Dri-Eaz F507 Owner's Manual

Owner’s Manual

WARNING

Dragon Mobile Furnace

Model F507

DRI-EAZ PRODUCTS, INC.

15180 Josh Wilson Road, Burlington, WA 98233

Phone: [phone] Fax: [phone] www.Dri-Eaz.com

The Dragon Mobile Furnace is an indirect fired furnace provi ding heated ai r for water damage restoration,

structural drying, construction, event shelters and other temporary heating applications.

READ AND SAVE THESE INSTRUCTIONS

Safety Information

Read this document carefully to learn how to properly
operate and service your Dragon Mobile Furnace. This
manual should be kept with the unit and remain with the
Dragon for the life of the product.

WARNING! Do not alter or modify your Dragon in
any way. Use only replacement parts authorized b y
Dri-Eaz Products, Inc. Modifications or use of
unapproved parts could create a hazard and will
void your warranty. Contact your authorized Dri-Eaz
distributor for assistance.

WARNING! 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.

WARNING! Check the Dragon for proper air-to-fuel
ratio at each location. Failure to adjust for altitude
changes could cause injury, permanent dam age to
the unit and secondary damage when ducting into a
structure. It may also void the Dri-Eaz warranty.
Refer to “Adjusting for Altitude,” p. 5, for
instructions.

• Do not stand closer than 8 ft. (2 m) from the outlet of
the heater. Do not lean or sit on the heater.

• Keep children and pets away.

• Make sure there is sufficient air circulation around

the unit during operation.

• Only do repair and maintenance after the heater has
cooled sufficiently and the heater is disconnected
from the electric power.

WARNING! Fire and Explosion Hazard

• Burner produces sparks and flame and unit
becomes hot during use. Hot surfaces can ignite f uel
vapors.

• Keep away from flammable vapors, such as tho se
from gasoline, paint thinner or solvents.

• Keep all flammable material away from the heater,
including combustible dusts, such as coal dust or
sawdust.

• Keep unit at least 8 ft. (2 m) away from any com­bustible material.

• Diesel fuel is flammable and can be explosive.

• Do not smoke while operating, servicing, or ref uel i ng

the Dragon.

• Before refueling, turn the unit off, allow it to cool, and
then unplug.

WARNING! Electric Shock Hazard

• Unit must be grounded. Use only with 3-hole
grounded outlet.

• Never modify plug or use an adaptor. If an extension
cord is needed, it must have a three-prong
grounding plug and be rated for outdoor use.

• Never operate the Dragon in pooled or standing
water. If electrical components become wet, allow
them to dry before using.

WARNING! Breathing Hazard. Fuel exhaust contains
deadly carbon monoxide gas. Operate the Dragon
only outdoors in open area. NEVER operate indoors
or in enclosed spaces.

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•

conditions. Use of the the external fuel pickup can
extend continuous operation up to 72 hours.

OVERVIEW

Introduction

The Dragon Mobile Furnace is an indirect fired heater.
This design keeps combustion air separate from heated
air and allows the Dragon to heat air without adding any
moisture, fumes or smoke. An electric fan directs heated
air into the structure through ducting. The remote
thermostat automatically cycles the Drag on on and off to
maintain a preset temperature in the target area.

Principles of Use

The clean, dry heat from the Dragon helps redu ce drying
times while maintaining stable and comfortable
temperatures. The Dragon is ideal for wide range of
applications, including

• water damage restoration

• new construction drying

• unheated jobsites

• temporary event shelters

• workshops, storage rooms, and warehouses

• greenhouses and polyurethane tunnels for

agriculture

• any situation calling for clean, dry temporary heat

For use in water damage restoration and new
construction drying, the Dragon can increas e drying
efficiency. The added heat from the Dragon will increase
the rate of evaporation by decreasing the relativ e
humidity of the affected area. Raising the temperature of
a drying area with the Dragon from 60° to 70°F can
increase the evaporative potential of your exi st ing drying
system up to 45 percent.

NOTE: The fuel lines must be adapted for use wit h the
external fuel pickup. See “Modifiying the Dragon for use
with the Fuel Pickup,” p. 7, for instructions.

The Dragon is designed to operate on no. 2 diesel. In
cold weather, you may add kerosene to the diesel as
described under “Cold temperature recommendations,”
below.

WARNING: Failure to use diesel fuel or a diesel­kerosene mixture as specified could cause injury
and permanent damage to the unit. It may also void
the Dri-Eaz warranty.

For best results, purchase fresh fuel from a reli abl e fuel
oil distributor. Keep the Dragon fuel tank full to help
prevent the formation of condensation inside the tank.
When not using the Dragon for extended periods of ti m e,
consider the addition of a diesel fuel stabili zer to the fuel,
available at most automobile parts stores.

Cold temperature recommendations

In temperatures below 23°F (−5°C), diesel tends to
thicken and may block the fuel filters. To improve fuel
flow characteristics in cold temperatures, a mixture
containing up to 15% kerosene may be used. The
Dragon may be operated with higher percentages of
kerosene up to 100% kerosene, but may require special
adjustments. Contact Dri-Eaz Service at 800-932-3030
for instructions.

To adjust for proper combustion and for use at high
altitudes, see “Adjusting for Altitude,” p. 5.

For best results when using the Dragon for restoration,
you should understand the basic principles of structural
drying. You can learn these skills in an IICRC-certified
Applied Structural Drying (ASD) course. To learn more
about ASD courses, contact the Dri-Eaz Education
Department at 800-932-3030.

Electrical requirements

The Dragon Mobile Furnace is designed to operate

on a 115V/60 Hz electrical connection. The unit requi res
10 amps. Make sure that the electrical outlet is a three
prong type grounded outlet. When using with an
extension cord, use only a grounded cord intended for
outdoor use and rated to deliver enough power to the
Dragon.

Run time and fuel type

The Dragon Mobile Furnace can operate for approxi­mately 13.5 hours on the built-in tank, depending on

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KEY

E. Control Panel

A. Air intake

F. Fuel fill and cap

B. Furnace exhaust flue

G. Fuel lev el indicator

C. Fuel filter and fuel line connectors

H. Fuel tank drain plug (not shown)

D. Heated air outlet with 12 in. duct mounting r ing

J. Heater access panel

Figure 1: Parts Identification

B

D

F E G

J

A

C

OPERATING THE DRAGON

Before First Use

Some assembly is required before using the Dragon.
See “Assembly Instructions,” p. 8.

Use of the Dragon with an external fuel tank (sold
separately) can significantly extend the run time.
Converting the Dragon for use with an external tank
requires a one-time modification of the external fuel line
connections. See “Modifying the Dragon for use with the
External Fuel Pick-up,” p. 7 for instructions.

Choosing a location

WARNING! Use the Dragon outdoors only. Place the
unit on a level, stable surface. Be sure to chock the
trailer wheels securely to prevent the unit from
rolling. Choose a location away from high-traffic
areas, children and pets, and ensure there are no
obstructions to the air intake.

CAUTION: Keep air intake vents clean and cl ear of any

obstruction. Avoid setting up unit in a location where the
intake could be blocked or restricted. Blocking t he air
intake will cause the unit to produce sooty exhaust,
potentially damaging the unit and the structure being
heated.

NOTICE: Install and operate the Dragon in ac cor dance
with all local and regional regulations. In Canada, refer
to CSA B139 and CSA B140-1962.

Fill the fuel tank

The Dragon is shipped with the fuel tank empty. Before
operating, fill the tank with no. 2 diesel or fuel oil. In cold
conditions, a diesel-kerosene mixture as described on
p. 2 may be used. The tank has a 13.5 gal. (51 L)
maximum capacity. Do not overfill.

CAUTION: Do not put gasoline, motor oi l , or any other
product in the fuel tank.

CAUTION: Do not fill the tank while the uni t is operating.

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FAILURE

Figure 2: Dragon Controls

Power cord

Thermostat remote

socket.

Fuel fill cap

Fuel gauge

Red light
indicates system
fault. See
Troubleshooting,
p. 7.

OVERHEAT
Amber light
indicates an
excessive
internal temp.
Fan will run
until unit is cool.
See Trouble­shooting, p. 7.

WORKING
Green light
indicates normal
operation. See
Troubleshooting,
p. 7.

RESET
Press to restart
after system
failure.

control cord

POWER
Provides power
to unit.

START
Press to start
burner.

Attaching ducting to the Dragon

The Dragon is supplied with one 25 ft. length of 12 in.
diameter (7.6 m × 30 cm) high-temperature ducting. This
ducting is used to direct the heat produced by the
Dragon into the structure. To attach the ducting to the
Dragon, locate the end of the ducting with the sewn-in
cuff and buckle. Attach the ducting to the hot air outlet
(Fig. 1) and secure it with the quick-connect duct clamp.

NOTE: If the duct clamp is too tight or too loose, adjust
the clamping force of the quick-connect duct clamp by
turning the clamp screw with a small screwdriv er.

Place the other end of the ducting into a suit abl e i nlet in
the structure. For best air flow rates avoid tight bends in
the ducting.

Securing ducting to the structure

In most drying situations you will need to attach the end
of the ducting to an opening in the structure such as a
basement window or crawlspace vent block. Since each
structure is unique, you will usually need t o bui l d an
adapter to fit the specific opening.

Operating the Dragon

Inspecting before operation

WARNING! Before starting the Dragon:

• Check for any fuel leaks around the fuel tank or fuel
lines.

• Check for nearby hazards like combustible mat erials
or flammable vapor sources.

• Check the power cord for damage.

Correct these and any other safety hazards before
starting the Dragon.

Starting the Dragon

1. Check the fuel tank. If needed, add diesel fuel to the
fuel tank. Do not overfill. See “Fuel Type,” p. 2, for
recommended fuels.

2. With the ducting secured to the hot air outlet, plug the
power cord into a suitable 115V outlet.

3. If you are using the remote thermost at, place the
thermostat sensor in the target area. See “Using the
Remote Thermostat” for instructions. To prevent
overheating of the drying environment, we
recommend using the thermostat at all times.

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4. Press the Power switch to the on position.

Fig. 3: To adjust for

“4” mark.

5. Press the Start switch to the on position.
The unit will begin operation.

CAUTION. Monitor the settings on the D ragon and
conditions in the structure at least once a day during
operation.

Controlling the temperature

The Dragon is supplied with a remote thermostat that
can be used to control the temperature in the target
area. To use the Dragon in thermostat mode, first plug
the thermostat cord into the socket in the control panel
(Fig. 2). Then set the desired temperature on the
thermostat control for a maximum of 100°F (38°C) and
place the control in the target area.

To prevent overheating of the drying environment, we
recommend using the thermostat at all times.

Special Instructions

Adjusting for Altitude

The combustion air intake control for the furnace is
factory set for operation at sea level. To assure proper
operation and maximum performance at higher altitudes,
it may be necessary to adjust the combustion air/fuel
mixture.

The best guide to proper air/fuel mixture is exhaust
color. The Dragon exhaust should always be clear.
Black or white smoke indicates an improper ai r/fuel
mixture:

a) If the exhaust is clear, no adjustment is needed.
b) If the smoke is dark or black, there is not enough air
in the mixture.
c) If the smoke is white, there is too much air and not
enough fuel in the mixture, or there is water in t he fuel.

Shutting the Dragon Off

First, switch the START button to the “Off” position. If the
unit is still warm, the fan will run for approxi m ately 1½
minutes to cool down the unit. When the fan turns off,
turn the POWER to the “Off” position.

CAUTION: Do not unplug the unit or otherwise turn off
the power until the fan stops operating. Failure to let the
unit complete the cooling cycle could damage t he heat
exchanger and will not be covered under warranty .

altitude: Use air
adjust-ment collar.
Loosen bolt and slide
collar to adjust.
Factory setting is the

If the smoke color is either black or white, follow
these steps to adjust the air/fuel ratio.

1. Open the access cover by removing the screws. Lift
cover and set aside. The hood is hinged on one side.

2. The AIR ADJUSTMENT COLLAR is located on the
burner assembly. The factory setting is 4. See Fig. 3.

3. Loosen the adjustment nut and slide the collar in the
appropriate direction:

a) A lower number corrects for black smoke (allows
more air into the combustion chamber);
b) A higher number corrects for white smoke (allows
less air into the combustion chamber).

4. Tighten the shutter adjustment s cre w, replace the
hood, secure hood with the sheet metal screws.
Restart the unit and check for proper operation.

WARNING: Replace access cover to test after each
adjustment. Do not operate the unit without the hood
securely in place as serious injury could r esult.

NOTE: If the exhaust remains white even when adjusted

to the 10 mark, there is probably water in the fuel. You
may need to replace the fuel filter and/or clean the fuel
tank (p. 6).

Always adjust the Dragon so that it produces clear
exhaust.

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Thermal overload protection

The remote thermostat provided with the Dragon is
factory set to limit the maximum room temperature to
100°F (38°C). We recommend that you always use the
thermostat, as this can help to prevent overheating of
and possible damage to the drying environment .

For additional safety, the Dragon is fitted wit h an internal
high temperature limit switch. If the heat exchanger
reaches 356°F (180°C), the limit switch will shut down
the Dragon and the OVERHEAT light will glow amber
(Fig. 2). In this case, the burner will automatically turn off