INSTALLATION INSTRUCTIONS
378- Surface Mounted
Digital Combination Locks
FITTING INSTRUCTIONS
The Digital Combination Lock can be tted to cupboards, cabinets and lockers etc
as a direct replacement for existing cam locks or for the Lowe & Fletcher 3751 Digital
Combination Lock. It can also be easily tted to cupboards and cabinets that do not
have an existing locking device.
SPECIAL NOTES
Before installing the Digital Combination Lock, load the batteries and familiarise
yourself with the operation and programming. Unless manufactured to special order,
the lock is supplied in the “PRIVATE” operating mode. In this mode, the user must
enter a four-digit User Code to open it. The unit will re-lock itself after four seconds.
The lock can be opened at any time using the Master Code. Unless manufactured to
special order, the default Master Code is 11 33 55 77 and the default User Code is
22 44.
These codes are common to all standard locks and it is very important that you
set your own personal Master and User Codes. Your lock is not secure until
you have changed the default Master Code and User Code. Keep a safe record
of your master code as it is not possible to make any programming changes
without it.
Please see programming guide to set your own codes.
INSTALLATION GUIDE - IMPORTANT NOTES
The 3780 lock can be fitted with two or three screws. Always use the screw position
“A” behind the logo button. Use either position “B” or “C” (or both if preferred).
Before drilling fixing holes, please ensure that the position of the Digital Combination
Lock when fitted will allow clearance for selected cam to work.
ENSURE BATTERIES ARE CORRECTLY FITTED BEFORE FIXING LOCK
A) New Installation
Step 1 Place template on door and mark TWO 4.5mm (3/16”) holes (refer to
installation diagrams). Use hole position “A” and either position “B” or “C”. Mark ONE
16mm (5/8”) hole (position “D”).
Step 2 Drill both fixing holes and the 16mm clearance hole.
Step 3 Fit the Digital Combination Lock to the door by passing the spindle through
the 16mm (5/8”) hole.
Step 4 Fit at least two fixing bolts to suit your door thickness.
Step 5 Tighten the upper and lower bolt.
Step 6 Select the cam which suits your door and frame and attach it to the square
shaft at the end of the spindle using a M4 x 8 screw and domed spring washer.
Step 7 Now check the operation of the lock using the factory User Code 22 44.
Step 8 If the lock is functioning correctly, CHANGE THE DEFAULT MASTER CODE
11 33 55 77 and DEFAULT USER CODE 22 44 and program the lock using the
programming and operating instructions enclosed.
B) Replacing existing cam lock with the 378- Digital Combination Lock
Step 1 Remove existing cam lock.
Step 2 Place installation template on door over hole left by cam lock (position “D”)
and mark TWO 4.5mm (3/16”) holes (refer to installation diagrams). Use hole
position “A” and either position “B” or “C”.
Step 3 Drill the two 4.5mm (3/16”) fixing holes.
Step 4 Continue installation from step 3 to 8, above.
C) Replacing existing L&F 3751 Digital Combination Lock with the 378- Digital
Combination Lock
Step 1 Remove existing electronic lock.
Step 2 Place installation template on door over the 16mm (5/8”) hole left by digital
lock in position “D” and the 4.5mm hole in position “A”. Mark ONE additional
4.5mm (3/16”) hole (refer to installation diagrams). Use either position “B” or “C”.
Step 3 Drill the 4.5mm (3/16”) xing hole.
Step 4 Continue installation from step 3 to 8, above.
M4 Screws
2 off length to suit
door thickness
M4 Domed
washer
Cam
M4 x 8mm
screw
HOLES A, B & C DIAMETER 4.5 / 5.0mm
HOLE D DIAMETER 16.0 / 16.5mm
ALWAYS
USE FIXING HOLE A AND
EITHER
FIXING HOLE B
OR
C
Recommended screw fixing torque 0.8Nm
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