© 2018, Obelis S.A Registered Address: Bd. Général Wahis, 53
1030 Brussels, Belgium
NEVER LEAVE HEATER UNATTENDED WHILE CONNECTED TO A POWER SOURCE
Operation
This heater is factory-tested for use with 1-K kerosene/paraffin, 
no. 1 & no. 2 diesel, JP8/Jet A Fuel, and no. 1 & no. 2 fuel oil.
TO START THE HEATER:
1. Fill the tank with paraffin until fuel gauge points to “F”.
2. Be sure fuel cap is secure.
3. Plug power cord into electrical outlet.
4. Turn thermostat control knob to desired temperature setting 
(70/125/175/215 only).  The setting range is from 5
°
C to 45
°
 
C. Push the Power switch to the “ON” position. The power 
indicator lamp and room temperature display (125/175/215 
only) will light and the heater will start.
Optimum pressure occurs when the nose cone is cherry red 
and there are no extending flames from the heater.
NOTE: The room temperature display (125/175/215 only) will 
indicate the following:
-  When temperature is less than -17
°
 C, display says “LO”.
-   When temperature is above 37
°
 C, display says “HI”.
-   Between -17
°
 and 37
°
 C display shows actual temperature.
TO STOP THE HEATER: Turn the Temp. Setting Knob to left,  
turn the Power Switch to “OFF” position, and unplug the Power 
Cord.
TO RESTART THE HEATER
1. Wait ten seconds after shutting off heater.
2. Turn the Power Switch to “ON” position.
3. Be sure to follow all starting procedure precautions.
LONG TERM STORAGE
Drain Fuel Tank
1. For models ST-45/70T-KFA-E, drain fuel through the 
fuel cap opening using an approved siphon. For models 
ST-125/175/215-KFA-E, drain fuel through the Drain Plug at 
the bottom of the Fuel Tank.
2. To remove the Drain Plug (125/175/215), pull the Plug Grip 
downward and remove seal head from drain hole in tank.
3. Rinse and completely empty the tank.
4. To replace, push the drain head fully into the drain hole and 
secure by pushing the seal cap fully into the head hole.
IMPORTANT: Never store leftover fuel over the summer. 
Using old fuel can damage your heater.
Store heater in a dry, well-ventilated area! If your heater  
cannot be stored indoors, a tarp or weatherproof cover must be 
used to protect the heater.
Be sure that the storage area is free of dust and corrosive 
vapors. Repack the heater in the original shipping material. Keep 
the Users Manual in an easily accessible place.
Maintenance
Always service heater in a clean, flat, dry area. Never service 
heater while it is plugged in or while hot!
Never service heater in wet conditions. In an emergency, be 
sure heater has completely cooled before servicing using a 
tarp or weatherproof cover, to ensure heater or electronics 
inside heater are not exposed to wet conditions. Do not 
service heater while plugged in under any circumstance.
FUEL/FUEL TANK: Flush every 200 hours of operation or as 
needed with paraffin. 
AIR FILTERS: Open heater lid to access filters. Filters should 
be replaced every 500 hours of operation, or less, depending on 
conditions.  See figure 7.1 on page 7 for detailed view.
FAN BLADES: Open heater lid to access fan blades.  Blades 
should be cleaned at least once per heating season.  See figure 
6.1 on page 7 for detailed view.
NOZZLES: Open heater lid and remove burner head to access 
nozzle. Nozzles should be cleaned or replaced at least once per 
heating season. See figure 3.1 on page 7 for detailed view.
SPARK PLUG: Open heater lid to access spark plug. Clean and 
re-gap every 600 hours of operation, or replace as needed.  
Re-gap the terminals to 3.5mm.  See figure 3.1 on page 7 for 
detailed view.
PHOTOCELL: Open heater lid to access photocell. The Photocell 
should be cleaned at least once per heating season or more 
depending on conditions.  See figures 4.1 and 5.1 on page 7 for 
detailed view. 
After servicing your heater you should perform the following  
function check before commissioning this heater:
 - check the air and fuel lines for leaks using a 50/50 soap  
solution
 - check extension cord for wear, cracks or cuts
 - check to see igniter lines are connected securely to spark plug
 Improper maintenance can lead to poor combustion and 
soot production.  Never alter or modify the heater.  Use 
only genuine parts from the manufacturer or sales agent 
for repair and maintenance on your heater, and contact the 
manufacturer or sales agent before replacing parts other 
than those specified or recommended.
PUMP PRESSURE ADJUSTMENT:
While heater is operating, turn relief valve clockwise to increase, 
counterclockwise to decrease. Use flat blade screwdriver to turn 
valve. Correct pump pressure is on page 2.
This appliance is not intended for use by persons  
(including children) with reduced physical, sensory or 
mental capabilities, or lack of experience and  
knowledge, unless they have been given supervision 
or instruction concerning use of the appliance by a 
person responsible for their safety. Children should 
be supervised to ensure that they do not play with the 
appliance.
If the power cord is damaged, it must be replaced by 
the manufacturer, its service agent or similarly  
qualified persons in order to avoid a hazard.
Figure 2. Start The Heater
On / Off Switch
LED Operating 
Time/ Temp
Temp Setting Knob
LED - Fuel Gauge