Greenheck SEVCD-23 Installation Manual
Blade Seal Replacement
Note: Wipe down blade with Isopropyl Alcohol before seals are
applied to blades.
Note:
- Blade and closure strip must be cleaned with Isopropyl Alcohol to remove oil prior to application of seal to ensure complete adhesion.
- Apply seal to blade and closure with moderate pressure with a roller.
Blade seal
Instructions
for HCD, VCD, SMD, FSD, series
Greenheck offers three different blade styles and
uses four different attachment methods for control
damper blade seals. These instructions address either
replacement or initial installation.
3-V Blade Style
Applicable to Models: VCD-18, VCD-23, SEVCD-23,
SMD-201, SMD-202, FSD-211, FSD-212,FSD-231,
CFSD-211, CFSD-212, OFSD-211, OFSD-212,
SSFSD-211,SEFSD-211, HCD-120, HCD-220
Clip-On
The vinyl seal, also known as dual-durometer, pushes
onto the blade edge and is held by the friction between
the blade material and directional projections inside
the rigid plastic clip. Seal material is cut-to-length
before installing. Seal is normally installed to the
drive blade and to every blade tip on the same side of
damper.
Stainless Steel/Silicone Composite
Silicone rubber seal has a stainless steel clip to
mechanically fasten seal to the blade edge. Installation
is the same as the vinyl seal.
• Install when blade surface is above 70°F or above.
• Cut seal material slightly longer than blade with release
paper still on seal material.
• Start at one end of blade. Peel off 1-2 feet of release
paper at a time and place seal rmly onto blade surface.
Do NOT touch the adhesive. Use nger or roller to press
seal to blade. Do NOT stretch seal as it will pop off in
time.
• Trim seal material at blade end as required. Excess seal
is prone to pulling from blade surface and will force jamb
seal away, increasing leakage.
Silicone Seal with Silicone Adhesive
Tremco Spectrem 1 adhesive is used to adhere silicone
seal to painted surfaces, as PSA adhesives will not bond
to most powder painted surfaces.
• Open blades. Use scraper to remove any existing seal
or adhesive.
• Cut seal to approximate length with release material still
on seal.
• Clean blade in the same manner as above. Temperature
limits also apply.
• Apply thin 1/8 in. bead of Tremco Spectrem 1 to blade
surface. Spread adhesive using a putty knife or scraper
to approximately ½ in. (13 mm) wide.
• Install seal to blade edge, starting at one end and removing release paper as one moves down blade. Do
NOT stretch seal.
• Press seal rmly into place. If seal was stretched, length
will shrink.
• Allow adhesive material to cure 15 minutes. Trim seal to
length.
Fabricated Airfoil Blades
Applicable to models: VCD-33, VCD-34, SEVCD-33,
SMD-301,SMD-302, FSD-311, FSD-312, FSD-311V,
CFSD-311, CFSD-312, HCD-130, HCD-135, HCD-230,
HCD-330, HCD-430, HCD-530
Silicone or EPDM Seal with Pressure Sensitive
Adhesive (PSA)
• Open blades. Use scraper to remove any existing
seal or adhesive.
• Surface must be free from dust, dirt, oil and moisture.
Clean blade edge with alcohol or similar solvents.
Do not use mineral spirits or other petroleum based
solvents that leave a residue.
HCD Fabricated Airfoil with Silicone Seal
Silicone or EPDM Seal with Pressure Sensitive
Blade Seal
Blade Seal
Adhesive (PSA)
• Open blades. Use scraper to remove any existing seal or
adhesive.
• Surface must be free from dust, dirt, oil and moisture.
Clean blade edge with alcohol or similar solvents. Do
not use mineral spirits or other petroleum based solvents
that leave a residue.
• Install when blade surface is above 70°F or above.
• Cut seal material slightly longer than blade with release
paper still on seal material.
• Start at one end of blade. Peel off 1-2 feet of release
paper at a time and place seal rmly onto blade surface.
Do NOT touch the adhesive. Use nger or roller to press
seal to blade. Do NOT stretch seal as it will pop off in
time.
• Trim seal material at blade end as required. Excess seal
is prone to pulling from blade surface and will force jamb
seal away, increasing leakage.
Silicone Seal with Silicone Adhesive
Tremco Spectrem 1 adhesive is used to adhere silicone
seal to painted surfaces, as PSA adhesives will not bond to
most powder painted surfaces.
• Open blades. Use scraper to remove any existing seal or
adhesive.
• Cut seal to approximate length with release material still
on seal.
• Clean blade in the same manner as above. Temperature
limits also apply.
• Apply thin 1/8 in. bead of Tremco Spectrem 1 to blade
surface. Spread adhesive using a putty knife or scraper
to approximately ½ in. (13 mm) wide.
• Install seal to blade edge, starting at one end and
removing release paper as one moves down blade. Do
NOT stretch seal.
• Press seal rmly into place. If seal was stretched,
length will shrink.
• Allow adhesive material to cure 15 minutes. Trim seal
to length.
SS/Silicone Composite
Silicone rubber seal has a stainless steel clip to
mechanically fasten seal to the blade edge. Seal
material is cut-to-length before installing. Seal is
normally installed to the drive blade and to every blade
tip on the same side of damper.
Aluminum Airfoil Blades
Applicable to models: VCD-40, VCD-42, VCD-43,
SMD-401, ICD-45, HCD-140, HCD-240, HSD-401
Extruded aluminum blades have a groove at both blade
edges to hold seal. Blade ends are crimped to prevent
seal from sliding out.
• Open blades. Remove existing seal. It is usually
easiest to pull seal from blade end rather than pulling
it out of groove along blade edge.
• Cut seal slightly longer than blade length. Do NOT
stretch, as seal will creep back to original length.
• Start at one blade end. The non-attached seal
lip is installed away from the blade surface. Seal
can usually be stretched sufciently to pass under
existing blade end crimp. Needle nose pliers works
well in grasping seal end.
• Use a center punch to re-crimp blade end if
necessary.
• Trim seal to length.
Blade Type
3-V Vinyl Clip-on 16 ga. 14 ga. 455501 -20 180
Fabricated
Airfoil
Aluminum
Airfoil
Elastomer
Material
Silicone Adhesive All All 457053 -60 400
SS/Silicone Clip-on 16 ga. 12 ga. 220108 -60 400
Silicone PSA All All 464605 -60 350
Silicone Adhesive All All 457053 -60 400
EPDM PSA All All 468644 -20 250
SS/Silicone Clip-on 16 ga. 12 ga. 220108 -60 400
Silicone Groove n/a n/a 461254 -60 400
EPDM Groove n/a n/a 460115 -20 250
Blade
Attachment
Blade Thickness Greenheck
Minimum Maximum Minimum Maximum
Part number
Copyright © 2008 Greenheck Fan Corporation
Temperature °F (°C)
Blade Seal Replacement Instructions
Rev. 2 Nov 2008
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