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Assembly and Installation (Vektor-M Compact)
Rooftop units require curbs to be mounted first. The duct connections must be located so they will be clear of
structural members of the building.
1. Assemble factory supplied roof curbs
Roof curbs are Model VKCURB, which are shipped knocked down and require field assembly (by others). See
Greenheck document number 475588 (VKCURB Curb Assembly Instructions) for ERS sizes 5, 8 and 15.
Sealing
After all sections have been assembled, caulk (supplied) all seam joints to provide final sealing of roof curb
sections. Follow caulk manufacturers recommendations for proper application.
2. Lift and install roof curb
Roof curb can be assembled at installation location on the roof deck or at ground level and lifted into position. To
lift from ground to roof deck, use spreader bar and support both end and center sections. Locate curb over roof
opening. Check that the diagonal dimensions are within ±1⁄8 inch of each other and adjust as necessary. Check
curb or structural supports for levelness. Both must be
level to ensure proper drainage from plenum and fan(s).
Shim as required to level. Attach curb to roof deck or
support structure as specified by structural engineer.
Attach supplied gasketing to top of curb.
3. Bypass air plenum installation
The bypass air plenum and energy recovery system (ERS) sections are delivered fully assembled. After BAP has
been lifted into position, plenum should be secured to roof curb. Refer to the submittal drawing for the orientation
of any bypass air plenum (BAP) dampers or air inlet locations. Bottom of the BAP has a removable skirt section
with pre-punched holes. These holes will align with holes and nutserts in the roof curb if the roof curb was
provided by same manufacturer. If the roof curb is from another supplier, use the holes in the skirt as a template.
Allow gasketing to compress before securing. When securing BAP to curb, install using moly-coated 316
stainless steel screws (provided) in all holes.
If BAP is not being mounted on a roof curb, it can be secured to either structural steel or concrete pad. Full
perimeter under BAP is required. Method used to secure the BAP to either structural support(s) or concrete pad
is determined by site or structural engineer. If BAP is welded to support structure, repair the area where coating
was burnt off. See coatings repair section of this manual for details involving touch-up of damaged surfaces.
Mounting the BAP to roof curbs from manufacturers other than Greenheck or not following proper mounting
instructions may impact fan performance and void warranty.
4. Fan rigging, lifting and installation
For installing the remainder of the fan system, refer to Greenheck document 464652 (Model Vektor-MH, Vektor-
MD and Vektor-MS Laboratory Exhaust System IOM).
Assembly and Installation (Vektor-M Standard)
Rooftop units require curbs to be mounted first. The duct connections must be located so they will be clear of
structural members of the building.
1. Assemble factory supplied roof curbs
Roof curbs are Model VKCURB, which are shipped
knocked down and require field assembly (by others).
Refer to Vektor ERS Fan Plenum Curb Assembly
Instructions, document number 474117, for additional
details for ERS sizes 20, 30, 40 and 60.
NOTE
Gasketing material (shipped with Vektor fan) should
be placed on the top edge of secured roof curb prior
to placing the Vektor bypass air plenum (BAP) and
ERS plenum cabinet on the curb.
Determine the placement of the plenum sections relative to each other. Please refer to the submittal drawing for the
orientation of any BAP dampers or air inlet locations.
6
Vektor-ERS Energy Recovery Plenum Laboratory Exhaust
NOTE
Gasketing material (shipped with Vektor fan) should
be placed on the top edge of secured roof curb prior
to placing the bypass air plenum (BAP) on the curb.
Curb section
for ERS plenum
cabinet
Curb section
for Vektor fan
bypass air
plenum
Gasketing material
(supplied) to be
attached to top edge
of all curb sections
®
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