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5.
Pre-Installation Assessment
5.1
Mounting Assessment
The first decision regarding installation is whether the YD30D will be morticed or surface mounted.
Mortice 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 YD30D housing and dress plate (available
separately).
The lock and strike plate can be installed morticed (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 (1/4 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 YD30D 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 YD30D can be installed vertically or horizontally but is not designed to be mounted in a floor
cavity firing upwards or in a wet environment.
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