OPERATION AND MAINTENANCE MANUAL mcr LAM vents
Page 11 of 20
Figure 11. COMEPI AP3T38W20
The limit switches fitted on mcr LAM louvered vents are factory pre-set. These limit
switches might get misadjusted during transport and then the adjustment procedure described
in the manual Connection and Adjustment of COMEPI limit switches in mcr LAM units should
be followed.
9
Control
The control systems to open and close the vent blades are an indispensable part of mcr
LAM louvered vents. Smoke exhaust control or smoke exhaust and ventilation control systems
can be employed in this function. Two type of smoke exhaust control systems are available,
each comprising a different set of components:
• pneumatic,
• electric.
9.1
Pneumatic control
Depending on the system configuration it may be necessary to connect additional
pneumatic lines to the vent (e.g. copper/steel tube connecting to the alarm box including
bottles).
Threaded connections of pipe unions with valves, actuators, etc. area sealed by applying
appropriate chemical agents, such as Loctite 243 (recommended) or PTFE thread seal tape.
To seal the connection with Loctite 243 apply a few (2-3) drops on the tread surface. After the
connection has been tightened, the applied Loctite 243 will set, thus protecting the connection
from uncontrolled loosening (important for connections of actuators). It is impossible to loosen
a union protected in this way other than by means of hand tools.
Figure 12. Method of installation of elastic air tubes
Sleeve (for plastic
tubes)
Body
Tube
Compression ring
Nut
