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Step 1 

Preparing & Drilling Holes in Door  

• 

Fold the template where indicated for the edge of the door

• 

Position template on door edge at desired latch height

• 

Firmly hold template and mark latch height and lock fixing holes at 60mm backset  

(refer template)

• 

Drill a 3mm pilot hole through centre marking for 50mm hole through the door.

• 

Now drill 50mm hole through door face, drilling from both sides to avoid splintering and 

ensuring the drill is held straight and level whilst drilling the hole

• 

Measure Door thickness and mark centre

• 

Drill 28mm latch hole - Ensure the drill is held straight and level whilst drilling the hole

Step 2

Installing latch  

• 

Insert latch into centre of 28mm latch hole and mark around the face 

plate – remove latch

• 

Using a sharp chisel, gently chisel the marked rectangular section to a 

recess of 2mm or until the latch face is flush with door edge

• 

Insert the latch into the hole, ensuring the curve of the latch bolt is 

positioned toward the direction of door closure.

• 

Pre-drill and fasten with wood screws provided (#6 x 19mm) ensuring 

latch is level

Step 5 

Choosing correct screws  

• 

From the two sets provided, choose which set of three mounting screws will be used – depending on the door thickness.  

For doors up to 45mm thick, we recommend the 20mm length screws. For thicker doors, the 45mm screws should be used.

Installation Instructions

 

Delf DDL120

DELF ARCHITECTURAL 

 

|  

ABN 71 621 592 907

1300 362 625

  |  E 

sales@delfarchitectural.com.au 

 

www.delfarchitectural.com.au

PLEASE RECYCLE  

THESE INSTRUCTIONS

PTO

Step 4

Preparing Inside Escutcheon

• 

Remove two black screws from the bottom of the 

inside escutcheon, to 

free the mounting plate 

and gasket. Remove the 

battery cover by gently 

siding it up and away from 

the escutcheon body. 

Keep cover and two black 

screws handy.

Step 3 

Lever Orientation

• 

Hold Exterior Furniture on outside door face and 

check that lever orientation is correct. If lever 

orientation needs to be changed:

• 

Using Allen Key tool provided, unscrew Allen key 

screw on the hub of both inside and outside lever and 

remove lever, then rotate to correct orientation, and 

re-tighten Allen Key screw.

mounting screws

TEMPLAT

E

Delf DDL120 v04.indd   1

9/07/2020   10:17:28 AM

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