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Air Inlet Hood and Ducts:
Air Inlet Hood and Ducts:
The ducting from this fan to the outside of the building has a strong eff ect on the air fl ow, noise, and energy use of
the fan. Use the shortest straightest duct routing possible for best performance and avoid installing the fan with
smaller ducts than recommended. Insulation around the ducts can reduce energy loss and inhibit mold growth.
Fans installed with existing ducts may not achieve their rated airfl ow.
An air inlet (intake hood or termination) with an insect screen (max. ¼" mesh size recommended) and minimum 6"
outlet duct connection is required, although larger hoods may be used with a reducer to connect with the inlet air
duct. The inlet and outlet air ducts must be insulated (check code requirements) and be minimum 6" diameter or
equivalent size. Rigid smooth-walled pipe is recommended, although fl ex duct may be used if installed for minimum
pressure drop. Larger size duct/pipe may be used to further reduce pressure drop and increase fan performance if
desired, with a reduction to 6" diameter at the FAPV.
If the outlet duct is to be connected to the return ducting of the HVAC system and the FAPV is set up for
intermittent ventilation, installation of a 24 VAC powered air damper such as the Field Controls model FAD-6 is
strongly recommended to prevent incoming air fl ow during periods when the HVAC fan is active but the FAPV is not
active. See wiring diagrams for wiring connection of the FAD to the FAPV and ventilation controller.
INSTALLATION OF FAPV VENTILATOR
CAUTION: DISCONNECT ELECTRICAL POWER BEFORE BEGINNING INSTALLATION.
CAUTION: DISCONNECT ELECTRICAL POWER BEFORE BEGINNING INSTALLATION.
1.
Review the Planning for Installation section of these instructions and choose a location for securing
the FAPV to the mounting surface. The FAPV ventilator fan unit may be mounted in any position that
allows access to both removable panels for service and maintenance.
2.
The FAPV is of rugged construction and requires adequate support for mounting. Install 2x4
bridging or min. ¾" thick plywood platform if required for secure mounting; see Figure 2.
3.
Attach the mounting brackets to the FAPV fan unit in any of the opposing positions shown in Figure
1, using the supplied #10 blunt-tipped sheet metal screws. The brackets must either be on opposite
sides or opposite ends of the FAPV fan unit for secure mounting.
WARNING: DO NOT USE INSTALLER-SUPPLIED
WARNING: DO NOT USE INSTALLER-SUPPLIED
SCREWS TO ATTACH THE MOUNTING BRACKETS TO
SCREWS TO ATTACH THE MOUNTING BRACKETS TO
THE FAPV. An electrical hazard may result, possibly
THE FAPV. An electrical hazard may result, possibly
causing bodily injury, fi re hazard, and/or equipment
causing bodily injury, fi re hazard, and/or equipment
damage. The use of longer and/or sharp-pointed
damage. The use of longer and/or sharp-pointed
screws may cause damage to electrical wiring and/
screws may cause damage to electrical wiring and/
or components inside the FAPV fan unit. Con-
or components inside the FAPV fan unit. Con-
tact Field Controls Technical Support for instruc-
tact Field Controls Technical Support for instruc-
tion if alternate fastening methods must be used.
tion if alternate fastening methods must be used.
4.
Mount the FAPV fan unit securely onto
the mounting surface, wall studs, joists,
rafters or trusses using appropriate
fasteners, See Figure 2. Do not fasten
to drywall or thin paneling alone.
WARNING: Use extreme caution to avoid contact with
WARNING: Use extreme caution to avoid contact with
or damage to plumbing, electrical wiring, or other
or damage to plumbing, electrical wiring, or other
objects that may be hidden behind the mounting
objects that may be hidden behind the mounting
surface when cutting, drilling or installing hardware!
surface when cutting, drilling or installing hardware!
NOTE: The FAPV fan unit may also be hanger bar mounted, using a minimum of 4 x 3/8" threaded rod using
appropriate mounting hardware (rod and hardware not included); seeHanger Bar Mounting, Figure 3.
Figure 1 - TYPICAL BRACKET MOUNTING POSITIONS
page 5 of 20
P/N 780104900 Rev A 09/20
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