Carrier 48AJ Operating And Service Manual
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Carrier 48AJ Operating And Service Manual

Single package large rooftop units with scroll compressors and comfort link version 4.x controls
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See also: Instruction and Installation Manual
Controls, Start-Up, Operation,

Service and Troubleshooting

CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . .2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3
BASIC CONTROL USAGE. . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
ComfortLink Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Scrolling Marquee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Accessory Navigator™ Display. . . . . . . . . . . . . . . . . . . . . .4
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
System Pilot™ Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
CCN Tables and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Conventions Used in this Manual. . . . . . . . . . . . . . . . . . . .5
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Unit Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Internal Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Accessory Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Crankcase Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Evaporator Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Gas Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
CONTROLS QUICK START . . . . . . . . . . . . . . . . . . . . . . 27-29
Mechanical Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . .27
Two-Stage Constant Volume Units with
Space Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
or Space Temperature Sensor . . . . . . . . . . . . . . . . . . . .27
Mechanical Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . .28
Multi-Stage Constant Volume Units with
Space Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Economizer Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Indoor Air Quality Options. . . . . . . . . . . . . . . . . . . . . . . . . .28
Exhaust Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Set Clock on VFD (If Installed) . . . . . . . . . . . . . . . . . . . . . .28
Programming Operating Schedules . . . . . . . . . . . . . . . .29
SERVICE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,30
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Service Test Mode Logic . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Independent Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
THIRD PARTY CONTROL . . . . . . . . . . . . . . . . . . . . . . . . 30-32
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Remote Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
VFD Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Supply Air Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Demand Limit Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Demand Controlled Ventilation Control . . . . . . . . . . . . .31
CONTROLS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . 32-72
Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480037-01
Book 1
1
Tab
1a 1b
Single Package Large Rooftop Units
and COMFORTLINK™ Version 4.X Controls
Unit Configuration Submenu . . . . . . . . . . . . . . . . . . . . . . . 35
Page
Cooling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
• COMPRESSOR SAFETIES
• COMPRESSOR TIME GUARDS
• COOL MODE SELECTION PROCESS
• COOLING MODE DIAGNOSTIC HELP
• SUMZ COOLING ALGORITHM
• HEAD PRESSURE CONTROL
Heating Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
• RELOCATE SAT SENSOR FOR HEATING -
LINKAGE SYSTEMS
Static Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
• OPERATION
Fan Status Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
• GENERAL
Dirty Filter Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
• SETTING UP THE SYSTEM
• ECONOMIZER OPERATION
Building Pressure Control. . . . . . . . . . . . . . . . . . . . . . . . . . 61
OPERATION
Smoke Control Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Printed in U.S.A.
Form 48/50A-4T
48/50AJ,AK,AW,AY020-060
with Scroll Compressors
Pg 1
8-06
Page
Replaces: 48/50A-3T

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Summary of Contents for Carrier 48AJ

  • Page 1: Table Of Contents

    48/50AJ,AK,AW,AY020-060 Single Package Large Rooftop Units with Scroll Compressors and COMFORTLINK™ Version 4.X Controls Controls, Start-Up, Operation, Service and Troubleshooting Page CONTENTS Unit Configuration Submenu ..... . . 35 Page Cooling Control .

  • Page 2: Safety Considerations

    Wear safety glasses and work gloves. Use quenching Carrier Comfort Network (CCN) ....68 cloth for unbrazing operations. Have fire extinguishers avail- Alert Limit Configuration.

  • Page 3: Basic Control Usage

    Only four, large, easy-to-use buttons are creation, and service can be done through a unit-mounted required to maneuver through the entire controls menu. Scrolling Marquee. Access can also be done through the Carrier For added service flexibility, an accessory hand-held Comfort Network system using the ComfortVIEW™...

  • Page 4: Accessory Navigator™ Display

    System Pilot™ Interface — key to enter the mode. Depending on the mode, there ENTER 01) device is a component of Carrier’s 3V™ system and serves as may be additional tiers. Continue to use the keys a user-interface and configuration tool for all Carrier communi- cating devices.

  • Page 5: Ccn Tables And Display

    IMPORTANT: The computer system software (ComfortVIEW™, Service Tool, etc.) that is used to interact with CCN controls always saves a template of items it considers as static (e.g., limits, units, forcibil- ity, 24-character text strings, and point names) after the software uploads the tables from a control. There- after, the software is only concerned with run time data like value and hardware/force status.
  • Page 6 Table 2 — Scrolling Marquee 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)

  • Page 7: Start-Up

    Use the following steps for the controls: START-UP Controls — IMPORTANT: The unit is shipped with the unit control IMPORTANT: Do not attempt to start unit, even disabled. To enable the control, set Local Machine Disable momentarily, until all items on the Start-Up Checklist →...
  • Page 8 Table 3 — Fan Performance — 48AJ,AK020,025 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Rpm Bhp Rpm 4,000 1.06 1.15 1.51 1.89 2.29 2.69 3.11 3.53 3.96 4.39 5,000 1.26 1.58 1.96 2.36 2.77 3.20 3.63 4.08 4.53 4.99...
  • Page 9 Table 5 — Fan Performance — 48AJ,AK035 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 7,000 2.97 3.40 3.83 4.28 4.73 5.20 5.68 6.17 6.67 7.17 8,000 3.95 4.40 4.85 5.32 5.79 6.28 6.77 7.27 7.79 8.31 9,000 5.11 5.58...
  • Page 10 Table 7 — Fan Performance — 48AJ,AK040 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 2.90 3.30 3.71 4.12 4.54 4.97 5.40 5.85 6.31 6.77 9,000 3.81 4.24 4.67 5.11 5.55 6.00 6.45 6.92 7.39 7.87 10,000 4.89 5.34...
  • Page 11 Table 9 — Fan Performance — 48AJ,AK050 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 2.98 3.38 3.79 4.20 4.62 5.05 5.49 5.94 6.40 6.86 9,000 3.90 4.33 4.77 5.20 5.65 6.10 6.55 7.02 7.49 7.97 10,000 5.00 5.45...
  • Page 12 Table 11 — Fan Performance — 48AJ,AK060 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 12,000 4.33 5.04 5.78 6.56 7.39 8.24 9.12 786 10.02 819 10.93 851 11.85 14,000 6.19 6.96 7.74 8.56 9.41 758 10.30 793 11.21 827 12.15...
  • Page 13 Table 13 — Fan Performance — 50AJ,AK027,030 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 1.42 1.74 2.11 2.50 2.90 3.31 3.72 4.14 4.56 4.98 6,000 1.62 2.01 2.40 2.80 3.21 3.63 4.05 4.48 4.91 5.35 7,000 2.23 2.65 3.07 3.49...
  • Page 14 Table 15 — Fan Performance — 50AJ,AK036 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 7,000 1.99 2.35 2.72 3.08 3.46 8,000 2.69 3.08 3.47 3.86 4.26 9,000 3.53 3.94 4.36 4.78 5.20 10,000 4.52 4.96 5.40 5.84 6.29 11,000 5.68 6.14...
  • Page 15 Table 17 — Fan Performance — 50AJ,AK041 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 2.69 3.08 3.47 3.86 4.26 9,000 3.53 3.94 4.36 4.78 5.20 10,000 4.52 4.96 5.40 5.84 6.29 11,000 5.68 6.14 6.60 7.07 7.55 12,000 7.01 7.49...
  • Page 16 Table 19 — Fan Performance — 50AJ,AK051 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 10,000 2.69 3.31 3.96 4.63 5.33 12,000 4.03 4.71 5.41 6.12 6.86 13,000 4.83 5.55 6.27 7.01 7.77 14,000 5.74 6.49 7.24 8.01 8.79 15,000 6.75 7.53...
  • Page 17 Table 21 — Fan Performance — 48AW,AY020,025 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 4,000 1.06 1.20 1.56 1.94 2.34 2.74 3.15 3.57 4.00 4.42 5,000 1.29 1.66 2.04 2.44 2.85 3.28 3.72 4.16 4.61 5.07 6,000 1.87 2.26 2.66 3.08...
  • Page 18 Table 23 — Fan Performance — 48AW,AY035 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 7,000 3.13 3.56 4.00 4.45 4.91 5.39 5.87 6.36 6.86 7.37 8,000 4.17 4.62 5.08 5.55 6.03 6.52 7.02 7.53 8.05 8.57 9,000 5.40 5.88 6.36 6.85...
  • Page 19 Table 25 — Fan Performance — 48AW,AY040 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 3.10 3.50 3.91 4.33 4.75 5.18 5.62 6.07 6.53 7.00 9,000 4.08 4.51 4.95 5.39 5.83 6.28 6.74 7.21 7.69 8.17 10,000 5.24 5.70 6.16 6.62...
  • Page 20 Table 27 — Fan Performance — 48AW,AY050 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 3.18 3.58 3.99 4.41 4.83 5.27 5.71 6.16 6.63 7.09 9,000 4.17 4.60 5.04 5.48 5.93 6.38 6.84 7.31 7.79 8.28 10,000 5.35 5.80 6.27 6.73...
  • Page 21 Table 29 — Fan Performance — 48AW,AY060 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 12,000 4.81 5.54 6.30 7.10 7.93 8.79 9.68 808 10.59 841 11.52 872 12.46 14,000 6.90 7.69 8.50 9.33 754 10.20 790 11.10 824 12.02 857 12.97 888 13.94 917 14.92...
  • Page 22 Table 31 — Fan Performance — 50AW,AY027,030 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 1.45 1.83 2.21 2.60 2.99 3.39 3.79 4.21 4.63 5.06 6,000 1.72 2.12 2.52 2.92 3.32 3.73 4.15 4.57 5.01 5.44 7,000 2.38 2.81 3.24 3.67...
  • Page 23 Table 33 — Fan Performance — 50AW,AY036 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 7,000 2.13 2.49 2.86 3.23 3.60 8,000 2.88 3.27 3.66 4.06 4.46 9,000 3.78 4.20 4.62 5.04 5.47 10,000 4.86 5.30 5.74 6.19 6.64 11,000 6.11 6.57...
  • Page 24 Table 35 — Fan Performance — 50AW,AY041 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 8,000 2.88 3.27 3.66 4.06 4.46 9,000 3.78 4.20 4.62 5.04 5.47 10,000 4.86 5.30 5.74 6.19 6.64 11,000 6.11 6.57 7.04 7.51 7.99 12,000 7.54 8.03...
  • Page 25 Table 37 — Fan Performance — 50AW,AY051 Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 10,000 2.98 3.61 4.26 4.95 5.66 12,000 4.48 5.17 5.88 6.61 7.36 13,000 5.39 6.11 6.85 7.61 8.38 14,000 6.41 7.17 7.94 8.72 9.51 15,000 7.56 8.34...
  • Page 26 2. All motors comply with Energy Policy Act (EPACT) Standards effective NOTES: October 24, 1997. 1. Extensive motor and electrical testing on the Carrier units has ensured that the full horsepower range of the motor can be utilized with confidence. Table 40A — Air Quantity Limits (48AJ,AK,AW,AY)

  • Page 27: Controls Quick Start

    → → 10. Under the Configuration SC.OV submenu, the CONTROLS QUICK START following schedules and overrides should be configured: The following section will provide a quick user guide to set- ting up and configuring the A Series units with ComfortLink™ O.T.L.

  • Page 28: Multi-Stage Constant Volume Units With

    10. See the Economizer Options section below for addition Multi-Stage Constant Volume Units with economizer option configurations. To configure the unit, per- Mechanical Thermostat — form the following: 11. See the Exhaust Options section below for addition exhaust option configurations. 1.

  • Page 29: Programming Operating Schedules

    3. Use the UP or DOWN keys to highlight CLOCK VISI- 4. Configure the unoccupied time for period 1 (UNC). BILITY and press SEL (SOFT KEY 2). This parameter Scroll down to UNC and press ENTER to go into Edit is used to display or hide the clock on the screen.

  • Page 30: Independent Outputs

    Table 41 — Service Test ITEM EXPANSION RANGE UNITS POINT WRITE STATUS TEST Service Test Mode ON/OFF MAN_CTRL STOP Local Machine Disable YES/NO UNITSTOP config S.STP Soft Stop Request YES/NO SOFTSTOP forcible FAN.F Supply Fan Request YES/NO SFANFORC forcible F.4.CH 4 in.

  • Page 31: Vfd Control

    The state of the input on the display can be found at On VFD equipped supply fans, supply VFD Control — → → Inputs AIR.Q IAQ.I. duct static pressure control may be left under unit control or be externally controlled. To control a VFD externally with a 4 to Before configuring the switch functionality, first determine →...

  • Page 32: Controls Operation

    IQ.A.C = 2 (IAQ Analog Input Used to Override) — Under mode. The System mode is the top level mode that defines three → → Configuration AQ.SP, set IQ.O.P (IAQ Economizer essential states for the control system: OFF, RUN and TEST. Override Position).

  • Page 33: Hvac Modes

    2. System in the process of shutting down compressors and HVAC Mode — SOFTSTOP REQUEST (3) — The unit is waiting for timeguards to expire. off due to a soft stop request from the control. (“Shutting Down ...”) HVAC Mode — REM SW.DISABLE (4) — The unit is off due to the remote switch.
  • Page 34 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 35: Unit Configuration Submenu

    HVAC Mode — DEHUMIDIFICATION (23) — The unit is CEM MODEL INSTALLED (CEM) — This configuration in- operating in Dehumidification mode. structs the control to communicate with the Controls Expansion Module (CEM) over the Local Equipment Network (LEN) HVAC Mode — REHEAT (24) — The unit is operating in when set to Yes.

  • Page 36: Cooling Control

    Table 43 — Unit Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULTS UNIT UNIT CONFIGURATION C.TYP Machine Control Type 1 - 6 CTRLTYPE CV.FN Fan Mode (0=Auto, 1=Cont) 0 - 1 FAN_MODE RM.CF Remote Switch Config 0 - 3 RMTINCFG CEM Module Installed Yes/No CEM_BRD...

  • Page 37: Setting Up The System

    The A Series ComfortLink™ control offers two basic con- MACHINE DEPENDENT CONFIGURATIONS — Some trol approaches to mechanical cooling. Constant volume for 2 configurations are linked to the physical unit and must not be stages of cooling and VAV for multiple stages of cooling. In ad- changed.

  • Page 38: Supply Air Reset Configuration

    Table 45 — Setpoints ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT OHSP Occupied Heat Setpoint 40-99 OHSP OCSP Occupied Cool Setpoint 40-99 OCSP UHSP Unoccupied Heat Setpoint 40-99 UHSP UCSP Unoccupied Cool Setpoint 40-99 UCSP Heat-Cool Setpoint Gap 2-10 deltaF HCSP_GAP V.C.ON VAV Occ.
  • Page 39 Reverse Rotation Verified? (REV.R) — If this configuration 3. Occupied VAV cooling types (C.TYP=1 and 2) are called → is set to NO, then after a power up, in the normal run mode, the out in the unoccupied period (Operating Modes →...
  • Page 40 configured, this capability will work to prevent over-cooling Demand Level Low Cool Off Offset (L.C.OF) — This is the the space during the occupied period. cooling set point offset subtracted from “cooling set point plus L.C.ON” at which point a Low Cool mode ends. Supply Air Set Point Control and the Staging of Compressors —...
  • Page 41 3 compressor unit, if no compressors are currently on, Hi Cool Start compressor A2 is currently under a minimum off compressor timeguard, and 2 compressors are to be turned on, then com- H.C.ON pressors A1 and B1 will be turned on immediately instead of A1 and A2.
  • Page 42 EDT Low Override — There is an override if EDT drops too Table 49 — 2-Stage Sequence — low based on an alert limit that will lock out cooling. If the 48/50AJ,AW020-027 supply air/evaporator discharge temperature (EDT) falls below → →...
  • Page 43 Table 53 — Staging Sequence Without Hot Gas Bypass — 48/50AK,AY030-060 and Multi-Stage 48/50AJ,AW030-060 SEQUENCE 1 SEQUENCE 2 STAGE COMP Compressor Status Compressor Status UNIT Unit Capacity 48/50A Unit Capacity 48/50A 100% 100% 035,036 100% 100% 040,041 100% 100% 100% 100% 100% 100%...
  • Page 44 Table 56 — 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 MAX.S Maximum Cool Stages CLMAXSTG DEM.L Active Demand Limit DEM_LIM forcible SUMZ COOL CAP.

  • Page 45: Demand Limit Control

    The main elements to be calculated and used in the calcula- To freeze the MAT table entries, let the unit run with MAT.S tion of SumZ are: = 1. Once sufficient data has been collected, change MAT.S = 2. Do not reset the MAT table. 1) the rise per percent capacity (R.PCT) Reset MAT Table Entries? (MAT.R) —...
  • Page 46 Table 57 — Demand Limit Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT DMD.L DEMAND LIMIT CONFIG. DM.L.S Demand Limit Select 0 - 3 DMD_CTRL D.L.20 Demand Limit at 20 ma 0 - 100 DMT20MA SH.NM Loadshed Group Number 0 - 99 SHED_NUM SH.DL Loadshed Demand Delta...

  • Page 47: Economizer Integration With Mechanical Cooling

    → Head Pressure Control Operation — The following logic de- economizer’s current position (Run Status → scribes the head pressure control routine when any compressor ECON ECN.P) and compares it to the economizer’s maxi- → → has been commanded on. mum position (Configuration ECON EC.MX) –...

  • Page 48: Heat Mode Selection Process

    → → Heating Control Type (HT.CF) — The heating control types (Configuration HEAT OC.EN). See descriptions above in available are selected/configured with this variable. the Setting Up the System section for more information. 0 = No Heat If the unit is allowed to select a heat mode, then the next 1 = Electric Heat step is an evaluation of demand versus set point.

  • Page 49: Heat Mode Diagnostic Help

    Table 60 — 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 -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 DMDLHOFF L.C.ON...
  • Page 50 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 51: Integrated Gas Control Board Logic

    Staged Gas Heat Staging — Different unit sizes will control units there will be one IGC board. On size 030-050 high heat heat stages differently based on the amount of heating capacity units and 051 and 060 low heat units there are two IGC boards. included.
  • Page 52 → → → Table 65 — Staged Gas Heat Control Steps (Configuration Heat SG.CT HT.ST = 2) RELAY OUTPUT Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 6 CAPACITY STAGE MBB-RLY8 MBB-RLY7 SCB-RLY1 SCB-RLY2 SCB-RLY3 SCB-RLY4 IGC1 MGV1 IGC2 MGV2...

  • Page 53: Morning Warm Up

    Installing a New Sensor — Procure a duct-mount temperature • For all other cases, the trip point is T.V.UN. sensor (Carrier P/N 33ZCSENPAT or equivalent 10-k ohm at NOTE: The unoccupied economizer free cooling mode does 25 C NTC [negative temperature coefficient] sensor). Install not qualify as a HVAC cool mode as it is an energy saving the sensor through the side wall of the duct and secure.

  • Page 54: Static Pressure Control

    would like the 4 to 20 mA output to trigger a VFD on, as op- Variable air volume (VAV) Static Pressure Control — posed to the fan relay, SP.FN may be set to Yes when SP.CF = air-conditioning systems must provide varying amounts of air none.
  • Page 55 The 4 to 20 mA range corresponds directly to the 0 to Carrier before making significant changes to these factors. 3 in. wg of reset. Therefore 2 mA reset is 2/16 * 3-in. wg = →...

  • Page 56: Static Pressure Reset

    Operation — The ComfortLink™ controls support the use of given conditions, and as the conditions and airflow set point at static pressure reset. For static pressure reset to occur, the unit each terminal change throughout the operating period, and so must be part of a CCN system with access to CCN reset will the equipment static pressure set point.

  • Page 57: Fan Status Monitoring

    Fan Status Monitoring Table 72 — Dirty Filter Switch Points GENERAL — The A Series ComfortLink™ controls offer the capability to detect a failed supply fan through either a duct ITEM EXPANSION RANGE POINT static pressure transducer or an accessory discrete switch. The →...
  • Page 58 Table 73 — 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 59: Unoccupied Economizer Free Cooling

    Configuring the economizer for Unoccupied Economizer Free Cooling is done in the UEFC group. There are three configuration options, FC.CF, FC.TM and FC.LO. Unoccupied Economizer Free Cooling Configuration (FC.CF) — This option is used to configure the type of unoc- cupied economizer free cooling control that is desired.

  • Page 60: Economizer Diagnostic Help

    A48-7731 Fig. 9 — Custom Changeover Curve Example ECONOMIZER DIAGNOSTIC HELP — Because there are If the C.TYP is either 4 or 6, and the unit is in a cool mode, so many conditions which might disable the economizer from then being able to provide free cooling, the control has a display If Stage = 0...

  • Page 61: Building Pressure Control

    Table 74 — Economizer Run Status Table ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS ECN.P Economizer Act.Curr.Pos. 0-100 ECONOPOS ECN.C Economizer Act.Cmd.Pos. 0-100 ECONOCMD forcible ACTV Economizer Active ? YES/NO ECACTIVE DISA ECON DISABLING CONDITIONS UNAV Econ Act. Unavailable? YES/NO ECONUNAV R.EC.D...
  • Page 62 Table 75 — Building Pressure Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT BUILDING PRESS. CONFIG BP.CF Building Press. Config BLDG_CFG BP.MT Power Exhaust Motors PWRM BP.S Building Pressure Sensor Enable/Dsable BPSENS Dsable* BP.R Bldg Press (+/–) Range 0 - 1.00 BP_RANGE 0.25 BP.SP...

  • Page 63: Smoke Control Modes

    RELEVANT ITEMS: There are four smoke con- Smoke Control Modes — trol modes that can be used to control smoke within areas ser- The economizer’s commanded output can be found in viced by the unit: Pressurization mode, Evacuation mode, → →...

  • Page 64: Setting Up The System

    The logic that is used to control the dampers in response to IAQ conditions is shown in Fig. 10. The ComfortLink control will begin to open the damper from the IAQ.M position when ECONOMIZER the IAQ level begins to exceed the OAQ level by a config- MINIMUM DAMPER POSITION...
  • Page 65 Table 78 — Indoor Air Quality Configuration ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT DCV.C DCV ECONOMIZER SETPOINTS EC.MN Economizer Min.Position 0 - 100 ECONOMIN IAQ.M IAQ Demand Vent Min.Pos. 0 - 100 IAQMINP AQ.CF AIR QUALITY CONFIGS IQ.A.C IAQ Analog Sensor Config 0 - 4 IAQANCFG IQ.A.F...

  • Page 66: Pre-Occupancy Purge

    IQ.R.L) — This is the reference that will be used with a IQ.P.T) — This is the maximum amount of time that a purge non-Carrier IAQ sensor that may have a different characteristic can occur. curve. It represents the CO level at 4 mA.

  • Page 67: Temperature Compensated Start

    Dehumidification Configuration (D.SEL) — The dehumidi- Initiating a Reheat or Dehumidification Mode — To call out fication configuration can be set for the following settings: a Reheat mode in the Vent or the Off HVAC mode, or to call out a Dehumidification mode in a Cool HVAC mode, one of •...

  • Page 68: Temperature Compensated Start Logic

    ComfortLink™ control to participate as an ele- SCH.N = 65-99 The control is either set up to receive to a ment of the Carrier Comfort Network (CCN) directly from the broadcasted time schedule set to this local display. This section will deal with explaining the various...

  • Page 69: Alert Limit Configuration

    SPT Override Enabled? (SPT.O) — If a space sensor is RAT Low Alert Limit/Unocc (RA.L.U) — If the return-air present, then it is possible to override an unoccupied period by temperature is below the configurable unoccupied RAT Low pushing the override button on the T55 or T56 sensor. This Alert Limit (RA.L.U), then Alert 304 will be generated.

  • Page 70: Discrete Switch Logic Configuration

    This is used when field-supplied field-supplied demand limit switch is used that is normally switches or input devices are used instead of Carrier devices. The closed, change this variable to closed. normally open or normally closed setting may be different on a...

  • Page 71: Display Configuration

    Demand Limit Switch 2/Dehumidify — Off (DL2.L) — Table 85 — Remote Switch Configuration The demand limit switch no. 2 input is set for normally open for off. If a field-supplied demand limit switch is used that is ITEM EXPANSION RANGE POINT normally closed, change this variable to closed.

  • Page 72: Hot Gas Bypass

    Table 86 — 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 xxxxx Unoccupied Start No Override OPEN CLOSED xxxxx Occupied Stop Override OPEN xxxxx...
  • Page 73 Table 87 — TIME CLOCK Menu ITEM EXPANSION RANGE 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 74: Troubleshooting

    → Daylight Savings Stop Week (DS.SP SP.WK) — This is must be reset before the circuit can operate in either Normal the stop week of the month for daylight savings. The week can mode or Service Test mode. be set from 1 to 5. The electronic con- Thermistor Troubleshooting —...
  • Page 75 Table 88 — Cooling Service Analysis PROBLEM SOLUTION COMPRESSOR DOES NOT RUN Active Alarm Check active alarms using local display. Contactor Open 1. Power off. 1. Restore power. 2. Fuses blown in field power circuit. 2. After finding cause and correcting, replace with correct size fuse. 3.
  • Page 76 Table 88 — Cooling Service Analysis (cont) PROBLEM SOLUTION COMPRESSOR RUNNING BUT COOLING INSUFFICIENT Suction Pressure Low 1. Refrigerant charge low. 1. Add refrigerant. 2. Head pressure low. 2. Check refrigerant charge. 3. Air filters dirty. 3. Clean or replace filters. 4.
  • Page 77 Table 89 — Gas Heating Service Analysis PROBLEM CAUSE REMEDY Burners Will Not Ignite. Active alarm. Check active alarms using ComfortLink™ Scrolling Marquee. No power to unit. Check power supply, fuses, wiring, and circuit breakers. No power to IGC (Integrated Gas Control). Check fuses and plugs.
  • Page 78 LEGEND IDM — Induced-Draft Motor IGC — Integrated Gas Unit Controller NOTE: Thermostat Fan Switch in the “AUTO” position. A48-5656 Fig. 12 — IGC Service Analysis Logic...
  • Page 79 Table 91 — 5K Thermistor Temperature vs. Resistance (SCT Sensors) (English) VOLTAGE VOLTAGE VOLTAGE TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE DROP DROP DROP (Ohms) (Ohms) (Ohms) 1.982 7,686 0.511 1,190 –25 3.699 98,010 1.956 7,665 0.502 1,165 –24 3.689 94,707 1.930 7,468 0.494...
  • Page 80 Table 92 — 5K Thermistor Temperature vs. Resistance (SCT Sensors) (SI) VOLTAGE VOLTAGE VOLTAGE TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE DROP DROP DROP (Ohms) (Ohms) (Ohms) 1.982 7,855 0.506 1,158 –32 3.705 100,260 1.935 7,499 0.490 1,118 –31 3.687 94,165 1.889 7,161 0.475...
  • Page 81 Table 93 — 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (English) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) –25 4.758 196,453 2.994 14,925 0.890 2,166 –24 4.750 189,692...
  • Page 82 Table 94 — 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (SI) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) –32 4.762 200,510 3.056 15,714 0.940 2,315 –31 4.748 188,340...

  • Page 83: Forcing Inputs And Outputs

    → → Run Status VIEW H.MAX — Displays the maximum Many variables may Forcing Inputs and Outputs — number of heat stages available for this model. be forced both from the CCN and directly at the local display. This can be useful during diagnostic testing and also during ECONOMIZER RUN STATUS —...

  • Page 84: Auto View Of Run Status

    Cap Threshold Adding (Z.PLU) — This parameter is used in the control goes into an occupied mode (after a warm unoccu- the calculation of SMZ and is calculated as follows: pied mode). → → Z.PLU = Configuration COOL Z.GN * (10 + (4* Slow Change Cap Override (SLOW) —...

  • Page 85: Cooling Information

    Table 98 — Cooling Information Display Table ITEM EXPANSION RANGE UNITS 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 86: Alarms And Alerts

    Table 103 — Time Guard Display Table ITEM EXPANSION RANGE UNITS POINT WRITE STATUS TMGD TIMEGUARDS TG.A1 Compressor A1 Timeguard CMPA1_TG TG.A2 Compressor A2 Timeguard CMPA2_TG TG.B1 Compressor B1 Timeguard CMPB1_TG TG.B2 Compressor B2 Timeguard CMPB2_TG TG.H1 Heat Relay 1 Timeguard HS1_TG TG.H2 Heat Relay 2 Timeguard...
  • Page 87 Table 105 — Alert and Alarm Codes ALARM OR RESET ALERT DESCRIPTION ACTION TAKEN BY CONTROL PROBABLE CAUSE METHOD NUMBER A051 Circuit A, Compressor 1 Stuck On Failure Turn off all compressors Manual Welded Contact Automatic High pressure switch, compressor P051 Circuit A, Compressor 1 Failure Add strike to Compressor...
  • Page 88 Table 105 — Alert and Alarm Codes (cont) ALARM RESET DESCRIPTION ACTION TAKEN BY CONTROL PROBABLE CAUSE ALERT METHOD NUMBER Stop cooling, but continue T300 Space Temperature Below Limit Automatic Outdoor dampers stuck, no load to heat Stop heating, but continue T301 Space Temperature Above Limit Automatic...
  • Page 89 • Compressor internal overload protection is open. The inter- 2. Heating will be disabled while any one of the compres- nal overloads are used on the Scroll Tech compressors sors has this problem. (black) and smaller Maneurop compressors used on the 020, The possible causes are: 025, 027, 030, 035 units and 040 A1, A2 compressors.
  • Page 90 T075 (Return Air Thermistor Failure) — This alert occurs 134.5 psig. A circuit cannot run when this alert is active. Use when return temperature sensor (Tempera- the Scrolling Marquee to reset the alert. The cause of the alert → → tures AIR.T RAT) is outside the range –40 to 240 F (–40 to...
  • Page 91 T126 (Circuit A High Head Pressure) A172 (Controls Expansion Module Comm Failure) — This T127 (Circuit B High Head Pressure) — Alert codes 126, and alarm indicates that there are communications problems with 127 are for circuits A and B respectively. These alerts occur the Controls Expansion Board.
  • Page 92 → T221 (Outdoor Air Quality Sensor Failure) — The indoor air measured supply duct static pressure (Pressures → → → quality sensor (Inputs AIR.Q OAQ) fails if the signal from AIR.P SP) is below the configurable SP Low Alert Limit →...
  • Page 93 A407 (Smoke Purge Emergency Mode) — Unit has been T414 (Belimo Actuator Failure) — This alert occurs when the placed in the fire pressurization mode by means of the External commanded damper position is changing too rapidly. This alert → →...

  • Page 94: Major System Components

    LEN communications port. The MBB also interfaces with the monitors the status of the compressor by sensing the current Carrier Comfort Network through the CCN communications flow to the compressors and then provides digital status signal port. The board is located in the main control box.
  • Page 95 A48-7787...
  • Page 96 NEXT PAGE A48-7294 Fig. 14 — Auxiliary Control Box Wiring Schematic...
  • Page 97 LEN PORT FOR USE WITH NAVIGATOR A48-7809 Fig. 14 — Auxiliary Control Box Wiring Schematic (cont)
  • Page 98 A48-6866 Fig. 15 — Typical 2 Stage Gas Heat Wiring Schematic (Size 051 and 060 Units Shown)
  • Page 99 NEXT PAGE A48-7296 Fig. 16 — Typical Staged Gas Heat Wiring Schematic (Size 051 and 060 Units Shown)
  • Page 100 FROM PREVIOUS PAGE A48-7297 Fig. 16 — Typical Staged Gas Heat Wiring Schematic (Size 051 and 060 Units Shown) (cont)
  • Page 101 A48-6689...
  • Page 102 NEXT PAGE A48-7298 Fig. 18 — Typical Power Schematic (Size 051 and 060 Units Shown)
  • Page 103 FROM PREVIOUS PAGE A48-7299 Fig. 18 — Typical Power Schematic (Size 051 and 060 Units Shown) (cont)
  • Page 104 A48-7810...
  • Page 105 A48-7301...
  • Page 106 A48-7302...
  • Page 107 — Saturated Condensing Temperature Sensor — Control Circuit Breaker — Scroll Marquee Display — Crankcase Heater — Saturated Suction Temperature Sensor — Carrier Comfort Network T-55 — Room Temperature Sensor — Controls Expansion Module T-56 — Room Temperature Sensor with Setpoint COMP —...
  • Page 108 RED LED - STATUS YELLOW LED - GREEN LED- CCN (CARRIER COMFORT NETWORK) LEN (LOCAL EQUIPMENT NETWORK) INSTANCE JUMPER (SET TO 1) CEPL130346-01 HK 50AA029 CE BO 430346 STATUS A48-7811 Fig. 22 — Main Base Board (MBB) Table 106 — Main Control Board (MBB) Inputs and Outputs...
  • Page 109 A48-7706 Fig. 23 — Economizer Control Board (ECB1) and VAV Control Board (ECB2) Table 107 — Economizer Control Board (ECB1) Inputs and Outputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS RMTIN Remote occupancy J4, 1-2 24VAC = 1, 0VAC = 0...
  • Page 110 Table 108 — Valve Control Board (ECB2) Inputs and Outputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS J4, 1-2 24VAC = 1, 0VAC = 0 J4, 3-4 24VAC = 1, 0VAC = 0 Building static pressure J5, 1-3 1=24VDC, 2=0-20mA in, 3=GND...
  • Page 111 Table 109 — Staged Gas Control Board (SCB) Inputs and Outputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS J5, 1-3 1=5v, 2=Vin, 3=GND (thermistor 1-2) (0-5VDC, thermistor, ohms) J5, 4-6 4=5v, 5=Vin, 6=GND (thermistor 4-5) (0-5VDC, thermistor, ohms) LAT1SGAS Leaving air temperature 1 J5, 7-9...
  • Page 112 Table 110 — Controls Expansion Board (CEM) Inputs POINT I/O POINT PLUG AND PIN POINT DESCRIPTION SIGNAL PIN(S) PORT STATE NAME NAME REFERENCE INPUTS Supply Fan Status switch DI 1 J7, 1-2 0 = 24vac, 1= 0vac DMD_SW1 Demand Limit - Redline DI 2 J7, 3-4 0 = 24vac, 1= 0vac...
  • Page 113 POWER EXHAUST — The units can be equipped with an terminals 10 and 11. The sensor is located in the return air sec- optional power exhaust system. The power exhaust fans are tion behind the filter access door. forward-curved fans with direct-drive motors. The motors are FILTER STATUS SWITCH —...

  • Page 114: Accessory Control Components

    FIELD CONNECTION TERMINAL STRIPS — Field con- for normal 2-stage control, it is recommended that the multi- nection terminal strips are located in the main control box. See stage control be used. The room thermostat is connected to Fig. 28 and Table 113. TB4.
  • Page 115 Table 113 — Field Connection Terminal Strips TERMINAL TERMINAL DESCRIPTION TYPE BOARD TB-1 - POWER CONNECTION OR DISCONNECT (in Main Control Box) L1 power supply 208-230/460/575/380/-3-60, 400-3-50 L2 power supply 208-230/460/575/380/-3-60, 400-3-50 L3 power supply 208-230/460/575/380/-3-60, 400-3-50 TB-2 - GROUND (in Main Control Box) Neutral Power TB-3 - CCN COMMUNICATIONS (HY84HA096) (in Main Control Box) LEN +...
  • Page 116 These 3 wires run in parallel from module to module. Yellow LED — The MBB has one yellow LED. The Carrier Comfort Network (CCN) LED will blink during times of network communication. The other boards do not have a CCN communications port.
  • Page 117 TERMINAL TERMINAL NON CARRIER HVAC EQUIPMENT COMFORT AIR DISTRIBUTION-DIGITAL AIR VOLUME CONTROL (DAV) A48-7307 CONTROLLER LEGEND — Carrier Comfort Network ® — ComfortID™ Controls — ComfortLink™ Controls HVAC — Heating, Ventilation, and Air Conditioning Fig. 31 — CCN System Architecture...

  • Page 118: Service

    Totaline® environmentally sound coil cleaner is essential to special service circumstances. It is very important that the ori- extend the life of coils. This cleaner is available from Carrier entation and position of the top cover be marked on the unit...
  • Page 119 NOTES: 1. Torque set screws on blower wheel to 70 in. lb ± 2 in. lb. A48-3822 2. Torque set screw on propeller fan to 15 in. lb ± 2 in. lb. 3. Dimensions are in inches. Fig. 34 — Typical Gas Heating Section High velocity water from a pressure washer, garden hose, or compressed air should never be used to clean a coil.

  • Page 120: Lubrication

    CONDENSATE DRAIN — Check and clean each year at 4. Check the key for close-fitted clearances on the sides and start of cooling season. In winter, keep drains and traps dry. 0.015 in. clearance over the top of the key. Replace key if necessary.

  • Page 121: Evaporator Fan Service And Replacement

    Refrigerant Charge — 6. Adjust bolts and nut on mounting plate to secure motor in listed on unit nameplate. Refer to Carrier GTAC II; Module 5; fixed position. Recheck belt tension after 24 hours of Charging, Recovery, Recycling, and Reclamation section for operation.

  • Page 122: Thermostatic Expansion Valve (Txv)

    1 and 2, the main valve opens to its preset position. A complete list of replacement Replacement Parts — parts may be obtained from any Carrier distributor upon request. The regular factory setting is stamped on the valve body (3.5 in. wg).

  • Page 123: 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 83,84 → Occupied ? YES/NO OCCUPIED forcible...
  • Page 124 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — RUN STATUS (cont) ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS PAGE NO. TMGD TIMEGUARDS → TG.A1 Compressor A1 Timeguard CMPA1_TG → TG.A2 Compressor A2 Timeguard CMPA2_TG → TG.B1 Compressor B1 Timeguard CMPB1_TG →...
  • Page 125 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — PRESSURES ITEM EXPANSION RANGE UNITS CCN POINT WRITE STATUS AIR.P AIR PRESSURES → Static Pressure "H2O → Building Pressure "H2O REF.P REFRIGERANT PRESSURES → DP.A Cir A Discharge Pressure PSIG DP_A →...
  • Page 126 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 IAQ_MA → OAQ.M OAQ Milliamps OAQ_MA → SP.R.M SP Reset milliamps SPRST_MA → DML.M 4-20 ma Demand Signal DMDLMTMA...
  • Page 127 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. COOL COOLING CONFIGURATION → Z.GN Capacity Threshold Adjst –10 - 10 Z_GAIN → MC.LO Compressor Lockout Temp –20 - 55 OATLCOMP →...
  • Page 128 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. BUILDING PRESS. CONFIG → BP.CF Building Press. Config BLDG_CFG → BP.MT Power Exhaust Motors PWRM → BP.S Building Pressure Sensor Enable/Dsable BPSENS Dsable...
  • Page 129 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. CCN CONFIGURATION → CCNA CCN Address 1 - 239 CCNADD → CCNB CCN Bus Number 0 - 239 CCNBUS → BAUD CCN Baud Rate 1 - 5 (multi-text strings)
  • Page 130 APPENDIX A — LOCAL DISPLAY TABLES (cont) MODE — TIME CLOCK ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT PAGE NO. 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 →...

  • Page 131: Appendix B - Ccn Tables

    All A series units with ComfortLink™ controls have a port In the following tables the structure of the tables which are for interface with the Carrier Comfort Network (CCN) used with the Service Tool as well as the names and data that ®...
  • Page 132 APPENDIX B — CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS GENERAL Occupied ? Yes/No OCCUPIED forcible Static Pressure "H2O Building Pressure "H2O Outside Air Rel.Humidity OARH forcible Return Air Rel.Humidity RARH forcible Space Temperature Offset SPTO...
  • Page 133 APPENDIX B — CCN TABLES (cont) STATUS DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS TEMPS Air Temp Lvg Supply Fan Return Air Temperature forcible Outside Air Temperature forcible Space Temperature forcible Space Temperature Offset SPTO forcible Staged Gas LAT Sum LAT_SGAS...
  • Page 134 APPENDIX B — CCN TABLES (cont) SET POINT TABLE TABLE NAME RANGE UNITS POINT NAME DEFAULT SET_PNT Occupied Heat Setpoint 40-99 OHSP Occupied Cool Setpoint 40-99 OCSP Unoccupied Heat Setpoint 40-99 UHSP Unoccupied Cool Setpoint 40-99 UCSP Heat-Cool Setpoint Gap 2-10 deltaF HCSP_GAP...
  • Page 135 APPENDIX B — CCN TABLES (cont) CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT SCHEDOVR Schedule Number 0-99 SCHEDNUM Accept Global Holidays? Yes/No HOLIDAYT Override Time Limit hours Timed Override Hours hours OVR_EXT Accepting an Override: SPT Override Enabled ? Yes/No SPT_OVER T58 Override Enabled ?
  • Page 136 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT DEHU Dehumidification Config DHSELECT Dehumidification Sensor DHSENSOR Econ disable in DH mode? Yes/No DHECONEN Vent Reheat Setpt Select DHVHTCFG Vent Reheat RAT offset deltaF DHVRAOFF Vent Reheat Setpoint 55-95...
  • Page 137 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT IAQ_ Economizer Min.Position 0 - 100 ECONOMIN IAQ Demand Vent Min.Pos. 0 - 100 IAQMINP IAQ Analog Sensor Config 0 - 4 IAQANCFG IAQ 4-20 ma Fan Config 0 - 2 IAQANFAN IAQ Discrete Input Config...
  • Page 138 APPENDIX B — CCN TABLES (cont) SERVICE-CONFIG TABLES (cont) TABLE NAME RANGE UNITS POINT NAME DEFAULT SWLG Filter Status Inpt-Clean Open/Close FLTSLOGC Open IGC Feedback - Off Open/Close GASFANLG Open RemSw Off-Unoc-Strt-NoOv Open/Close RMTINLOG Open Economizer Switch - No Open/Close ECOSWLOG Open Fan Status Sw.
  • Page 139 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS ALARMS01 Active Alarm ascii ALARM_01 ------------------------ ascii Active Alarm ascii ALARM_02 ------------------------ ascii Active Alarm ascii ALARM_03 ------------------------ ascii Active Alarm ascii ALARM_04 ------------------------ ascii...
  • Page 140 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS ECON_MIN Econo Damper Command Pos ECONOCMD forcible Econo Damper Current Pos ECONOPOS Econo Current Min. Pos. ECMINPOS Diff.Air Quality in PPM Econo Position Override ECOORIDE forcible...
  • Page 141 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS ENTHALPY Outdoor Air Enthalpy Outside Air Temperature forcible Outside Air Rel.Humidity OARH forcible Outside Air RH Sensor OARHSENS config OA Dewpoint Temp Limit OADEWCFG config OutsideAir DewPoint Temp...
  • Page 142 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS PRESBLDG Building Pressure "H2O Econo Damper Current Pos ECONOPOS Power Exhaust Stage A PE_A Power Exhaust Stage B PE_B Power Exhaust Stage C PE_C BP Load Factor BPSMZ...
  • Page 143 APPENDIX B — CCN TABLES (cont) MAINTENANCE DISPLAY TABLES (cont) TABLE DISPLAY NAME RANGE UNITS POINT NAME WRITE STATUS TESTCOOL Compressor A1 Relay ON/OFF CMPA1TST test Compressor A2 Relay ON/OFF CMPA2TST test Min. Load Valve (HGBP) ON/OFF MLV_TST test Compressor B1 Relay ON/OFF CMPB1TST test...

  • Page 144: Appendix C - Vfd Information

    APPENDIX C — VFD INFORMATION On variable air volume units with optional VFD, the supply condensation from forming on the boards during the off mode fan speed is controlled by a 3-phase VFD. The VFD is located and is stopped by driving the speed to 0 (by sending a 4 mA in the supply fan section behind a removable panel.
  • Page 145 Table B — VFD Configurations PARAMETER GROUP PARAMETER TITLE PARAMETER INDEX CARRIER DEFAULT LANGUAGE 9901 ENGLISH APPLIC MACRO 9902 USER 1 MOTOR CTRL MODE 9904 SCALAR: FREQ Start-Up Data MOTOR NOM VOLT 9905 460v MOTOR NOM CURR 9906 *TBD* MOTOR NOM FREQ...
  • Page 146 For Carrier rooftop units, the Handler or Rooftop?” Select “Rooftop.” correct rotation is counterclockwise. b. The Carrier Assistant will ask “Is this a High E or The upper right corner shows the frequency set point that Premium E motor?” Select the correct efficiency the drive will maintain.
  • Page 147 Upload All Parameters — To upload and store parameters in the control panel from the VFD, perform the following procedure: 1. Select MENU (SOFT KEY 2). The Main menu will be displayed. 2. Use the UP or DOWN keys to highlight PAR BACKUP on the display screen and press ENTER (SOFT KEY 2).
  • Page 148 CLOCK SET MODE — The clock set mode is used for For conversion to third party Third Party Controls — setting the date and time for the internal clock of the VFD. In control of the VFD, perform the following procedure: order to use the timer functions of the VFD control, the internal 1.
  • Page 149 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 150 To reset a fault indicated by a flashing red LED, turn off the speed at the time of the fault. To clear the fault history (all of power for 5 minutes. To reset a fault indicated by a red LED Group 04, Fault History parameters), follow these steps: (not flashing), press RESET from the control panel or turn off 1.
  • Page 151 If installed in an appropriate envi- VFD Maintenance — ronment, the VFD requires very little maintenance. Table E lists the routine maintenance intervals recommend- ed by Carrier. Table E — Maintenance Intervals MAINTENANCE INTERVAL Heat Sink Temperature...

  • Page 152: Process

    6. Install the fan in reverse order, noting the following: the fan airflow is up (refer to arrow on fan); the fan wire harness is toward the front; the notched housing barb is located in the right-rear corner; and the fan cable connects just forward of the fan at the top of the drive.
  • Page 153 Else If: A compressor is diagnosed as being “Stuck On” HVAC mode: ("Vent ") — This is a normal operation mode where no heating or cooling is required and outside air is being HVAC mode: ("Comp. Stuck On ") delivered to the space to control IAQ levels. Else The control is free to select the normal heating/ HVAC mode: ("Low Cool...

  • Page 154: Airflow Control During Fire-Smoke Modes

    Auto view of run status Programming operating schedules Basic control usage Refrigerant charge Building pressure configuration Remote control switch input Building pressure control Remote switch Carrier Comfort Network (CCN) Replacement parts CCN tables and display Restart procedure CCN tables Run status menu 131-143 Cleaning Safety considerations ComfortLink™...
  • Page 155 CONTROLS SET POINT AND CONFIGURATION LOG MODEL NUMBER: Software Version SERIAL NUMBER: CESR131343-- DATE: CESR131249-- TECHNICIAN: CESR131249-- NAVI CESR131227-- CESR131226-- CESR131174-- MARQ CESR131171-- ITEM EXPANSION RANGE DEFAULT ENTRY UNIT UNIT CONFIGURATION → C.TYP Machine Control Type 1 - 6 (multi-text strings) →...
  • Page 156 ITEM EXPANSION RANGE DEFAULT ENTRY HEAT HEATING CONFIGURATION → HT.CF Heating Control Type 0 - 4 → HT.SP Heating Supply Air Setpt 80 - 120 dF → OC.EN Occupied Heating Enabled Yes/No → LAT.M MBB Sensor Heat Relocate Yes/No → G.FOD Fan-Off Delay, Gas Heat 45-600...
  • Page 157 ITEM EXPANSION RANGE DEFAULT ENTRY BUILDING PRESS. CONFIG → BP.CF Building Press. Config → BP.MT Power Exhaust Motors → BP.S Building Pressure Sensor Enable/Dsable Dsable → BP.R Bldg Press (+/-) Range 0 - 1.00 0.25 → → BP.SP Building Pressure Setp. –0.25 0.25 "H2O 0.05...
  • Page 158 ITEM EXPANSION RANGE DEFAULT ENTRY DEHU DEHUMIDIFICATION CONFIG. → D.SEL Dehumidification Config 0-2(multi-text strings) → D.SEN Dehumidification Sensor 1-2(multi-text strings) → D.EC.D Econ disable in DH mode? Yes/No → D.V.CF Vent Reheat Setpt Select 0-1(multi-text strings) → D.V.RA Vent Reheat RAT offset 0-8 ^F →...

  • Page 159: Unit Start-Up Checklist

    UNIT START-UP CHECKLIST MODEL NO.: _________________________________ SERIAL NO.: ______________________________________ SOFTWARE VERSION _________________________ TECHNICIAN: ____________________________________ DATE: _______________________________________ PRE-START-UP: VERIFY THAT DIP SWITCH SETTINGS ARE CORRECT VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT REMOVE ALL COMPRESSOR SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTRUCTIONS VERIFY INSTALLATION OF ECONOMIZER HOOD VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT...
  • Page 160 Copyright 2006 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 Catalog No. 04-53480037-01 Printed in U.S.A. Form 48/50A-4T Pg CL-6 8-06 Replaces: 48/50A-3T 1a 1b...

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