LOPILOTOFFHIUNVENTED (VENT-FREE) GAS LOG HEATEROWNER’S OPERATION AND INSTALLATION MANUALRemote-Ready and Variable Manually-Controlled ModelsAlso Design-Certified As Vented Decorative AppliancesSave this manual for future reference.Save this manual for future reference.WARNING: If the information in this manualis not followed exactly, a fire or explosionmay result causing property damage, per-sonal injury, or loss of life.— Do not store or use gasoline or otherflammable vapors and liquids in the vicinityof this or any other appliance.— WHAT TO DO IF YOU SMELL GAS• Do not try to light any appliance.• Do not touch any electrical switch; do notuse any phone in your building.• Immediately call your gas supplier from aneighbor’s phone. Follow the gassupplier’s instructions.• If you cannot reach your gas supplier, callthe fire department.— Installation and service must be performedby a qualified installer, service agency, orthe gas supplier.WARNING: Improper installation, adjust-ment, alteration, service, or maintenancecan cause injury or property damage. Re-fer to this manual for correct installationand operational procedures. For assis-tance or additional information consult aqualified installer, service agency, or thegas supplier.WARNING: This appliance is for installa-tion only in a solid-fuel burning masonryor UL127 factory-built fireplace, or in anapproved ventless firebox. It is design-certified for these installations in accor-dance with ANSI Z21.11.2. Exception: Donot install this appliance in a factory-builtfireplace that includes instructions stat-ing it has not been tested or should not beused with unvented gas logs.WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in whichit is installed. Provisions for adequate combustion and ventilation air must be provided. RefertoAir for Combustion and Ventilation section on page 4 of this manual.For more information, visit www.desatech.comFor more information, visit www.desatech.comThis appliance may be installed in an aftermarket,* manufactured (mobile) home, where notprohibited by local codes.This appliance is only for use with the type of gas indicated on the rating plate. This applianceis not convertible for use with other gases.* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer("A" Models) 18", 24", and 30"Remote-Ready(“C” Models) 18", 24", and 30"Variable Manually-Controlled(“B” Models) 18", 24", and 30"Thermostatically-ControlledTM