The wiring below is commonly connected to alarm or smoke control electronic modules in modern
systems. The functional sequence is the same.
To alarm
system
N or
COM
BELIMO
FSLF or FSNF
ACTUATOR
TYPICAL SENSOR
TEMPERATURES
165
°F
350°F
HOA
FIRE FIGHTERS
CONTROL PANEL
HOT
120 or
24 VAC
A
O
H
FSAF actuators are
250°F only..
Smoke detector
or relay contacts
TYPICAL REOPENABLE DAMPER with FSCS
Investigate cause of Honeywell failure. For example, was old external spring removed correctly?
Honeywell motor
was installed as a
retrofit on dampers
with fusible links.
There is no electric
sensor in the
damper in that case
as there is typically
a shaft spring
performing the fire
function. Wiring is
shown to right.
HOT
120 or
24 VAC
SMOKE DAMPER ACTUATOR WIRING
Smoke Detector or Relay from area
smoke detection system
BELIMO
FSxx
ACTUATOR
N or
COM
Fusible link DAMPER ACTUATOR WIRING
WARNING!
Note that where any fire alarm wiring is touched, the fire department must be
informed.
Air Balance Honeywell ML&MS Types to Belimo FSxx March 2018
18