User Manual

Siemens Building Technologies Application : 78 RWD32/78 – 04.2001
HVAC Products RWD32 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, b = 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 ¤ 22.0c Cooling day set point.
Push + button
SP – c ¤ 22.0c SP – c b 32.0c Cooling night set point.
Push + button
SP – c b 32.0c X1 25.0c X1 - main temperature sensor reading
Push + button X1 25.0c X2 18.0C X2 – cooling analogue input value in Vdc to one decimal point.
Push + button X2 18.0C 3P 50% Percentage opening position of the heating control valve
Push + button 3P 50% Q1 OFF Q1 – cooling valve opening digital output
Push + button Q1 OFF Q2 OFF Q2 – cooling valve closing digital output
Push + button Q2 OFF MaxPrior 78
3P
Control sequence diagram and application number display.
Push + button Max Prior 78
3P
Q1 Q2 ¤ X1 Back to main display
Values shown are either default values or nominated for information only
Main Display