2
Issue 1.0
Product Overview
The E827 offers an accurate, high quality and contemporary solution to tamperproof temperature
control with the added benefit of an energy-saving automatic setback feature.
Utilising a high accuracy temperature sensor and high power output relay, the E827 controls room
heating via its voltage-free switched output to maintain the room temperature at one of two different
selectable levels.
The setback mode (frost / background temperature) will continuously regulate the room to a selected
temperature below the setpoint, helping to achieve energy savings when the room is unoccupied as
well as providing an acceptable minimum room temperature and frost protection.
The setpoint (higher room temperature / boost) temperature level may be activated by pressing the
touch-sensitive pushbutton once the room becomes occupied and the temperature is required to be
maintained at a higher level. The red LED on the front of the device indicates this mode is active.
After a pre-selected time period in the boost mode, the thermostat will automatically switch to the
setback mode until the pushbutton is again pressed.
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). On the 24 volt product variant (“/24V”) the same terminals are used (24V AC
3. or DC) and are not polarity sensitive.
4. A voltage-free changeover relay output capable of switching loads of up to 10A, 250V AC (resistive)
is provided by the thermostat. Connect to your application in an appropriate manner given the
following:
•
The Common “COM” terminal is connected to the Normally Open “NO” terminal when the
sensed room temperature is below the selected temperature.
•
Conversely, the “COM” terminal is connected to the Normally Closed “NC” terminal when the
sensed room temperature is above the selected temperature.
