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Heatilator • LM42 • Installers Manual • 4087-901 • Rev A • 04/14/16

39

9 

Reference Materials 

A. Chimney Components

Section 9

CAK4A Chimney Air Kit

SL3  Chimney  Stabilizer

Chimney Sections

A =  Actual Length

B =  Effective Length (length of 

chimney part after it has 

been snapped to another)

8 in.

(203 mm)

10-1/2 in.

(267 mm)

A

B

20-3/4 in.

(527 mm)

Inside

Diameter

8 in.

(203 mm)

Outside

Diameter

10-1/2 in.

(267 mm)

4-3/4 in. (121 mm)

Effective Height

10-1/2 in.

(287 mm)

12 in.

(305 mm)

5-1/4 in.

(133 mm)

4 in. (102 mm)

12 in.

(305 mm)

Catalog #

A

B

in

mm

in

mm

SL306

6

152

4-3/4

121

SL312

12

305

10-3/4

273

SL318

18

457

16-3/4

425

SL324

24

610

22-3/4

578

SL336

36

914

34-3/4

883

SL348

48

1219

46-3/4

1187

Catalog #

Description

CAK4A

Chimney Air Kit

ID4/ID6

Insulated Duct/Outside Air

UD4/UD6

Uninsulated Duct/Outside Air

SL306

Chimney Section - 6 in. (152 mm) long

SL312

Chimney Section - 12 in. (305 mm) long

SL318

Chimney Section - 18 in. (457 mm) long

SL324

Chimney Section - 24 in. (610 mm) long

SL336

Chimney Section - 36 in. (914 mm) long

SL348

Chimney Section - 48 in. (1219 mm) long

SL3

Chimney Stabilizer

SL315

Chimney Offset/Return - 15 deg

SL330

Chimney Offset/Return - 30 deg

FS338

Ceiling Firestop - Straight

FS339

Ceiling Firestop - 15 deg

FS340

Ceiling Firestop - 30 deg

AS8

SL300 Straight Attic Insulation Shield, 24 in. (610 mm)

JB877

Chimney Joint Band

CB876

Chimney Bracket

RF370

Roof Flashing - Flat to 6/12 Pitch

RF371

Roof Flashing - 6/12 to 12/12 Pitch

TR344

Round Termination Cap

TR342-B

Round Telescoping Termination Cap

ST375

Square Termination Cap

TS345

Square Termination Cap

TS345P

Square Termination Cap - Painted

TCT375

Terra Cotta Termination Cap

TR-TVK

TR Top Vent Kit

DTO134

Short Octagon Decorative Cap

DTO146

Tall Octagon Decorative Cap

DTS134

Short Square Decorative Cap

DTS146

Tall Square Decorative Cap

LDS33

Decorative Shroud - 3 ft x 3 ft (.91 m x .91 m)

LDS46

Decorative Shroud - 4 ft x 6 ft (1.22 m x 1.83 m)

LDS-BV

Decorative Shroud - 26 in. x 26 in. (660 mm x 660 mm)

Field Constructed Shrouds (See “Woodburning Termination 

Cap”)

CT-3A-B

Adapter - May be used with the following caps

CT Series

DT Series

MH841

Manufactured Housing 20 in. Thimble Extension

12966A

Manufactured Housing Thimble

Summary of Contents for LM42

Page 1: ...es and other flammable materials away INSTALLER Leave this manual with party responsible for installation and operation OWNER Retain this manual for future reference LM42 LM42 SS NOTICE DO NOT discard...

Page 2: ...the Fireplace 16 E Secure and Level the Fireplace 16 F Protective Metal Hearth Strips 17 G Outside Air Kit required 18 H Non Combustible Facing Material Installation 19 4 Chimney and Termination Requ...

Page 3: ...Explosion Failure to install fireplace acording to these instructions can lead to a fire or explosion Manual bag and all of its contents are removed from the fireplace and given to the party responsi...

Page 4: ...e Risk WARNING TO AVOID THE RISK OF DAMAGING FIREPLACE MA TERIALS AND INCREASING THE RISK OF SPREAD ING A FIRE DO NOT USE THE FIREPLACE TO COOK OR WARM FOOD WARNING THIS FIREPLACE MAY BE INSTALLED IN...

Page 5: ...hanger straps Support straps on rafter supports chimney not shown Attic insulation shield must be used to keep insulation away from chimney if attic is insulated Ceiling firestop on floor of attic Fr...

Page 6: ...ne Avoid outside wall Marginal Location Wind loading possible Not recommended in basement due to high negative pressure concerns that effect draft Figure 2 2 Recommended Chimney Locations Sections 4 a...

Page 7: ...Locations NOTICE Illustrations and photos reflect typical installations and are FOR DESIGN PURPOSES ONLY Illustrations diagrams are not drawn to scale Actual installation appearance may vary due to i...

Page 8: ...us tible surface Locate cooling air inlet to prevent blockage from leaves snow ice or other debris Blockages could cause the unit to overheat Cooling air can be provided by cutting a 6 in hole in the...

Page 9: ...t FREESTANDING INSTALLATION COOLING AIR REQUIRED Figure 2 5 Freestanding Fireplace Locations Outdoors LM42 SS only Note If this surface is inside the building s warm air envelope then this surface mus...

Page 10: ...stall dam aged incomplete or substitute components CAUTION Risk of Cuts Abrasions Wear protective gloves and safety glasses during installation Sheet metal edges are sharp 1 Unpacking a Remove the car...

Page 11: ...the smaller weight assembly 8 weights Double check both sides to make sure the snap rings are all straight up j Reinstall the side cover access panel i Nailing flanges should go on opposite as the di...

Page 12: ...901 Rev A 04 14 16 12 3 Framing and Clearances Figure 3 1 Fireplace Dimensions A Appliance Diagrams Dimensions are actual appliance dimensions Use for reference only For framing dimensions and cleara...

Page 13: ...l studs concrete board etc Failure to comply may cause a fire Figure 3 2 Clearances to Combustible Materials Minimum Clearances to Combustibles WITHIN ENCLOSURE AREA Standoffs to backwall 0 in 0 mm St...

Page 14: ...h Opening Height Rough Opening Depth Rough Opening Width Clearance to Ceiling Combustible Floor Minimum Hearth Depth Standoff Behind Appliance Standoff Side of Appliance Inches 14 1 2 60 1 4 24 65 1 2...

Page 15: ...ion in the outside walls of the chase Attic Insulation Shield Chimney Ceiling Firestop Tabs False Ceiling False Ceiling Insulation Insulation Storm Collar Figure 3 4 Chase Assembly 1 2 3 All outside w...

Page 16: ...nished cavity depth must be no less than 24 in 610 mm from the finished backwall to the outside of front wall framing CAUTION Risk of Cuts Abrasions Wear protective gloves and safety glasses during in...

Page 17: ...When the fireplace opening is elevated more than 12 in 305mm above the hearth extension protect the joint of the hearth extension and wall with metal hearth strip Seal with grout mortar or high temper...

Page 18: ...etween the wall and the pipe with silicone to prevent moisture penetration and air leaks Seal between the outside air inlet hood and the house with silicone to prevent air infiltration WARNING Risk of...

Page 19: ...e the top board down the front of the unit and behind the flanges around the opening of the fireplace Secure the board to the fireplace at the predrilled holes with the 1 1 4 inch screws provided Atta...

Page 20: ...aximum unsupported chimney above roof 6 ft 1 83 m Freestanding Unit using 1 SL348 8 ft 8in 2 64 m WARNING Risk of Fire You must maintain 2 in 51 mm air space clearance to insulation and other combusti...

Page 21: ...rom Figure 4 2 is 14 1 2 in 368 mm Using Table 4 3 the dimension closest to but not less than 14 1 2 in 368 mm is 14 1 2 in 368 mm us ing a 30 offset return You determine from the table that you need...

Page 22: ...must extend 2 ft 6 m above any portion of the roof or adjacent structures within 10 ft 3 m of the chimney Figure 4 3 Multiple Chimney Locations C Termination Requirements Install a cap approved and l...

Page 23: ...onal support for tall chimneys Install roof flashing according to minimum requirements Maintain minimum clearances to combustibles as specified Offsets returns may not exceed 30 from vertical Lock chi...

Page 24: ...y pushing down ward until the top section meets the stop bead on the lower section The inner flue is placed to the inside of the flue section be low it The outer casing is placed outside the outer cas...

Page 25: ...penetrates a ceiling floor Mark and cut an opening in ceiling floor as shown in Figure 5 5 Frame the opening Nail the firestop to the bottom of the ceiling floor joists Provide a means to maintain the...

Page 26: ...or other envirornmental conditions is not allowed The shield or barrier must be tall enough to extend above the insulation and prevent blown in insulation from spilling into the cavity Maintain speci...

Page 27: ...e thimble using the screws provided with the extension Install the thimble assembly and nail screw it securely to the framing members Center the flashing over the chimney and fasten it appropriately t...

Page 28: ...down Drip Edge Chase 2 in 51 mm Collar on Chase Top 018 26 ga min Galvanized Chase Top Figure 5 10 Chase Top Construction H Install Chase Top WARNING Risk of Fire DO NOT caulk the pipe to the chase t...

Page 29: ...s between storm collar pipe and storm collar chase top Termination cap pipe and chimney section must be snapped together to maintain an overlap of 1 1 2 in 38 mm Slip storm collar around chimney pipe...

Page 30: ...in 51 mm Minimum Height Remove 2 screws from front back to lift the top off Place waterproof sealer under each flange of the termination cap and on top of each screw to help prevent leaks The last sec...

Page 31: ...designs with multiple terminations contact your authorized HHT dealer 3 in 76 mm minimum Min Base Dim Min Base Dim Min Top Dim Min Top Dim Min Opening Width Min Opening Width Radiation Shield 14 1 2...

Page 32: ...Top Radiation Shield 3 in 76 mm Radiation Shield Height Termination Cap 3 Roofed Style Shroud Radiation shield required 2 Mailbox Style Shroud Radiation shield required TR344 TR342 B TR342 B TR344 wit...

Page 33: ...terial not only includes the decorative finish materials marble tile slate etc but also the thin set lath and adhesive used to attach the decorative finish material Finishing Materials Finish and Seal...

Page 34: ...t of using one or more sources of material as long as the R value is attained See Table 7 2 and Figure 7 3 Refer to Table 7 2 for hearth extension insulation alternatives NOTICE Hearth Home Technologi...

Page 35: ...al such as metal framing or equivalent material and sitting on 1 2 in Micore or other material with an R value of 1 03 When creating the platform allow for the thickness of the non combustible finishe...

Page 36: ...the fireplace opening Combustible trim must not cover the metal surfaces of the fireplace Figure 7 5 Mantel Specifications 36 in 914 mm minimum from fireplace opening to ceiling Combustible Wall 2 x...

Page 37: ...nts 1 in scale A Fireplace Opening B Outside Dimensions in 42 62 mm 1067 1575 LM42 Model D Sidewalls Surrounds Locate adjacent combustible sidewalls a minimum of 12 in 305 mm from fireplace opening Ma...

Page 38: ...DUCE RISK OF FIRE OR INJURY DO NOT INSTALL AN UNVENTED GAS LOG SET INTO THIS FIREPLACE CAUTION Risk of Fire WHEN USING THE DECORA TIVE LOG SET THE FIREPLACE DAMPER MUST BE SET IN THE FULLY OPEN POSITI...

Page 39: ...914 mm long SL348 Chimney Section 48 in 1219 mm long SL3 Chimney Stabilizer SL315 Chimney Offset Return 15 deg SL330 Chimney Offset Return 30 deg FS338 Ceiling Firestop Straight FS339 Ceiling Firestop...

Page 40: ...int Band 2 in 51 mm 10 1 2 in 267 mm 24 5 8 in 625 mm 27 3 8 in 695 mm 12 in 305 mm 31 in 787 mm 24 5 8 in 625 mm 12 in 305 mm SL315 SL330 Offset Return Inside Diameter 8 in 203 mm Outside Diameter 10...

Page 41: ...stallers Manual 4087 901 Rev A 04 14 16 41 TR344 Round Termination Cap TR342 B Round Telescoping Termination Cap ST375 Square Termination Cap TS345 TS345P Square Termination Cap 15 3 4 in 400 mm TCT37...

Page 42: ...ual 4087 901 Rev A 04 14 16 42 20 in 508 mm DTO134 34 in 864 mm 24 in 610 mm 46 in 1168 mm 22 3 4 in 577 mm DTO146 26 in 660 mm 34 in 864 mm 21 3 16 in 538 mm DTS134 24 in 610 mm 21 3 16 in 538 mm 46...

Page 43: ...in mm in mm LDS33 36 914 36 914 8 5 216 11 279 LDS46 48 1219 72 1829 8 5 216 11 279 Catalog A B C E E LDS BV in 26 12 5 15 5 22 23 mm 660 318 394 533 584 LDSCPM Corner Post Kit for custom sizes 16 in...

Page 44: ...Heatilator a brand of Hearth Home Technologies 7571 215th Street West Lakeville MN 55044 www heatilator com Please contact your Heatilator dealer with any questions or concerns For the location of yo...

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