INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Easco Boiler Corp 1175 Leggett Ave Bronx, NY 1047 T: 718.378.3000 F: 718.378.4560 [email protected] easco.com
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is noted, broken ligaments are probably the reason.
n) Pipe Connections and Fittings – All piping should be examined for leaks. If any are
found, it should be determined whether they are the result of excess strains, due to
expansion or contraction, or other causes. The general arrangement of the piping in
regard to the provisions for expansion and drainage, as well as adequate support at
the proper points, should be carefully noted. The arrangement of connections between
individual Boilers and the supply and return headers should be especially noted to see
that any change of position of the Boiler due to settling or other causes has not placed
an undue strain on the piping. It should be ascertained whether all pipe connections
to the Boiler possess the proper strength in their fastenings, whether tapped into or
welded to the boiler shell. The inspector should determine whether there is proper
provision for the expansion and contraction of such piping and that there is no undue
vibration tending to damage the parts subjected to it. This includes all water pipes.
Special attention should be given to the blow-off pipes with their connections and
fittings because the expansion and contraction, due to rapid changes in temperature
and water-hammer action, bring a great strain upon the entire blow-off system.
The freedom of the blow-off and drain connection on each Boiler should be tested,
whenever possible, by opening the valve for a few seconds, at which time it can be
determined whether there is excessive vibration.
o) Low Water Cut-Off – All automatically fired Boilers are required to be equipped with
an automatic low water fuel cutoff so located as to automatically cut off the fuel supply
when the surface of the water falls below the lowest safe waterline. Such a fuel control
device may be attached directly to the boiler shell or to the tapped openings provided or
attaching a water glass direct to a Boiler.
p) Localization of heat – localization of heat brought about by improper or defective
burner or stoker installation or operation, creating a blowpipe effect upon the Boiler,
should be cause for shutdown of the Boiler until this condition is corrected.
q) Suspended Boilers – Freedom of Expansion – Where Boilers are suspended (i.e.
high firebox). The supports and settings should be examined carefully, especially at
points where the boiler structure comes near the setting walls or floor to make sure that
ash and soot will not bind the boiler structure owing to the expansion of the parts under
operating conditions.
r) Safety Valve/Safety Relief Valves – As these devices are the most important
safety devices on the Boiler, it should be inspected with utmost care. There should be
no accumulation of rust, scale or other foreign substances in the body of the valve,
which will interfere with its free operation. The valve should not leak under operating
conditions. The opening pressure and freedom of operation of the valve should be
tested by raising the pressure to the point of opening. It this cannot be done, the valve
should be tested by opening with the try lever. Where the valve has a discharge pipe,
the inspector should determine at the time the valve is opening whether or not to drain
opening in the discharge pipe is free and in accordance with the Code requirement. If the
inspector deems it necessary, in order to determine freedom of discharge from as safety
