LPCB Certified Fire Shutter

Motor

Geared electric in line motor unit with limit switch override. Unit capable of brake release via fusible link or solenoid to provide safe controlled rate of door closure under gravity.

Fire resistance

30 minute, 60 minute, 120 minute and 240 minute

ENGINEERING

Size

Door Dimensions: max 7000 x 7000 mm. All doors are made to measure to specific requirements. Larger sizes available as special design.

Curtain

2 hour (120 mins) and 4 hour (240 mins): A minimum of 20g for doors up to 5m or 25 square meters and thereafter 18g. 1/2 hour (30 mins) and 1 hour (60 mins): A minimum of 20g discretional above 5m or 25 square meters.

Safety

As required by the machinery directive and BSEN standards enforced by the HSE, a safety brake is fitted to the roller to prevent the shutter from falling in the event of drive failure. Presence sensing safety sensors and audio-visual alarms are required to protect pedestrians.

When the doorway is to be used by pedestrians, the fire shutter must have safety systems fitted to BSEN 12453. We recommend as a minimum, an AV warning supported by a light curtain, or multiple photocells controlled through a battery backed-up control panel. Should a pedestrian be in the line of the door when the fire shutter closes, the door will stop and only continue when the obstruction is clear. The door will then continue to close unless the beam is interrupted again.

Note: Safety edge devices are not permitted due to the flammable rubber content. Other presence sensing devices should be used to protect the pedestrian area. Safety brakes are fitted to all fire roller shutters to prevent uncontrolled closure in the event of mechanical failure.

Brackets

These heavy brackets designed to support the casing and roller in a fire situation are required over 60 minute fire resistance dependant on the size

Operation

Power supply: Single phase or three phase as specified on the quotation.

Normal operation: Hold to run press buttons or key switch.

For normal operation, Hart fire shutters are press button, or for security purposes and prevention of unauthorised use, key switch operation. For safety reasons, the location of the push button or key switch must be positioned in an area where the operator will have a full view of the entire door. During operation, ‘Constant pressure must be maintained on the button by the operator’ until the door is fully closed. Additional safety must be provided for pedestrians if this is not the case.

Fire activation:

Fire shutters activated by a sacrificial fusible link will operate the door independently when the heat around the link reaches approximately 72°C. The fire roller shutter motor comes complete with a 24V dc energised to hold actuator. When the actuator is de-energised, it will release the drive brake, and the door will close by controlled descent in a safe and controlled manner (fail-safe). As an option, the door is supplied with a fire control panel which gives a volt-free signal to allow closure. The fire control panel holds the shutter open during a power failure, for up to 60 minutes, via internal batteries and comes with audio/visual warnings. During installation and commissioning the actuator must be energised, to prevent the motor from turning and the door from closing. The fire shutter is reset by re-energising the actuator and giving an open command. A combined fusible-link and actuator option are also available, including upgraded sophistication to suit client needs.

Hart fire shutters can be connected through local or building fire and smoke control systems and supported by client risk assessment to ensure compliance to BSEN 12453.Manual override: By hand chain through motor (very slow and not suitable for frequent operation)

PERFORMANCE

Speed

Standard opening Speed: 0.15 m/s
Standard Closing Speed: 0.15 m/s