Price FFU Series, LFDC Series, RFDC Series, FRFDC Series User Manual

USER MANUAL

INJ Aerosol Injection Port User Manual
for Filtered Diffusers

FFU, LFDC, RFDC, FRFDC

v000 – Issue Date: 10/15/19

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AEROSOL INJECTION PORT USER MANUAL FOR FILTERED DIFFUSERS

Always Read & Understand All Installation Instructions Prior to Starting

This instruction applies to the use of the Aerosol Test System option for Filtered filtered laminar flow diffusers. It is intended as a
guide to assist properly trained and qualified technicians.

The Aerosol Test System enables an aerosol challenge to be dispersed into the diffuser inlet, to validate that the filter is properly
installed and undamaged.

At a minimum it is suggested that scanning be conducted at initial startup, and with every subsequent filter replacement. Scanning
is to be conducted after the diffuser and filter have been installed, and airflow balanced.

Step 1

Release 1/4 turn fasteners and remove diffuser face. Face panel may gently be lowered until is it suspended by the safety cables,
or safety cables may be unclipped and the face removed from the work area.

Step 2

Check static pressure inside the diffuser plenum. A sampling port is provided for this purpose, which can be connected by friction
fitting 1/4" O.D. or 11/32" O.D. flexible tubing into the port. Low pressure indication should be open to room atmosphere. Record
this reading. Additional readings may be taken during testing to demonstrate that pressure drop across the filter, and therefore flow
rate, remains constant during the test.

Connect aerosol generator to the aerosol injection port. The port is a 3/8" NPT pipe connection, accessed by removing the hex
socket head plug using a 5/16 “ hex key.

Step 3

Turn on and adjust aerosol generator. Aerosol concentration upstream of the filter may be sampled through the static pressure
port. Selection of aerosol challenge fluid and concentration should be made according to the standards or test protocols in effect
for the facility. For example, poly-alpha-olefin (PAO) in concentrations of 10 µg / L to 90 µg / L.

Step 4

Scan test the downstream filter face for any leaks, following the standards and protocols in effect for the facility.

Step 5

Diconnect test equipment, and reinstall plugs in the static pressure and aerosol injection ports. Reinstall diffuser face. If the safety
cables were also disconnected when removing the face, they must be reattached. When reinstalling face, care should be taken to
tuck safety cables in place without damaging the filter. Make sure all 1/4 turn fasteners are firmly latched.

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