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Operation and mechanisms
Operation and mechanisms
CFTH Mechanism with fusible link
The unlocking mechanism CFTH automatically unlatches the damper blade when the temperature in the duct rises above 72°C. The
damper can also be unlocked and reset manually.
1. unlocking button
2. resetting handle
3. cable entrance
1
3
2
Options - at the time of order
FCU
Limit switch ‘closed’
FDCU
Unipolar limit switch ‘open/closed’
FDCB
Bipolar auxiliary limit switch ‘open/closed’
Unlocking
∎
manual unlocking
: use the unlocking button (1).
∎
automatic unlocking
: when the fusible link melts at 72° C.
∎
remote unlocking
: n/a
Resetting
∎
manual resetting
: use the enclosed Hex key and turn clockwise(2).
∎
motorised resetting
: n/a
Caution:
The mechanism may never be tested on its own, without being attached to the damper. Such a test might damage the
mechanism or the operator might be injured.
