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Siemens Smart Infrastructure - RDJ100 ROOM THERMOSTAT, CENTRAL HEATING CONTROL, HEATING SYSTEMS, 24 HOUR TIME SWITCH, PROGRAMMABLE, ON/OFF, PID CONTROL, 2 POSITION, LCD, FROST PREVENTION, SERVICE INTERVAL REMINDER. REQUIRES 2 X AA BATTERIES

RDJ100 / S55770-T379

Manufacturer: Siemens Smart Infrastructure
ROOM THERMOSTAT, CENTRAL HEATING CONTROL, HEATING SYSTEMS, 24 HOUR TIME SWITCH, PROGRAMMABLE, ON/OFF, PID CONTROL, 2 POSITION, LCD, FROST PREVENTION, SERVICE INTERVAL REMINDER. REQUIRES 2 X AA BATTERIES

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135 in stock

Order by 16:00 for same day UK despatch

Price: £40.00
Our Price
£27.33
£32.80 (IncVAT)
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Room Thermostat, Central Heating Control, Heating Systems, 24 Hour Time Switch, Programmable

RDJ100 battery powered, digital, daily programmable room thermostat features large easy to read LCD display and mechanical control dial. Featuring 4 operating modes - Automatic, Comfort, Energy saving and Frost protection, volt free relay contacts, and an advance/override facility. Moving the sliding on the control panel selects the respective mode.

The high-resolution digital display shows operating mode, actual room temperature and the ON/OFF times. The triangle symbol indicates a heating demand, and the battery symbol indicates that the batteries need replacing.

Typically used to control the ambient temperature of a room in a heating system, applications include – homes and residential building, schools, and offices. This room thermostat forms part of a central heating system and is used in conjunction with thermal valves or zone valves, combi boilers, gas or oil burners and pumps.

Simplified Temperature Control

A built-in service interval reminder function is an aid to carry out a safety check on the boiler at regular intervals and there is also a reset button on the rear of the device. This room thermostat consists of 3 parts, the plastic housing containing the LCD, electronics, operating elements, and sensors. The baseplate – mounting plate, and the battery compartment.

Note: This room thermostat control unit is not Wi-Fi enabled and requires wiring and installing by a competent engineer. Do not mount in recesses, shelves, behind curtains or doors or above heat sources. Avoid direct solar radiation and drafts and seal the conduit box or installation tube as air currents can affect the sensor readings.

The RDJ100 Room Thermostat is available as a kit with a transmitter/receiver device – see here.

Programmable Room Thermostat Features

  • 24 Hour temperature control switch
  • 2 position or PID control to switch on/off heating systems
  • Adjustment dial
  • Features 4 operating modes - Automatic, Comfort, Energy saving, Frost protection
  • Service interval reminder
  • Large clear LCD display
  • Minimum and maximum set points
  • Power Supply - 2 x AA 1.5V Alkaline batteries recommended
  • Switching Voltage - 24 - 250 VAC
  • Temperature Setting Range 5 to 30° C
  • Dimensions HxWxD - 120 x 90 x 26.9 mm
  • Protection rating IP20
  • Screw terminals for solid and stranded

Product Information

Alternative Part Number: S55770-T379
Manufacturer: Siemens Smart Infrastructure
Pricing Unit: Each
Weight: 0.325 kg (each)
Tariff code: 85369095
Generic code: SIEHVAC
GTIN/UPC/EAN: 7612914110930

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Kempston Controls is electrical and electronic components distributor, providing fuses, sensors, control components, industrial automation equipment and more. If you would like to discuss any of the parts which you see on our online store, please contact our dedicated sales centre on +44 (0) 1933 411411.

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