Maintenance
5-10
750-382
CBT
5.7 — Waterside inspection/cleaning
Waterside inspection frequency may depend upon the local jurisdiction and
inspector but it is recommended that a waterside inspection take place 2-3
months after initial startup.
C-B further recommends to semiannually remove all handhole covers and
thoroughly clean the water side cavity and bottom of the boiler.
To inspect the boiler on the waterside, first shut off the electric power to the
burner. Close all waterside stop and shutoff valves, including the steam stop valve
or valves. Close the manual gas shutoff valve. After allowing the boiler to cool,
open the bottom blowdown valve, crack the manual bleed valve (Figure 5-9), and
drain the boiler. While the boiler is draining, note the condition of the water.
When the water has drained from the boiler, remove the handhole covers and
examine the waterside surfaces. Use a good flashlight and, where necessary, a
swivel mirror with an extension. Discuss any scale, sludge or other buildup on the surfaces with the water
treatment company or technician.
On the water column piping, remove the plugs, remove all probes, and inspect. Clean as necessary, being sure
to remove any debris or blockages.
If a waterside sludge buildup is noticed, flush the waterside and drain. Again, consult with the water treatment
company or technician on cleaning. After inspection, install new gaskets, close the handholes, replace probes,
tighten plugs, and allow water to fill the boiler while keeping the bleed valve open. Close valve before placing
boiler back into operation.
FIGURE 5-9. Manual bleed valve
FIGURE 5-10. Inspection port (handhole) locations
Important
!
Clean probes are essential to proper boiler operation. Always
ensure that probes remain free of debris and buildup.
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