Product Overview
The E818/F offers a high quality and robust solution to tamperproof energy saving thermostatic control. It
utilises a high-accuracy radiant heat sensor in conjunction with its die-cast aluminium case and tamperproof
screws to ensure vandal-resistant, yet accurate tamperproof energy control.
The E818/F is a standard set-back thermostat with a set-point between -2°C and +12°C, combined with an
adjustable temperature hysteresis (differential) of anything between 0.25°C and 5°C and a set-back of up
to 14°C. The thermostat regulates to one of two preset temperatures which can be chosen between by the
end-user using a remotely located toggle switch/latching pushbutton, providing greater temperature control
to the end-user while helping to reduce overall heating energy consumption. For clarity, two LEDs on the
unit indicate which temperature set-point has been selected.
The E818/F can also be controlled remotely by any device that can provide a voltage-free latching contact
such as a time-clock, PIR presence detector or BMS relay for example. This eliminates the user interface
for switching between the high and low modes, providing an effective solution to heating areas that are
infrequently occupied.
Product Wiring
1. IMPORTANT
: ensure all electrical connections are isolated before commencing any work on the unit.
2. Power to the thermostat is provided via the Live and Neutral input terminals labelled “L” and “N” (230V
AC, 50Hz). This supply should be suitably fused (recommended: 1A slow blow).
3. NOTE
: This thermostat MUST be earthed using the earth terminal provided.
4. A voltage-free changeover relay output capable of switching loads of up to 10A, 250V AC (resistive) is
provided by the thermostat.
5. The Common “COM” terminal is connected to the Normally Open “N/O” terminal when the sensed room
temperature is above the “Setpoint” temperature.
6. Conversely, it is connected to the Normally Closed “N/C” terminal when the room temperature is sensed
to be below the “Setpoint”.
7.
The temperature sensor is factory fitted to all models with the exception of the Remote Sensor versions.
The 2-core screened cable connection should be made to the “Temp. Sensor” terminals in this case.
Figure 1
Typical wiring example
2
Issue 1.2