CL255 Mortise Latch

Mechanical light duty, push button motise latch with hexagonal handle.

Select your product

Price

Description
Specification
How to fit
How to program
Spares

The CL255 is a light duty mortise latch with dual backplate

The latch is spring loaded and will lock automatically when the door is closed. The latch bolt has a deadlocking plunger feature to prevent unlawful shimming of the latch. The lock has a slide button which can be used to hold open the latchbolt for free entry without operating the code (when the lock is not required to be operational).Function can be disabled on installation requiring code to be entered every time to open door.

Internal doors
Mechanical Codelock
Light duty mortise latch with dual backplate
Hexagonal bevelled handle and lock case
Available in Stainless Steel and Polished Brass
Key override option available – CL255KEY – Stainless steel finish only
Use in offices / schools / warehouses / hospitals / care homes / nurseries / hotels / leisure facilities / the home

Available in two PVD Finishes
Stainless Steel, Polished Brass

The CL255 locks are supplied with a random code commencing with the ‘C’ clear button. To change the code after fitting, the lock must first be removed from the door. The code is non sequential, that is the code can be entered in any order e.g. 1234 can be 4321 or 1342 or whatever is the most convenient sequence. With the 13 buttons a total of 8,191 different codes are available, any of which may be entered in any order.

Item	Details
Body material	Zinc alloy
Door material	Suitable for wooden doors
Door thickness	35mm - 65mm (1 3/8" - 2 1/2")
Latches - Option 1	50mm (2") backset latch requiring 25 x 72mm (1" x2 7/8") hole
Latches - Option 2	60mm (2 3/8") backset latch requiring 25 x 82mm (1" x 3 1/4") hole (supplied by default)
Latches - Option 3	70mm (2 3/4") backset latch requiring 25 x 92 mm (1"x 3 5/16") hole
Non handed	Lock will fit doors hung on the left or right
Spindle type	Flat spring loaded spindle

Print this page

Downloads:

Cl255 installation template

Number relating to picture	Item	CL255
1	Front plate	*
2	Back plate (hold open models have a sliding snib)	*
3	Neoprene seals x 2	*
4	Spring loaded spindle	*
5	Latch (60mm backset)	*
6	Strike plate	*
7	Wood screws x 4 - use with latch and strike plate	*
8	Latch support post	*
9	Tweezers	*
10	Fixing bolts x 3 (1 x spare)	*
11	Code tumblers (2 x spare)	*
12	Code card	*

Tools Required

Power Drill
25mm, 15mm & 8m drill bits
Philips screwdriver
Hammer / mallet
Chisel 25mm
Stanley knife
Adhesive tape, pencil, bradawl, tape measure

Special Notes
You are advised to familiarise yourself with the instructions before starting work.

The hold open model is equipped with a snib on the backplate. This enables the latchbolt to be held open when required.
Before commencing installation check that all parts are working correctly – press the code according to the code card and then the knob should turn and return easily under spring pressure. If you have a key override lock try the keys to ensure that they turn in the knob handle.
If you intend to change the code, you should do it, if it is convenient, before installing the lock – see the code change instructions.
Make sure that the lever handle of the backplate moves freely. If your lock is a hold open model then check that the snib will engage and hold the handle in the latch open position.
Check that the latch bolt moves freely by pressing at the end and also by turning the flat spindle in the latch cam

255 parts drawing

1. Check the hand of your door

Your door is right handed if, viewed from outside, the hinges are on the right.

Codelocks CL255 CL255 KEY Lock Installation Diagram 1

2. Apply the template

Crease the template along the door edge line and tape it to the door.
Mark the 13mm holes, and the 3 x 8mm holes. Mark the centre line of latch in the middle of the door edge. Now apply the template to the other side of the door, aligning it with your first mark in the middle of the door edge. Mark the 4 holes again.
Keeping the drill level and square to the door, drill the holes from both sides to avoid splintering out the door face.

Positioning and fixing the deadbolt

Mark a central point on the centre line of latch on the door edge.
Mark the depth of 85mm on the drill bit with tape to act as a visible depth limit. Drill a 25mm hole, 85mm deep, keeping the drill level and square to the door.
Insert the latch into the hole, and with the edges parallel to the door, draw around the face plate.
Remove the latch. Score the pencil line with a Stanley knife to avoid splintering prior to chiselling. Chisel a 3mm rebate to fit the latch face flush to the door edge.
Fix the latch with the wood screws, with the bevel towards the door frame.

Codelocks CL255 CL255 KEY Lock Installation Diagram 2

Codelocks CL255 CL255 KEY Lock Installation Diagram 3

3. Latch support post

Fit the latch support post in the back of the lockcase in hole A for a right hand door, or B for a left hand door.

4. Disable Hold Open Function

If required the hold open feature can be disabled as follows: Remove fixing plate by removing the four fixing screws and blue handing screw.

Lift out the snib block.
Flip over and reseat. Refit the fixing plate.

Do not fit the blue handing screw.

5. Positioning the spindle

The spring loaded spindle will fit oors between 35mm and 65mm thick. For doors less than 50mm thick break off the 15mm section at the end of the spindle. For door more than 65mm thick, ring the helpline for advice. The spring keeps the spindle firmly engaged in the outside handle when the lock is assembled on the door.
Insert the spindle, with the spring on the code side, through the 13mm hole in the door, and make sure that it engages the latch correctly for the hand of the door (see insert diagram).

Codelocks CL250 Lock Installation Diagram

6. Fixing the lock

Cut the fixing bolt to suit the door thickness, allowing at least one threaded section to screw into the lockcase.
Hold the lock case and the backplate, with the seals, onto the door with the spindle in position.
Using the fixing bolts screw everything together through the top and bottom holes of the backplate. Before final tightening make sure that the lock is vertical, and test the mechanism to ensure that it is all moving easily. Do not close the door until you are sure that the code works.
Do not over-tighten the fixing bolts as this may cause distortion and lead to poor operation.

Codelocks CL255 CL255 KEY Lock Installation Diagram

7. Fixing the strike plate

Ensure that there are no obstructions to prevent the door closing properly into its frame, such as litter trapped in the hinge side.
Position the strike plate on the door frame so that it lines up with the flat of the latchbolt, not the plunger.
Draw around the aperture of the strike plate. Chisel out the aperture 15mm deep to receive the latchbolt. Fix the strike plate to the surface of the frame with one screw only. Close the door and ensure that the latch bolt enters the aperture easily, and is held without too much play. When satisfied, draw around the final position of the strike plate, remove it and cut a 1mm rebate to enable it to fit flush. Re-fix the strike plate with both screws.

Codelocks CL255 CL255 KEY Lock Installation Diagram

N.B. The plunger beside the latchbolt deadlocks the latchbolt and protects it against manipulation. It must not enter the strike plate aperture when the door is closed.

Codelocks CL255 CL255 KEY Lock Installation Diagram

Codelocks CL250 Installation Diagram 7c

Print this page

The CL255 code chamber consist of 13 buttons from which the code is selected, and a ‘C’ button which is used to re-set the chamber after an incorrect entry, and which must always be used as the first digit of a code. Buttons may only be used once in a code. For example, 1212 is not possible.

A CL255 code, or combination, can be entered in any order or sequence; e.g. 1234 can be 4321 or 1342 or whatever sequence is most convenient to remember. With 13 buttons, a total of 8,191 different codes are available, any of which can be entered in any sequence.

Most people will set a code in the range of 4 to 7 digits, and the total number of codes in this range is 5,434.

The lock is factory set with a randomly selected 6 digit code starting with the C button. The code is not recorded by the factory. The code can be changed as often as required to any other 6 digit code. Every new code must start with the C button. Using the spare tumblers, one red and one blue, the code length can be changed to 5 or 7 digits. Shorter codes are possible, but 1 or 2 digit codes are not recommended.

Code Change Instructions

1. Take your CL255 lock off the door by unscrewing the 2 bolts in the backplate.

2. Press the C button to reset the chamber and place the lock case on a flat surface with the buttons down.

3. Remove the 2 red screws and carefully lift off the code chamber plate. Check that all 14 springs are held in place on the plate.

4. Note that the red tipped code tumblers correspond in position to the existing code. The blue tipped non-code tumblers fill the other positions. The C tumbler is not coloured.

5. Hold the lock in your hand and depress the C button. Keeping the C button depressed use tweezers to re-position the tumblers to correspond with your new code. The square notches of ALL tumblers MUST face outwards, with the coloured tips ON TOP: see diagram below. Do not force the tumblers in.

N.B. Holding the C button depressed whilst removing or replacing the tumblers is essential to avoid damaging the internal mechanism. Do not attempt to reposition the C tumbler.

6. Replace the code chamber plate carefully with the 2 red screws.

7. Check the operation of the new code, and make a written note of it before re-installing the lock.

8. Insert the spindle, with the spring on the code side. On latchbolt locks, the spindle must engage the latch as diagram below.

Maintenance

No maintenance of the working parts is necessary. Do not oil. To maintain the finish the lock should be cleaned regularly with a soft cloth. A silicone spray or similar should be used to provide a protective film against grit and grime.