750-392
CBEX-DE
1-11
Component Locations
1.2.9 — Pressure Controls
1.Pressure Gauge: Indicates boiler internal pressure.
2.Operating Limit Pressure Control: Breaks a circuit to stop burner operation on a rise of
boiler pressure at a selected setting. It is adjusted to stop or start the burner at a prese-
lected pressure setting.
3.High Limit Pressure Control: Breaks a circuit to stop burner operation on a rise of pres-
sure above a selected setting. It is adjusted to stop the burner at a preselected pressure
above the operating limit control setting. The high limit pressure control is normally
equipped with a manual reset.
4.Pressure Transmitter: Senses changing boiler pressure and transmits a signal to the
boiler control system.
FIGURE 1-15. Steam Controls
FIGURE 1-14. Boiler Overview screen, Hawk 1000
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