CleaverBrooks CBLE, Operation And Maintenance Manual

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750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual 8-31
8.21 — Head Inspection and Maintenance
Examine the condition of the burner housing and ensure that all necessary burner setup is correct. Be sure the oil
piping and atomizing air piping are in good condition and not leaking, replace if necessary. Clean the cooling fins on
both the oil and atomizing air cooling tubes.
Using high temperature cement, fillet the corner of the dry oven to burner housing contact area. Do not apply the
cement more than 1/2 inch out from the corner. Applying too much cement in this area could block the annulus
burner outlets.
Swing the front head in place. A long punch or prybar might be necessary to align the bolt holes. Insert bolts hand
tighten. After all bolts are threaded, continue tightening in a star pattern.
After all bolts are threaded, continue tightening in a star pattern.
After all bolts are secured, tighten the upper and lower hinge nuts evenly to pull the door securely against the vessel.
Repeat the star tightening sequence on the head bolts, to verify gasket sealing.
Do not overtighten. Tighten alternate bolts until the door is secured and gas tight. After the boiler is back in
operation, retighten the bolts to compensate for any expansion.
8.21.2 — Rear Door
The rear door is a steel shell containing a horizontal baffle and lined with insulation material and castable refractory.
Burned or discolored paint on the outer surface of the door does not necessarily indicate refractory trouble, but may
be an indication of other conditions, such as:
1. Leaking gaskets.
2. Improper seal.
3. Door retaining bolts insufficiently or unevenly tightened.
4. The air line to the rear sight tube may be blocked or loose.
5. Door was repainted with other than heat resistant paint.
Figure 8-15 Front Head, CB-LE
Gasket - dry oven
to front head
Gasket - front head
to tube sheet
Front head
Baffle, 2nd-3rd pass