Carrier 48/50AJ - Manual

Carrier 48/50AJ

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Table of Contents:

  • Page 2 – Do not; WARNING
  • Page 3 – GENERAL; Table 1 — A Series Product Line; Conventions Used in This Manual —; Configuration; BASIC CONTROL USAGE; Comfort; Link Controls —
  • Page 4 – Scrolling Marquee —; ESCAPE; Fig. 1 — Scrolling Marquee; Fig. 2 — Accessory Navigator Display
  • Page 5 – This; Fig. 3 — System PilotTM User Interface
  • Page 6 – Table 2 — Scrolling Marquee Menu Display Structure
  • Page 9 – Table 6 — Fan Performance — 48AJ,AK036 Units
  • Page 10 – Table 8 — Fan Performance — 48AJ,AK041 Units
  • Page 26 – Table 39 — Motor Limitations
  • Page 27 – CONTROLS QUICK START
  • Page 28 – Economizer Options —
  • Page 29 – SERVICE TEST
  • Page 30 – Independent Outputs —; INDP; Fans in Service Test Mode —; FANS; Cooling in Service Test Mode —; COOL; Heating in Service Test Mode —; Table 41 — Service Test
  • Page 31 – and
  • Page 33 – Table 42 — Operating Modes Display Table; ITEM
  • Page 34 – Fig. 4 — Mode Selection
  • Page 35 – Unit Configuration Submenu —
  • Page 36 – SIZE; Table 43 — Unit Configuration
  • Page 37 – Cooling Control —
  • Page 39 – Table 47 — Cooling Configuration
  • Page 40 – Time After Compressor is Stopped*; OHSP; Fig. 7 — VAV Occupied Period Trip Logic
  • Page 41 – OFF; Lo Cool End; Fig. 8 — Cool Mode Evaluation
  • Page 42 – Table 48 — Cool/Heat Set Point Offsets Configuration; Timeguards
  • Page 43 – Table 49 — 2-Stage Sequence —
  • Page 46 – TEMP; Table 61 — Run Status Mode Trip Helper; MAT
  • Page 47 – Table 62 — Run Status Cool Display; SUM Calculation
  • Page 48 – Switch Status
  • Page 49 – Table 63 — Demand Limit Configuration
  • Page 50 – Table 64 — Condenser Fan Staging; Heating Control —; FAN RELAY
  • Page 51 – Table 65 — Heating Configuration
  • Page 52 – Table 66 — Heat/Cool Set Point Offsets; Fig. 9 — Heating Offsets
  • Page 53 – Table 67 — Mode Trip Helper Table
  • Page 54 – Table 68 — Staged Gas Configuration
  • Page 56 – Table 73 — Staged Gas Heat Control Steps (; Table 74 — IGC LED Indicators; Setpoints
  • Page 57 – ON; Static Pressure Control —
  • Page 58 – Table 75 — Static Pressure Control Configuration
  • Page 59 – Fan Status Monitoring
  • Page 60 – Dirty Filter Switch —; Table 78 — Dirty Filter Switch Points; Economizer —
  • Page 61 – Fig. 10 — Psychrometric Chart for
  • Page 62 – Table 79 — Economizer Configuration Table; Fig. 11 — Custom Changeover Curve Example
  • Page 63 – Building Pressure Control —
  • Page 64 – Table 80 — Economizer Run Status Table; Outputs
  • Page 66 – Smoke Control Modes —
  • Page 67 – Indoor Air Quality Control —
  • Page 68 – VENTILATION FOR PEOPLE; Fig. 12 — IAQ Control; Fig. 13 — IAQ Response Curve
  • Page 69 – Dehumidification and Reheat —
  • Page 72 – Table 86 — CCN Configuration; Alert Limit Configuration —
  • Page 73 – Sensor Trim Configuration —; Table 87 — Alert Limit Configuration
  • Page 74 – Remote Control Switch Input —
  • Page 75 – Hot Gas Bypass —; Space Temperature Offset —; MNTH; Local Time Schedule (
  • Page 76 – Table 92 — Remote Switch Logic Configuration; Local Holiday Schedules (
  • Page 77 – Table 93 — Time Clock Configuration
  • Page 78 – Transducer Troubleshooting —; Table 94 — Cooling Service Analysis; PROBLEM
  • Page 79 – Table 94 — Cooling Service Analysis (cont)
  • Page 81 – Fig. 14 — IGC Service Analysis Logic; IDM —
  • Page 91 – SMZ; Table 105 — Auto View of Run Status Display Table
  • Page 93 – Alarms and Alerts —
  • Page 94 – Table 114 — Alert and Alarm Codes
  • Page 101 – Temperatures; MAJOR SYSTEM COMPONENTS; Factory-Installed Components
  • Page 105 – Fig. 17 — Typical Auxiliary Control Box Wiring Schematic
  • Page 106 – Fig. 17 — Typical Auxiliary Control Box Wiring Schematic (cont)
  • Page 118 – Table 115 — Main Control Board (MBB) Inputs and Outputs
  • Page 119 – Table 116 — Economizer Control Board (ECB1) Inputs and Outputs
  • Page 120 – Table 117 — VAV Control Board (ECB2) Inputs and Outputs
  • Page 121 – Table 118 — Staged Gas Control Board (SCB) Inputs and Outputs; TEST
  • Page 122 – POINT NAME; ENTER; Fig. 30 — Scrolling Marquee
  • Page 123 – Table 121 — VFD Terminal Designations; TERMINAL
  • Page 124 – Accessory Control Components —; BOARD
  • Page 125 – Table 122 — Field Connection Terminal Strips
  • Page 126 – UNIT CONTROL BOX; Fig. 34 — Accessory Navigator Display
  • Page 127 – CID; CL; HVAC; Fig. 35 — CCN System Architecture
  • Page 128 – Fig. 37 — Spark Gap Adjustment; Fig. 38 — Typical Gas Heating Section
  • Page 129 – Fig. 39 — Gas Heat Section Details; CAUTION
  • Page 130 – and Adjustment
  • Page 131 – Fig. 41 — Evaporator Fan Coupling
  • Page 132 – Service Test; Power Failure —; Table 123 – Round Tube, Plate Fin Unit Charge; Gas Valve Adjustment
  • Page 133 – Sa; MCHX —; SST
  • Page 134 – tdoor Air Te m pe r
  • Page 137 – 0 Ton MCHX Ch
  • Page 139 – Main Burners —; For all applications, main burners are; Filter Drier —; Replace whenever refrigerant system is ex-; Replacement Parts —; A complete list of replacement; Fig. 52 — Main Burner Removal
  • Page 140 – APPENDIX A — LOCAL DISPLAY TABLES; MODE — RUN STATUS
  • Page 148 – APPENDIX B — CCN TABLES; STATUS DISPLAY TABLES
  • Page 152 – SERVICE-CONFIG TABLES
  • Page 156 – MAINTENANCE DISPLAY TABLES
  • Page 160 – TIME SCHEDULE CONFIG TABLE
  • Page 161 – APPENDIX C — VFD INFORMATION; Table A — VFD Terminal Designations
  • Page 162 – Table B — VFD Configurations; VFD Operation —
  • Page 163 – VFD Modes —; Fig. C — Standard Display Example
  • Page 166 – Table C — Fault Codes
  • Page 167 – Table D — Alarm Codes; and simultaneously use a vacuum cleaner at the air outlet; Table E — Maintenance Intervals
  • Page 169 – Fig. F — Internal Enclosure Fan Replacement
  • Page 170 – APPENDIX D — MODE SELECTION PROCESS; YES
  • Page 171 – Fig. A — Address Rotary Switches; SS
  • Page 172 – BAUD RATE; Fig. C — DIP Switches
  • Page 173 – MS/TP Wiring Recommendations —; Table C — MS/TP Wiring Recommendations
  • Page 174 – Local access to the UPC Open —; BACview Installation and User Guide; Device Connection
  • Page 175 – Troubleshooting —; Table E — LED Status Indicators; Error; LEDs Controller and Network Status Indication
  • Page 176 – NETWORK POINTS LIST
  • Page 183 – INDEX
  • Page 185 – CONTROLS SET POINT AND CONFIGURATION LOG
  • Page 190 – UNIT START-UP CHECKLIST; ELECTRICAL
Loading the manual

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

Catalog No. 04-53480077-01

Printed in U.S.A.

Form 48/50A-9T

Pg 1

6-10

Replaces: 48/50A-7T

Controls, Start-Up, Operation,

Service and Troubleshooting

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . 2

GENERAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Conventions Used in this Manual

. . . . . . . . . . . . . . . . . . . . 3

BASIC CONTROL USAGE

. . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Comfort

Link Controls

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Scrolling Marquee

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Accessory Navigator™ Display

. . . . . . . . . . . . . . . . . . . . . . 4

Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

System Pilot™ Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CCN Tables and Display

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

• GENERICS STATUS DISPLAY TABLE

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27

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

Two-Stage Constant Volume Units with

Mechanical Thermostat

. . . . . . . . . . . . . . . . . . . . . . . . . .27

Two-Stage Constant Volume Units with

Space Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Variable Air Volume Units Using Return Air Sensor

or Space Temperature Sensor

. . . . . . . . . . . . . . . . . . . .28

Multi-Stage Constant Volume Units with

Mechanical Thermostat

. . . . . . . . . . . . . . . . . . . . . . . . . .28

Multi-Stage Constant Volume Units with

Space Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Economizer Options

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Indoor Air Quality Options

. . . . . . . . . . . . . . . . . . . . . . . . . .29

Exhaust Options

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Programming Operating Schedules

. . . . . . . . . . . . . . . .29

SERVICE TEST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,30

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Service Test Mode Logic

. . . . . . . . . . . . . . . . . . . . . . . . . . .29

Independent Outputs

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Fans in Service Test Mode

. . . . . . . . . . . . . . . . . . . . . . . . .30

Cooling in Service Test Mode

. . . . . . . . . . . . . . . . . . . . . . .30

Heating in Service Test Mode

. . . . . . . . . . . . . . . . . . . . . . .30

THIRD PARTY CONTROL

. . . . . . . . . . . . . . . . . . . . . . . . 31,32

Thermostat

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Alarm Output

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Remote Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

VFD Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Supply Air Reset

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Demand Limit Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Demand Controlled Ventilation Control

. . . . . . . . . . . . .31

CONTROLS OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . 32-75

Modes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

• SYSTEM MODES

• HVAC MODES

Page

Unit Configuration Submenu

. . . . . . . . . . . . . . . . . . . . . . . 35

Cooling Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

• SETTING UP THE SYSTEM

• MACHINE DEPENDENT CONFIGURATIONS

• SET POINTS

• SUPPLY AIR RESET CONFIGURATION

• COOLING CONFIGURATION

• COMPRESSOR SAFETIES

• COMPRESSOR TIME GUARDS

• COOL MODE SELECTION PROCESS

• COOLING MODE DIAGNOSTIC HELP

• SUMZ COOLING ALGORITHM

• DEMAND LIMIT CONTROL

• HEAD PRESSURE CONTROL

• ECONOMIZER INTEGRATION WITH

MECHANICAL COOLING

Heating Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

• SETTING UP THE SYSTEM

• HEAT MODE SELECTION PROCESS

• TEMPERATURE DRIVEN HEAT MODE

EVALUATION

• HEAT MODE DIAGNOSTIC HELP

• INTEGRATED GAS CONTROL BOARD LOGIC

• RELOCATE SAT SENSOR FOR HEATING IN

LINKAGE SYSTEMS

• MORNING WARM UP

• TEMPERING MODE

Static Pressure Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

• OPERATION

• SETTING UP THE SYSTEM

• STATIC PRESSURE RESET OPERATION

• RELATED POINTS

Fan Status Monitoring

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

• GENERAL

• SETTING UP THE SYSTEM

• SUPPLY FAN STATUS MONITORING LOGIC

Dirty Filter Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Economizer

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

• SETTING UP THE SYSTEM

• ECONOMIZER OPERATION

• UNOCCUPIED ECONOMIZER FREE COOLING

• ECONOMIZER OPERATION CONFIGURATION

• ECONOMIZER DIAGNOSTIC HELP

Building Pressure Control

. . . . . . . . . . . . . . . . . . . . . . . . . . 63

• BUILDING PRESSURE CONFIGURATION

• CONSTANT VOLUME 2-STAGE CONTROL

OPERATION

• MULTIPLE POWER EXHAUST STAGE BUILDING

PRESSURE CONTROL OPERATION

• VFD POWER EXHAUST BUILDING PRESSURE

CONTROL

Smoke Control Modes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

• FIRE-SMOKE INPUTS

• AIRFLOW CONTROL DURING THE

FIRE-SMOKE MODES

• RELEVANT ITEMS

WEATHERMAKER

®

48/50AJ,AK,AW,AY,A2,A3,A4,A5020-060

Single Package Large Rooftop Units

with

COMFORT

LINK™ Version 5.x Controls

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Summary

Page 2 - Do not; WARNING

2 CONTENTS (cont) Page Indoor Air Quality Control . . . . . . . . . . . . . . . . . . . . . . . . . . 67 • OPERATION • SETTING UP THE SYSTEM • PRE-OCCUPANCY PURGE Dehumidification and Reheat . . . . . . . . . . . . . . . . . . . . . . 69 • SETTING UP THE SYSTEM • OPERATION Temperature Compensated St...

Page 3 - GENERAL; Table 1 — A Series Product Line; Conventions Used in This Manual —; Configuration; BASIC CONTROL USAGE; Comfort; Link Controls —

3 GENERAL This book contains Start-Up, Controls Operation, Trouble- shooting and Service information for the 48/50A Series rooftop units. See Table 1. These units are equipped with Comfort Link™ controls. Use this guide in conjunction with the separate installation instructions packaged with the uni...

Page 4 - Scrolling Marquee —; ESCAPE; Fig. 1 — Scrolling Marquee; Fig. 2 — Accessory Navigator Display

4 System diagnostics are enhanced by the use of multiple external sensors for air temperatures, air pressures, refrigerant temperatures, and refrigerant pressures. Unit-mounted actua- tors provide digital feedback data to the unit control. The Comfort Link control system is fully communicating and c...

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