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Building automation
CE Compliant Dual Duct Controller Two Air Velocity Sensors Electronic Output Installation Instructions
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Table Of Contents
Overview
Hardware Inputs
Hardware Outputs
Ordering Notes
Sequence of Operation
Control Temperature Setpoints
Heating/Cooling Switchover
Day and Night Modes
Night Mode Override Switch
Control Loops
Calibration
Fail Mode Operation
Performing the Automated Fault Detection and Diagnostics
Application Notes
Wiring Diagram
Application 2521 Point Database
Sequence of
Operati
on
Wiring Diagr
am
13
Siemens Indus
try, Inc.
Applic
ation Note, App 2521
140
-
1218
2015
-
05
-
06
Wiring Diagr
am
Applicati
on 2520
and 2521 C
oolin
g Only Wir
ing Di
agram.
NOT
E:
There are
no exter
nal I/Os f
or the C
ooling O
nly Appl
ications
2520 an
d 2521
.
1
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15
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