Codelock 420/425 Installation

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Codelock 420/425 installation instructions

The 420/425 keyless coded door lock is a complete locking unit with all the parts necessary for a new installation, or the total replacement of an existing lock.

IMPORTANT The mortice lock provided (fig. 1) has features which are not found in most other locks and so it is recommended that you familiarise yourself with them as follows:

A. When necessary the hand of the latchbolt can be changed by removing the three screws holding the faceplate to the lockcase, loosen the screw holding the latchbolt in place, reverse the latchbolt, and tighten the screw back up, ensuring that the latchbolt is central.

B. Put the key in the cylinder and insert it centrally into the lockcase. Fix it in position with the long bolt through the faceplate. It should now be possible to project and retract the deadbolt with the key, and also to retract the latchbolt.

C. The square latchbolt follower is in two parts: the inside ‘panic function’ follower will retract the latchbolt and also the deadbolt when it is projected. The effect of this is to ensure that it is not possible to accidentally lock someone in a room because the deadbolt is projected. The outside follower will always retract the latchbolt whenever the lever handle is depressed after a correct code is entered, but it will not retract the deadbolt.The hand of the ‘panic function’ is determined as follows: the grub screws on the split follower facing the code side must be removed. This prevents the outside handle retracting the deadbolt.

NEVER remove grub screws from both sides at the same time. All door locks should be installed with a degree of precision to ensure that all components are horizontally and vertically accurate in relation to each other, and in relation to the door. Do not install the lock where it will involve cutting into a joint between the door stile and a mid-rail. 

Step 1

Lightly mark a height line on the edge and both faces of the door, and the door jamb, to indicate the top of the lock when fitted. Mark a line down the centre of the door edge, extending above the height line and 300mm below it.

Step 2

Hold the template against the edge of the door with the top in line with the height line, and with the arrows in line with the ‘Centre of Door Edge’ line. Mark the positions of the fixing screws, and the holes to be drilled for the mortice.

Step 3

Apply tape to the 16mm drill bit at 90mm from the tip to act as a depth guide when drilling the mortice holes. Ensure the drill is level and parallel to the door face and drill the holes as indicated on the template. Remove the remaining wood with a chisel to leave a clean mortice hole which accepts the lockcase without forcing.  With the lock in the mortice make sure that the forend is parallel with the door edge and mark the outline of the forend plate. Cut the outline with a Stanley knife to avoid splitting out when chiselling. Chisel a rebate sufficient to accept the forend flush with the surface.

Step 4

Fold the template accurately along the dotted line and tape it to the door face with the top in line with the height line, and the fold on the door edge.Mark the centres of all the holes to be drilled. Remove the template and repeat the procedure on the other face of the door.

Step 5

Drill the holes from both sides of the door to improve accuracy and to avoid splintering out the door face.

Step 6

Install the lockcase in the door.

Step 7

Cut two of the black socket head bolts to the required length for your door.
Approximate overall length should be door thickness plus 25mm to allow about 10mm of threaded bolt to enter the outside plate.

Step 8

Take the BLUE or RED tipped spindle and fit to the code side according to the hand of your door (see diagram).

Fit the butterfly spindle to the inside, non-code side.

Step 9

Check that the lever handles are correctly fitted for the hand of door. To change the hand of a lever handle, loosen the grub screw with the small Allen key, reverse the lever handle and fully tighten the grub screw.

Step 10

Apply the front and back plates, with the neoprene seals in position, against the door,over the protruding ends of the spindle.

Step 11

Fix the two plates together using the socket head bolts, starting with the top fixing. Ensure that the two plates are truly vertical and then tighten the bolts using the 'T' shaped Allen key. Do not use excessive force.

Step 12

Before closing the door, enter the code and ensure that the latchbolt will retract when the lever handle is depressed. Now check the operation of the inside lever handle. If there is any binding of the handles or latch then loosen the bolts slightly and reposition the plates slightly until the correct position is found, and then re-tighten the bolts.

Step 13

Fit the double Euro-profile cylinder and secure it with the long screw through the faceplate. Fit the cylinder escutcheons.

Step 14

Check that the deadbolt will project and retract by key, and that the key will also retract the latchbolt.
Check that the inside lever handle WILL retract the deadbolt simultaneously with the latchbolt.
Check that the outside lever handle WILL NOT retract the deadbolt.

Step 15

Mark a vertical line on the door jamb half the door thickness away from the door stop. This gives the centre line of the strike plate. Align the Strike Plate Template with the height line, with the arrow heads aligned with the centre line.
Mark the fixing holes, and draw around the apertures for the latchbolt and the deadbolt. Chisel out the latch aperture to 12mm deep, and the deadbolt aperture to 22mm deep.

Fix the strike plate with the top screw only and gently close the door. Ensure that the latchbolt enters its aperture easily and holds the door without too much 'play'.
When satisfied, draw around the final position of the strike plate, remove it, and cut a rebate to allow it to fit flush to the surface. Re-fix the strike with both screws.

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• If help is needed before, during or after installation of your keyless coded door lock, call our freephone helpline 0800 393 405.