Burnham MEGASTEAM MST288 - Manual (Page 44)

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5. Adjust oil pressure.
a. When checking a fuel unit's operating pressure, a
reliable pressure gauge may be installed in either
the bleeder port or the nozzle port. See Figure
23.
b. Locate oil pressure adjusting screw and turn
screw to obtain proper pump pressure, refer to
Table 8 at rear of manual.
c. To check the cut-off pressure, deadhead a reliable
pressure gauge onto the copper connector tube
attached to the nozzle port. Run the burner for
a short period of time. Shut the burner off. The
pressure should drop and hold.
d. Remove the gauge and install bleeder port and/or
reconnect the nozzle port line.
G. ADJUST OIL BURNER wHILE
OPERATING. (flame present)
1. ADJUST DRAFT REGULATOR for a draft of
zero inches (water gauge) in the canopy (see Figure
15) after chimney has reached operating temperature
and while burner is running. (At least five minutes)
See Table 8 at rear of manual for details.
2. READJUST THE AIR BAND on burner for a
light orange colored flame while the draft in the
canopy is zero inches water column ("w.c.). Use a
smoke tester and adjust air for minimum smoke (not
to exceed #1) with a minimum of excess air. Make
final check using suitable instrumentation to obtain
a CO
2
of 11.5 to 12.5% with draft of zero inches
water column ("w.c.) (water gauge) in canopy.
These settings will assure a safe and efficient
operating condition. If the flame appears stringy
instead of a solid fire, try another nozzle of the same
type. Flame should be solid and compact. After
all adjustments are made recheck for a draft of zero
inches water column ("w.c.) in the canopy. Replace
plug at completion.
See Table 8 (at rear of this manual) for details
regarding the overfire pressure when baffles are both
installed and removed.
3. READJUST THE HEAD SETTING only if
necessary.
a. MST288 & MST396:
Beckett MB(L1) Head burner has a fixed head
which is non-adjustable.
b. MST513 & MST629:
Beckett MD(V1) (variable) Head burners have
the ability to control air by moving the head. It
might be necessary to move the head forward
or back one position at a time to optimize the
smoke and CO
2
readings. See Figure 24.
4. READJUST THE TURBULATOR SETTING only
if necessary. (Riello Burner only)
a. Move the turbulator setting forward or back one
position at a time to optimize the smoke and CO
2
readings.
5. TURN “OFF” BURNER and remove pressure
gauge. Install gauge port/bleeder plug and tighten.
Start burner again.
WARNING
Do not loosen or remove any oil line fittings while
burner is operating.
6. FLAME FAILURE
The MegaSteam™ boiler controls operate the burner
automatically. If for unknown reasons the burner
ceases to fire and the reset button on the primary
control has tripped, the burner has experienced
ignition failure.
WARNING
Do not attempt to start the burner when excess oil
has accumulated, when the unit is full of vapor, or
when the combustion chamber is very hot.
H. CHECk FOR CLEAN CUT OFF OF
BURNER.
1. AIR IN THE OIL LINE between fuel unit and
nozzle will compress when burner is on and will
expand when burner stops, causing oil to squirt from
nozzle at low pressure as the burner slows down and
causing nozzle to drip after burner stops. Usually,
cycling the burner operation about 5 to 10 times will
eliminate air from the oil line.
2. IF NOZZLE CONTINUES TO DRIP, repeat
Paragraph H, No. 1. If this does not stop the
dripping, remove cut-off valve and seat, and wipe
both with a clean cloth until clean, then replace
and readjust oil pressure. If dripping or after burn
persist replace fuel pump.
Figure 3: Adjusting Fuel Pump Pressure