Vermont Casting 36CDVTRN Manuale Utente

22

1

2

3

4

Example: 
 

Elbow 1  =  90°

 

Elbow 2  =  45° 

 

Elbow 3  =  45°

 

Elbow 4  =  90°

  Total angular variation  =  270°

1 + 2 + 3 + 4 = 270°

FP1239

Fig. 42  Maximum number of elbow degrees.

STEP 1
Locate vent opening on the wall. It may be necessary 
to first position the fireplace and measure to obtain hole 
location. Depending on whether the wall is combustible 
or noncombustible, cut opening to size. (Fig. 43)
For combustible walls first frame in opening.
Combustible Walls: (Fig. 43) 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. 43) Hole opening must 
be 7¹⁄₂” (190 mm) in diameter. 

VO584-100

Vent Opening

2/99   djt

9³⁄₈”

(240mm)

9³⁄₈”

(240mm)

Fireplace Hearth

Framing 

Detail

7¹⁄₂”

(190mm)

VO584-100

Fig. 43  Locate vent opening on wall.

STEP 2
Place fireplace into position. (Fig. 44) Measure the verti-

cal height (X) required from the base of the flue collars 

to the center of the wall opening.

X

FP1240

Fig. 44  Vertical height requirement.

STEP 3
Using appropriate venting component(s) attach to 
fireplace with three (3) screws. (Fig. 45) Follow with the 
installation of the inner and outer elbow. Again secure 
joints with three (3) sheet metal screws. 
STEP 4
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. 45)

X

FP1241

Fig. 45  Horizontal length requirement.