Hearth and Home Technologies T4200 manual Chimney Requirements, Using Offsets and Returns

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T4200 FIREPLACE INSTALLATION INSTRUCTIONS

E. CHIMNEY REQUIREMENTS

When planning your fireplace location, the chimney construction and necessary clearances must be considered. The fireplace system and chimney components have been tested to provide flexibility in construction. The following figures are the minimum distances from the base of the fireplace.

1.

Minimum overall straight height

14.5 ft.

2.

Minimum height with offset/return

18.5 ft.

3.

Maximum height

90 ft.

4.

Maximum chimney length between an offset and return

20 ft.

5.

Maximum distance between chimney stabilizers

35 ft.

6.

Double offset/return minimum height

24 ft.

7.

Maximum unsupported chimney length between the offset and return

6 ft.

8.

Maximum straight unsupported chimney height above the fireplace

35 ft.

1.Using Offsets and Returns

a.To bypass any overhead obstructions, the chimney may be offset using a 30° offset/return (SL1130). Perform the following steps to determine the correct chimney component combination for your particular installation.

b.An offset and return may be attached together or a chimney section(s) may be used between an offset and return.

1)Measure how far the chimney needs to be shifted to enable it to avoid the overhead obstacle. See Figure 7, dimension “A” to determine chimney sections required to achieve the needed shift.

2)After determining the offset dimension, refer to Table 1 and find the “A” dimension closest to but not less than the distance of shift needed for your installation.

3)The “B” dimension that coincides with the “A” dimension represents the required vertical clearance that is needed to complete the offset and return.

4)Read across the chart and find the number of chimney sections required and the model number of those particular chimney parts.

5)Whenever the chimney penetrates a floor/ceiling, a firestop spacer must be installed.

6)The effective height of the fireplace assembly is measured from the base of fireplace to top of starter collar. See Figure 6.

Table 1

 

Offset/Returns

30° Offset Chart

A

 

B

 

SL1106

SL1112

SL1118

SL1136

SL1148

 

 

 

 

 

 

 

 

 

37/8"

14½"

 

-

-

 

-

-

-

6¼"

185/8"

 

1

-

 

-

-

-

9¼"

 

23¾"

 

-

1

 

-

-

-

12¼"

 

29"

 

-

-

 

1

-

-

145/8"

33"

 

-

2

 

-

-

-

175/8"

38¼"

 

-

1

 

1

-

-

21¼"

445/8"

 

-

-

 

-

1

-

235/8"

48¾"

 

1

-

 

-

1

-

27¼"

 

55¾"

 

-

-

 

-

-

1

295/8"

59"

 

1

-

 

-

-

1

325/8"

64¼"

 

-

1

 

-

-

1

355/8"

69½"

 

-

-

 

1

-

1

38"

735/8"

 

-

2

 

-

-

1

41"

 

78¾"

 

-

1

 

1

-

1

445/8"

85"

 

-

-

 

-

1

1

47"

891/8"

 

1

-

 

-

1

1

505/8"

 

95½"

 

-

-

 

-

-

2

Proper assembly of air cooled chimney parts results in an overlap at chimney joints of 1¼". Effective length is built into this table.

WARNING!

Do not com- bine offsets to create an off- set greater than 30° from vertical. This may create a fire hazard since the natu- ral draft may be restricted.

Figure 7 - Chimney Offset/Return

Example: Your “A” dimension from Figure 7 is 14½”. Using Table 1 the dimension closest to, but not less than 14½” is 145/8” using a 30° offset/return. It is then determined from the table that you would need 33” (Dimension “B”) between the offset and return. The chimney components that best fit your application are two SL1112s.

12/03

35036 Rev E

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Contents Installation & Operating Instructions Table of Contents Design and Installation Considerations Description of the Fireplace System Listings and Code ApprovalsFireplace Components Catalog # Description System ComponentsCatalog # Description Chimney ComponentsFirestop Spacer TR11T Fireplace Locations and Space Requirements PRE-INSTALLATION PreparationSidewalls/Surrounds Framing the FireplaceChimney Requirements Using Offsets and ReturnsOffset/Returns Offset Chart Number of Sections Required Chimney Height Requirements above roof lineLevel the Fireplace Installation of FireplacePosition the Fireplace Place the Protective Metal Hearth StripsAssemble Chimney Sections Install Firestop SpacersSecure the Chimney System Double-check the Chimney AssemblyAttic Insulation Shield Mark the Exit Point of the Roof Install the Roof FlashingInstall the Outside Air Kit Install the Chimney Air KitGas Log/Lighter Provisions Complete the EnclosureFactory Built Hearth Extension Hearth ExtensionGlass Doors Position the Hearth ExtensionFinishing Material MantelMaterials Constructing a ChaseTermination Cap Chase TopFlue Damper Operating InstructionsGeneral Information Outside Air Wood Fuel GrateFirescreen Starting a Fire Draft ProblemsFlue Draft Creosote and Soot Maintenance InstructionsChimney Cleaning Disposal of AshesIndex Heatilator Woodburning Fireplace Limited WarrantyReplacement Parts Advantage How to Obtain Service

T4200 specifications

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