Dorgard DG1328-A01 Manuel D'installation Et Mode D'emploi page 5

Introduction
Dorgard is a device designed to hold open a fire door safely, automatically releasing upon the
sound of a fire alarm. It can be used to hold the door in any position between open or closed.
IMPORTANT:
Dorgard must be used only for the purpose for which it is designed. It is not suitable for
external use. Read this guide and follow the instructions carefully. Keep this guide in a safe
place for future reference.
Prior to installing Dorgard and the Floorplate
Ensure:
1) The fire door is self-closing ie: has a door closer fitted.
2) The fire door closes tightly against the door jamb.
3) Where Dorgard is to be fitted, the door surface is perfectly smooth and flat.
4) You have determined the closing force of the door closer (see note below).
5) The fire alarm system is working correctly, ie: the sounders work when activated.
6) Dorgard forms part of your Fire Risk Assessment.
Fire doors weighing more than 120kg, which have a closing force in excess of 120 Newton
Metres (that's a closing force of about 15kg, 800mm from the hinge) must have the Floorplate
installed in combination with the Dorgard unit. Dorgard can hold a fire door open safely without
the Floorplate installation if the fire door's weight and closing force are less than those
listed above.
When Dorgard is holding a fire door open it listens for the continuous sound of a fire alarm. It
needs to hear a fire alarm that exceeds 65dB (sound level) for longer than 14 seconds. At a
general noise level of 80dB (sound level) Dorgard will release. This facility has been built into the
unit as a safety feature. Should the noise level in your premises exceed 80dB it is unlikely that you
would hear a 65dB alarm.
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