Selection Guide

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
88
I
n
s
t
alla
t
io
n
I
n
s
tr
uc
t
io
n
s
M
echanical Installatio
n
Manual Override
Th
e
NF
B,
NFX
series actuators can be manually positioned to ease installation or for
X
emergency positioning.
1. The manual override will only work i
f
no power is available to the actuator.
2
. Insert the manual crank (shipped with the actuator) into the hexagon hole located
on either side of the actuator. An illustration, located on the label, shows the
location
.
3. Turn the crank in the direction shown on the label
(
clockwise on the “CW” side,
counterclockwise on the “CCW” side). It will take approximately 23 revolutions to
rotate the full 95° of rotation
.
4
. To lock the actuator in the required position, flip the switch to the locked position
that is located to the right of the crank on the CCW side of the actuator (left of
the crank on the CW side).
5
.
Th
e manua
l
overr
id
e may
b
e
di
sengage
d
i
n 2 ways.
- Flip the switch to the unlocked position and the actuator will go to its fail-safe
position.
- Apply power to wire 1 and 2. The actuator will automatically disengage the
override function and will
g
o to the “on” position in the case of the On/Off
versions. Or, in the case of the proportional versions, go to the 0 signal
position and then
g
o to the position correspondin
g
to the control si
g
nal. The
actuator will now work normall
y
.
CCW Side Example
:
W
i
nd
i
n
g
the
d
amper actuator
- insert crank handle
- turn
h
an
dl
e
i
n
di
rect
i
on
of arro
w
Lock
i
n
g
the
d
amper actuator
- Flip the lock switch to
t
h
e pos
i
t
i
on po
i
nt
i
ng to
the “locked” s
y
mbol
Unlock
i
n
g
the
d
amper actuato
r
(
2 options
)
-
Fli
p t
h
e
l
oc
k
sw
i
tc
h
to
t
he position pointing to
t
he “unlocked” s
y
mbol
.
-
Remote control by
s
upplyin
g
power to the
u
nit
f
or > than 3 sec
.
Testing the installation Without Power
The actuator/dam
p
er installation ma
y
be tested without
p
ower at the actuator. Refer
to the manual positionin
g
section o
f
the instructions. Move the damper to its
f
ull
non-
f
ail-sa
f
e position usin
g
the manual crank. Disen
g
a
g
e the manual position
mechanism and have the damper
g
o to full fail-safe position.
C
orrect any
mechanical problems and retest.
Auxiliary Switches
T
he NFB, NFX series actuators ma
y
be ordered with 2 built-in SPDT auxiliar
y
switches
u
sed for safety interfacing or signaling, for example, for fan start-up. The switch
p
osition near the fail-safe position is fixed at 10°. The other is adjustable between 10°
and 90° o
f
rotation. The crank that is supplied with the actuator is used to change the
s
witch position.
SWITCH RATING
Voltage R
es
i
s
tiv
e
L
oad
I
n
duc
tiv
e
L
oad
1
20 VA
C
3A
1.03
A
2
50 VA
C
3
A 0.5A
T
wo methods may be used to adjust the switching point of the adjustable switch.
M
et
h
o
d
1 -
S
ee
Fi
gure
F
1
The actuator must be in its fail-safe position.
2
. Insert the crank handle into the torx sha
p
ed hole located in the center o
f
the
a
dj
usta
bl
e sw
i
tc
h
po
i
nter
.
3
.
G
ently rotate the crank until the switch pointer is at the desired switch point in
de
g
rees as shown.
NF
B,
NFX... Series
.2
.4
.6
.8
.2
.4
.6
.8
.2
.4
.6
.8
F
I
G
URE F
M
ethod
2
- See
F
i
g
ure G
1
. Position the dam
p
er to the
p
oint at which
y
ou want the switch to activate. This
may be done by using the manual override or by providing the appropriate
p
roportional signal to NFB24, NFX24… modulating type actuator. The position o
f
the switch pointer is not important durin
g
this ste
p
2
. Insert the crank into the hexa
g
on shaped hole located in the center of the
ad
j
ustable switch pointer
.
3
. Gently rotate the switch pointer to
j
ust past the switch point indicatin
g
arrow as
s
h
o
wn.
NF
B
, NFX...
Se
ri
es
.2
.4
.6
.8
.2
.4
.6
.8
.2
.4
.6
.8
F
IGURE
G
M40024 - 05/10 - Sub
j
ect to chan
g
e. © Belimo Aircontrols
(
USA
)
, Inc.