Mode 5
Mode 6
OPTIONAL FEATURES
-
A RANGE OF MULTIPLEX OR ELECTRO-MECHANICAL CONTROL
PANELS
-
REMOTE, ELECTRICAL BLADE STATUS INDICATION PANELS
-
HEVAC INSTALLATION FRAME/DRY WALL FIXING FRAME
-
ACCESS PANEL
Description
Mode 5 is a fully automatic type of smoke and
fire damper and operates on the basis of fail
safe closure with automatic reset. It has been
designed to close in smoke and fire conditions
upon signal from a fire detection system or in
the event of an electro thermal fusible link
separating at a pre-determined temperature
(72°C standard).
Operation
Mode 5 is fitted with a square drive spring return
motor which will hold the damper open for as
long as the supply voltage is available.
Interruption of this supply will cause controlled
damper closure by way of the motors spring
return operation. In addition however, the
damper is also fitted with an electro thermal
fusible link which will separate at a pre-
determined temperature (72°C standard) and
close the damper irrespective of motor position.
All Mode 5 units are also fitted with a control
box which is situated on the dampers ductwork
extension and houses the integral PCB, status
indication L.E.D. and test facility. The test key
facility allows local checks to be made on the
damper operation.
The L.E.D., provides the following diagnostic
checks:-
GREEN DISPLAY:- Power supply ON, unit set.
RED DISPLAY:- Power supply ON, but unit in
fail safe mode.
NO DISPLAY:- Power supply failure, unit in fail
safe mode.
The control box also provides an interface for
remote status indication, smoke detectors and
RCP control (see page 11 and 12).
Control Options
A
- 24v DC Power Supply
B
- 240v AC Power Supply
Re-Set Procedure
Provided the fusible link is intact and the remote
or local test facility is not being utilised the
damper will automatically reset after an
interruption of the supply voltage. The motor will
take approximately 80 seconds to fully open the
damper.
The LED indicator and test facility are housed in
a control panel mounted on the ductwork
connection sleeve. Fully assembled prior to
despatch they require only the external electrical
wiring connections to be made on site.
Mode 6 performs in exactly the same manner as
the Mode 5 except that the operation is reversed
and the unit is fail safe open. The motor sets the
unit in the closed position and the unit will only
open in the event of a signal from the fire
detection system, separation of the thermal
fusible link or operation of the key test facility.
Ordering procedure: Back cover.
4
