Wiring Instructions
Notes On Advanced Settings
1.
Temp calibration: Calibrate the temp detected by room sensor or
floor sensor.
2.
Anti-frozen function: This option allows you to prevent your room
freezing in really cold weather.
3.
Sensor select:
Room sensor: Run by room sensor. Floor sensor: Run by floor sensor.
Both sensors: Run by room sensor with floor temp limit.
4.
Floor temp limit: Always use floor sensor for underfloor heating.
5.
Temp unit: °C and °F can be selected.
6.
Output delay: This option help you avoid inadvertent operation on
heating.
7.
Temp tolerance: The value is 1°C. The thermostat starts to heat when
the actual temp is 1°C lower than set temp and stops heating when the
actual temp is 1°C higher than set temp.
8.
Brightness: This option allows you to change the brightness of the
display.
9.
Energy use: N/A.
10.
Schedule: Select a weekly schedule to edit. There are 2 options:
7: each day from Mon to Sun can be set individually.
5+1+1: 5 days from Mon to Fri have the same events, Sat and
Sun can
be set individually.
11.
Adaptive function: After several days of installation and
use, Adaptive function ensures that the required temp has
already been reached when the next event begins. Only
switch on when regular heating pattern is established.
12.
Reset: Yes - All parameters are restored to default values.
Installation Instructions
This Timerstat should only be wired by a ‘Part P’ qualified
Electrician as required by IEE regulations.
The power supply
must be on an RCD protected circuit and connected via a
correctly fused switched fused spur isolator. Guarantee is void if
these provisions are not followed.
Before connecting, please test the resistance of the heating
cable/s against the values shown in the relevant installation
manual to make sure the cable h
asn’t been damaged. Also test
between live/earth and neutral/earth for a zero reading. Check
the floor probe resistance is in the range of 10K Ohms
The ET-81 timerstat should be mounted using an 86x86x35mm
deep wall box.
Loosen the silver fixing screw on the bottom of the timerstat and
separate the front from the back.
Wire the timerstat back section as the above diagram. A
maximum of 2 heating cables will go into the wire connectors.
More than this should be connected into a junction box with a
single correctly sized wire to the timerstat. Main
’
s earth and
heating cable earth should be connected behind the timerstat
using a block connector.
Don’t forget
to connect the floor probe
(not polarised) otherwise the timerstat will not work properly.
Reassemble the front to the back and ensure the pins are located
in the socket on the back otherwise it will not work and tighten
up the
silver screw.
