WARNING: Improper installation, adjustment, altera- tion, service, or maintenance can cause injury or prop- erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi- tional information consult a qualified installer, service agency, or the gas supplier.

WARNING: This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built fire- place, or in an listed ventless firebox enclosure. It is de- sign-certified for these installations in accordance with ANSI Z21.11.2. Exception: Do not install this appliance in a factory-built fireplace that includes instructions stating it has not been tested or should not be used with unvented gas logs. For unmarked factory-built fireplaces, contact fireplace manufacturer if unsure of this application.

WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Provi- sions for adequate combustion and ventilation air must be provided. Refer to Air for Combustion and Ventilation section on page 5 of this manual.

This appliance may be installed in an aftermarket,* per- manently located, manufactured (mobile) home, where not prohibited by local codes.

This appliance is only for use with the type of gas indi- cated on the rating plate. This appliance is not convert- ible for use with other gases.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

TABLE OF CONTENTS

Safety Information

3

Cleaning and Maintenance

................................

19

Local Codes

4

Troubleshooting

20

Product Identification

5

Optional Positioning of Thermostat Sensing Bulb..

24

Unpacking

5

Specifications

25

Product Features

5

Replacement Parts

25

Air For Combustion and Ventilation

5

Service Hints

25

Installation

8

Accessories

25

Operating Heater

16

Illustrated Parts Breakdown and Parts List

26

Inspecting Burners

18

Warranty Information

Back Cover

Technical Service

18

 

 

 

 

 

 

2

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Desa CDR3924NT installation manual Table of Contents