McQuay AGS 475B Manuals

Manuals and User Guides for McQuay AGS 475B. We have 1 McQuay AGS 475B manual available for free PDF download: Operation Manual

McQuay AGS 475B Operation Manual

McQuay AGS 475B Operation Manual (66 pages)

GeneSys Air-Cooled Screw Compressor Chiller

Brand: McQuay | Category: Air Compressor | Size: 0 MB

Table of Contents

Table of Contents
2
Microtech II™ Features

4
General Description

5
Component Description

6
- Unit and Circuit Controller Description
  6
Control Operation

10
Circuit Controller

10
- Inputs/Outputs
  10
- Setpoints
  11
- Compressor Control
  15
- Condenser Fan Control
  19
- EXV Control
  21
- Evaporator Oil Return Line Control
  23
- Oil Heater Control
  23
- Interstage Injection
  23
Unit Controller

24
- Inputs/Outputs
  24
- Setpoints
  24
- Unit Enable
  26
- Unit Mode Selection
  27
- Evaporator Pump State Control
  30
- Evaporator Heater Control
  30
- Leaving Water Temperature (LWT) Reset
  30
Alarms and Events

33
- Alarm and Event Logging
  35
Using the Controller

37
- Security
  39
- Entering Passwords
  39
- Editing Setpoints
  39
- Clearing Alarms
  39
- Unit Controller Menus
  40
- Screen Definitions
  41
- SET Screen Definitions
  43
- Circuit Controller Menus
  47
- Screen Definitions
  47
Sequence of Operation

52
Start-Up and Shutdown

54
- Expansion Valve Operation
  55
- Extended (Seasonal) Shutdown
  57
- Evaporator Freeze Protection
  58
- Operating Limits
  59
Refrigerant Charging

60
Bas Interface

63
Field Wiring Diagram

64

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