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Dunham-Bush
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ACDS
Dunham-Bush ACDS User Manual
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Form No: M-M-0488A-0510
Products that perform...By people who care
R
134a
R
22
R
407C
ACD
S
50Hz
60Hz
INST
ALL
A
TION,
OPERA
TION &
MAINTENANCE
MANU
AL
INST
ALL
A
TION,
OPERA
TION &
MAINTENANCE
MANU
AL
MODEL:
AIR COOLED
SCROLL
DIRECT
EXP
ANSION
CHILLERS
R
410A
10 to 180 T
ons
(35 to 633 kW)
2
Table of Contents
Default Chapter
2
Table of Contents
2
1 Introduction
3
Physical Specifications
4
Physical Data
4
2 Installation
6
General
6
Inspection
6
Rigging
6
Rigging and Moving
6
Space Requirements and Clearance
6
General
7
Acds
7
Foundation
18
Air Cooled Units
18
Vibration Isolation
18
Piping Connection
21
Water Connections Chilled Water Piping
21
Water Connections Multiple Packaged Chillers
21
Water Quality
23
Electrical Connections
23
Request for Start-Up Representative
23
3 Operation
24
General
24
Unit Piping
24
Air Cooled Package Start-Up
24
System Start-Up
24
Lubrication
24
Oil Level
24
Oil Type
30
System Flow Rate
30
System Control
30
Capacity Control
30
Solid-State Operating Thermostat
30
4 Electrical
33
Electrical Data
33
IR32 Electronic Thermostat Front Panel
34
Typical Control Sequence with 2 Stage Operating Thermostat at 10°C Return Water Setpoint, 3.0°C Differential
34
Keypad Operation
35
IR32 Electronic Thermostat Parameter List
35
IR32 Electronic Thermostat Troubleshooting
37
Vision 2020I Controller and Terminal
38
DBG1 Operator Keypad
38
Status Reading
39
Authorization
41
Advanced User Key and Menu
41
Technician Key and Menu
41
Control Functions
44
Condenser Fan Control Logic
47
Air-Cooled Condenser Control Setpoints
47
Increasing Condenser Pressure
48
Decreasing Condenser Pressure
48
Master/Slave Control Sequence
48
Principle of Operation VIA DBLAN Communication Bus
49
Sequence of Operation
50
Vision 2020I Local Area Network (DBLAN)
50
Network Connection Diagram
51
Hardware Setting
51
Addressing the Vision 2020I Controller
51
Addressing the Vision 2020I DBG1 Terminal
52
Vision 2020I Controller LED Status
53
Typical Wiring Schematic
54
5 Maintenance
88
General
88
Periodic Inspection
88
Monthly Inspection
88
PHE Maintenance
88
Evaporator Cleaning
88
Air Cooled Condenser Cleaning
89
Electrical Malfunction
89
Refrigerant Charging
89
General
89
Air Cooled Package
89
Trouble Shooting
91
Sample Log Sheet
92
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Questions and Answers:
J
Julie Lee
Aug 1, 2025
What to do if my Dunham-Bush ACDS displays error Er2?
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Dunham-Bush ACDS Specifications
General
Brand
Dunham-Bush
Model
ACDS
Category
Chiller
Language
English
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