Install Instructions

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
39
I
nstallation Instruction
s
Mechan
i
cal Installat
i
o
n
Determining Torque Loading and Actuator Sizing
D
amper torque loadin
g
s, used in selectin
g
the correct size actuator, should be
provided by the damper manu
f
acturer. I
f
this in
f
ormation is not available, the
f
ollowing general selection guidelines can be used
.
D
am
p
er T
ype
Torque Loadin
g
Opposed blade, without edge seals
,
for non-ti
g
ht close-off applications
3 in-lb/sq. ft
.
Parallel blade, without ed
g
e seals
,
for non-ti
g
ht close-off applications
4
in-lb
/
sq. ft
.
Opposed blade, with edge seals
,
for tight close-off application
s
5
in-lb/sq. ft
.
Parallel blade, with edge seals
,
f
or tight close-o
ff
application
s
7 in-lb/sq. ft
.
T
he above torque loadings will work for most applications with 1000 FPM face
velocity. For applications between this criteria and 2500 FPM, the torque loadin
g
should be increased by a multiplier of 1.5. If the application calls for hi
g
her criteria
up to 3000 FPM, use a multiplier o
f
2.0
.
T
orque Loading Chart
General Information
B
e
li
mo actuators s
h
ou
ld
b
e mounte
d
i
n
d
oors
i
n a
d
ry, re
l
at
i
ve
l
y c
l
ean env
i
ronment
f
ree
f
rom corrosive
f
umes. I
f
the actuator is to be mounted outdoors, a protective
e
n
closu
r
e
m
us
t
be
used
t
o
shield
t
he
ac
t
ua
t
o
r.
F
or new construct
i
on wor
k
,
o
rder dampers with extended sha
f
ts.
I
nstruct t
h
e
installin
g
contractor to allow space
f
or mountin
g
and service o
f
the Belimo actuator on
t
he shaft. The damper shaft must extend at least 4-3
/
4” from the duct. If the shaft
e
xtends less than 4-3/4” or if an obstruction blocks access
,
the shaft can be extended
with the AV 8-25 shaft extension accessor
y
or the actuator ma
y
be mounted in its short
sha
f
t con
f
iguration.
Mechanical Operation
T
he actuator is mounted directly to a damper sha
f
t up to 1.05” in diameter by
means o
f
its universal clamp. A crank arm and several mountin
g
brackets are
a
vailable
f
or applications where the actuator cannot be direct coupled to the damper
s
ha
f
t. The EFB, EFX series actuators provide true spring return operation
f
or reliable
fail-safe application and positive close-off on air tight dampers. The spring return
s
ystem provides constant torque to the damper with, and without, power applied to
the actuator. The EFB…-
S
, EFX…-
S
versions are provided with two built-in
a
uxiliary switches. These SPDT switches are provided for safety interfacin
g
or
s
i
g
nalin
g
, for example, for fan start-up. The switchin
g
function at the fail-safe position
i
s fixed at +10°, the other switch function is adjustable between +10° to +85° (for
N
EMA 4 versions, the second switch is fixed at +85°.
)
Automatic Airtight Dampers/Manual Override
T
he EFB, EFX series provides 95° o
f
rotation and is provided with a
g
raduated
p
osition indicator showin
g
0° to 95°.
T
he EFB, EFX has a unique built in manual positionin
g
mechanism which allows the
s
etting of any damper position within its 95° of rotation. A pre-tensioned spring
a
utomatically ti
g
htens the damper when power is applied to the actuator,
compensatin
g
for damper seal deterioration.
.
T
he actuator is shipped at +5°
(
5° from full fail-safe
)
to provide automatic
compression against damper gaskets for tight shut-off. When power is applied, the
manual mechanism is released and the actuator drives toward the full fail-safe
p
osition.
Y=0
Y=0
Standard Mounting
N
O
TE: The EFB, EFX…series actuator is shi
pp
ed with the manual override
a
djusted for a +5° position at the universal clamp
(
not at full fail-safe, 0°
)
.
T
his allows
f
or automatic compression o
f
damper blade seals when the
a
ctuator is in use, providin
g
ti
g
ht shut-off. This assumes that the damper is to
h
ave ti
g
ht shut-off at the fail-safe position. If ti
g
ht close-off is desired at the
opp
osite direction
f
rom
f
ail-sa
f
e, the manual override should be released so
t
he actuator can
g
o to the full fail-safe position. See the manual override
i
nstruct
io
ns
.
1. Manually move the damper to the fail-safe position
(
usually closed
)
. If the shaft
rotated counterclockwise (
), this is a CCW installation. If the shaft rotated
)
clockwise (
), this is a CW installation. In a CCW installation, the actuator side
)
marked “CCW” faces out, while in a CW installation, the side marked “CW” faces
o
ut.
All
ot
h
er ste
p
s are
id
ent
i
ca
l
.
2. The actuator is usuall
y
shi
pp
ed with the universal clam
p
mounted to the “CCW”
s
ide o
f
the actuator. To test
f
or adequate sha
f
t len
g
th, slide the actuator over the
s
haft with the side marked “CCW”
(
or the “CW” side if this is the side with the
clamp). If the shaft extends at least 1/8” through the clamp, mount the actuator
a
s follows. If not, go to the
Short Shaft Installation
section.
n
3
. If the clam
p
is not on the correct side as determined in ste
p
#1, re-mount the
clamp as follows. If it is on the correct side, proceed to step #5. Look at the
u
niversal clamp. If you are mountin
g
the actuator with the “CCW” side out,
Torque Loading Chart
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
2345678910
Torque Loading (in-lb/ sq. ft.)
Damper Area (sq. ft.)
N40103 - 09/11 - Subject to change. © Belimo Aircontrols (USA), Inc
.