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Operation and Maintenance Manual 103
10
Insert the lower burner tube into the center of the quartz tube and finger
tighten the heater swivel nut onto the tapered union fitting, then tighten an
additional 1/4 turn making sure not to break the quartz tube.
11 To begin the final tightening, use a 7/16" wrench and 5/16" wrench to
tighten the 1/4" Burner adapter one-quarter turn past finger-tight.
12 Using a 5/8" wrench on the heater swivel nut and a 1/2" wrench on one of
the flats of the tapered union fitting, tighten the heater swivel nut
one-quarter turn past finger-tight. Using a 5/16" wrench on the ¼" Burner
adapter, rotate this fitting so that the brazed H
2
line is aligned 180º
(opposite) from the oxidizer Inlet port.
13 Making sure that the Burner inlet fitting does not loosen, use a 1/2" wrench
on a flat of the tapered union fitting and 9/16" wrench on the 1/4" Swagelok
nut of the Burner adapter to tighten the tapered union fitting one-quarter
turn past finger-tight.
14 Rotate the quartz heater assembly so that the thermocouple and heater
leads are in the same plane and pointed in the same direction as the peg on
the Burner inlet fitting. Turn the splitter fitting so that H
2
inlet port is also
aligned with the peg on the Burner inlet fitting.
Figure 44 Large Quartz Tube Properly Inserted into the Quartz Heater Assembly