Installation Manual

BX-SVN-JAYCURB001-1A-EN 3
Installer's Guide
Installation Instructions
These instructions are organized for an easy step-by
step procedure.
NOTE: These instructions do not purport to cover all
variations in system nor to provide for every possible
contingency to be met in connection with the installation.
Should further information be desired or should particular
problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to
the manufacturer.
1. Adequate support must be provided beneath the
roof mounting curb for the entire length of the curb.
The total weight of the unit, curb, and duct, plus any
accessories must be considered when selecting and
placing the curb on the roof.
2. Be sure location of the roof mounting curb will allow
needed service clearance around unit when the unit
is in place. See Figure 2.
NOTE: The roof mounting curb (frame) not only provides
support for the unit, but permits easy penetration of the
roof for the connecting ductwork. The roof mounting
curb provides for proper flashing and sealing by the
roofing contractor as approved by the National Roofing
Contractors Association.
3. Roof Mounting Curb (frame) must be installed on a
flat, level section of the roof (maximum of 1/4” per
foot pitch), providing a level mounting surface for the
unit, even though the roof is not level. If the pitch of
the roof exceeds 1/4” per foot, it will be necessary
for the contractor to construct a subbase on which to
install the roof mounting curb level.
4. Do not locate the mounting curb near exhaust vents
or other sources of contaminated air that could
enter the unit air inlets. Although unit is water proof,
guard against water run off from higher overhanging
structures.
5. Field Fabricated Ductwork – Secure all ducts to
building structure. Use flexible duct connectors
between curb and ducts.
Ducts passing thru unconditioned space must be
insulated and covered with a vapor barrier.
Figure 1. Typical Roofcurb Installation
ROOF INSULATION
ROOF MOUNTING
CURB
ROOF DECK
FIELD SUPPLIED
RIGID INSULATION
FIELD SUPPLIED
CANT STRIP
ROOFING
FIELD SUPPLIED
SUPPORTS AT EACH
END OF CURB