E811 Two Stage Set-Back Thermostat
E811 Two Stage Tamperproof ThermostatE811 Label Front

(click any image to enlarge)

E811 Two Stage Set-Back Tamperproof Thermostat

Product Code: E811

The E811 is a high quality vandal-resistant two stage set-back tamperproof thermostat designed to accurately control fan convectors in schools and public or commercial buildings to within 0.5°C.

The E811 has two stages of control. Below a 3°C fixed temperature offset down from the chosen temperature setpoint, the thermostat will select the high-speed fan to bring the room quickly up to temperature. Once the unit has achieved this level it then switches to the low-speed fan for normal daytime use, regulating the room temperature up to the pre-selected temperature setpoint.

Once the room temperature eventually reaches the chosen temperature setpoint the fan is turned off. This makes for quieter operation during normal daytime occupancy periods with the added benefit of rapidly bringing the room up to temperature when the heating is initially switched on.

The thermostat also provides set-back functionality. The end-user can use the pushbutton on the side of the unit to select between two different temperature setpoints. LED indicators illuminate to clearly identify whether the High or Low temperature setpoint is selected. The 3°C fixed temperature offset for the 2-stage control is maintained relative to the selected temperature setpoint.

Robust Range Variants:
Remote Sensor (/RS)

Remotely located temperature sensor.

*For a full description please see relevant variation below.

Download product datasheet (1896Kb)

Product features:

  • 10 Amp switching capacity
  • 2-stage control
  • 5 year guarantee
  • Energy-saving product
  • Money-saving product
  • Suitable for heating control
  • Tamper-proof features
  • Very robust and rugged product

£93.00 (ex. VAT)

Add to basket

E811 Two Stage Set-Back Thermostat

E811/RS Two Stage Set-Back Tamperproof Thermostat £88.00

Product Code: E811/RS

The E811/RS is a high quality vandal-resistant and tamperproof 2-stage thermostat designed to accurately control fan convectors in schools and public or commercial buildings to within 0.5°C. read more

Add to basket

manfactured to order - please allow up to 7 working days for delivery

Power supply

85V – 265V AC, 50 – 60Hz (live/neutral/earth)

Output switch rating

10A, 250V AC (resistive)

Output switch type

On/Off: Single relay (volt-free)
High/Low: Changeover relay (volt-free)

Temperature control

[high Setpoint]: +12°C to +26°C
[low Setpoint]: 0°C to 14°C below the high Setpoint

Temperature differential

0.25°C to 4°C

Temperature fan speed control

3°C (fixed) below the switching point:
• High mode: Switching point = Setpoint
• Low mode: Switching point = Setpoint – Set-back

Sensor accuracy

±0.2°C

Sensor drift

±0.15°C over 5 years

Guarantee

5 Years

Weight

0.34Kg

Dimensions

120mm x 95mm x 35mm

MSD-150 Temperature Sensor

MSD-150 Air Temperature Sensor £14.00

Product Code: MSD-150

A thermistor potted in a plastic enclosure and coated with a black rubberised finish, supplied with 80mm flying leads.  Can be installed into a 12.5mm hole using the supplied nut or into an existing PG7 thread. This is the standard temperature sensor used in the entire Robust Range of Thermostats. read more

Add to basket

MSD-152 Tamperproof Screwdriver

MSD-152 Tamperproof Screwdriver £12.80

Product Code: MSD-152

Tamperproof screwdriver for MSD-153 tamperproof screws.  Required to gain access into the entire Robust Range of Tamperproof thermostats and humidistats. read more

Add to basket

MSD-224 Temperature Sensor (internal box)

MSD-224 Air Temperature Sensor (internal box) £18.00

Product Code: MSD-224

An MSD-150 temperature sensor installed in a white plastic box and connected to a terminal block.  Pre-drilled mounting holes allow easy installation anywhere internally within a building. read more

Add to basket

manfactured to order - please allow up to 7 working days for delivery

MSD-370 Air Temperature Sensor (internal faceplate)

MSD-370 Air Temperature Sensor (internal faceplate) £18.00

Product Code: MSD-370

An MSD-150 temperature sensor installed in a white single-gang British Standard faceplate and connected to a terminal block for convenient remote temperature measurement of a room. Supplied with 2 x 25mm M3.5 fixings.  A surface-mounted pattress box is available separately as an accessory. read more

Add to basket

manfactured to order - please allow up to 7 working days for delivery