Wiring
There are three wiring schemes that describe all applications. While the geometry of the wire runs
may vary, the connections are straightforward.
HOT
120 or
24 VAC
TYPICAL FIRE - SMOKE COMBINATION
DAMPER WIRING
165°F
Smoke Detector or Relay from area
smoke detection system
BELIMO
FSxx
ACTUATOR
TYPICAL SENSOR
TEMPERATURES
N or
COM
Electric thermal disc
To alarm
system
Regardless of the wiring routes used, this drawing shows the wiring necessary for a UL555S
damper and actuator. Use it as a basis for any of the other wiring schematics. Note that the alarm
connections are not touched when replacing an actuator. This is a major concern for Fire
Marshals.
Honeywell with actuator wiring compartment used for junctions.
Com Hot
Green
Ground
Internal to
motor
Honeywell Wiring
165F
Thermodisc
Belimo Mechanical
FSLF
FSNF
strap
½” threaded
connector
Chase nipple
2x 4 box and
blank cover
Existing flex connector and
incoming power wires
165
F
Thermodisc
rotation Anti-
If necessary add a chase nipple and junction box as shown above right for wiring connections.
Air Balance Honeywell ML&MS Types to Belimo FSxx March 2018
17
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