MHSC CRLDVPS Instruções de Operação descarregar pdf (Página 22)

20306750

Designer Series Direct Vent Gas Fireplace

HORIZONTAL WITH VERTICAL RISE

(THROUGH-THE-WALL)

TERMINATION CONFIGURATIONS

Since it is very important that the venting system

maintain its balance between the combustion air

intake and the ue gas exhaust, certain limitations

as to vent congurations apply and must be strictly

adhered to.

The Vent Graph, showing the relationship between vertical

and horizontal side wall venting, will help to determine the

various dimensions allowable. Figure 18

Minimum clearance between vent pipes and combustible

materials is 3" on top and 1" from bottom and sides unless

otherwise noted (Exception: Outside wall with restop: 1"

all around pipes are allowed). If the vertical run is 7.5 feet

or more, from the oor of the replace, the clearance is 1"

on all sides of the horizontal run.

When vent termination exits through foundations less than

20" below siding outcrop, the vent pipe must be ush with

the siding.

It is best to locate the replace in such a way that minimizes

the number of offsets and horizontal vent length.

The horizontal vent run refers to the total length of vent

pipe from the ue collar of the replace (or the top of the

Transition Elbow) to the face of the nished outside wall

or the mounting ange of the termination.

• The maximum number of 90° elbows per side wall

installation is three (3). Figure 25

• If a 90° elbow is tted directly on the top of the replace,

the maximum horizontal vent run before the termination

or a vertical rise is 36” (914 mm). Figure 26

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

height maintained) the horizontal vent length is reduced

by 36". Figure 23. This does not apply if the 90° elbows

are used to increase or redirect a vertical rise. Figure

Example: According to the vent graph (Page 19) the

maximum horizontal vent length in a system with a 7.5'

vertical 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).

In Figures 27 and 28 dimension A plus B must not be

greater than 17' (5.2 m).

WARNING

When installing the appliance as a rear

vent unit, the 90° or 45° transition elbow

attached directly to the rear of the unit is

NOT INCLUDED in the following criteria

and calculations and, unless specically

mentioned, should be ignored when

calculating venting layouts.

FP1176

max 90 bends

Figure 25 -

Maximum Three (3) 90°

Elbows Per Installation

3 x 90°

Elbows

3 x 90°

Elbows

FP1176

Max 20"

36"

(914 mm)

Max.

36"

(914 mm)

Max.

FP1177

max horizontal run

Figure 26 -

Maximum Horizontal Run

with No Rise

FP1177

7’6”

90°

FP2837

run reduction

FP2837

Figure 27 -

Horizontal Run Reduction

VENTING INSTALLATION

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 63 64

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