Desa VVF36 Owner's Operation And Installation Manual page 14

WARNING: Do not recess
vent termination in to any wall.
This will cause a fire hazard.
. Combustible Exterior Wall: For. vinyl.
siding, stucco, or wood exteriors, a siding
standoff.must.be.installed.between.vent.
cap. and. exterior. wall.. Siding. standoff.
prevents.excessive.heat.from.damaging.
siding. materials.. Siding. materials. must.
be. cut. to. accommodate. standoff.. Bolt.
vent.cap.to.standoff..Apply.non-hardening.
mastic.around.outside.edge.of.standoff..
Position. standoff/cap. assembly. in. the.
center of square hole and attach to exte-
rior.wall.with.wood.screws.provided.(see.
Figure 20). Siding standoff must sit flush
against.exterior.fascia.material.
5.. Connecting Vent Cap with Horizontal
Vent Pipe: Slide wall firestop over vent
pipe before connecting horizontal run to
vent.cap.(see.Figure.1).
Apply.Mastic.to.
All.Four.Sides
Figure 20 - Installing Vinyl Siding
Standoff (Combustible Exterior Wall)
14
VENTING INSTALLATION
Cut.Vinyl.Siding.
Away.to.Fit.Standoff
Standoff
Wood. Vent.
Screw
Cap
Bolt
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Continued
6. Make final connection to vent terminal. .
Flush or recessed with short vent sys-
tem: Vent system may be pre-sized. Check
for final fit and slide unit into framing with
firestop in place. This is helpful when using
rigid.pipe.and.round.vent.termination..Vent.
may.be.preconnected.and.slipped.through.
firestop. Make sure 45° connection at unit
is. tight. and. does. not. come. loose. before.
unit.is.nailed.to.framing.
. Square vent or long vent configuration:.
Vent.pipe.must.be.manipulated.at.outer.
end to make final connection. Manually
secure. pipe. inside. open. framing.. If. this.
is a retrofit installation in an inaccessible
space, you may have to secure outer
end.of.vent.pipe.with.wall.straps.and.tap.
screws.at.outer.end.
When using tap screws with rigid pipe,
be. sure. that. screws. do. not. penetrate.
inner. pipe.. These. procedures. may. also.
be followed by flexible pipe installations.
To use flexible pipe, vent must be drawn
through end firestop, cut back to 6"-8" to
permit easy connection of flex termination
and.connection.must.be.slipped.back.into.
and.secured.to.installation..You.must.use.
an adequate number of spring spacers at
ends.and.closest.bend.to.termination.to.
prevent kinks or collapsing on the fire. Do
not use screws with flex pipe. Vent system
must. be. code. inspected. and. released.
before. adding. dry. wall. or. other. surface.
treatments.
Vent Cap (Horizontal
Termination)
Figure 21 - Connecting Vent Cap with
Interior.Wall.
Surface
Interior.Wall.Firestop.
(Combustible.
Exterior.Wall.Only)
Horizontal Vent Pipe
Horizontal
Vent.Pipe
Screw
56131H