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Daikin AWV016 User Manual

Daikin AWV016
92 pages
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Installation, Operation,
and Maintenance Manual
Pathnder
®
Air-cooled Screw Chillers
Model AWV
100 to 565 Tons (350 to 1985 kW)
HFC-134a Refrigerant
60/50 Hz
IOM 1242-2
Group: Chiller
Part Number: IOM1242-2
Date: August 2018

Table of Contents

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Daikin AWV016 Specifications

General IconGeneral
BrandDaikin
ModelAWV016
CategoryChiller
LanguageEnglish

Summary

INTRODUCTION

Hazard Identification

Describes DANGER, WARNING, and CAUTION symbols for hazardous situations.

INSTALLATION AND APPLICATION CONSIDERATIONS

Clearance Requirements

Specifies minimum clearances for unit airflow and service access.

Chilled Water Piping

Provides guidelines for installing chilled water piping systems.

Evaporator Freeze Protection

Describes methods and recommendations for preventing evaporator freeze-up.

Chilled Water Pump

Details requirements for controlling chilled water pumps with the chiller.

Electrical Connections

Covers requirements and safety precautions for electrical wiring.

INSTALLATION AND APPLICATION CONSIDERATIONS - REMOTE EVAPORATORS

Remote Evaporator Refrigerant Piping

Provides guidelines for designing and sizing refrigerant piping.

Piping Layout

Shows recommended piping layouts for remote evaporator configurations.

PRESSURE DROP DATA

CONTROLLER OPERATION

MicroTech® III Inputs/Outputs

Details the inputs and outputs for the MicroTech® III controller modules.

Set Points

General information about controller set points and their adjustment.

Dynamic Set Point Ranges

Lists available ranges for various set points based on operating modes.

Circuit Level Set Points

Configuration parameters applicable to individual chiller circuits.

UNIT FUNCTIONS

Low Ambient Lockout

Details the chiller's response to low ambient outdoor temperatures.

Evaporator Pump Control

Describes the control states for the evaporator pumps.

Freeze Protection

Explains how the system protects the evaporator from freezing.

Unit Capacity Control

Details how compressor staging and loading control unit capacity.

CIRCUIT FUNCTIONS

High Motor Current Limits

Defines limits for maximum motor current based on VFD and rated values.

Compressor Control

Explains how the compressor is controlled via VFD and solenoids.

Condenser Fan Control

Explains fan control based on Fan VFD Configuration set point.

Fan Control - All Fans with VFD

Describes control logic for units with all fans using VFDs.

Evaporator EXV Control

Outlines the positioning logic for the Evaporator EXV.

Economizer EXV Control

Describes the activation and modulation of the economizer circuit using EXV.

High Water Temperature Capacity Limit

Limits circuit capacity when evaporator LWT is high.

ALARMS AND EVENTS

Description of Alarms

Explains the format and content of the alarm description tables.

Evaporator Flow Loss

Details the alarm triggered by loss of evaporator water flow.

Evaporator Water Freeze Protect

Describes the alarm for evaporator water temperature reaching freezing point.

Evaporator LWT Sensor Fault

Details the alarm for a faulty Leaving Water Temperature sensor.

Evaporator EWT Sensor Fault

Details the alarm for a faulty Entering Water Temperature sensor.

OAT Sensor Fault

Details the alarm for a faulty Outside Air Temperature sensor.

Emergency Stop

Details the alarm triggered by the emergency stop switch.

Evaporator Pump #1 Failure

Alarm indicating failure of Evaporator Pump #1.

Low Evaporator Pressure

Alarm triggered by low evaporator pressure under specific conditions.

High Condenser Pressure

Alarm triggered by high condenser pressure based on temperature.

Mechanical Low Pressure Switch

Alarm indicating activation of the mechanical low pressure switch.

Mechanical High Pressure Switch

Alarm indicating activation of the mechanical high pressure switch.

High Discharge Temperature

Alarm triggered by discharge temperature exceeding set point.

High Motor Temperature

Alarm indicating high motor temperature reported by VFD.

Compressor Multiple Start Failure

Alarm for repeated compressor start failures within a time period.

No Pressure At Start

Alarm triggered if pressure is too low during circuit start.

Low Discharge Superheat

Alarm triggered by low discharge superheat for an extended period.

High Motor Current

Alarm triggered by motor current exceeding limits.

Compressor VFD Fault

Alarm triggered by general faults reported by the VFD.

Condenser Pressure Sensor Fault

Alarm for a faulty condenser pressure sensor.

Evaporator Pressure Sensor Fault

Alarm for a faulty evaporator pressure sensor.

Suction Temperature Sensor Fault

Alarm for a faulty suction temperature sensor.

Discharge Temperature Sensor Fault

Alarm for a faulty discharge temperature sensor.

Evaporator EXV Motor Error

Alarm for motor error in the Evaporator EXV module.

Economizer Pressure Sensor Fault

Alarm for a faulty economizer pressure sensor.

Economizer Temperature Sensor Fault

Alarm for a faulty economizer temperature sensor.

Compressor Start Failure

Alarm triggered by repeated compressor start failures.

STARTUP AND SHUTDOWN

SYSTEM MAINTENANCE

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