McQuay AGZXXXBS Series - Installation, Operation and Maintenance Manual; Default Chapter; Table of Contents

2 AGZ 026B through 130B IOMM AGZ-5
Table of Contents
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 Ambient33
Electrical Data - High Ambient......43
Dimensional Data ............................51
MicroTech II Controller .................54
Controller Section Table of Contents .........54
Overview....................................................55
General Description....................................55
Logging ......................................................59
Control Logic .............................................60
Chilled Water Pump Control ......................61
Compressor Control................................... 61
Condenser Fan Control.............................. 65
Optional Low Ambient VFD...................... 67
Using the Controller .................................. 77
Startup ..............................................91
Pre Start-up................................................ 91
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
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2002 McQuay International
Illustrations and data cover McQuay International products at the time of publication and we reserve the right to
make changes in design and construction at anytime without notice.
Our facilit
y
is ISO Certified
This manual also replaces
IOMM AGR-1