3
Installation Instructions
Product overview
The CET B-RF is a battery powered cylinder thermostat 
which measures cylinder temperature using a strap-on 
temperature sensor. The sensor is  tted to the cylinder 
wall and wired to the thermostat, which is normally 
located adjacent to the cylinder. 
To avoid the need for wiring, the thermostat and boiler 
or zone valve communicate to each other using secure 
RF wireless communication. A receiver unit is mounted 
next to the boiler or control valve and responds to 
commands issued by the wireless thermostat.
Product overview