Selection Guide

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
86
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
Fi
g
ure A
I
n
s
t
alla
t
io
n
I
n
s
tr
uc
t
io
n
s
M
echanical Installati
on
universal clamp. If you are mountin
g
the actuator with the “CCW” side out,
p
osition the clamp so that the pointer section o
f
the tab is pointing to 0° (see
Figure
C
) and the spline pattern of the clamp mates with spline of the actuator.
S
lip the clamp over the spline. (Use the same procedure if the “
C
W” side is out.)
I
f
your application requires a mechanical minimum position, read the
R
otatio
n
Limiting, Mechanical Minimum Damper Position
sec
ti
o
n.
n
4
. Lock the clamp to the actuator using the retaining clip.
5. Verify that the damper is still in its full fail-safe position.
6
.
S
li
de
th
e
ac
t
ua
t
o
r
o
v
e
r th
e
s
h
a
ft
.
7.
P
os
i
t
i
on t
h
e actuator
i
n t
h
e
d
es
i
re
d
l
ocat
i
on.
8. Tighten the two nuts on the clamp using a 10mm wrench or socket using 6-8
ft-lb of tor
q
ue.
9. Slip the stud of the anti rotation strap into the slot at the base of the actuator.
T
he stud should be
p
ositioned a
pp
roximatel
y
1/16 of an inch from the closed end
of the slot. Bend the strap as needed to reach the duct. Attach the strap to the
duct with #8 self tapping screws
.
Short Shaft Installation
If the shaft extends at least 3/4” from the duct, follow these steps
:
1. Determine the best orientation for the universal clam
p
on the back of the
a
ctuator. The best location would be where
y
ou have the easiest access to the
V
bolt nuts on the clam
p.
2.
E
ngage t
h
e c
l
amp to t
h
e actuator as c
l
ose as poss
ibl
e to t
h
e
d
eterm
i
ne
d
l
ocat
i
on.
3. Lock the clamp in place using the remaining retainer clip
.
4. Verify that the damper is still in its full fail-safe position.
5. Slide the actuator over the shaft
.
6. Position the actuator in the desired location
.
7.
Ti
g
h
ten t
h
e two nuts on t
h
e c
l
amp us
i
ng a 10mm wrenc
h
or soc
k
et us
i
ng 6-8
f
t-lb o
f
torque.
8. Slip the stud of the anti-rotation strap into the slot at the base of the actuator.
The stud should be
p
ositioned a
pp
roximatel
y
1/16 of an inch from the closed end
o
f the slot. Bend the stra
p
as needed to reach the duct. Attach the stra
p
to the
duct with #8 sel
f
tapping screws
.
9. If damper position indication is required, use the optional IND-AFB pointer. See
F
i
gure
A
.
Jackshaft Installation
The NFB, NFX… series actuator is designed for use with jackshafts up to 1.05” in
diameter. In most applications, the NFB, NFX actuator may be mounted in the same
manner as a standard damper sha
f
t application. I
f
more torque is required than one
NFB, NFX actuator can provide, refer to AFB, AFX or AF series actuators.
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
Correct clamp mountin
g
position if actuator is at
f
u
ll f
a
il-
sa
f
e.
Correct pointer mountin
g
p
osition if actuator is a
t
f
ull fail-safe
.
C
orrect clamp mountin
g
p
osition if actuator is a
t
5
° pre
l
oa
d
.
C
orrect pointer mountin
g
position if actuator is a
t
5° preload.
M40024 - 05/10 - Sub
j
ect to chan
g
e. © Belimo Aircontrols
(
USA
)
, Inc.