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

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

Packaged rooftop cooling units with gas heat, optional electric heat, or hydronic heat and comfortlink controls
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See also: Instruction and Installation Manual
Controls, Start-Up, Operation,
Service and Troubleshooting
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .2,3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3,4
BASIC CONTROL USAGE . . . . . . . . . . . . . . . . . . . . . . .4,5
ComfortLink Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Navigator™ Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Conventions Used in this Manual . . . . . . . . . . . . . . . . 5
System Pilot™ Interface. . . . . . . . . . . . . . . . . . . . . . . . . . 5
CCN Tables and Display. . . . . . . . . . . . . . . . . . . . . . . . . . 5
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Unit Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Accessory Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Crankcase Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Evaporator Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Gas Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CONTROLS QUICK START . . . . . . . . . . . . . . . . . . . 27-29
Multi-Stage Constant Volume and Staged Air
Economizer Configurations . . . . . . . . . . . . . . . . . . . . . 27
Indoor Air Quality Configurations . . . . . . . . . . . . . . . 28
Exhaust Configurations . . . . . . . . . . . . . . . . . . . . . . . . . 28
Set Clock on VFD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Programming Operating Schedules . . . . . . . . . . . . . 29
SERVICE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-33
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Service Test Mode Logic . . . . . . . . . . . . . . . . . . . . . . . . 29
Independent Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
System . . . . . . . . . . . . . . . . . . . . . . . . . . 32
®
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SERVICE COMPONENT TESTS . . . . . . . . . . . . . . . 33-39
THIRD PARTY CONTROL . . . . . . . . . . . . . . . . . . . . . 39-41
Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Alarm Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Remote Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
VFD Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Supply Air Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Demand Limit Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
CONTROLS OPERATION . . . . . . . . . . . . . . . . . . . . . 41-97
Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480114-01
Packaged Rooftop Cooling Units with Gas Heat, Optional
Electric Heat, or Hydronic Heat and ComfortLink Controls
Page
Printed in U.S.A.
Form 48/50N-2T
48/50N2,N3,N4,N5,N6,N7,N8,N9
Unit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Cooling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
• SUMZ COOLING ALGORITM
• DEMAND LIMIT CONTROL
• HEAD PRESSURE CONTROL
Heating Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Static Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . 69
Fan Status Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . 72
• GENERAL
• SETTING UP THE SYSTEM
• SUPPLY FAN STATUS MONITORING LOGIC
Dirty Filter Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
NOSTICS (FDD) CONTROL
• UNOCCUPIED ECONOMIZER FREE COOLING
Building Pressure Control. . . . . . . . . . . . . . . . . . . . . . . 80
Smoke Control Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Pg 1
WeatherExpert
Version 2.x
Page
7-14
Replaces: 48/50N-1T
™

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Summary of Contents for Carrier WeatherExpert 48N2

  • Page 1: Table Of Contents

    ™ WeatherExpert 48/50N2,N3,N4,N5,N6,N7,N8,N9 Packaged Rooftop Cooling Units with Gas Heat, Optional Electric Heat, or Hydronic Heat and ComfortLink Controls Version 2.x Controls, Start-Up, Operation, Service and Troubleshooting Page CONTENTS Unit Configuration ......44 Page Cooling Control .

  • Page 2: Safety Considerations

    UNIT START-UP CHECKLIST ....CL-8 (CCN)....91 Carrier Comfort Network ®...

  • Page 3: General

    GENERAL Navigator™ device, or through the Carrier Comfort Network ® (CCN) using ComfortVIEW™ software, Network Service This book contains Start-Up, Controls, Operation, Trouble- Tool, or other CCN device.

  • Page 4: Basic Control Usage

    LED next to each mode listed on the face of the display. The ComfortLink controller is cable-ready for connection to When a specific mode or sub-mode is located, push the the Carrier Comfort Network ® (CCN) building management system. The control provides high-speed communications for ENTER key to enter the mode.

  • Page 5: Conventions Used In This Manual

    Ensure that all electrical connections Internal Wiring — face (33PILOT-01) is a component of the Carrier 3V™ system in the control box are tightened as required. If the unit has mod- and can serve as a CCN user-interface and configuration tool.

  • Page 6: Accessory Installation

    2. Enter unit set points. The unit is shipped with the set point Check to make sure that all Accessory Installation — default values. If a different set point is required, use the accessories including space thermostats and sensors have been Navigator™...
  • Page 7 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 Time of Day System Currently Run Status (TEST) Temperatures...
  • 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) 8.13 8.86 9.61 10.37 11.14 24,000 12.01 12.85 13.70 14.56 15.43 28,000 16.95 1008 17.89 1026 18.85 1043 19.81 1059...
  • 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) 4.78 5.82 6.86 7.92 8.98 24,000 6.84 7.99 9.14 10.30 11.48 28,000 8.07 9.26 10.47 11.69 12.91 32,000 10.94 12.24...
  • 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) 10.40 11.19 12.00 12.82 13.65 26,000 15.00 15.90 16.81 1005 17.73 1022 18.67 30,000 1060 20.74 1076 21.75 1092...
  • 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) 6.23 7.34 8.46 9.60 10.73 26,000 8.75 9.98 11.22 12.46 13.71 30,000 10.24 11.53 12.82 14.11 15.42 34,000 11.89...
  • 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) 2.09 2.54 3.02 3.52 4.04 15,000 3.38 3.91 4.46 5.03 5.62 18,000 5.15 5.76 6.38 7.03 7.69 21,000 7.49 8.17...
  • 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) 1.50 1.98 2.50 3.04 3.61 15,000 2.36 2.91 3.50 4.11 4.75 18,000 3.52 4.15 4.81 5.50 6.21 21,000 5.03 5.74...
  • 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) 1.19 1.69 2.23 2.80 3.41 15,000 1.82 2.38 2.99 3.63 4.31 18,000 2.65 3.30 3.97 4.69 5.43 21,000 3.75 4.47...
  • 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) 2.40 3.15 3.96 4.82 5.73 24,000 3.51 4.36 5.25 6.21 7.20 28,000 4.19 5.08 6.03 7.02 8.06 30,000 4.95 5.90...
  • 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 — 4/508N 75-105 Nominal Ton Units High-Static Power Exhaust Fan Data AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 1.91 3.01 4.17 5.43 6.75 15,000 2.74 4.03 5.36 6.75 8.22 18,000 3.82 5.30 6.82 8.38 9.99 21,000 5.19...
  • 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) 3.13 5.10 6.96 8.78 10.57 24,000 4.07 6.47 8.71 10.87 13.00 28,000 4.60 7.22 9.65 12.01 14.31 30,000 5.17...
  • 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 BkW — Brake Kilowatts utilized with confidence. Using fan motors up to the horsepower ODP —...

  • Page 27: Controls Quick Start

    CONTROLS QUICK START Multi-Stage Constant Volume and Staged Air Volume Units with Mechanical Thermostat — The following section will provide a quick user guide to set- To configure the unit, perform the following: ting up and configuring the N Series units with ComfortLink ...

  • Page 28: Indoor Air Quality Configurations

      Under Configuration FAN.T the following config- UEFC Unoccupied Economizer Free Cooling urations may be adjusted: ACT.C Economizer Actuator Config FT.CF Fan Track Learn Enable (see note below)   Configuration ECON EC.MN should always be set for FT.TM Fan Track Learn Rate (see note below, not the minimum damper position.

  • Page 29: Programming Operating Schedules

    (SOFT KEY 2) to save the configuration and return to the SERVICE TEST Clock Set menu. The units are equipped with a Service Test fea- General — 8. Press EXIT (SOFT KEY 1) twice to return to the main ture, which is intended to allow a service person to force the menu.
  • Page 30 Table 23 — Service Test ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS TEST Service Test Mode ON/OFF MAN_CTRL STOP Local Machine Disable YES/NO UNITSTOP S.STP Soft Stop Request YES/NO SOFTSTOP FAN.F Supply Fan Request YES/NO SFANFORC INDP TEST INDEPENDENT OUTPUTS HUM.R Humidifier Relay ON/OFF...
  • Page 31 Table 23 — Service Test (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS HEAT TEST HEATING HT.ST Requested Heat Stage 0-15 HTST_TST HT.1 Heat Relay 1 ON/OFF HS1_TST H1.CP Modulating Heat Capacity 0-100 MGAS_TST HT.2 Heat Relay 2 ON/OFF HS2_TST HT.3 Relay 3 W1 Gas Valve 2...

  • Page 32: Actuators

    actual valve position at any time, the user can use the Outputs In the AC.T.C sub-menu, it will be possible Actuators —   menu (Outputs COOL B.EXV). to control and calibrate actuators. Calibration is a mode in which the actuator moves from 0% to the point at which the ...

  • Page 33: Heating

      • Service Test COOL RHV (Humidi-MiZer 3-Way individually control the heat relays, including the heat Valve). On Humidi-MiZer equipped units, this item interlock relay.   allows the user to switch the reheat valve from ON to • Service Test HEAT H1.CP (Modulating Heat Capac- OFF and vice versa.
  • Page 34 For each auto-component test, the following information is If a compressor is commanded OFF and the corresponding grouped in one screen: test status, component status, and values CSB indicates ON, a "Compressor Stuck" alarm will be of response parameters. logged: Auto-Component Test Control...
  • Page 35 If SP.AV is verified to change properly at 50% and 100% The test screen will display the following: capacity, then DS.ST= PASS, otherwise DS.ST=FAIL. CD.TS Run Chrg Test without Lqd Sen The EXV auto-com- EXV Auto-Component Test — CD.ET Running Test Status and Timer ponent test requires the following conditions: SCT.A...
  • Page 36 3. Stage all A and B circuit compressors ON. filter Filter Drier Auto-Component Test — drier auto-component test requires the following conditions: 4. Wait 5 minutes. 1. Unit is not shut down due to failure (A152). 5. Calculate CHG.A (0 lb indicates proper charge, 0.5 lb in- dicates 0.5 lb of over charge, and -0.5 lb indicates 0.5 lb 2.
  • Page 37 The test screen will display this: a48-8787 SF.TS Run Supply Fan Auto-Test SF.DT Running Test Status and Timer y = 0.0003x + 0.0985x - 10.336x + 389.27 S.VFD VFD1 Actual Speed % = 0.997 S.PWR 0.00 kW VFD1 Actual Motor Power ∆P cond A 0.00˝...
  • Page 38 After letting the power exhaust run and stabilize for 5 min- The condenser fans auto-component test functions by com- utes, the control will verify E.PWR has increased and BP is manding to ON all compressors and outdoor fans and verify within BPSP ±...

  • Page 39: Third Party Control

    Setting EC.TS=ON will perform the following: The alarm output is 24-v at TB201-X Alarm Output — and TB201-C. The contact will provide relay closure whenever 1. Command S.VFD to STATPMIN. the unit is under an alert or alarm condition (5 va maximum). 2.

  • Page 40: Economizer/Outdoor Air Damper Control

    In either case, it will be necessary to install a controls expan- air cfm can be read, the economizer will move to the Econo- sion module (CEM). The control interfaces to a switch input at mizer Minimum Flow CFM control setting. TB202-10 and TB202-11.

  • Page 41: Controls Operation

    NOTE: If D.F.ON is configured below DAQ.H, the unit is in Currently Occupied (OCC) — This variable displays the cur- occupied mode, and the fan was off, then DAQ rose above rent occupancy state of the unit. D.F.ON and the fan came on, the economizer will go to the Timed Override in Effect (T.OVR) —...

  • Page 42: Hvac Modes

    6. Emergency Stop, which is forced over the CCN through HVAC Mode — TEMPERING VENT (10) — The econo- the Emergency Stop Variable (EMSTOP). mizer is at minimum vent position but the supply-air tempera- ture has dropped below the tempering vent set point. Staged (“CCN Emergency Stop”) gas heat, modulating gas heat, SCR electric heat, or hydronic 7.
  • Page 43 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 44: Unit Configuration

    HVAC Mode — FREEZESTAT TRIP (25) — If the freeze- • C.TYP = 4 (SPT - MULTI ) stat trips, the unit enters the Freezestat Trip HVAC mode. The This configuration will force the control to monitor a supply fan will run, the hydronic heat valve will be wide open, space temperature sensor to make a determination of and the economizer damper will be closed.
  • Page 45   Configuration SP.RS = 1 (Static Pressure Reset us- VAV Unoccupied Fan Retry Time (VAV.S) — Machine con- ing 4-20ma sensor) trol types 1 and 2 (VAV-RAT,VAV-SPT) include a process for sampling the return-air temperature during unoccupied periods  ...

  • Page 46: Cooling Control

    during the occupied state. If AUX.R is set to 3, the auxiliary re- operation. The control will be able to call out a LOW lay will energize when the supply fan is energized (and, if COOL or a HIGH COOL mode and maintain a low or high equipped with a VFD, the VFD output is not 0%).
  • Page 47 COOLING CONFIGURATION — Relevant configurations for Normally this configuration should not require any tuning mechanical cooling are located at the local display under or adjustment. If there is an application where the unit may be  Configuration COOL. See Table 29. significantly oversized and there are indications of high com- pressor cycles, then the Capacity Threshold Adjust (Z.GN) can Enable Compressor A1 (A1.EN) —...
  • Page 48 compressor will be controlled by the compressor staging rou- decrease in digital scroll capacity. An increase in capacity will tine and SUMZ Cooling Algorithm. continue to follow the values defined by Configura-     tion M.PID DS.AP and Configuration M.PID DS.AD.

  • Page 49: Cooling Configuration

    Table 29 — Cooling Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT COOL COOLING CONFIGURATION A1.EN Enable Compressor A1 Enable/Disable CMPA1ENA Enable A2.EN Enable Compressor A2 Enable/Disable CMPA2ENA Enable A3.EN Enable Compressor A3 Enable/Disable CMPA3ENA Enable A4.EN Enable Compressor A4 Enable/Disable CMPA4ENA Enable...

  • Page 50: Cool Mode Selection Process

    Boards are used to help detect a High Pressure Switch trip. Set- NOTE: There is a sub-menu at the local display (Run Status  ting this configuration to NO disables this additional High TRIP) that allows the user to see the exact trip points for Pressure switch trip detection.
  • 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 -1 - 2 DMDLHON H.H.ON Dmd Level(+) Hi Heat On 0.5 - 20.0 DMDHHON L.H.OF Dmd Level(-) Lo Heat Off 0.5 - 2.0 DMDLHOFF...

  • Page 52: Cool Mode Diagnostic Help

    • The control will utilize the SumZ cooling algorithm and Active Demand Limit (DEM.L) — If demand limit is active, control cooling to a supply air set point. See the section this variable will represent the amount of capacity that the for the SumZ Cooling Algorithm section for information control is currently limited to.
  • Page 53 Table 32 — Run Status Cool Display ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS COOL COOLING INFORMATION C.CAP Current Running Capacity CAPTOTAL CUR.S Current Cool Stage COOL_STG REQ.S Requested Cool Stage CL_STAGE MAX.S Maximum Cool Stages CLMAXSTG DEM.L Active Demand Limit DEM_LIM forcible SUMZ...
  • Page 54 SumZ Operation — The SumZ algorithm is an adaptive PID • If “SUM” rises above Z.PLU, a cooling stage is added. style of control. The PID (proportional, integral, derivative) is • If “SUM” falls below Z.MIN, a cooling stage is subtracted. programmed within the control and the relative speed of stag- There is a variable called SMZ which is described in the ing can only be influenced by the user through the adjustment...
  • Page 55 remove a cooling stage and open up the economizer further to 4-20 mA Demand Limiting (DM.L.S = 2) — If the unit has make up the difference. been configured for 4 to 20 mA demand limiting, then the   Inputs 4-20 DML.M value is used to determine the...
  • Page 56 There are up to four outputs provided to control head The condenser fan output controls outdoor fan contactors pressure: and outdoor fans for each unit tonnage as shown in Fig. 10. Each stage of fans is also shown. The ComfortLink controller ...
  • Page 57 a48-8696...
  • Page 58 a48-8697...
  • Page 59 a48-8699...
  • Page 60 a48-8700...

  • Page 61: Economizer Integration With Mechanical Cooling

    When a condenser fan output is common to both refrigera- command the terminals to open to their Heating Open posi- tion circuits, in other words when the fan(s) will affect both cir- tions. The HIR is energized whenever the Heating mode is ac- cuit A and circuit B, the following logic is used: in order to add tive, an IAQ pre-occupied force is active, or if fire smoke a fan stage, the SCT of either circuit must be above SCT.H for...

  • Page 62: Heat Mode Selection Process

    Table 34 — Heating Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT HEAT HEATING CONFIGURATION HT.CF Heating Control Type 0 - 5 HEATTYPE HT.SP Heating Supply Air Setpt 80 - 120 SASPHEAT OC.EN Occupied Heating Enabled Yes/No HTOCCENA LAT.M MBB Sensor Heat Relocate Yes/No HTLATMON SG.CF...

  • Page 63: Heat Mode Diagnostic Help

    HEAT MODE DIAGNOSTIC HELP — To quickly deter- mine the current trip points for the low and high heat modes, HEATING SET POINT there is a menu in the local display which lets the user quickly 68.0 F view the state of the system. This menu also contains the cool 67.5 F L.H.ON trip points as well.

  • Page 64: Modulating Gas Heating Control

    This section will focus on NOTE: The PID values should be not be modified without heat mode control, which ultimately is relevant to tempering, approval from Carrier. minus the consideration of the supply air heating control point. ...
  • Page 65 LOW HEAT. NOTE: The PID values should not be modified without Heat Control Derv. Gain (HT.D) — This configuration is the approval from Carrier. derivative term for the PID which runs in the HVAC mode LOW HEAT. IMPORTANT: When gas or electric heat is used in a VAV Heat PID Rate Config (HT.TM) —...
  • Page 66 the modulating gas section capacity is a function of the capaci- maximum number stages possible (Run Sta- ty desired, the available heat staging patterns configured with tus→VIEW→H.MAX). See Tables 39- 42. heat stage type (HT.ST), and the capacity range presented by SCR Electric Heat Staging —...

  • Page 67: Control Board Information

    Table 42 — Modulating Gas Heat Control Steps (HT.ST = 3) RELAY OUTPUT CAPACITY Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 6 Heat 7 Heat 8 Heat 9 Heat 10 STAGE MBB-RLY8 TR1-CR SCB-RLY1 SCB-RLY2 SCB-RLY3 SCB-RLY4 MBB-RLY9 MBB-RLY10 CXB-RLY1 CXB-RLY2 IGC1 MGV1 IGC2...

  • Page 68: Relocate Sat For Heating-Linkage Applications

    Installing a New Sensor — Procure a duct-mount temperature the duration of Timer no. 2, the boards determine which state to sensor (Carrier P/N 33ZCSENPAT or equivalent 10,000 ohm adjust the capacity output to satisfy the heat demand. When at 25C NTC [negative temperature coefficient] sensor). Install Timer no.

  • Page 69: Tempering Mode

    TEMPERING MODE — In a vent or cooling mode, the in a heat mode. More information regarding the operation of economizer at minimum position may send extremely cold heating can be referenced in the Heating Control section. outside air down the ductwork of the building. Therefore it Recovery from a tempering mode (MODETEMP) will may be necessary to bring heat on to counter-effect this low occur when the EDT rises above the trip point.

  • Page 70: Related Points

    VFD Minimum Speed (SP.MN) — This is the minimum the control PID factors will not require any adjustment and the speed for the supply fan VFD. Typically the value is chosen to factory defaults should be used. If persistent static pressure maintain a minimum level of ventilation.

  • Page 71: Static Pressure Reset

    STATIC PRESSURE RESET load conditions. It will always be the lowest value under the given conditions, and as the conditions and airflow set point at CCN Linkage — The ComfortLink controls supports the use each terminal change throughout the operating period, and so of static pressure reset.

  • Page 72: Fan Status Monitoring

       FLTC FS.FT the range is between 0 and 10 min- Fan Status Monitoring utes. The default for this parameter is 2 minutes. GENERAL — The N Series ComfortLink controls offer the Filter types (MF_TYP, PF_TYP) and final resistance capability to detect a failed supply fan through either a duct (MF_FR, PF_FR) are used for the Delta Pressure and Predic- static pressure transducer or an accessory discrete switch.

  • Page 73: Economizer

    2 = Schedule — Filter configuration for either main or post fil- 5 = Predictive Life (Calculate only) — Once the control has ter can be set to 2 (Schedule). In this mode the filter status is learned the life of the filter it is possible to set the control to use based on a schedule set by the user.

  • Page 74: Differential Dry Bulb Cutoff Control

    The control shall test for a mechanically disconnected damper after EC_FLTMR seconds, a "damper stuck or jammed" if all the following conditions are true: alert shall logged, i.e. abs(ECONxPOS ECONODMD) > EC_FLGAP for a continuous time 1. An economizer is installed. period EC_FLTMR seconds.

  • Page 75: Fdd Configurations

    It shall be possible to manually start the self-test: 7. Repeat Steps 1-5 for additional actuator/damper assem- • In Navigator display, this test shall be located at Service blies.   Test AC.DT EC.TS. 8. Command actuators/dampers to "normal" positions. •...

  • Page 76: Setting Up The System

    before trusting the SAT reading, and has been reused for Title control algorithm used for multiple stages of compression. The 24 purposes. configuration option, E.TRM is typically set to Yes, and allows the economizer to modulate to the same control point "Sum Z" Economizer Deadband Temp (AC.EC) —...

  • Page 77: Outdoor Air Cfm Control

    Table 54 — Economizer Configuration Table ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT EC.EN Economizer Installed? Yes/No ECON_ENA EC.MN Economizer Min.Position 0 - 100 ECONOMIN EC.MX Economizer Max.Position 0 - 100 ECONOMAX E.TRM Economzr Trim For SumZ ? Yes/No ECONTRIM E.SEL Econ ChangeOver Select 0 - 3...
  • Page 78 Economizer Changeover Select — The control is capable of the enthalpy of the outdoor and return air. An accessory out- performing any one of the following changeover types in addi- door air humidity sensor (ORH.S) and return air humidity sen- tion to both the dry bulb lockout and the discrete switch input: sor (RRH.S) are used.

  • Page 79: Economizer Operation Configurations

    Control Angle Alarm Configuration — The economizer ac- • Outside air temperature sensor healthy tuator learns what its end stops are though a calibration at the • The economizer would be allowed to cool if the fan were factory. Field-installed actuators may be calibrated in the Ser- requested and in a cool mode.

  • Page 80: Economizer Diagnostic Help

    Table 55 — Economizer Run Status Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS EC1.P Economizer 1 Out Act. Curr. Pos. 0-100 ECONOPOS EC2.P Economizer 2 Ret. Act.Curr.Pos. 0-100 ECON2POS EC3.P Economizer 3 Out Act.Curr.Pos. 0-100 ECON3POS ECN.C Economizer Out Act.Cmd.Pos. 0-100 ECONOCMD forcible...
  • Page 81 Table 56 — Building Pressure Control Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS BUILDING PRESSURE CONFIGURATIONS BP.CF Building Pressure Configuration 0 - 3 BLDG_CFG BP.S Building Pressure Sensor Enable/Disable BPSENS Disable* BP.R Building Pressure (+/-) Range 0.10 - 0.25 BP_Range 0.25 Building Pressure Setp.

  • Page 82: Smoke Control Modes

      (Pressures AIR.P BP) rises above the building pressure set board (CEM). The Fire Shutdown input is located on the main point (BP.SP) and the supply fan is on, then building pressure base board (MBB) on terminals TB201-1 and 2. The unit may control is initialized.

  • Page 83: Indoor Air Quality Control

    The configurable fire speed override for exhaust VFD/actuator The OAQ reference level can be set using the OAQ Reference    is in Configuration B.V.A BP.FS. Set Point (OAQ.U). When the differential between IAQ and OAQ reaches the configurable Diff. Air Quality Hi Limit The exhaust fan VFD’s commanded speed can be found in (DAQ.H), then the economizer position will be EC.MN.
  • Page 84   off) only during the occupied period (CV operation with IAQ Discrete Input Config (Configuration AQ.CF  automatic fan). IQ.I.C) — This configuration is used to set the type of IAQ • IQ.A.F = 2 (Fan On Occupied/Unoccupied) — IAQ sensor.

  • Page 85: Pre-Occupancy Purge

      IAQ.P IQ.P.L) non-Carrier IAQ sensor that may have a different characteristic curve. It represents the CO level at 4 mA. If neither of the above are true then the dampers will be positioned to the IAQ Purge HI Temp Min Pos (Configuration ...

  • Page 86: Humidification

    If a humidifier using a proportional steam valve is selected, unique serial number. The rooftop control uses this serial the Carrier actuator (Carrier Part No. HF23BJ050) must be number to communicate with the actuator. The actuator serial adapted to the humidifier manufacturer’s steam valve. Contact...

  • Page 87: Dehumidification And Reheat

    Table 58 — Humidity Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT HUMD HUMIDITY CONFIGURATION HM.CF Humidifier Control Cfg. 0 - 4 HUMD_CFG HM.SP Humidifier Setpoint 0 - 100 HUSP H.PID HUMIDIFIER PID CONFIGS HM.TM Humidifier PID Run Rate 10 - 120 HUMDRATE HM.P Humidifier Prop.

  • Page 88: Humidi-Mizer

       OPERATION — Dehumidification and reheat can only occur Configuration DEHU D.SEL = 1 and Con-   if the unit is equipped with either staged gas or hydronic heat. figuration HEAT HT.CF = staged gas or hot water Dehumidification without reheat can be done on any unit but valve, then the selected heating control type will operate ...

  • Page 89: Operation

    Vent Reheat Set Point Select (D.V.CF) — This configuration the space, the outdoor and/or space humidity levels may have determines how the vent reheat set point is selected. This set risen. A typical scenario might be when the outside air is 85 F point becomes the supply air set point when the Humidi-MiZer and 70 to 80% relative humidity (RH).

  • Page 90: Temperature Compensated Start Logic

    required for ASHRAE (American Society of Heating, Refrig- TCST-Heat Factor (TCS.H) — This is the factor for the start erating, and Air-Conditioning Engineers) 90.1 compliance. A time bias equation for heating. space sensor is required for non-linkage applications. NOTE: Temperature compensated start is disabled when these SETTING UP THE SYSTEM —...

  • Page 91: Carrier Comfort Network

    ComfortLink controls to participate as an ele- number of hours left in an override. It is possible to cancel an ment of the Carrier Comfort Network (CCN) system directly override in progress by writing “0” to this variable, thereby from the local display.
  • Page 92 EDT High Alert Limit/Occ (SA.H.O) — If the space temper- Alert Limit (RA.L.U), then Alert 304 will be generated. Unit ature is above the configurable occupied EDT High Alert Limit operation will continue but VAV heating operation will be dis- (SA.H.O), then Alert 303 will be generated and heating opera- abled.

  • Page 93: Sensor Trim Configuration

    This is used when field-supplied product warranty. switches or input devices are used instead of Carrier devices. The normally open or normally closed setting may be different on a Air Temperature Leaving Supply Fan Sensor (SAT.T) — This field-supplied device.

  • Page 94: Display Configuration

    Table 63 — Sensor Trim Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT TRIM SENSOR TRIM CONFIG. SAT.T Air Temp Lvg SF Trim -10 - 10 SAT_TRIM RAT.T RAT Trim -10 - 10 RAT_TRIM OAT.T OAT Trim -10 - 10 OAT_TRIM SPT.T SPT Trim...

  • Page 95: Vfd Configurations

    Password Enable (PAS.E) — This variable enables or dis- VFD1 Nominal Motor HPwr (N.PWR) — This configura- ables the use of a password. The password is used to restrict tion defines the nominal motor power. This value must equal use of the control to change configurations. the value on the motor rating plate.

  • Page 96: Remote Control Switch Input

    VFD2 Type (TYPE) — This configuration sets the type of Table 68 — Optional VFD Power Exhaust (PE) VFD communication. This configuration should not be Motor Limitations (FLA) changed without first consulting a Carrier service engineering representative. Power UNIT VOLTAGE...

  • Page 97: Hot Gas Bypass

    Table 70 — Remote Switch Logic Configuration REMOTE REMOTE SWITCH CONFIGURATION (RM.CF) SWITCH LOGIC SWITCH REMOTE INPUT STATE CONFIGURATION STATUS (REMT) No Remote Switch Occ-Unocc Switch Start/Stop Override (RMI.L) OPEN OFF (0) xxxxx Unoccupied Start No Override OPEN CLOSED ON (1) xxxxx Occupied Stop...
  • Page 98 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 99: Troubleshooting

    DAYLIGHT SAVINGS STOP (DS.SP) — This submenu con- must be reset before the circuit can operate in either Normal figures the end date and time for daylight savings. mode or Service Test mode.  Daylight Savings Stop Month (DS.SP SP.MN) — This is Use the unit ®...
  • Page 100 Table 72 — Cooling Service Analysis PROBLEM CAUSE REMEDY Compressor and Fan Will Not Power failure. Check power source. Call power company. Start. Fuse blown or circuit breaker tripped. Check fuses Replace fuse or reset circuit breaker. and circuit breakers in power and control panels. Disconnect off.
  • Page 101 Table 73 — Humidi-MiZer ® Service Analysis PROBLEM CAUSE REMEDY Circuit B compressors unavailable Check alarm history for general cooling mode operation problems. See Table 72. 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 Humidi-MiZer relative humidity sensor appropriate sensor is configured in the unit software, (Configura-...

  • Page 102: Transducer Troubleshooting

    Table 73 — Humidi-MiZer Service Analysis (cont) PROBLEM CAUSE REMEDY Supply air set point for cooling is too Check the unit supply air set point for cooling operation. This is the high/low temperature that the valves will modulate to meet during a dehu- midification mode.
  • Page 103 Table 74 — Gas Heating Service Analysis PROBLEM CAUSE REMEDY Burners Will Not Ignite. 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.
  • Page 104 Table 76 — 10K Thermistor vs Resistance (T55, T56, T58, OAT, RAT, EDT, LAT 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 –21 171,079...
  • Page 105 Table 77 — 10K Thermistor vs Resistance (T55, T56, T58, OAT, RAT, EDT, LAT 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 –28 156,404...
  • Page 106 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 7,665 1,165 –24 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 107 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 7,499 1,118 –31 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 108 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 109 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 110 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 111 24 VOLTS DEFECTIVE 1 FLASH - INDOOR FAN DELAY BETWEEN FLASHING LED is IGC BOARD MODIFIED (HEATING) R & C ON J2? 2 FLASHES - OPENING OF LIMIT SWITCH 1. BLOWN 5 AMP FUSE 3 FLASHES - FLAME SENSOR 2. DEFECTIVE 24V TRANS. INDICATES FLAME WITH 3.

  • Page 112: Auto View Of Run Status

    Table 83 — Auto View of Run Status Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS VIEW AUTO VIEW OF RUN STATUS HVAC ascii string spelling out the hvac modes string OCC Occupied ? YES/NO OCCUPIED forcible MAT Mixed Air Temperature EDT Evaporator Discharge Tmp...

  • Page 113: Economizer Run Status

    Cap Threshold Adding (Z.PLU) — This parameter is used in High Temp Cap Override (H.TMP) — If stages of mechani- the calculation of SMZ and is calculated as follows: cal cooling are on and the error is greater than twice Y.PLU, and the rate of change of error is greater than 0.5...

  • Page 114: Exv Information Display Table

    Low Temp Cap Override (L.TMP) — If the error is less than VFD INFORMATION DISPLAY TABLE — The VFD in- twice Y.MIN, and the rate of change of error is less than formation display table provides information on the supply fan –0.5F, then a mechanical stage will be removed every 30 sec- VFD and exhaust fan VFD.

  • Page 115: Ccn/Linkage Display Table

    Table 88 — CCN/Linkage Display Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS LINK CCN - LINKAGE MODE Linkage Active - CCN ON/OFF MODELINK L.Z.T Linkage Zone Control Tmp L.C.SP Linkage Curr. Cool Setpt LCSP L.H.SP Linkage Curr. Heat Setpt LHSP Table 89 —...
  • Page 116 DIAGNOSTIC ALARM CODES POSSIBLE 4. Return to Normal mode and observe compressor opera- CAUSES tion to verify that compressor current sensor is working and condenser fans are energized. T048 (Ckt A, Oil Return Not Reliable with Only One Comp Available) A051 (Circuit A, Compressor 1 Stuck On Failure) T049 (Ckt B, Oil Return Not Reliable with Only One Comp A052 (Circuit A, Compressor 2 Stuck On Failure)
  • Page 117 high-pressure switch trip, the upper horizontal portion of the faulty sensor, wiring error, or damaged input on the CEM compressor operating envelope (see Fig. 22) is lowered 0.4 F board. (3 psig). The control will not allow the compressor operating T073 (Outside Air Temperature Thermistor Failure) —...
  • Page 118 Table 92 — Alert and Alarm Codes ALARM DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD ALERT NUMBER T048 CktA, Oil Return Not Reliable With Only One Comp Available Circuit shut down Automatic T049 CktB, Oil Return Not Reliable With Only One Comp Available Circuit shut down Automatic T051...
  • Page 119 Table 92 — Alert and Alarm Codes (cont) ALARM DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD ALERT NUMBER A180 Cir B EXV Control Board Comm Failure Circuit shut down Automatic A200 Linkage Timeout Error - Comm Failure Resorts to local unit setpoints Automatic T210 Building Pressure Transducer Failure...
  • Page 120 Table 92 — Alert and Alarm Codes (cont) ALARM DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD ALERT NUMBER A644 Heat Coil Actuator Hunting Excessively alarm only Automatic A650 Bldg.Press. Actuator 1 Out of Calibration Alarm only Automatic T650 Economizer 3 Actuator Out of Calibration Alarm only Automatic A651...
  • Page 121 T098 (Circuit A Liquid Thermistor Failure) until the last compressor on the circuit is shut down, at which T099 (Circuit B Liquid Thermistor Failure) — Failure of time the circuit will be shut down with alert (T120, T121).   this sensor (Temperatures REF.T LT.A, LT.B) will disable...
  • Page 122 strike is tied to the circuit going off entirely, not reducing • both circuits incapable of cooling due to multiple alerts of capacity and recovering. Therefore it is possible that multiple compressors and/or pressure alerts P126 and P127 alerts may be stored in alarm history but not •...
  • Page 123 cause a complete system shut down when communication fail- economizer will operate as if it were not configured for ure occurs. Recovery is automatic. Reason for failure may be override. Recovery is automatic. Reason for error is either a due to incorrect wiring, power loss to the EXB board, or dam- faulty sensor, wiring error, or damaged input on the MBB con- age to the RS-485 drivers on the LEN bus.
  • Page 124     SENS RRH.S) setting, and the measured level is below the Configuration PROG PG.DC this alert will be  configurable RH Low Alert Limit (Configuration logged. Recovery is automatic. The reason for the alert is that  ...
  • Page 125 turning the indoor fan on will increase pressure in the space. blocked outlets on the building discharge duct, or the duct pres- Recovery is automatic when the input is no longer on. sure control system (i.e., duct pressure transducer, VFD, supply fan) has failed.
  • Page 126 ALRM) the unit will be instructed to shut down immediately. T613 (Econ Actuator Overload, Setpt Not Reached) Software reset is automatic when input has been reset. Possible A623 (Econ2 Actuator Overload, Setpt Not Reached) causes are under/over voltage, phase loss, or phase unbalance. T653 (Econ 3 Actuator Overload, Setpt Not Reached) T633 (Humidifier Act Overload, Setpt Not Reached) T500 (Current Sensor Board Failure - A1)

  • Page 127: Major System Components

    LEN communications port. The MBB also inter-   staged gas thermistors (Temperatures AIR.T S.G.L1-3) faces with the Carrier Comfort Network ® system through the fails, an alert will be generated and the remaining thermistors CCN communications port located on the COMM3 board. The ...
  • Page 128 a48-8712...
  • Page 129 Fig. 24 — 48/50N Main Base Board Input/Output Connections...
  • Page 130 Fig. 25 — 48/50N RXB, EXB, CEM Input/Output Connections...
  • Page 131 a48-8715 Fig. 26 — 48/50N EXV, SCB Input/Output Connections...
  • Page 132 Fig. 27 — 48/50N Typical Modulating Gas Heat Unit Control Wiring...
  • Page 133 Fig. 28 — 48/50N Typical Electric Heat Unit Control Wiring...
  • Page 134 Fig. 29 — 48/50N Typical Power Component Control Wiring...
  • Page 135 a48-8718...
  • Page 136 a48-8719...
  • Page 137 a48-8720 Fig. 32 — 48/50N Component Arrangement Power Box...
  • Page 138 a48-8721 Fig. 33 — 48/50N Component Arrangement Control Box...
  • Page 139 Local Operating Network — Suction Temperature CCHR — Crankcase Heater Relay — Liquid Pressure Transducer — Terminal Block — Carrier Comfort Network® — Limit Switch — Timer Relay Control Board — Cooling Coil Thermistor — Liquid Temperature TRAN — Transformer —...
  • Page 140 Table 93 — 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 141 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. 34 — Main Base Board (MBB) Table 94 — Rooftop Control Board (RXB) Inputs and Outputs...
  • Page 142 Table 95 — 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 UVCSTS UV-C Lamp Status Switch Input J4, 3-4 SACFM Supply Air CFM...
  • Page 143 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. 36 — Staged Gas Heat Control Board (SCB) CEBD430351 STATUS TEST 2 GREEN LED - ADDRESS RED LED - STATUS LEN (LOCAL EQUIPMENT NETWORK)
  • Page 144 Modulating Gas section uses a Pressure Switch in place The circuit breakers for the low voltage control transformers, of the Hall Effect sensor. The IGC is equipped with a LED interface connection for the Carrier Comfort Network (CCN) (light-emitting diode) for diagnostics. See Table 103.
  • Page 145 Table 98 — Compressor Expansion Board (CXB) Inputs and Outputs CONNECTOR POINT NAME POINT DESCRIPTION TYPE OF I/O I/O POINT NAME CONTROL BOARD 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 146 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 - 20 mA signal...
  • Page 147 with the TR1 to provide control of the modulating gas heat Table 103 — IGC Board Inputs and Outputs section. The SC30 is powered by an output from the TR1. It receives a capacity input from the SCB, provides a capacity CONNECTOR POINT NAME POINT DESCRIPTION...
  • Page 148 CCN connector and cable. Run new cable if necessary. module to module. A short in one section of the bus can cause problems Yellow LED — The MBB has one yellow LED. The Carrier with all system elements on the bus. Comfort Network (CCN) LED will blink during times of net- ®...

  • Page 149: Accessory Control Components

    on TB203. The 180-ohm resistor is on the terminals for when Table 107 — VFD Terminal Designations the filter pressure is used. The resistor must be removed for the switch to operate properly. The supply filter switch is connect- TERMINAL FUNCTION ed to terminals 3 and 4 on TB203.
  • Page 150 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. 39 — CCN System Architecture...
  • Page 151 Filter Pressure Sensor - Return (+24 VDC, 4 20 mA loop power). Transducer is mounted in Con- HK06WC035 PFDP trol Box. LEGEND — Carrier Comfort Network — Expansion Valve Control Board — Variable Air Volume — Variable Frequency Drive SPACE CO SENSORS —...

  • Page 152: Service

    The unit is also equipped with removable panels to gain ac- SERVICE cess to areas that do not normally require service. To remove All unit components can be reached Service Access — panel, remove 3 screws at the bottom of panel, lift panel verti- through clearly labeled hinged access doors.
  • Page 153 NOTE: Disassembly of the top cover may be required under To inspect blower wheel, remove heat exchanger access special service circumstances. It is very important that the ori- panel. Shine a flashlight into opening to inspect wheel. If clean- entation and position of the top cover be marked on the unit ing is required, remove motor and wheel assembly by remov- prior to disassembly.
  • Page 154 PRESSURE TUBING a48-8705 MODULATING GAS VALVE PRESSURE SWITCH PRESSURE FITTING See Detail A, Fig. 44. NOTE: Modulating Gas (Always Section #1) Fig. 46 — Modulating Gas Heat ROLLOUT SWITCH VALVE IGNITOR a48-8706 FLAME SENSOR Fig. 47 — Standard Gas Burner Details...

  • Page 155: Adjustments

    ROLLOUT VALVE SWITCH MODULATING GAS VALVE IGNITION FLAME SENSOR Fig. 48 — Modulating Gas Burner Assembly A48-8708 IGNITION DETAILS SENSOR DETAILS Fig. 49 — Sensor and Ignition Position RETURN-AIR FILTERS — Access to these filters is through Adjustments the door marked FILTER SECTION. Filters in upper and low- RETURN FAN MOTOR PLATE —...
  • Page 156 A48-8709 Fig. 50 — Combustion Blower Details SUPPLY FAN AND POWER EXHAUST MOTOR A48-8710 PLATE — Adjust using a wrench on the adjusting bolts: 1. Loosen holddown bolts. (See Fig. 52.) 2. Turn the adjusting bolts to move the motor mounting plate toward or away from the fan to loosen or tighten the belts.
  • Page 157 BELT INSTALLATION AND TENSIONING INSTALLING REPLACEMENT MOTOR PULLEY — To install a field-supplied replacement pulley: IMPORTANT: When installing or replacing belts, 1. Turn off unit power. always use a complete set of new, matched belts to pre- vent potential vibration problems. Mixing belts often 2.

  • Page 158: Cleaning

    PLASTIC FAN PROPELLER CLEARANCE OF 0.25 INCHES (6.4 MM) FOR STANDARD CONDENSER FANS FAN DECK SURFACE FAN ORIFICE Fig. 56 — Condenser Fan Position (Plastic Fan) TRANSDUCER INPUT OUTPUT OUTPUT PART RANGE USAGE RANGE AT 0 IN. WG NUMBER (in. wg) Air Foil HK05ZG019 4-20 mA...

  • Page 159: Lubrication

    Only clean potable water is authorized for clean- REFRIGERANT CHARGE — Amount of refrigerant charge ing condenser coils. is listed on unit nameplate. Refer to Carrier GTAC II; Module 4. Clean condenser face by spraying the core steady and 5; Charging, Recovery, Recycling, and Reclamation section for uniformly from top to bottom while directing the spray charging methods and procedures.
  • Page 160 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) A48-8751 Fig. 58 — 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) a48-8752...
  • Page 161 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8753 Fig. 60 —Charging Chart — 75 Ton High Capacity, Standard Efficiency a48-8754 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 162 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8755 Fig. 62 — Charging Chart — 90 Ton Standard Capacity, Standard Efficiency a48-8756 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 163 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8757 Fig. 64 — Charging Chart — 90 Ton High Capacity, Standard Efficiency a48-8758 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 164 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE a48-8759 OUTDOOR AIR TEMPERATURE (F) Fig. 66 — Charging Chart — 105 Ton Standard Capacity, Standard Efficiency a48-8760 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 165 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8761 Fig. 68 — Charging Chart — 105 Ton High Capacity, Standard Efficiency a48-8762 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 166 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8763 Fig. 70 —Charging Chart — 120 Ton Standard Capacity, Standard Efficiency a48-8764 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 167 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8765 Fig. 72 — Charging Chart — 120 Ton High Capacity, Standard Efficiency a48-8766 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 168 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8767 Fig. 74 — Charging Chart — 130 Ton Standard Capacity, Standard Efficiency a48-8768 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 169 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8769 Fig. 76 — Charging Chart — 130 Ton High Capacity, Standard Efficiency a48-8770 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.
  • Page 170 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) a48-8771 Fig. 78 — Charging Chart — 150 Ton Standard Capacity, Standard Efficiency a48-8772 55 SST 45 SST 35 SST REDUCE CHARGE IF ABOVE ADD CHARGE IF BELOW CURVE OUTDOOR AIR TEMPERATURE (F) Fig.

  • Page 171: Gas System Adjustment (48N Only)

    7. Remove sensor wire and ignitor cable form IGC board. Change filter driers at the first sign of moisture in the sys- tem. See Carrier Charging Handbook for more information. 8. Remove 2 screws securing manifold bracket to basepan. 9. Remove 2 screws that hold the burner support plate IMPORTANT: Unit must be in operation at least flange to the vestibule plate.

  • Page 172: Filter Drier

    Replace whenever the moisture/liquid indi- Filter Drier — cator shows moisture in the system or when the system was opened for service. Use caution when Liquid Line Service Valves — closing liquid line service valves. The expansion of a trapped liquid can create dangerously high pressures.

  • Page 173: Compressor Removal

    must then be manually reset by power down and power up of All compressors can be re- Compressor Removal — the unit. moved from the compressor side of the unit. LIMIT SWITCH THERMISTOR (Staged Gas Unit IMPORTANT: All compressor mounting hardware and Only) —...

  • Page 174: Appendix A - Local Display Tables

    APPENDIX A — LOCAL DISPLAY TABLES MODE — RUN STATUS ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. VIEW AUTO VIEW OF RUN STATUS  HVAC ascii string spelling out the hvac modes string  Occupied ? YES/NO OCCUPIED forcible ...
  • Page 175 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — RUN STATUS (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. VFDS VFD INFORMATION  S.VFD SUPPLY FAN VFD (VFD 1)   S.VFD VFD1 Actual Speed % 0 to 100 VFD1_SPD ...
  • Page 176 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — SERVICE TEST ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. TEST Service Test Mode ON/OFF MAN_CTRL STOP Local Machine Disable YES/NO UNITSTOP config 29,30,33,75 S.STP Soft Stop Request YES/NO SOFTSTOP forcible 29,30...
  • Page 177 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — SERVICE TEST (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. HEAT TEST HEATING  HT.ST Requested Heat Stage 0 to 15 HTST_TST 31,33  HT.1 Heat Relay 1 Off/On HS1_TST 31,33...
  • Page 178 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — TEMPERATURES ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS AIR.T AIR TEMPERATURES  CTRL CONTROL TEMPS   CTRL Evaporator Discharge Tmp -40 to 240   CTRL Leaving Air Temperature -40 to 240 ...
  • Page 179 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...
  • Page 180 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...
  • Page 181 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. UNIT UNIT CONFIGURATION  C.TYP Machine Control Type 1 to 4 CTRLTYPE 27,41,44, 50,61,88  SIZE Unit Size (75 - 150) 75 to 150 UNITSIZE 44,46,51...
  • Page 182 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. E.PID EXV PID CONFIGS  EX.RR EXV PID Run Rate 5 to 120 Seconds EXV_RATE  EX.PG EXV PID Prop. Gain 0 to 5 EXV_PG 0.15...
  • Page 183 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 27,77  EC.MN Economizer Min.Position 0 to 100 ECONOMIN 27,77,123  EC.MX Economizer Max.Position 0 to 100...
  • Page 184 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. BUILDING PRESS. CONFIGS  BP.CF Building Press. Config 0 to 2 BLDG_CFG 28,80,81  BP.S Building Pressure Sensor Disable/Enable BPSENS Disable* 80,81 ...
  • Page 185 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. INDOOR AIR QUALITY CFG.  DCV.C DCV ECONOMIZER SETPOINTS   DCV.C EC.MN Economizer Min.Position 0 to 100 ECONOMIN 40,41,83-85 ...
  • Page 186 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. IAQ (cont)  TRIM SENSOR TRIM CONFIG.   TRIM SAT.T Air Temp Lvg SF Trim -10 to 10 SAT_TRIM 93,94 ...
  • Page 187 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 0 to 65535 TIME 97,98 DATE MONTH,DATE,DAY AND YEAR  MNTH Month of Year 1 to 12 97,98 ...

  • Page 188: Appendix B - Ccn Tables

    APPENDIX B — CCN TABLES All N Series units with ComtfortLink controls have a port In the following tables the structure of the tables which are for interface with the Carrier Comfort Network ® (CCN) sys- used with the Service Tool as well as the names and data that are tem.
  • Page 189 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 190 APPENDIX B — CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS HMZR HVAC Mode....: 16-char ASCII HumidiMizer Capacity HMZRCAPC Condenser EXV Position COND_EXV Bypass EXV Position BYP_EXV HumidiMizer 3-way Valve Off/On HUM3WVAL Cooling Control Point degF COOLCPNT...
  • Page 191 APPENDIX B — CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS UINPUTS Power Fault Input Normal/Alarm PWRFAULT forcible Main Filter Status Input Clean/Dirty FLTS forcible Post Filter Status Input Clean/Dirty PFLTS forcible Fan request from IGC Off/On IGCFAN...
  • Page 192 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 193 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 194 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT ACTUATOR Econ 1 Out Ser Number 1 ECN1_SN1 Econ 1 Out Ser Number 2 ECN1_SN2 Econ 1 Out Ser Number 3 ECN1_SN3 Econ 1 Out Ser Number 4 ECN1_SN4 Ecn1 Out Ctl Angl Lo Lmt ECONCALM...
  • Page 195 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT COOL Enable Compressor A1 Disable/Enable CMPA1ENA Enable Enable Compressor A2 Disable/Enable CMPA2ENA Enable Enable Compressor A3 Disable/Enable CMPA3ENA Enable Enable Compressor A4 Disable/Enable CMPA4ENA Enable Enable Compressor B1...
  • Page 196 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT ECON Economizer Installed ? No/Yes ECON_ENA Economizer Min.Position ECONOMIN Economizer Max.Position ECONOMAX Economzr trim for sumZ ? No/Yes ECONTRIM Econ ChangeOver Select ECON_SEL OA Enthalpy ChgOvr Selct OAEC_SEL Outdr.Enth Compare Value...
  • Page 197 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT HEAT Heating Control Type HEATTYPE Heating Supply Air Setpt degF SASPHEAT Occupied Heating Enabled No/Yes HTOCCENA MBB Sensor Heat Relocate No/Yes HTLATMON Modulating Gas Type HTSTGTYP Max Cap Change per Cycle HTCAPMAX...
  • Page 198 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT SP__ Static Pressure Control Disable/Enable STATICFG Disable Staged Air Volume Ctrl Disable/Enable STGAVCFG Disable Static Pressure Sensor Disable/Enable SPSENS Disable Static Press. Low Range SP_LOW Static Press.
  • Page 199 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME DEFAULT UNIT Machine Control Type CTRLTYPE Unit Size (75 - 150) UNITSIZE Fan Mode (0=auto,1=cont) FAN_MODE Remote Switch Config RMTINCFG CEM Module installed No/Yes CEM_BRD Liquid Sensors Installed No/Yes...
  • Page 200 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 201 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS COMPRSRA Compressor A1 Relay Off/On CMPA1 Compressor A1 Capacity CMPA1CAP Circ A High Press.Switch Low/High CIRCAHPS forcible Compressor A1 Feedback Off/On CSB_A1 Curr.Sens.Brd.
  • Page 202 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS DMANDLIM Active Demand Limit DEM_LIM forcible Current Running Capacity CAPTOTAL Demand Limit Select DMD_CTRL config Demand Limit Switch 1 Off/On DMD_SW1 forcible Demand Limit Switch 2 Off/On...
  • Page 203 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS EC_DIAG 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 204 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 205 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS PRESBLDG Building Pressure in H2O forcible Return Air CFM RACFM Exhaust Air CFM EACFM Supply Air CFM SACFM Outside Air CFM OACFM Power Exhaust Bypass Rly Off/On...
  • Page 206 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS SUMZ Cooling Control Point degF COOLCPNT Mixed Air Temperature degF Evaporator Discharge Tmp degF Return Air Temperature degF forcible Outside Air Temperature degF forcible Econ 1 Out Act.Curr.Pos.
  • Page 207 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS TESTHEAT Requested Heat Stage HTST_TST Heat Relay 1 Off/On HS1_TST Modulating Heat Capacity MGAS_TST Heat Relay 2 Off/On HS2_TST Relay 3 W1 Gas Valve 2 Off/On HS3_TST Relay 4 W2 Gas Valve 2...

  • Page 208: 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 00000000 00:00 00:00 Period 3: 00000000...
  • Page 209 APPENDIX C — UNIT STAGING TABLES 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.
  • Page 210 APPENDIX C — UNIT STAGING TABLES UNIT SIZE R, S, T STAGING SEQUENCE WITH DIGITAL COMPRESSOR (120-150 TON NOMINAL CAPACITY) SEQUENCE STAGE COMP Compressor Status UNIT Total Capacity 7% to 14% 21% to 28% 33% to 40% 45% to 52% 57% to 64% 69% to 76% 81% to 88% 93% to 100%...

  • Page 211: Appendix D - Vfd Information

    VFDs, the fan speed is controlled by a 3-phase VFD. The the drive. This can be accomplished by running the Carrier As- supply fan VFD is located in the supply fan section behind an sistant through the VFD keypad (see START-UP WITH THE access door.
  • Page 212 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 213 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 214 Use the UP or DOWN keys to highlight Roof Top factory settings, select the application macro “HVAC Default.” and press OK (SOFT KEY 2). c. The Carrier Assistant will ask “Is this a Hi E or The VFD has several different modes for VFD Modes —...
  • Page 215 A stationary arrow 2. Use the UP or DOWN keys to highlight ASSISTANTS indicates that the drive is stopped. For Carrier rooftop units, the on the display screen and press ENTER (SOFT KEY 2).
  • Page 216 APPENDIX D — VFD INFORMATION (cont) Upload All Parameters — To upload and store parameters in clock must be set. The date is used to determine weekdays and the control panel from the VFD, perform the following is visible in the fault logs. procedure: To set the clock, perform the following procedure: 1.
  • Page 217 Table I lists the routine maintenance intervals recommended • setting an appropriate bit in a Fault Word parameter by Carrier. (0305 to 0307) • overriding the control panel display with the display of a HEAT SINK — The heat sink fins accumulate dust from the fault code cooling air.
  • Page 218 APPENDIX D — VFD INFORMATION (cont) To replace the main fan for frame sizes R5 and R6, perform the following (see Fig. E): 1. Remove power from drive. Bottom View (R5) 2. Remove the screws attaching the fan. 3. Disconnect the fan cable. 4.
  • Page 219 UNDERLOAD LOAD 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 220 APPENDIX D — VFD INFORMATION (cont) Table H — Alarm Codes ALARM ALARM NAME DESCRIPTION AND RECOMMENDED CORRECTIVE ACTION CODE IN PANEL Reserved 2001 — Reserved 2002 — Reserved 2003 — The change in direction being attempted is not allowed. Do not attempt to change the direction of motor rota- 2004 DIR LOCK tion, or Change parameter 1003 DIRECTION to allow direction change (if reverse operation is safe).

  • Page 221: Process

    APPENDIX E — MODE SELECTION PROCESS The following section is to be used in conjunction with HVAC mode: ("Freeze Stat Trip") Fig. 7 on page 43. To help determine why the unit controls are in a certain mode, the programming logic is provided below. Else If: Configured for static pressure control The software will proceed, step by step, until a mode is ...
  • Page 222 HVAC mode: ("Off ") HVAC mode: ("Low Cool ") — The unit is off and no operating modes are active. — This is a normal cooling mode when a low cooling demand exists. HVAC mode: ("Tempering Vent ") HVAC mode: ("High Cool ") —...

  • Page 223: Option

    APPENDIX F — BACNET COMMUNICATION OPTION The following section is used to configure the UPC Open controller. The UPC Open controller is mounted in a separate enclosure below the main control box. 10's To Address the UPC Open Controller — user must give the UPC Open controller an address that is unique on the BACnet* network.

  • Page 224: Appendix F - Bacnet Communication

    The example in Fig. I shows the BAS Port DIP Switches set due to echoing. See Fig. H, J, and K. 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 appro- priate communications speed of the MS/TP network (9600, 1.
  • Page 225 APPENDIX F — BACNET COMMUNICATION OPTION (cont) Fig. K — BT485 Terminator Installation To install a BT485 terminator, push the BT485 terminator temperature rating specifications list two acceptable alterna- on to the BT485 connector located near the BACnet connector. tives. The Halar specification has a higher temperature rating and a tougher outer jacket than the SmokeGard specification, NOTE: The BT485 terminator has no polarity associated with and it is appropriate for use in applications where the user is...
  • Page 226 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 227 If there are problems wiring or ad- Troubleshooting — fortLink controls must be set to the same CCN Address (Ele- dressing the UPC Open controller, contact Carrier Technical ment) number and CCN Bus number. The factory default set- Support. tings for CCN Element and CCN Bus number are 1 and 0 re- COMMUNICATION LEDS —...
  • Page 228 APPENDIX F — BACNET COMMUNICATION OPTION (cont) NETWORK POINTS LIST CCN POINT READ/ DEFAULT BACNET BACNET POINT DESCRIPTION UNITS RANGE NAME WRITE VALUE OBJECT ID OBJECT NAME Active Demand Limit DEM_LIM 0 - 100 AV:9 dem_lim_1 Air Pressure Switch BV:33 aps_1 Air Source Mode MSV:2005...
  • Page 229 APPENDIX F — BACNET COMMUNICATION OPTION (cont) NETWORK POINTS LIST (cont) CCN POINT READ/ DEFAULT BACNET BACNET POINT DESCRIPTION UNITS RANGE NAME WRITE VALUE OBJECT ID OBJECT NAME Compressor B1 Run Hours HR_B1 0 - 999999.9 AV:32 hr_b1_1 Compressor B1 Starts CY_B1 0 - 999999 AV:33...
  • Page 230 APPENDIX F — BACNET COMMUNICATION OPTION (cont) NETWORK POINTS LIST (cont) READ/ DEFAULT BACNET BACNET POINT DESCRIPTION CCN POINT NAME UNITS RANGE WRITE VALUE OBJECT ID OBJECT NAME Econ3 Act. Unavailable? ECON3UNAV BV60 econ3unav_1 Econ3 Ret Cmd Position ECN3CPOS 0 - 100 AV:129 ecn3cpos_1 Econo Current Min.
  • Page 231 APPENDIX F — BACNET COMMUNICATION OPTION (cont) NETWORK POINTS LIST (cont) READ/ DEFAULT BACNET BACNET POINT DESCRIPTION CCN POINT NAME UNITS RANGE WRITE VALUE OBJECT ID OBJECT NAME Local Schedule SCHEDULE BV:5 schedule_1 Local Schedule/Override Time Remaining SCHEDULE_OVERRIDE_ AV:155 schedule_override_time_ TIME_REMAINING remaining_1 Low Temp Cap Override...
  • Page 232 APPENDIX F — BACNET COMMUNICATION OPTION (cont) NETWORK POINTS LIST (cont) READ/ DEFAULT BACNET BACNET POINT DESCRIPTION CCN POINT NAME UNITS RANGE WRITE VALUE OBJECT ID OBJECT NAME Space Temperature Offset SPTO °^F -10 - 10 AV:138 spto_1 SPT Override Enabled ? SPT_OVER 0 - 1 BV:54...

  • Page 233: Option

    APPENDIX F — BACNET COMMUNICATION OPTION (cont) NETWORK POINTS LIST (cont) READ/ DEFAULT BACNET BACNET POINT DESCRIPTION CCN POINT NAME UNITS RANGE WRITE VALUE OBJECT ID OBJECT NAME UV-C Lamp UVC_LAMP BV:84 uvc_lamp_1 UV-C Lamp Status UVCSTS BV:85 uvcsts_1 VAV Occ. Cool Off Delta VAVOCOFF °^F 1 - 25...

  • Page 234: Appendix G - Optional Motormaster

    ® APPENDIX G — OPTIONAL MOTORMASTER V CONTROL The following ComfortLink control configurations must be GENERAL set when using a Motormaster V device: This appendix contains instructions for the start-up and ser-   • Configuration COOL M.M. = YES vice of the optional Motormaster V (MMV) control on 48/50N 75-150 ton units.
  • Page 235 CANNOT go any faster to maintain set point. It is strongly recommended that the user NOT change any programming without consulting Carrier service personnel. If the VFD is not slowing down even though liquid line Unit damage may occur from improper programming.
  • Page 236 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 Standard Speed source: 01 = keypad, 04 = 4-20mA (NO PI), 05 = R22 or R410A,...
  • Page 237 The control board has sensed a Consult factory. problem Data Fault Manual User data and Carrier defaults in the Restore factory defaults by toggling P48 to EPM are corrupted. another mode. Then set P48 to desired mode to restore all defaults for that mode.

  • Page 240: Index

    Two-stage gas and electric heat control Hot gas bypass Unit configuration (unit) submenu © Carrier Corporation 2014 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480114-01 Printed in U.S.A.
  • Page 241 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 242 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 MM.PG Motor Master Prop. Gain 0 to 5 MM.PD Motor Master Deriv. Gain 0 to 5 MM.TI Motor Master Integ.
  • Page 243 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING HH.CF HYDRONIC HEAT CONFIGS HW.P Hydronic Ctl.Prop. Gain HW.I Hydronic Ctl.Integ. Gain 0 to 1.5 HT.D Hydronic Ctl.Derv. Gain 0 to 1.5 HT.TM Hydronic PID Rate Config 15 to 300 sec ACT.C HYDR.HEAT ACTUATOR CFGS.
  • Page 244 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING ECON (CONT) T.24.C TITLE 24 CONFIGS T.24.CLOG.F Log Title 24 Faults Yes/No T.24.CEC.MD T24 Econ Move Detect 1 - 10 T.24.CEC.ST T24 Econ Move SAT Test 10 - 20 T.24.CS.CHG T24 Econ Move SAT Change 0 - 5...

  • Page 245: Controls Set Point And Configuration Log

    CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING BP (CONT) DMD.L DEMAND LIMIT CONFIG. DMD.LDM.L.S Demand Limit Select 0 to 3 (multi-text strings) DMD.LD.L.20 Demand Limit at 20 ma 0 to 100 % DMD.LSH.NM Loadshed Group Number 0 to 99 DMD.LSH.DL Loadshed Demand Delta...
  • Page 246 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING IAQ (CONT) CNN CCN CONFIGURATION CNNCNN.A CCN Address 1 to 239 CNNCNN.B CCN Bus Number 0 to 239 CNNBAUD CCN Baud Rate 1 to 5 (multi-text strings) BROD CCN BROADCST DEFINITIONS BRODTM.DT CCN Time/Date Broadcast...
  • Page 247 CONTROLS SET POINT AND CONFIGURATION LOG (cont) ITEM EXPANSION RANGE DEFAULT SETTING IAQ (CONT) DISP DISPLAY CONFIGURATION DISPTEST Test Display LEDs Off/On DISPMETR Metric Display Off/On DISPLANG Language Selection 0 to 1 (multi-text strings) DISPPAS.E Password Enable Disable/Enable Enable DISPPASS Service Password 0000 to 9999 1111...

  • Page 248: Unit Start-Up Checklist

    CIRCUIT NO. 2 __________ PSIG CIRCUIT NO. 2__________ PSIG  ______________________ VERIFY REFRIGERANT CHARGE. © Carrier Corporation 2014 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480114-01 Printed in U.S.A.

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