Heatilator LM42, Installation Manual, Page: 2 / 44

Heatilator • LM42 • Installers Manual • 4087-901 • Rev A • 04/14/16
2
Safety Alert Key:
• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
•
CAUTION!
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Indicates practices which may cause damage to the fireplace or to property.
Table of Contents
1 Product Specific & Important Safety Information
A. Fireplace Certification 4
B. Glass Speficition 4
C. Non-Combustible Materials 4
D. Combustible Materials 4
2 Getting Started
A. Typical Fireplace System 5
B. Design and Installation Considerations 6
1. Locating Fireplace & Chimney 6
2. Selecting Fireplace Locations 7
3. Selecting Fireplace Location Outdoors &
Requirements 8
C. Tools and Supplies Needed 10
D. Inspect Fireplace and Components 10
E. Fireplace System Requirements 11
3 Framing and Clearances
A. Fireplace Dimensions 12
B. Clearances 13
C. Construct the Chase 15
D. Frame 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 Requirements
A. Chimney Requirements 20
B. Offsets/Returns 21
C. Termination Requirements 22
5 Chimney Installation
A. Typical Chimney System 23
B. Assemble Chimney Sections 24
C. Secure Offset/Return 24
D. Install Firestops 25
E. Install Attic Insulation Shield 26
F. Thimble Installation - Manufactured Home 27
G. Roof Penetration 28
H. Install Chase/Chase Top 28
I. Install Termination Cap 29
6 Shrouds
A. Radiation Shield 31
B. Field Constructed Shrouds 31
1. Open Top Shroud 31
2. Mailbox Style Shroud 32
3. Roofed Style Shroud 32
7 Facing, Mantels & Hearth Extensions
A. Finishing Material 33
B. Hearth Extension, Building and Finishing 34
1. Fireplace Installed Flush on the Floor
and Hearth Extension Raised to Bottom
of Firebox Opening 35
2. Raised Hearth Extension and Raised Fireplace 35
3. Fireplace Opening and Hearth Extension Flush
with the Floor 35
C. Mantel and Wall Projections 36
D. Sidewalls/Surrounds 37
8 Fireplace Accessories
A. Gas Log/Lighter Provision 38
9 Reference Materials
A. Chimney Components 39
B. Optional Components 43
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= Contains updated information.