FFU Installation instructions page3(Filter Installation)

- Nov 20, 2018-


Bench Top Replaceable Filter(BTR)

NOTE: Extreme caution should be taken to aviod contact with filter media. Touching filter media result in filter failure. Damage to filters can occur during installation or during leak qualifiacation testing. The filteers supplied by SAF have been 100% tested and certified by the manufacturer to be free of detects and leaks. SAF cannot accept responsibility for damage that occurs after shipment, whether through transit, handling or installation, and will not replace filters under our standard warranty.

NOTE: If ordered with FIlter or Motor LED indicator, refer to LED installation instructions which must be done at same time as filter installation.



Optional Accessories

Aerosol Sample Port, Static Port and Aerosol Injection Port(INJ)

STEP1: If unit has room side removable filter, remove diffusers perforated face by turning quarter turn fasteners holding face in place.

NOTE: Safety cables will be attached to the diffuser face, but care should be taken to wnsure that diffuser face does not swing and injure anyone.

If unit is bench top removable, proceed to next step.

STEP2: Remove threaded plug covering ATS port using a 5/16" hex screw driver.


STEP 3: Insert aerosol test fitting or adaptor(the aerosol)injection port has a 3/8" NPT internal thread) into Aerosol Injection port.

NOTE: An adaptor/ test fiffing that is longer 1.5" and/or wider than 1" will not fit.

STEP 4: Inject aerosol test agent and measure particulate counts according to local codes.

NOTE: Aerosol Sample port canbe used to measure upstream particle counts. 

STEP 5: Disconnect test equipment, and reinstall plugs in the static pressure(if applicable) and aerosol injection ports. Reinstall diffuser face (if applicable).

If the safety cables were also disconnected when removing the face, they must be reattach. when reinsalling the face, care should be taken to tuck safety cables in plade without damaging the filter.

NOTE: Airflow and aerosolchallenge concentration should be kept uniform during the test . Static pressure and concentratin may be sampled through the static pressure port during the test, if required, to verify flow and concentration.

TABLE II outlines a few possible problems that may be encountered during leakage testing. This chart is intended as a quick troubleshooting guide, and is not exhaustive. All local and applicable codes should be followed.




Leakage at the perimeter of the filter.Improper filter installation.

Gently remove the filter, verify that the gel seal is intact and undam-aged, and carefully reseat the filter in the knife edge frame and latch in place.

 Pinhole leaks detected in filter.Improper handling of filter/damage during installationFilter may be repaired by a trained technician.
Leakage at the perimeter of the fan filter unit.Improper seal between unit and ceiling plenum.
Check seal between unit and ceiling plenum and seal as required.
Particle Counter is beeping at multiple locations, even away fromfilter face.
Possible leakage through adjacent lights,fiffusers and/ or ceiling panels.
 Isolate unit by placing carboard or sheet metal to create verticla"walls" extending 2ft below the ceiling plane. If filter passes, sealing of adjacent light, diffusers, and/or ceilling panels may be required.