Instructions / Assembly

Page 3
If the WiFi Status Indicator blinks red before it goes out, a problem has occurred in connecting your
monitor to your wireless router or to the AirFilterSentry server. Go to the “WiFi Troubleshooting Guide”
in the Installation and Reference Guide to find the source of the problem. Once you have corrected the
problem, return to Step 2 and try to connect again.
STEP 3: INSTALLING YOUR FILTERSCAN WiFi Air Filter Monitor
Although not necessary, it is suggested that a licensed technician perform the installation.
WARNING! READ AND UNDERSTAND ALL INSTRUCTIONS. Failure to follow all instructions may
result in electrical shock and/or serious personal injury.
With the cover still off, locate the monitor on the RETURN air plenum of your central air conditioning
system or forced-air furnace. Use a pencil or other non-metallic object to press the Send button on the
printed circuit board. See the diagram above for the button’s location. The WPS Status Indicator will
begin to blink green, then amber. If it goes off without blinking red, the monitor is able to communicate
with your router from that location and you can install the monitor there.
However, if the WPS Status Indicator blinks red before going off, the signal between the monitor and
router is too weak. You need to move your router so that either they are closer together or there are
fewer obstructions (walls, ceilings, etc.) between them. You can also try rotating your router so that a
different side faces in the direction of the monitor. After making these adjustments, press the Send
button again and see if you can get the monitor and router to successfully communicate with each
other. If none of these adjustments work, your remaining option is to add a WiFi router “repeater” or
“range extender” to your home WiFi network. These devices are placed between your router and the
monitor and “boost” the signal between them. We strongly recommend you get one with a WPS button.
Once you install it, repeat Steps 2 and 3, treating the range extender as if it were your router.
Consult the Read This First document and determine whether you are going to mount the monitor
upstream or downstream of the air filter. Set the Upstream/Downstream switch to ON for downstream
mounting or OFF for upstream mounting.
WARNING! Ensure that the HVAC system blower motor/fan is turned OFF until instructed otherwise!
Locate a spot on the RETURN side of your central heating and cooling system – preferably between
the air filter and the system blower – that is large enough for you to place the monitor template on a flat
surface and is free of obstacles inside the duct. NOTE: The minimum distance for positioning the
FILTERSCAN
®
WiFi Air Filter Monitor from the air filter is six (6) inches. And, there should be at least
6” of clearance from the surrounding walls and from any other components of the system.
Tape the monitor template on the system such that "TOP" is facing upward. Drill one 3/8" hole for the
sensor and four 7/64" holes for the mounting screws. Use care when drilling to insure no internal parts
are damaged by the drill.
Place the monitor over the holes and align its sensor tube with the larger hole. Attach the Housing to
the air plenum using the mounting screws supplied. Note the sensor tube does not extend into the duct.
Replace the front cover on the monitor.
STEP 4: CALIBRATE YOUR MONITOR
Install a clean, new air filter into your heating and cooling system.
Depress the ZERO/CLEAN button ONCE. The STATUS LED will blink amber for approximately one
minute while the monitor records the system’s FAN OFF condition, then turn to blinking green. This
indicates proper operation and that you are ready to move to the next step. If the unit detects air flowing