Makita EST-48 User Manual download pdf (Page 11)

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

A ¹⁄₈" diameter hole must be drilled in the

chimney joint using a ¹⁄₈" diameter drill. Hole

should be drilled in center of joint overlap (

see

Figure 38

). Be sure to drill only through the

outer chimney casting. Do not puncture the

inner flue.

Maximum offset of chimney system is 30°.

Two offsets must not be assembled to form a

60° offset. However, two sets of offset and

return elbows may be used on a single flue

system, provided the total height of the sys-

tem exceeds 25'.

Return elbow support straps must be securely

attached under tension (in shear) to structural

framing members above. Do not substitute a

FTF13-30 offset elbow in place of a FTF13-E30

return elbow.

OFFSET CALCULATIONS

Step 1. Use Offset Chart to determine amount

of horizontal offset (A) and height (B) for

various chimney section assemblies.

Step 2. Use “Height of Chimney Only” column

in The Vertical Elevation Chart to determine

combinations of chimney used above return

elbow to achieve desired heights. Reference

Components Effective Height Chart in vertical

elevation chart section.

Step 3. Use Elevation Chart as job estimator

only. Add necessary firestop spacers and sta-

bilizers as required. Firestop spacers must be

used as shown in

Figures 22 and 23

and

stabilizers as shown in

Figure 27

MULTIPLE TERMINATIONS

If more than one termination is located in the

same chase or within the same general proxim-

ity, we suggest they should be separated in

distance at least 24" horizontally from flue cen-

ter to flue center and stacked or staggered

vertically at least 18" apart, from the termina-

tion of one smoke exit to the termination of

another smoke exit (

Figure 34

This suggestion is provided in the interest of

better operation. If the terminations are located

too close to each other, smoke may migrate

from one flue into the other.

Figure 34

Figure 35

Stabilizer

20'

Max.

10' Max.

Offset

Elbow

Return

Elbow

18"

24"

FTF13 CHIMNEY COMPONENT

CALCULATIONS

The minimum installed height of the EST-48

fireplaces system is 15' 6", higher with offsets.

The maximum height for the system is 80'.

To determine the number of chimney sections

and chimney components required, follow these

steps:

1. Determine the total vertical height of the

fireplace installation. This distance is measured

from the surface the fireplace rests on to the

point where smoke exits the termination.

2. Determine the number of chimney compo-

nents required, except chimney sections. This

would include firestop spacers, stabilizers, roof

flashing, etc.

3. The effective heights of various components

are:

The Fireplace = 52 ¹⁄₂"

FTF13-12 = 10 1/4"

FTF13-18 = 16 1/4"

FTF13-36 = 34 1/4"

FTF13-CTD termination = 4"

FTF13-CTDT termination= 12" to 18"

FTF13-CT1 termination = 12" to 18"

FTF13-CT2 termination = 15" to 23"

FTF13-S4 stabilizer* = 3"

* Required for every 30' of vertical chimney

and/or 10' of offset chimney.

4. Determine the amount of chimney height

required by subtracting the total combined

height of all pre-selected components (fire-

place and chimney components from the total

desired height).

5. Reference the Vertical Elevation Chart and

determine the number of chimney sections

(quantity and length) required.

SPECIAL OFFSET INSTRUCTIONS

To clear any overhead obstructions, you may

offset your chimney system using Security's

30° offset and return elbows. Use two elbows -

an offset elbow to initiate the offset and a return

elbow to terminate it. A 30° offset elbow, an-

gling in any direction, may be the first compo-

nent used off the top of the fireplace flue collar.

The offset and return elbows may be attached

together, or a section or sections of chimney

may be used between, but do not exceed 20' in

total length between elbows. If sections of

pipe exceed 10' between elbows, a chimney

stabilizer must be used at the midpoint (

Figure

). The stabilizer support straps must be

attached under tension (in shear) to structural

framing members above. When two sets of

elbows are used, the maximum combined

length of chimney used between elbows can-

not exceed 20' (

see Figure 36

). Example: If C

= 10' then C

cannot exceed 10'.

If an offset exceeds 6' in length, each chimney

joint beyond the first 6' of offset to the return

elbow, must be secured by a No. 8 x ¹⁄₂" sheet

metal screw located at the underside of the

joint (

see Figure 37

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Makita EST-48 User Manual Page 11

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