Global Power Technologies
1120 - Class I, Division 2, Group D, T3
Both air shutters are to be adjusted equally in small increments. Wait 5 to 10 minutes for burner
to stabilize. Note the V
set
and record.
If V
set
increased or did not change, the burner is air rich. Continue decreasing the air holes until
a slight decrease is observed.
Note: You must wait the required time after each adjustment. When a decrease in V
set
has
occurred, increase the air hole size by rotating the air shutter back about 2.5mm.
This should ensure slightly air rich (optimum) settings.
If V
set
decreased you are presently fuel rich. Enlarge the air holes until V
set
peaks then increase
the air holes slightly more towards the air rich side (optimum settings).
After the unit has stabilized, read V
set
and compare with required V
set
Item 6.
If these values are not within ±0.1 volts, proceed to fuel pressure adjustment (paragraph 2.10).
If these values are within ±0.1 volts, the TEG is ready to switch to operate mode.
2 .10 Fuel Pressure Adjustment
To change V
set
it is necessary to change the fuel pressure. Figure 14 shows the change in V
set
as a function of the change in fuel pressure for a typical TEG operating at rated power. The
following examples will illustrate how this curve can be used.
1)
Suppose the measured V
set
is 6.5 volts, but 6.7 volts or a change of +0.2 volts is required.
2)
Locate the ±0.2 volts on the vertical axis and read horizontally until intersecting the
curve.
3)
Read vertically down to the horizontal axis and find the required change in fuel pressure.
4)
Which is 5.5 kPa (0.8 psi).
You must increase the fuel pressure by 5.5 kPa or 0.8 psi.
5)
Suppose the measured V
set
is 6.8 volts and that 6.5 volts or a change of -0.3 volts is
required.
6)
Locate -0.3 on the vertical axis and read horizontally until intersecting the curve.
7)
Read vertically down to the horizontal axis and find the required change in fuel pressure.
8)
Which is -8.3 kPa (-1.2 psi).
You must decrease the fuel pressure by 8.3 kPa or 1.2 psi.
2.10.1 Use the following procedures to make the adjustment in fuel pressure:
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