Vermont Castings DV360 Operations Instructions download pdf (Page 18)

DV360/580 Series Direct Vent Gas Fireplace

20010667

3 x 90°

Elbows

3 x 90°

Elbows

FP1176

Fig. 27 Maximum three (3) 90° elbows per installation.

• If a 90° elbow is used in the horizontal vent run

(level height maintained) the horizontal vent length

is reduced by 36” (914 mm). (Fig. 29, 30) This does

not apply if the 90° elbows are used to increase or

redirect a vertical rise. (Fig. 27)

Example: According to the vent graph (Page 14) the

maximum horizontal vent length in a system with a 7¹⁄₂’

(2.3 m) rise is 20’ (6 m) and if a 90° elbow is required in

the horizontal vent it must be reduced to 17’ (5.2 m).

Max 20"

36"

(914mm)

Max.

36"

(914mm)

Max.

FP1177

Fig. 28 Maximum horizontal run with no rise.

7'6"

(2.3m)

A + B = 17' (Max.)

(5.2m)

FP1178

Fig. 29 Horizontal run reduction.

V584-201

Horizontal Run

2/99 djt

10’

(3 m)

7’

(2.1 m)

8’

(2.4 m)

V584-201

Fig. 30 Maximum vent run with elbows.

In Figures 29 & 30, dimension A plus B must not be

greater than 17’ (5.2m)

• The maximum number of 45° elbows permitted per

side wall installation is two (2). These elbows can be

installed in either the vertical or horizontal run.

• For each 45° elbow installed in the horizontal run,

the length of the horizontal run MUST be reduced by

18” (457 mm). This does not apply if the 45° elbows

are installed on the vertical part of the vent system.

• The maximum number of elbow degrees in a system

is 270°. (Fig. 31)

Example:

Elbow 1 = 90°

Elbow 2 = 45°

Elbow 3 = 45°

Elbow 4 = 90°

Total angular variation = 270°

1 + 2 + 3 + 4 = 270°

FP1180

Fig. 31 Maximum elbow usage.

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Vermont Castings DV360 Operations Instructions Page 18

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