Daikin AWV026 User Manual

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

Daikin AWV026 Specifications

General

Brand	Daikin
Model	AWV026
Category	Chiller
Language	English

Summary

Pre-Start Checklist

Introduction

Safety Warnings

Details hazards, warnings, and cautions for safe operation and handling.

Hazard Identification Information

Explains the meaning of DANGER, WARNING, and CAUTION symbols.

Receiving and Handling

Unit Placement

Clearance Requirements

Installation Case 5: Pit/Solid Wall Installation

Chilled Water Piping

Inlet Strainer Guidelines

Specifies requirements for installing an inlet water strainer.

Flow Switch

Evaporator Freeze Protection

Chilled Water Pump

Electrical Connections

Remote Evaporator Refrigerant Piping

Remote Evaporator Field Wiring

Remote Evaporator Piping Layout

Isolator Installation

Evaporator Pressure Drop Data

Controller Features

MicroTech® III Inputs/Outputs

Alarm/Limit Module

Set Points

Unit Level Set Points

Covers global set points for unit configuration and modes.

Dynamic Set Point Ranges

Details the adjustable ranges for various operational set points.

Circuit Level Set Points

Unit Mode Selection

Unit Control States

Low Ambient Lockout

Lockout and Stop Operation

Details the 'Lockout and Stop' operation mode.

Lockout Only Operation

Details the 'Lockout Only' operation mode.

Disabled Operation

Details the 'Disabled' operation mode.

Evaporator Pump Control

Freeze Protection

Pump Selection

Primary/Standby Pump Staging

Explains primary/standby pump staging logic.

Auto Control

Details the auto control logic for pump staging.

Unit Capacity Control

Staging Sequence

Load/Unload Sequence

Staging Circuits Off

Unit Capacity Limits

RapidRestore®

Circuit Functions

Saturated Condenser Temperature Limit

Circuit Availability

Circuit States

Compressor Control

Capacity Control

Condenser Fan Control

Saturated Condenser Temp Target

Staging Concept

Evaporator EXV Control

Economizer EXV Control

Circuit Capacity Overrides

High Water Temperature Capacity Limit

Explains the limit on circuit capacity due to high water temperature.

Alarm Logging

Description of Alarms

Unit Alarms

Evaporator Flow Loss

Evaporator Water Freeze Protect

Evaporator Water Temperatures Inverted

Evaporator LWT Sensor Fault

Evaporator EWT Sensor Fault

OAT Sensor Fault

Emergency Stop

AC Module Comm Failure

Evaporator Pump #1 Failure

Evaporator Pump #2 Failure

Circuit Alarms

Low Evaporator Pressure

Details the alarm for low evaporator pressure.

High Condenser Pressure

Low Pressure Difference Or Ratio

Mechanical Low Pressure Switch

Mechanical High Pressure Switch

High Discharge Temperature

High Oil Pressure Difference

High Motor Temperature

Compressor Multiple Start Failure

No Pressure At Start

Low Discharge Superheat

High Motor Current

High Compressor VFD Current

Compressor VFD Comm Failure

Compressor VFD Fault

CC Module Comm Failure

EEXV Module Comm Failure

Evaporator Pressure Sensor Fault

Oil Pressure Sensor Fault

Suction Temperature Sensor Fault

Discharge Temperature Sensor Fault

Evaporator EXV Motor Error

Economizer Pressure Sensor Fault

Economizer Temperature Sensor Fault

Economizer EXV Motor Error

DC Fan Motor Fault

Low Pressure Difference Or Ratio Shutdown

High Motor Current - Unload

High VFD Line Current Hold

High Motor Current – Hold

High VFD Line Current Unload

High VFD Temperature Hold

High VFD Temperature Unload

Compressor Start Failure

Unit Controller Operation

Navigating the Controller

HMI Keypad Navigation

Pre-startup

Startup

Startup After Extended (Seasonal) Shutdown

General System Maintenance

Oil Filter Removal and Renewal

Details the procedure for replacing the oil filter.

Oil Filter Replacement Procedure

Electrical Terminals

Cleaning Microchannel Aluminum Coils

Cleaning Epoxy Coated Coils

Routine Quarterly Cleaning of Epoxy Coil

Details the routine quarterly cleaning of epoxy coated coils.

Compressor VFD Inspection

Pump Operation

Preventative Maintenance Schedule

Limited Product Warranty