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McQuay
Air Compressor
AGS 225D
McQuay AGS 225D User Manual
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OM AGSD-1
5
General Description
Control Panel Layout
The control panel is located on the front of the unit, t
o the left of the power panel.
Figure 1, Control Panel Components
Expansion Valve
Drivers
Circuit Breakers
MicroTech II
Controller, CP1
MicroTech II Controller,
CP2,
On Three-Compressor
Units Only
Switches & Fuses
Terminal Blocks
4
6
Table of Contents
Default Chapter
2
Table of Contents
2
Controller Features
4
General Description
5
Control Panel Layout
5
Definitions
6
Component Description
9
Hardware Structure
9
System Architecture
10
Sequence of Operation
11
Controller Operation
17
CP1 Inputs/Outputs
17
Analog Inputs
17
Analog Outputs
17
Expansion I/O Controller 1
18
Expansion I/O Controller 4
19
Expansion I/O Controller 3
19
Controller CP2
20
Expansion I/O Controller 5
21
Expansion I/O Controller 8
22
Setpoints
22
Controller Functions
26
Parameter Definitions
26
Unit Enable
26
Unit Mode Selection
28
Unit States
29
Ice Mode Start Delay
30
Evaporator Pump Control
30
Leaving Water Temperature (LWT) Reset
31
Unit Capacity Overrides
33
Building Automation System Interface
34
Circuit Functions
39
Calculations
39
Compressor Control
40
Condenser Fan Control
45
EXV Control
47
Economizer Control
50
Alarms and Events
51
Unit Stop Alarms
51
Unit Events
52
Circuit Stop Alarms
52
Circuit Events
56
Alarm Logging
57
Event Logging
57
Using the Controller
58
Security
60
Editing Setpoints
61
Clearing Alarms
61
Unit Controller (CP1) Screens
61
Editing Review
73
Start-Up and Shutdown
74
Temporary Shutdown
74
Extended (Seasonal) Shutdown
75
Field Wiring Diagram
78
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McQuay AGS 225D Specifications
General
Brand
McQuay
Model
AGS 225D
Category
Air Compressor
Language
English
Related product manuals
McQuay AGS 230A' AGS 230B
66 pages
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