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Daikin AWV020 User Manual

Daikin AWV020
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 AWV020 Specifications

General IconGeneral
BrandDaikin
ModelAWV020
CategoryChiller
LanguageEnglish

Summary

Pre-Start Checklist - Screw Chillers

INSTALLATION AND APPLICATION CONSIDERATIONS

Chilled Water Piping

Details requirements and recommendations for connecting chilled water piping.

Electrical Connections

Covers requirements for electrical wiring, safety, and compliance with codes.

INSTALLATION AND APPLICATION CONSIDERATIONS - REMOTE EVAPORATORS

Remote Evaporator Refrigerant Piping

Offers guidance on designing and installing refrigerant piping for remote evaporators.

PRESSURE DROP DATA

CONTROLLER OPERATION

Set Points

Unit Level Set Points

Details the adjustable set points for the overall unit configuration.

Circuit Level Set Points

UNIT FUNCTIONS

Freeze Protection

Details methods and logic for protecting the evaporator from freezing.

Unit Capacity Control

Describes how the unit manages capacity through compressor staging and loading.

CIRCUIT FUNCTIONS

Compressor Control

Explains how compressors are controlled via VFDs, solenoids, and logic.

Condenser Fan Control

Details how condenser fans are controlled based on VFD configuration and staging.

Evaporator EXV Control

Outlines the logic for positioning the Evaporator EXV based on pressure and superheat.

ALARMS AND EVENTS

Evaporator Flow Loss

Describes the conditions and actions for the Evaporator Flow Loss alarm.

Low Evaporator Pressure

Details the alarm conditions related to low evaporator pressure.

High Discharge Temperature

Explains the alarm triggered by high discharge temperatures.

High Motor Temperature

Describes the alarm for high motor temperatures detected by the VFD.

Low Discharge Superheat

Details the alarm for low discharge superheat conditions.

High Motor Current

Explains the alarm for high motor current readings.

USING THE CONTROLLER

STARTUP AND SHUTDOWN

SYSTEM MAINTENANCE

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