![background image](http://html1.mh-extra.com/html/desa/vtn25r/vtn25r_safety-information-and-installation-manual_2485673002.webp)
www.desatech.com
113261-01A
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 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
Local Codes ........................................................ 4
Product Identification ........................................... 4
Unpacking ........................................................... 4
Product Features ................................................. 4
Air For Combustion and ventilation ..................... 5
Installation ........................................................... 7
Operating Heater ............................................... 13
Inspecting Heater .............................................. 15
Cleaning and Maintenance ................................ 16
Service Hints ..................................................... 16
Technical Service .............................................. 16
Troubleshooting ................................................. 17
Illustrated Parts Breakdown .............................. 20
Parts List ........................................................... 21
Specifications .................................................... 22
Accessories ....................................................... 22
Service Publications .......................................... 22
Replacement Parts ............................................ 22
Parts Central ..................................................... 23