
TM-2
™
and TM-4
™
Ceiling Filter Modules
Operation
Once in position, the modules may be balanced and tested.
1.
Adjust the main air supply duct system for total design air
volume before attempting to balance any of the filter
modules.
2.
On units equipped with an adjustable damper-diffuser,
access by removing the well nut plug and inserting a #4
Phillips screwdriver.
3.
On units equipped with an adjustable damper-diffuser,
adjust as required in conjunction with the system branch
duct damper to provide the desired air volume.
NOTE: The adjustable disc type damper-diffuser is a trim
device and is not intended to induce a large pressure drop.
4.
Reinstall the well nut plug into the diffuser adjustment port.
5.
Determine the actual total air volume (in CFM) through
each module by using a soft balancing hood equipped
with a velometer.
Testing
1.
The modules may be leak tested in place.
2.
AAF Flanders does not recommend introducing a
challenge aerosol through the port in the face of the filter.
The
7
⁄
16
″ diameter port is too small for proper mixing, and
the challenge aerosol may condense on the diffuser
plate, eventually dripping down onto the media pack.
NOTE: The same port is used for both diffuser adjustment
and for insertion of a probe to measure the contamination
level of the supply air.
3.
AAF Flanders recommends that the challenge aerosol be
introduced into the ductwork at least ten duct diameters
upstream from the module, or preferably into the fan
intake. The port in the face of the filter may be used to
check the contamination level of the supply air at any time.
4.
Your AAF Flanders representative can offer several
alternative suggestions and techniques on testing. Contact
AAF Flanders Customer Service toll free at 877.228.7007
for assistance.
Maintenance
TM Series modules need no maintenance. When installed
downstream of a good system of AAF Flanders prefilters
(90% AHSRAE efficiency recommended), they should provide
years of service.
A periodic (annual) check of airflow is recommended. The
modules should be changed when the desired airflow is
no longer achieved due to accumulated dirt buildup on the
filters, which increases resistance. Discard the entire module
and replace with new units.
Typical TM module installation
9920 Corporate Campus Drive, Suite 2200, Louisville, KY 40223-5690
888.223.2003 Fax 888.223.6500 | aafintl.com
AAF Flanders has a policy of continuous product
research and improvement and reserves the right to
change design and specifications without notice.
ISO Certified Firm
©2017 AAF International and its affiliated companies.
AFP-3-475D 01/17