Power-operated or manual dampers are provided
on some but not all boilers for superheater, economizer, and boiler outlet-gas
control. Damper blades, constructed of thin metal, are susceptible to oxidation
and warpage due to overheating and should be inspected for such damage.
Supporting brackets, driving rods, pins, and other devices should also be
examined.
The dampers should be operated and checked for
binding closure, and freedom from obstructions should be ensured. Damper
position should be confirmed with both control board and exterior indication
devices. Personnel, other than those working on damper operation, should not be
permitted in the damper section while the dampers are in operation.
No comments:
Post a Comment