MAINTENANCE INSTRUCTIONS
RK 100 - RAD - ING - MAN.INST - 1311.1 - DIGITECH CS MIAH4
52
6. SERVICING THE APPLIANCE
6.1 General Warnings
All maintenance operations must be carried out by professionally qualified personnel, authorised by
Radiant Bruciatori Spa.
The frequency of boiler maintenance must comply with current law and, nevertheless, should be
carried out once a year.
In order to guarantee the long life of the appliance and in accordance with the current gas safety
regulations, only use original spare parts
Before carrying out any type of maintenance operation, disconnect the appliance from the mains
electricity supply and close the gas valve.
6.2 Boiler inspection
6.2.1 Main electricity supply
Fluctuations in mains voltage (230 V) of about +10 % -15 % do not bring functioning problems. The main electricity
production must be in compliance with the CEI relevant and current standards. The boiler must also be equipped of
a safety device able to ensure the mains voltage's multipolar disconnection with an opening distance of the
contacts of at least 3 mm.
6.2.2 Periodical checks
In order to ensure that the boiler operates efficiently and safely, it is recommended that the appliance is inspected
by a suitably competent technician at least once a year.
The following operations should be carried out annually:
■
Check the condition of the gas seals and replace where necessary;
■
Check the condition of the water seals and replace where necessary;
■
Visually inspect the condition of the combustion chamber and flame;
■
When required, check that the combustion is correctly regulated and if necessary proceed in line with section
“Commissioning the boiler”;
■
Remove and clean any oxidation from the burner;
■
Check that any water leaks and/or oxidation on connections is present;
■
Check that the seal of the room-sealed chamber is undamaged and positioned correctly;
■
Check the primary heat exchanger and clean if necessary;
■
Check the condition and operation of the ignition and gas safety systems. If necessary, remove and clean the
scaling from the ignition and flame detection electrodes, paying particular attention to replace them at the correct
distance from the burner;
■
Check the heating safety systems: temperature limit safety thermostat, pressure limit safety device;
■
Check the safety valve/s on the heating circuit
■
Check the pre-fill pressure of the expansion vessel (see expansion vessel data plate);
■
Check and if necessary re-set the correct pressure value of the system;
■
Check the correct circulation inside the boiler through filtering devices;
■
Check that the boiler is sloped of 3°/4° toward the back side. Check that the condensate drain system, including
outside the boiler (flue system condensate collection devices), allows the condensate to flow freely to the
collection devices. If the condensate is discharged to the domestic drainage system, install an inspection trap in
the condensate system prior to it entering the drainage system to interrupt the continuity between the two
systems;
