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Inspection and Maintenance

8-30

750-91 (revised 2009)

Model CB-LE Packaged Boiler Manual

When opening the heads, either for routine maintenance or for an annual inspection, do not do so when the boiler

or the door is hot. The refractory will hold its temperature for some time and exposure to ambient temperature or

rapid cooling may cause refractory cracking and/or harm to the boiler and head metal.

When opening the front head of a CB-LE, either remove the motor and fan cassette assembly and swing the

assembly away from the head. Or, with the motor and cassette in place, remove the motor-to-davit-arm connecting

bolt to allow swinging the motor and fan cassette with the head.

After confirming that the electrical power and fuel are locked in the off position, disconnect the fuel lines.

Disconnect the main gas line coupling, the pilot line and the sight port air line. If the boiler is oil fired, remove the

supply and return oil lines and the oil pilot line if necessary. Remove the head bolts and swing the head.

The opened head should be supported by blocking or jacking to eliminate possible deformation of the head or hinge

area.

8.21.1 — Front Head

Inspect the second to third pass baffle gasket. If it is brittle, cracked or broken, replace the gasket.

Inspect the second to third pass baffle for a good seal at the tube sheet and the vessel.

If necessary, scrape old cement away and clean out and wire brush the sealing area to assure an effective bond

between the high temperature cement and the steel. Be sure not to obstruct the tubes with excess cement.

Scrape the old gasket material off the vessel to front head sealing area and the dry oven to front head sealing area.

Using a wire brush clean off any excess gasket material or rust. Using Spray Tack spray the area to hold the gasket

in place prior to closing the front head. Use new fasteners when replacing the tadpole gasket.

Inspect the condition of the blanket insulation on the front head. Replace the insulation if loose or torn.

CleaverBrooks CBLE User Manual

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