Regin RC-TO Anleitung 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 or
cooling increase via change-over. 24 V AC output,
max 0.5 A. Actuator terminal for opening signal
is connected to terminal 13. Common pole on
actuator is connected to terminal 20, GDO.
14 DO3 For three-point actuator, heating decrease or coo-
ling decrease via change-over. 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.
See table 3, SW7.
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 41, AGnd.
32 DI1 Occupancy detector. Potential-free contact. Clo-
sed contact corresponds to occupancy.
See also section Occupancy detector below.
33 DI2/CI Regin's condensation detector, KG-A/1 (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.
See table 3, SW4.
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 and digital function)
42-43 No function
DIP-switches
There are 7 DIP-switches (SW1-7) on the rear of the electronics cassette,
for setting basic functions. Follow tables 2 and 3 below for setting SW1-7.
(FS) in the text indicates factory setting.
Table 2. Basic setpoint, heating. (The cooling setpoint is 2°C higher.)
Basic setpoint (°C) SW1 SW2
20 OFF OFF
22 (FS) OFF ON
24 ON OFF
26 ON ON
Table 3. Other DIP-switches
ON OFF
SW3 Stand-by Occupied (FS)
SW4
DI, window CI, Regin's
contact. Closed condensation
contact indicates detector, KG-A/1
closed window. (FS)
SW5 DO5 activated Not permitted
(FS)
SW6
SW7 External sensor, Internal sensor,
Pt1000 NTC (FS)
RC-TO
Settings
Control state
RC-TO has control state: Heating and cooling in sequence. The
change-over function can be activated, see below.
Change-over function
RC-TO has an input for change-over that automatically resets the
output DO2/DO3 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, the output function is set to
heating and when the temperature drops below 18°C, 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 four different operating modes. Switching between these
modes is performed locally.
Stand-by: Both heating and cooling are disconnected within a tempe-
rature interval around the applicable setpoint (heating setpoint value
- 3°C, cooling setpoint + 3°C).
Occupied: The room temperature is controlled according to the appli-
cable cooling setpoint (24°C) or heating setpoint (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
10 minutes of non-occupancy (no signal from presence detector).
Unoccupied: Both heating and cooling are disconnected within a
Comment
temperature interval with min/max limits (min 15°C, max 30°C). This
mode is activated when the Occupancy button is held depressed for
Preset operating
more than 5 seconds.
mode
Function terminal
Preset operating mode
33, DI2/CI
Occupied is the preset operating mode. It can be set to Stand-by with
DIP-switch SW3. See table 3 above.
Shall be ON
Occupancy detector
An occupancy detector is connected for local control of the operating
mode between Preset operating mode and Bypass.
Not used
Temperature
sensor
2