CentaurPlus C11 & C17 Series 2
Installation Instructions
Horstmann CentaurPlus single channel timeswitches offer up to three
on/off periods a day with a one hour boost and instant advance facility.
Installation and connection should only be carried out by a suitably qualified
person and in accordance with the current edition
of the IEE wiring regulations.
WARNING: Isolate mains supply before commencing installation.
1
Fitting the backplate
Once the backplate has been removed from the packaging please ensure the timeswitch is
re-sealed to prevent damage from dust and debris.
The backplate should be fitted with the wiring terminals located at the top and in a
position that allows a total clearance at last 50mm around the unit.
Direct wall mounting
Offer the backplate to the wall in the position where the timeswitch is to be mounted,
remembering that the backplate fits to the left hand end of the control. Mark the fixing
positions through the slots on the backplate (fixing centres of 60.3mm), drill and plug the
wall, then secure the backplate in position. The slots in the backplate will compensate for
any misalignments of the fixings.
Wiring box mounting
The backplate may be fitted directly onto a single gang steel flush wiring box complying
with BS4662, using two M3.5 screws. CentaurPlus controls are suitable for mounting
on a flat surface only; they must not be positioned on a surface mounted wall box or on
unearthed metal surfaces.
2
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