Cross Reference
For greater detail see
.
Nominal sq.ft. per UL555S
testing.
Sq.ft.
Temp
Actuator
12 or less
350°F
FSNF
Ruskin
16 or less
350°F
FSAF*A
Ruskin
Ruskin has passed multiple sections with multiple FSNF& FSAF actuators.
The Phillips motor is no longer made. It was applied several different ways. Investigation into
the temperature sensing and spring return method is needed to confirm that replacement and
any rewiring is done correctly.
The Phillips motor did not have a spring in it.
To replace with
a modern Belimo with a spring, either of two changes may be necessary.
One, if a thermal sensor exists, the old spring must be removed or disconnected. Make sure
the spring cannot jam any part of the damper. The vast majority of these applications had the
thermal sensor initially.
Two, if a fusible link is present, then an electric thermal sensor like the Ruskin EFL may be
installed and wired according to one of the drawings in the wiring section.
Contact Belimo with
photographs of the installation for discussion.
Typical existing installations
Typical jackshaft spring
The Phillips P150 motor
was non-spring.
This spring will be disabled
by allowing damper to spring
closed, pounding out the
stud, sliding the spring down
the jackshaft, and resetting
the stud to prevent the spring
from interfering with damper
opera
tion.
Ruskin Phillips P150 to Belimo FSNF or FSAF March 2018
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