Desa VYM27NR - Manual (Page 2)

www.desatech.com 108382-01G 2
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
State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the
Commonwealth of Massachusetts.
Sellers of unvented propane or natural gas-fired supplemental room heaters shall provide to each
purchaser a copy of 527 CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for bedroom and bathroom installation in the Common-
wealth of Massachusetts.
TAbLE OF CONTENTS
Safety Information ............................................... 3
Product Identification ........................................... 4
Local Codes......................................................... 5
Unpacking............................................................ 5
Product Features ................................................. 5
Remote Rontrol Rccessories ............................... 5
Air for Combustion and Ventilation ...................... 5
Installation ........................................................... 8
Operating Heater ............................................... 16
Inspecting Burners ............................................ 19 Cleaning and Maintenance ................................ 20
Wiring Diagram .................................................. 21
Specifications .................................................... 21
Replacement Parts ............................................ 21
Service Hints ..................................................... 21
Technical Services ............................................. 21
Troubleshooting ................................................. 22
Accessories ....................................................... 25
Illustrated Parts Breakdown and Parts List........ 26
Warranty Information ...........................Back Cover