MS Electronics E814 Product Manual

Issue 1.2

Product Guide

E814

today, tomorrow and in the future

mselectronics.co.uk

Standard Robust Thermostat
with semi-automatic on/off control

Product Overview

The E814 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 E814 regulates to a fully adjustable temperature set-point between +12°C and +26°C,
combined with an adjustable temperature hysteresis (differential) of anything between 0.25°C and
5°C.
The E814’s external pushbutton allows the room user to switch off the unit. Thermostatic
control will automatically be restored after the “Off Timeout” period has elapsed. LED indicators
illuminate to display the state of the thermostat (ON or OFF).

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 tted 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

2Issue 1.2