Operating Instructions

Table of Contents
How to Use This Manual...............................................................................................V
Manual Organization ...............................................................................................V
Manual Conventions ...............................................................................................V
Manual Symbols......................................................................................................VI
Datamate Software .................................................................................................VI
Getting Help ............................................................................................................VI
Where To Send Comments.....................................................................................VI
Product Overview .........................................................................................................1
Introduction ................................................................................................................1
Ordering Notes........................................................................................................1
Hardware Inputs......................................................................................................3
Hardware Outputs ...................................................................................................3
Controller LED Indicators ........................................................................................4
Temperature Sensors .............................................................................................5
Actuators .................................................................................................................5
Applications...................................................................................................................7
Basic Operation .........................................................................................................7
Control Temperature Setpoints...............................................................................7
Day/Night Mode.......................................................................................................7
Night Mode Override Switch ...................................................................................7
Control Loops ..........................................................................................................7
Calibration ...............................................................................................................8
Heating and Cooling Switchover.............................................................................9
Electric Reheat........................................................................................................9
Compressor Operation............................................................................................9
Fan Operation .........................................................................................................9
Power Failure Recovery..........................................................................................10
Centralized Alarm Monitoring..................................................................................10
Overriding DOs........................................................................................................10
Fail-safe Operation..................................................................................................10
Using Auxiliary Points .............................................................................................10
Application 2273: Multiple Compressor Heat Pump with
Reversing Valve Control and Mixed Air Control ........................................................11
Compressor Staging ...............................................................................................11
Reversing Valve Operation .....................................................................................11
Application Notes ....................................................................................................11
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