In This Article we discuss about SIEMENS RDH 100 Room Thermostat with LCD Display for Heating system device overview and Technical Details.
Use :
- This thermostat is Non-programmable device and used for heating systems.
- 2-position or PID control to switch on/off heating systems.
- Inbuilt with Large LCD Display.
- Minimum and maximum setpoint limitation
- The RDH 100 is used to control the room temperature in heating systems.
Typical applications:
Homes, Residential buildings , Schools Offices ,
The device is used together with the following equipment:
Thermal valves or zone valves , Combi boilers , Gas or oil burners , Pumps
Function :
- RDH100 offers both 2-position and PID intelligent learning temperature control, configurable via parameter P01 (control behaviour).
- The 2-position control algorithm to switch on and off the heating system within a switching differential (SD) as per the difference between setpoint setting and measured room temperature.
- The period time (T) and pulse length (P) of the control signal (PWM) are determined by the setpoint and the measured room temperature. In general, PID control provides more comfort and is more energy efficient than 2-position control.
Backup :
- When removing the batteries, the setpoints and information required for operating mode changeover are retained for maximum 2 minutes.
Display :
- The digital display shows the current room temperature and the comfort temperature setpoint. When the heating output is active, the triangle symbol is displayed.
Mechanical design :
The device consists of 3 parts:
- Plastic housing with digital display containing the electronics, operating elements, and built-in room temperature sensor,
- Baseplate (mounting base),
- Battery compartment,
- The device is maintenance-free.
- Indicate as Display of the room temperature in °C / °F
- Indicate as Indicates a request for heating
- Indicate as Temperature setting knob
- Indicate as Battery compartment
- Indicate as Comfort temperature setpoint
- Indicate as Indicates low battery power; replace batteries
- When mounting the device, attach the baseplate first. Then, make the electrical connections, and fit and secure the device (refer to the separated mounting instructions A6V10974417).
- Mount the device on a flat wall and in compliance with local regulations.
- If the reference room contains thermostatic radiator valves, set them to their fully open position.
- The devices are suitable for wall mounting.
- Recommended height: 1.5 m above the floor.
- Do not mount the devices in recesses, shelves, behind curtains or doors, or above or near heat sources.
- Avoid direct solar radiation and drafts.
- Seal the conduit box or the installation tube if any, as air currents can affect sensor readings.
- Adhere to allowed ambient conditions.
Change of batteries :
- If the battery symbol appears, the batteries are almost empty and must be replaced.
- Use only a battery of the same type and from the same manufacturer as a replacement.
- Observe the polarities (+/-).
- The batteries must be new and undamaged.
- Do not mix new and used batteries.
- Store, transport and dispose of the batteries in compliance with local requirements, regulations and laws. Also observe the instructions of the battery manufacturer.
Reset :
- To reset, press the reset button on the rear of the device. This resets all individual settings to their default values.
Technical data
Operating voltage is DC 3 Volt (2 x 1.5 Volt alkaline batteries AAA),
Battery life is greater than 1 year (with AA alkaline batteries),
Internal sensor inputs is Thermistor 10 kilo ohm plus or minus 1% at 25 °C ,
Switching outputs (Lx, L1, L2) :
Relay contacts :
Switching voltage is maximum AC 250 Volt Minimum AC 24 Volt ,
Switching current is Maximum 5 Amps resistive and 2 Amps inductive , At AC 250 Volt Minimum 8 milliamps
Insulating strength :
Between relay contacts and coil is AC 3,750 Volt
Between relay contacts (same pole) is AC 1,000 Volt
Fuse : No internal fuse External preliminary protection with maximum C 10 A circuit breaker in the supply line required under all circumstances.
Operational data :
PID control:
Minimum period of slow time is 4 minutes
Minimum period of fast time is 2 minutes ,
Minimum pulse length of slow time is 12 minutes
Minimum pulse length of fast time is 6 minutes ,
RDH100 Setpoint setting range is 5 to 30 °C
RDH100 Factory setting comfort setpoint is 20 °C ,
RDH100 / special Setpoint setting range is 15 to 30 °C
RDH100 / special Factory setting comfort setpoint is 20 °C ,
Resolution of settings and displays :
Temperature setpoint is 0.5 °C
Display of actual temperature value is 0.5 °C
Electrical connections :
Connections terminals (via baseplate) is Screw terminals
For solid wires is 2 x 1.5 mm2
For stranded wires is 1 x 2.5 mm2 (minimum 0.5 mm2 )
Environmental conditions :
Operation is As per IEC 721-3-3
Climatic conditions is Class 3K5
Temperature is 0 to 40 °C
Humidity is less than 90% RH
Transport is As per IEC 721-3-2
Climatic conditions is Class 2K3
Temperature is –minus 25 to plus 60 °C
Humidity is less than 95% RH
Mechanical conditions is Class 2M2
Storage is As per IEC 721-3-1
Climatic conditions is Class 1K3
Temperature is –minus 10 to plus 60 °C
Humidity is less than 95% RH
Weight is 350 gram
Colour of housing front is Signal-white RAL9003
Housing material is ABS (LCD lens:PC)
Degree of protection of housing is IP20
Dimension is Height 120 mm , width 90 mm , depth 26.9 mm
No comments:
Post a Comment