A) Problem: When the DM3000P is on "STANDBY" it does not come ON.
1) The pressure switch's positive pressure port is not connected.
Solution: Use the supplied tube and grommet and install one end of the tube to the supply (positive pressure) air duct and the other
end of the tube to the pressure switch connection on electrical panel next to the power cord.
2) The pressure differential between the return (negative) air and the supply (positive) air of the forced air system is less than 18
Pa (0.07 in wg).
Solution: Check the static pressure difference by connecting the LOW pressure side of a manometer to the return air duct and the
HIGH pressure side of the manometer to the supply air duct. If it reads less then 18 Pa (0.07 in wg), the pressure switch will not
work. The only remedy is to set the rocker switch to "CONTINUOUS". Check this differential pressure on all available speeds of the
forced air system.
B) Problem: When the DM3000P is on "STANDBY" it does not turn OFF.
1) Other exhaust equipment in the house may interfere with the operation of the DM3000P by creating pressure differences in the
forced air system's duct work.
Solution: If this is a constant problem, disconnect the positive pressure tube from the DM3000P to the supply air duct. Check if
the DM3000P turns ON when the forced air system is on and turns OFF when the forced air system is OFF.
Depending on the furnace and the duct design, the negative static pressure in the duct may not be more than 17Pa (0.07"WC). As such, the
pressure switch will not activate the DM3000P while it is on "STANDBY" mode.
S E R V I C E
The useful service life of the filter media in the HEPA Filtration System is directly related to the volume of air passed through the system and the
amount of contaminants in the air. In a typical residential application, Stage 1 and 2, filters should be replaced every three to six months or when
needed. The Stage 3 HEPA filter should have a life span of two to five years, again, depending on the amount of particulate in the air and the main-
tenance of the Stage 1 pre-filter.
Stage 1 -
Prefilter
: Air passes through the prefilter where larger particles are taken
out of the air. (part number 410472)
Stage 2 -
Carbon
: Air passes through the carbon filter where some gases and odors
are removed. (part number 410473)
Stage 3 -
HEPA
: Air passes through the certified HEPA media where very small par-
ticles are removed. 99.97% of all particles 0.3 microns and larger that
pass through this stage are removed. Particles smaller than 0.3 microns
are also removed with less intensity.
If the air flow through your unit is noticeably reduced, you can inspect the
HEPA filter by removing it and seeing if the filter paper is darkened on the
inlet or outer side. If it is, the filter cartridge should be replaced. (part
number 410985)
Please contact your local Fantech dealer or call HEPA Customer Service at
1.800.565.3548 regarding replacement of filter media, warranty informa-
tion or if you have any questions or
concerns about the performance of your HEPA Filtration System.
Replacement parts number for motor (410035)
and for capacitor (410040).
PA R T S L I S T
T R O U B L E S H O O T I N G
Fantech, reserves the right to modify, at any time and without notice, any
or all of its products’ features, designs, components and specifications to
maintain their technological leadership position.
Article #: 301085
Item #: 401451
Rev Date: 092404
United States
1712 Northgate Blvd.,
Sarasota, FL. 34234
Phone: 800.747.1762; 941.309.6000
Fax: 800.487.9915; 941.309.6099
www.fantech.net; [email protected]
Canada
50 Kanalflakt Way,
Bouctouche, NB E4S 3M5
Phone: 800.565.3548; 506.743.9500
Fax: 877.747.8116; 506.743.9600
www.fantech.ca; [email protected]
