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Experts in heating

User Manual

Twin Bio

- PLV 09.13

. Boiler operation and

aintenance

8. Boiler operation and maintenance

Use the main switch to deactivate the boiler and wait until
the boiler cools down – min. 1 hour before maintenance
(boiler cleaning).

8.A. Boiler operation guidelines

Normal daily boiler operation:
• check correct operation of system components: burner,

control system;

•   check water level on a pressure gauge;
•   check fuel level and quality and fuel feed system operation;
•   check hydraulic joints leak tightness;
•   keep the boiler room clean and tidy.

In case of any performance issues, remove the faulty devices
or contact an Authorised Service Centre to arrange a repair or
an adjustment.

8.B. Inspection scope and schedule:

a) Monthly

•   check system water pressure
•   check safety valve operation
•   check control and safety device operation
•   check tightness of all connectors and joints
•   check balanced ventilation system

b) Minor inspection (every 6 months)

•   check rope seal and gaskets,
•   check boiler door thermal insulation,
•   check safety devices (safety valve, safety temperature

limiter STB etc.),

• ﬂ ue gas analysis (if a sudden increase in ﬂ ue gas

temperature is identiﬁ ed, the combustion part of the boiler
must be cleaned)

c) Major inspection (every 12 months)

•   check rope seal and gaskets
•   check boiler door and cleanout cover thermal insulation
•   check safety devices (safety valve, safety temperature

limiter STB etc.)

•   analyse ﬂ ue gas
•   clean combustion section of the boiler
•   check thermal insulation of the boiler
•   check and adjust burner, adjust control system settings

After a long boiler/burner downtime, the residual oxygen
in boiler water and the oxygen from the air mixed with carbonic
acid have highly corrosive properties. Take any precautions
necessary after if the boiler downtime lasted over a week.

Periodically remove the soot, sludge and ash from
the combustion chamber, the ﬂ ue tubes and the grate. Clean
the boiler as necessary, but at least every 2 weeks. Remove
ash as required.

8.C. Maintenance

a) Boiler, burner, fuel feed system – mechanical

The regular and correct maintenance of the boiler is
a precondition of a correct and reliable operation and low fuel
consumption of the system. Contact an Authorised Service
Centre at least once a year and after every boiler downtime
to arrange an inspection.

Heating system maintenance procedure:
•   deactivate the boiler (system) (stop mode);
•   wait for a complete stop and allow to cool;
•   reduce the boiler temperature to the level allowing safe

maintenance;

• open boiler door;
• clean combustion chamber and all ﬂ ues and check the rope

seals in the boiler doors (replace if necessary);

• check and clean the burner (remove if necessary) – also,

clean the motor and fan (especially vanes) from the outside;

•   close the boiler door with burner;
•   remove the cover;
•   clean the combustion products from the rear section

of the boiler;

• check cover gasket quality (rope seals) and remove

as required;

•   close the rear boiler cleanout;
•   check smoke duct condition and gas tightness;
•   check installation and operation of the boiler sensors;
•   check installation and operation of the fuel feed system;
•   feeder gear motor;
•   fuel feed ducts leak tightness and ﬂ ow capacity.