OMM 1166-1
AGZ 025D through 190D
13
MicroTech
III Controller
Controller Section Table of Contents
Overview ........................................................................................................................14
Controller Inputs and Outputs .......................................................................................14
Setpoints ........................................................................................................................16
Security ..........................................................................................................................20
Unit Control Functions ..................................................................................................20
Unit Enable ....................................................................................................................21
Unit Mode Selection ......................................................................................................22
Unit States ......................................................................................................................22
Start Delays ....................................................................................................................23
Evaporator Pump Control ..............................................................................................24
Leaving Water Temperature (LWT) Reset/Target .........................................................25
Unit Capacity Control ....................................................................................................26
Unit Capacity Overrides……………………………………………………………….27
Circuit Control Functions ..............................................................................................29
Circuit Control Logic .....................................................................................................29
Pumpdown Procedure ....................................................................................................31
Compressor Control .......................................................................................................31
Condenser Fan Control ..................................................................................................32
EXV Control ..................................................................................................................34
Liquid Line Solenoid .....................................................................................................35
Hot Gas Bypass Solenoid ..............................................................................................35
Alarms ............................................................................................................................35
Events…………………………………………………………………………....…….41
Clearing Alarms .............................................................................................................43
Using the Controller…………………………………………………………………...44
Summary of Contents for AGZ 190D
Page 12: ...12 AGZ 025D through 190D OMM 1166 1 Figure 2 Typical Field Control Wiring...
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