal Capacity) AIRFLOW (cfm) COMPONENT 15,000 19,000 23,000 27,000 31,000 35,000 39,000 43,000 47,000 52,000 High-Capacity Evaporator Coil (75-90) 0.05 0.10 0.14 0.18 0.22 0.26 0.29 0.32 0.34 0.37...
Page 25 Table 20 — Component Pressure Drops (in. wg) Sizes R, S, T (120-150 Ton Nominal Capacity) AIRFLOW (cfm) COMPONENT 24,000 28,000 32,000 36,000 40,000 44,000 48,000 52,000 56,000 60,000 High-Capacity Evaporator Coil (120) 0.10 0.13 0.16 0.19 0.22 0.25 0.28 0.31 0.33 0.36...
Page 26 110.7 95.4 LEGEND NOTES: 1. Extensive motor and electrical testing on the Carrier units has Bhp — Brake Horsepower ensured that the full horsepower range of the motor can be utilized BkW — Brake Kilowatts with confidence. Using fan motors up to the horsepower ratings ODP —...
Page 27: Controls Quick Start
CONTROLS QUICK START Multi-Stage CV and SAV Units with Mechanical Thermostat The following section will provide a quick user guide to setting To configure the unit, perform the following: up and configuring the N Series units with ComfortLink con- trols. See Basic Control Usage section on starting on page 4 1.
Page 28: Indoor Air Quality Configurations
Configuration  ECON  EC.MN should always be set for the FT.CF Fan Track Learn Enable (see note below) minimum damper position. FT.TM Fan Track Learn Rate (see note below, not used If the unit is equipped with an outdoor airflow station, the follow- when Fan Track Learning is disabled) ing points in Configuration ...
Page 29: Programming Operating Schedules
6. Use the UP or DOWN keys to highlight SET DATE and SERVICE TEST press SEL (SOFT KEY 2). Use the UP or DOWN keys to General change the day, month, and year. Press OK (SOFT KEY 2) The units are equipped with a Service Test feature, which is in- to save the configuration and return to the Clock Set menu.
Page 30 Table 23 — Service Test ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS TEST Service Test Mode Off/On MAN_CTRL STOP Local Machine Disable No/Yes UNITSTOP S.STP Soft Stop Request No/Yes SOFTSTOP FAN.F Supply Fan Request No/Yes SFANFORC INDP TEST INDEPENDENT OUTPUTS HUM.R Humidifier Relay Off/On...
Page 31 Table 23 — Service Test (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS EXVS (cont) TEST CIRCUIT EXVS B2.EX Circuit B EXV 2 Position 0-100 B_X2_TST A1.CL Cir A EXV 1 Calibrate Off/On A_X1_CAL A2.CL Cir A EXV 2 Calibrate Off/On A_X2_CAL B1.CL...
Page 32 Table 23 — Service Test (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS EX.TS EXVS AUTO-COMPONENT TEST EX.TR Run EXVs Auto-Test No/Yes AC_EX XT.ST Test Status & Timer DD_TEXT SH.SP EXV Superheat Ctrl SP 5-40 SH_SP_CT SH.A1 Cir A EXV1 Superheat Tmp –100-200 SH_A1 SH.A2...
Page 33: Actuators
Test  COOL  B.EXV). To view the actual valve position at any Actuators time, user Outputs menu (Out- In the AC.T.C submenu, it will be possible to control and cali- puts  COOL  B.EXV). brate actuators. Calibration is a mode in which the actuator Service Test ...
Page 34: Heating
• Service Test  COOL  RHV (Humidi-MiZer 3-Way • Service Test  HEAT  H1.CP (Modulating Heat Capaci- Valve). On Humidi-MiZer equipped units, this item allows ty). If configured for modulating gas or SCR electric heat, the user to switch the reheat valve from ON to OFF and the user will be able to manually control the capacity of the vice versa.
Page 35: Digital Scroll Compressor (A1) Auto-Component Test
2. No compressors are on or requested on. Passed Comp A3 Auto-Test Result 3. All compressors are available for staging. Passed Comp A4 Auto-Test Result The testing screen will display the following: Passed Comp B1 Auto-Test Result Passed Comp B2 Auto-Test Result CP.TS ON Run Compressor Auto-Test Passed...
Page 36: Refrigerant Charge Auto-Test
4. Let compressors run 5 minutes. XA1S Running EXV A1 Auto-Test Status 5. Prompt user to read charging charts. XA2S Running EXV A2 Auto-Test Status 6. Let compressors run 5 minutes. XB1S Running EXV B1 Auto-Test Status 7. End test. XB2S Running EXV B2 Auto-Test Status...
Page 37: Third Party Control
After letting the supply fan run and stabilize for 5 minutes, the Supply Air Reset control will verify S.PWR has increased and SP (if enabled) With the installation of the control expansion module (CEM), has increased. the ComfortLink controls are capable of accepting a 4 to 20 If both S.PWR and SP (if enabled) have increased, mA signal to reset the supply-air temperature up to a maximum SF.ST=PASS, otherwise SF.ST=FAIL.
Page 38 IAQ.L to OPEN means that when the switch is open, the input Options 2, 3, and 4 are dedicated for third party control. will read LOW. When the switch is closed, the input will read IQ.A.C = 2 (IAQ Analog Input Used to Override) HIGH.
Page 39: Controls Operation
as 0 ohms = 0% and 10,000 ohms = 100%, thereby giving com- Linkage Active CCN (LINK) plete range control of the effective minimum position. This variable displays if a linkage master in a zoning system NOTE: For complete economizer control, the user can make has established “linkage”...
Page 40 HVAC Mode — DISABLED (1) the status of the outside air. The unit can be configured for out- side air dry bulb changeover, differential dry bulb changeover, The unit is shut down due to a command software disable outside air enthalpy changeover, differential enthalpy change- through the scrolling marquee, a CCN emergency stop com- over, or a custom arrangement of enthalpy/dew point and dry mand, a service test end, or a...
Page 41 Unit not in factory System Mode = test AND fire-smoke OFF? control mode is Fire- alarming? System Smoke Mode Control Inputs -> FIRE -> HVAC Mode = OFF Inputs -> FIRE -> Inputs -> FIRE -> FSD in alarm? (Disabled) PRES in alarm? EVAC in alarm? HVAC Mode = OFF...
Page 42: Unit Configuration
Configuration  SP  SP.RS = 1 (Static Pressure Reset using Unit Configuration 4-20 mA sensor) There is a submenu under the Configuration mode of the local Configuration  UNIT  SENS  RRH.S = Enable (Return display entitled UNIT. This submenu contains an assortment of Air Relative Humidity Sensor Enable) items that most of which are relative to other particular sub- sections of this control manual.
Page 43 Table 25 — Unit Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULTS UNIT UNIT CONFIGURATION C.TYP Machine Control Type 1 to 4 CTRLTYPE SIZE Unit Size (75-150) 75 to 150 UNITSIZE Fan Mode (0=Auto, 1=Cont) 0 to 1 FAN_MODE FN.MD Remote Switch Config 0 to 3 RMTINCFG...
Page 44: Cooling Control
Altitude..in feet: (ALTI) SETTING UP THE SYSTEM As the control does not include a barometric pressure sensor to The control type (Configuration  UNIT  C.TYP) deter- thoroughly define the calculation of enthalpy and cfm, the con- mines the selection of the type of cooling control, as well as the trol does include an altitude parameter, which will serve to set technique for selecting a cooling mode.
Page 45 Unit Size (SIZE) Enable Compressor B2 (B2.EN) There are 6 unit sizes (tons) for the N Series control. Make sure This configuration is used to disable the B2 compressor in case this configuration matches the size called out by the model of failure for size 75 to 150-ton units.
Page 46 Table 27 — Supply Air Reset Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT EDT.R EVAP.DISCHRGE TEMP RESET RS.CF EDT Reset Configuration 0 to 3 EDRSTCFG RTIO Reset Ratio 0 to 10 RTIO LIMT Reset Limit 0 to 20 deltaF LIMT RES.S EDT 4-20 ma Reset Input...
Page 47 capacity reduction. This ramped reduction is only imposed on Comp. Cir. Exv. Min Pos% (EX.MN) a decrease in digital scroll capacity. An increase in capacity This configuration sets the allowable commanded EXV mini- will continue to follow the values defined by Configuration  mum position.
Page 48 Table 28 — Cooling Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT COOL COOLING CONFIGURATION A1.EN Enable Compressor A1 Disable/Enable CMPA1ENA Enable A2.EN Enable Compressor A2 Disable/Enable CMPA2ENA Enable A3.EN Enable Compressor A3 Disable/Enable CMPA3ENA Enable A4.EN Enable Compressor A4 Disable/Enable CMPA4ENA Enable...
Page 49 Table 28 — Cooling Configuration (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT EX.SL EXV Init Pos Slope –100 to 100 EXV_SLP –0.4 EX.IN EXV Init Pos Intercept –200 to 200 EXV_INT EX.SM EXV Smoothing Algorithm 0 to 1 EXV_SMAL EX.EP SH Error Exponent 1 to 1.5...
Page 50 VAV Cool Mode Selection during the Unoccupied Period Demand Level Low Cool Off Offset (L.C.OF) (C.TYP = 1,2; Operating Modes  MODE  OCC=OFF) and This is the cooling set point offset subtracted from “cooling set Space Sensor Cool Mode Selection (C.TYP=4) point plus L.C.ON”...
Page 51 Table 30 — Cool/Heat Set Point Offsets Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT D.LV.T COOL/HEAT SETPT. OFFSETS L.H.ON Dmd Level Lo Heat On 0 to 2 DMDLHON H.H.ON Dmd Level(+) Hi Heat On 0.5 to 20.0 DMDHHON L.H.OF Dmd Level(-) Lo Heat Off 0.5 to 2.0 DMDLHOFF...
Page 52 Table 32 — Run Status Cool Display ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS COOL COOLING INFORMATION C.CAP Current Running Capacity 0-100 CAPTOTAL CUR.S Current Cool Stage 0-20 COOL_STG REQ.S Requested Cool Stage 0-20 CL_STAGE MAX.S Maximum Cool Stages 0-20 CLMAXSTG DEM.L...
Page 53 High Temp Cap Override (H.TMP) Heating Control Point (H.CPT) If stages of mechanical cooling are on and the error is greater Displays the current heating control point for Humidi-MiZer sys- than twice Y.PLU, and the rate of change of error is greater tem.
Page 54 Where: • High Temp Cap Override (H.TMP) Z.GN = configuration used to modify the threshold levels used • Low Temp Cap Override (L.TMP) for staging (Configuration  COOL  Z.GN) • Pull Down Cap Override (PULL) ADD.R = R.PCT * (C.CAP – capacity after adding a cooling •...
Page 55 Two-Switch Demand Limiting (DM.L.S = 1) A redline command or loadshed command will stay in effect until a Cancel redline or Cancel loadshed command is received This type of demand limiting utilizes 2 discrete inputs: or until the configurable Maximum Loadshed Time (SH.TM) •...
Page 56 Table 33 — Demand Limit Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT DMD.L DEMAND LIMIT CONFIG. DM.L.S Demand Limit Select 0 to 3 DMD_CTRL D.L.20 Demand Limit at 20 mA 0 to 100 DMT20MA SH.NM Loadshed Group Number 0 to 99 SHED_NUM SH.DL Loadshed Demand Delta...
Page 57 Circuit B Coils Circuit A Coils Applicable Units Tonnage Efficiency POWER Standard Controlling Output Contactor OFM(s) Logic Circuit Software Board Conrolled Controlled CONDFAN1 MBB Rly 6 OFC1 OFM 1 See Table CONDFAN2 MBB Rly 5 OFC2 OFM 3 See Table See Table CONDFAN3 RCB Rly 1...
Page 58 Circuit B Coils Applicable Units Circuit A Coils Tonnage Efficiency High Standard Standard POWER Standard Controlling Output Contactor OFM(s) Circuit Software Board Conrolled Controlled Logic CONDFAN1 MBB Rly 6 OFC1 OFM2 See Table CONDFAN2 MBB Rly 5 OFC2 OFM 1,3 See Table CONDFAN3 RCB Rly 1...
Page 59 Circuit B Coils Applicable Units Tonnage Efficiency High High High Standard High Standard Circuit A Coils POWER Controlling Output Contactor OFM(s) Logic Circuit Software Board Conrolled Controlled See Table CONDFAN1 MBB Rly 6 OFC1 OFM2 See Table Common CONDFAN2 MBB Rly 5 OFC2 OFM 4,5,6 See Table...
Page 60: Heating Control
Hydronic and steam heating applications that use the unit’s Heating Control control require the installation of a communicating actuator on The N Series ComfortLink controls offers control for 6 different the hydronic heating coil’s control valve. This actuator (with or types of heating systems to satisfy general space heating re- without matching control valve) may be separately shipped for quirements: 2-stage gas heat, 2-stage electric heat, SCR (mod-...
Page 61 Heating Control Type (HT.CF) (Configuration  HEAT  OC.EN). See descriptions above in the Setting Up the System section for more information. The heating control types available are selected/configured with this variable. Morning Warm-up 0 = No Heat The morning warm-up is a VAV RTU Linkage/ComfortLink mode.
Page 62 Table 35 — Heat/Cool Set Point Offsets ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT D.LV.T COOL/HEAT SETPT. OFFSETS L.H.ON Dmd Level Lo Heat On 0 to 2 DMDLHON H.H.ON Dmd Level(+) Hi Heat On 0.5 to 20 DMDHHON L.H.OF Dmd Level(-) Lo Heat Off 0.5 to 2 DMDLHOFF L.C.ON...
Page 63 Hydronic Heating Logic NOTE: The PID values should not be modified without ap- If the HVAC mode is LOW HEAT: proval from Carrier service personnel. • The control will command the supply fan on. Freeze Status Switch Logic (Inputs  GEN.I  FRZ.S) •...
Page 64 Configuring Hydronic Heat to Communicate Via Actuator Serial Number ACTUATOR SERIAL NUMBER Every actuator used in the N Series control system has its own SN.1 = 850 unique serial number. The rooftop control uses this serial num- 00850 - 30063 - 084 -083 SN.2 = 3 ber to communicate with the actuator, with the exception of hy- SN.3 = 63...
Page 65 SCR control. Staged Heat Capacity Calculation = “P + D” + old Staged Heat Capacity Calculation. NOTE: The PID values should not be modified without ap- proval from Carrier service personnel.
Page 66 Table 39 — Modulating Gas Heat Control Steps (HT.ST = 0) RELAY OUTPUT CAPACITY Heat 1 Heat 2 Heat 3 Heat 4 STAGE MBB-RLY8 TR1-CR SCB-RLY1 SCB-RLY2 IGC1 MGV1 IGC2 MGV2 OFF/ON* OFF/ON* OFF/ON*     * ON when Outputs HEAT H1.CP >...
Page 67 The electric heat outputs are located on the MBB. The analog Table 44 — IGC LED Indicators output that sets the SCR electric heat section capacity is locat- ed on the SCB. ERROR CODE LED INDICATION Limit Switch Temperature Monitoring (LIM.M) Normal Operation Hardware Failure Variable air volume applications in the low heat or tempering...
Page 68 Installing a New Sensor When the start-up sequence is complete, the TR1 checks the Procure a duct-mount temperature sensor (Carrier P/N input from the SC30 to determine which state to command the 33ZCSENPAT or equivalent 10,000 ohm at 25°C NTC [nega- induced-draft motor and main gas valve.
Page 69: Static Pressure Control
minimum position/minimum cfm, then the evaporator dis- electric heat, and hydronic heat is the same as in a heat mode. charge temperature (EDT) will be monitored. If the EDT falls More information regarding the operation of heating can be ref- below a particular trip point then tempering mode may be erenced in the Heating Control section.
Page 70 Too high a value will cause unnecessary assistance from Carrier service personnel before making sig- fan motor power consumption at part load conditions and/or nificant changes to these factors.
Page 71: Fan Status Monitoring
Static Pressure mA (SP.M) allow the air terminal system to dynamically adjust the supply duct static pressure set point as required. This variable reflects the value of the static pressure sensor sig- nal received by ComfortLink controls. It may, in some cases, The system will determine the actual set point required deliver- be helpful in troubleshooting.
Page 72: Dirty Filter Switch
Table 48 — Fan Status Monitoring Configuration Table 49 — Main Filter Types ITEM EXPANSION RANGE CCN POINT MAIN FILTER FINAL MAIN FILTER TYPE DESCRIPTION RESISTANCE SFS.S Fan Fail Shuts Down Unit No/Yes SFS_SHUT (MF_TY) (MF_FR) SFS.M Fan Stat Monitoring Type 0 to 2 SFS_MON Std 2 in.
Page 73: Economizer
The main and post filters use “Birth points” and current date to Table 51 — Maximum SACFM calculate filter life and filter reminder. The birth date and cur- rent date are expressed as the number of days since 1/1/2000. UNIT SIZE SCFM_CFG MAX_SACFM To change the main filter life, use Configuration ...
Page 74 The control shall test for a mechanically disconnected damper seconds, a “damper stuck or jammed” alert shall be logged, if all the following conditions are true: i.e., abs(ECONxPOS - ECONODMD) > EC_FLGAP for a continuous time period EC_FLTMR seconds. 1. An economizer is installed. •...
Page 75 • In Navigator display, this test shall be located at Service below the Step 4 baseline measurement, a fault is logged, Test  AC.DT  EC.TS. and the test is ended. Repeat Steps 1-5 for additional actuator/damper assemblies. • Running test shall require...
Page 76 SAT Settling Time (SAT.T) T24 AutoTest SF Run Time (AC.MR) The amount of time (in seconds) the economizer reported posi- Amount of time to run supply fan before sampling torque or tion must remain unchanged (± EC.MD) before the control will making torque comparison.
Page 77 Table 54 — Economizer Configuration Table (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT SN.1.4 Econ 1 Out Ser Number 4 0-254 ECN1_SN4 C.A.L1 Ecn1 Out Ctl Angl Lo Lmt 0-90 ECONCALM SN.2.1 Econ 2 Ret Ser Number 1 0-9999 ECN2_SN1 SN.2.2 Econ 2 Ret Ser Number 2...
Page 78 NOTE: If the user wishes to disable the enthalpy switch from NOTE: If the user wishes to disable the enthalpy switch from running concurrently, a field-supplied jumper must be installed running concurrently, a field-supplied jumper must be installed between TB201 terminals 3 and 4. between TB201 terminals 3 and 4.
Page 79 95 100 105 110 115 Fig. 11 — Custom Changeover Curve Example UNOCCUPIED ECONOMIZER FREE COOLING Unoccupied Economizer Free Cooling Logic Unoccupied free cooling can only operate with the qualifications: This “Free Cooling” function is used to start the supply fan and use the economizer to bring in outside air when the outside •...
Page 80 OUTDOOR AIR CFM CONTROL default to 7500 cfm for the standard flow station and 17500 for extended flow station. If an outdoor air cfm flow station has been installed on an N Series Single Act Max CFM DB (S.M.DB) rooftop, the economizer is able to provide minimum ventilation based on cfm, instead of damper position.
Page 81 In addition, it should be noted that the economizer cooling al- There are 4 types of control. gorithm is designed to automatically slow down the economiz- C.TYP = 1 VAV-RAT er actuator’s rate of travel as outside-air temperature decreases. C.TYP = 2 VAV-SPT See Table 55.
Page 82: Building Pressure Control
Building Pressure Setpoint Offset (BP.SO) Building Pressure Control For building pressure configurations BP.CF=1, this is the offset The N Series ComfortLink controller supports several physical below the building pressure set point that the building pressure rooftop configurations used to control building pressure. This must fall below to turn off and disable power exhaust control.
Page 83 Fan Track Initial DCFM (FT.ST) BUILDING PRESSURE CONTROL BASED ON BP.CF For BP.CF = 2, this return/exhaust control configuration is the VFD Controlling Exhaust Fan Motors (BP.CF =1) start point upon which corrections (offset) are made over time VFD controlling high capacity power exhaust consists of an when FT.CF = Yes and is the constant control point for delta exhaust fan VFD (Outputs ...
Page 84: Smoke Control Modes
Smoke Control Modes FIRE There are 4 smoke control modes that can be used to control DEVICE PRESSURIZATION PURGE EVACUATION smoke within areas serviced by the unit: Pressurization mode, Economizer 100% 100% Evacuation mode, Smoke Purge mode, and Fire Shutdown. Indoor Fan —...
Page 85 OPERATION If OAQ exceeds the OAQ Lockout Value (OAQ.L), then the economizer will remain at IAQ.M. This is used to limit the use The unit’s indoor air quality algorithm modulates the position of outside air which outdoor air CO levels are above the of the economizer dampers between 2 user configurations de- OAQ.L limit.
Page 86 Table 57 — Indoor Air Quality Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT DCV.C DCV ECONOMIZER SETPOINTS EC.MN Economizer Min.Position 0 to 100 ECONOMIN IAQ.M IAQ Demand Vent Min.Pos. 0 to 100 IAQMINP Economizer Min.Flow 0 to 20000 OACFMMAX 2000 O.C.MX IAQ Demand Vent Min.Flow...
Page 87 IAQ Low Reference (Configuration  IAQ  AQ.S.R  IQ.R.L) IAQ Purge OAT Lockout Temp (Configuration  IAQ  This is the reference that will be used with a non-Carrier IAQ IAQ.P  IQ.L.O) sensor that may have a different characteristic curve. It rep-...
Page 88: Humidification
If a humidifier using a proportional steam valve is selected, the This configuration is the PID Integral Gain. Carrier actuator (Carrier Part No. HF23BJ050) must be adapted to Humidifier Derivative Gain (HM.D) the humidifier manufacturer’s steam valve. Contact Belimo Air controls for information on actuator linkage adapter packages re- This configuration is the PID Derivative Gain.
Page 89: Dehumidification And Reheat
OPERATION The dehumidification sequence requires the installation of a space or return air humidity sensor or a discrete switch input. A For operation, PID control will be utilized. The process will CEM (option or accessory) is required to accommodate an RH run at the rate defined by the Configuration ...
Page 90: Humidi-Mizer Adaptive Dehumidification System
• D.V.CF = 1 — Reheat follows a dehumidification heat set • Reheat When Cooling Demand is Present — For reheat point (D.V.HT). control during dehumidification: If reheat follows an offset subtracted from return-air temperature (Configura- Vent Reheat RAT Offset (D.V.RA) tion ...
Page 91 Table 60 — Dehumidification Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT DEHU DEHUMIDIFICATION CONFIG. D.SEL Dehumidification Config DHSELECT D.SEN Dehumidification Sensor DHSENSOR D.EC.D Econ disable in DH mode? No/Yes DHECDISA D.V.CF Vent Reheat Setpt Select DHVHTCFG D.V.RA Vent Reheat RAT offset DHVRAOFF D.V.HT Vent Reheat Setpoint...
Page 92 The N Series Humidi-MiZer system controls allow for the dis- through the Humidi-MiZer coil, it is exposed to the cold supply charge air to be reheated to either the return air temperature mi- airflow coming from the evaporator coil. The refrigerant is sub- nus a configurable offset or to a configurable Reheat set point cooled in this coil to a temperature approaching the evaporator (default 70°F).
Page 93: Temperature Compensated Start
It is possible to configure the ComfortLink controls to partici- This is the factor for the start time bias equation for cooling. pate as an element of the Carrier Comfort Network (CCN) sys- TCST-Heat Factor (TCS.H) tem directly from the local display. This section will deal with explaining the various programmable options which are found This is the factor for the start time bias equation for heating.
Page 94: Alert Limit Configuration
tion set to ON. If more than one time broadcaster is present, Override Time Limit (O.T.L) problems with the time will occur. This configuration allows the user to decide how long an over- NOTE: Only the time and date broadcaster can perform day- ride occurs when it is initiated.
Page 95 Table 61 — CCN Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT CCN CONFIGURATION CCNA CCN Address 1 to 239 CCNADD CCNB CCN Bus Number 0 to 239 CCNBUS BAUD CCN Baud Rate 1 to 5 CCNBAUDD BROD CCN BROADCST DEFINITIONS TM.DT CCN Time/Date Broadcast Off/On...
Page 96: Sensor Trim Configuration
Doing so may Discharge Pressure Circuit A Trim (DP.A.T) impair or negatively affect the Carrier product warranty. This variable is used to adjust the discharge pressure sensor Air Temperature Leaving Supply Fan Sensor (SAT.T) reading for Circuit A.
Page 97: Discrete Switch Logic Configuration
However, if a field-installed switch is used that The fire shutdown input is set for normally open when off. If a is different from the Carrier switch, these settings may need ad- field-supplied fire shutdown input is used that is normally justment.
Page 98: Display Configuration
Table 64 — Switch Logic Configuration ITEM EXPANSION RANGE CCN POINT DEFAULT SW.LG SWITCH LOGIC: NO / NC PWS.L Power Fault Input - Good Open/Close PWRFLOGC Close MFT.L Filter Status Input - Clean Open/Close FLTSLOGC Open PFT.L Post Filter Stat. In-Clean Open/Close PFLTSLGC Open...
Page 99 Table 65 — Display Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT TEST Test Display LEDs Off/On TEST METR Metric Display Off/On DISPUNIT LANG Language Selection 0-1(multi-text strings) LANGUAGE PAS.E Password Enable Disable/Enable PASS_EBL Enable PASS Service Password 0000-9999 PASSWORD 1111 Table 66 —...
Page 100: Remote Control Switch Input
VFD2 Motor Direction (M.DIR) When the remote switch is OFF, the unit will use its inter- nal or external time schedules. This configuration sets the direction of motor rotation. Motor direction change occurs immediately upon a change to this Remote Switch Logic Configuration (Configuration  configuration.
Page 101: Time Clock Configuration
that period’s occupied time schedule. If this variable is set to TIME CLOCK CONFIGURATION NO, then the period’s occupied time schedule will not be used This section describes each Time Clock menu item. Not every on Friday. This variable can be set for Periods 1 through 8. point will need to be configured for every unit.
Page 102 Table 71 — Time Clock Menu ITEM EXPANSION RANGE CCN POINT DEFAULT TIME TIME OF DAY HH.MM Hour and Minute 00:00 TIME DATE MONTH,DATE,DAY AND YEAR MNTH Month of Year multi-text strings Day of Month 0-31 Day of Week multi-text strings DOWDISP YEAR Year...
Page 103: Troubleshooting
THERMISTOR/TEMPERATURE SENSOR CHECK TROUBLESHOOTING A high quality digital volt-ohmmeter is required to perform The Navigator™ display shows the actual operating conditions this check. of the unit while it is running. If there are alarms or there have been alarms, they will be displayed in either the current alarm 1.
Page 104 Table 72 — Cooling Service Analysis PROBLEM CAUSE REMEDY Power failure. Check power source. Call power company. Fuse blown or circuit breaker tripped. Check fuses and Replace fuse or reset circuit breaker. circuit breakers in power and control panels. Disconnect off. Power disconnect.
Page 105 Table 73 — Humidi-MiZer Service Analysis ® PROBLEM CAUSE REMEDY Check alarm history for general cooling mode operation problems. See Table 72. Circuit B compressors unavailable Check for Circuit B compressors locked out. General Cooling Mode problem See Table 72. Check that a relative humidity sensor is connected and that the appropriate sensor is configured in the unit software, Humidi-MiZer relative humidity sensor...
Page 106 Table 73 — Humidi-MiZer Service Analysis (cont) ® PROBLEM CAUSE REMEDY Check the unit supply air set point for cooling operation. This is the Supply air set point for cooling is too temperature that the valves will modulate to meet during a high/low dehumidification mode.
Page 107 Table 74 — Gas Heating Service Analysis PROBLEM CAUSE REMEDY Active alarm. Check active alarms using ComfortLink Navigator display. No power to unit. Check power supply, fuses, wiring, and circuit breakers. No power to IGC (Integrated Gas Control). Check fuses and plugs. Heaters off due to time guard to prevent short Check using ComfortLink Navigator display.
Page 108 LEGEND IDM — Induced-Draft Motor IGC — Integrated Gas Unit Controller NOTE: Thermostat Fan Switch is in the “AUTO” position. Fig. 16 — IGC Service Analysis Logic...
Page 109 Table 76 — 10K Thermistor vs Resistance (T55, T56, T58, OAT, RAT, EDT, LAT, EAT Sensors) (F) TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE (Ohms) (Ohms) (Ohms) –25 196,453 14,925 2,166 –24 189,692 14,549 2,124 –23 183,300 14,180 2,083 –22 177,000 13,824 2,043 –21...
Page 110 Table 77 — 10K Thermistor vs Resistance (T55, T56, T58, OAT, RAT, EDT, LAT, EAT Sensor) (C) TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE (Ohms) (Ohms) (Ohms) –32 200,510 15,714 2,315 –31 188,340 15,000 2,235 –30 177,000 14,323 2,157 –29 166,342 13,681 2,083 –28...
Page 111 Table 79 — 5K Thermistor vs Resistance (RTA1, ST-A1, ST-A2, ST-B1, ST-B2) (F) TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE (Ohms) (Ohms) (Ohms) 7,686 1,190 –25 98,010 –24 7,665 1,165 94,707 7,468 1,141 –23 91,522 7,277 1,118 –22 88,449 7,091 1,095 –21 85,486 6,911...
Page 112 Table 80 — 5K Thermistor vs Resistance (RTA1, ST-A1, ST-A2, ST-B1, ST-B2) (C) TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE (Ohms) (Ohms) (Ohms) 7,855 1,158 –32 100,260 –31 7,499 1,118 94,165 7,161 1,079 –30 88,480 6,840 1,041 –29 83,170 6,536 1,006 –28 78,125 6,246...
Page 113 Table 81 — Suction Pressure Transducer (psig) vs Voltage (SSP-A, SSP-B) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 0.466 1.509 2.543 3.576 0.476 1.519 2.553 3.586 0.486 1.529 2.562 3.596...
Page 114 Table 82 — Liquid Pressure Transducer Discharge Pressure Transducer (psig) vs Voltage PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 14.5 0.500 0.993 1.490 1.987 0.509 1.000 1.496 1.993 0.515 1.006...
Page 115 Table 82 — Liquid Pressure Transducer Discharge Pressure Transducer (psig) vs Voltage (cont) PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE PRESSURE VOLTAGE (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) (PSIG) DROP (V) 2.483 2.992 3.501 4.010 2.489 2.998 3.507 4.016 2.495 3.004...
Page 116: Run Status Menu
Run Status  VIEW  EC.C.P Run Status Menu Displays the current economizer control point value (a target The Run Status menu provides the user important information value for air temperature leaving the evaporator coil location). about the unit. The Run Status table can be used to trouble- shoot problems and to help determine how and why the unit is Run Status ...
Page 117 Table 84 — Economizer Run Status Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS ECON ECONOMIZER RUN STATUS EC1.P Economzr1 Act.Curr.Pos. 0-100 ECON1POS EC2.P Economzr2 Act.Curr.Pos. 0-100 ECON2POS EC3.P Economzr3 Act.Curr.Pos. 0-100 ECON3POS ECN.C Economizer Act.Cmd.Pos. 0-100 ECONOCMD forcible ACTV Economizer Active?
Page 118 Table 85 — Cooling Information Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS COOL COOLING INFORMATION C.CAP Current Running Capacity 0-100 CAPTOTAL CUR.S Current Cool Stage 0-20 COOL_STG REQ.S Requested Cool Stage 0-20 CL_STAGE MAX.S Maximum Cool Stages 0-20 CLMAXSTG DEM.L...
Page 119 cycled at very fast rates, the set point could be maintained very information can be used to help determine why the unit is in precisely. Since it is not desirable to cycle compressors more the current mode. than 6 cycles per hour, slow change override takes care of keep- CCN/LINKAGE DISPLAY TABLE ing the PID under control when “relatively”...
Page 120 Table 87 — Mode Trip Helper Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS TRIP MODE TRIP HELPER UN.C.S Unoccup. Cool Mode Start 0-100 UCCLSTRT UN.C.E Unoccup. Cool Mode End 0-100 UCCL_END OC.C.S Occupied Cool Mode Start 0-100 OCCLSTRT OC.C.E Occupied Cool Mode End...
Page 121: Alarms And Alerts
it can function properly, the circuit will strike out, causing the Alarms and Alerts shutdown alarm for that particular circuit. Once activated, the There are a variety of different alerts and alarms in the system. shutdown alarm can only be cleared via an alarm reset. P —...
Page 122 Table 92 — Alert and Alarm Codes (cont) ALARM OR ALERT DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD NUMBER T093 Circ B Suction Press Transducer Failure Circuit shut down Automatic T094 Circ A EXV 1 Thermistor Failure Circuit shut down Automatic T095 Circ A EXV 2 Thermistor Failure...
Page 123 Table 92 — Alert and Alarm Codes (cont) ALARM OR ALERT DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD NUMBER T308 Return Air Relative Humidity Below Limit Alert only Automatic T309 Return Air Relative Humidity Above Limit Alert only Automatic T310 Supply Duct Static Pressure Below Limit Alert only Automatic...
Page 124 Table 92 — Alert and Alarm Codes (cont) ALARM OR ALERT DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD NUMBER T622 Economizer 2 Actuator Control Range Increased Alert only Automatic T623 Economizer 2 Actuator Overload, Setpoint Not Reached Alarm only Automatic T624 Economizer 2 Actuator Excessive Utilization Alert only...
Page 125 DIAGNOSTIC ALARM CODES AND POSSIBLE CAUSES A051 (Circuit A, Compressor 1 Stuck On Failure) A052 (Circuit A, Compressor 2 Stuck On Failure) T048 (Ckt A, Oil Return Not Reliable with Only One Comp A053 (Circuit A, Compressor 3 Stuck On Failure) Available) A059 (Circuit A, Compressor 4 Stuck On Failure) T049 (Ckt B, Oil Return Not Reliable with Only One Comp...
Page 126 SST (F) Fig. 17 — High Pressure/SCT Alarm Upper Envelope This is done to make a rough calibration of the high pressure end of running the EXVs auto-component test, this alert will be switch trip point. In most cases this allows the control to detect logged.
Page 127 Recovery from this alert is automatic. Reason for error is either a T094 (Circ A EXV 1 Thermistor Failure) faulty thermistor in the T55, T56, or T58 device, wiring error, or T095 (Circ A EXV 2 Thermistor Failure) damaged input on the MBB control board. The associated circuit becomes disabled whenever this therm- T075 (Return Air Thermistor Failure) istor (Temperatures ...
Page 128 P120 (Circuit A Low Saturated Suction Temp, Comp Shutdown) P127) and a 10-minute timeguard will be added to the com- T120 (Circuit A Low Saturated Suction Temperature Alert) pressor. If the saturated condensing temperature remains above A120 (Circuit A Low Saturated Suction Temperature Alarm) the envelope for 5 more seconds, another compressor of the af- P121 (Circuit B Low Saturated Suction Temp, Comp Shutdown) fected circuit, if it exists, will be shut down with pre-alert...
Page 129 This alarm will disable mechanical cooling and will require a is automatic. Reason for failure may be due to incorrect wiring, manual reset. This alarm may be disabled once the reverse ro- power loss to the control board, or damage to the RS-485 driv- tation check has been verified by setting Configuration ers on the LEN bus.
Page 130 alert. When the rooftop loses its link, the temperature and set SP.H.U] for 10 minutes), then an alert will be broadcast. The alert points are derived locally. Recovery is automatic on re-establish- will automatically reset. ment of communications. Reason for failure may be wiring er- T302 (Supply Temperature Below Limit) ror, too much bus activity, or damaged RS-485 drivers.
Page 131 measured pressure (Pressures  AIR.P  BP) is above the limit mode requiring the complete shutdown of the unit. Recovery is for 5 minutes, then the alert will occur. automatic when the inputs are no longer on. T314 (IAQ Above Limit) A405 (Evacuation Emergency Mode If the unit is configured to use a CO sensor and the level (In-...
Page 132 VFD keypad will indicate which fault has occurred. Reset can be prevent multiple alerts and recoveries from clogging the alarm done at the unit control (Alarms  R.CUR) or the VFD keypad. histories. T411 (Exhaust Fan VFD Fault) T423 (Thermostat Y and W Inputs On) The MBB has received a fault status from the exhaust fan Simultaneous calls for heating and cooling are illegal and will VFD.
Page 133 reasonable time to catch the failure. Compressors will be not be T615 (Econ 1 (Outside 1) Not Economizing When it Should) inhibited by this failure. Recovery is automatic. Reason for fail- T625 Econ 2 (Return) Not Economizing When It Should ure may be a faulty current sensor board, incorrect wiring, or a T655 Econ 3 (Outside 2) Not Economizing When it Should damaged input on the CXB control board.
Page 134: Major System Components
T801 (Invalid Sensor Enable. Check Building Pressure Mode) MAJOR SYSTEM COMPONENTS This alert occurs when there has been an illegal combination of General configurations made in the Building Pressure configurations. The 48/50N Series package rooftop units with electric cooling and If the Building Pressure Control is configured for VFD Power with gas heating (48N units) or electric cooling and electric or hy- Exhaust and the return fan CFM sensor (RCFMSENS) is en-...
Page 135 Fig. 18 — 48/50N Typical Power Schematic (Nominal 075-Ton Unit Shown)
Page 136 Fig. 19 — 48/50N Typical Power Schematic (Nominal Ton 90-150 Units Shown)
Page 137 Fig. 20 — 48/50N Main Base Board Input/Output Connections...
Page 138 a48-9307 Fig. 21 — 48/50N RXB, EXB, CEM Input/Output Connections...
Page 139 a48-9308 Fig. 22 — 48/50N EXV, SCB Input/Output Connections...
Page 140 Fig. 23 — 48N Typical Modulating Gas Heat Unit Control Wiring...
Page 141 Fig. 24 — 50N Typical Electric Heat Unit Control Wiring...
Page 142 Fig. 25 — 48N Typical Gas Heat Section Wiring (Nominal Ton 75 to 105, Low Heat Units)
Page 143 Fig. 26 — 48N Typical Modulating Gas Heat Section Wiring (Nominal Ton 75 to 105, Low Heat Units)
Page 144 Fig. 27 — 48N Typical Gas Heat Section Wiring (Nominal Ton 120 to 150 Units)
Page 145 Fig. 28 — 48/50N Typical Power Component Control Wiring, 460 v...
Page 146 Fig. 29 — 48/50N Component Control Wiring, 575 v (Nominal Ton 075 to 150 Units)
Page 147 Fig. 30 — 48/50N Component Arrangement Power Box...
Page 148 Fig. 31 — 48/50N Component Arrangement Control Box...
Page 149 — Motormaster VFD To indicate common potential CCHR — Crankcase Heater Relay — Communications only, not to represent wiring. — Carrier Comfort Network® — National Electrical Code To indicate factory-installed — Cooling Coil Thermistor — Outdoor Air option or accessory —...
Page 150: Factory-Installed Components
VFDs through the LEN communications port. remote set point and other optional inputs typically needed for en- The MBB also interfaces with the Carrier Comfort Network ® ergy management systems. See Fig. 35. On CCN systems, these system through the CCN communications port located on the inputs can be interfaced to through the CCN communications.
Page 151 Table 94 — Main Control Board (MBB) Inputs and Outputs I/O POINT CONTROL CONNECTOR POINT NAME POINT DESCRIPTION TYPE OF I/O UNITS NAME BOARD PIN NO. INPUTS IGCFAN IGC IFO input Switch Input J6, 3-4 Fire Shutdown Switch, RA/SA Smoke Switch Input J6, 5-6 Detector...
Page 152 RED LED - STATUS YELLOW LED - GREEN LED - LEN (LOCAL EQUIPMENT NETWORK) CCN (CARRIER COMFORT NETWORK) INSTANCE JUMPER (SET TO 1) CEPL130346-01 HK 50AA029 CE BO 430346 STATUS Fig. 32 — Main Base Board (MBB) Table 95 — Rooftop Control Board (RXB) Inputs and Outputs...
Page 153 Table 96 — Economizer Control Board (EXB) Inputs and Outputs CONTROL CONNECTOR POINT NAME POINT DESCRIPTION TYPE OF I/O I/O POINT NAME BOARD PIN NO. INPUTS Plenum Press. Safety Sw. Switch Input J4, 1-2 SACFM Supply Air CFM Transducer (4-20mA) J5, 1-3 RACFM Return Air CRM...
Page 154 ADDRESS DIP RED LED- GREEN LED- SWITCHES ALL ON STATUS LEN (LOCAL EQUIPMENT NETWORK) CEBD430427 HK50AA032 CEPL130427 4-POSITION DIP SWITCH XDCR/THERM THERM 0-20mA OUT Fig. 34 — Staged Gas Heat Control Board (SCB) CEBD430351 STATUS TEST 2 GREEN LED - ADDRESS RED LED - STATUS LEN (LOCAL EQUIPMENT NETWORK)
Page 155 Hall Effect sensor. The IGC is equipped with a LED (light- ries. See Table 103. The circuit breakers for the low voltage con- emitting diode) for diagnostics. See Table 104. trol transformers, interface connection for the Carrier Comfort...
Page 156 Table 99 — Compressor Expansion Board (CXB) Inputs and Outputs POINT NAME POINT DESCRIPTION TYPE OF I/O I/O POINT NAME CONTROL BOARD CONNECTOR PIN NO. INPUTS CSB_A3 Compressor A3 Feedback Digital Input DIG1 J5, 10-12 CSB_B3 Compressor B3 Feedback Digital Input DIG2 J5, 7-9 CSB_A4...
Page 157 Communication CCN - Communication SHIELD Ground Ground Local Equipment Network Communication Carrier Comfort Network Communication TB202 - FIELD CONNECTIONS CEM (in Main Control Box) Not Used — Not Used — Space Humidity 4-20 mA (-) 4 to 20 mA signal...
Page 158 Table 103 — Field Terminal Connections (cont) BOARD NO. TERMINAL NO. DESCRIPTION TYPE TB203 - FIELD CONNECTIONS CEM (in Main Control Box) Filter Pressure Switch/Sensor - Return (+) 4 20 mA loop when used with 180 Ohm resistor Filter Pressure Switch/Sensor - Return (-) 4 20 mA signal when used with 180 Ohm resistor Filter Pressure Switch/Sensor - Supply (+) 4 20 mA loop when used with 180 Ohm resistor...
Page 159 NAVIGATOR™ DISPLAY Yellow LED This device is the interface used to access the control informa- The MBB has one yellow LED. The Carrier Comfort Network tion, read sensor values, and test the unit. The Navigator dis- ® (CCN) LED will blink during times of network communication.
Page 160 To connect the unit to the network: Table 108 — VFD Terminal Designations 1. Turn off power to the control box. TERMINAL FUNCTION 2. Cut the CCN wire and strip the ends of the red (+), white (ground), and black (–) conductors. (Substitute appropriate 3-phase main circuit input power supply colors for different colored cables.) 3.
Page 161: Accessory Control Components
SMOKE DETECTOR BOARD ADDRESSES The units can be equipped with an accessory smoke detector Each board in the system has an address. The MBB has a de- located in the supply or return air. The detector is wired to the fault address of 1 but it does have an instance jumper that ComfortLink controls and, if activated, will stop the unit by should be set to 1 as shown in Fig.
Page 162 HVAC EQUIPMENT COMFORT CONTROLLER AIR DISTRIBUTION-DIGITAL AIR VOLUME CONTROL (DAV) LEGEND — Carrier Comfort Network ® — ComfortLink Controls — Digital Air Volume HVAC — Heating, Ventilation, and Air Conditioning — Terminal Control Unit Fig. 37 — CCN System Architecture...
Page 163 Filter Pressure Sensor - Return (+24 VDC, 4 20 mA loop power). Transducer is mounted in Control Box. HK05ZG019 PFDP Filter Pressure Sensor - Return (+24 VDC, 4 20 mA loop power). Transducer is mounted in Control Box. HK06WC035 LEGEND — Carrier Comfort Network — Expansion Valve Control Board — Minimum Load Hot Gas Bypass Valve —...
Page 164: Service
and attach the end of the chain to the adjacent clip. See Fig. 40. SERVICE To close the door, reverse the procedure. Service Access The unit is also equipped with removable panels to gain access All unit components can be reached through clearly labeled to areas that do not normally require service.
Page 165 NOTE: Disassembly of the top cover may be required under spe- COMBUSTION-AIR BLOWERS (48N ONLY) cial service circumstances. It is very important that the orientation Clean periodically to assure proper airflow and heating effi- and position of the top cover be marked on the unit prior to disas- ciency.
Page 166 PRESSURE TUBING MODULATING GAS VALVE PRESSURE SWITCH PRESSURE FITTING See Detail A, Fig. 44. NOTE: Modulating Gas (Always Section #1) Fig. 43 — Modulating Gas Heat PRESSURE FITTING (SEE DETAIL A) FLUE PRESSURE OUTLET TUBING FLUE PRESSURE SWITCH COVER MODULATING VALVE VALVE FLUE...
Page 167 ROLLOUT SWITCH VALVE IGNITOR FLAME SENSOR Fig. 45 — Standard Gas Burner Details ROLLOUT VALVE SWITCH MODULATING GAS VALVE IGNITION FLAME SENSOR Fig. 46 — Modulating Gas Burner Assembly...
Page 168 IGNITION DETAILS SENSOR DETAILS Fig. 47 — Sensor and Ignition Position Fig. 48 — Combustion Blower Details...
Page 169: Adjustments
belts can result in uneven belt stretching and a mismatched Adjustments set of belts.) See Fig. 51. RETURN FAN MOTOR PLATE 3. Before tensioning the belts, equalize belt slack so that it is Adjust using a wrench on the adjusting bolts: on the same side of the belt for all belts.
Page 170 3. See Fig. 53 and adjust fan height using a straight edge laid motor must be removed for service or replacement, be sure to regrease fan shaft and reinstall fan cover, retaining clips, and across the fan deck. fan guard. For proper performance, the fans should be posi- 4.
Page 171: Cleaning
REFRIGERANT CHARGE and use caution to prevent damage to air centers. Amount of refrigerant charge is listed on unit nameplate. Refer to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, CAUTION and Reclamation section for charging methods and procedures. Excessive water pressure will fracture the braze between air Unit panels must be in place when unit is operating during centers and refrigerant tubes.
Page 172 Units With Humidi-MiZer® Adaptive Dehumidification System 4. Using the cooling charging charts provided (Fig. 56-77), add or remove refrigerant until conditions of the chart are NOTE: All circuits must be running in normal cooling mode. In- met. As conditions get close to the point on the chart, add door airflow must be within specified air quantity limits for cool- ing.
Page 173 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 56 — Charging Chart — 75 Ton Standard Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 174 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 58 — Charging Chart — 75 Ton High Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 175 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 60 — Charging Chart — 90 Ton Standard Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 176 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 62 — Charging Chart — 90 Ton High Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 177 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 64 — Charging Chart — 105 Ton Standard Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 178 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 66 — Charging Chart — 105 Ton High Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 179 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 68 — Charging Chart — 120 Ton Standard Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 180 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 70 — Charging Chart — 120 Ton High Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 181 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 72 — Charging Chart — 130 Ton Standard Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 182 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 74 — Charging Chart — 130 Ton High Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 183 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig. 76 — Charging Chart — 150 Ton Standard Capacity, Standard Efficiency 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
Page 184: Gas System Adjustment (48N Only)
Change filter driers at the first sign of moisture in the system. 9. Remove 2 screws that hold the burner support plate flange See Carrier Charging Handbook for more information. to the vestibule plate. 10. Lift burner assembly out of unit.
Page 185: Filter Drier
Filter Drier IMPORTANT: After a prolonged shutdown or service Replace whenever the moisture/liquid indicator shows mois- job, energize the crankcase heaters for 24 hours before ture in the system or when the system was opened for service. starting the compressor. Liquid Line Service Valves Use caution when closing liquid line service valves.
Page 186: Control Circuit, 24 V
gas heating system is locked out (7 flashes on IGC board) until Control Circuit, 24 V the rollout switch is reset manually. Reset rollout switch manual- This control circuit is protected against overcurrent by two 10- ly by powering down and powering up of the unit. amp and four 3.2-amp circuit breakers.
Page 187: Appendix A - Local Display Tables
APPENDIX A — LOCAL DISPLAY TABLES MODE — RUN STATUS EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. ITEM VIEW AUTO VIEW OF RUN STATUS ascii string spelling out the hvac modes string HVAC Occupied? No/Yes OCCUPIED forcible Mixed Air Temperature -40 to 240 Evaporator Discharge Tmp -40 to 240...
Page 188 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — RUN STATUS (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. COOL (cont) HMZR HUMIDIMIZER CAPC HumidiMizer Capacity 0 to 100 HMZRCAPC 52,53,118 C.EXV Condenser EXV Position 0 to 100 COND_EXV 52,53,118 B.EXV...
Page 189 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — RUN STATUS (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. LINK CCN - LINKAGE MODE Linkage Active - CCN Off/On MODELINK L.Z.T Linkage Zone Control Tmp -40 to 240 L.C.SP Linkage Curr.
Page 190 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — SERVICE TEST ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. TEST Service Test Mode Off/On MAN_CTRL 29,30,34 STOP Local Machine Disable No/Yes UNITSTOP config 29,30 S.STP Soft Stop Request No/Yes SOFTSTOP forcible...
Page 191 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — SERVICE TEST (CONT) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. TEST COOLING COOL E.POS Econ 1 Out Act.Cmd.Pos. 0 to 100 ECONCOOL 30,33 Static Pressure Setpoint 0 to 5 "H2O SPSPCTST 30,33...
Page 192 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — SERVICE TEST (CONT) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. AUTO-COMPONENT DIAG TEST (cont) AC.DT (cont) CD.TS CHARGE TST W/O LQD SENS. 32,34 Run Chrg Tst w/o Lqd Sen No/Yes AC_CDTR CD.TR...
Page 193 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — TEMPERATURES ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS AIR.T AIR TEMPERATURES CONTROL TEMPS CTRL Evaporator Discharge Tmp -40 to 240 Leaving Air Temperature -40 to 240 Mixed Air Temperature -40 to 240 R.TMP Controlling Return Temp -40 to 240...
Page 194 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — INPUTS ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS GEN.I GENERAL INPUTS PWR.F Power Fault Input Normal/Alarm PWRFAULT forcible MFL.S Main Filter Status Input Clean/Dirty FLTS forcible PFL.S Post Filter Status Input Clean/Dirty PFLTS forcible...
Page 195 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — INPUTS (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS 4-20 4-20 MILLIAMP INPUTS IAQ.M IAQ Milliamps 0 to 20 IAQ_MA OAQ.M OAQ Milliamps 0 to 15 OAQ_MA SP.R.M SP Reset milliamps 0 to 20 SPRST_MA DML.M...
Page 196 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — OUTPUTS ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS FANS FANS SF.BY Supply Fan Bypass Relay Off/On SFBYRLY S.VFD Supply Fan VFD Speed 0 to 100 SFAN_VFD E.VFD Exhaust Fan VFD Speed 0 to 100 EFAN_VFD PE.BY...
Page 197 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — CONFIGURATION ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. UNIT UNIT CONFIGURATION 27,39,42,44,47-51, C.TYP Machine Control Type 1 to 4 CTRLTYPE 56,81,89 SIZE Unit Size (75 - 150) 75 to 150 UNITSIZE 42,45 FN.MD...
Page 198 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. COOL (cont) COOLING CONFIGURATION (cont) M.PID MOTORMASTER PID CONFIGS MM.RR Motor Master PI Run Rate 5 to 120 Seconds MM_RATE MM.PG Motor Master Prop.
Page 199 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. SG.CF STAGED HEAT CONFIGS 60,64 HT.ST Modulating Gas Type 0 to 3 HTSTGTYP 60,64 CAP.M Max Cap Change per Cycle 5 to 45 HTCAPMAX 60,64...
Page 200 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. ECON ECONOMIZER CONFIGURATION EC.EN Economizer Installed? No/Yes ECON_ENA 27,76,77 EC.MN Economizer Min.Position 0 to 100 ECONOMIN 27,76,77 EC.MX Economizer Max.Position 0 to 100 ECONOMAX 27,76,77...
Page 201 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. ECON (cont) ECONOMIZER CONFIGURATION (cont) 0=Never, 1=Monday, 2=Tuesday, 3=Wednesday, EC.DY T24 Econ Auto-Test Day T24_ECDY 6=Saturday 4=Thursday, 5=Friday, 6=Saturday, 7=Sunday EC.TM T24 Econ Auto-Test Time 0 - 23...
Page 202 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. IAQ (cont) INDOOR AIR QUALITY CFG. (cont) IQ.I.C IAQ Discrete Input Confg 0 to 2 IAQINCFG 38,42,86 IQ.I.F IAQ Disc.In. Fan Config 0 to 2 IAQINFAN 38,86...
Page 203 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. CCN (cont) CCN CONFIGURATION (cont) SC.OV (cont) CCN SCHEDULES-OVERRIDES (cont) OV.EX Override Time Limit 0 to 4 Hours OVR_EXT 94,95 SPT.O SPT Override Enabled ? No/Yes...
Page 204 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. ALLM (cont) ALERT LIMIT CONFIG. (cont) DISP (cont) DISPLAY CONFIGURATION (cont) PASS Service Password 0000 to 9999 PASSWORD 1111 S.VFD SUPPLY FAN VFD CONFIG N.VLT VFD1 Nominal Motor Volts...
Page 205 APPENDIX A — LOCAL DISPLAY TABLES (CONT) MODE — TIMECLOCK ITEM EXPANSION RANGE UNITS CNN POINT DEFAULTS PAGE NO. TIME TIME OF DAY HH.MM Hour and Minute 00:00 to 23:59 TIME DATE MONTH,DATE,DAY AND YEAR MNTH Month of Year multi text string Day of Month 1 to 31 Day of Week...
Page 206: Appendix B - Ccn Tables
All N Series units with ComfortLink controls have a port for in- In the following tables the structure of the tables which are used with the Service Tool as well as the names and data that terface with the Carrier Comfort Network (CCN) system. On ®...
Page 207 APPENDIX B — CCN TABLES (CONT) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS ECONDIAG Economizer Active ? No/Yes ECACTIVE Conditions which prevent economizer being active: Econ1 Out Act Unvailabl? No/Yes ECONUNAV Econ2 Ret Act Unvailabl? No/Yes ECN2UNAV Econ3 Out Act Unvailabl?
Page 208 APPENDIX B — CCN TABLES (CONT) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS HEATING (cont) Relay 5 W1 Gas Valve 3 Off/On Relay 6 W2 Gas Valve 3 Off/On Relay 7 W1 Gas Valve 4 Off/On Relay 8 W2 Gas Valve 4 Off/On...
Page 209 APPENDIX B — CCN TABLES (CONT) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS TSTAT Control Mode...: 16-char ASCII Thermostat Y1 Input Off/On forcible Thermostat Y2 Input Off/On forcible Thermostat W1 Input Off/On forcible Thermostat W2 Input Off/On forcible Thermostat G Input...
Page 210 APPENDIX B — CCN TABLES (CONT) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS UOUTPUT2 HEATING Heat Relay 1 Off/On Modulating Heat Capacity HTMG_CAP Heat Relay 2 Off/On Relay 3 W1 Gas Valve 2 Off/On Relay 4 W2 Gas Valve 2 Off/On Relay 5 W1 Gas Valve 3...
Page 211 APPENDIX B — CCN TABLES (CONT) SET POINT TABLE TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT SET_PNT Occupied Heat Setpoint degF OHSP Occupied Cool Setpoint degF OCSP Unoccupied Heat Setpoint degF UHSP Unoccupied Cool Setpoint degF UCSP Heat-Cool Setpoint Gap deltaF HCSP_GAP VAV Occ.
Page 212 APPENDIX B — CCN TABLES (CONT) SERVICE-CONFIG TABLES TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT ACDT_CFG EXV Superheat Deadband deltaF AC_SH_DB Auto-Comp Suct.Pres Drop deltaF AC_SP_DR Auto-Comp DS SP Drop deltaF AC_DS_SP MLV/HGBP DP Drop deltaF AC_MLVDR Low Charge Alert Cutoff deltaF AC_CH_LO High Charge Alert Cutoff...
Page 213 APPENDIX B — CCN TABLES (CONT) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT BP__ (cont) Fan Track Learn Enable No/Yes DCFM_CFG Fan Track Learn Rate mins DCFMRATE Fan Track Initial DCFM DCFMSTRT 2000 Fan Track Max Clamp DCFM_MAX 4000 Fan Track Max Correction...
Page 214 APPENDIX B — CCN TABLES (CONT) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT DEHU (cont) Condenser EXV Max Open COND_MAX LAT Sample Buffer Length LAT_SAMP LAT Sample Rate Seconds secs LAT_RATE DISP Metric Display Off/On DISPUNIT Language Selection LANGUAGE Password Enable...
Page 215 APPENDIX B — CCN TABLES (CONT) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT EDTR EDT Reset Configuration EDRSTCFG Reset Ratio RTIO Reset Limit deltaF LIMT EDT 4-20 ma Reset Input Disable/Enable EDTRSENS Disable EXVS Cir. EXV Start Algorithm EXV_STAL EXV Superheat Setpoint NN.n...
Page 216 APPENDIX B — CCN TABLES (CONT) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT HUMD Humidifier Control Cfg. HUMD_CFG Humidifier Setpoint HUSP Humidifier PID Run Rate secs HUMDRATE Humidifier Prop. Gain HUMID_PG Humidifier Integral Gain HUMID_IG Humidifier Deriv. Gain HUMID_DG Humd Serial Number 1 HUMD_SN1...
Page 217 APPENDIX B — CCN TABLES (CONT) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT SP__ (cont) SP Reset Ratio SPRRATIO SP Reset Limit SPRLIMIT 0.75 SP Reset Econo.Position ECONOSPR Stat.Pres.PID Run Rate secs SPIDRATE Static Press. Prop. Gain STATP_PG Static Press.
Page 218 APPENDIX B — CCN TABLES (CONT) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT UNIT (cont) Startup Delay Time secs DELAY Auxiliary Relay Config AUXRELAY Space Temp Sensor Disable/Enable SPTSENS Disable Space Temp Offset Sensor Disable/Enable SPTOSENS Disable Space Temp Offset Range deltaF...
Page 219 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS ACDTRSLT Calc. Cir A Subcool Temp deltaF CSC_A Cir A Over/Under Charge AC_CHG_A Calc. Cir B Subcool Temp deltaF CSC_B Cir B Over/Under Charge AC_CHG_B EXV A1 Auto-Test Status AC_XA1ST...
Page 220 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS CIR_EXVS (cont) EXV PID Prop. Gain EXV_PG config EXV Integration Time EXV_TI config COMPRSRA Compressor A1 Relay Off/On CMPA1 Compressor A1 Capacity CMPA1CAP Circ A High Press.Switch Low/High...
Page 221 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS COMPTRIP Comp. Security Password COMPPASS config Low Suction Trip Level 1 degF SSTLEV1 Low Suction Trip Level 2 degF SSTLEV2 Low Suction Trip Level 3 degF SSTLEV3 Low Suction Trip Level 4...
Page 222 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS EC_DIAG (cont) DEW - OA Dewpt.lockout? No/Yes DEW_STAT DDBC- OAT > RAT lockout? No/Yes DDBCSTAT OAEC- OA Enth Lockout? No/Yes OAECSTAT DEC - Diff.Enth.Lockout? No/Yes DEC_STAT...
Page 223 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS HUMIDITY Space Relative Humidity SPRH forcible Return Air Rel.Humidity RARH forcible Mixed Air Rel.Humidity MARH forcible Humidifier Relay Off/On HUMIDRLY Humidifier Act.Curr.Pos. HUMDRPOS Humidifier Command Pos.
Page 224 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS OCCDEFME Current Day,Time & Date: 24-char ASCII TIMEDATE Occupancy Controlled By: 24-char ASCII OCDFTXT1 24-char ASCII OCDFTXT2 24-char ASCII OCDFTXT3 Currently Occupied ? No/Yes MODE_OCC 1-char ASCII...
Page 225 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS STRTHOUR Compressor A1 Run Hours hours HR_A1 Compressor A2 Run Hours hours HR_A2 Compressor A3 Run Hours hours HR_A3 Compressor A4 Run Hours hours HR_A4 Compressor B1 Run Hours...
Page 226 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS TESTACTC (cont) Humidifier Act.Ctrl.Ang. HUMDCANG ERV Exh 2 Calibrate Cmd No/Yes MPB6_CAL ERV Exh 2 Act Ctl Angle ERV6CANG TESTCOOL Econ 1 Out Act.Cmd.Pos. ECONCOOL Static Pressure Setpoint in H2O...
Page 227 APPENDIX B — CCN TABLES (CONT) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS VERSIONS (cont) EXV CIR A CESR131172- 5-char ASCII EXV_A_SW EXV CIR B CESR131172- 5-char ASCII EXV_B_SW VFD1 Firmware Version- 5-char ASCII VFD1_SW VFD2 Firmware Version- 5-char ASCII...
Page 228: Appendix C - Unit Staging Tables
APPENDIX C — UNIT STAGING TABLES TIME SCHEDULE CONFIG TABLE Allowable Entries: Day not selected = 0 Day selected = 1 DAY FLAGS OCCUPIED UNOCCUPIED MTWTFSSH TIME TIME Period 1: 00000000 00:00 00:00 Period 2: 00000000 00:00 00:00 Period 3: 00000000 00:00 00:00...
Page 229 APPENDIX C — UNIT STAGING TABLES (CONT) UNIT SIZE P, Q STAGING SEQUENCE (90 AND 105 TON NOMINAL CAPACITY) SEQUENCE STAGE COMP Compressor Status UNIT Total Capacity 100% 100% *Minimum load valve (MLV). MLV is enabled on Circuit A when decreasing from stage 1 to stage 0 to provide an increased stage of capacity. UNIT SIZE P, Q STAGING SEQUENCEWITH DIGITAL COMPRESSOR (90 AND 105 TON NOMINAL CAPACITY) SEQUENCE STAGE...
Page 230: Appendix D - Vfd Information
VFDs, the fan speed is controlled by a 3-phase VFD. The sup- the drive. This can be accomplished by running the Carrier As- ply fan VFD is located in the supply fan section behind an ac- sistant through the VFD keypad (see START-UP WITH THE cess door.
Page 231 APPENDIX D — VFD INFORMATION (CONT) Table B — VFD Parameters Configured by Carrier Assistant PARAMETER GROUP PARAMETER TITLE PARAMETER INDEX HVAC DEFAULT CARRIER DEFAULT Options COMM PROT SEL 9802 NOT SEL (0) LEN (6) EFB PROTOCOL ID 5301 0000 hex...
Page 232 APPENDIX D — VFD INFORMATION (CONT) Table E — VFD ComfortLink Control Variables CCN POINT CCN POINT PARAMETER GROUP PARAMETER TITLE PARAMETER INDEX SUPPLY FAN VFD EXHAUST FAN VFD Actual Signals FB STS WORD 1 VFD1STAT VFD2STAT Not Available SPEED (%) Not Available VFD1_SPD VFD2_SPD...
Page 233 “HVAC press OK (SOFT KEY 2). Default.” c. The Carrier Assistant will ask “Is this a Hi E or Pre- VFD Modes mium E motor?” : The VFD has several different modes for configuring, operat- Hi E ing, and diagnosing the VFD.
Page 234 Parameters 9905, 9906, UP and DOWN keys simultaneously. To restore the default 9907, 9908, 9909, 1605, 1607, 5201, and group 51 parameters factory settings, select the Carrier application macro. and internal motor parameters are not copied. Upload All Parameters...
Page 235 APPENDIX D — VFD INFORMATION (CONT) Download All Parameters change the day, month, and year. Press OK (SOFT KEY 2) to save the configuration and return to the Clock Set menu. To download all parameters from the control panel to the VFD, Use the UP or DOWN keys to highlight DATE FORMAT perform the following procedure: and press SEL (SOFT KEY 2).
Page 236 APPENDIX D — VFD INFORMATION (cont) The fault code on the control panel display is temporary. Press- HISTORY ing the MENU, ENTER, UP, or DOWN buttons removes the For reference, the last 3 fault codes are stored into parameters fault message. The message reappears after a few seconds if 0401, 0412, 0413.
Page 237 UNDERLOAD UNDERLOAD CURVE. THERM FAIL Internal fault. The thermistor measuring the internal temperature of the drive is open or shorted. Contact Carrier. OPEX LINK Internal fault. A communication-related problem has been detected between the OMIO and OINT boards. Contact Carrier.
Page 238 Table I lists the routine maintenance process, fan replacement is recommended once these symptoms intervals recommended by Carrier. start appearing. Replacement fans are available from Carrier. HEAT SINK To replace the main fan for frame sizes R1 through R4, perform the following (see Fig.
Page 239 APPENDIX D — VFD INFORMATION (CONT) Table I — Maintenance Intervals MAINTENANCE INTERVAL Heat Sink Temperature Check and Cleaning Every 6 to 12 months (depending on the dustiness of the environment) Main Cooling Fan Replacement Every 5 years Internal Enclosure Cooling Fan Replacement Every 3 years Capacitor Change (Frame Size R5 and R6) Every 10 years...
Page 240 APPENDIX D — VFD INFORMATION (CONT)
Page 241: Appendix E - Mode Selection Process
APPENDIX E — MODE SELECTION PROCESS The following section is to be used in conjunction with the Mode Selection figure on page 41. To help determine why the unit con- HVAC mode: ("Static Pres.Fail") OFF trols are in a certain mode, the programming logic is provided be- low.
Page 242 APPENDIX E — MODE SELECTION PROCESS (CONT) HVAC mode: ("Off") HVAC mode: ("Vent") — The unit is off and no operating modes are active. — This is a normal operation mode where no heating or cooling is required and outside air is being HVAC mode: ("Tempering Vent") delivered to the space to control IAQ levels.
Page 243 APPENDIX F — BACNET COMMUNICATION OPTION The following section is used to configure the UPC Open con- troller. The UPC Open controller is mounted in a separate en- closure below the main control box. 10's To Address the UPC Open Controller The user must give the UPC Open controller an address that is unique on the BACnet network.
Page 244: Appendix F - Bacnet Communication
See Fig. I, K, and L. The example in Fig. J shows the BAS Port DIP Switches set for 76.8k (Carrier default) and MS/TP. To wire the UPC Open controller to the BAS network: Set the BAS Port DIP Switches DS2 and DS1 for the appropri- 1.
Page 245 APPENDIX F — BACNET COMMUNICATION OPTION (CONT) Fig. L — BT485 Terminator Installation To install a BT485 terminator, push the BT485 terminator on to alternatives. The Halar specification has a higher temperature the BT485 connector located near the BACnet connector. rating and a tougher outer jacket than the SmokeGard specifica- tion, and it is appropriate for use in applications where the user is...
Page 246 APPENDIX F — BACNET COMMUNICATION OPTION (CONT) Table M — Open System Wiring Specifications and Recommended Vendors WIRING SPECIFICATIONS RECOMMENDED VENDORS AND PART NUMBERS Connect Air Contractors Wire Type Description Belden RMCORP International Wire and Cable 22 AWG, single twisted shielded pair, low capacitance, CL2P, TC foam FEP, plenum rated.
Page 247 The UPC Open Element Comm Stat and ComfortLink controls If there are problems wiring or addressing the UPC Open con- must be set to the same CCN Address (Element) number and troller, contact Carrier Technical Support. CCN Bus number. The factory default settings for CCN Ele- COMMUNICATION LEDS ment and CCN Bus number are 1 and 0 respectively.
Page 248 APPENDIX F — BACNET COMMUNICATION OPTION (CONT) NETWORK POINTS LIST READ/ DEFAULT BACNET BACNET TYPE POINT DESCRIPTION CCN POINT NAME UNITS RANGE WRITE VALUE OBJECT ID OBJECT NAME Air Temp Lvg Evap Coil °F AV:11 cct_1 Air Temp Lvg Supply Fan °F AV:10 sat_1...
Page 249 APPENDIX F — BACNET COMMUNICATION OPTION (CONT) NETWORK POINTS LIST (cont) READ/ DEFAULT BACNET BACNET TYPE POINT DESCRIPTION CCN POINT NAME WRITE UNITS RANGE VALUE OBJECT ID OBJECT NAME Element Comm Status BV:2999 element_stat_1 Element Communications Alarm BALM BV:105 comm_lost_alm_1 Emergency Stop EMSTOP 0 to 1...
Page 250 APPENDIX F — BACNET COMMUNICATION OPTION (CONT) NETWORK POINTS LIST (cont) READ/ DEFAULT BACNET BACNET TYPE POINT DESCRIPTION CCN POINT NAME WRITE UNITS RANGE VALUE OBJECT ID OBJECT NAME Setpoint / Heating Unoccupied Setpoint Setpoint Adjustment Enable STPT_ADJ_ENABLE BV:6 stpt_adj_enable_1 SP High Alert Limit 0 to 5 AV:73...
Page 251 LEGEND BALM — BACnet Alarm — BACnet Analog Value (UPC) — Building Pressure CALM — Carrier Alarm — Carrier Analog Point (MBB) — Carrier Binary Point — Dry Bulb Changeover — Demand Controlled Ventilation DDBC — Differential Dry Bulb Changeover —...
Page 252: Appendix G - Optional Motormaster
APPENDIX G — OPTIONAL MOTORMASTER ® V CONTROL GENERAL START-UP This appendix contains instructions for the start-up and service The Motormaster V electronic control will be powered up as of the optional Motormaster V (MMV) control on 48/50N 75 long as unit voltage is present. When the system calls for cool- to 150-ton units.
Page 253 MODE. The Motormaster V control is now restored It is strongly recommended that the user NOT change any to factory settings. programming without consulting Carrier service personnel. Unit damage may occur from improper programming. TROUBLESHOOTING TO ENTER PASSWORD AND CHANGE PROGRAM VALUES: Troubleshooting the Motormaster V control requires a combina- 1.
Page 254 DESCRIPTION MODE 1 MODE 2 MODE 4 Line Voltage: 01 = low line, 02 = high line Carrier Freq: 01 = 4 kHz, 02 = 6 kHz, 03 = 8 kHz Startup mode: flying restart Stop mode: coast to stop...
Page 255 Consult factory. problem. Restore factory defaults by toggling P48 to another mode. Then set P48 to desired mode User data and Carrier defaults in the EPM Data Fault Manual to restore all defaults for that mode. See Drive are corrupted.
Page 256: Index
Basic control usage Indoor air quality control Two-stage gas and electric heat control Building pressure control Indoor air quality configurations Unit configuration (unit) submenu Carrier Comfort Network (CCN) Internal wiring Unit preparation ® CCN tables and display Liquid line service valve...
Page 257 Pre-Start-Up Checklist for 48/50N-Series Packaged Rooftop (Remove and use for job file) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sec- tions of this Controls, Start-Up, Operation, Service and Trouble- shooting document.
Page 258 Verify routing and installation of field control wiring per installation instructions  Verify proper connection of optional CCN or BACnet wiring per installation instructions  (Temporarily disconnect this wiring for start-up; reconnect once unit is started) Verify proper installation of plenum rated pneumatic pressure tubing to building pressure and supply fan static pressure transducers ...
Page 259 Start-Up Checklist for 48/50N-Series Packaged Rooftop (Remove and use for Job File) I. Project Information Job Name __________________________________________________________________________________________________ Address ____________________________________________________________________________________________________ City ___________________________________________________________ State ____________________ Zip ______________ Installing Contractor Name ___________________________________________________ Phone ___________________________ Equipment tag / Mark for ______________________________________________________________________________________ Sales Office _________________________________________________________________________________________________ Prestart-up Performed by (Name) _______________________________________________ Phone __________________________ Unit Model (18 Chars) ____________________________________________ Serial (10 Chars) ____________________________ Design Information...
Page 260 Temperatures / Pressures (Record information from the Pressures and Temperatures modes when unit is in a stable operating condition.) Supply Air Temperature - Cooling ___________ F Gas Heating Supply Air Temperature ___________ F (48N only) Electric Heating Supply Air Temperature ___________ F (50N only, if equipped) Hydronic Heating Supply Air Temperature ___________ F (50N only, if equipped)
Page 261: Controls Set Point And Configuration Log
CONTROLS SET POINT AND CONFIGURATION LOG MODEL NUMBER: Software Version SERIAL NUMBER: CESR131461-- DATE: CESR131465-- TECHNICIAN: CESR131465-- NAVI CESR130227-- CESR131226-- CESR131174-- CESR131173-- CESR131172-- EXVA CESR131172-- EXVB CESR131172-- ITEM EXPANSION RANGE DEFAULT SETTING UNIT UNIT CONFIGURATION C.TYP Machine Control Type 1 to 4 (multi-text strings) SIZE Unit Size (75 - 150) 75 to 150...
Page 262 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING M.PID MOTORMASTER PID CONFIGS MM.RR Motor Master PI Run Rate 5 to 120 sec MM.PG Motor Master Prop. Gain 0 to 5 MM.PD Motor Master Deriv. Gain 0 to 5 MM.TI Motor Master Integ.
Page 263 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING HEAT (CONT) HEATING CONFIGURATION SG.CF (CONT) STAGED HEAT CONFIGS SW.H.T Limit Switch High Temp 80 to 210 dF 170* SW.L.T Limit Switch Low Temp 80 to 210 dF 160* HT.P Heat Control Prop.
Page 264 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING E.CFG (CONT) ECON.OPERATION CONFIGS E.DBD Economizer Deadband 0.1 to 2 ^F UEFC UNOCC.ECON.FREE COOLING FC.CF Unoc Econ Free Cool Cfg 0 to 2 (multi-text strings) FC.TM Unoc Econ Free Cool Time 0 to 720 min FC.L.O Un.Ec.Free Cool OAT Lock...
Page 265 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING D.LV.T COOL/HEAT SETPT. OFFSETS L.H.ON Dmd Level Lo Heat ON 0 to 2 ^F H.H.ON Dmd Level(+) Hi Heat ON 0.5 to 20 ^F L.H.OF Dmd Level(-) Lo Heat OFF 0.5 to 2 ^F L.C.ON Dmd Level Lo Cool ON...
Page 266 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING DEHU (CONT) DEHUMIDIFICATION CONFIG. DH.TG Dehum Discrete Timeguard 10-90 HZ.RT HumidiMizer Adjust Rate 5 to 120 sec HZ.PG HumidiMizer Prop. Gain 0 to 10 CCN CONFIGURATION CCN.A CCN Address 1 to 239 CCN.B CCN Bus Number...
Page 267 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING SW.LG (CONT) DH.LG Dehumidify Sw. - Off Open/Close Open SFB.L SF Bypass Sw. - Off Open/Close Open PEB.L PE Bypass Sw. - Off Open/Close Open DISP DISPLAY CONFIGURATION TEST Test Display LEDs Off/On...
Page 268 © 2020 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480165-01 Printed in U.S.A. Form 48-50N-7T Pg CL-12 12-2020 Replaces: 48-50N-6T...

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Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting

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