Approvals
Product Conformity awarded by The Loss Prevention Certification Board Limited.
Fire tested (2 hour rating)
Fire Insurers Research and Testing
Organisation.
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Control
Options
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A
choice of two interchangeable and replaceable Release
and Reset Mechanisms is available with either a
Manual Release (Mode 1) or a Manual and 24 Volt D.C.
Electro Magnet Release (Mode 2) being self contained in a compact Cassette
with simple screw attachment direct
to the Damper. For easy withdrawal
without disturbance other than the
removal of the relevant Transfer
Grille.
Removal of the Release and Reset
Mechanism Cassette provides the
further fail-safe feature of Damper
instant closure which cannot be
reversed until the proper
replacement is made.
Control Mode 1
A fusible link actuates the instant
closure of the damper due to an
abnormal rise in temperature.
Control Mode 2
The 24 Volt D.C. Electro Magnet is
normally energised to hold open the
Trans/Shield Damper, which will
instantly close when the electrical
supply is interrupted, either as a
function of a smoke detection
system or due to failure of the
electrical supply and in both events,
prior to the operation of the Fusible
Link on temperature rise or a full fire
condition.
It is recommended that the
continuous electrical supply (83mA
Load) to the 24 Volt D.C. Electro
Magnet is through a battery circuit
and not an automatic change-over
system.
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Indication
of Damper Status
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The Trans/Shield Damper on
closing, automatically disengages a
spring loaded Damper Set and
Status Pin, which is encapsulated
with a distinct red plastic capping,
providing visual indication of
Damper status.
For more information including dimensional data and fitting, please view the
Trans/Shield
Modes 1 & 2 Catalogue Here. |
Specification for Trans/Shield Modes 1 & 2
The design of the Trans/Shield Dampers shall comprise of flanged 18 gauge stainless steel Sliding Seal and Static Damper Plates with horizontal perforations to provide whilst the Seal Plate is in the open position, a free area of not less than that of the matching Transfer Grilles, for the passage and transfer of ventilation air in either direction.
The Damper Sliding Seal Plate shall be retained to the Static Damper Plate with stainless steel shouldered rivets and failsafe to the instant closed position powered by two stainless steel tension springs either by the melting and parting of an attached Fusible Link at a temperature of 72 °C, or the functioning of the relevant Release and Reset Mechanism to maintain integrity and not permit the passage of flame when exposed to the time/temperature curve of BS476 Part: 20 1987 for a period of two hours as tested by the Fire Insurers’ Research & Testing Organisation (Approval TE 6523).
Both Damper Plates together with a removable Release and Reset Mechanism Cassette shall be housed within an 18 gauge stainless steel slimline Damper Casing having integral flanges with prepunched fixing holes. The Cassette shall have screw fixing for ease of attachment to and withdrawal from the Damper Static Plate without disturbance to the Damper and shall contain recessed from view but readily accessible, a Release Lever and Resetting Shaft, both manually operated, and a spring loaded Damper Set and Status Pin which in the exposed position shall provide visual indication of Damper status. The Cassette shall also contain either of two interchangeable and replaceable Release and Reset Mechanisms.
Air transfer fire and smoke dampers shall be type Trans/Shield as manufactured by
Actionair, telephone 01227 276100
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