Siemens RDS120-B User manual

Smart Thermostat
RDS120-B
Commissioning Guide
A6V11727391
06/20/19
Smart Infrastructure

Siemens Industry, Inc.
A6V11727391
Smart Infrastructure
06/20/19
Table of Contents
1 Summary ........................................................................................................ 3
1.1 Brief description ................................................................................................................ 3
1.2 Inbox items.......................................................................................................................... 3
1.3 Associated Equipment .................................................................................................... 3
2 Installation ..................................................................................................... 6
3 Setup wizard ................................................................................................ 10
4 Presence detection ..................................................................................... 11
4.1 Presence detection using the built-in PIR sensor ...............................................11
4.2 Approach detection .......................................................................................................12
5 Changing system setup.............................................................................. 14
6 Managing application settings ................................................................. 17
7 Disassembly ................................................................................................. 27
8 Appendices .................................................................................................. 28
8.1 Technical specifications................................................................................................28
8.2 Cyber security disclaimer .............................................................................................28
8.3 Regulatory information ................................................................................................28
8.3.1 ISED Regulations (Canada) ........................................................................28
8.3.2 FCC Regulations (USA)................................................................................29
8.4 EULA ....................................................................................................................................29

Summary
Brief description
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1Summary
1.1 Brief description
Smart Thermostat RDS120 is designed to control the heating/cooling system in
apartments, single family homes, dormitories and other residential-type as well
as light commercial spaces. Apart from traditional operations performed directly
on the hardware unit, remote operations that use a mobile app are also allowed
for your convenience.
1.2 Inbox items
Items
Quantity
Thermostat (front and rear)
1
Metal mounting plates (small & large)
2
Plastic frame
1
Set of screws and drywall anchors
1
Quick guide
1
Mounting instructions
1
Wiring decals
1
Activation code decal
1
1.3 Associated Equipment
Remote sensors
Sensor Type
Model Number
1k Ohm
at 32°F
Ni R
1k
Ohm Pt
RTD
Type 2
Thermistor
0-10 Vdc
Datasheet*
Room Temperature Sensors
- Wall-
mount
QAA2220.EWSN
x
149-714
QAA2212.EWSN
x
149-714
QAA2230.EWSN
x
149-714
QAA22SS.EWSN
x
149-714
- Flush-
mount1)
540-984
(Metal)
x
149-956
536-994A
(Beige)
x
149-956
536-994B
(White)
x
149-956

Summary
Associated Equipment
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Sensor Type
Model Number
1k Ohm
at 32°F
Ni R
1k
Ohm Pt
RTD
Type 2
Thermistor
0-10 Vdc
Datasheet*
- Duct-
mount
QAM2030.010
(4”)
x
149-915
Outdoor Temperature Sensors
QAC22
x
149-920
QAC2012
x
149-920
QAC2030
x
149-920
QAC3161
x
149-920
Cable Temperature Sensors
QAP22
x
149-918
QAP2012.150
x
149-918
QAP1030.200
x
149-918
Room Humidity Sensors
- Wall-
mount with
temperature
QFA3212.EWSN
x(T)
x (r.h.)
149-714
QFA32SS.EWSN
x (T+r.h.)
149-714
- Duct-
mount with
temperature
QFM2160U
x (T+r.h.)
149-991
Indoor Air Quality Sensors
- CO2
QPA2000
x
149-910
- VOC + CO2
QPA2002
x
149-910
QPA2002D1)
x
149-910
- CO2with
temperature
QPA2060
x(CO2+T)
149-910
QPA2060D1)
x(CO2+T)
149-910
- Duct-
mount CO2
QPM2100
x
149-909
- Duct-
mount VOC
+ CO2
QPM2102
x
149-909
- Duct-
mount CO2
with
temperature
QPM2160
x(CO2+T)
149-909
* The documents can be downloaded from Siemens US Download Center by specifying
the product number as shown in the above table.
1) With digital display

Summary
Associated Equipment
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Replacement Part
Description
Model
Number
Orderable Part
Number
Plastic trim plate and metal
mounting plate for 2" ×4"
box (1 set)
ARG100.01
S55772-T102

Installation
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2Installation
●The thermostat is designed for wall mounting.
●The recommended height is 5 feet above the floor.
●Do not mount the thermostat in recesses, shelves, behind curtains or doors,
or above or near heat sources.
●Avoid direct exposure to sun and drafts.
●Seal the conduit and/or wall opening, as drafts can affect sensor readings.
●Observe maximum ambient conditions.
1. Switch off power to the heating/cooling system at the breaker or system
power switch.
2. Remove the old thermostat from the wall with wires still connected.
3. Using the provided wire decals , label the existing wire connections. It is also
helpful to take a picture of the current wire connections for subsequent
reference.
Mounting
Installing the
thermostat

Installation
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4. Disconnect all the labeled wires and then remove the old thermostat.
NOTICE! Do not discard the old thermostat in the trash if it contains
mercury. Contact a thermostat recycling organization, for example,
www.thermostat-recycle.org, for safe disposal of the old thermostat.
5. Check whether more wires are needed to bring 24 Vac power from the
HVAC equipment to the thermostat. If yes, prepare the wires and label them
accordingly.
6. Seal the conduit and/or wall opening to prevent entrance of cold or warm
air and ensure accurate temperature readings by the internal sensor.
7. Install the mounting plate and power unit.
–If you are mounting the thermostat directly on a wall, screw the small
mounting plate enclosed with the thermostat snugly on the wall using a
screwdriver, making sure that the mounting plate is placed correctly (the
part with the upward arrow is placed on the top), and then screw the
power unit on the mounting plate.
–If you are mounting the thermostat on a conduit box, install the metal
mounting plate enclosed with the thermostat tightly on the conduit box
(making sure that the upward arrow part is placed on the top), attach the
plastic trim plate to the mounting plate, and secure by screws.

Installation
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Tip: Before installing the power unit, it is highly recommended the
labeled wires be connected to the terminals snugly according to the
thermostat terminal designations (you may also refer to the picture taken
in Step3). Do not overtighten.
NOTICE! a) The following illustration is for reference, which may be
different from the wiring for your application. b) The thermostat only
works with low-voltage wires (AC 24 V), so it is very important to
make sure that the thermostat is not connected to high-voltage
wires.
8. Attach the front module horizontally, making sure that each side of the front
module fully aligns with that of the power unit, and then press the corners
following the order described in the following illustration until you hear a
click sound. Note that you need to discharge the static electricity on your
body before mounting the front module. For example, touching the wall
could help on Electro-Static discharge (ESD).
9. Switch on power to the heating/cooling system. The thermostat should be
powered up as well.
See Mounting instructions for more information.
Wiring

Installation
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●Observe local codes regarding wire type, overcurrent protection and ground.
●For HVAC systems with a single transformer, the RH-RC jumper must remain
in place. If separate transformers are used for heating and cooling systems,
remove the RH-RC jumper.
●24 Vac supply line must have a circuit breaker with a rated current of no
more than 4 A. The total current rating should not exceed 3.3 A. For 24 Vac
US installations, use Class 2 transformers.
●Disconnect from power supply before removing the front module and the
mounting plate.

Setup wizard
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3Setup wizard
When the thermostat is powered up for the first time, a setup wizard displays to
guide you through the following procedures:
●Setting a display language
●Setting an administrator password
●Setting up a network connection and choosing the network connection type
●Selecting an equipment type and setting up the details
●Configuring date
●Specifying a name to the location where the thermostat is installed
For more details, see the Quick guide.

Presence detection
Presence detection using the built-in PIR sensor
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4Presence detection
4.1 Presence detection using the built-in PIR
sensor
By using a built-in presence detection sensor (also called PIR (Passive infrared
detector) sensor), the thermostat can detect the space occupancy and then do
the following:
●Activate the idle display. When no operations are performed, the thermostat
detects whether someone is in the room or not. If it detects someone is in
the room, it displays information such as room temperature, room air quality
and relative room humidity. If it detects no one is in the room, it turns off
the screen.
●Change the operating mode from Unoccupied to Comfort. If an unoccupied
room is detected to be occupied when a scheduled Unoccupied mode is
running, the thermostat switches to Comfort automatically until the next
scheduled mode starts. However, you can decide not to switch to Comfort if
you want. For more information about operating modes, see the User guide.
Sensor position
1
The location of the PIR sensor. It is a black area if seen from the front of
the front module.

Presence detection
Approach detection
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Sensor detection range
A
The width of each cell. It is 80 cm (31 in).
B
The thermostat.
C
The height of each cell. It is 80 cm (31 in).
D
The area that the PIR sensor can detect.
To disable the switch from Unoccupied to Comfort even if the
room is occupied
1. From the Home screen, tap , tap and then tap .
2. If prompted, enter the administrator password.
3. Tap , tap , and then tap . Scroll down and tap Room presence
detector.
4. Drag the slider to the left if Active is displayed on the screen.
4.2 Approach detection
The thermostat has a built-in approach sensor. It can detect someone
approaching the thermostat. If activity is sensed within 10 cm, it will switch from
its idle screen to the main home screen with full temperature and setpoint
display.

Presence detection
Approach detection
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Sensor position
1
The location of the approach sensor.

Changing system setup
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5Changing system setup
Go to Advanced Settings if necessary to reconfigure initial setup options and
change some other default system setup options as desired.
Changing the basic configurations of the thermostat is to select either
Conventional or Heat pump and adjust the basic heating/cooling settings for
the selected equipment type.
To change the basic configurations
1. From the Home screen, tap , tap and then tap .
2. If prompted, enter the administrator password.
3. Tap and then tap .
4. Tap OK to stop all of the thermostat’s applications. The thermostat restarts.
5. After the restart is completed, tap Equipment and then tap Adapt.
6. Select the equipment type that you want to change settings for.
7. If Conventional is selected, change the heating/cooling stage value or fan
operation condition as desired (you can decide if the fan operates when
heating is energized).
8. If Heat pump is selected, change the following as needed:
–Heating/cooling stage value.
–Reversing valve’s operating condition. You can decide to energize the
reversing valve for heating or cooling.
–Auxiliary heating stage and operation condition. Two auxiliary heating
stages are available. Once you’ve selected one stage, you can decide if
the auxiliary heating device is allowed during heat pump operation.
Normally, when the heat pump is running, an auxiliary electrical heating
system is allowed but an auxiliary gas heating system is not.
NOTE: Refer to the following part to configure some other relevant advanced
settings.
By changing extended configurations, you can:
●Change input assignments. Before any reconfigurations or changes to
another input, it is strongly recommended corresponding peripheral devices
be connected to terminal X1 or X2. The input can be:
–Room temperature
–Operating mode switch
The thermostat switches to the OFF mode if the input is configured as
Normally open. For example, if a thermostat in a hotel is configured to
Normally open for this input, when a hotel guest pulls out the room
card, it activates Normally open. The thermostat switches to the OFF
mode. Once the room card is inserted again, the thermostat restarts the
previously running mode.
If the X1 or X2 input is assigned as Operating mode switch and
configured as Normally open but physically terminal X1/X2 is not
connected with any corresponding peripheral devices, the thermostat
may switch to the OFF mode in the end and refuse to function normally
unless you change to another input.
–Universal contact
Changing basic
configurations
Changing extended
configurations

Changing system setup
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–Outside air temperature
–Room air humidity
–Presence detector
–Condensation monitor. If the thermostat receives an input from a
condensation monitor, it will display a notification on the mobile app.
The thermostat does not alter operation based on this input.
–Room air quality
●Change input signal types based on the assigned input type. The following
signal types are supported:
NOTICE! If the corresponding application hasn't been configured, some
inputs may not be selectable.
–Digital input, normally open or closed
–1k Ohm @ 32 F Ni RTD (LG-Ni1000)
–1k Ohm Pt. RTD (385a)
–1k Ohm Pt RTD (375a)
–Type 2 Thermistor
–0 to 10 V*
●Set sensor evaluation mode if an external sensor is connected to either
terminal X1 or X2. You can use either the built-in and external sensors, or the
external sensors, for controlling and monitoring. The former is selected by
default. However, if no physical external sensors are connected to any
control inputs or if the input values are invalid, only the built-in sensors are
used instead to provide values for the thermostat. If external sensors are
connected and can provide valid values with the built-in sensors, the
thermostat reacts differently depending on the type of the external sensor:
–Displays the average value if it is an external temperature or humidity
sensor.
–Takes the higher value if it is an external VOC sensor.
–Enable presence detection related functions no matter whether it is the
external or the built-in presence detection sensor detects that someone
is in the room.
●If the selected equipment type is Heat pump, decide if the heat pump shall
be switched off below a certain outside air temperature. If yes, specify the
default temperature value. Note that an external outside air temperature
sensor is required to be connected with the thermostat to get the outside
temperature.
●If the selected equipment type is Heat pump and auxiliary heating is
allowed to operate when the heat pump is running, you can decide if the
auxiliary heating device shall be switched off above a certain outside air
temperature. If yes, specify the default temperature value. Note that an
external outside air temperature sensor is required to be connected with the
thermostat to get the outside temperature.
●Configure the output as a humidifier, humidifier free-standing, dehumidifier,
dehumidifier free-standing or an outside air damper.
●Activate or deactivate dehumidification. If the output is not configured as a
dehumidifier or dehumidifier free-standing, the thermostat takes use of the
heat pump or cooling system to dehumidify the space. However, the heat
pump turns off cooling (if cooling operation is running) whenever there is a
dehumidification command.
●Activate or deactivate ventilation. Only when the output is configured as an
outside air damper can the ventilation function be activated. The ventilation
function is mainly used to improve the room air quality when the room is

Changing system setup
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detected to have worse air quality than the configured room air quality
setpoint under the Optimization page.
*) If 0 to 10 V is selected as the signal type, a DC 0 to10 V active sensor must be
connected with the thermostat. Otherwise, the calculated value may not be
accurate.
To change the extended configurations
1. On the Advanced Settings page, tap .
2. If prompted, enter the administrator password.
3. Tap and then tap .
4. Tap OK to stop all the thermostat’s applications. The thermostat restarts.
5. After the restart is completed, tap I/O and then tap Adapt.
6. Change the settings as desired.
You can reset the thermostat to its original factory settings. However, all user
data will be erased after the factory resetting.
To perform a factory reset
1. On the Advanced Settings page, tap .
2. If prompted, enter the administrator password.
3. Tap > .
4. Tap OK to stop all of the thermostat’s applications. The thermostat restarts.
5. After the restart is completed, tap Factory Reset.
6. Tap Reset. The thermostat is reset and restarted.
NOTE: After the thermostat is restarted, the setup wizard appears for easy
commissioning. Refer to the Quick guide for the detailed setup information.
Resetting the
thermostat

Managing application settings
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6Managing application settings
NOTE:
●Parameter availability depends on your selected application for the
thermostat.
●Numbers marked in the following tables are only for easy readability in this
document. They don't represent the parameter numbers in the local
thermostat.
No.
Application
settings
Descriptions
Factory
settings
Range
Dependencies
1.
X1 room
temp. ref. at
0V
Calibrates thermostat
to low end of
temperature sensor
signal (for example,
0V = 32°F)
32°F
(0℃)
-58…176°F
(-50…80 °C)
A DC 0 to 10V
external room
temperature
sensor must
be connected
with the
thermostat
using terminal
X1.
2.
X1 room
temp. ref. at
10V
Calibrates thermostat
to high end of
temperature sensor
signal (for example,
10V = 122°F)
122°F
(50℃)
-58…176°F
(-50…80 °C)
3.
X2 room
temp. ref. at
0V
Calibrates thermostat
to low end of
temperature sensor
signal (for example,
0V = 32°F)
32°F
(0℃)
-58…176°F
(-50…80°C)
A DC 0 to 10V
external room
temperature
sensor must
be connected
with the
thermostat
using terminal
X2.
4.
X2 room
temp. ref. at
10V
Calibrates thermostat
to high end of
temperature sensor
signal (for example,
10V = 122°F)
122°F
(50℃)
-58…176°F
(-50…80 C)
5.
Outside
temp. ref. at
0V
Calibrates thermostat
to low end of
temperature sensor
signal (for example,
0V = -58°F)
-58°F
(-50℃)
-58…176°F
(-50…80°C)
A DC 0 to 10V
external
outside air
temperature
sensor must
be connected.
6.
Outside
temp. ref. at
10V
Calibrates thermostat
to high end of
temperature sensor
signal (for example,
10V = 176°F)
176°F
(80℃)
-58…176°F
(-50…80°C)
Multi-functional inputs

Managing application settings
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No.
Application
settings
Descriptions
Factory
settings
Range
Dependencies
7.
Comfort
heating
setpoint
Scheduled heating
setpoint when space
is occupied. This
setpoint must be
higher than that for
Protection.
70°F
(21℃)
32…122°F
(0…50℃)
N/A
8.
Economy
heating
setpoint
Scheduled heating
setpoint during
transition from
Unoccupied to
Comfort. This
setpoint must be
higher than that for
Protection.
66°F
(19℃)
32…122°F
(0…50℃)
N/A
9.
Unoccupied
heating
setpoint
Scheduled heating
setpoint when space
is unoccupied. This
setpoint must be
higher than that for
Protection.
59°F
(15℃)
32…122°F
(0…50℃)
N/A
10.
Protection
heating
setpoint
Heating setpoint if
the operating mode
is OFF and
Protection is
enabled.
45°F
(7℃)
32…122°F
(0…50℃)
This setpoint is
valid only if
the default
Protection
option is
selected for
Application
setting No. 57.
11.
Max.
heating
setpoint
Maximum allowable
heating setpoint.
95°F
(35℃)
32…122°F
(0…50℃)
Heating setpoints

Managing application settings
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No.
Application
settings
Descriptions
Factory
settings
Range
Dependencies
12.
Comfort
cooling
setpoint
Scheduled cooling
setpoint when space
is occupied. This
setpoint must be
higher than all the
heating setpoints
and lower than the
cooling setpoint for
Protection.
75°F
(24℃)
32…122 F
(0…50℃)
N/A
13.
Economy
cooling
setpoint
Scheduled cooling
setpoint during
transition from
Unoccupied to
Comfort. This
setpoint must be
higher than all the
heating setpoints
and lower than the
cooling setpoint for
Protection.
77°F
(25℃)
32…122 F
(0…50℃)
N/A
14.
Unoccupied
cooling
setpoint
Scheduled cooling
setpoint when space
is unoccupied. This
setpoint must be
higher than all the
heating setpoints
and lower than the
cooling setpoint for
Protection.
86°F
(30℃)
32…122 F
(0…50℃)
N/A
15.
Protection
cooling
setpoint
Cooling setpoint if
the operating mode
is OFF and
Protection is
enabled. This
setpoint must be
higher than all the
heating setpoints.
95°F
(35℃)
32…122 F
(0…50℃)
This setpoint is
valid only if
the default
Protection
option is
selected for
Application
setting No. 57.
16.
Min.
cooling
setpoint
cool.
Minimum allowable
cooling setpoint.
45°F
(7 ℃)
32…122 F
(0…50℃)
The cooling
protection
setpoint is
valid only if
the default
Protection
option is
selected for
Application
setting No. 57.
Cooling setpoints

Managing application settings
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No.
Application
settings
Descriptions
Factory
settings
Range
Dependencies
17.
Comfort
humidity
setpoint
Scheduled
humidification
setpoint when space
is occupied. This
setpoint must be
higher than that for
Protection.
40%RH
0…100%RH
Displays only if
the output is
configured as
Humidifier
(no fan).
18.
Economy
humidity
setpoint
Scheduled
humidification
setpoint during
transition from
Unoccupied to
Comfort. This
setpoint must be
higher than that for
Protection.
40%RH
0…100%RH
19.
Unoccupied
humidity
setpoint
Scheduled
humidification
setpoint when space
is unoccupied.
30%RH
0…100%RH
20.
Protection
humidity
setpoint
The humidification
setpoint if the
operating mode is
OFF and Protection
is enabled. This
setpoint must be
lower than all the
dehumidification
setpoints..
30%RH
0…100%RH
This setting
displays only if
the output is
configured as
Humidifier
(no fan) or
Humidifier
(fan) min. ON
time.
This setpoint is
valid only if
the default
Protection
option is
selected for
Application
setting No. 57.
NOTE: Humidification control works with a PID algorithm. The algorithm
continuously monitors the difference between the humidity setpoint for
humidification and the measured relative air humidity in the room and switches
the humidifier ON and OFF automatically to keep the humidity above the
setpoint. It is not possible to switch the humidifier ON and OFF manually.
Changing the setpoint will affect the humidification control to verify the
functionality.
Humidity setpoints