Briton 533 Fire Door Retainer
When used in conjunction with a suitable fire door closer and fire alarm system, the Briton door holder allows fire doors to be safely held open during normal operation.
In the event of a fire or smoke detection, the unit is automatically deactivated. The fire doors will then be closed under the normal action of the door closer. This fire safety measure prevents the spread of fire while providing ease of access for users.
Key Product Features:
- Flush mounting as standard
- Supplied with back box
- Surface mounting with 533.C surface mounting cover (sold separately)
- Built in release/test switch
- 24V DC operating voltage
- Current draw: 43mA
- 200N holding force
- Zero residual holding force
- Maximum cable size stranded: 2.5mm²
- CE Marked
- UKCA Marked
- EN 1634 tested for 120 minute timber fire doors
- Approved to EN 1155
- Suits power size EN 3-6 door closers
- Silver finish
- Ambient temperature range: 0-35°C
- Flush mounting dimensions: 86mm x 86mm x 24mm
Magnetic Door Holder Installation
The Briton 533 electromagnetic hold-open device is suitable for use with overhead door closers and floor springs. It is flush mounting as standard, but can be surface mounted when using the separate surface mounting cover. A floor mounting bracket is available as a special order. Contact our team today if this is required on your project.
To avoid warping forces on the door leaf, it is recommended that the electromagnetic device be fitted in the same horizontal plane as the fire rated door closer. Failure to do so can result in the door leaf twisting. This can prevent the door from closing properly, impacting fire compartmentation and user safety in an emergency.
Fire door retainers should be used to hold open fire doors at a minimum of 65° to comply with EN 1155. At their closest, they should be installed 650mm away from the hinge with a door closer set to power size EN 3. This increases to 1250mm with door closers installed at EN 6.
Select a suitable power supply for this specification commercial door magnet. Include capacity for any other ancillary items. These shouldn’t draw power from the fire alarm system except under alarm conditions.
Easily Maintained Fire Door Holder
The Briton 533 electrically powered hold open wall magnet should be tested weekly. It should release on the sound of your fire alarm, also when the integral test switch is used. It simulates the connection to your fire alarm system without having to activate the alarm or sounder.
There are no separate parts to be serviced, but you should keep the face of the magnet and armature plate clean and free of any debris. This allows the unit to hold the door open with its full magnetic force.
Benefits of the Briton 533 Fire Door Retainer
- Improved accessibility - safely hold fire doors open in care homes, schools, and hospitals for easy access for all users.
- Commercial compliance - a CE marked, compliant way of holding fire doors open in medium and high traffic areas.
- Fire safe - satisfies the requirements of Appendix B, Approved Document B of the Building Regulations.
- Easy to retrofit - fit alongside existing CE marked door closers, connecting the door to your fire alarm system with added hold open function. Flush, surface, or floor mounting options.
