CleaverBrooks CBLE - Steam Controls (All Fuels)

750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
1-5
1.4 — Steam Controls (All Fuels)
FIGURE 1-2. Steam Boiler: Light Oil or Gas Fired
1.4 — Steam Controls (All Fuels)
1.4.1 — 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 preselected pressure setting.
1.4.2 — High Limit Pressure Control
Breaks a circuit to stop burner operation on a rise of pressure 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 nor-
mally equipped with a manual reset.