2 AGZ 030A through 065A IOM 686
Table of Contents
Introduction.........................................3
General Description....................................... 3
Inspection ....................................................... 3
Installation...........................................4
Handling......................................................... 4
Location.......................................................... 5
Service Access................................................ 5
Vibration Isolators......................................... 6
Water Piping................................................... 7
Flow Switch................................................... 9
Water Connections......................................... 9
Refrigerant Charge......................................... 9
Superheat and Subcooling............................. 9
Glycol Solutions..........................................10
Evaporator Water Flow and Pressure Drop 11
Physical Data.....................................13
Electrical Data...................................16
Field Wiring .................................................16
Dimensional Data..............................28
AGZ Unit Check-out.........................29
Water piping checkout .................................29
Refrigerant piping checkout........................29
Electrical Check Out....................................29
AGZ Troubleshooting Chart........................30
Global UNT Controller Installation
and Operation....................................31
General Description.....................................31
Optional Sensors..........................................31
Pre Start-up ..................................................31
Start-Up........................................................31
Shutdown......................................................32
Sequence of Operation.................................33
Standard Controller Setpoints (optional Zone
Terminal required to change values)...........33
Software Description (Global UNT Interface
Kit required to read or change variables)....34
Hot Gas Bypass (Optional)..........................34
Combination Filter Drier.............................35
System Adjustment ......................................35
Liquid Sightglass and Moisture Indicator...35
Refrigerant Charging ...................................35
Thermostatic Expansion Valve....................35
Crankcase Heaters........................................36
Water Cooler................................................36
Controller Inputs /Outputs..........................38
Additional Global UNT Controller Features41
Alarms ..........................................................43
ZONE TERMINAL (optional)....................44
Zone Terminal Glossary...............................48
Global UNT Controller Troubleshooting
Chart.............................................................50
MicroTech Controller Installation
and Operation....................................51
General Description.....................................51
Optional Sensor Packages ...........................51
Installation....................................................51
Sequence of Operation.................................60
Start-Up and Shutdown................................62
Keypad / Display..........................................63
Menu Descriptions.......................................66
Trouble Analysis for the AGZ MicroTech
Controller.....................................................77
Test Procedures............................................79
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1997 McQuay International
"Illustrations cover the general appearance of McQuay International products at the time of publication and we
reserve the right to make changes in design and construction at anytime without notice"
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