Greenheck FSAF24-BAL User Manual

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FSAF24-BAL (-S) US

70793-00001

Balancing Fire and Smoke Actuator, Three Position
Damper Actuator, Spring Return Closed, 24V, for
UL555(S) Fire and Smoke Dampers. A maximum
position potentiometer is built-in. 100% open override.

Application

For three position control of UL555S rated dampers in HVAC. Actuator
sizing should be done in accordance with the damper manufacturer’s
tests. In the absence of other information, use 10 in-lb of torque per
square foot of area for opposed blade and 14 in-lb for parallel blade fire
and smoke dampers at 1000 fpm air velocity.

The FSAF24-BAL is specifically designed to balance the air flow in ducts
and simultaneously provide control of fire and smoke dampers. 0V =
spring closed. 24V on wire 2, not 3 = drive to the potentiometer position
(balanced flow). 24V on wire 3, regardless of the status of wire 2 = drive
full open (smoke control extraction or pressurization). See Application
drawings below.

Operation

The FSAF24-BAL actuator provides spring return operation. There is no
reversing switch. Mount in spring return closed position. The torque
is asymmetrical giving 180 in-lb drive and 133 in-lb spring. A manual
override winder and locking mechanism is provided. If the manual winder
is used when the actuator is powered, the actuator will release, drive
closed, and then go back to the potentiometer position. The actuator may
not be mechanically parallelled or “piggybacked.” Each damper section
should be controlled by a separate actuator.

The FSAF24-BAL uses a DC motor which is controlled by a microchip.
The actuator may be stalled anywhere during its rotation without damage.
If power is removed, the damper will spring closed. Interlocks must be provided
as necessary for life safety functions and to shut down fan if required.

Dimensions (All numbers in brackets are metric.)

Standard

½” to 1.05”

Optional

½”

Technical Data FSAF24-BAL US

Power supply 24 VAC ± 20% 50/60 Hz

24 VDC ±10%

Power consumption running: AC 9.5 VA 6.5 W

DC 6 W

holding: AC 5 VA 3 W

DC 3 W

Transformer sizing 10 VA (Class 2 power source 24V only)

Electrical connection 3 ft, 18 ga, ½” conduit connectors

Overload protection electronic throughout 0 to 95° rotation

Control signal 24 VAC/DC 3-position

Angle of rotation 20° to 95°, pot adjustable

Torque 133 in-lb [15 Nm]

Direction of rotation reversible with CW/CCW mounting

Position indication visual indicator, 0° to 95°

(0° is spring return position)

Manual override 3mm hex crank (shipped w/actuator)

Running time motor: <75 seconds @ 250°F [121°C]

spring return: <20 seconds

Humidity 5 to 95% RH non-condensing

Ambient temperature -22°F to +122°F [-30°C to +50°C]

Storage temperature -40°F to +176°F [-40°C to +80°C]

Housing NEMA type 1 / IP40 (with flex conduit)

Housing material zinc coated metal

Agency listings cULus to UL 873 and CAN/CSA C22.2

No. 24-93

Noise level running: <45 dB(A), spring: <62 dB(A)

Holding inaudible

Servicing maintenance free

Quality standard ISO 9001, 5 year Belimo warranty

Weight 5.3 lbs (2.4kg)

5.7 lbs (2.6kg) for -S model

Auxiliary switch

2 x SPDT, 7A resistive, 2.5A inductive at
120/250 VAC, UL listed, double-insulated, one
switch is fixed at 10°, one is adjustable 30° to 90°

Accessories (AF series accessories may be employed)

S1

S2

S3

S4

S5

S6

IND-AF2 Damper position indicator

K4-1 US Universal clamp for up to 1.05” dia. jackshafts

KH-AF Crankarm for up to ¾” round shaft (Series 2)

KH-AF-1 Crankarm for up to 1.05” jackshaft (Series 2)

KH-AFV V-bolt kit for KH-AF and KH-AF-1

Tool-01 10 mm wrench

ZDB-AF2 Angle of rotation limiter

ZG-100 Universal mounting bracket

ZG-101 Universal mounting bracket

ZG-103 Universal mounting bracket

ZG-104 Universal mounting bracket

ZG-106 Mounting bracket for Honeywell® Mod IV replace-

ment or new crankarm type installations

ZG-107 Mounting bracket for Honeywell® Mod III or

Johnson® Series 100 replacement or new crankarm
type installations

ZG-108 Mounting bracket for Barber Colman® MA 3../4..,

Honeywell® Mod III or IV or Johnson® Series 100
replacement or new crankarm type installations

ZG-AF Crankarm adaptor kit for AF/NF

ZG-AF108 Crankarm adaptor kit for AF/NF

ZS-100 Weather shield (metal)

ZS-150 Weather shield (polycarbonate)

ZS-300 NEMA 4X housing

22965-00001 12mm form fit square shaft adaptor

For an overview of how to apply the accessories, see Belimo Mechanical
Accessories and refer to the Belimo Mounting Methods Guide.

Safety Note

The actuator contains no
components which the user
can replace or repair.

FSAF24-BAL (-S) US Typical Specification

Where indicated on drawings, combination fire and smoke and balancing
dampers shall be controlled by Belimo FSAF24-BAL or equal actuators.
The actuators must be designed so that they may be used for either
clockwise or counter clockwise failsafe operation. Actuator shall open
damper in <75 seconds per UL555S and shall spring closed in under 20
seconds. Actuators shall have a 5-year warranty and be manufactured
under ISO9001 International Quality Control Standards.

Actuator shall have an adjustable Maximum Opening Potentiometer which
shall be used by the TAB contractor to adjust flow to that portion of the
system fed by the damper.

The actuator shall spring closed if either the smoke detector or alarm
system removes power from it. Actuator shall spring closed if the primary
temperature thermodisc opens due to high ambient of >165°F or as
otherwise indicted on drawings.

The actuator shall drive full open if either the smoke control system 100%
open override or Fire Fighters Smoke Control Station override is activated.
Damper shall spring closed again if the thermodisc of a combination fire
and smoke damper opens due to high temperature (typically 250°F).

NOTE: When using FSAF24-BAL (-S) actuators, only use
accessories listed on this page.

Wiring Diagrams Auxiliary switch wiring for FSAF24-BAL-S US

Line

Voltage

24 VAC Transformer

OVERRIDE CONTROL
See Wiring Diagrams

4

on following pages for
typical methods.

1 Blk Com
2 Red Hot

3 Override Open

FSAF24-BAL US

3

1

NC

10°

NO

NC

30° to 90°

NO

2

FSAF24-BAL-S US

1

3

2

4

For end position indication,
interlock control, fan start-up,
etc., FSAF24-BAL-S incorporates
two built-in auxiliary switches:
2 x SPDT, 7A resistive, 2.5A
inductive 120/250 VAC, UL
listed, one switch is fixed at 10°,
one is adjustable 30° to 90°.

2

Meets UL requirements without

1

the need of an electrical ground

1

Provide overload protection and disconnect as required.

2

Actuators may be connected in parallel. Power consumption
must be observed.

3

Actuator may also be powered by 24 VDC

4

Only connect Hot, Wire 2 to Wire 3 override control

2

connection. Actuator may also be
powered by 24 VDC

3

Double insulated.

4

Actuators may be connected
in parallel. Power consumption
must be observed.