Energy Tech Laboratories 40 Series ユーザーズマニュアル

bleeding the pump through a clear tube.  There must be 
no froth visible.  There are various test kits available to 
enable you to look at the oil through clear tube.  There 
must be no froth visible.  There are various test kits 
available to enable you to look at the oil through clear 

tubing adapted to the supply line at the pump fitting.  
Air eliminators are on the market that have potential.  
Also, electronic sight glasses are being used with good 
success.  At times, new tubing must be run to the tank 

or new fittings put on.  Just make sure you get the air 
out before you leave.

 

Any air leaks in the fuel line will cause an unstable 

flame and may cause delayed ignition noises.  Use only 

flare fittings in the fuel lines.
4.  GASKET LEAKS — If 11.5 to 12.5% CO

2

 with a 

#1 smoke cannot be obtained in the breeching, look 
for air leaks around the burner mounting gasket, 
observation door, and canopy gasket. Such air leaks 
will cause a lower CO

2

 reading in the breeching. The 

smaller the firing rate the greater effect an air leak 
can have on CO

2

 readings.

5.  DIRT — A fuel filter is a good investment. 

Accidental accumulation of dirt in the fuel system 
can clog the nozzle or nozzle strainer and produce a 
poor spray pattern from the nozzle. The smaller the 

firing rate, the smaller the slots become in the nozzle 
and the more prone to plugging it becomes with the 
same amount of dirt.

6.  WATER — Water in the fuel in large amounts will 

stall the fuel pump. Water in the fuel in smaller 
amounts will cause excessive wear on the pump, 
but more importantly water doesn’t burn. It chills 

the flame and causes smoke and unburned fuel to 
pass out of the combustion chamber and clog the 

flueways of the boiler.

7.  COLD OIL — If the oil temperature approaching 

the fuel pump is 40°F or lower poor combustion or 
delayed ignition may result.  Cold oil is harder to 
atomize at the nozzle. Thus, the spray droplets get 

larger and the flame shape gets longer. An outside 
fuel tank that is above grade or has fuel lines in a 
shallow bury is a good candidate for cold oil. The 
best solution is to bury the tank and lines deep 
enough to keep the oil above 40°F.

8.  FLAME SHAPE — Looking into the combustion 

chamber through the observation door, the flame 
should appear straight with no sparklers rolling up 

toward the crown of the chamber. If the flame drags 
to the right or left, sends sparklers upward or makes 
wet spots on the target wall, the nozzle should be 
replaced. If the condition persists look for fuel leaks, 
air leaks, water or dirt in the fuel as described above.

9.  HIGH ALTITUDE INSTALLATIONS
 

Air settings must be increased at high altitudes. Use 

instruments and set for 11.5 to 12.5% CO

2

.

10. START-UP NOISE — Late ignition is the cause of 

start-up noises. If it occurs recheck for electrode  

 settings, flame shape, air or water in the fuel lines.

11. SHUT DOWN NOISE — If the flame runs out of air 

before it runs out of fuel, an after burn with    
noise may occur. That may be the result of a faulty 
cut-off valve in the fuel pump, or it may be air 

trapped in the nozzle line. It may take several firing 
cycles for that air to be fully vented through the  

nozzle. Water in the fuel or poor flame shape can also 
cause shut down noises.

  ATTENTION TO BOILER WHILE NOT IN 

OPERATION

1.  IMPORTANT

 

IF BOILER IS NOT USED DURING WINTER 
TIME, IT MUST BE FULLY DRAINED TO 
PREVENT FREEZE DAMAGE.

2.  Spray inside surfaces with light lubricating or 

crankcase oil using gun with extended stem so as to 
reach all corners.

3.  With steam boilers, at end of season add sufficient 

water to fill boiler to top of water column and leave 
it that way until fall when water should be drained 
again to proper level.  If, at this time, boiler water 

is dirty, drain water, flush out boiler, and refill with 
clean water to prescribed water level.

4.  Always keep the manual fuel supply valve shut off 

if the burner is shut down for an extended period of 
time.

5.  To recondition the heating system in the fall season 

after a prolonged shut down, follow the instructions 
outlined in Section IV, Paragraphs A through K.