750-392
CBEX-DE
4-7
Control Settings: Steam and Hot Water
In the event the boiler is equipped with optional control devices not listed here, be certain to ascertain that their
settings are correct. If additional information is required, see your local Cleaver-Brooks authorized representative
or contact Cleaver-Brooks.
On initial startup or whenever the boiler is placed into operation from a “cold” start, the manual-automatic selec-
tor should be set at “manual”. After the boiler is in operation and thoroughly warmed, the selector switch should
be turned to “automatic,” so that the burner firing rate may be controlled automatically in accordance with load
demands.
4.4 — Control Settings: Steam and Hot Water
The operating and high limit controls should be set as described previously in Chapter 3.
4.5 — Gas Pilot
The gas pilot should be checked for satisfactory performance prior to initial firing. Follow the pilot flame adjust-
ment instructions provided in Chapter 3.
On initial starting attempts, several efforts might be required to fully bleed the pilot line. While checking pilot
adjustment, observe whether the pilot flame is extinguished promptly when the burner switch is opened. A lin-
gering flame indicates a leaking gas pilot valve, which is a condition requiring correction before proceeding.
4.6 — Atomizing Air
The supply and pressure of the atomizing air on an oil-fired burner should be checked. Before starting, inspect
the oil pump lube oil level. Add oil if necessary to bring the level to the mid-point or slightly higher in the sight
glass. Use SAE 20 detergent oil or ISO-68 hydraulic fluid.
The pressure vessel support legs are welded to mounting skids in front and secured by bolts at the rear of the pres-
sure vessel. The bolts are tightened for shipment. When the boiler is installed, and prior to initial firing, the bolts
securing the rear legs to the skid must be loosened to allow for expansion and contraction caused by differences in
temperature between pressure vessel and skids and to avoid damage to the equipment.
NOTE: The settings of the limit controls may require some readjustment after the boiler is started and running for a
short period. The scale settings on the controls are relatively accurate, but are principally for use as guides. Final
adjustment should be based on the reading of the steam pressure gauge or the water temperature thermometer.
!
Caution
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