B2 Unless otherwise instructed, the water level should be carried near the center of the gauge glass. Any adjustment of the water level should be gradual. If the water level is too high, priming may occur, especially when the steam demand is large or d) rapidly fluctuating, and changing over the feed control to If priming occurs, blow down the boiler water manual operation, reduce the water level. But, the water level should be maintained as such that is just sufficient to take care of a drop in level that may occur in the subsequent change in steam demand. Reduce the steaming rate if necessary. Investigate the condition of the boiler water with regard to concentration of alkalinity and total solids, and examine the condition of the drum internals when the opportunity is afforded. e) While the boiler is being brought up to pressure, gradually heat and properly drain all cold steam piping. During the pressure raising operation, the drum water level often rises higher than the normal level due to the expansion of water. If it is desired to keep the water level visible in the level gauge at this time, boiler water should be blow down. g) observe the drum water level at times to confirm the proper functioning of the automatic feed water regulator.
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