Foundation Base and Mechanical Mounting Alignment
Mounting the FAAC 844 R 380V MC 3PH gearmotor requires a rigid, level concrete foundation plate to support the 15 kg pressure-cast aluminium housing. The operator base measures 277 mm in length, 155 mm in depth, and 388 mm in height. Engineered with height- and side-adjustable fastening mounting points, the chassis allows technicians to make fine positional corrections to establish precise parallel alignment between the motor drive shaft and the gate leaf.
The drive system features an internal irreversible mechanical reduction ratio of 1:30 that mechanically locks the gate leaf at rest, eliminating the requirement for electric locks. For unpowered leaf movement during site alignment, servicing, or power outages, technicians can activate the key-protected manual release lever mechanism to disengage the drive gearing from the transmission.
Pinion Selection and Drive Line Configurations
The FAAC 844 R 3PH is supplied without a drive pinion, allowing installers to select the specific pinion module or chain drive conversion sprocket required for the application's weight and velocity targets:
| Pinion Type | Max Leaf Weight | Max Leaf Width | Max Expressed Force | Linear Travel Speed |
|---|---|---|---|---|
| Z12 | 2,200 kg | 30 m | 2,500 N | 7.2 m/min |
| Z16 | 1,800 kg | 40 m | 1,900 N | 9.5 m/min |
| Z20 | 1,000 kg | 50 m | 1,500 N | 12.0 m/min |
Inductive Limit Switch Setup and Clutch Regulation
Gate travel endpoints are detected using an inductive limit switch interacting with steel limit plates secured along the leaf or rack. Precise alignment and clearance between the inductive sensor body and the metal trip plates are critical during installation; insufficient proximity or vertical misalignment prevents the inductive field from detecting the metal sheet, leading to overrun.
Mechanical anti-crushing safety and dynamic thrust regulation are handled by a twin-disk clutch operating in a continuous oil bath charged with FAAC HP OIL. Installers must set the mechanical clutch adjustment screw according to site gate mass. Excessive clutch tightening compromises anti-crushing safety compliance, while insufficient tension causes motor slippage during initial startup acceleration.
Three-Phase Mains Supply and Control Infrastructure
The operator requires a 380-415V~ 3PH+N mains electrical supply at 50/60 Hz to run its 950 W asynchronous three-phase 4-pole motor, which generates up to 62 Nm of torque. The electrical feed must be fitted with an upstream all-pole isolator switch offering a contact opening separation of at least 3 mm, alongside a 0.03 A differential residual-current device. An integrated thermal cut-off sensor halts motor operation if internal coil temperatures hit 155°C.
The system operates via built-in electronic control equipment or can interface with a dedicated external FAAC 844T microprocessor control panel featuring mechanical reversing contactors and active electronic braking. Active safety devices, including Category 3 resistive safety edges and external infrared photobeams, must be integrated across monitored safety terminals to meet the operational safety criteria mandated by EN 12453, EN 12445, EN 12604, and EN 12605.
