CleaverBrooks CBLE, Operation And Maintenance Manual

Page: 145 / 194

750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual 8-25
8.20 — Refractory
There should be approximately 7/8” space between the two shafts. Place the coupling insert between the coupling
halves prior to reassembly. Check that both shafts rotate freely.
Refer to the previous section on coupling alignment instructions.
If shims were used originally under either pump brackets or motor feet, be sure that they are correctly reinstalled.
When reinstalling the fan, slide the hub on the pump shaft so that it is bottomed. Tighten the setscrew and cap
screws. If the fan blades were removed from the hub, be sure that the side of the blade marked “Blower” faces the
hub when reassembling. When tightening the coupling halves or the fan hub, tighten the setscrews against the key
first, then tighten the setscrew against the shaft. Clean or remove any dust or grime from the blades prior to rein-
stalling.
When replacing the retainer screen, a slight force may be required to push the cooling coil into the air cylinder so
that the pins may be fitted into place.
Be sure that all piping connections are tight.
If the motor was replaced or if motor leads were disconnected, be sure that pump rotation is proper before starting
operation. The air pump should rotate in a clockwise direction, as viewed from the drive shaft end.
8.20 — Refractory
The boiler is shipped with completely installed refractory. The refractory consists of the rear head, the inner door,
and the furnace liner. Normal maintenance requires little time and expense, and prolongs the operating life of the
refractory.
Preventive maintenance through periodic inspection will keep the operator informed of the condition of the refrac-
tory, and will guard against unexpected and unwanted downtime and major repairs.
Frequent wash coating of the refractory surfaces is recommended. High-temperature bonding, air-dry type mortar,
diluted with water to the consistency of light cream, is used for wash coating. Re-coating intervals will vary with
operating loads and are best determined by the operator when the boiler is opened for inspection.
NOTE: Keep the motor and other components free from dust and dirt to prevent overheating and damage. Motor
lubrication should follow manufacturer’s recommendations.