Trane Precedent WHJ150A Installation, Operation And Maintenance Manual page 22

Installation
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 14. Fork pockets — 12.5 to 25 ton standard
efficiency units
REMOVE SIX
FORK LIFT BRACKETS
REMOVE TWO
SHIPPING PROTECTIONS
6. Lift the unit enough to allow the removal of base fork
pocket protection components as shown in the
following figures.
7. Downflow units; align the base rail of the unit 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.
General Unit Requirements
The checklist listed below is a summary of the steps
required to successfully install a commercial unit. This
checklist is intended to acquaint the installing personnel
with what is required in the installation process. It does not
replace the detailed instructions called out in the applicable
sections of this manual.
• Check the unit for shipping damage and material
shortage; file a freight claim and notify appropriate
sales representative.
• Verify correct model, options and voltage from unit
nameplate.
• Verify that the installation location of the unit will
provide the required clearance for proper operation.
• Assemble and install the roof curb (if applicable). Refer
to the latest edition of the curb installers guide that
ships with each curb kit.
• Fabricate and install ductwork; secure ductwork to
curb.
• Install pitch pocket for power supply through building
roof. (If applicable)
• Rigging the unit.
• Set the unit onto the curb; check for levelness.
• Ensure unit-to-curb seal is tight and without buckles or
cracks.
22
REMOVE WOODEN BOARDS
• Install and connect a condensate drain line to the
evaporator drain connection.
Factory Installed Economizer
• Ensure the economizer has been pulled out into the
operating position. Refer to the economizer installers
guide for proper position and setup.
• Install all access panels.
Return Air Smoke Detector
The factory installed Return Air Smoke Detector is installed
in the downflow discharge position for 12.5 to 25 ton units.
No additional field setup is required.
If a unit is to be converted to horizontal discharge, for 12.5
to 25 ton units, the following conversion must be
performed:
1. If the unit has an economizer, it must be pulled out in
the operating position.
2. Remove the 2 screws from the mounting brackets.
Note: Refer to downflow view for screw locations of
12.5 to 25 ton units.
Figure 15. Downflow bracket installation (view from
horizontal return duct)
3. Lift the tube and bracket from the downflow duct
opening. Rotate the tube and bracket assembly 90
degrees ensuring that the holes on the aluminium
sensing tube face away from the unit and face the
return air ductwork.
Note: Refer to horizontal views below of the 12.5 to 25
ton units.
PKGP-SVX011A-EN