PROHEAT M-SERIES SERVICE MANUAL
3-7
• Re-clamp the Fuel Nozzle stem lightly but firmly in a vise, take care
not to cause damage. Reinstall the distributor and Fuel Nozzle head.
Ensure that the distributor is seated correctly. The Fuel Nozzle
assembly is self-aligning.
f) Inspect the Fuel Nozzle cavity and clean as necessary using electrical
contact cleaner or brake cleaner.
g) Reinstall the Fuel Nozzle.
h) Reinstall the burner head by mounting it against the heat exchanger face,
turning clockwise to engage the mounting ears on the bolts.
i) Tighten mounting bolts.
j) Reconnect the electrical harnesses and fuel supply line.
k) Switch the PROHEAT on and operate for at least one complete cycle.
Observe the operation.
If a Start diagnostic code is indicated, proceed to Step 4.
Figure 3-4: Fuel Nozzle Assembly
FUEL NOZZLE ORIFICE
AIR PASSAGES
FUEL AND AIR
OUTLET ORIFICE
HEAD
DISTRIBUTOR
STEM
O RING
NOZZLE
NUMBER
ASSEMBLY TORQUE = 30 in-lbs
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