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Electromagnetic timed door hold (which operates independently of the existing fire alarm system), with a master unit for 240V in and 24V out, with electromagnet and plate which works in conjunction with existing door closer. The units are available for one door or pairs of doors. Designed to hold open a single or pair of doors for up to 57 seconds, cutting down on draughts and loss of energy, as well as preventing buckling and distortion to each door — a common problem with permanent door hold systems. The 24V electromagnet releases the door to be shut in the normal way. Ideal for hospitals, residential homes. offices, computer suites. hotels and warehouses.
Can also supply operation for the blind. Holding the door open until the person passes through the door. There is no wiring to the existing fire alarm system as agreed by the Fire Brigade as the time setting is less than one minute. When the door/s are fully opened the armature comes into contact with the Envirohold unit. When this happens the electromagnet is automatically energised and the door is held open. When the timing circuit ‘times out’, in 57 seconds.
- Works in conjunction with existing door closer, holding single doors or pairs of doors open magnetically- Prevents buckling and distortion to the door – a common problem with permanent door holding systems
- Ideal for hospitals, residential homes, offices, computer suites, hotels and warehouses
- Can also be configured to hold doors open until someone has passed through them – ideal for the blind or visually impaired
FIRE TEST PERFORMANCE
Both the MH24 (24 Volt) and the MH240 (240 Volt) units are mounted in a powder coated steel casing with brushed stainless steel front covers. The armature plate is mounted on a plastic back plate with a flexible ring. The armature plates are made of a special metal and designed to release easily when power is removed. NO magnet sticking. Both MH24 and MH240 can be wired to any type of fire alarm system with the correct voltage. MH24 can also be used with the Envirohold Timed Door Hold System, which does not require wiring to a fire alarm system, for holding doors open for up to 57 seconds. Should the fire alarm system be unable to take anymore load, Envirograf® can supply a 240 volt to 24 volt control unit to control up to 2 magnets. Where doors are far away from a wall, Envirograf® manufacture a metal plate to go by the architrave to mount the magnet box onto; finished in white or brown.
Please use the links below to download relevant information as PDF documents:
|MHK1||Kit for one door consisting of 1 control unit, 1 electromagnet ,and 1 armature plate|
|MHK2||Kit for two doors consisting of 1 control unit, 2 electromagnets, and 2 armature plates|
Where magnets are only required to wire into an existing or new fire alarm system to hold the door permanently open. Envirograf® Magnet and Armature Plates can be supplied separately.
|MH024||24V Magnet & Armature|
|MH240||240V Magnet & Armature|
Where sufficient supply is not available on the existing Fire Alarm System or no Smoke detector circuits,
We can supply a Control Unit for this. 240V in 24V out with terminals to wire to the magnets.
Terminals to wire to 24V MH24 Magnet and Armature, and a normally open or closed circuit to wire to existing Fire Alarm System.
|ES/MDHB||Magnetic Door Holder Bracket for fixing the holder (white or brown)|
NEW RETRO-FIT TIME DELAY UNIT FOR HOLDING DOORS OPEN FOR UP TO 60 MINUTES THEN CLOSE
For use where an existing magnetic timed door hold is already installed and some doors need to be shut after a period of time. The retro fit system can be installed on a single or double pair of doors. A compact relay is fitted to the door and a time controller for a length of time if you want the door open. However, if the fire alarm system rings this would immediately close all doors. This is a safe proof system.
|MDH91/S||Single Door Set without Armature|
|MDH91/D||Double Door Set without Armature|