Operating mechanism
Operating mechanisms and electrical connections
OPERATION BY BIMETALLIC FUSE TH-70 + COIL +
RESET MOTOR (AUTOMATIC RESET)
SERVOMOTOR WITH RETURN SPRING
(AUTOMATIC RESET)
- Damper is closed (activated) by removing the power
supply (24 V or 230 V) to the servomotor with return
spring (“A” or “D”) or by switching off power by means of
a thermoelectric fusible link “B” when the temperature
exceeds 72° C inside or outside the damper.
-Damper is reset (opened) by providing electric supply
(24 V or 230 V) to servomotor with return spring (“A” or
“D”).
Manually inserting the lever in hole “A” and turning
clockwise.
- Damper is closed (operated) by providing electric
supply to shunt release or by switching off supply to
undervoltage release, or when alloy fuse is triggered by
temperatures over 72 °C
See p. 11 types of electrical power available in coils.
-Damper is reset (opened) by providing electric supply to
servomotor BL24-48 (24…48 V AC/DC) or BL110-230
(110 …230 V AC) until fully opened.
end (FC) and/or start
of run (PC) switch
COIL
MOTOR
end (FC) and/or start
of run (PC) switch
end and start of run switches
integrated in servomotor
Connection box 1
Connection box 1
Connection box 2
Connection box 2
Connection
box
{
MOTOR
Connection
box
Series SF
20
