Installation Manual
SentriLock NXT-BLE Installation Manual – 2019 v3
Page 5 of 9
1.6
a)
Carefully remove the metal Spacer Plate. Use a flat blade
screwdriver if necessary.
b)
Set aside for re-assembly.
2 Marking and Drilling Holes
(or metal substrate installation please refer to page 3 - Drilling the Mounting Holes into Steel Substrate)
Step
Instructions
Picture
2.1
Using the supplied drill template,
mark the 4 mounting hole
centers to be drilled onto the surface. (The drill hole
positions in the slots must be at the extreme top end of the
slots, centered some 84mm from the bottom holes.)
WARNING
This is important, otherwise installing the screws will foul the
casing.
See SentriLock
Drawing
SL30174
(Page 9)
2.2
Centre punch all four drill points to stop the drill wandering
during the initial drilling.
WARNINGS
Ensure there are no electrical or data cables, gas or water
pipes or other utilities behind the surface before drilling.
Do not drill the holes through the Lockbox.
Do not breathe in the dust created by drilling – it contains
silica which can cause lung disease. Wear respiratory
protection.
a)
Drill the holes with an 10mm masonry drill bit to 90 mm
depth. The quality of the drilled hole is the critical factor.
Ensure the holes are drilled perpendicular to the fixing
plane and that they are sufficiently deep.
a.
If using the 100mm screws, drill the holes to an
110mm depth
b)
Use the small dustpan to catch the dust from the drilling
or tape a plastic back to the wall underneath where the
holes will be drilled to catch the brick dust.
c)
Sweep brick dust into a polythene bag for use during
deinstallation when filling holes and coloring filler.
