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Rigging
A Rigging illustration and Center-of-Gravity dimensional
data table is shown in Figure 3. Refer to the typical unit op-
erating weights table before proceeding.
1. Rig the condensing unit as shown in Figure 3. Attach ad-
equate strength lifting slings to all four lifting brackets in
the unit base rail. Do not use cables, chains, or slings ex-
cept as shown.
2. Install spreader bars, as shown in Figure 3, to protect the
unit and to facilitate a uniform lift. The minimum distance
between the lifting hook and the top of the unit should be
7 feet.
3. Test-lift the unit to ensure it is properly rigged and bal-
anced, make any necessary rigging adjustments.
4. Lift the unit and position it into place.
Unit Isolation
To minimize unit sound and vibration transmission, one of
the following installation methods should be used:
1. Install the unit directly on an isolated (detached) concrete
pad or on isolated concrete footings located at each unit
load point.
2. Install the optional neoprene or spring isolators at each
mounting location. Refer to the following "Neoprene iso-
lators" or "Spring Isolator" section.
Neoprene Isolators
Install the neoprene isolators at each unit mounting (load)
point, using the following procedure:
1. Elevate the unit (one side at a time) to allow access to
the base rail mounting holes.
WARNING
Isolator Installation!
Use solid type blocks, i.e. 4" X 4" wood blocks or similar
material to prevent collapsing. Keep hands and other body
limbs clear of elevated base rail while installing isolators to
prevent personal injury.
2. Align the mounting holes in the base rail of the unit with
the holes in the top of the appropriate isolator. Refer to
Figure 4 for the appropriate isolator for each load point.
3. Install a 1/2" NC bolt (field supplied) through the base rail
of the unit into the threaded bolt hole of the isolator. Po-
sition the isolator to allow access to the mounting holes
in the base of the isolator, then tighten securely.
4. Lower the unit and isolator onto the mounting surface.
The maximum isolator deflection should be approxi-
mately 1/4 inch.
5. Secure the isolator to the mounting surface using the
base holes in the isolator.
Installation
6. Level the unit carefully. Refer to the "Leveling the Unit"
section.
7. After the unit is level, tighten the isolator base mounting
bolts to secure them to the mounting surface.
Spring Isolators
Install the spring isolators at each unit mounting (load) point
using the following procedure:
1. Elevate the unit (one side at a time) to allow access to
the base rail mounting holes.
WARNING
Isolator Installation!
Use solid type blocks, i.e. 4" X 4" wood blocks or similar
material to prevent collapsing. Keep hands and other body
limbs clear of elevated base rail while installing isolators to
prevent personal injury.
2. Align the mounting holes in the base rail of the unit with
the positioning pin in the top of the appropriate isolator.
Refer to Figure 5 for the appropriate isolator for each
load point.
3. Position the isolator to allow access to the mounting
holes in the base of the isolator.
4. Lower the unit onto the isolator. The positioning pin on
the isolator must engage into the hole of the base rail.
The clearance between the upper and lower isolator
housings should be approximately 1/4 to 1/2 inch. Refer
to Figure 5. A clearance greater than 1/2 inch indicates
that shims are required to level the unit. Refer to the
"Leveling the Unit" section.
5. Make minor clearance adjustments by turning the isolator
leveling bolt (Figure 5) clockwise to increase the clear-
ance and counterclockwise to decrease the clearance. If
proper isolator clearance cannot be obtained by turning
the leveling bolt, level the isolators themselves. A 1/4
inch variance in elevation is acceptable.
6. Secure the isolator to the mounting surface using the
base holes in the isolator.
7. After the unit is level, tighten the isolator base mounting
bolts to secure them to the mounting surface.
Leveling the Unit
Before tightening the mounting bolts, level the unit carefully.
Use the unit base rail as a reference. Level the unit to within
1/4 inch over its entire length. Use shims if non-adjustable
isolators (neoprene) are used.
If adjustable isolators (spring) are used, ensure that the
proper isolator housing clearance is maintained while level-
ing the unit. Isolators are identified by color and/or an isola-
tor part number. Shims under the isolators may be required
if the unit can not be leveled using the isolator leveling bolt.
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