Dri-Eaz Dragon 3600, Dragon 3600 F535 115V, Dragon 3600 F535-230V, Dragon 3600 F535-230V UK, Dragon 3600 F535-230V AU Owner's Manual

Owner’s Manual

WARNING

Dragon 3600 Mobile Fur nace

DRI-EAZ PRODUCTS, INC.

15180 Josh Wilson Road, Burlington, WA 98233

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

The Dragon 3600 Mobile Furnace is an indirect fired furnace providing heated air for water damage

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

READ AND SAVE THESE INSTRUCTIONS

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! Do not alter or modify this unit in any
way. Use only replacement parts authorized by Dri­Eaz Products, Inc. Modifications or use of
unapproved parts could create a hazard and will
void your warranty. Contact your authorize d Dri­Eaz distributor for assistance.

Model F535-115V

• Keep away from combustible dusts, such as coal
dust or sawdust.

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

• Keep children and pets away.

• Diesel fuel is flammable and can be explosive.

• Do not smoke while operating, servicing, or

refueling the Dragon.

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

• Hot surfaces can ignite fuel vapors.

WARNING! Electric Shock Hazard

• Connect to 115V power supply using either a 12/3
× 50 ft. (15 m) max or 10/3 × 100 ft. (30 m) max
extension cord.

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

• Never modify plug, extension cord or use an

adaptor.

• Never operate the unit in pooled or standing water .

If electrical components become wet, allow to dry
before using.

WARNING! Check the Dragon 3600 for proper air­to-fuel ratio before each use. Failure to adjust for
altitude changes could cause injury, perm anent
damage to the unit and secondary damage when
ducting into a structure. It may also void the
Dri-Eaz warranty. Refer to “Adjusting for Proper
Combustion and Altitude,” p. 5, for instruc tions.

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.

WARNING! Fire and Explosion Hazard

• Burner produces sparks and flame and unit
becomes hot during use.

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

Product identification

An identification plate is attached to the side of the
unit. The plate shows the year of production, serial
number, electrical supply requirements, airflow, fuel
capacity, and a production code.

BEFORE YOU BEGIN

Warranty registration

Visit warranty.drieaz.com to register your purchase.
Registration allows us to better assist you with using,
maintaining or servicing your equipment and to contact
you in case we have important safety information
concerning your Dri-Eaz product. If you determine
service is required, have your equipment model, serial
number and original proof of purchase available and
call your distributor for assistance with obtaining a
return material authorization (RMA).

Control panel

Fuel drain under

Air adjustment

Fig. A: Parts Identification

Air intake

Flue opening (stack
not shown)

Handle

Heated air outlet

Fuel filter

Fuel fill and cap

Weather shield

Burner reset

access plate.

dial

and duct ring

OVERVIEW

The Dragon 3600 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.

The Dragon should always be operated outdoors, and
should utilize outside air for combustion. 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 target area.

Principles of Use

The clean, dry heat from the Dragon helps reduce
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 increase drying
efficiency. The added heat from the Dragon will
increase the rate of evaporation by decreasing the
relative humidity of the affected area. Raising the
temperature of a drying area with the Dragon from 60°

Fuel level sight

to 70°F can increase the evaporative pote nti al of your
existing drying system up to 45 percent.

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

tank (not s hown)

GROUNDING INSTRUCTIONS

The Dragon 3600 Mobile Furnace is designed to
operate on a 115V/60 Hz electrical connection. The

unit requires 9.2 amps. Make sure that the electrical
outlet is grounded with three prongs. Use with a
grounded extension cord intended for outdoor use and
rated to deliver enough power to the Dragon.

WARNING! Improper connection of the equipme n t­grounding conductor can result i n a risk of electric
shock. Check with a qualified electrician or service
person if you are in doubt as to whether the
outlets are properly grounded. Do not modify the
plugs provided with the appliance – if the plugs do
not fit the outlets, have proper outlets installed by
a qualified electrician.

This equipment is for use on circuits with a nominal
rating of no more than 120V.

This unit is intended for household and commercial
use.

HANDLE THE UNIT CAREFULLY

Always operate the unit on a stable, level surface. Do
not drop, throw, or place where it could fall. Rough

treatment can damage the unit, and may

Fig. B: Weather Shield and Handle Installation

Slide handle into slots
pins provided.

Place lower brackets over
upper posts.

create a hazardous condition or void the
warranty.

FUEL TYPE

The Dragon is designed to operate on
diesel fuel. In cold weather, add 4 oz.
Diesel Guard™ for each tank of fuel. See
“Cold weather recommendations” below.

WARNING: Failure to use diesel fuel
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 reliable fuel distributor. Keep the
Dragon fuel tank full to help prevent the
formation of condensation ins ide the tank.
When not using the Dragon for extended periods of
time, we recommend the addition of Diesel Guard fuel
stabilizer as described below.

Cold weather recommendations

To optimize fuel quality and improve performance in
cold condtions use 4 oz. Diesel Guard anti-gel deicer
additive in each full tank of fuel. This product helps to
prevent fuel gelling and freezing problems in cold
conditions. The treatment also has anti-corrosion
properties and provides additional lubricity, while
detergents help to keep the burner nozzles clean and
operating efficiently. Follow lable instructions for
proper use. Additional quantities of Diesel Guard may
be purchased from your Dri-Eaz distributor.

Increasing temperature rise

In normal operating conditions (above 35°F / 2°C), the
weather shield can be removed when operating the
Dragon. However, when operating the Dragon in
extremely low outdoor temperatures (below

2°C) the temperature of the heated air can be

35°F /
increased by leaving the weather shield in place during
operation. Note that removing the weather shield
increases airflow by about 100 CFM but will reduce the
Dragon’s heat output.

posts and then lower over

and secure with clevis

BEFORE FIRST USE

The unit is shipped with an Accessory Kit that includes
the following 1) Heat outlet duct ring, 2) 25 ft. / 7.6 m
of heat resistant semi-rigid ducting, 3) a handle and 2
locking clevis pins, 4) weather shield, and 5) exhaust
stack and rain cap. A heat sensor cable is permanently
attached to the unit and is ready for use.

Install Handle

Insert handle into slots on the sides of the fuel tank.
Insert clevis pins on both sides and secure with clip.
See Fig. B.

Install Heat Outlet Duct Ring

Install on the heat outlet using the 8 screws provided.

Install Weather Shield

Place shield over lower posts first, then lower into
place over the the two upper pegs. See Fig. B.

Setting up the Dragon

Choosing a location

WARNING! Use the Dragon outdoors only. Place
the unit on a level, stable surface. Be sure to
chock the 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.

NOTICE: Keep air intake vents clean and clear of any

obstruction. Avoid setting up unit in a location where
the intake could be blocked or restricted. Blocking the
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
accordance with all local and regional regulations.

Fill the fuel tank

The Dragon is shipped with the fuel tank empty.
Before operating, fill the tank with diesel. Do not
overfill.

In freezing conditions, see “Cold weather

Fig. C: Control Panel

Power cord
connection

Control knob

Temperature
control knob

Thermostat

recommendations,” p. 3.
NOTICE: Never use gasoline or crankcase

drainings for fuel.
NOTICE: Do open the fuel cap or fill the tank
while the unit is operating.

Attach exhaust stack

Before operating the Dragon, affix the
provided exhaust stack with rain cap to the flue
opening by slipping the stack over the flue
opening (Fig. A). If the stack does not fit
snugly, drive small sheet metal screws through
the base of the stack into the exhaust outlet to
secure the stack. To prevent damage to the
unit, remove the stack when transporting the
Dragon.

NOTICE: Do not operate the Dragon without the
exhaust stack in place.

Install ducting

1. Attach the ducting on the heated air outlet (Fig. A)
and secure it with the clamp provided.

2. Place the other end of the ducting into a suitable
inlet in the structure.

Place thermostat sensor

Place the thermostat sensor into the space being
heated. For more accurate control, we recommend
placing the sensor in an area where the air is flowing
freely. The burner will automatically turn off when the
temperature in the monitored area reaches the
setpoint, or a maximum of 105°F (41°C), in order to
help operators comply with the RIA Safe Harbor
clause.

Plug in unit

Use an extension cord to connect the unit to a 115V
circuit rated for at least 15 amps. The cord plug will
glow when electricity is present.

OPERATING THE DRAGON

Inspect 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
materials 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. See Fuel Type (see p. 3) for
fuel requirements.

sensor cable

2. Turn the CONTROL KNOB to the Heat position
(Fig. C).

You will hear the burner ignite. The burner wil l operat e
a few minutes until the internal heat exchanger
reaches operating temperature. Then the fan will turn
on and the unit will begin producing heat.

NOTE: It is normal to see a small amount of smoke
when starting or stopping the unit. If smoke continues
for more than a few seconds, turn of the unit and see
“Adjusting for proper combustion and altitude,” p. 5.

NOTE: At temperatures of 35°F (2°C) or below, wait
25–30 minutes after plugging in the unit before turning
the CONTROL KNOB to Heat. This allows time for the
burner nozzle preheater to bring the fuel up to the
correct operating temperature.

NOTICE. Monitor the settings on the Dragon and
conditions in the structure at least once a day to
ensure proper operation.

Controlling the temperature

Set the desired temperature F on the THERMOSTAT
control from a range of 70–105°F (21–41°C).

Continuous Fan-Only operation

To provide continuous unheated air, set the
CONTROL KNOB to the Fan postion. The burner does
not operate in this mode.

NOTICE: Physically check the Dragon at least once a
day during operation. Check for leaks, and observe the
exhaust smoke to ensure that it is still clear. Adjust as
necessary for proper operation.

Turning the unit off

Turn the CONTROL KNOB to the “Off” position.

NOTICE: Do not unplug the unit or otherwise turn off

Fig. E: Air Adjustment Dial

Loosen nut to

Dial rotation:

More air

Less air

Fig. D: Burner Reset Button

Burner Access
Burner Reset Button

the power until the fan stops operating, as this may
interrupt the cooling cycle. Failure to let the unit
complete the cooling cycle could damage the heat
exchanger and will not be covered under warrant y.

SPECIAL INSTRUCTIONS
Unit has run out of fuel

WARNING: Replace Burner Access Plate after
each adjustment. Do not operate the unit without
the hood securely in place. Serious inju ry could
result.

1. Turn the CONTROL KNOB to the “Off” position
(Fig. C).

2. Open Burner Reset Access Plate by rem oving the
four retaining bolts (Fig. A).

3. Click the BURNER RESET button once quickly
(Fig. D).

4. Turn CONTROL KNOB to the Heat position. The
burner should start as normal.

5. If the burner does not start, repeat steps 1, 3–4.

6. If the burner does not start after two or three
attempts, press and hold the BURNER RESET for
15+ seconds. This initiates a system reset and will
purge the fuel line of any air.

7. The unit will resume normal operation.

Replace the Access Plate.
If unit will not reset after several attempts, contact your

Dri-Eaz distributor for assistance.

Adjusting for proper combustion and
altitude

The combustion air intake control for the furnace is
factory set for operation at altitudes ranging from sea
level to about 5000 ft. (1500 m). 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 exhaust should always be
clear. Black or white smoke indicates an improper
air/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 the
fuel.

Plate (removed).

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

The AIR ADJUSTMENT DIAL (Figs. A, E) is located
on the side of the unit above the fuel filter.

1. Loosen bolt and rotate the shutter in the appropriate
direction:

a) A larger opening corrects for black smoke
(allows more air into the combustion chamber);
b) A smaller opening corrects for white smoke
(allows less air).

2. Tighten the dial bolt when adjustment is complete

TIP: If the exhaust remains white even after adjusting
to the smallest opening, there is probably water in the
fuel. You may need to replace the fuel filter and/or
clean the fuel tank (see Maintenance, p. 6).

NOTE: It is normal to see a small amount of smoke
when starting or stopping the unit.

Thermal overload protection

The unit is automatically protected against internal
overheating. If the internal temperature of the heat
exchanger exceeds a preset val ue, the burner wil l
automatically turn off. The blower will continue to
operate until the heat exchanger has cooled. Once the

(located on burner)

adjust air flow.

exchanger has properly cooled, the burner will

3. Service the burner, heat

chamber.

Dragon 3600 Portable Heater
F535

65 × 43 × 24 in.

1.9 × 1.4 × 3.0 m

680 CFM w/Weather Sheild
780 CFM w/out Weather Sheild

Specifications are subject to change without notice. Some
values may be approximate.

automatically come back on and the Dragon will
resume normal operation.

Note: The most common cause of thermal
overload is restricted airflo w. To help prevent

thermal overload, you should

• Make ducting runs as straight and short as
possible

• Keep the ducting unobstructed and free of
debris

• Keep the air intake grill unobstructed

MAINTENANCE

NOTICE: Always turn unit off and unplug before
performing any maintenance.

DESCRIPTION INTERVAL

1. Clean the fuel tank.

2. Replace the fuel filter.

exchanger, and combustion

4. Clean the housing

1. Clean the fuel tank.

a. Place an appropriate container beneath the drain

plug to catch any fuel.
b. Remove the drain plug with a wrench.
c. Allow the tank to drain completely.
d. Replace the drain plug.
e. Dispose of waste fuel in accordance with loca l

regulations.

WARNING! Diesel fuel is flammable and potentially
explosive. Always turn off and unplug the Dragon
before draining the fuel tank. Keep away from
open flame.

2. Replace the fuel filter

Replace the fuel filter once a year. Unscrew the filter to
remove it. Replacement fuel filters may be purchased
from most automotive supply retailers. Ask for Wix
part. no. 24104 or equivalent. Have rags or paper
towels on hand to clean up any spills, and dispose of
the filter and waste fuel according to local regulations.

Yearly

As needed/Yearly

Yearly.

HVAC technician only.

As needed/Yearly

®

3. Service the burner, heat exchanger and
combustion chamber

These components should be inspected and serviced
by a qualified HVAC technician once a year. Contact
your local distributor for the location of a service center
near you.

4. Clean the housing

Use a cleaner with a degreasing agent such as
Unsmoke Degrease-All to clean the housing as
needed.

Service

For parts and service contact your local distributor.
Copies of the Dragon manual and related information
are available at www.Dri-Eaz.com. Go to
warranty.Dri-Eaz.com to register your purchase.

Accessories Included

1 25 ft. (7.6 m) section of 12 in. (30 cm) high-

temperature ducting.
1 Hinged buckle ducting clamp
1 50 ft. (15.3 m) thermostat sensor cable with sensor.
1 Exhaust stack and rain cap
1 Owner’s Manual

SPECIFICATIONS

Model
Dimensions (W × H × D)

Weight (empty) 250 lbs. | 113 kg
Weight (full) 495 lbs. | 225 kg
Power 9.2 amps, 115 volt, 60 Hz
Net heat output 120,000 BTU/hr | 29.3 kWh

Airflow
Fuel tank capacity 32 gal. | 208 liter maximum

Fuel type Diesel
Fuel consumption rate .8 gal./hr | 3.1 liter/hr
Fuel pump pressure 140 psi | 966 kPa