35
MAINTENANCE
5
5.1 - GENERAL RULES
Before effecting any operation of cleaning or
maintenance, disconnect the boiler from the
electrical supply acting on the main switch
onto the panel board.
In case of failure or bad operation of the boiler,
switch it off, abstaining your self from any
attempt of reparation or direct intervention.
Exclusively address to professionally qualified
personnel.
The possible reparation of the boiler must be
effected by an authorized service center
using only original spare parts.
The non respect of the above can jeopardize
the safety of the boiler.
To guarantee the efficiency of the boiler and
for its correct operation it is essential to submit
the boiler to an annual maintenance, through
a professionally qualified technician, according
to the indications of the manufacturer.
When it is decided not to use the boiler
anymore, the parts which can be potential
sources of danger shall be made harmless.
After a month of boiler operation, open the
front door and ascertain the smoke pipes are
clean.
In case of a heavy dirtiness:
-
Remove the turbulators from smoke pipes.
-
Clean all the smoke pipes using the brush
delivered with the boiler.
-
Open the two cleaning doors on the sides
of the smoke chamber and remove, with
a vacuum cleaner all the soot.
-
Relocate the two cleaning doors and the
turbulators; then close the boiler front door
and check for soundness all around the
sealing rope.
- Then adjust the burner.
Note: With a burner properly adjusted only a
cleanup at the season end is necessary.
5.2 - ORDINARY
MAINTENANCE
The boiler operating condition are very different
from one case to the other and depend on
the fuel used, on the adjustment of the burner,
on the number of starting, on the C.H. system
characteristics, etc. and for that reason it is
not possible to establish, in advance, the
frequency of the maintenances.
It is, then, necessary that the technician, who
performs the first cleaning, esthablish the
cleaning frequency on the base of the boiler
status.
Generally, we suggest the following frequency,
according to the fuel used:
- Gas fired boilers: once a year.
-
Oil fired boilers: twice a year or more often
if there is reason to doubte of their
adjustment.
In any case the local rules in force have to
complied with.
We suggest to shake the turbulators, without
removing them from the smoke tubes, at least
once an month of operation, not to allow the
soot blocking them and making them extremely
difficult to be removed.
During the operations of ordinary maintenance
it will be necessary to brush the tube bundle
- after the removal of the turbulators - and
the furnace and collect the soots through the
cleaning doors on the smoke chamber.
Besides it will be necessary to verify the good
operation of the protection and control
devices (thermostats, thermometers) of the
boiler and of the plant (manometers, flow
and pressure switches, expansion vessels)
and all the safety devices.
In this occasion it will be necessary to notice
the quantity of reinstatement water used and
decide, also in base to its hardness, an
intervention of preventive descaling.
It must be considered that the calcium and
magnesium salts dissolved in the raw water,
with repeated reinstatements, can cause
deposits in the boiler that hinder the inner
circulation and subsequent overheating of
the wall plates with possible serious damages
that cannot be attributed to the constructive
geometry and/or to the materials used and
to the constructive technique and, therefore,
they are not covered by guarantee.
On the occasion of the ordinary maintenance
it is useful to perform a small discharge from
the boiler to verify if sludges escape.
In affirmative case, it will be necessary to
prolong the discharge up to get clear water.
At the end of the drainage it will be necessary
to reestablish the level of the water in the
system.
At the end of the smoke circuit cleaning, to
the next restart check around the burner plate
and the smoke chamber for smoke leaks. In
the case some smoke leaks were noticed,
first of all tighten the nuts fitting the smoke
chamber and, not getting result, it will be
necessary to replace the sealing gasket.
Similarly it will be necessary to act on the
front door, increasing at first the tightening
of the nuts (after having loosened the inner
counternuts) and then, if necessary, by
replacing the whole gasket.
If it was necessary to center the sealing
gaskets on the sealing ring of the door it is
possible to adjust the door position by acting
as suggested on the paragraph 2.6.
At the end check and, if necessary, restore
the sealing of the connection of the chimney
and of the burner with the door.
The performed operations must be recorded
on the log book of C.H. system.
5.3 - EXTRAORDINARY
MAINTENANCE
Extraordinary maintenance of end season
or for long periods of inactivity.
It will be necessary to perform all the operations
described in the preceding chapter and
besides:
-
Check the state of consumption of the
turbulators to replace them in time.
-
To facilitate the extraction of the turbulators,
with the TRIOPREX-N boilers a special
extractor is supplied.
-
After the cleaning of the smoke circuit it
is convenient to pass in the smoke pipes
and in the furnace with a rag soaked of
diluted solution of caustic soda.
After having let to dry cross again all the
surfaces with a rag soaked of oil.
Perfectly close the the burner air intake
to avoid a continuous passage of damp air
through the boiler recalled by the chimney
it self.
It is advisable to put inside the furnace
some alive mortar that has an hygroscopic
action.
-
Do not empty the C.H. system and the
boiler.
-
Protect the screws with graphitized fat,
nuts and pivots of the door.
-
Show all the operations that must be
perform to the following put into operation
particularly the operation of the shunt
pump must be checked.
