6
© Copyright 2022. All rights reserved.
Table 2
FUSION
®
DIMENSIONS
SYSTEM
L
W
H
I
E
ZFL-2800
14' 8" (4.5 m)
7' 0" (2.1 m)
7' 10" (2.4 m)
6' 1" (1.9 m)
5' 7" (1.7 m)
ZFL-4000
15' 6" (4.7 m)
8' 0" (2.4 m)
8' 4" (2.5 m)
6' 7" (2.0 m)
6' 1" (1.9 m)
NUMBER OF ACCESS RISERS IN FUSION
®
SERIES
ZFL-2800
ZFL-4000
24" (61
cm
) D
iameter
4
4
Table 1
W
I
H
E
L
OUTLET
INLET
Figure 5- Dimensions
SK2888
1. Excavate an area large enough for the Fusion
®
Series unit to be installed. See Figure 5 and Table 2 for the actual dimensions of the
unit. In areas where high groundwater is not a concern, excavation dimensions are calculated by adding 12-18" (305-457 mm) to the
length and width of the Fusion
®
. This will allow sufficient room for proper backfilling. If it is reasonable to expect a seasonally high
water table, consult the Anti-Flotation Procedures section below.
2. Construct a 6" (152 mm) thick stone pad of either 1/4" - 1/2" (6-13 mm) diameter stone or concrete pad and level to within 1/8" (3 mm).
3.
If the unit is not level, it will cause uneven water flow as well as unbalanced aeration, which will result in
poor
performance.
4. Gently lift the unit at all four lifting points with a harness and install it on leveled stone pad (Figure 11).
5. Check unit to make certain it is level by placing a level at several locations on the riser. (riser covers removed) (Figure 11).
1.
If groundwater is present, anti-flotation measures must be
used to stabilize the unit prior to backfilling. Please follow the
procedures in the Anti-flotation section to properly anchor
the Fusion
®
.
2. Fill the unit with clean water to the normal operating depth prior
to backfilling. Partition walls between chambers are water
-tight
and will fill in succession beginning on the inlet side of the unit.
Therefore, it is best to alternate chambers when filling with
water so the unit remains level. Check for leakage around the
unit.
3. See riser instructions page 7. See Table 1 for number and size
of access openings. Riser extensions are available for deeper
burial. Make certain risers are sealed properly and watertight.
4. Install riser covers.
5.
Backfill with good quality granular soil around the unit that is
free of organic matter, rock, stone, tree roots, or other debris
that could damage the unit. Unit can be backfilled partially
before risers are installed to aid in riser installation.
6.
Tamp soil around perimeter of the unit as it is backfilled to
stabilize the unit and to reduce settling.
7.
Finalize backfill with a mounded contour so that surface
water
is shed away from the unit. Under no circumstances should
surface water be allowed to accumulate around unit.
8.
CAUTION
MAXIMUM soil burial depth over the unit is 36
inches (914 mm).
EXCAVATION AND INSTALLATION
BACKFILLING
COLD WEATHER INSTALLATION
When installing Fusion
®
in cold climates, the blower must be
protected from snow drifts by installing it either inside a garage,
home, basement, crawlspace or riser. If installed in a riser, the
blower must be protected from inundation and must have a vent
pipe installed to above the maximum snow depth with a 180
degree angle at the end to prevent snow and water entry. Also,
the top and sides of the Fusion
®
must be insulated with insulation
sheeting or other means to provide a minimum insulation value of
R-8, along with the risers and lids. Please contact the factory for
further information.
ANTI-FLOTATION PROCEDURES
It is necessary to anchor the Fusion
®
in high ground water
conditions to prevent flotation. If groundwater rises above the rock
or concrete pad that the Fusion
®
sits on, anchoring is required.
Please consult a design engineer, soil scientist or other qualified
individual to determine high groundwater conditions.
1. Follow the procedures outlined in the Excavation and
Installation Section items 1-5 to properly prepare and level the
Fusion
®
excavation.
2. Follow the procedures outlined in the Backfilling Section
items
1-
4 to properly fill the Fusio
n
®
with water and add risers if
needed.
3. Refer to Figure 12, Anchoring Schematic to determine the
minimum amount of backfill to be placed around the Fusio
n
®
in the excavation. Tamp the fill to prevent settling.
4. Refer to Table 3, Concrete Anchoring Dimensions to determine
the amount of concrete needed for the concrete anchor collar
that is poured around the entire circumference of the Fusion
®
.
Pour concrete to the specified dimensions to fully engage
the mid-seam of the Fusion
®
, which will anchor it once the
concrete cures. Make certain to pour the concrete in a manor
to minimize trapped air within the concrete. Agitating or lightly
mixing the concrete with a metal rod or other similar device
once poured will help release trapped air. Be careful not to
puncture or crack the unit.
5. Allow the concrete to harden before final backfilling.
6.
Complete the procedures outlined in the Backfilling Section,
items 5-8.
