Roof Curb or Base
Price AW-I units can be installed on a concrete housekeeping
pad, sleepers or a roof curb. The entire perimeter base and
frame structure must be continuously supported with either
field supplied sleepers or structural steel. Make sure that the
sleepers or structural steel supports are the correct dimensions
for the unit and that it is flat and level.
NOTICE - CONTINUOUS STRUCTURAL SUPPORT REQUIREMENT:
The unit is designed to have continuous structural
support around its entire perimeter. Failure to provide
continuous structural support will damage the unit and
void the warranty.
Check that the housekeeping pad is the correct dimensions for
the unit and that it is flat and level. Check that there is enough
trapping height and that a floor drain is nearby where the
furnace condensate drain will be located.
Generally the curb is shipped in advance of the unit delivery.
It should be installed along with any required ductwork prior
to unit installation. Where a roof curb has been supplied
in knocked-down condition, absolute care must be taken
to make sure that all corners are square, and that finished
dimensions exactly match those provided on the drawings. If
this is not done, problems could arise with the seal of the unit
to the curb.
Check diagonal dimensions prior to securing the curb to
ensure that dimensional integrity has been maintained during
shipping. Shim the curb to the deck as required and complete
roofing in accordance with accepted roofing practices.
Prior to the installation of the unit, check that the curb is the
correct dimensions for the unit and that the curb profile is
correct (this is especially important if the curb is not supplied
by Price Industries). Check that the curb is both level and
square. Curb ductwork that passes down through the
curb must be installed by installing contractor prior to unit
placement. Gasketing or other forms of sealant must be used
around the curb perimeter and at the duct connections. When
the curb is supplied by Price Industries, a neoprene gasket is
included. Prior to the installation of the unit, secure the gasket
to the mating surface of the curb by peeling the backing off the
gasket material and applying adhesive-side down.
CURB INSTALLATION DETAIL
NOTE:
To minimize sound transmission, only cut openings in
roof deck for ductwork penetrations. Do not cut out the entire
roof deck within in the curb perimeter.
If the unit is elevated, a field constructed cat walk around the
unit is strongly recommended to provide access for service.
4
AW-I
INSTALLATION INSTRUCTIONS
AW-I - Manual
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