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Document No. 129-491
Installation Instructions
October 6, 2009
Dimensions
Operating Instructions
Figure 10. Components.
Normal Operation
The +/- buttons allow you to increase or
decrease the current room temperature
setpoint in steps of 1°F (0.5°C).
To do this, proceed as follows:
•
Press
The setpoint display starts flashing.
•
Press the buttons again to change the
room temperature setpoint.
•
The new temperature setpoint will
automatically be stored 10 seconds after
the last adjustment is made. The display
will then stop flashing.
Page 4 of 7
Figure 9. Dimensions in Inches (Millimeters).
or
once
Changing from Heating to Cooling Mode
/
he Operating Mode Selector on the
T
RDU50.2U changes the mode from Heating to
Cooling.
Display shows that the heating output is active.
Display shows that the cooling output is active.
Changing from Normal Operation to Energy Saving
Mode
Changeover from normal operation to Energy
/
Saving mode occurs automatically via an
external contact such as a card access switch,
window contact switch, remote operation
switch, etc.
NOTE: When the RDU50.2U is in Off mode,
this changeover will not occur.
Display shows normal operation.
Display shows Energy Saving mode.
Energy Saving Mode
To change the factory-set temperature setpoints
of 61°F (16°C) for heating and 82°F (28°C) for
cooling, see Changing the Control Parameters.
CAUTION:
The Energy Saving mode setpoint can be set to
Off (the parameter display shows Off), which
could result in freeze conditions.
Inches (mm)
Siemens Industry, Inc.
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