There are several types of FCUs. Some FCUs use channels, some don't. Just as some FCUs are part of the ventilation system, some are not. They are often available in vertical and horizontal configurations that can be mounted on the floor, ceiling or wall.
Many devices are designed to operate independently, but some are connected as part of a high-rise HVAC system. The FCU can also be connected to building automation systems, including thermostats, and controlled from a central control panel or computer.
Before attempting any maintenance on your FCU, you must follow proper locking procedures. This prevents the device from being operated during maintenance.
Always check the device inside and out and remove dirt and dust. Be sure to remove dust from the engine and blades. The accumulation of dust on the blades can cause imbalance.
Replace the filter with every preventive maintenance.
The oil line must be lubricated with grade 20 oil without detergent to ensure all moving parts are free to move. Do not lubricate the ball bearings.
No oil line? If your FCU does not have an oil line, see the owner's manual for lubrication instructions.
Replace dry, cracked or worn belts.
If the coil needs cleaning, remove the motor/oven module and brush between the blades. Follow this up by vacuuming the fins. Alternatively, you can use a compressed air system to blow air from the exhaust surface through the coil fins.
If the motor makes strange noises, vibrates, or does not work at all, contact a technician for further repair.