mcr S-THERM smoke exhaust vents: C, E, NG-A. OPERATION AND MAINTENANCE MANUAL
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After installing the vent in its final location and before using it, the lock must be released from its
shipping protection. To do this, first remove the lock housing by loosening the bolts holding the housing
on. Releasing the lock consists in cutting the tie strap and removing it. The cutting of the tie strap is
shown in Fig. 66. Once this is done, put the lock housing back on and tighten the bolts that secure the
housing.
Fig. 65 Cutting the tie strap to release the lock.
If the lock is equipped with an electromagnet, it must also be connected
and prepared for operation. Observe the following points:
1)
After connecting the electromagnet to the power wires, arrange them in such a way that there
is no collision of these wires with moving parts of the lock - the full range of movement of the
mechanisms must be taken into account.
2)
For electromagnets triggered by power failure - first turn the power on and only then close the
jumper; the method of closing is shown in Fig. 67 - the jumper is item "1”.
3)
For electromagnets triggered by an electric impulse (current flow), after step 1 close the
jumper as shown in Fig. 67.
4)
Close the vent leaf. Make sure that the lock "nut" (round piece) is open as shown in Fig. 68a -
the “nut” is item 2. When the vent is closed, there should be a characteristic “engaging" sound
of the lock. If the locking process was done correctly, the lock "nut" should be closed as in Fig.
68b.
