FR Series Fan and balancing damper.
Balancing Damper
Wye with balancing damper.
When installing a DLX kit, a balancing damper has been included to allow for adjustment
of the system. The damper may be used where the grills will be connected using branches
of unequal length or where the flow will need to be balanced for any reason.
To Install The Damper:
1. The Damper must be installed on the branch with the least restriction.
This is generally the duct that is shortest or has the fewest bends.
2. Drill a
⁵₁₆
″
hole approximately
1¹₂
″
from the edge on the flat side of the wye.
3. Place the washer over the threaded shaft on the damper.
4. Insert the damper, shaft first, into the hole just drilled.
5. Attach the handle using the wing nut.
6. Adjust the damper to balance airflow and tighten the wing nut to secure.
Flexible Duct Installation Hints
Flexible insulated duct is strongly recommended where allowed by local code for bath-
room exhaust applications, where ducting passes through unconditioned space or where
noise is a factor. Failure to use insulation could result in excessive condensation buildup
within the duct, and undesirable sound levels within the room. For the quietest possible
installations, Fantech recommends a minimum of 8' of insulated flexduct between any
exhaust grill and fan. When using flexible type duct work, duct should be stretched as
tight and straight as possible. Failure to do so could result in dramatic loss of system per-
formance. Flexible duct should be connected to the fan with CB type clamps or duct tape.
All connections should be as airtight as possible to maximize system performance.
Installing DG Supply/Exhaust Grill
Side view grill and collar.
Mount Collar
Installing DG Supply/Exhaust Grill
If a Vent/Light combination kit is purchased, the VLC vent/lights are supplied with a sepa-
rate installation instruction replacing steps 1 through 4.
1. Select the grill mounting point within the area to be ventilated. To ease installation,
locations of framing beams within the walls or joists supporting the ceiling should be
considered. Collar/damper is provided with a perforated hanging strap for attachment
directly to a beam or joist. Allow sufficient space between the collar/damper and the
beam to attach the duct work. If the location of the grill does not allow direct attach-
ment, a cross-member mounted to the framing should be used.
2. Place the mounting collar/damper in the selected location and trace a circle onto the
surface. From the interior side of the room, cut through the surface. Please note: In
order to assure a smoother finish when mounting through a sheetrock or tile type ceil-
ing, it is recommended that a razor knife be used to make the cut.
3. From within the attic or crawl space, place the mounting collar into the hole until the
edge of the collar is flush with the interior wall or ceiling surface. Attach collar to the
support beam with the 2" wood screws provided. Attach duct work. Secure using CB
or FC clamps and/or duct tape. When installing the damper into rigid type ducting, FC
clamps or duct tape should be used.
PLEASE NOTE:
When attaching flex duct to the collar/damper combination and an
immediate elbow is necessary, be certain that the elbow is installed with a "soft" bend
to allow damper blades to operate properly.
4. Snap the grill into the mounting collar/damper. Grill should be pushed tightly into
place for an airtight fit. If there is a gap between the collar and the ceiling it should be
caulked to avoid air leakage. For subsequent cleaning the grill can be pulled out and
cleaned.
Fantech “Your Ventilation Solutions Company”
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