Regin REGIO RC-DFO User manual

RC-DFO
RC-DFO
Room controllers with display, fan button and
manual forced ventilation function
RC-DFO is a room controller from the Regio Mini series
intended to control heating and cooling in a single zone.
RC-DFO is a room controller in the Regio series. It has a
button for three-speed fan control (fan-coil) and a display.
The controller does not have a communication port.
Regio
Regio is an extensive range of controllers for control of
heating and cooling.
The controllers are divided into three different series;
Mini, Midi and Maxi. The Midi range consists of
pre-programmed controllers with communication.
Maxi consists of freely programmable controllers
with communication. The Mini controller range, of
which RC-DFO is a part, consists of pre-programmed,
stand-alone controllers.
Applications
The Regio controllers are suitable for use in buildings
requiring optimum comfort and reduced energy
consumption, such as offices, schools, shopping centres,
airports, hotels and hospitals.
See application example on page 3.
Sensor
The controller has a built-in sensor. An external sensor for
room temperature or change-over can also be connected
(PT1000).
Actuators
RC-DFO can control 0...10 V DC valve actuators and/or
24 V AC thermal actuators.
Easy to install
The modular design, featuring a separate bottom plate for
wiring, makes the entire Regio range of controllers easy to
install and commission. The bottom plate can be put into
place before the electronics are installed. Mounting takes
place directly on the wall or on an electrical connection
box.
revision
12 2016
Short facts about RC-DFO
• Easy installation
• Built-in function for forced ventilation
• On/Off or 0...10 V control
• Input for occupancy detector, window contact,
condensation detector and change-over
function

2
RC-DFO
Display handling
The display has the following indications:
The buttons on the controller enables easy setting of
parameter values using a parameter menu shown in
the display. The parameter values are changed with
the INCREASE and DECREASE buttons and changes
confirmed with the occupancy button.
Control modes
RC-DFO can be configured for different control modes/
control sequences:
• Heating
• Heating or Cooling via change-over function
• Heating/Heating
• Heating/Cooling
• Heating/Cooling with VAV-control and forced
supply air function
• Heating/Cooling with VAV-control
• Cooling
• Cooling/Cooling
Operating modes
There are five different operating modes: Off, Unoccupied,
Stand-by, Occupied and Bypass. Occupied is the preset
operating mode. It can be set to Stand-by using the
parameter menu in the display. The operating modes can
be activated via an occupancy detector or the occupancy
button.
Off: Heating and cooling are disconnected. However, frost
protection is still active (factory setting (FS) = 8°C). This
mode is activated if a window is opened.
Unoccupied: The room in which the controller is placed
is not used for a extended time period, such as during
holidays or long weekends. Both heating and cooling are
kept within a temperature interval with configurable
min/max temperatures (FS min = 15°C, max = 30°C).
Stand-by: The room is in an energy saving mode and is
not used at the moment. This can, for instance, be during
nights, weekends and evenings. The controller stands
by to change operating mode to Occupied if presence
is detected. Both heating and cooling are disconnected
within a temperature interval surrounding the current
setpoint (FS heating setpoint = -3°C, cooling setpoint =
+3°C).
Occupied: The room is in use and a comfort mode is
activated. The controller maintains the temperature
around a heating setpoint (FS = 22°C) and a cooling
setpoint (FS = 24°C).
Bypass: The temperature in the room is controlled in the
same way as in the Occupied operating mode. The output
for forced ventilation is also active. This operating mode
is useful for instance in conference rooms, where many
people are present at the same time for a certain period
of time.
When Bypass has been activated by pressing the
occupancy button, the controller will automatically
return to its preset operating mode (Occupied or
Stand-by) after a configurable time has elapsed (FS = 2
hours). If an occupancy detector is used, the controller
will automatically return to its preset operating mode if
no occupancy is detected for 10 minutes.
Occupancy detector
By connecting an occupancy detector, RC-DFO can
switch between the Bypass operating mode and its preset
operating mode (Occupied or Stand-by). This way, the
temperature is controlled from requirement, making it
possible to save energy while maintaining the temperature
at a comfortable level.
The occupancy button
Pressing the occupancy button for less than 5 seconds
when the controller is in its preset operating mode will
cause it to change to operating mode Bypass. A short
press of the button when the controller is in Bypass mode
will cause it to revert to the preset operating mode.
If the occupancy button is pressed for more than 5
seconds will change the controller’s operating mode to
”Shutdown” (Off/Unoccupied) regardless of its current
operating mode. The display enables selecting which
operating mode, Off or Unoccupied, should be activated
on ”Shutdown” (FS = Unoccupied). A short press when in
Shutdown mode will return the controller to Bypass.
Forced ventilation
Regio has a built-in function for forced ventilation. A
closing of the digital occupancy detector input will set
the controller to Bypass mode and activate the output
for forced ventilation (DO1). This can for instance be
used to open a damper. This function is terminated when
the settable forcing interval (10 min.) has run out. The
function can also be activated at the press of a button.
Forced ventilation
Changeable value
Fan
Auto/Man.
indication
for the fan
Current
fan speed
(0, 1, 2, 3)
Occupancy
indication
Open window
Indoor /
outdoor
temp.
Setpoint
Current room
temperature in
°C to one
decimal point
COOL/HEAT: Shows if
the unit controls
according to the heating
or cooling setpoint
OFF:
Unoccupied
(also shows
temperature)
or O󰀨
indication
(only OFF)
STANDBY:
Standby indication
SERVICE:
Setting parameters
INCREASE
DECREASE
FAN BUTTON
Occupancy button

3
RC-DFO
Change-over function
RC-DFO has an input for change-over that automatically
resets output UO1 to operate with heating or cooling
function. A PT1000 type sensor can be connected and
mounted so that it monitors the supply temperature of
the heating coil.
The output function is set to Heating when the fluid
temperature exceeds 22°C and to Cooling when the
temperature falls below 18°C.
Alternatively, a potential-free contact can be used. When
the contact is open, the controller will operate using
the heating function, and when closed using the cooling
function.
To ensure satisfactory functioning using sensor, the system
must have continuous primary circuit circulation. When
the change-over function is not used, the input must be
left disconnected.
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 locally using the INCREASE
and DECREASE buttons.
Pressing INCREASE will increase the current setpoint by
0.5°C per press until the maximum offset (FS = +3°C)
has been reached. Pressing DECREASE will decrease the
current setpoint by 0.5°C per press until the maximum
offset (FS = -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-DFO has an input for a condensation detector 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.
Actuator exercise
All actuators are exercised, regardless of type or model.
The controller performs this exercise at an interval of 23
hours. 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.
Fan control
RC-DFO has a fan button. Pressing this button will cause
a symbol to show up in the display for 10 seconds. When
the fan symbol is lit, the fan speed can be changed using
the INCREASE/DECREASE buttons.
The controllers have the following positions:
Auto Automatic control of the fan speed to maintain
desired room temperature.
0 Fan off.
I Manual position with low speed.
II Manual position with medium speed.
III Manual position with high speed.
In operating modes Off and Unoccupied, the fan is stopped
regardless of the display setting.
Relay module, RB3
RB3 is a relay module with three relays for controlling
fans in fan-coil applications. The valves are intended to be
used together with the Regio RC-...F controllers. For more
information, see the instruction for RB3.
Application example
Condensation detector
Window
contact
Temperature sensor
Occupancy
detector
Heater
Relay module, RB3
Fan-coil

4
RC-DFO
Technical data
Supply voltage 18...30 V AC, 50...60 Hz
Power consumption 2.5 VA
Ambient temperature 0...50°C
Storage temperature -20...+70°C
Ambient humidity Max 90% RH
Protection class IP20
Display Backlit LCD
Built-in temperature sensor NTC type, range 0...50°C, accuracy ±0.5°C at 15...30°C
Material, casing Polycarbonate, PC
Weight 110 g
Colour Cover: Polar white RAL9010
Bottom plate: Light gray
EMC emissions & immunity standards: This product conforms to the
requirements of the EMC Directive 2014/30/EU through product standards
EN 61000-6-1 and EN 61000-6-3.
RoHS: This product conforms to the Directive 2011/65/EU of the
European Parliament and of the Council through EN 50581:2012.
Inputs
External room sensor PT1000 sensor, 0…50°C. Suitable sensors are Regin’s TG-R5/PT1000,
TG-UH/PT1000 and TG-A1/PT1000.
Change-over alt. potential free contact PT1000 sensor, 0…100°C. Suitable sensor is Regin’s TG-A1/PT1000.
Presence detector Closing, potential-free contact. Suitable occupancy detector is
Regin’s IR24-P.
Condensation detector alt. window contact Regin’s condensation detector KG-A/1 resp. potential-free contact
Outputs
Fan control 3 outputs for speeds I, II and III respectively, 24 V AC, max 0.5 A
Forced ventilation 24 V AC actuator, max. 0.5 A
Valve actuator alt. thermal actuator 2 outputs
Valve actuators 0…10 V DC, max 5 mA
Thermal actuator 24 V AC, max 2.0 A
Output Heating or cooling
Actuator exercise FS = 23 hours interval
Terminal blocks Lift type for max cable cross-section 2.1 mm2
Setpoint settings via display
Basic heating setpoint 5...40°C
Basic cooling setpoint 5...50°C
Setpoint displacement ±0...10°C (FI = ±3°C)

RC-DFO
Head Office Sweden
Phone: [phone]
Web: www.regincontrols.com
Mail: [email protected]
Wiring
Terminal Designation Function
10 G Supply voltage 24 V AC
11 G0 Supply voltage 0 V
12 DO1 Output for fan control I
13 DO2 Output for fan control II
14 DO3 Output for fan control III
20 GDO 24 V AC out common for DO
21 G0 0 V common for UO (when using 0...10 V actuators)
22 DO4 Output for forced ventilation
23 UO1 Output for 0...10 V valve actuator alt. thermal actuator. Heating or cooling
24 UO2 Output for 0...10 V valve actuator alt. thermal actuator. Heating or cooling
30 AI1 Input for an external sensor
31 UI1 Input for change-over sensor, alt. potential-free contact
32 DI1 Input for occupancy detector
33 DI2/CI Input for Regin's condensation detector KG-A/1 alt. window contact
40 +C 24 V DC out common for UI and DI
41 AGnd Analogue ground
42-43 No function
Dimensions
Product documentation
Document Type
Instruction Regio RC-DFO Instruction for RC-DFO
Product sheet TG-R4/PT1000, TG-R5/PT... Information about room sensors, outdoor sensors and
strap-on sensors suitable for RC-DFO
Product sheet TG-UH/PT...
Product sheet TG-A1/PT...
Product sheet IR24-P Information about occupancy detectors suitable for
RC-DFO
Instruction IR24-P Instruction for IR24-P
Instruction RB3 Information on suitable relay module for RC-DFO
Product sheet KG-A/1 Information about condensation sensors for the Regio
controllers
The product documentation is available for download from Regin's website, www.regincontrols.com.
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