Fan Installation - Fantech RVF 4XL Installation Manual

5

Fan installation

Step 1
When selecting the fan mounting location, the following criteria should be considered: a) type of
application; b) proximity to fresh air intakes; c) sound created by fan operation.
a) For dryer boosting applications, fan must be mounted a minimum of 12 linear feet from the
dryer outlet. If the fan is mounted closer than the recommended 12 feet, it will develop enough
pressure to pull wet lint through the duct system causing buildup on the impeller and clogging
of the vents in the discharge cover.
To prevent the possibility of fire hazards when using a booster fan in conjunction with a
gas fired dryer, booster fan flow must not exceed the dryer fan capacity. Typical
resident dryer fans produce 160 cfm.
For range venting applications, sufficient access for periodic cleaning of exhausted grease from
the wall and fan discharge cover should be provided.
In order to minimize operational noise, only the RVF4 should be used for direct,
through-the-wall, systems. The larger units (RVF4XL,RVF8XL) should only be used in
conjunction with ducted systems.
b) With any exhaust system, the fan should be located a minimum of 6 feet horizontally and 8 feet
vertically from any fresh air intakes for HVAC systems, heat recovery systems, etc. to prevent
re-entrainment of exhaust air streams. Windows that are frequently opened during moderate
seasons may also be considered fresh air intakes.
c) Although system noise at the point of exhaust will be virtually silent, windows and other
structural openings may be sources for noise entry during fan operation. Proximity to windows
and openings should be considered.
Select the location on the exterior wall where the fan is to be mounted. Make a hole through the
wall that is 1/2" larger than the diameter of the fan duct connection collar. A short piece of rigid
duct (not included) approximately 2" longer than the wall thickness is recommended for use as an
extension through the wall.
Step 2
Remove the four screws securing the white fan discharge cover and remove the cover. Place the
fan against the wall, as centered as possible on the wall opening, then mark the location of the
four backplate mounting holes and the electrical knockout. Drill a hole for the electrical service
that is 1/8" larger than the size of conduit to be used. A 1" diameter electrical service opening is
provided on the fan backplate (see dimensional drawing on Page 1). When mounting the fan on a
masonry wall, drill 7/32" holes for the four anchors and mounting screws (provided). Tap the
anchors flush into the holes. When mounting the fan on a wood surface, wood screws should be
used.
If the fan is to be mounted on a wall surface which is Lapped Siding, a mounting frame
made from 1x1 board may be necessary for a flush fit (see I-2).
Step 3
Before mounting the fan, bring the electrical supply through the wall. Attach the extension collar
to the fan duct connection collar. The connection should be as air tight as possible to prevent
leakage from the wall cavity. Apply a generous amount of polyurethane caulk to the exterior side of
the fan housing backplate (except the bottom so that water that leaked in can drain back out).
This will ensure an airtight/waterproof connection between the fan and the wall surface. If a
mounting frame is used in conjunction with lapped siding, be certain to apply a generous amount
of caulk between the frame and the wall as well as the fan backplate and the frame. Mount the fan
to the wall.
Be certain to make an airtight seal around all interior wall penetrations before
attaching duct work.
Optional Standard Fange
Extension Collar
through wall
Masonry Wall
Figure 1
Extension Collar
Lapped Siding
Wall
Figure 2
For use with DB10 Pressure Switch
See DB10 Pressure Switch
installation manual for complete
installation instructions
I
DB10
Pressure Tube
P
Pressure tube inserted 1/4"
E
G
into drilled hole in dryer duct before elbow
tube must be sealed with grommet to
prevent leakage
Figure 3
5
Discharge
Cover
Mounting
Screws
Mounting
I
Frame
P
E
G
Electrical Box
(Not included)
RVF4XL
Exterior Fan