Duct Installation - Bottom Inlet; Side Or End; Stack Extensions; System Assembly - Greenheck Vektor-H Installation, Operation And Maintenance Manual

Duct Installation
Bottom Inlet Duct Connection
The end of the duct (customer-supplied) is secured
between the roof curb's top edge and the curb cap of
either the Vektor-H or bypass air plenum. If an isolation
damper is present in the roof curb, the duct is located
between the roof curb and the damper adapter tray.
Option 1: • No isolation damper in roof curb
• Bottom inlet on bypass air plenum
Duct
Option 2: • With isolation damper in roof curb
Duct
Duct Connection to Curb
Side or End Duct Connection
• Vektor-H or Vektor-HS
• With bypass air plenum
NOTE
Plenum is provided with removable side or end
panels, allowing the proper duct connection.
Duct flange and
gasketing by
others
Duct to Bypass Air Plenum

Stack Extensions

Systems with multiple stack extensions require all
sections assembled and installed on site between the
main fan body and the discharge cone. Each section
has guy wire attachment brackets located on the upper
end of each section. The order sections are installed
in are universal. Gasketing (3/16 x 1/2 inch with sticky
back) is provided and is to be installed between each
joining section.
Guy wires are required on system with multiple stack
extensions. Location of connections, wiring and
anchorage is determined by a structural engineer.
®
Vektor-H or Vektor-HS
Roof Curb
Vektor-H
Adapter Tray
Isolation Damper
Bypass Air
Plenum
Roof Curb

System Assembly

NOTE
When installing each section, be certain to rig each
section separately using the lifting lugs provided.
Gasket
Gasket
1. Mount roof curb to roof deck in accordance with
local codes.
2. Install 3/16-inch thick x 1/2-inch wide, closed-cell
gasket on the top edge of the curb, adhesive side
down (gasket provided). Leave no gaps between
gasket sections to ensure tight seal.
3. Place the bypass air plenum (BAP) onto the
previously installed gasket and secured roof curb.
If a BAP is not provided for the unit, skip to Step 5.
Pre-drill pilot holes into the roof curb and attach the
BAP to the roof curb with mounting hardware (by
others).
4. Install 3/16-inch thick x 1/2-inch wide, closed-cell
gasket on the top edge of BAP, adhesive side down
(gasket provided). Leave no gaps between gasket
sections to ensure a tight seal.
5. Place the curb cap of the fan housing onto the
gasket and BAP or onto roof curb if BAP is not
provided. Attach the curb cap using the provided
5/16-inch self-tapping screws. If a BAP is not
provided, pilot holes must be drilled into the roof
curb.
6. Install the final nozzle subassemblies as shown in the
submittal drawing. Align flange bolt holes and fasten
sections using the 316 stainless steel bolts, washers,
and lock washers provided.
7. Follow electrical connection and pre-start-up checks
as listed on pages 7 and 8.
Bolt and Washer
Detail
5/16 inch self-tapping screws
Gasket
5/16 inch self-tapping screws
Gasket
Laboratory Exhaust System 5