Vermont Castings DVA4136 Installation Instructions And Homeowner's Manual page 15

Example:
Elbow 1 =
Elbow 2 =
Elbow 3 =
Elbow 4 =
Total angular variation = 270°
1 + 2 + 3 + 4 = 270°
1
Fig. 17 Maximum number of elbow degrees.
NOTE: When using flex vent, the opening will have to
be measured according to the 1/2" (13 mm) rise in 12"
(305 mm) vent run.
Combustible Walls: (Fig. 18) Cut a 9³⁄₈"H x 9³⁄₈"W (240
x 240 mm) hole through the exterior wall and frame as
shown.
Noncombustible Walls: (Fig. 18) Hole opening must
be 7¹⁄₂" (190 mm) in diameter.
Vent Opening for Combustible Wall
9³⁄₈"
(240mm)
9³⁄₈"
(240mm)
Fireplace Hearth
Opening for Noncombustible Wall
7¹⁄₂"
(190mm)
Fig. 18 Locate vent opening on wall.
STEP 2
Measure wall thickness and cut zero clearance sleeve
parts to proper length (MAXIMUM 12"/305 mm). As-
semble sleeve and attach to firestop with #8 sheet
metal screws (supplied). Install firestop assembly. (Fig.
VO584-100
19)
Vent Opening
2/99 djt
10010270
90°
45°
4
45°
90°
3
2
FP1239
Framing
Detail
VO584-100
DVA4136 Series Direct Vent Gas Fireplace
Zero clearance sleeve is only required for
combustible walls.
STEP 3
Place fireplace into position. (Fig. 20) Measure the ver-
tical height (X) required from the base of the flue collars
to the center of the wall opening.
Adjustable
Zero Clearance
Sleeve
#8 Screws
(2)
Adjustable Zero Clearance Sleeve
ZCS101
Fig. 19 Adjustable zero clearance sleeve.
Zero Clearance Sleeve
3/11/99 djt
X
Fig. 20 Vertical height requirement.
STEP 4
Attach the appropriate venting component(s) to the
inner and outer flue collars of the fireplace using three
(3) screws. (Fig. 21) Follow with the installation of the
inner and outer elbow. Again secure joints with three (3)
sheet metal screws.
STEP 5
Measure the horizontal length requirement including
a 2" (51 mm) overlap, ie from the elbow to the outside
wall face plus 2" (51 mm) (or the distance required if
installing a second 90° elbow). (Fig. 21)
Always install horizontal venting on a level
plane.
Max. Length
12" (305mm)
#8 Screws (2)
#8 Screws
(2)
Firestop
ZCS101
FP1240
15