Honeywell Hauck MEGASTAR MS-25 Instructions Manual page 15

MegaStar™
Model No.
25
50
75
100
125
150
Table 9. Nominal Light and Heavy Fuel Oil Pressure to Burner Manifold Inlet
4. The low/high oil pressure switch is factory set at a low set point of 15 psig (1.03 bar)
and a high set point of 80 psig (5.5 bar). Set point adjustments may be required
depending on the burner and fuel piping specifics.
5. Inspect the complete fuel oil system for oil leaks and repair as necessary. Do not
operate the burner until all fuel leaks are repaired.
6. The burner oil flow control (metering) valve is preset to travel from position 2 to 11.
The low fire oil flow setting can be changed by loosening the coupling connecting the oil
valve to the control motor, adjusting the oil valve pointer, and re-tightening the coupling. The
high fire oil flow setting can be changed via the burner control system, or if necessary, by
increasing or decreasing fuel oil pressure. See the individual burner performance sheets for
fuel oil flow data.
Any adjustment to the fuel oil flow settings should be
made as a minor incremental change and verified that it
has not resulted in any detrimental effect to plant
operation prior to making another adjustment.
7. Fuel oil flow rates can be checked with the in-line oil flow meter on the burner fuel
oil manifold. The flow meter glass can be rotated to view the scale if required.
Nominal Oil Pressure
w/Low Pressure Atomizer
30 psig (4.14 bar)
75 psig (5.15 bar)
75 psig (5.15 bar)
85 psig (5.85 bar)
65 psig (4.50 bar)
80 psig (5.50 bar)
CAUTION
NOTE
Fuel oil flow settings per the individual burner
performance sheets are for initial set-up only.
Final settings may have to be readjusted for
required operation.
Nominal Oil Pressure
w/Compressed Air Atomizer
N/A
N/A
90 psig (6.20 bar)
100 psig (6.90 bar)
90 psig (6.20 bar)
100 psig (6.90 bar)
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MS-9