49-043 F 2011-06 Warranty 07-00424
5
Dri-Eaz Products, Inc.
WARNING: Replace hood to test
after each adjustment. Do not
operate the unit without the hood
securely in place. Serious injury
could result.
1. Open hood by removing sheet
metal screws and lifting. The hood
is hinged on one side.
2. The AIR ADJUSTMENT SHUTTER
(Fig. 2) is located on the burner
assembly. The factory setting is 5.
3. Loosen screw and rotate the
shutter in the appropriate direction:
a) A
higher
number
corrects for
black smoke
(allows more air into
the combustion chamber);
b) A
lower
number
corrects for
white smoke
(allows less air).
4. Tighten the shutter adjustment
screw, replace the hood, reattach
hood with the sheet metal screws,
and check for proper operation.
Tip:
If the exhaust remains white even when adjusted to
0 (zero), 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.
Thermal overload protection
The Dragon is automatically protected against internal
overheating. If the temperature of the heat exchanger
exceeds 175°F (79.4°C), the burner will automatically
turn off. The blower will continue to operate until the heat
exchanger has cooled. Once the exchanger has properly
cooled, the burner will automatically come back on and
the Dragon will resume normal operation.
For additional safety, the Dragon is also fitted with a high
temperature limit switch. If the heat exchanger reaches
205°F (96.1°C), the limit switch will shut down the
Dragon completely. The Dragon will not operate until the
limit switch is manually reset.
To manually reset the Dragon after a thermal
overload shutoff,
1. Open the hood: by removing sheet metal screws and
lifting. The hood is hinged on one side.
2. Turn the CONTROL KNOB to “Thermostat”.
4. Press in the red HI-TEMP LIMIT switch (Fig. 1, D).
5. Replace the hood. The Dragon may now be restarted.
If the thermal overload switch or the high temperature
limit switch will not reset, contact the Dri-Eaz Service
Department at 800-932-3030 for assistance.
Note
: T
he most common cause of thermal overload
is restricted airflow.
To help prevent thermal overload,
you should
•
Make ducting runs as straight and short as
possible
•
Keep the ducting free of debris and
unobstructed
•
Keep the air intake grill unobstructed
Restarting after running out of fuel
If the Dragon runs out of fuel, a fuel cutoff sensor will
automatically shut the heater off and the BURNER
RESET BUTTON (Fig. 1, G) will glow red. The fan may
continue to cycle on and off until cooling is completed.
Follow these instructions for restarting.
Tip:
It may be necessary to repeat these steps three or
four times until the fuel pump can refill the fuel lines and
provide sufficient fuel for heater operation.
1. Turn the CONTROL KNOB to the off position.
2. Refill fuel tank.
3. Turn the CONTROL KNOB to the “thermostat”
position.
4. Open hood by removing sheet metal screws and
lifting. The hood is hinged on one side.
5. Press the BURNER RESET BUTTON once
thenreplace the hood. The fuel pump will begin
pumping fuel through the fuel line and the burner
should ignite after 20 seconds.
5. If the pump turns off before the burner ignites, the
reset button must be pushed again. This occurs
Setting 5
(factory setting):
0–5000 ft.
Bleed valve
Air shutter adjustment screw.
Loosen to adjust shutter.
Fig. 2: Air Adjustment Shutter and Bleed Valve
BURNER RESET BUTTON
0
10
5
