Inspection and Maintenance
8-4
750-368
CBEX Elite 100-1200 HP
8.3.1 — Steam Boiler
Always be sure of the boiler water level. On steam boilers, the water column should be
blown down daily. Check samples of boiler water and condensate in accordance with
procedures recommended by your local Cleaver-Brooks authorized representative.
Refer to Chapter 3 for blowdown instructions.
No attempt should be made to alter the point of low-water cutoff or point of pump cut-
in or cut-out. If a low-water device should become erratic in operation, or if its setting
changes from previously established levels, contact your local Cleaver-Brooks autho-
rized representative.
FIGURE 8-2. Low Water Cutoff
The instructions on the low water cutoff plate on a steam boiler should be followed in accordance with a definite
schedule.The controls normally function for long periods of time, which may lead to laxity in testing on the
assumption that normal operation will continue indefinitely.
FIGURE 8-3. Low Water Cutoff Plate
On a steam boiler, the head mechanism of the low-water cutoff device(s) should be removed from the bowl at
least semi-annually to check and clean the float ball, the internal moving parts, and the bowl or water column.
Remove the pipe plugs from the tees or crosses and make certain the cross-connecting piping is clean and free of
obstructions. Controls must be mounted in a plumb position for proper performance. Determine that piping is
vertically aligned after shipment and installation and throughout life of equipment.
A blowdown of the water controls on a steam boiler should be performed daily. Open the drain valve slowly to
prevent float damage.
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