Periodic Maintenance Operations; User Information; Yearly Inspection; Cleaning The Exchanger - Accorroni MEC25-85 Technical Information

8.10.2 MEC C series centrifugal fan
Disconnect the fan electrical connection from the
terminal strip on the printed circuit board of the air
heater electric panel. Unscrew the four screws
that attach the fan to the rear panel of the air
heater (on the side for models 25 - 30 - 35; at the
top and bottom for models 50 -57 -85). Extract the
unit and disassemble the fan protection grilles.
Clean the grilles and mount them on the new fan.
Insert, position and attach the new unit, re-
establish the electrical connection making sure to
respect the original connection as shown in the
diagrams and attaching the cables using suitable
clamps.

CLEANING THE EXCHANGER

9. PERIODIC MAINTENANCE OPERATION

9.1 USER INFORMATION

It is recommended to advise the user to carry out
the operations indicated in point 13.1 of this
manual at least once every two months.

9.2 YEARLY INSPECTION

9.2.1 Control and safety devices
WARNING! Specific technical skills are
required to test the control and safety devices
and this is why it is important to contact
skilled personnel.
Carefully carry out all the operations described in
chapter 5 and, in case of malfunctions, consult
chapter 7 regarding operating defects.
9.2.2 Cleaning the exchanger
Disassemble the top panel and the front panel
with the air delivery grille and remove any dust
deposits on the exchanger.
Clean the limit thermostat sensor, removing any
dust deposits.
If necessary, clean the rear of the exchanger, after
having disassembled the fan. Remove the dust
using a brush or a jet of compressed air.
Disassemble the cover at the top of the flue
exhaust header, use a circular movement to remove
the internal deflector and check that there are no
carbon deposits on the visible surface that may
obstruct the passage of combustion products. If
necessary, also remove the mixers from the
exchanger ducts and thoroughly clean all the
surfaces.
Check that the fitting duct between the header
and the flue exhaust fan has not deteriorated and
that there are no deposits inside. Check that the
pressure inlet tube of the flue pressure switch is
not obstructed.
Check the condition of the electric system and
check the efficiency of the connections.
Carefully replace the components and check that
they operate regularly (fig. 42).
Fig. 42
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