Siemens | RDU340 | RDU340 Semi-flush-mount room thermostat Data sheet

3
Semi flush-mount
room thermostat
078
RDU340
 for CAV / VAV heating and cooling systems
 for AHU systems
 for universal heating and cooling systems
CE1N3078en
24 Jun 2011

Modulating PI control

Control depending on the room or the return air temperature

Output for a DC 0…10 V actuator and AC 230 V electric heater (ON/OFF)

Automatic or manual heating/cooling changeover

Operating modes: Comfort, Economy and Protection

Two multifunctional inputs for keycard contact, external sensor, etc.

Adjustable commissioning and control parameters

Minimum and maximum setpoint limitation

Adjustable minimum and maximum limitation for air flow signal DC 0...10 V

Output signal inversion as an option (DC 0...10 V  DC 10...0 V)

Mounting on recessed rectangular conduit box, 60.3 mm fixing centers

AC 24 V operating voltage
Building Technologies
Use
Control of the room temperature in individual rooms of ventilation or air conditioning
plants that are:
 Heated or cooled by single duct.
 Heated or cooled by single duct with electric heater.
The RDU340 is suitable for use with VAV systems in connection with the VAV compact
controllers types G…B181.1E/3.
The RDU340 can also be used as an AHU temperature controller in connection with
valve actuators, as well as for universal heating and cooling applications with
DC 0...10 V actuators.
The RDU340 controls
 One DC 0…10 V actuator
 One DC 0…10 V actuator and AC 230V 1-stage electric heater
Use in systems with:




Heating or cooling mode
Automatic heating/cooling changeover
Manual heating/cooling changeover
Heating and cooling single duct (single duct with electric heater)
Functions
 Maintain room temperature via built-in temperature sensor or external room
temperature / return air temperature sensor
 Automatic or manual changeover between heating and cooling mode
 Select applications via DIP switches
 Select operating mode via the operating mode button on the thermostat
 Display current room temperature or setpoint in °C and/or °F.
 Minimum and maximum setpoint limitation.
 Button lock (automatic and manual).
 Two multifunctional inputs, freely selectable for:
– Operating mode switchover contact (key card).
– Automatic heating/cooling changeover sensor.
– External room temperature or return air temperature sensor
– Dewpoint sensor.
– Electric heater enable.
– Alarm input.
 Minimum and maximum limitation of air flow signal DC 0...10 V
 Reload factory settings for commissioning and control parameters.
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Siemens
Building Technologies
RDU340 – Room thermostat
CE1N3078en
24 Jun 2011
Applications
ON
1
2
Prior to snapping the front panel to the base, use the DIP switches on the inner side of
the front panel to commission the thermostat’s applications and the behavior of the
output signal.
DIP switch number
Application
 Single duct
 Heating or cooling
 Single duct, with electric heater
 Heating and cooling , with electric heater
DC 0…10 V output signal normal
1
2
OFF
(factory setting)
ON
n.a.
n.a.
OFF
(factory setting)
ON
DC 0…10 V output signal inverted
n.a.
n.a.
Note: During startup, the thermostat reloads the control parameter factory settings after
each DIP switch settings change.
RDU340
Operating voltage
AC 24 V
3-pos
on/off
DC 0...10 V
--


Infrared
receiver
Product no.
Backlit
LCD
Control output
Housing
color
Type summary
white
3/10
Siemens
Building Technologies
RDU340 – Room thermostat
CE1N3078en
24 Jun 2011
Equipment combinations
Designation
DC 0...10 V actuator
Product no.
Data Sheet
Cable temperature sensor
QAH11.1
1840
Room temperature sensor
QAA32
1747
SSA61...
4893
SSP61…
4864
SSB61...
4891
SQS65…
4573
STS61
4880
GQD161…
4605
Electrical actuator, DC 0...10 V
(for radiator valve)
Electrical actuator, DC 0...10 V
(for small valve 2,5 mm)
Electrical actuator, DC 0...10 V
(for small valves 5.5 mm)
Electromotoric actuator, DC 0...10 V
(for valves 5.5 mm)
Thermal actuator, DC 0...10 V
(for small valves and radiator valves)
GDB161…
4634
GLB161…
GMA161…
4614
GEB161…
4621
GCA161…
4613
DC 0…10 V damper / valve actuator
GBB161…
4626
GIB161…
VAV compact controller
GDB181.1E/3
3544
Accessories
Designation
Changeover mounting kit (50 pcs/package)
Plastic mounting bracket for semi-flush-mount
thermostats for increasing the headroom in the
conduit box by 10mm
Conduit box for semi-flush mounted thermostat
Product no.
ARG86.3
Data Sheet
N3009
ARG70.3
N3009
ARG71 /
S55770-T137
N3009
Ordering
When ordering, indicate both product number and designation:
E.g. RDU340 room thermostat
Order valve actuators separately.
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Siemens
Building Technologies
RDU340 – Room thermostat
CE1N3078en
24 Jun 2011
Mechanical design
The thermostat consists of 2 parts:
 Front panel accommodating the electronics, operating elements and built-in room
temperature sensor.
 Mounting base with the power electronics.
The rear of the mounting base contains the screw terminals. The base fits on a
rectangular conduit box with 60.3 mm fixing centers. Slide the front panel in the
mounting base and snap on.
Operation and settings
1
1.
Operating mode selector / Protection
2.
Adjust setpoint and control parameters
2
Display
2.
6
3
1
Display room temperature, setpoints and
control parameters.
Symbol used to display the current
room temperature
2
4
3.
Heating/cooling mode
Cooling mode
Heating mode,
Electric heater active
7
5
4.
Additional user information
5.
Button lock active
6.
1.
Operating mode
Protection
Comfort
Condensation in room
(dewpoint sensor active)
7.
Indicate fault or reminder
Economy
5/10
Siemens
Building Technologies
RDU340 – Room thermostat
CE1N3078en
24 Jun 2011
Mounting and installation
Mount the room thermostat on a recessed rectangular conduit box with 60.3mm fixing
centers. Do not mount on a wall in niches or bookshelves, behind curtains, above or
near heat sources, or exposed to direct solar radiation. Mount about 1.5 m above the
floor.
Mounting
 Devices must be mounted on clean, dry indoor place without direct airflow from a
heating / cooling device, and not be exposed to dripping or splashing
 In case of limited space in the conduit box use the mounting bracket ARG70.3 to
increase the headroom by 10mm
Wiring
See the mounting instructions M3078 enclosed with the thermostat.







Commissioning
Comply with local regulations to wire, fuse and earth the thermostat.
Properly size the cables to electric heater for AC 230 V mains voltage.
Isolate the cables of SELV inputs X1-M/X2-M if the conduit box carries AC 230 V
mains voltage.
Inputs X1-M or X2-M of different units (e.g. summer/winter switch) may be
connected in parallel with an external switch. Consider overall maximum contact
sensing current for switch rating.
No metal conduits
No cables provided with a metal sheath
Disconnect from supply before opening the cover
Set the thermostat application via the DIP switches before snapping the front panel on
the mounting base.
After power is applied, the thermostat carries out a reset during which all LCD
segments flash indicating that the reset was correct. After the reset, which takes about
3 seconds, 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 (see basic documentation P3078).
Note
After powerfail the thermostat restarts in the same mode as before.
Control sequence

The control sequence may need to be set via parameter P01 depending on the
application. The factory setting for the single duct application is “Cooling only”.
Calibrate sensor

Recalibrate the temperature sensor if the room temperature displayed on the
thermostat does not match the room temperature measured (after min. 1 hour of
operation). To do this, change parameter P05.
Setpoint and range
limitation

We recommend to review the setpoints and setpoint ranges (parameters P08…P12)
and change them as needed to achieve maximum comfort and save energy.
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Siemens
Building Technologies
RDU340 – Room thermostat
CE1N3078en
24 Jun 2011
Disposal
The device is classified as waste electronic equipment in terms of the European Directive 2002/96/EC (WEEE) and should not be disposed of as unsorted municipal waste.
The relevant national legal rules are to be adhered to. Regarding disposal, use the
systems setup for collecting electronic waste.
Observe all local and applicable laws.
Technical data
Power supply
Outputs
Inputs
Operating voltage
Rated voltage
Frequency
Power consumption
Control output Y10-G0
Resolution
Current
Control output Y21-L (N.O.)
Rating
Multifunctional input X1-M/X2-M
Temperature sensor input:
Type
Digital input:
Operating action
Contact sensing
Insulation against mains voltage (SELV)
Function input:
External temperature sensor, heating/cooling changeover
sensor, operating mode switchover contact, dewpoint
monitor contact, enable electric heater contact, alarm
contact
Operational data
Switching differential, adjustable
Heating mode
Cooling mode
Setpoint setting and range
Comfort
Economy
Protection
Multifunctional input X1/X2
Input X1
Input X2
(P30)
(P31)
(P08)
(P11-P12)
(P65-P66)
Selectable 0…6
Factory setting = 3 (P38)
Factory setting = 2 (P40)
Built-in room temperature sensor
Measuring range
Accuracy at 25 °C
Temperature calibration range
Settings and display resolution
Setpoints
Current temperature value displayed
SELV AC 24 V  20%
AC 24 V
50/60 Hz
Max. 8 VA
SELV DC 0…10 V
39 mV
Max.  1 mA
AC 230 V
Max. 5(2) A
QAH11.1 (NTC)
Selectable (N.O./N.C.)
SELV DC 0...5 V/max 5 mA
4 kV, reinforced insulation
Selectable
X1: P38
X2: P40
2 K (0.5...6K)
1 K (0.5...6K)
21°C
(5...40 °C)
15°C/30°C (OFF, 5...40 °C)
8°C/OFF (OFF, 5...40 °C)
Operating mode switchover
Heat/cool changeover sensor
0…49 °C
< ± 0.5 K
± 3.0 K
0.5 °C
0.5 °C
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Siemens
Building Technologies
RDU340 – Room thermostat
CE1N3078en
24 Jun 2011
Environmental
conditions
Standards and
directives
Operation
Climatic conditions
Temperature
Humidity
Transport
Climatic conditions
Temperature
Humidity
Mechanical conditions
Storage
Climatic conditions
Temperature
Humidity
conformity
EMC directive
Low-voltage directive
2004/108/EC
2006/95/EC
C-tick conformity to EMC emission standard
AS/NSZ 4251.1:1999
Reduction of hazardous substances
Product standards
Automatic electrical controls for household and
similar use
Special requirements for temperature-dependent
controls
Electronic control type
General
As per IEC 721-3-3
Class 3K5
0 ...+ 50 °C
< 95 % r.h.
As per IEC 721-3-2
Class 2K3
 25...+60 °C
< 95 % r.h.
Class 2M2
As per IEC 721-3-1
Class 1K3
 25...+60 °C
< 95 % r.h.
Electromagnetic compatibility
Emissions (residential)
Immunity (industrial and residential)
Protective class
Pollution class
Degree of protection of housing
Connection terminals
Housing front color
Weight
2002/95/EC
EN 60730–1
EN 60730–2-9
2.B (microdisconnection on
operation)
IEC/EN 61000-6-3
IEC/EN 61000-6-2
II as per EN 60730
Normal
IP 30 to EN 60529
Solid wires or prepared
stranded wires
1 x 0.4…2.5 mm2
or 2 x 0.4…1.5 mm2
RAL 9003 white
0.220 kg
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Siemens
Building Technologies
RDU340 – Room thermostat
CE1N3078en
24 Jun 2011
Connection terminals
G
X1
M
X2
L Y21
G0
G, G0
L
SELV
Y21
Y10
X1, X2
Y10 G0
M
Operating voltage thermostat AC 24 V
Operating voltage for electric heater
AC 230 V
Control output for electric heater
Control output for DC 0…10 V actuator
Multifunctional input for temperature sensor
(e.g. QAH11.1) or switch
Measuring neutral for sensor and switch
Connection diagrams
Application:
G
Single duct in VAV/CAV
B2
S1
Heating or cooling for
universal or AHU
N1
Y1
QAH11.1 +
ARG86.3
F 10 A
AC 24V
S1
X1
G
X2
M
B2
L Y21
G0
Y10
Room thermostat RDU340
VAV / CAV system,
DC 0...10V actuator for heating or cooling
Operating mode switch-over contact
(e.g. key card)
Heat/cool changeover sensor
N1
G0
3078A02
Y1
G0
G - G0 AC 24 V
G
Single duct with electric
heater in VAV/CAV
S1
AC 24V
Heating and cooling with
electric heater
for universal or AHU
N1
Y1
QAH11.1 +
/ QAA32
F 10 A
G
G0
X1
M
E1
S1
X2
L Y21
Y10
G0
B2
N1
Room thermostat RDU340
VAV / CAV system,
DC 0...10V actuator for heating or cooling
Electric heater
Operating mode switch-over contact
(e.g. key card)
Heat/cool changeover sensor
L
F 10 A
N
Y1
E1
G0
3078A03
Application:
G - G0 AC 24 V
L - N AC 230 V
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Siemens
Building Technologies
RDU340 – Room thermostat
CE1N3078en
24 Jun 2011
Dimensions
Dimensions in mm
10/10
 2008 - 2011 Siemens Switzerland Ltd.
Siemens
Building Technologies
RDU340 – Room thermostat
Subject to change
CE1N3078en
24 Jun 2011
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