ThermoSphere BT21 - Installing your thermostat; Switch off mains power

6
Installing your thermostat
Switch off mains power
You will be installing your thermostat as part of a
mains electrical circuit. To ensure your safety and
to protect the thermostat, isolate the circuit from
mains power.
Fuse Box Fused Switch
CAUTION
Mains Voltage
Cables
!
OFF
ON ON ON ON ON
OFF