Automatic door hold open devices

Dorgard Acoustic is a device designed to hold open a fire or smoke door safely, automatically releasing upon the sound of a fire or smoke alarm. It can be used to hold the door in any position between open or closed.  Dorgard Acoustic is a more cost effective means of legally holding open fire and smoke doors, compared to a fully wired electromagnetic door hold open devices. It eliminated the need for expensive hard wiring of the door hold open device.

"No wires, no worries!"

 

Key Features and Benefits

• Installs in under 5 minutes
• Wire-free solution
• Automatically releases when fire or smoke alarm sounds
• Proven in thousands of buildings across Europe
• Smart unobtrusive design in several colours
• Easy foot operated release and adjustment
• Automatic night time release option
• Improves access for wheelchair users
• Fire tested for up to 2 hours for use on most proprietary fire doors

Operation

When Dorgard Acoustic is holding a fire door open it listens for the continuous sound of a fire or smoke alarm. It needs to hear the alarm signal that exceeds 65dB (sound level) for about 10-15 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.  Dorgard Acoustic has shown to operate with many of the different evacuation signals, including EWIS.

TECHNICAL OVERVIEW

Installation & Commissioning

Dorgard should be installed by fully trained personnel.  Prior to installation, Dorgard shall be tested to the alarm, to show it operates as intended. If the alarm does not generate sound exceeding 65dB as required, consider the use of Dorgard X.

To hold the door open, open the door to the required position and press the knob down using your foot. Adjust the pressure according to the weight of the door.

Certification

When installed on fire or smoke doors, Dorgard must be certified as part of the doorset.

To release Dorgard, lightly kick the knob towards the door or push the door in the direction of opening

Maintenance

Dorgard should be maintained as part of the usual fire and smoke door inspection and maintenance frequencies typical for your building. Dorgard uses batteries which should be changed regularly.

Approvals

• Fire tested for up to 2 hours to AS1530.4 in accordance with AS/NZS1905.1 on most proprietary fire doors. Check with the fire door manufacturer for details.
• Complies with BCA requirements for automatic doors.
• Complies with EN 1155 (1997) Building hardware- Electrically powered hold-open devices for swing doors-Requirements and test methods.

Technical Overview

Dimensions and weight

• Overall height: 205mm
• Main casing height: 150mm
• Width: 195mm
• Depth: 45mm
• Packed kit weight: 950g
• Product only (including batteries): 700g

Specifications

•  Power: 2 x 1.5v C size alkaline batteries
• (do not use rechargeable batteries)
• Expected battery life: 12 months
• Trigger: 2.4KHz continuous sound above 65 decibels(A)

Approvals and standards

• BCA compliant for automatic fire and smoke doors.
• AS1905.1 compliant for fire doors.
• 2 hour fire test to AS1530-4
• BS EN 1155: 1997 building hardware. Electrically powered hold-open devices for swing doors. (Manufacturer's classification number 357113.)
• BS EN 50081-1: 1992 electro-magnetic compatibility. Generic emission standard. Residential, commercial and light industry.
• BS EN 50082-1: 1997 electro-magnetic compatibility. Generic immunity standard. Residential, commercial and light industry.

Patents

• Patent numbers: 5525963 & 0635092

For more information please contact www.trafalgarfire.com.au.