6
844 OPERATOR
The FAAC Model 844 is an electro-mechanical operator for
sliding gates transmitting motion to the sliding leaf via a rack or
chain pinion appropriately coupled to the gate.
The non-reversing system ensures the gate is mechanically
locked when the motor is not operating and, therefore, no lock
needs to be installed.
The gearmotor is equipped with a mechanical clutch which,
combined with an electronic device, offers the necessary adju-
stable anti-crushing safety and guarantees stopping or reversing
the gate movement. A handy manual release makes it possible
to move the gate in the event of a power cut or malfunction.
The control board, if supplied with the gearmotor, it is placed
inside the operator.
The 844 automated system is designed and manufactured to
control access of vehicles. Do not use for any other purpose.
1. Mounting Brackets
2. Pinion
3. Limit Sensor Switch
4. Operator Cover
5. 780 D Control Board
6. Adjustment Screw for
Anti-crushing Clutch
7. Oil Filling Plug
8. Operator Grounding
9. Lever Operated Release
System
10. Protective Side Panels
11. Cover for 780D Control
Board
Fig. 1
1.1.
Maximum Use Curve
The curve makes it possible to establish maximum work time (T)
according to use frequency (F). The 844 gearmotor can operate
non-stop at 70% use frequency.
To ensure efficient operation, operate in the work range below
the curve.
Important:
The curve is obtained at a temperature of 75°F. Expo-
sure to direct sunlight can reduce use frequency down to 20%.
Calculating Use Frequency
The percentage of effective work time (o closing) com-
pared to total time of cycle (o c pause times).
Calculation formula:
Ta + Tc
%F =
X 100
Ta + Tc + Tp + Ti
0
10
20
30
40
50
60
70
80
90
100
1
2
3
4
5
6
7
8
9 10 11 12
% Freq. Used
% Duty Cycle
Time (h)
Use Frequency Graph
Type of Pinion
Z16
Z20
Power Supply
115 Vac (+10% -6%)
Absorbed Power
650 W
Reduction Ratio
1 : 30
Max. Thrust
247 lbf
198 lbf
Max. Torque
26 lbf.ft
Winding Thermal Protection
248 °F
Use Frequency
70% (see graph)
Oil Quantity
1.9 qt
Type of Oil
FAAC HP
Ambient Operating Temperature
-4 to +131 °F
Weight
32 lb
Protection Class
IP 44
Gate Max. Weight
3950 lb
2200 lb
Gate Speed
38 ft/min
47 ft/min
Gate Max. Length
131 ft
164 ft
Clutch
twin-disk in oil bath
Protective Treatment
cataphoresis
Control Board
780D
Limit-Switch
magnetic or inductive
Overall Dimensions L x H x D
See Fig. 2
Electric Motor Technical Specifications
Rotation Speed
1700 r.p.m
Power
650 W
Current
7 A
Starting Capacitor
70 µF
Power Supply
115 Vac (+10% -6%)
1.2
Technical Specifications
1. DESCRIPTION AND SPECIFICATION
where:
Ta = opening time
Tc = closing time
Tp = pause time
Ti = time of interval between two complete cycles
