Lanair MX300 - Manual (Page 32)

Section 11 - Burner Start-Up Procedure
28
15. When using the by-pass regulator adjust the fuel pressure gauge on the left side of the
burner to read.
NOTE:
NOTE: When using the metering pump the fuel flow is determined by the pump. Pressures
may not be the same as shown above.
Adjust the thumb screw on the fuel bypass regulator clockwise to increase pressure,
and counter clockwise to decrease pressure to the burner. The oil pressures listed above are a
starting point, you may need to adjust from there when VISUALLY SETTING THE FLAME
(See page 29-31, flame adjustment).
16. Adjust the barometric damper to obtain a draft of -.06 W.C. while the heater is hot and
operating.
NOTE: It is VERY IMPORTANT that the barometric damper is set to the required settings to
ensure the natural draft of exhaust gases (see section 4).
17. Depending on the type of fuel used, the elevation, temperature, and oil viscosity, the
combustion air baffle will need to be adjusted for optimum performance (See page 29-
31, flame adjustment).
18. When the room thermostat setting is met
the burner will shut off, but the fan will con-
tinue to operate until the cabinet tempera-
ture drops to 90º F.
The combustion air baffle is NOT factory set
!
Clockwise:
Increase fuel
pressure
Counter
Clockwise:
Decrease fuel
pressure
Fuel By-Pass Regulator
Not used with the optional Metering Pump
Thumb Screw
QUESTIONS?... Contact Customer Service at 1-888-370-6531 M-F 8:00 am- 4:15 pm CST
No. 1 & No. 2 Fuel Oil Approved Waste Oil
Model MX-250 2.25 (2-1/4) - 2.5 (2-1/2)LBS. 2.5 (2-1/2) - 2.75 (2-3/4) LBS.
Model MX-300 3 - 3.25 (3-1/4) LBS. 3.5 (3-1/2) - 3.75 (3-3/4) LBS.