
C-Stat 11-B | C-Stat 17-B
Installation Instructions
Battery Powered Programmable
Room Thermostat
Programmable room thermostats are widely recognised as one
of the best ways in which to control central heating. C-Stat
programmable room thermostats have a large display and
intuitive user interface, making them easy to set up and use. CStat uses a sophisticated load compensation (LC) algorithm for
accurate temperature control and energy efficiency. Being
battery powered, these models are suitable for replacing most
existing room thermostats.
Installation and connection should only be carried out by a
suitable qualified person and in accordance with the edition of
the IEE wiring regulation.
Warning: Isolate mains supply before commencing installation.

Positioning the C-Stat programmable room
thermostat
The C-Stat should be mounted on an internal wall
approximately 1.5 metres from floor level and should be
in a position away from draughts, direct heat and
sunlight. Ensure that there will be enough space to allow
access to the two retaining screws located at the base of
the wall plate
1.5m
2

Fitting the wall plate
To remove the wall plate from the C-Stat undo the two retaining
screws located on the underside, the wall plate should now be
easily removed. Once the wall plate has been removed from the
packaging please ensure the C-Stat is resealed to prevent
damage from dust, debris etc.
The wall plate should be fitted in a position which allows a total
clearance of at least 50mm around the C-Stat programmable
thermostat.
TOP
1 2 3 4 L N
1 2 3 4
TOP
L
N
Direct Wall Mounting
Offer the plate to the wall in the position the C-Stat is to be
mounted and mark the fixing positions through the slots in the
wall plate. Drill and plug the wall, then secure the plate in
position. The slots in the wall plate with compensate for any
misalignment of the fixings.
3

Wiring Box Mounting
The C-Stat wall plate may be fitted directly on to a single gang
steel flush wiring box complying with BS4662, using two M3.5
screws. The C-stat is suitable for mounting on a flat surface only;
it must not be positioned on an unearthed metal surface.
Electrical Connections
All necessary electrical connections should now be made. Flush
wiring can enter from the rear through the aperture in the wall
plate. The recommended cable size is 1.0mm².
Internal wiring diagram
C-STAT
COMMON
1 2 3 4
The C-Stat is double insulated and does not require an earth
connection, an earth connection block is provided on the wall
plate for terminating any cable earth conductors. Earth
continuity must be maintained and all bare earth conductors
must be sleeved. Ensure that no conductors are left protruding
outside the central space enclosed by the wall plate.
Ÿ The C-Stat has voltage free contacts
Ÿ The C-Stat is battery powered, therefore no mains connection
is required to power it.
Please ensure that all wiring complies with current IEE
regulations
4
CALL FOR
HEAT