User Manual

ManualsBrandsAERCO ManualsEquipmentBelimo AF120-S US Actuator

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA

Installation Instruction

echanical Installatio

Determining Torque Loading and Actuator Sizing

Damper torque loadings, used in selecting the correct size actuator, should be

rovided by the damper manu

acturer. I

this in

ormation is not available, the

ollowing general selection guidelines can be used.

Dam

er T

e Torque Loadin

Opposed blade, without ed

e seals

or non-tight close-off application

3 in-lb/s

. ft

ara

e, w

out e

e sea

or non-tight close-off application

4 in-lb

. ft

Opposed blade, with edge seals

or tight close-off application

5 in-lb

sq. ft

Parallel blade, with edge seals

or tight close-off application

7 in-lb/s

. ft

The above torque loadings will work for most applications under 2 in. w.g. static

ressure or 1000 FPM face velocit

. For a

lications between this criteria and 3 in.

. or 2500 FPM, the torque loadin

should be increased by a multiplier of 1.5. If

he application calls

or hi

her criteria up to 4 in. w.

. or 3000 FPM, use a multiplier

of 2.0

orque Loading Char

46810

579

Damper Area (sq. ft.)

Torque Loading (in-lb/

sq. ft.)

General Information

mo actuators s

e mounte

oors

n a

ry, re

y c

ean env

ronment

ree

rom corrosive

umes. I

the actuator is to be mounted outdoors, a protective

osu

used

For new construction work

order dam

ers with extended shaft

. Instruct the

installing contractor to allow space for mounting and service of the Belimo actuator on

he shaft. The damper shaft must extend at least 3 1/2” from the duct. If the shaft

extends less than 3-1/2” or if an obstruction blocks access, the shaft can be extended

with the AV 10-18 sha

t extension accessory or the actuator may be mounted in its short

haft configuration.

Mechanical Operation

he actuator is mounted directl

to a dam

er shaft u

to 1.05” in diameter b

means o

its universal clamp. A crank arm and several mounting brackets are

available

or applications where the actuator cannot be direct coupled to the damper

t. The AF series actuators provide true spring return operation

or reliable

ail

e application and positive close-o

on air ti

ht dampers. The sprin

return

stem

rovides constant tor

ue to the dam

er with, and without,

ower a

lied to

the actuator. The AF…-S versions are provided with 2 built-in auxiliary switches.

hese SPDT switches are provided for safety interfacin

or si

nalin

, for example,

for fan start-up. The switchin

function at the fail-safe position is fixed at +5°, the

other switch

unction is adjustable between +25 to +85°.

Automatic Airtight Dampers/Manual Override

he AF series provides 95° o

rotation and is provided with a graduated position

ndicator showin

0° to 95°.

he AF has a unique manual positioning mechanism which allows the setting o

any

amper position within its 95° of rotation. A pre-tensioned spring automatically

htens damper when power is applied to the actuator, compensatin

for damper

eal deterioration.

he actuator is shipped at +5°

(

5° from full fail-safe

)

to provide automatic

ompression against damper gaskets

or tight shut-o

. When power is applied, the

manual mechanism is released and the actuator drives toward the

ull

ail-sa

osition.

Standard Mounting

TE: The AF…series actuator is shipped with the manual override adjusted

or a +5° position at the universal clamp

(

not at full fail-safe, 0°

)

. This allows

or automatic com

ression of dam

er blade seals when the actuator is in use,

rovidin

ht shut-off. This assumes that the damper is to have ti

ht shut

off

at the

ail-sa

e position. I

tight close-o

is desired at the opposite

irection from fail-safe

the manual override should be released so the

ctuator can go to the full fail-safe position. See the manual override

instructi

. 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

out.

All

er steps are

ent

. The actuator is usually shipped with the universal clamp mounted to the “

W”

ide o

the actuator. To test

or adequate sha

t len

th, slide the actuator over the

haft with the side marked “

W”

(

or the “

W” side if this is the side with the

lamp

)

. If the shaft extends at least 1/8” throu

h the clamp, mount the actuator

ollows. I

not,

o to the

Short Shaft Installation

section.

. I

the clamp is not on the correct side as determined in step #1, re-mount the

lam

ollows. I

it is on the correct side,

roceed to ste

#5. Look at the

niversal clamp. If you are mountin

the actuator with the “

W” side out,

osition the clamp so that the pointer section of the tab is pointin

to 0°

(

see

ure

)

and the spline pattern of the clamp mates with spline of the actuator.

lip the clamp over the spline. (Use the same procedure if the “

W” side is out.) If

your app

cat

on requ

res a mec

mum pos

on, rea

otat

Limiting, Mechanical Minimum Damper Position

sect

on.

e c

amp to t

e actuator us

e reta

. Veri

y that the damper is still in its

ull

ail-sa

e position.

r th

7. P

iti

n th

r in th

des

oca

ten t

e two nuts on t

e c

amp us

ng a 10mm wrenc

or soc

et us

ng 6-8

t-lb o

tor

ue.

the stud of the anti rotation stra

into the slot at the base of the actuator.

The stud should be positioned approximately 1

16 of an inch from the closed end

of the slot. Bend the stra

as needed to reach the duct. Attach the stra

to the

duct with #8 sel

tapping screws