7
ESW4 Closed Circuit Coolers
3-Section Shipments
In some cases, a unit is shipped in 3 sections (Fan, Casing and
Basin) in lieu of the standard 2 sections (Fan + Casing, and Basin).
This is often done to reduce the shipping height of each individual
section, which in turn may reduce the size of the crane required to
rig the unit.
Casing Section Rigging
All casing sections will be rigged as a four-point lift as shown in
Figure 9a.
H
L
LIFTING EAR
SPREADER BAR
Section
Minimum "H"
Length
Dimension
14' (4.2m)
14' (4.2m)
Table 4
– Minimum “H” Dimension for
Four-Point Lift of Cooler Casing Sections
Figure 9a
– Four-Point Rigging of Tower Casing
Section with Added Lifting Ears
H
“U” BOLTS
LIFTING
EAR
L
Fan Section Rigging
When lifting the fan section separate from the casing section, the center of gravity of the fan section is heavily biased towards the
location of the fan motor and major drive components. In order to avoid lifting the fan section at a lopsided angle, a three-point lift is
necessary.
In such a case, an additional lifting ear is provided by the factory on the mechanical bearing support assembly. The “U” bolts on the
fan deck which are located close to the fan motor are removed.
Figure 10 shows the proper three-point lifting method for the fan section. The hook of the crane must be a minimum dimension “H”
above the top of the section being lifted to prevent undue strain on the “U” bolts.
See Table 5 below for minimum “H” dimension to safely lift the fan section during a three-point lift.
Figure 10
– Three-Point Lift
Section
Minimum "H"
Minimum "H"
Length
Standard Fan
Dimension SLSF
14' (4.2m)
13' (4m)
13' (4m)
Table 5
– Minimum “H” Dimension for Three-Point Lifts
