800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
nstallation and Operatio
Non-Spring Retur
General Information
Preliminary Steps
. Belimo actuators with NEMA 1 or NEMA 2 ratings should be mounted indoors in
a dry, relatively clean environment free from corrosive fumes. If the actuator is
mounted outdoors, a protective enclosure must be used to shield the actuator.
. For new construction work, order dampers with extended sha
ts. Instruct the
installin
contractor to allow space for mountin
the Belimo actuator on the shaft.
For replacement of existing gear train actuators, there are two options:
. From a performance standpoint, it is best to mount the actuator directly onto the
damper shaft.
. If the damper shaft is not accessible, mount the non-sprin
return actuator with
a Z
-NMA or Z
-
MA crank arm kit, and a mounting bracket (Z
-100, Z
-101,
ZG-103, ZG-104
Determining Torque Loading and Actuator Sizing
amper torque loadin
s, used in selectin
the correct size actuator, should be pro
vided by the damper manu
acturer. I
this in
ormation is not available, the
ollowing
eneral selection guidelines can be used
amper
ype
orque Loading
Opposed blade, without edge seals, for
non-ti
ht close-off application
in-lb/s
. ft
Parallel blade, without ed
e seals, for
non-ti
ht close-off application
4 in-lb/sq. ft
pposed blade, with edge seals, for tight
close-off a
lication
5 in-lb/s
. ft
Parallel blade, with ed
e seals, for ti
ht
close-off a
lication
7 in-lb/sq. ft
he above torque loadings will work for most applications under 2 in. w.g. static
ressure or 1000 FPM
ace velocity. For applications between this criteria and 3 in.
w.
. or 2500 FPM, the torque loadin
should be increased by a multiplier o
1.5. I
the application calls
or higher criteria up to 4 in. w.g. or 3000 FPM, use a multiplier
of 2.0
Torque Loading Char
140
120
100
80
60
40
20
0
2
3
46810
579
Damper Area (sq. ft.)
Torque Loading (in-lb/ sq. ft.)
Multiple Actuator Mounting
f more torque is required than one
M can provide,
M24B,
MB24-
R or
MX24-
FT may be installed on the same shaft
able of
ontent
PAGE
General Mountin
Standar
.............................................................
270
Reversible Clamp ...............................................
271
Lin
.................................................................272
otar
.................................................................273
Retro
it Bracket
.................................................
75
Operation
El
tri
l
.............................................................
27
Mechanica
.........................................................277
W
r
ng
Genera
...............................................................
278
Accessorie
........................................................
7
Startup and Checkout
..............................................
282
M40024 - 05/10 - Sub
ect to chan
e. © Belimo Aircontrols
USA
, Inc.
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