4. MAINTENANCE
4.1. The repairs or maintenance operations must only be carried out by qualified
personnel.
4.2. The unit must be checked by a qualified technician at least once a year.
4.3. Regularly check the conditions of gas hose, and gas regulator if it must be
replaced only use original spare parts.
4.4. Before starting any maintenance operation on the heater disconnect from both
gas and electrical suppliers.
4.5. If the unit has not been used for a long period we advise that a technician carries
out a general check up before using. It is important to control the following:
4.5.1. Periodically check the gas supply hose conditions and, should it be changed,
use only original spare parts.
4.5.2. Check the starting electrode position (see Fig.5).
4.5.3. Check the connections of the safety thermostat and of the thermocouple: they
must always be clean.
If necessary clean the fan blade and the inside of the heater using compressed air.
