Fan Installation - Fantech RVF4 Installation Instructions Manual

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 clog-
ging of the vents in the discharge cover. Important Notice: 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.
NOTE: 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 mount-
ing 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 elec-
trical 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"
Optional Standard Flange
Extension Collar
through wall
Masonry Wall
I-1
Discharge Cover
Mounting Screws
Extension Collar
Lapped Siding
Wall
I-2
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.
NOTE: 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 connec-
tion 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 con-
junction 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.
Note: Be certain to make an airtight seal around all interior wall penetra-
tions before attaching duct work.
FINAL INSTALLATION NOTE:
If the fan is being mounted in a location where it is not protected by an
eve, it is highly recommended that a standard flashing be installed and
sealed against the wall and upper edge of the fan discharge cover to pre-
vent rain water running down the wall surface from entering the fan hous-
ing (see I-1).
DUCTING HINTS
a) Whenever the duct passes through an unconditioned space, it is rec-
ommended that insulated ducting be used. This will prevent the pos-
sibility of condensation building up both within the duct and on the
exterior duct wall, this is particularly true when the fan is used as bath-
room exhaust where high levels of moisture in the air stream is com-
mon.
b) Insulated flexible duct, as used for take-offs in residential heating and
air conditioning systems, is recommended. Since the fans are capable
of overcoming the higher resistance created by long duct runs and
flexible duct work, the system will not see an appreciable loss of per-
formance. However, when using flexible duct, it should be stretched as
straight and tight as possible to minimize losses.
c) When connecting duct work to the fan, grills, or transitional devices,
make as air tight a connection as possible to prevent leakage of mois-
ture, odors or other contaminants which are being exhausted.
For use with DB10 Pressure Switch
I
Mounting
Frame
PRESSURE
P ESSURE TUBE
TUBE
PRESSURE TUBE
INSERTED 1/4" INTO
P INSERTED 1/4" INTO
DRILLED HOLE IN DRYER DUCT BEFORE
DRYER DUCT BEFORE
E UST BE SEALED WITH
ELBOW TUBE MUST BE SEALED WITH
G EVENT LEAKAGE.
GROMMET TO PREVENT LEAKAGE.
DB10
DB10
ELECTRICAL BOX
(NOT INCLUDED)
RVF4XL EXTERIOR
RVF4XL EXTERIOR FAN
FAN
NOTE: See DB10 Pressure
Switch installation manual
for complete installation
instructions.
ELECTRICAL BOX
(NOT INCLUDED)