Desa VF-24N-MHD, VF-24P-MHD, VF-18N-MHD, VF-18P-MHD, VF-18P-MHD, VF-18N-MHd Table of Contents

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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 a 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.

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.

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19

Product Identification

4

Troubleshooting

21

Local Codes

5

Wiring Diagram

24

Unpacking

5

Replacement Parts

25

Product Features

5

Service Hints

25

Air For Combustion and Ventilation

5

Technical Service

25

Installation

8

Accessories

25

Operating Heater

15

Illustrated Parts Breakdown and Parts List

26

Inspecting Burners

18

Warranty Information

Back Cover



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Contents What to do if YOU Smell GAS Models VF-18N-MHD, VF-18P-MHD, VF-24N-MHD VF-24P-MHDTable of Contents Safety Information Product Identification Product IdentificationUnpacking Product FeaturesLocal Codes Air For Combustion VentilationDetermining if You Have a Confined or Unconfined Space Determining fresh-air flow for heater locationConfined and Unconfined Space Ventilation Air From Outdoors Ventilation AIRVentilation Air From Inside Building Installation Check GAS TypeInstallation and clearances for vent-free operation Installation Mantel Clearances Installing Heater AssemblyDetermining Minimum Mantel Clearance When using a Hood Floor ClearancesConnecting to gas supply Installation Items NeededPropane/LP Gas Checking gas connectionsNatural Gas Test Pressures Equal To or Less Than Psig 3.5 kPa Pressure Testing Heater Gas ConnectionsAdding Embers, Lava rock and Decorative logs For your safety Read before lighting Operating HeaterRemote Control FunctionsProcedure Manual LightingPilot Flame Pattern Inspecting BurnersTo turn gas off To appliance Lighting with Piezo IgnitorBurner Injector Holder Air Inlet Hole Cleaning MaintenanceBurner Flame Pattern Injector Holder on Front Burner Tube Troubleshooting Observed Problem Possible Cause RemedySee Cleaning and Mainte Bad module Replace module Gas leak. See WarningWiring Diagram Identifying error signals from receiverTechnical Service Replacement PartsService Hints AccessoriesIllustrated Parts Breakdown Models VF-18N-MHD, VF-18P-MHD, VF-24N-MHD and VF-24P-MHDParts List Limited Warranty VENT-FREE GAS LOG Heaters Warranty InformationKeep this Warranty
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