Fan Filter Unit Model Ffu-Dc-Eb

FAN FILTER UNIT – MODEL FFU-DC-EB

FAN HOUSING Fan housing shall be walkable and made of 0.063 inch thick aluminum or minimum 18 gauge steel with baked on powder-coated finish. Sound insulating and absorbing housing lining made of non-flammable, odorless material. Provide a junction box on the top of unit.

FINAL FILTER (NON ROOM-SIDE-REPLACEABLE) Provide plenum style final filter as 2” [3”] [4”] pack depth in anodized extruded aluminum frame. Minimum particle efficiency of 99.9995% @ 0.12 microns [99.99% @ 0.3 microns]. The filter shall have a knife-edge to seat into gel grid or a flat bottom ledge for seating onto gasketed grid. The final filter shall have a coated metal screen on the downstream face to protect the filter. The fan housing shall sit directly on the final filter with a gasket seal between.

[FINAL FILTER (ROOM-SIDE-REPLACEABLE) The fan housing shall seat on top of an intermediate cartridge frame. This intermediate cartridge frame that shall have a flat bottom ledge for seating onto gasketed grid. Provide a roomside replaceable final filter with a gel trough with factory pre-applied gel. The final filter shall have a coated metal screen on the downstream face to protect the filter.]

MOTOR-IMPELLER Fan shall consist of an integrated motor and impeller; plug fan with one-sided suction, radial impeller with backward-curved blades made of aluminum, mounted directly to the rotor of the built-in motor, statically and dynamically balanced as per DIN ISO 1940, class G 6.3, optimized for use without spiral housing. Motor shall be an electronically commutated (EC) brushless DC external rotor motor. Motor-impeller shall be removable from room side or the top side.

CONTROLLER Provide an electronically commutated controller including active power-factor controller (PFC) for sinus-shaped main input as per EN 61000-3-2. The controller shall be capable of accepting single phase AC power input ranging from 208-277 Volts at 50/60 Hz without any external transforming devices. The controller shall be recessed into the FFU housing. The impeller, motor and controller shall be manufactured by a single original equipment manufacturer for compatibility.

MONITORING SYSTEM Each FFU shall have a built-in Modbus RTU communication card. The FFU shall have 2 female RJ45 jacks for daisy chain hookup of the communication cabling. The patch cables used to daisy-chain units to each other shall use Category 5 UTP cables with RJ-45 connectors for simple snap together attachment from one FFU controller to another. The FFUs will be daisy chained together in the field by the installing contractor and then hooked up to a small control console which is a standalone box for controlling and monitoring all the FFUs. A PC based system is not permitted. [The FFUs will be daisy chained together in the field by the installing contractor and then tied into the site building management system under Modbus RTU protocol by the controls contractor (not in the scope of the FFU supplier).]

PRE-FILTER Provide a 30/30 pre-filter (20”x20” for 2x4 FFU and 24”x24” for 4x4 FFU) mounted on top of unit, easily demountable on sheet steel housing framework, powder-coated inside and out.