Siemens RDH100RF/SET Wireless Room Thermostat with LCD

Product Overview

The Siemens RDH100RF/SET is a wireless room thermostat system designed for controlling room temperature in heating systems. It comprises one RDH100RF transmitter and one RCR100/433 receiver.

Typical Applications:

• Homes
• Residential buildings
• Schools
• Offices

The device can be used with various heating equipment, including:

• Thermal valves or zone valves
• Combi boilers
• Gas or oil burners
• Pumps

Temperature Control Functions

The RDH100RF/SET offers two intelligent temperature control algorithms: 2-position and PID. The control behavior can be configured via parameter P01.

2-Position Control

This algorithm switches the heating system on and off within a switching differential (SD) based on the difference between the setpoint and the measured room temperature.

Diagram Description: A graph shows room temperature fluctuating around a setpoint, with distinct 'Boiler On' and 'Boiler Off' periods, illustrating the switching differential (ISD).

PID Intelligent Learning Control

This algorithm periodically switches the heating system on and off. The period time (T) and pulse length (P) of the control signal (PWM) are determined by the setpoint and the measured room temperature.

Diagram Description: A graph shows room temperature smoothly approaching and stabilizing at the setpoint, with 'Boiler On' and 'Boiler Off' periods that are dynamically adjusted.

PID control generally provides more comfort and is more energy-efficient than 2-position control.

Control Behavior (P01) Settings

The factory setting for control is 'PID slow'. Other options include:

• 2-position, 1 K: For systems with small capacity or applications requiring extended runtimes. Typical applications include dry floor heating systems, heat pumps, and electric heating with contactors.
• 2-position, 0.5 K: Offers better comfort than 1 K switching hysteresis and can be used for general or difficult control situations.
• PID slow: For slow heating systems requiring longer minimum On times and a limited number of switching cycles per hour. Typical applications include wet floor heating systems and oil-fired boilers. Minimum switch on/off time is > 4 minutes, with a minimum period of approximately 12 minutes.
• PID fast: For fast heating systems tolerating a high number of switching cycles. Typical applications include electric heaters with current valves, gas boilers, and fast thermal actuators. Minimum switch on/off time is > 1 minute, with a minimum period of approximately 6 minutes.

WARNING: Do not use PID fast for oil boilers or electric mechanical actuators.

Parameter Setting

Parameter settings are stored in non-volatile memory and are retained after battery removal. A reset function on the rear of the thermostat reloads factory settings.

Parameter List:

Parameter Setting Mode:

1. Press LEARN on the rear for 5 seconds until "P01" appears.
2. Press LEARN again; the parameter value flashes for adjustment.
3. Adjust the parameter using the setting knob.
4. Press LEARN to confirm.
5. Rotate the setting knob clockwise to the next parameter and repeat steps 2-4.
6. Exit by rotating the setting knob clockwise to "End" and pressing LEARN.

Note: The thermostat automatically exits parameter setting mode one minute after the last action.

Equipment Combinations

The system can be combined with:

• Electrothermal actuator (for radiator valves): Product number STA321, Data sheet A6V12986007
• Electrothermal actuator (for small valves 2.5mm): Product number STP321, Data sheet A6V12986007
• Electromotoric actuator: Product number SFA21.., Data sheet 4863

Documents can be downloaded from http://siemens.com/bt/download.

Display

The digital display shows the current room temperature and the comfort temperature setpoint. A triangle symbol △ indicates when the heating output is active.

Example Display: Current temperature 20.0 °C, Setpoint 25.0 °C.

Ordering

Specify name and product number when ordering, e.g., room temperature controller RDH100RF/SET. Valves and actuators should be ordered separately.

Mechanical Design

The transmitter consists of four parts:

• Plastic housing with digital display, electronics, operating elements, and built-in room temperature sensor.
• Baseplate (mounting base).
• Battery compartment.
• Fold-out stand.

The housing attaches to the baseplate, and a reset button is located on the rear of the transmitter.

Transmitter Elements

Diagram Description: A diagram of the transmitter shows numbered elements:

Receiver

The receiver is housed in a plastic casing with LEDs and buttons.

Diagram Description: A diagram of the receiver shows:

• LED Signal indicator
• LED Relay indicator
• OVERRIDE button
• LEARN button
• OVERRIDE & LEARN button (together = RESET function)

Transmitter Rear View

The transmitter has two buttons on the rear when the baseplate is removed:

• Test button
• Test & Learn button (together = RESET function)
• Learn button

Override Function

Override allows temporary overriding of the active value from the sender. The behavior depends on the radio connection status.

• Normal connection: Pressing OVERRIDE overwrites the value for approximately 14 minutes, after which it returns to the setpoint.
• Faulty connection: Pressing OVERRIDE permanently overrides the value. It returns to the setpoint once the connection is re-established.

RF LED Indicators

The RF LED indicates the status of the radio frequency connection:

Relay LED Indicators

The Relay LED indicates the status of the relay output:

Mounting Notes

Mount the transmitter by first attaching the baseplate to a flat wall. The transmitter can also be used as a "mobile" device with its fold-out stand.

The receiver does not require a baseplate. Connect electrical connections first, then secure the receiver according to local regulations.

EMI filters (e.g., KEILS EMI CW4L2-3-R) can reduce EMI disturbance. Refer to the connection diagram for details.

DANGER: Electric shock hazard. Disconnect from power supply before connecting EMI filter. Ensure EMI filter is out of reach after installation.

If the reference room has thermostatic radiator valves, set them to their fully open position.

Refer to operating instructions A6V101035988 for commissioning. The RDH100RF/SET transmitter and receiver are paired at the factory.

Diagram Description: An illustration shows recommended mounting height of 1.5 m above the floor and a minimum distance of 20 cm from corners.

• The devices are suitable for wall mounting.
• Recommended height: 1.5 m above the floor.

Important Usage and Safety Notes

• Do not mount devices in recesses, behind curtains, or near heat sources.
• Avoid direct solar radiation and drafts.
• Seal conduit boxes or installation tubes to prevent air currents from affecting sensor readings.
• Adhere to allowed ambient conditions.

Change of Batteries

Replace batteries when the battery symbol appears on the display.

Reset

To reset the transmitter: Simultaneously press the TEST and LEARN buttons on the rear.

To reset the receiver: Simultaneously press the OVERRIDE and LEARN buttons. This resets all individual settings to their default values.

Maintenance

The transmitter and receiver are maintenance-free, except for the transmitter battery.

Disposal

This symbol [waste bin with cross] indicates that the product, packaging, and batteries must not be disposed of as domestic waste. Dispose of items at separate collection and recycling facilities according to local and national legislation. Refer to Siemens information on disposal for details.

Instructions for the replacement of alkaline batteries

WARNING: Explosion due to fire or short-circuit, even with discharged batteries. Risk of injury due to flying parts.

• Prevent batteries from contacting water.
• Do not recharge batteries.
• Do not damage or disassemble batteries.
• Do not heat batteries over 85°C.

Leakage of electrolyte

WARNING: Severe burns. Handle damaged batteries with suitable protective gloves. In case of contact with electrolyte, rinse eyes immediately with plenty of water and consult a doctor.

Observe the following for battery replacement:

• Use only batteries of the same type and from the same manufacturer.
• Observe correct polarity (+/-).
• Ensure batteries are new and undamaged.
• Do not mix new and used batteries.
• Store, transport, and dispose of batteries in compliance with local regulations and laws.

Product Documentation

Related documents can be downloaded from http://siemens.com/bt/download.

Technical Data

Power supply

• Operating voltage: DC 3 V (2 x 1.5 V AA alkaline batteries)
• Battery life: >1 year (with AA alkaline batteries)

Sensor inputs

• Internal thermistor: 10 kΩ ± 1% at 25 °C

Radio frequency

• Frequency band: ISM 433MHZ
• Maximum radio-frequency power: 4.19 dBm

Operational data

• Setpoint setting range: 5...30 °C
• Factory setting comfort setpoint: 20 °C

Environmental conditions

Operation

• Climatic conditions: IEC 60721-3-3, Class 3K5
• Temperature: 0...+40 °C
• Humidity: <90% r.h.

Transport

• Climatic conditions: IEC 60721-3-2, Class 2K3
• Temperature: -25...+60 °C
• Humidity: <95% r.h.
• Mechanical conditions: Class 2M2

Storage

• Climatic conditions: IEC 60721-3-1, Class 1K3
• Temperature: -10...+60 °C
• Humidity: <90% r.h.

Standards, directives and approvals

• EU conformity (CE): A6V101123354 *)
• RCM conformity to EMC emission standard: A6V101123355*)
• Safety class: III as per EN 60950-1
• Pollution degree: 2
• Degree of protection of housing: IP20
• Environmental compatibility: Refer to product environmental declaration (A6V101123359 *) for details on RoHS compliance, materials, packaging, and disposal.

*) Documents can be downloaded from: http://siemens.com/bt/download.

Eco design and labeling directives

Based on EU Regulation 813/2013 (Eco design directive) and 811/2013 (Labeling directive):

General Data

Transmitter RDH100RF/SE

• Weight (including package): 475 g
• Color of housing front: Signal-white RAL9003
• Housing material: ABS (LCD lens: PC)

Receiver RCR100/433

General unit data

• Operating voltage: AC 230 V +10/-15%
• Power: <10 VA
• Frequency: 50...60 Hz

* EMI filter (e.g., KEILS EMI CW4L2-3-R) can be used to reduce EMI disturbance. See Connection diagram [14].

Outputs

• Switching capacity of relays: Voltage: AC 24...250 V, Current: 8 (3) A

No internal fuse! External preliminary protection with max. C 10 A circuit breaker required for all cases.

Switching outputs (LX, L1, L2)

Electrical connections

• Connections terminals (via baseplate): Screw terminals
• For solid wires: 2 x 1.5 mm²
• For stranded wires: 1 x 2.5 mm² (min. 0.5 mm²)

Environmental conditions

Operation

• Climatic conditions: IEC 60 721-3, Class 3K3
• Temperature: 0...+45 °C
• Humidity: <85% r.h.

Storage and transport

• Climatic conditions: IEC 60 721-3, Class 2K3
• Temperature: -25...+70 °C
• Humidity: <93% r.h.
• Mechanical conditions: Class 2M2

Standards, directives and approvals

• EU conformity (CE): A6V101123354
• Safety class: II as per EN 60 730-1
• Degree of pollution: 2

Color

• Unit front: Signal-white RAL 9003
• Base: Gray RAL 7035
• Dimensions: 83x104x32 mm

Connection diagram

Diagram Description: A wiring diagram illustrates the connections for the system.

Diagram Description: The diagram shows connections for L, N, Lx, L1, L2, PE, M1, Nx, N2, and Y1, with labels for voltage and current ratings.

Application examples

Diagram Description: Three diagrams illustrate typical application scenarios:

• Wireless room temperature controller with receiver control of a gas-fired wall-hung boiler.
• Wireless room temperature controller with receiver control of atmospheric gas burner.
• Wireless room temperature controller with receiver control of a heating circuit pump (precontrol by manual mixing valve).

Key:

• F1: Thermal reset limit thermostat
• F2: Safety limit thermostat
• M1: Circulating pump
• Y2: Magnetic valve
• N1: Room temperature controller RDH100RF (Transmitter)
• N2: RCR100/433 (Receiver)
• Y1: 3-port valve with manual adjustment

Dimensions [mm]

Room temperature controller

Diagram Description: Side and front views of the room temperature controller with dimensions indicated.

Dimensions: Width 90 mm, Height 120 mm, Depth 23.9 mm / 26.9 mm.

Room temperature controller mounting plate

Diagram Description: Top view of the mounting plate with screw hole positions and dimensions.

Dimensions: Various dimensions related to screw hole placement and plate size.

Room temperature receiver with mounting plate

Diagram Description: Side, top, and front views of the receiver with mounting plate, showing dimensions.

Dimensions: Width 84 mm, Height 104 mm, Depth 60 mm.

Product history

¹) Product index can be found next to the production date on the rear of the device "YYMMDDX".