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g. The low/high LP pressure switch is factory set at a low set point of 165 psig (1140 kPa)
and a high set point of 230 psig (15.9 bar). The low pressure switch setting should be
approximately 15 psig (1.03 bar) below the back pressure regulator setting.
h. Check with your LP supplier for the exact maximum expected tank pressure for your fuel.
8. The burner LP flow control (metering) valve is preset based on flow required from low to
high fire. The low fire LP setting can be changed by loosening the coupling connecting the
LP valve to the control motor, adjusting the LP valve pointer, and re-tightening the coupling.
The high fire LP flow can be changed via the burner control system, or if necessary , by
increasing or decreasing LP pressure. See the individual burner performance sheets for LP
fuel flow data and settings. If the burner LP fuel control valve continually freezes at low fire,
increases LP flow slightly until freezing stops. If the burner LP nozzle continually freezes it
usually indicates that water is in the fuel. Contact your LP fuel supplier about the addition of
methanol to your LP fuel tank.
Any adjustment to the LP fuel 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.
9. Different size nozzle holes are required on propane, butane, or mixtures of both to assure
optimum vaporization and combustion. If using a butane or propane / butane mixture, be
sure to specify the fuel when ordering and consult Eclipse for specific nozzle hole sizes.
TM
10. The MegaStar
utilizes a multi-port LP nozzle assembly positioned around the primary air
tube. Atomizing air supplied from an auxiliary blower assists in mixing and vaporizing the
propane. The nozzle assembly incorporates a series of holes and nozzles to control the LP
flow. Check for plugged nozzle holes by removing the nozzle from the burner and running
water through it to make sure all the holes are clear. Clean any blocked holes and return
the nozzle to its original position.
Max. Tank Temp.
(°F)
(°C)
70
21
80
27
90
32
100
38
Table 13. Recommended Burner Supply Fuel Pressures
CAUTION
NOTE
LP fuel flow settings per the individual burner
performance sheets are for initial set-up only.
Final settings may have to be readjusted for
required operation.
100% Propane
(psig)
(bar)
175
12.10
190
13.10
215
14.80
230
15.90
50% Propane
50% Butane
(psig)
(bar)
125
860
140
965
160
1,100
170
1,170
Page 30
MS-9
100% Butane
(psig)
(bar)
75
520
80
550
85
585
95
655
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