Siemens RDF210, RDF210.2, RDF210.2/IR, RDF210/IR User Manual
058
3
RDF210, RDF210.2, RDF210/IR, RDF210.2/IR
Room Temperature
Controllers with LCD
with 7-day time program
for 2-pipe fan coil units
for use with compressors in DX type equipment
RDF210…
N3058en
10.01.2006
Output for on / off valve actuator or 1-stage compressor
Operating modes: Normal operation, Auto Timer (energy saving) and Standby
3-speed fan control: Automatic or manual
8 programmable timers
Adjustable commissioning and control parameters
Optional display of room temperature or setpoint
Minimum and maximum setpoint limitation
Operating voltage AC 230 V
Additional features of RDF210
Automatic heating / cooling changeover
Input for heating / cooling changeover or return air temperature sensor
Additional features of RDF210.2
Manual heating / cooling changeover
Optional
Infrared remote control (RDF210/IR, RDF210.2/IR)
Building Technologies
HVAC Products
Use
Functions
For controlling the room temperature in individual rooms and zones that are
• heated or cooled with 2-pipe fan coil units
• cooled with a single compressor in DX type equipment
The controller controls
• a 3-speed fan
• either a valve actuator in a 2-pipe system, or
• a 1-stage compressor in DX type equipment
Suitable for use in systems with
• automatic heating / cooling changeover (RDF210)
• continuous heating or cooling mode (RDF210)
• manual heating / cooling changeover (RDF2110.2)
• Changeover between heating and cooling mode is either automatic by a QAH11.1
changeover cable temperature sensor or manually
• Maintenance of room temperature either with integrated temperature sensor or external room / return air temperature sensor (only with RDF210)
• Selection of operating mode with the operating mode button
AUTO
or on the
controller
• 8 programmable timers for changing over between Normal operation and Energy
Saving mode
• 3-speed fan control (automatic or manual)
• Output for 2-position (on / off) valve actuator or 1-stage compressor
• Optional with infrared remote control (only with RDF210…/IR)
Controller
Temperature control
Display
The controller acquires the room temperature via its built-in sensor and maintains the
setpoint by delivering 2-position valve control commands or compressor output commands. With the RDF210, an external room temperature sensor (QAA32) or external
return air temperature sensor (QAH11.1) can be used instead.
The switching differential is 2 K in heating mode and 1 K in cooling mode (adjustable
via parameters P08 and P09).
The display shows the acquired room / return air 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
and cooling symbols on the display show the status of the fan coil.
This means that the symbols are also shown while the controller 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.
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Operating modes
Y
Y
The following operating modes are available:
Normal operation
Tip!
Auto Timer mode
Energy Saving mode
Standby
Avoiding damage
due to moisture
In Normal operation, the controller maintains the setpoint, which can be adjusted via
the
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, thus saving costs.
In Auto Timer mode
AUTO
, the controller will automatically change over between Normal
operation and Energy Saving mode according to the 8 preprogrammed timers. The
AUTO
display shows the Auto Timer mode symbol
currently maintained, either Normal operation
and the symbol of the operating mode
or Energy Saving mode
.
The setpoints of Energy Saving mode can be adjusted via control parameters
P01 and P02.
The default fan speed in Auto Timer mode is automatic fan.
When the controller is in Standby 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, which means that the controller is not activated when in Standby mode.
To avoid damage due to moisture in very warm and humid climatic zones resulting from
lack of air circulation in Energy Saving mode, the fan can be kept running all the time
(e.g. in apartments or shops during unoccupied periods), when setting parameter P20
“ON in dead zone”. In this case, the fan keeps running at minimum fan speed 1.
Control sequences
Water-based fan coil
application
Compressor based
application
ON
OFF
Used in conjunction with a valve, either for heating / cooling with changeover, heating
only or cooling only.
Used in conjunction with a 1-stage compressor for cooling only or heating only.
Heating mode Cooling mode
11
3058D01
1
0
½ SDH
T[°C] Room temperature SDH Switching differential “Heating”
W Room temperature setpoint SDC Switching differential “Cooling”
Y11 Control output “Valve” or “Compressor”
w
T[°C]
½ SDH
11
1
0
½ SDC
3058D02
w
T[°C]
½ SDC
The valve or compressor receives the OPEN command via control output Y11 when
1. the acquired room temperature lies by half the switching differential below the set-
point (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, adjustable via parameter P16)
The valve or compressor receives the CLOSE command via control output Y11 when
1. the acquired room temperature lies by half the switching differential above the set-
point (heating mode) or below the setpoint (cooling mode), and
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2. control output Y11 was energized for more than the “Minimum output on time”;
(factory setting 1 minute, adjustable by parameter P15)
Note: 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.
Heating / cooling
mode
Minimum output
on time / off time Y11
Fan operation
With the RDF210, the changeover between cooling and heating takes place either
automatically via a heating / cooling changeover sensor or a remote changeover
switch. If the controller was set to ”Cooling only” or ”Heating only”, changeover will not
be possible (parameter P22, factory setting ”Cooling only”).
With the RDF210.2, when pressing the heating / cooling changeover button
, the
controller will change from heating to cooling, or vice versa.
The minimum output on time and off time of Y11 can be adjusted from 1…10 minutes
via parameters P15 and P16. Factory setting is 1 minute. In this case, any readjustment
of the setpoint or of heating / cooling mode changeover will be used immediately for
computing the output status and output Y11 may not hold the minimum on / off time of
1 minute.
If parameter P15 or P16 is set to a level above 1 minute, the minimum on / off time of
Y11 will be maintained as set, even if the setpoint or changeover mode has been readjusted.
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 will
close and the fan switch off: Temperature-dependent fan control (see diagram below).
The individual switching differentials of the fan speeds can be adjusted via control parameters P08 – P13.
Heating mode Cooling mode
Valve
Valve
Y11Y11
3058D03
Q3
Q2
Q1
Fan
SDH
SDHSDH2SDH3
W
Temp
Q3
Q2
Q1
Temp
Fan
W
SDC
Temp
Temp
SDC3SDC2SDC
Ventilation
always on
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 Normal operation using parameter P21 and for Energy Saving
mode using parameter P20 (also refer to “Avoiding damage due to moisture”).
Dwelling time
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 using parameter P14.
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Fan start
Fan in Auto Timer
mode
Auto Timer
Whenever the fan starts from standstill, it starts with speed 3 for 1 second in order to
guarantee a safe fan motor start (to overcome inertia and friction)
In Auto Timer mode, the default fan mode is automatic. The fan mode can be changed
to manual fan speed. With each changeover from Normal operation to Energy Saving
mode, or vice versa, the fan will return to default mode automatic.
The controller provides an Auto Timer mode with 8 programmable timers. In this mode,
the controller will automatically change over between Normal operation and Energy
Saving mode according to the preprogrammed timers.
Setting the timers
Auto Timer during Normal operation Auto Timer during Energy Saving mode
1
AUTO
o
C
1
AUTO
o
C
Each timer has a Normal operation start time and a Normal operation end time which
can be applied to several weekdays.
To adjust the time schedule, keep the
button depressed for 3 seconds to go to
the programmable timer setting mode.
This mode is indicated by displaying Ax (x= auto timer 1...8) and the time xx:xx flashing.
For each auto timer, proceed as follows:
1. The
and symbols are displayed. Press or to adjust the Normal opera-
tion start time and confirm by pressing
.
2. The
and symbols are displayed. Press or to adjust the Normal operation
end time or Energy Saving start time respectively and confirm by pressing
.
3. Symbol
the next day. Confirm setting for actual timer by pressing
1
will flash. Press or to select or deselect each day and advance to
and advance to t
he
next timer.
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