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DV425TR DIRECT VENT ROOM HEATER
02/01 Page 30 250-5533
Step 4.
Position the horizontal vent termination in the
center of the 10” (254mm) square hole, run a bead
of non-hardening mastic around its outside edges, so
as to make a seal between it and the wall, attach
termination cap to the exterior wall with the four wood
screws provided. The arrow on the vent cap should be
pointing up (Figure 7) . Ensure that proper clearances
to combustible materials are maintained.
FIG. 7
HORIZONTAL INSTALLATION, cont.
FIG. 8
NOTES:
(1) The four wood screws provided should be
replaced with appropriate fasteners for stucco,
brick, concrete, or other types of sidings.
(2) If you are using Simpson Dura-vent termination
cap #985 on a building with vinyl siding, a vinyl
siding standoff (Simpson Dura-vent Part #950),
should be installed between the vent cap and the
exterior wall (Figure 8). Attach the vinyl siding
standoff to the horizontal vent termination. The
vinyl siding standoff prevents excessive heat from
possibly melting the vinyl siding material. Vent
terminal shall not be recessed into a wall or
siding. Remove siding from beneath area of
standoff.
HOT
WOOD
SCREW
WALL THIMBLE
#942
PART HHW2 PART
841-0670 (Preferred)
or #985
WALL THIMBLE
COVER PART 940
WALL THIMBLE
PART 942
VINYL SIDING STANDOFF
WITH SIDING BENEATH
REMOVED
SCREWS
BOLT HORIZONTAL TOP
TO VINYL STANDOFF
SCREWS
APPLY SEALANT
TO ALL FOUR
SIDES
VINYL SIDING