Owner's Manual

The heating coil connected to UO1 will activate only if
the coil on UO2 cannot fulfill the heating requirement by
itself.
Note that Regio has no input for monitoring fan status or
overheating of the heating coil. These functions must
instead be supplied by a SCADA system.
Setpoint adjustment
When in mode Occupied, the controller operates using a
heating setpoint (FS=22°C) or a cooling setpoint (FS=24°
C) that can be changed using the INCREASE and
DECREASE buttons.
Pressing INCREASE will increase the current setpoint by
0.5°C per press until the maximum offset (FI=+3°C) has
been reached. Pressing DECREASE will decrease the
current setpoint by 0.5°C per press until the maximum
offset (FI=-3°C) has been reached.
Switching between heating and cooling setpoints takes
place automatically in the controller depending on
heating or cooling requirements.
Built-in safety functions
RC-CDFO has an input for a condensation sensor to
detect moisture accumulation. If detected, the cooling
circuit will be stopped. The controller also has frost
protection. This prevents frost damages by ensuring that
the room temperature does not drop below 8°C when the
controller is in mode Off.
Supply air temperature limitation
AI1 can be configured for use with a supply air
temperature limitation sensor. A room controller will
then work together with a supply air temperature
controller using cascade control, resulting in a calculated
supply air temperature maintaining the room temperature
setpoint. It is possible to set individual min/max
limitation setpoints for heating and cooling. Settable
temperature range: 10…50°C.
Actuator exercise
All actuators are exercised, regardless of type or model.
The exercise takes place at intervals, settable in hours
(FS=23 hours interval). An opening signal is sent to the
actuator for as long time as its configured run time. A
closing signal is then sent for an equal amount of time,
after which the exercise is completed. Actuator exercise is
switched off if the interval is set to 0.
Fan control
RC-CDFO has a fan button used for setting the fan speed.
Pressing the fan button will cause the fan to move from its
current speed to the next.
The controller has the following positions:
Auto Automatic control of the fan speed to maintain
desired room temperature
0 Manually off
I Manual position with low speed
II Manual position with medium speed
III Manual position with high speed
Fig. 3 Fan button
In operating modes Off and Unoccupied, the fan is
stopped regardless of the display setting.
Manual fan control can be blocked, if desired.
Fan boost function
If there is a great difference between the room setpoint
and the current room temperature, or if one simply
wishes to hear the fan start, a boost function can be
activated to make the fan run at top speed for a short
start-up duration.
Fan kickstart
When using today’s energy-saving EC fans, there is always
a risk the fan will not start due to the low control voltage
preventing the fan from exceeding its starting torque. The
fan will then remain at a standstill while power still flows
through it, which may give rise to damage. To prevent
this, a fan kickstart function can be activated. The fan
HEAD OFFICE SWEDEN
Phone: [phone]
Web: www.regincontrols.com
E-mail: [e-mail]
RC-CDFO
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