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McQuay
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AGZ100BS
McQuay AGZ100BS User Manual
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Inst
allati
on, Operati
on and Mai
ntenance Manual
IO
MM A
GZ
-
5
Group:
Chiller
Part Num
ber:
33041
1801
Effect
ive:
Octob
er 2004
Supercedes:
IOMM A
GZ
-
4
A
ir-Cooled Scroll Compressor Chiller
A
GZ 026B through 130B
60 Hertz, R-22
2
Table of Contents
Installation, Operation and Maintenance Manual
2
Default Chapter
2
Table of Contents
2
Introduction
3
General Description
3
Inspection
3
Nomenclature
3
Installation
4
Handling
4
Location
5
Vibration Isolators
12
Ambient and Water Flow Limitations
14
Water Piping
14
Flow Switch
16
Water Connections
17
System Water Volume Considerations
17
Variable Speed Pumping
17
Glycol Solutions
17
Evaporator Flow and Pressure Drop
21
Wind Baffles and Hail Guards
23
Optional Features
25
Physical Data
28
Electrical Data - Standard Ambient
33
Electrical Data - High Ambient
43
Dimensional Data
51
Microtech II Controller
54
Default Chapter
54
Controller Section Table of Contents
54
General Description
55
Inputs/Outputs
55
Overview
55
Setpoints
57
Shutdown Alarms
58
Logging
59
Limit Alarms
59
Control Logic
60
Chilled Water Pump Control
61
Compressor Control
61
Condenser Fan Control
65
Optional Low Ambient VFD
67
Using the Controller
68
Using the Controller
77
Getting Started
77
Menu Screens
78
Menu Matrix
80
View Screens Defined
81
Alarm Screens Defined
84
Set Screens Defined
84
Startup
91
Pre Start-Up
91
Shutdown
92
Water Piping Checkout
92
Refrigerant Piping Checkout
92
Electrical Check out
93
Operation
93
Hot Gas Bypass (Optional)
93
VFD Low Ambient Control (Optional)
94
Filter-Driers
94
System Adjustment
94
Liquid Line Sight Glass
94
Refrigerant Charging
95
Thermostatic Expansion Valve
95
Crankcase Heaters
95
Evaporator
95
Unit Maintenance
96
Preventive Maintenance Schedule
97
Service
98
Liquid Line Solenoid Valve
98
Evaporator
99
Refrigerant Charging
99
Warranty Statement
100
AGZ Troubleshooting Chart
101
4
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McQuay AGZ100BS Specifications
General
Tonnage
100 tons
Refrigerant
R-134a
Refrigerant Type
HFC
Compressor Type
Screw
Power Supply
460V/3Ph/60Hz
Cooling Capacity
1200 MBH
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