Carrier Air Conditioner - Manual

Carrier Air Conditioner

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Table of Contents:

  • Page 4 – It is important when connecting to a CCN communication; Table 2 — Thermistor Designations
  • Page 10 – Fig. 5 — Main Base Board
  • Page 11 – The electronic control uses 4 to 10 thermistors; AWG; EXV
  • Page 12 – Fig. 8 — Thermistor T3 and T4 Locations
  • Page 13 – EXV —
  • Page 14 – Fig. 11 — Typical Space Temperature
  • Page 16 – Capacity Control —
  • Page 17 – The capacity control algorithm runs every 30 seconds. The; TEST; Fig. 16 — Energy Management Module
  • Page 18 – Table 5A — Part Load Data Percent Displacement, Standard Units
  • Page 19 – Table 5A — Part Load Data Percent Displacement, Standard Units (cont)
  • Page 26 – Table 6 — Required Hardware for Additional Unloaders
  • Page 27 – The pumpout cycle starts immediately upon starting the; DEADBAND EXAMPLE; Fig. 17 — Deadband Multiplier; LWT —
  • Page 28 – Fig. 18 — Condenser Fan Sequence
  • Page 29 – ESCAPE; Fig. 19 — Scrolling Marquee Display
  • Page 30 – Table 7 — Marquee Display Menu Structure; Fig. 20 — Dual Chiller Thermistor Location
  • Page 31 – Table 8 — Run Status Mode and Sub-Mode Directory
  • Page 32 – Table 9 — Service Test Mode and Sub-Mode Directory
  • Page 42 – Table 23 — Operating Modes; ITEM EXPANSION
  • Page 43 – Temperature Reset —; The control system is capable of; Fig. 21 — Standard Chilled Fluid
  • Page 44 – Table 26 — Configuring Temperature Reset; The following are examples of outdoor air and space tem-
  • Page 45 – A field supplied; Table 27 — Menu Configuration of 4 to 20 mA Cooling Set Point Control
  • Page 46 – Demand Limit —; Demand Limit is a feature that allows; Table 28 — Configuring Demand Limit
  • Page 47 – Fig. 23 — 4 to 20 mA Demand Limiting
  • Page 48 – Alarms and Alerts —
  • Page 49 – Table 29 — Alarm and Alert Codes
  • Page 53 – Table 30 — Oil Charge; Do not reuse drained oil or any oil that has been exposed to; Cooler —; COMPRESSOR
  • Page 54 – Fig. 24 — Cooler Thermistor Locations
  • Page 56 – Condenser Coils; Fig. 27 — Cooler Head Bolt Tightening Sequence (Typical Tube Sheet)
  • Page 57 – Enviro-ShieldTM Coil Cleaner Application Equipment; Condenser Fans —; DIMENSION
  • Page 58 – Refrigerant Feed Components —; Fig. 31 — Printed Circuit Board Connector
  • Page 59 – Thermistors —; Fig. 33 — Thermistor Connections to J5 and J8; LWT
  • Page 60 – Table 32A — 5K Thermistor Temperature (F) vs Resistance/Voltage; VOLTAGE DROP B FOR THERMISTORS T3-T6
  • Page 64 – Safety Devices —; Table 34 — Pressure Switch Settings,; SWITCH; Fig. 34 — Cooler Heater Cables
  • Page 65 – Fig. 35 — Compressor Connections
  • Page 66 – START-UP AND OPERATION; Actual start-up should be done only; Operating Limitations; Table 35 — Temperature Limits for Standard Units
  • Page 67 – Operation Sequence —
  • Page 68 – PLUG; Fig. 36 — Accessory Sensor
  • Page 71 – APPENDIX A — CCN TABLES
  • Page 73 – RESETCON (Temperature Reset and Demand Limit)
  • Page 79 – WSM EQUIPMENT PART COOL SOURCE MAINTENANCE TABLE; SUPERVISOR MAINTENANCE TABLE; OCCUPANCY MAINTENANCE TABLE; OCCUPANCY SUPERVISORY
  • Page 80 – APPENDIX B — FLUID DROP PRESSURE CURVES; ENGLISH AND SI
  • Page 81 – APPENDIX B — FLUID DROP PRESSURE CURVES (cont); ENGLISH; COOLER PRESSURE DROP KEY
  • Page 83 – Cooler Fluid Pressure Drop Curves — 30GUN,GUR230B-315B
  • Page 88 – SERVICE TRAINING
  • Page 89 – START-UP CHECKLIST FOR; COMFORT; LINKTM CHILLER SYSTEMS
  • Page 90 – B. Preliminary Equipment Check; CHECK AIR SYSTEMS
  • Page 94 – RECORD CONFIGURATION INFORMATION BELOW:; SETPOINT; TEMPERATURE
  • Page 96 – CIRCUIT A
Loading the manual

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

PC 903

Catalog No. 563-025

Printed in U.S.A.

Form 30GTN-3T

Pg 1

3-00

Replaces: 30GTN-2T

Book 2

Tab

5c

Controls Start-Up, Operation,

Service, and Troubleshooting

SAFETY CONSIDERATIONS

Installing, starting up, and servicing this equipment can be

hazardous due to system pressures, electrical components, and
equipment location (roof, elevated structures, etc.). Only
trained, qualified installers and service mechanics should in-
stall, start up, and service this equipment.

When working on this equipment, observe precautions in

the literature, and on tags, stickers, and labels attached to the
equipment, and any other safety precautions that apply. Follow
all safety codes. Wear safety glasses and work gloves. Use care
in handling, rigging, and setting this equipment, and in han-
dling all electrical components.

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . 1

GENERAL

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

INTRODUCTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3

MAJOR SYSTEM COMPONENTS

. . . . . . . . . . . . . . 3-10

General

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

Main Base Board (MBB)

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

Expansion Valve (EXV) Board

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

Compressor Expansion Board (CXB)

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

Scrolling Marquee Display

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

Energy Management Module (EMM)

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

Enable/Off/Remote Contact Switch

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

Emergency On/Off Switch

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

Reset Button

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

Board Addresses

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

Control Module Communication

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

Carrier Comfort Network Interface

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

OPERATING DATA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-47

Sensors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

• T1 — COOLER LEAVING FLUID SENSOR
• T2 — COOLER ENTERING FLUID SENSOR
• T3,T4 — SATURATED CONDENSING

TEMPERATURE SENSORS

• T5,T6 — COOLER SUCTION TEMPERATURE

SENSORS

• T7,T8 — COMPRESSOR SUCTION GAS

TEMPERATURE SENSORS

• T9 — OUTDOOR-AIR TEMPERATURE SENSOR
• T10 — REMOTE SPACE TEMPERATURE SENSOR

Thermostatic Expansion Valves (TXV)

. . . . . . . . . . . 15

Compressor Protection Control System

(CPCS) or Control Relay (CR)

. . . . . . . . . . . . . . . . . 15

Compressor Ground Current Protection Board

(CGF) and Control Relay (CR)

. . . . . . . . . . . . . . . . . 15

Electronic Expansion Valve (EXV)

. . . . . . . . . . . . . . . 16

Energy Management Module

. . . . . . . . . . . . . . . . . . . . 16

Capacity Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

• ADDING ADDITIONAL UNLOADERS
• MINUTES LEFT FOR START
• MINUTES OFF TIME
• LOADING SEQUENCE

Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation and ser-
vice. There may be more than one disconnect switch. Tag
all disconnect locations to alert others not to restore power
until work is completed.

This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out com-
ponents, or to bypass or otherwise depart from recom-
mended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.

To prevent potential damage to heat exchanger tubes
always run fluid through heat exchangers when adding or
removing refrigerant charge. Use appropriate brine solu-
tions in cooler fluid loops to prevent the freezing of heat
exchangers when the equipment is exposed to temperatures
below 32 F (0° C).
DO NOT VENT refrigerant relief valves within a building.
Outlet from relief valves must be vented outdoors in accor-
dance with the latest edition of ANSI/ASHRAE (American
National Standards Institute/American Society of Heating,
Refrigeration and Air Conditioning Engineers) 15 (Safety
Code for Mechanical Refrigeration). The accumulation of
refrigerant in an enclosed space can displace oxygen and
cause asphyxiation. Provide adequate ventilation in
enclosed or low overhead areas. Inhalation of high concen-
trations of vapor is harmful and may cause heart irregulari-
ties, unconsciousness or death. Misuse can be fatal. Vapor
is heavier than air and reduces the amount of oxygen avail-
able for breathing. Product causes eye and skin irritation.
Decomposition products are hazardous.

DO NOT attempt to unbraze factory joints when servicing
this equipment. Compressor oil is flammable and there is
no way to detect how much oil may be in any of the refrig-
erant lines. Cut lines with a tubing cutter as required when
performing service. Use a pan to catch any oil that may
come out of the lines and as a gage for how much oil to add
to system. DO NOT re-use compressor oil.

30GTN,GTR040-420

30GUN,GUR040-420

Air-Cooled Reciprocating Liquid Chillers

with

Comfort

Link™ Controls

50/60 Hz

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Summary

Page 4 - It is important when connecting to a CCN communication; Table 2 — Thermistor Designations

4 Control Module Communication RED LED — Proper operation of the control boards can bevisually checked by looking at the red status LEDs (light-emitting diodes). When operating correctly, the red statusLEDs should be blinking in unison at a rate of once every2 seconds. If the red LEDs are not blinki...

Page 10 - Fig. 5 — Main Base Board

10 CEPL130346-01 STATUS LEN J1 J2 J4 J3 J5 J6 J7 J8 J9 J10 CCN RED LED - STATUS GREEN LED -LEN (LOCAL EQUIPMENT NETWORK) YELLOW LED -CCN (CARRIER COMFORT NETWORK) INSTANCE JUMPER EMERGENCY ON/OFFSWITCH ENABLE/OFF/REMOTECONTACT SWITCH GFI-CONVENIENCEOUTLET ACCESSORYON 208/230V 460 AND575V ONLY RESET ...

Page 11 - The electronic control uses 4 to 10 thermistors; AWG; EXV

11 OPERATING DATA Sensors — The electronic control uses 4 to 10 thermistors to sense temperatures for controlling chiller operation. SeeTable 2. These sensors are outlined below. See Fig. 7-10 forthermistor locations. Thermistors T1-T9 are 5 k Ω at 77 F (25 C). Thermistors T1, T2, T3-T6 and T7-T9 ha...

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