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125-1957
Siemens 125-1957
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Application 2283 – Heating and/or
Chilled Water Cooling, ASHRAE Cycle III
Siemens Building Technologies, Inc.
15
Figure 12. Application 2283 Control Draw
ing.
Figure 13. Application 2283 Control Draw
ing.
24
26
Table of Contents
Main Page
Default Chapter
5
Table of Contents
5
How to Use this Manual
8
Manual Organization
8
Manual Conventions
9
Manual Symbols
9
Datamate Software
9
Getting Help
10
Where to Send Comments
10
Product Overview
11
Introduction
11
Ordering Notes
11
Hardware Inputs
12
Apogee Unit Vent Controller
12
Hardware Outputs
13
Power Wiring
13
Communication Wiring
13
Controller LED Indicators
14
Temperature Sensors
14
Actuators
15
Related Equipment
15
Applications
16
Basic Operation
16
Control Temperature Setpoints
16
Day/Night Mode
16
Valve Configuration
17
Heating and Cooling Switchover
17
Control Loops
17
Night Mode Override Switch
17
Morning Warm-Up/Cool-Down
18
ON/OFF Coil Valve Control
18
Electric Heat
18
Fan Operation
18
Fail-Safe Operation
18
Application 2281 - Heating And/Or Chilled Water Cooling, ASHRAE Cycles I and
20
Application 2283 - Heating And/Or Chilled Water Cooling, ASHRAE Cycle III
23
Application 2284 - Heating and DX Cooling, ASHRAE Cycles I and II
26
Application 2286 - Heating and DX Cooling, ASHRAE Cycle III
28
Application 2287 - Heating and Cooling, Nesbitt Cycle W
30
Overview
30
Application 2299 - Slave Mode
32
Overview
32
Point Database
33
Troubleshooting
41
Overview
41
Basic Service Information
41
Ordering Replacement Parts
42
Preventive Maintenance
42
Safety Features
42
Controller Leds
42
Glossary
43
Overview
43
Centralized Control
43
Control Loop
43
English Units
44
Equipment Controller
44
Field Panel
44
Safety Features
48
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