Corston European Back Box & Render Trim Instructions

Included Components

• Back box (screws supplied inside): 1 [Illustration of a back box]
• Divider: 1 [Illustration of a divider piece]
• Cover: 1 [Illustration of a back box cover]
• Render trim (if purchased): 1 [Illustration of a render trim]

Tools You'll Need

• Spirit level ?
• Rule ?
• Drill ?
• 71mm plaster or brick hole saw (Models: 36892 / 37735) ?️
• 16, 22 or 25mm drill bit (for conduit holes) ?
• Screwdriver ?
• Pliers ?
• Plaster saw or wall chaser ?
• Remover tool (Model: 33480) ?️
• Nails and hammer or permanent adhesive ?
• Wall finishing equipment ?️

These back boxes are specially designed by Corston to complement their Kew range of flush plates, featuring a unique installation process. This guide is not suitable for use with standard European back boxes.

Installation Instructions

1. Step 1: Mark Horizontal Line

   Draw a horizontal line on the wall.

   [Illustration: Spirit level on wall, drawing a horizontal line.]

2. Step 2: Prepare Wall Opening

   Plasterboard: Align the back box with the horizontal line and press firmly against the wall, allowing the integrated spikes to impress marks on the surface.

   Brick wall: Measure and mark the wall according to the specified dimensions: 142mm distance between hole centres and 71mm diameter for each hole.

   [Illustration: Plasterboard installation showing box spikes impressing. Brick wall installation showing ruler with 142mm and 71mm measurements.]

3. Step 3: Drill Holes

   Using the markings as centrepoints, drill 71mm diameter holes in the wall.

   [Illustration: Drill with 71mm hole saw cutting into wall at marked points.]

4. Step 4: Clear Opening

   Remove any excess material between the drilled holes to create a clean opening.

   [Illustration: Tool removing material between drilled holes.]

5. Step 5: Prepare Back Box

   Remove the back box cover and drill out the required conduit holes as needed.

   [Illustration: Back box with cover removed, showing drill bit enlarging side holes.]

6. Step 6: Fit Render Trim (Optional)

   If a render trim is being used, fit it onto the back box.

   [Illustration: Render trim being placed onto back box.]

7. Step 7: Secure Back Box

   Plasterboard: Insert the back box into the prepared hole and secure it using screws.

   Brick wall: Secure the back box within the hole using adhesive, or by nailing the trim down.

   [Illustration: Back box being screwed into plasterboard. Back box secured with adhesive or nails in brick wall.]

8. Step 8: Replace Cover

   Reattach the back box cover.

   [Illustration: Back box cover being placed back onto installed box.]

9. Step 9: Finish Wall

   Complete the wall finishing as necessary, ensuring a neat surface around the installed box.

   [Illustration: Trowel and plaster used to finish wall surface.]

10. Step 10: Access Internal Components

    Remove the back box cover and any central screws to access the internal components.

    [Illustration: Back box cover removed, showing central screws.]

11. Step 11: Install Divider

    Install the divider into the back box.

    [Illustration: Divider piece slotted into back box.]

12. Step 12: Make Electrical Connections

    Make the necessary electrical connections to wire the modules.

    [Illustration: Simple wiring diagram showing connections to modules.]

13. Step 13: Screw in Modules

    Secure the modules in place by screwing them into the back box.

    [Illustration: Modules being screwed into back box.]

14. Step 14: Clip on Front Plate

    Clip the front plate into position over the installed modules.

    [Illustration: Front plate being clipped onto installed back box.]

Removal Instructions

For toggle switches: Use the remover tool to unscrew the toggle ring.

For general front plate removal: Insert the lip of the remover tool under the edge of the front plate and gently lever it off.

[Illustration: Remover tool unscrewing toggle switch ring. Remover tool levering off front plate.]