Field Controls FAPV180-AC Manual page 15

AIR FLOWRATE ADJUSTMENT PROCEDURE
1. Restore power and turn on the electrical disconnect switch if installed.
2. If the FAPV ventilator outlet is connected to the HVAC ductwork, set the indoor thermostat to a
setting resulting in operation of the HVAC circulation fan.
3. Adjust the FAPV fan unit speed control knob to the Max setting (fully counterclockwise without
turning to OFF position). Note that the FAPV fan unit may be turned off to prevent fan operation, but
the FAPV fan unit will remain energized by 115 VAC.
4. Take air fl ow readings by the methods described above and adjust the FAPV speed control knob
until the desired air fl owrate or inlet collar static pressure is obtained. Turn the knob to the right
(clockwise) to decrease the fl owrate. NOTE: The FAPV speed control has a minimum fan speed
adjustment screw that may be adjusted if desired. Remove the Electrical Access Cover and access the
adjustment screw by inserting a very small Phillips screwdriver through the hole behind the small
circle at the 4 o'clock position on the speed scale label (see Figure 8).
TIP: Use a ballpoint pen or permanent marker to make
a mark on the speed scale of the FAPV label beside
the pointer on the speed control knob, and write
the measured fl owrate in cfm on the label, for
future reference.
5. If removed, replace the test port plug on
the inlet collar of the FAPV, and pull the
duct insulation up over the entire collar
and seal to prevent condensation in the
ducts.
MAINTENANCE AND FILTER INSTALLATION:
CLEANING AND REPLACEMENT
WARNING: DISCONNECT POWER TO THE FAPV FAN UNIT BEFORE SERVICING OR REMOVING ACCESS PANELS WARNING: DISCONNECT POWER TO THE FAPV FAN UNIT BEFORE SERVICING OR REMOVING ACCESS PANELS
FROM THE FAPV FAN UNIT. FROM THE FAPV FAN UNIT.
• The FAPV fan unit has a motorized impeller that has sealed and permanently-lubricated ball bearings;
no maintenance or lubrication of the motor is required.
• The FAPV fan unit also includes a washable 1" thick self-supporting prefi lter, and a slot for installation of a
user-supplied 10 x 10 x 2" standard-size pleated fi lter if desired, in addition to the factory-installed
prefi lter. The prefi lter should be inspected and cleaned 3 months after initial installation. The
regular cleaning period may then be extended to up to every 6 months, depending on how much
dirt, dust and other matter has accumulated on the fi lter.
WARNING: All air fi lters installed in the FAPV Power Ventilator must be certifi ed and marked for compliance to WARNING: All air fi lters installed in the FAPV Power Ventilator must be certifi ed and marked for compliance to
UL 900 Standard for Air Filter Units. Use of an uncertifi ed air fi lter may result in a fi re and/or smoke UL 900 Standard for Air Filter Units. Use of an uncertifi ed air fi lter may result in a fi re and/or smoke
hazard. hazard.
• If installed, a user-supplied 10" x 10" x 2" air fi lter should be replaced at regular intervals as
recommended by the manufacturer.
• Clean and inspect the insect screen in the air intake hood at least every 6 months, and ensure the
area around the intake hood remains free of excessive leaf litter, debris, and any sources of air
contamination. Inspect the caulking or sealant and fl ashing around the hood and repair as necessary.
WARNING: Use care when inspecting and/or cleaning the air intake hood. Wasps, bees, or hornets etc. may WARNING: Use care when inspecting and/or cleaning the air intake hood. Wasps, bees, or hor
sometimes nest inside protected areas such as the external part of the hood. sometimes nest inside protected areas such as the external part of the hood.
Figure 8, SPEED CONTROL SCALE LABEL DETAIL
page 15 of 20
nets etc. may
P/N 780104900 Rev A 09/20