User Manual

Siemens Building Technologies Application :53 RWD82/53 - 05.2001
HVAC Products RWD82 3
The main display shows ,
a) Whether Q1 is On or Off ( = off, = on )
b) Whether Q2 is On or Off ( = off, = on )
c) Whether day or night set point is selected. (
¤ = day,  = night)
d) X1 value ( room temperature) in ° C.
Other displays are available by pressing the + button, and the various
displays are listed below in sequence from the main display.
On entering any of the four set point displays, the setpoint on display can be
adjusted by pushing the enter/save button, increase value by pressing the
+ button or decrease the value by pressing the – button, and when the
required value is reached, press the enter/save button to save the new
value.
The alternative displays return to the main display after 20 seconds duration.
Press
buttons
Action Current display Selected display Selected display comments
Push + button
Q1 Q2 ¤ X1 SP – c ¤ 25.0c cooling day set point.
Push + button SP – c ¤ 25.0c SP – c  16.0c cooling night set point.
Push + button SP – c  16.0c X1 18.0c X1 - main temperature sensor reading
Push + button X1 18.0c X2 15.0c X2 - actual limit temperature sensor reading
Push + button X2 15.0c Q1 ON Q1 – chilled water pump digital output, display on or off.
Push + button Q1 ON Q2 ON Q2 – chilled water valve digital output, display on or off.
Push + button Q2 ON LIM 53
REL
Control sequence diagram and application number display.
Push + button LIM 53
REL
Q1 Q2 ¤ X1 Back to main display
Values shown are either default values or nominated for information only