Lanair MXB360 - Manual (Page 29)

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Section 17 - Flame Adjustment
Flame Adjustment
1. Start boiler, let it run for at least 45 minutes to reach operating temperature before proceeding.
2. Check chimney draft, set the barometric damper to -.06 WC when hot and running.
3. Check the atomizing air pressure, set the air filter/regulator on the heater to 15 PSI as a starting point.
4. Check the fuel pressure gauge on the burner, set to: 7 LBS.
Adjust the screw on the fuel regulator. Lock into position. The flame should extend no more than 3/4 of the way into
the chamber.
NOTE: The above pressure is a starting point, depending on your installation you may need further adjustment.
5. Loosen the combustion air adjustment baffle, slowly close the baffle in 1/16” increments until the heater (flame)
starts to rumble. Then slowly open the baffle in 1/16” increments until the rumbling stops, (wait 2 minutes between
adjustments) finally open the baffle an additional 1/8” to provide excess oxygen. Secure the baffle, (See Fig 19).
NOTE: Mechanical equipment like gauges and regulators are not always 100 percent accurate,
6. Drill a hole in the smoke outlet transition piece and the damper and run combustion tests using combustion testing
equipment.
7. Adjust flame to achieve the following
readings:
CO2; 12-15%
Smoke; 1-2 on the Bacharach
Scale Oil Burner Smoke Scale with
a maximum of 4.
8. Adjust the damper to have negative -.06
W.C. pressure (after 45 min. of operation) at
the smoke outlet. Secure damper.
9. Seal combustion sample hole and smoke
outlet connections using a high
temperature silicone sealant. Also seal all
breeching smoke pipe joints, seams and
connections to the chimney.
10.After burner has been adjusted and while
it is operating, check the front door for
leakage of flue gas. Should leakage occur,
tighten the door closure bolts. Also adjust
door hinge bolts.
Figure 19
combustion air
baffle The combustion air baffle is NOT factory set
!