Trane INTELLIPAK ™ ™ ™ ™ ™ Commercial Single-Zone Rooftop Air Conditioners with CV or VAV Control - Manual (Page 24)

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Installation (Continued)
Note: If a “built-up” curb is provided by others,
keep in mind that these commercial rooftop units
do not have base pans in the condenser section.
Note: If this is a REPLACEMENT UNIT keep in mind
that the CURRENT DESIGN commerical rooftop
unitsdo not have base pans in the condenser
section.
Unit Rigging & Placement
WARNING
Heavy Objects!
Do not use cables (chains or slings) except as shown.
Each of the cables (chains or slings) 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.
Other lifting arrangements may cause equipment or
property-only damage. Failure to properly lift unit may
result in death or serious injury. See details below.
Note: Use spreader bars as shown in the diagram.
Refer to the Installation manual or nameplate for
the unit weight.Refer to the Installation Instructions
located inside the side control panel for further
rigging information.
1. A Center-of-Gravity illustration and the dimensional data
is shown in Figure 3-3.
2. Attach adequate strength lifting slings to all four lifting
lugs on 20 through 75 Ton units and to all six lifting lugs
on 90 through 130 Ton units. The minimum distance be-
tween the lifting hook and the top of the unit should be 7
feet for 20 through 75 Ton units and 12 feet for 90
through 130 Ton units. Figure 3-4 illustrates the installa-
tion of spreader bars to protect the unit and to facilitate a
uniform lift. Table 3-3 list the typical unit operating
weights.
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 over the curb and pedestal.
(These units have a continuous base rail around the air
handler section which matches the curb.
5. Align the base rail of the unit’s air handler section with
the curb rail while lowering the unit onto the curb. Make
sure that the gasket on the curb is not damaged while
positioning the unit. (The pedestal simply supports the
unit’s condenser section)
A cross section of the juncture between the unit and the
roof curb is shown in Figure 3-5.
Trane's Engineering Bulletin RT-EB-80 provides additional
information concerning duct design and sound reduction.
Pitch Pocket Location
The location of the main supply power entry for S_HF 20
through 75 Ton rooftop units is located at the bottom right-
hand corner of the control panel. Figures 3-2A, B & C illus-
trate the location for the electrical entrance through the
base in order to enter the control panel. If the power supply
conduit penetrates the building’s roof beneath this opening,
it is recommended that a pitch pocket be installed before
the unit is placed onto the roof curb. The center line dimen-
sions shown in the illustration below indicates the center
line of the electrical access hole in the unit base when it is
positioned on the curb, ±3/8 inch. The actual diameter of
the hole in the roof should be at least 1/2 inch larger than
the diameter of the conduit penetrating the roof. This will al-
low for the clearance variable between the roof curb rail and
the unit base rail illustrated in Figure 3-5.
The pitch pocket dimensions listed are recommended to en-
hance the application of roofing pitch after the unit is set
into place. The pitch pocket may need to be shifted as illus-
trated to prevent interference with the curb pedestal.
Unit Tonnage “A” Dimension "B" Dimension
S*HF 20, 25 & 30 4' 5-9/16" 5-9/16"
S*HF 50 & 55 9' 5-11/16" 5-1/2"
S*HF 40, 60, 70 & 75 6' 9-5/8" 7-3/16"
* = All unit functions (SAHF, SEHF, SFHF, SSHF, SLHF and SXHF)
If a Trane Curb Accessory Kit is not used:
a. 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.
b. For “built-up” curbs supplied by others, gaskets must
be installed around the curb perimeter flange and the
supply and return air opening flanges.