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Daikin Manuals
Chiller
AWV008
Installation, operation and maintenance manual
Daikin AWV008 Installation, Operation And Maintenance Manual
Air-cooled screw chillers 100 to 565 tons (350 to 1985 kw) hfc-134a refrigerant 60/50 hz
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Table Of Contents
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Contents
Table of Contents
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Table of Contents
Table of Contents
Pre-Start Checklist – Screw Chillers
Introduction
General Description
Nomenclature
Operating Limits for AWV Chillers
Nameplates
Receiving and Handling
Unit Placement
AWV Unit Rigging
Installation and Application Considerations
Spacing Guidelines for Sufficient Airflow
Service Access
Mounting Hole Access
Clearance Requirements
Building or Wall on One Side of Unit
Case 1 for AWV 008-010 Models
Two Units Side-By-Side
Three or more Units, Side-By-Side
Open Screening Walls
Pit/Solid Wall Installation
Allowable Wall Open Area
Pit Installation
Chilled Water Piping
Typical Chilled Water Piping, Braze Plate
Typical Chilled Water Piping, Shell and Tube Evaporator
Installing Inlet Strainer (Field-Installed Kit)
Strainer Sizing Data
System Water Volume
Inlet Strainer Guidelines
Flow Switch
Evaporator Freeze Protection
Chilled Water Pump
Variable Speed Pumping
Ice Mode
Glycol Solutions
Electrical Connections
Use with On-Site Generators
Generator Sizing
Transfer Back to Grid Power
Long Term Storage
Field Wiring Diagram - Single Point Power
Field Wiring Diagram - Multiple Point Power
Remote Evaporator Refrigerant Piping
Shipment Method
Performance Data
Remote Evaporator Field Wiring Notes
Piping Layout
Remote EXV Field Wiring
Piping Schematic, Remote Evaporator (One of Two Circuits)
Sizing Guidelines for Horizontal
Downflow Suction Lines and Liquid Lines
Recommended Horizontal or Downflow Suction Line Size
Recommended Liquid Line Size
Evaporator Data for AWV Remote Evaporator Models
Evaporator Model EV4027
Dimensions - Remote Evaporators
Evaporator Model EV5027
Evaporator Model EV5039
Evaporator Model EV6639
Evaporator Model EV6633
Reference Dimensional Drawing
Unit Dimensions by Configuration with Braze Plate Evaporator
Unit Dimensions by Configuration with Shell and Tube Evaporator
Isolator Installation
Rubber-In-Shear Isolator Schematic
Spring Isolator - 2 Spring Schematic
Mounting Location Reference Drawing
Evaporator Flow Limits
Pressure Drop Data
Operator Responsibilities
Operator Schools
Software Version
Controller Features
Controller Operation
System Architecture
Modbus Communication - Unit
Microtech III Inputs/Outputs
Economizer EXV Module
Alarm/Limit Module
Compressor Vfds
Rapidrestore Module
Set Points
Unit Level Set Points
Set Point Default and Range
Dynamic Set Point Ranges
Unit Test Mode Set Points
Administration and Service Support
Cool LWT Set Point Ranges
Fan VFD Configuration
Fan Staging Deadbands
Circuit Level Set Points
Circuit Test Mode Set Points
Calculations
Evaporator
Unit Enable
Unit Functions
Unit Control States
Unit Status
Unit Status Conditions
Ice Mode Start Delay
Low Ambient Lockout
Lockout and Stop Operation
Lockout Only Operation
Leaving Water Temp (LWT) Reset
Pump Selection
Primary/Standby Pump Staging
Freeze Protection
Unit Capacity Control
Maximum Circuits Running
Cool Mode Operation
Staging Sequence
Unit Capacity Limits
Demand Limit
Network Limit
Load Balancing
Operation Following Cycling of Power
Unit Level Changes
Circuit Level Changes
Feedback Capacity
Approach Values
Superheat Values
Circuit Functions
Circuit Availability
Circuit States
Oil Sump Check
Circuit Status
Compressor Control
Run Command Output
Cycle Timers
Condenser Fan Control
VR Solenoid Valve Control
Physical Fan Layout
Manual Speed Control
Saturated Condenser Temp Target
Minimum Target Value
Condenser Fan Control State
Fan Control – no VFD or 1St Fan VFD
Fan Outputs Per Fan Stage
Staging Concept
Staging up
Digital Outputs Energized for each Stage
VFD on 1St Fan of each Circuit
Fan Control - All Fans with VFD
Normal Control
Stage up Compensation
Evaporator EXV Control
Closed State
Preopen Operation
Pressure Control State
Operation – Closed State
Superheat Control State
Economizer EXV Control
MOP Control State
Liquid Line Solenoid Valve
High Water Temperature Capacity Limit
Circuit Capacity Overrides
Alarm Logging
Signaling Alarms
Clearing Alarms/Faults
Description of Alarms
Alarms and Events
Evaporator Water Temperatures Inverted
Evaporator LWT Sensor Fault
Evaporator Water Freeze Protect
Evaporator Flow Loss
OAT Sensor Fault
External Alarm
Emergency Stop
Evaporator EWT Sensor Fault
Circuit Alarms
Evaporator Pump #1 Failure
Economizer EXV Module Comm Failure
Bad Demand Limit Input
High Condenser Pressure
Low Pressure Difference or Ratio
Mechanical Low Pressure Switch
Mechanical High Pressure Switch
High Motor Temperature
Compressor Multiple Start Failure
High Oil Pressure Difference
High Discharge Temperature
Low Discharge Superheat
High Motor Current
High Compressor VFD Current
Compressor VFD Temperature High
CC Module Comm Failure
EEXV Module Comm Failure
Evaporator Pressure Sensor Fault
Condenser Pressure Sensor Fault
Discharge Temperature Sensor Fault
Evaporator EXV Motor Error
Power Loss While Running
Failed Pumpdown
Low Evaporator Pressure - Unload
Low Evaporator Pressure - Hold
DC Fan Motor Fault
Events
Low Pressure Difference or Ratio Shutdown
High Motor Current – Hold
High Motor Current - Unload
High VFD Line Current Hold
High VFD Temperature Hold
High VFD Temperature Unload
Compressor Start Failure
Unit Controller Operation
Navigating
Passwords
Typical Screen
Using the Controller
Example of Screen Menu
Navigation Mode
Edit Mode
HMI Keypad Navigation
Pre-Startup
Temporary Shutdown
Startup after Temporary Shutdown
Startup and Shutdown
Startup after Extended (Seasonal) Shutdown
Vibration Monitoring (Optional)
Lubrication
Oil Filter Removal and Renewal
System Maintenance
Oil Filter Housing Cover Plate
Fitting a New Oil Filter Element – Reassembly
All-Aluminum Condenser Coils
Electrical Terminals
Cleaning Microchannel Aluminum Coils
Remove Surface Loaded Fibers
Cleaning Epoxy Coated Coils
Routine Quarterly Cleaning of Epoxy Coil
Liquid Line Sight Glass
Lead-Lag
Pump Operation
Harsh Chemical and Acid Cleaners
Preventative Maintenance Schedule
Definitions
Active Set Point
Active Capacity Limit
Deadband
Appendix
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1
Nomenclature
2
General Description
3
Nameplates
Download this manual
Installation, Operation,
and Maintenance Manual
Pathfinder
®
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
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