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Owner’s Manual – 

Dragon K85 Mobile 

Furnace

115-volt model F260

DRI-EAZ PRODUCTS, INC. 

15180 Josh Wilson Road, Burlington, WA  USA  98233 

Fax: 360-757-7950

Phone: 360-757-7776

www.dri-eaz.com

The Dragon K85 Mobile Furnace is a diesel fuel- and
electric-powered indirect fired heater. It provides
heated air without adding moisture for a variety of 
applications, including water damage restoration,
structural drying, construction, and temporary event 
shelters.

Safety Information 

Read this Owner's Manual carefully to learn how to 
properly operate and service your Dragon K85 Mobile
Furnace. This manual should be considered a 
permanent part of the machine and should remain
with the Dragon if you sell it. 

Failure to comply with the instructions and precautions
provided in this Owner’s Manual can result in death, 
serious bodily injury, and/or property loss or damage
from hazards of fire, explosion, burn, asphyxiation,
carbon monoxide poisoning, and/or electrical shock.

Electrical Connections 

The Dragon K85 Mobile Furnace is designed to 
operate on a 115V/60 Hz electrical connection. Make
sure that the electrical outlet is grounded with three 
prongs. When using with an extension cord, use only a 
grounded cord intended for outdoor use and rated to 
deliver enough power to the Dragon (4.4 amps@115V
or 506W).

Fuel Type 

The Dragon K85 Mobile Furnace is designed to 
operate on diesel #2 fuel oil only. The Dragon can
operate for a minimum of 8 hours using the internal
tank that holds 9.3 gallons (35 L). Do not run the
Dragon out of fuel, as it may be difficult to restart. For 
longer unattended use, it is recommended that you 
purchase a larger, DOT-approved external fuel tank to 
use with the external fuel siphon.

If external tank is used, cover opening to prevent
contaminants from entering tank. Place tank on 
flat, stable surface to prevent tipping or spilling.

Failure to use diesel fuel could cause injury and 
permanent damage to the unit. It may also void the 
Dri-Eaz warranty.

Altitude Adjustment 

NOTICE: The Dragon is factory-set for use at 
elevations up to 2000 feet above sea level. For use 
above 2000 feet or for any subsequent change of 
elevation, higher or lower, the unit must be adjusted by
a qualified HVAC technician to avoid excessive soot
build-up and possible flue fire. Always have a qualified
HVAC technician adjust the unit for operating at the 
altitude of the intended use.

Failure to adjust for 

altitude changes could cause injury, permanent
damage to the unit and secondary damage when
ducting into a structure. It may also void the Dri-
Eaz warranty.

Black or gray/white smoke coming from

the flue indicates an improper air to fuel ratio and that 
the unit must be adjusted. Call an HVAC specialist for 
assistance, or an authorized service center for referral
to an HVAC technician. For further questions, call Dri-
Eaz Service at 800-932-3030.

OVERVIEW

Introduction

The Dragon K85 Mobile Furnace is an indirect fired 
heater. It supplies heated air to an area without adding
any moisture or fumes through the heating process.
The Dragon is able to do this by using a heat 
exchanger so that the process air never comes into 
direct contact with the flame in the combustion
chamber.

The Dragon operates from outside the structure. It 
draws in the ambient outdoor air and increases its 
temperature by 81°F. An electric fan directs this
heated air into the structure through ducting. The 
remote thermostat automatically cycles the Dragon on
and off to maintain a preset temperature in the 
affected area.

The clean, dry heat from the Dragon helps reduce
drying times while maintaining stable and comfortable
temperatures. The Dragon is ideal for any number of 
applications, including:

x

water damage restoration

x

 new 

construction drying

x

 unheated jobsites

x

temporary event shelters

x

any situation calling for clean, dry heat

Principles of Use

For applications like water damage restoration and
new construction drying, the Dragon can increase
drying efficiency.

07-00407F  02/2008

1

Copyright 2006 Dri-Eaz Products, Inc. 

Summary of Contents for Dragon K85 Mobile

Page 1: ...damage to the unit It may also void the Dri Eaz warranty Altitude Adjustment NOTICE The Dragon is factory set for use at elevations up to 2000 feet above sea level For use above 2000 feet or for any...

Page 2: ...n mind there are some general principles to keep in mind when using the Dragon You should try to stabilize the temperature of the affected area near the ideal operating temperature of your drying equi...

Page 3: ...ace the unit on a level stable surface Choose an inconspicuous location away from high traffic areas for children and or pets Ensure there is no obstruction in the air intake during the use of the Dra...

Page 4: ...be approximately 90 degrees apart Drill two 1 8 inch holes in the flue 3 Drive a sheet metal screw 8x1 through each hole to secure the flue to the Dragon Secure the flue to the Dragon with sheet meta...

Page 5: ...lable at most hardware stores into the hole in the plywood Secure the duct adapter to the plywood 4 Slip a hose clamp not included over the free end of one of the 30 foot lengths of 8 inch diameter al...

Page 6: ...hole will do 3 Place a TurboDryer Vortex Axial Fan or other airmover so that it forces air out of the affected area to the outdoors through the selected opening The airmover should remove at least 800...

Page 7: ...example with a setpoint of 85 F the Dragon will stop heating when the temperature exceeds 85 F Use the arrows to choose a setpoint Use the arrows to choose a setpoint 3 Press the SET key again to acc...

Page 8: ...ed airflow To help prevent thermal overload you should x Make ducting runs as straight as possible x Keep the ducting free of debris and unobstructed x Keep the air intake grill unobstructed Restartin...

Page 9: ...event moisture or contaminants from getting into fuel Connecting an external fuel tank WARNING Diesel fuel is flammable and potentially explosive Always turn off and unplug the Dragon before switching...

Page 10: ...f you are ventilating spaces adjacent to living areas you must still create a negative pressure in the affected area This will help prevent contaminants from being forced into clean areas See the sect...

Page 11: ...voir during operation To do this set the Dragon up outside and allow to run in HEAT mode for several minutes If the reservoir does not leak proceed to step 9 If the reservoir leaks turn off and unplug...

Page 12: ...ne shut off valve by turning the red knob counter clockwise 9 Before replacing the housing cover check for leaks around the pump cover during operation To do this set up the Dragon outside and allow t...

Page 13: ...em Flame Safety Control Button will illuminate FS Wait one minute and then press the illuminated Flame Safety Control Button Air bubbles in fuel oil line especially on first start up FS Press the Flam...

Page 14: ...ervice center or HVAC specialist Black white exhaust Air intake vents are dirty or obstructed AST Avoid setting up unit where the intake could be blocked or restricted i e tall grass deep snow etc Blo...

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