Lanair MX300 - Manual (Page 41)

Section 13 - Service / Maintenance
Visit our website at: www.lanair.com
37
Maintenance - Oil Pre-Heater (cont.)
3. Clean Oil Pre-Heater Block
s Clean oil pre-heater block using a parts washer and brush. NOTE: Make sure all
passages are clean.
s Blow dry the oil pre-heater block. inspect ALL passages making sure they are clear and
clean.
4. Reassemble Oil Pre-Heater
s Re-install four 13/16" OD o-rings (4).
s Re-install cartridge heater. NOTE: Do not over-tighten.
s Re-attach face plate (2) using six hex cap screws (3).
s Apply loc-tite to three block plugs (12) and replace.
s Re-install hex cap screw (9) inside oil pre-heater block (5).
s Re-install o-ring (10).
5. Attach Air Pre-Heater Assembly
s Align the holes of the ignitor assembly and air pre-heater with those of the oil pre-
heater (see page 33).
s Attach air pre-heater assembly to the oil pre-heater block (5) using two hex cap screws.
Tighten securely.
6. Re-install Pre-Heater Assembly
s Place the air/oil pre-heater assembly into the burner body.
s Align the holes of the pre-heater assembly with those in the burner body.
s Secure the assembly to the body by re-installing the button hex screw (14) and washer
(11). NOTE:Do not tighten this screw at this time.
s Re-install oil gauge and oil fitting.
NOTE: Do not tighten these fittings at this time.
s Adjust the pre-heater assembly for proper setting. The end of the turbulator should b
recessed approximately 1/4” into the burner tube (see page 39 for turbulator
adjustment).
s Once adjusted tighten button hex screw (14) and fittings (6) securely.
7. Re-connect Electrical
s Re-connect all wires previously disconnected in the electrical junction box (refer to
wiring diagram, page 21 and the burner reference diagram, page 51).
8. Reconnect PSI Gauge, Fuel Line and Air Line
s Reconnect the PSI gauge (8) to the fitting (6) and tighten (Do Not Over Tighten)
s Reconnect the fuel line to the fitting (6) and tighten securely.
s Reconnect the air line by connecting the one end of the air line to the air solenoid and
the other end to the air fitting (see page 51).
9. Test Operation
s Follow start-up procedure, page 27.