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O. COMPRESSED AIR/OIL ATOMIZER
The Hauck high pressure oil nozzle is designed to finely atomize No. 2 fuel oil and clean preheated
No. 4, No. 5 and No. 6 fuel oil. Oil viscosity should be 90 SSU (1.8 x 10
fuel oil and heat trace piping using No. 4, No. 5 and No. 6 fuel oil to achieve 90 SSU oil at the
burner (see Compressed Air/Oil Adjustment).
Care should be taken to insure that the air and oil supplied to the burner are free of dirt particles
and water. Purge oil and air lines before connecting them to the compressed air/oil insert. The
nozzle should be inspected and cleaned before the start of each session and possibly more
depending on the cleanliness of the air and fuel.
COMPRESSED AIR PIPING
1. The compressed air supply line must be of adequate size (see Table 10) and be a dedicated
line from the compressor to the burner compressed air inlet. For longer runs than those listed
in the table, increase the hose by one pipe size. Before attaching lines, purge the hose to
remove any dirt that could clog and damage the oil atomizer.
MegaStar
Model No.
2. Compressed air requirements are listed in Table 11. Compressed air must be supplied to
the inlet of the compressed air manifold at a minimum of 90 psig (620 kPa). The
compressed air regulator modulates the compressed air flow as oil flow is modulated to
reduce compressed air consumption at lower firing rates.
The compressed air low supply pressure switch and low
atomizing pressure switch must both be interlocked with
the burner's oil safety shutoff valves.
The compressed air solenoid valve is normally wired in
parallel with the burner's safety shutoff valves.
Reference the control panel drawings for wire and/or
terminal numbers.
TM
75-100
3/4 NPT (DN20)
125-150
1 NPT (DN25)
Table 10. Flexible Air Hose Size Requirements
Min. Hose
Size
NOTE
Page 22
MS-9
-5
2
m
/sec) or less. Preheat
Max. Hose
Length
70 ft (21m)
160 ft (49m)
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