Trane Precedent YHJ072A Installation, Operation And Maintenance Manual page 31

Figure 35. View for base to roof curb alignment on
C.0 cabinet on a 50" x 84" roof curb
Base Alignment Bracket
Figure 36. View for base to roof curb alignment on
C.0 cabinet on a 60" x 84" roof curb
If a Curb Accessory Kit is not used:
• The ductwork can be attached directly to the factory-
provided flanges around the unit's supply and return air
openings. Be sure to use flexible duct connections at
the unit.
• For "built-up" curbs supplied by others, gaskets must
be installed around the curb perimeter flange and the
supply and return air opening flanges.
Rigging
WARNING
Heavy Object!
Failure to follow instructions below could result in
unit dropping which could result in death or serious
injury, and equipment or property-only damage.
Ensure that all the lifting equipment used is properly
rated for the weight of the unit being lifted. Each of the
cables (chains or slings), hooks, and shackles used to
lift the unit must be capable of supporting the entire
weight of the unit. Lifting cables (chains or slings)
may not be of the same length. Adjust as necessary
for even unit lift.
See Dimensions and Weights section for rigging
illustration, and center-of-gravity dimensional data. Refer to
the typical unit operating weights table before proceeding.
RT-SVX075A-EN
1. Confirm unit does not need additional moves by fork lift.
2. Prepare unit for rigging as follows:
• 6 to 12.5 ton units: Remove all drill screws
fastening wood protection to metal base rail.
Remove all screws securing wooden protection to
wooden top crate.
• 15 to 25 ton units: Remove the front base rail
bumper protection.
Note: For unit protection, the top crate should remain in
place during lifting. If it must be removed prior to
lifting, protect unit from damage. Top crate must
be removed prior to operation.
WARNING
Improper Unit Lift!
Failure to properly lift unit in a LEVEL position could
result in unit dropping and possibly crushing
operator/technician which could result in death or
serious injury, and equipment or property-only
damage.
Test lift unit approximately 24 inches (61 cm) to verify
proper center of gravity lift point. To avoid dropping of
unit, reposition lifting point if unit is not level.
3. Rig the unit as shown in the weights section. Attach
adequate strength lifting slings to all four lifting brackets
in the unit base rail. Do not use cables, chains, or slings
except as shown.
4. Install a lifting bar, as shown in the Dimensions and
Weights chapter, 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.
5. Test-lift the unit to ensure it is properly rigged and
balanced, make any necessary rigging adjustments.
Figure 37. Fork pockets — 6 to10 ton high efficiency
units
Installation
31