Control Options
The actuators are supplied with flying leads which
With over 15 years' experience Wozair have supplied
numerous Fire Damper control systems to suit vari-
can either be terminated in a junction box fitted to
ous applications. Our experience enables us to
the damper or installed on site.
design control systems to meet particular require-
Manual Latch
ments. The following `standard' systems are
detailed as a guide for customers and specifiers and
The damper is manually latched in the open posi-
can be applied to any of the fire dampers in the
tion, with the blades held open against return
range.
springs fitted to the non drive end of each shaft. De-
Client specific controls can be supplied if required.
latching and hence closing of the damper is initiated
Depending on complexity and customer's require-
by either rupture of the frangible bulb, operation of a
ments Fire Damper controls will either be supplied
pneumatic cylinder by inert gas or interruption of
fitted inside a removable enclosure, or fitted to a
electrical power to a holding electro-magnet.
removable plate mounted on the drive side of the
Local visual indication of damper status is provided
damper.
by a pointer. If required remote damper status is pro-
vided by limit switches cabled back to a local junc-
Pneumatic Actuation
tion box, which shall either be for safe or hazardous
area depending on the application.
An air to open, spring return to close pneumatic
actuator is fitted, with numerous options for valves
Damper closing times for manual latch dampers are
and electrical items.
less than 3 seconds.
Some options are detailed below:-
Examples of ancillary equipment options:-
Anodised or painted aluminium
Actuators -
Position -
Suitable for Safe or Hazardous areas
Composite
Indictaion
Limit switches
Painted steel
Proximity sensors
Stainless steel
Junction -
For terminating solenoid valves and
Brass or stainless steel
Valves & -
Boxes
position switches suitable for Safe
Solenoid valves for Safe or
Pipe-work
or Hazardous areas manufactured
Hazardous areas
from GRP, ABS, cast iron or stain-
Frangible bulb operated valve
less steel
Manual test valve
Pilot operated valve
Insulation -
Dampers can be provided with the
Quick exhaust valve
insulation between the controls
Non return valve
enclosure and the casing pre-fitted.
(for use with Reservoir/Black Start)
This eliminates the task of applying
insulation between the casing and
Electric Actuation
controls enclosure on site, and also
A power open spring return electric actuator is fitted.
ensures that the controls are fully
For safe area applications the actuator will normally
accessible for maintenance after
be a Belimo BF type, and for hazardous areas shall
insulation. The other three sides of
be Schischek type. If the damper is specified with its
the damper shall be insulated in-situ
own frangible trigger, for safe areas the Belimo actu-
by others.
ator will be fitted with a Belimo thermal sensor. For
hazardous areas a rated switch will be operated
Fireman's -
Fire damper control panels can be
upon rupture of the frangible bulb or azeotropic sensor.
Control
supplied where there is a need to
Panels
control a group or "zone" of
Damper operating times for electric actuation are as
dampers from a common point.
follows:
Such panels can be fitted with con-
trol valves and instrumentation to
Standard Belimo - open 180s, close 16s
suit specific requirements. As stan-
Special Safe Area - open 180s, close <3s
dard the panel is manufactured in
Schischek open 180s, close 16s, 3s or 1s
stainless steel 316 and designed in
depending on application
accordance with IP55.
Both Belimo and Schischek actuators are supplied
Auxiliar y -
Cable glands suitable for safe or haz-
with integral auxiliary switches for remote indication
ardous areas. Stainless steel tag
of damper status.
plates for electrical items and valves.