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1. Pre-Installation Assessment
1.1 Mounting Assessment
The first decision regarding installation is whether the SL30DBL will be mortised or surface mounted. Mortise
installation ensures a discrete solution as the lock and strike plate can be embedded into the door leaf and
frame, however in some instances this is not possible. Glass doors for example require surface mounting
which is done with the aid of the SL30DBL housing and dress plate (available separately).
The lock and strike plate can be installed mortised (1), surface mounted (2), or a combination of the two (3).
Regardless of the installation method it is vital that the lock face plate and strike plate are aligned vertically
to each other and that the gap between them does not exceed 6mm (¼ inch) when the door is closed.
When the door is closed, the resting position of the door leaf can be misaligned up to 8mm (5/16 inch) in
either direction and the SL30DBL will pull the door into alignment with ease. This misalignment could be
caused by an automatic door closer not aligning the door or natural distortions in the door assembly.
The SL30DBL can be installed vertically or horizontally but is not designed to be mounted in a floor cavity
firing upwards or in a wet environment. Must be installed vertically for UL10C applications.
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