Room thermostat with large LCD RDH100

Description

Room thermostat with large LCD Siemens RDH100

Non-programmable, for heating systems

• 2-position or PID control to switch on/off heating systems
• Large LCD
• Minimum and maximum setpoint limitation
• Battery-powered: 2 x alkaline batteries type AA, 1.5 V.

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.

RDH100 offers both 2-position and PID intelligent learning temperature control, configurable via parameter P01 (control behaviour).

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.

PID intelligent learning control algorithm periodically switches on and off the heating system. 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. The factory setting for control is “PID slow”, ideal for most heating systems. Optimum control
can be selected if control does not provide the desired result:

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)
Internal sensor inputs
Thermistor 10 k˖ ± 1% at 25 °C

Switching outputs (Lx, L1, L2)
Relay contacts Switching voltage Max. AC 250 V Min. AC 24 V
Switching current Max. 5 A res., 2 A ind. At AC 250 V Min. 8 mA
Insulating strength Between relay contacts and coil AC 3,750 V
Between relay contacts (same pole) AC 1,000 V

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 )