Siemens 125-1957 owner manual Table of Contents

Table of Contents
How To Use This Manual	iv
Manual Organization	iv
Manual Conventions	v
Manual Symbols	v
Datamate Software	v
Getting Help	vi
Where To Send Comments	vi
Product Overview	1
Introduction	1
Ordering Notes	1
Hardware Inputs	2
Hardware Outputs	3
Controller LED Indicators	4
Temperature Sensors	4
Actuators	5
Applications	6
Basic Operation	6
Control Temperature Setpoints	6
Day/Night Mode	6
Valve Configuration	7
Heating and Cooling Switchover	7
Control Loops	7
Morning Warm-up/Cool-down	8
ON/OFF Coil Valve Control	8
Electric Heat	8
Fan Operation	8
Fail-safe Operation	8
Application 2281 – Heating and/or Chilled Water Cooling, ASHRAE Cycles I and II . 10
Application 2283 – Heating and/or Chilled Water Cooling, ASHRAE Cycle III	13
Application 2284 – Heating and DX Cooling, ASHRAE Cycles I and II	16
Application 2286 - Heating and DX Cooling, ASHRAE Cycle III	18
Application 2287 – Heating and Cooling, Nesbitt Cycle W	20
Overview	20
Application 2299 – Slave Mode	22
Overview	22

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