Regin REGIO RC-DTO Anweisungen Seite 2

Follow table 1 below for setting. (FS) in the text indicates factory set-
ting.
Table 1. I/O connection terminals
Ter- Desig- Operation
minal nation
10 G Supply voltage 24 V AC
11 G0 Supply voltage 0 V
12 DO1 For forced ventilation. 24 V AC output, max 0.5 A.
24 V AC actuator is connected between terminal
12 and terminal 20, GDO.
13 DO2 For three-point actuator, heating increase. 24
V AC output, max 0.5 A. Actuator terminal for
opening signal is connected to terminal 13. Com-
mon pole on actuator is connected to terminal 20,
GDO.
14 DO3 For three-point actuator, heating decrease. 24
V AC output, max 0.5 A. Actuator terminal for
closing signal is connected to terminal 14.
20 GDO 24 V AC out common for DO. Internally connected
to terminal 10, G.
21 G0 0 V common for DO. Internally connected to
terminal 11, G0.
22 DO4 For three-point actuator, cooling increase. 24
V AC output, max 0.5 A. Actuator terminal for
opening signal is connected to terminal 22. Com-
mon pole on actuator is connected to terminal 20,
GDO.
23 DO5 For three-point actuator, cooling decrease. 24
V AC output, max 0.5 A. Actuator terminal for
closing signal connected to terminal 23.
24 No function
30 AI1 For external room sensor, PT1000. Range 0...50°C.
Sensor is connected between terminals 30 and 41,
AGnd.
31 UI1 For switching between heating and cooling on a
two-pipe system (Change-over).
PT1000-sensor is connected between terminals
31 and 41, AGnd. Range: 0...100°C.
alternative
For potential-free contact. A potential-free contact
is connected between terminals 31 and 40, +C.
32 DI1 Occupancy detector. A potential-free contact is
connected between terminals 32 and 40, +C.
Closed contact corresponds to occupancy.
See also section Occupancy detector below.
33 DI2/CI Regin's condensation detector, KG-A (FS). The
sensor is connected between terminals 33 and 41,
AGnd.
alternative
Window contact (DI)
A potential-free contact is connected between
terminals 33 and 40, +C. Closed contact indicates
closed window.
40 +C 24 V DC out common for DI and UI (with digital
function)
41 AGnd Analogue ground, reference for AI and UI (with
analogue function)
42-43 No function
Settings
FS values can be changed in the parameter menu in the display.
Control states
RC-DTO can be configured for different control states /control sequences:
• Heating
• Heating or cooling via the 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
Heating/Cooling with VAV-control and forced supply air function
Heating and Cooling in sequence, where cooling is obtained by varying
the airflow. The cooling output is used for controlling the supply air dam-
per on both heating and cooling demand. When the ventilation is forced,
the cooling output is set to full cooling, regardless of what the controller
output signal is.
Heating/Cooling with VAV-control
Heating and cooling are controlled in the same way as in the VAV-control
above. However, it is not possible to force the damper. The cooling output
has a configurable min. limit to ensure a minimum basic ventilation in the
room. A max. limit can be set for the airflow when heating is active. If the
heater is not positioned in the supply air duct and you do not want the
RC-DTO
damper to open on heating demand, you should set the max. limit to
equal the basic flow.
Change-over function
RC-DTO has an input for change-over that automatically resets the
output UO1 to operate with heating or cooling function. The input can
be connected to sensors of type PT1000 and have the sensor mounted
so that it senses the temperature on the supply pipe to the coil.
When the temperature exceeds 22°C (FS), the output function is set
to heating and when the temperature drops below 18°C (FS), the
output is set to cooling.
As an alternative, a potential-free contact can be used. When the con-
tact is open the controller works with the heating function and when it
is closed, with 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.
Operating mode
There are five different operating modes. Switching between these
modes is performed locally.
Stand-by: Both heating and cooling are disconnected within a tem-
perature interval around the applicable setpoint (FS = heating setpoint
value - 3°C, cooling setpoint + 3°C).
Occupied: The room temperature is controlled according to the ap-
plicable cooling setpoint (FS = 24°C) or heating setpoint (FS = 22°C).
Bypass: Is controlled by the occupancy detector or other digital
contact connected to the controller, closing activates Bypass. Control
of the room temperature in the same way as Occupied mode. Bypass
also controls forced ventilation. Reset to Preset operating mode
occurs after a certain time (FS = 10 minutes) of non-occupancy (no
signal from presence detector).
Unoccupied: Both heating and cooling are disconnected within a
temperature interval with configurable min/max limits (FS = min 15°C,
max 30°C). This mode is activated when the Occupancy button is
held depressed for more than 5 seconds.
Off: Heating and cooling are disconnected. However, the temperature
must not drop below the set minimum temperature (FS=8°C). The
mode is activated on open window (or when the Occupancy button is
held depressed for more than 5 seconds, if this has been configured
in the parameter menu).
Preset operating mode
Occupied is the preset operating mode. This can be set to Stand-by in
the parameter menu, parameter 45.
Occupancy detector
An occupancy detector is connected for local control of the operating
mode between Preset operating mode and Bypass.
2