Siemens RDF310.2/MM User manual

CB1N3066en
2019-10-25 Smart
Infrastructue
3
066
RDF310.2/MM
Flush-mounted Room
Thermostat
RDF310.2/MM
for 2-pipe fan coil units
·Output for on/off valve or 3-wire on/off valve actuator
·3-speed fan control: Automatic or manual
·Manual heating/cooling changeover or continuous Cooling only / Heating only
·Operating modes: Comfort, Protection
·Adjustable commissioning and control parameters
·Optional display of room temperature or setpoint
·Minimum and maximum setpoint limitation
·Display temperature in increments of 0.5 °C
·Operating voltage AC 230 V
·Mounting on recessed square conduit box, fixing centres 60.3 mm
·User and parameter settings can be retained or restored with power loss

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Use
For controlling the room temperature in individual rooms and zones that are…
·heated or cooled with 2-pipe fan coil units
The thermostat controls…
·a 3-speed fan
·an on/off valve actuator in a 2-pipe system
Suitable for use in systems with…
·continuous heating or cooling mode
·manual heating/cooling changeover
Functions
·Manual changeover between heating and cooling mode
·Maintenance of room temperature with integrated internal temperature sensor
·Selection of operating mode with the operating mode button on the thermostat
·3-speed fan control (automatic or manual)
·Output for 2-position (on/off) valve or 3-wire (on/off) valve actuator
Applications
Application and output signal, diagram
·2-pipe fan coil unit ON/OFF (heating or cooling)
3076D20
M1
V1
N1T
V1
Heating/
cooling valve actuator
M1
3
-
speed fan
N1
Thermostat

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Operation
The thermostat acquires the room temperature via its built-in sensor and maintains the
setpoint by delivering 2-position valve control commands.
The switching differential is 1 K in heating mode and 1 K in cooling mode (adjustable
via parameters P08 and P09).
The display shows the acquired room temperature or the setpoint of the current
operating mode. This can be selected via parameter P18. Factory setting is display of
the current room temperature.
The heating symbol or the cooling symbol displays to indicate the output status of
the relays connected to the fan coil. This means that the symbol does not display when
the thermostat operates in the neutral zone. If the thermostat is under manual heating
or cooling changeover, the heating symbol or the cooling symbol displays
permanently to indicate the control sequence. i.e. heating or cooling. This means that
the symbol displays when the thermostat operates in the neutral zone.
If required, room temperature and setpoint can also be displayed in °F in place of °C by
changing parameter P17.
Operating modes
The following operating modes are available:
In Comfort mode, the thermostat maintains the setpoint, which can be adjusted via the
+and - buttons. The fan can be set to automatic or manual fan speed: Low, medium or
high.
The setpoint setting range can be limited to a minimum (P05) and maximum (P06). This
helps prevent the waste of energy, and saving costs.
When the thermostat is in Protection mode , the relevant setpoints of heating or
cooling are maintained. These setpoints can be adjusted via control parameters P03
and P04. Factory setting of both setpoints is OFF, indicating the thermostat is not
activated when in Protection mode.
To avoid damage due to moisture in very warm and humid climatic zones resulting from
lack of air circulation in Comfort mode, the fan can be kept running all the time (e.g. in
apartments or shops during unoccupied periods), when setting parameter P21 “ON in
dead zone”. In this case, the fan keeps running at minimum fan speed 1 in the neutral
zone.
Temperature control
Display
Comfort Mode
Tip!
Protection Mode
Avoiding damage
due to moisture

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Control sequences
Used in conjunction with a valve, either for heating/cooling with changeover, or heating
only, cooling only.
Heating mode Cooling mode
w
Y11
w
Y11
T[°C] Room temperature SDH Switching differential “Heating”
W Room temperature setpoint SDC Switching differential “Cooling”
Y11 Control output “Valve”
The valve receives the OPEN command via control output Y11 when
1. the acquired room temperature lies by half the switching differential below the
setpoint (heating mode) or above the setpoint (cooling mode), and
2. control output Y11 was not energized for more than the “Minimum output off time”
(factory setting 1 minute)
The valve receives the CLOSE command via control output Y11 when
1. the acquired room temperature lies by half the switching differential above the
setpoint (heating mode) or below the setpoint (cooling mode), and
2. control output Y11 was energized for more than the “Minimum output on time”;
(factory setting 1 minute)
Control output Y12 delivers a control command which is inverted to the control
command at output Y11 and which can be used for normally open valves.
When you press the heating/cooling changeover button , the thermostat changes
from heating to cooling, or vice versa.
If the thermostat is set to ”Cooling only” or ”Heating only” via P22,the manual
changeover function on the button is not available (the factory setting of parameter P22
is ”manual changeover”). Instead, “NOP” flashes on the display, indicating continuous
cooling or heating is set respectively.
The minimum output on/off time of Y11 and Y12 is fixed at 1 minute. It means that any
readjustment of the setpoint or of Heating/Cooling Mode changeover lasts for
1 minute before Y11 and Y12 react.
Water-based fan coil
application
ON
OFF
Note
:
Heating/cooling
mode
Minimum output
on/off time Y11 and
Y12

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Fan operation
The fan operates either in automatic mode or at the selected speed when using manual
mode. In automatic mode, the fan speed depends on the setpoint and the current room
temperature. When the room temperature reaches the setpoint, the control valve is
closed and the fan either remains in fan speed 1 or switches off (parameter P21,
factory setting: fan speed 1 in dead zone).
In “Temperature-dependent” fan control the fan switches off (please see diagram
below). The individual switching differentials of the fan speed 1 (Q1 only) can be
adjusted via control parameters P08 – P09. The individual switching differentials of the
fan speed 2 and 3 (Q2 and Q3) are fixed at 1K.
Heating mode Cooling mode
W
SDH
SDHSDH2SDH3
Valve
Fan
W
SDC
SDC3SDC2SDC
Valve
Fan
Y11Y11
Temp
Temp
Temp
Temp
Q3
Q2
Q1
Q3
Q2
Q1
3058D03
If desired, fan control can be set to ”Temperature-independent”, which means that
ventilation is always on, even within the dead zone, using at least fan speed 1. This can
be selected individually for Comfort mode via parameter P21; also refer to “Avoiding
damage due to moisture” on page 3).
In automatic mode, a dwelling time of 2 minutes (factory setting) is active. The fan
maintains that speed for at least 2 minutes before it switches to the next speed. This
dwelling time can be adjusted from 1…5 minutes via parameter P14.
Whenever the fan starts from standstill, it starts with speed 3 for 1 second in order to
guarantee a safe fan motor starts (to overcome inertia and friction).
Error handling
When the room temperature is out of the measuring range, which means above 49 °C
or below 0 °C, the display shows the limiting temperature in flashing figures, e.g. “0 °C”
or “49 °C”.
If the current setpoint is not OFF (see parameter P03) and the thermostat is in heating
mode, when the temperature is below 0 °C, output Y11 is energized. In all other cases,
output Y11 is de-energized until the temperature returns to the measuring range, and
then the thermostat resumes Comfort mode.
Ventilation
always on
Dwelling time
Fan start
Temperature out of
range

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Control parameters
To optimize the control performance, you can use local HMI to adjust a number of
control parameters. Proceed as follows to change the control parameter.
1. Set the thermostat to Protection mode .
2. Press and hold the +and–buttons simultaneously for 3 seconds. Release them
and, within 2 seconds, press and hold the +button again for 3 seconds. Then,
P03 displays.
3. Select the required parameter by pressing the +and –buttons:
4. Press the +and –buttons simultaneously. Te current value of the selected
parameter displays on the screen. Press the +or –button to change the value.
5. You can either press the +and –buttons simultaneously to confirm the change
or wait for 5 seconds to have the change saved automatically.
6. Repeat steps 3 through 5 to change more parameters.
7. 10 seconds after the last display or setting, all changes are saved and the
thermostat returns to Protection mode.
Reload the factory setting of the control parameters as follows:
1. Set the thermostat to Protection mode .
2. Press the +and–buttons simultaneously for 3 seconds. Release them and,
within 2 seconds, press the button twice.
Then 888 displays during the reloading process.
Para-
meter
Meaning Setting range Factory
setting
P03
Setpoint of heating in
Protection Mode
(Wheat
Stb
)
OFF, 5 °C…WcoolStb 8 °C
P04
Setpoint of cooling in
Protection Mode
(Wcool
Stb
)
OFF, WheatStb …40 °C OFF
P05
Minimum setpoint limitation in
Comfort Mode
(Wmin
Norm
)
5
°C
…Wmax
Norm
5
°C
P06
Maximum setpoint limitation in
Comfort Mode
(Wmax
Norm
f
)
Wmin
Norm
…40
°C
35
°C
P07
Sensor calibration
-
3…
3 K
0 K
P08
Switching differential heating mode SDH
0.5…
4
K
1
K
P09
Switching differential cooling mode SDC
0.5…
4
K
1 K
P14
Dwelling time of auto fan speeds
1…5 min
2 min
P17
Selection of °C or °F
°C or °F
°C
P18 Display of temperature or setpoint OFF: Setpoint
ON: Room (or return air) temperature ON
P21 Fan control in Comfort mode OFF in dead zone
ON in dead zone
ON
P22 Heating/cooling mode 0: Heating only 1: Cooling only
3: Manual H/C changeover 3: Manual
Parameter settings
Parameter reset
Control parameters

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Equipment combinations
Type of unit
Product no.
Data sheet
Electromotoric ON/OFF actuator SFA21... 4863
Electromotoric ON/OFF valve and
actuator (only available in AP, UAE,
SA and IN)
MVI…/MXI… A6V11251892
Zone valve actuators (only available in
AP, UAE, SA and IN)
SUA… 4832
Thermal actuator (for radiator valve) STA23... 4884
Thermal actuator
(for small valves 2.5 mm)
STP23... 4884
Ordering
When ordering, please indicate the product name, product number and SSN number:
(e.g. room thermostat, RDF310.2/MM, S55770-T187)
Valve actuators should be ordered separately.
ON/OFF actuators

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Mechanical design
The thermostat consists of two parts:
·Front panel which accommodates the electronics, the operating elements and the
built-in room temperature sensor
·Mounting base with the power electronics
The mounting base carries on the rear side the screw terminals. It fits on a square
conduit box with fixing centres 60.3mm. The front panel engages in the mounting base
and snaps on.
1 Display of the room temperature, setpoints and control parameters
2 Symbol used when displaying the current room temperature
3 Protection mode / fan mode status
Protection mode
AUTO Auto fan active
Fan speed low, medium, high
4 output is energized (auto mode) / manual cooling mode (manual mode)
output is energized (auto mode) / manual heating mode (manual mode)
5 Comfort mode
6 Buttons for adjusting the setpoints and control parameters
7 Button for changing fan operation and Protection mode ( )
8 Manual heating/cooling changeover ( )
Setting and operating
elements
Legend
1
2
34
5
6
78

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Mounting and installation
The thermostat can be mounted on a recessed square conduit box with fixing centres
of 60.3 mm. The mounting location on a wall should not be in niches or bookshelves,
not behind curtains, above or near heat sources and wind outlet or inlet, and not
exposed to direct solar radiation. Mounting height is about 1.5 m above the floor.
Please also refer to the Mounting Instructions M3066… enclosed with the thermostat.
·Wiring, protection and earthing must be installed in compliance with local
regulations.
Warning!
No internal line protection for supply lines to external consumers
(Q1, Q2, Q3, Y11, Y12)
Risk of fire and injury due to short-circuits!
·Adapt the line diameters as per local regulations to the rated value of the installed
overcurrent protection device.
·The AC 230 V mains supply line must have an external circuit breaker with a rated
current of no more than 10 A.
·Only valves rated for AC 230 V may be used.
·Disconnect from supply before opening the cover
After applying power, the thermostat makes a reset during which all LCD segments
flash, indicating that the reset has been correctly made. This takes about 3 seconds.
Then, the thermostat is ready for commissioning by qualified HVAC staff.
The control parameters of the thermostat can be set to ensure optimum performance of
the entire system (please also refer to “Parameter settings”).
·Set the heating/cooling mode via parameter P22 depending on the application.
Factory setting is “Manual heat/cool changeover”. Set P22 accordingly in ”Cooling
only” or “Heating only” mode.
·When the room temperature displays on the thermostat does not match the room
temperature effectively measured, you can recalibrate the temperature sensor via
parameter P07.
·For comfort and energy saving reasons, it is suggested to review the setpoints and
setpoint ranges (parameters P03…P06), if necessary, to change them accordingly.
Disposal
The device is considered electrical and electronic equipment for disposal in terms of the
applicable European Directive and may not be disposed of as domestic garbage.
·Dispose of the device through channels provided for this purpose.
·Comply with all local and currently applicable laws and regulations.
Wiring
Commissioning
Heating/
cooling mode
Calibrating the sensor
Setpoint and range
limitation

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Technical data
Operating voltage
AC 230 V
+
10/
-
15
%
Frequency
50/60 Hz
Power consumption
M
ax.
4
VA
No internal fuse!
External preliminary protection with Max C 10 A circuit breaker
required in all cases
.
Fan control Q1, Q2, Q3-N
Rating
AC 230 V
5
mA…
4(2)
A
Control output Y11-N (N.O.) / Y12-N (N.C.)
Rating
AC 230 V
5 mA…
4(2)
A
Switching differential
Heating mode
Cooling mode 0.5...4 K (factory setting: 1 K)
0.5...4 K (factory setting: 1 K)
Setpoint setting range
Comfort mode
Protection mode
5...40 °C
OFF, 5...40 °C
Factory setting of setpoints
Comfort mode
Protection (heating and cooling) mode 20 °C
OFF
Built-in room temperature sensor
Measuring range
Accuracy at 25 °C
Temperature calibration range
0…49 °C
<±0.5 K
±
3.0 K
Resolution of settings and display
Temperature setpoints
Current temperature value displayed
0.5 °C
0
.5
°C
Storage
Climatic conditions
to IEC 60721-3-1
class 1K3
Transport
Climatic conditions
to IEC 60721-3-2
class 2K3
Operation
Climatic conditions
to IEC 60721-3-3
class 3K5
1)
EU Conformity (CE)
CB1T3066xx*)
RCM
conformity
AS/NZS 61000
-
6
-
3:2007
Electronic control type 2.B (micro-disconnection on
operation)
Devices of safety class
II as per EN 60730
-
1
Pollution class
II as per EN 60730
-
1
Degree of protection of housing
IP 30 as per EN 60529
Housing flammability class according to UL94
V
-
0
The product environmental declaration CB1E3066en*)
contains data on environmentally
compatible product design and assessments (RoHS compliance, materials
composition, packaging, environmental benefit, disposal).
Power supply
Caution
Outputs
Operational data
Environmental
conditions
Norms and standards
Environmental
conditions