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Installation Safety Notes
This unit must be installed by a suitably qualified person in accordance with the latest IEE
Wiring Regulations.
Isolate mains supply before commencing installation. Please read all installation
instructions before proceeding.
Ensure that the fixed wiring connections to the mains supply is via a fuse rated at not more
than 6 amps and a class 'A' switch having a contact separation of a minimum of 3mm in all
poles. The recommended cable sizes are 1.0mm
If the unit is fitted to a metal surface, IT IS ESSENTIAL that the metal be earthed.
DO NOT use a surface mounting box.
No earth connection is required as the product is double insulated but ensure continuity of
earth throughout the system.
NEVER fit or remove the unit to a live wall-plate.
Fitting Back Plate – Direct Wall Mounting
1. Position the wall-plate (terminals along top edge) with 60mm (min) clearance to its right,
25mm (min) above, 90mm (min) below. Ensure that the supporting surface will fully cover
the back of the programmer.
2. The ideal location would be 1.4M above floor level, easily accessible, reasonably lit and
free from condensation or temperature extremes.
3. Offer the back plate to the wall in the position where the programmer is to be mounted
remembering that the back plate fits to the left hand end of the programmer. Mark the fixing
positions through the slots in the backplate, drill and plug wall, then secure back plate in
position using screws.
4. All necessary electrical connections should now be made. Ensure that the wiring to the
wall-plate terminals leads directly away from the terminals and is completely
enclosed within the wall-plate aperture. Wire ends must be stripped and screwed to
the terminals so that minimal bare wire is showing.
Fitting Back Plate – Wiring Box Mounting
1. Fix the wall-plate to a flush mounting single conduit box type UA1 (BS4662) using M3.5 x
14 screws. Take care to ensure the opening is adequate and will allow mounting of the unit
onto the base plate. The use of glue, mastic, or other sealants MUST NOT be used to secure
the unit to the wall.
2. All necessary electrical connections should now be made. Ensure that the wiring to the
wall-plate terminals leads directly away from the terminals and is completely enclosed within
the wall-plate aperture. Wire ends must be stripped and screwed to the terminals so that
minimal bare wire is showing.
2
2
or 1.5mm
New Installations
Example circuit diagrams for typical installations are show below. These diagrams are
schematic and should be used as a guide only.
Please ensure that all installations comply with the current IEE regulations.
For reasons of space and clarity not every system has been included and the diagrams have
been simplified, for instance some Earth connections have been omitted.
Other control components shown in the diagrams i.e. Valves, RoomStats etc are general
representations only. However the wiring detail can be applied to the corresponding models of
most manufacturers e.g. Horstmann, Honeywell, Danfoss Randall, Drayton etc.
Cylinder and Room Thermostat Key:
C=Common Call = Call for heat or break on rise SAT = Satisfield on rise N= Neutral
Existing Installations
1. Remove old programmer from its back plate mounting loosening any securing screws as
dictated by its design.
2. Check compatibility of existing back plate & wiring arrangement with that of the new
programmer. See online Programmer Compatibility Guide for direction.
3. Make all necessary changes to back plate & wiring arrangement to suit new
programmer
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