Lanair MX300 - Manual (Page 33)

Section 12 - Flame Adjustment
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Flame Adjustment
1. Start the heater, let it run for at least 15 minutes to reach operating temperature before
proceeding.
2. Check the 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 18 PSI as a
starting point.
4. When using the by-pass regulator check the fuel pressure gauge on the burner, set to:
5.
NOTE: The above pressure is a staring point, depending on your installation you may
need further adjustment. Always VISUALLY SET THE FLAME. See page 30.
6. 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 baf-
fle, (See Fig. 10).
NOTE: Mechanical equipment like gauges
and regulators are not always 100 percent
accurate, VISUAL INSPECTION OF THE
FLAME IS REQUIRED in order to properly
dial in the flame settings, see page 30.
combustion
air baffle The combustion air baffle is NOT
factory set
!
Figure 10
When using the by-pass regulator adjust the thumb screw on the fuel by-pass regulator.
Lock into position. The flame should extend no more than 3/4 of the way into the
chamber. When using the optional metering pump the flow is determined by the
metering pump. Pressures may vary from those listed above.
Model MX-250 Model MX-300
No. 1 and No. 2 Fuel Oil 2.25 (2-1/4) - 2.5 (2-1/2)LBS. 3 - 3.25 (3-1/4)LBS.
Used Crankcase Oil 10W-50W 2.5 (2-1/2) - 2.75 (2-3/4)LBS. 3.5 (3-1/2) - 3.75 (3-3/4)LBS.