mcr-PROLIGHT
VENTS
,
TYPE
:
C,
E,
NG-A
O
PERATION AND MAINTENANCE MANUAL
Page 17 of 31
Fig. 22 Actuator - hook console joint
8. CONTROL
The functioning of smoke exhaust and smoke & ventilation vents is based on devices used
for controlling their opening and shutting. A set of such devices forms together a system for
smoke exhaust control or smoke exhaust and ventilation control. Depending on the
equipment used in it, the smoke exhausting control system may be offered in the following
variants:
• pneumatic system,
• electrical system,
• mechanical system.
Depending on the control method, mcr-PROLIGHT vents feature pneumatic actuators with
thermal triggers or electrical actuators, and - additionally - pneumatic and electrical
actuators for controlling natural ventilation.
In the event of failure of the control that prevents the vent shutting, contact the service
department immediately (see point 12).
If the vent must be shut immediately, proceed with the following before the service
technicians arrive: disconnect the immobilized actuator from the leaf (e.g. by disconnecting
the eye bolt from the hook console, or undoing the eye bolt from the actuator, or
disconnecting the E actuator from the fixing console), then shut the leaf and protect it from
opening.
8.1. Pneumatic control
Depending on the system's configuration, it may be necessary to connect additional
pneumatic piping to the vent (e.g. copper/steel tube from the alarm box containing
cartridges).
Threaded joints of pipe unions with valves, actuators, etc. must be sealed using
appropriate chemical agents, e.g. Loctite 243 (recommended) or Teflon tape, by winding it
around the thread. Apply several (2-3) drops of Loctite 243 per sealed thread. After
screwing the threaded joint together, Loctite 243 cures and seals the joint, securing it from
uncontrolled loosening (which is important for actuator connections). The loosening of a
pipe joint secured in such way is possible only using hand tools.
Vents with pneumatic control are equipped with cords limiting the vent leaf movement. The
cords are to be released before operating the vent for the first time (they should sag
freely).