PENSOTTI PCI 20-H, Instruction Manual

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MAINTENANCE INSTRUCTIONS
52
6.3 Boiler inspection
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.
■ 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.
If a relief valve discharges periodically, this may be due to thermal expansion in a closed water supply system.
Contact a qualified plumber to correct this situation. DO NOT PLUG THE RELIEF VALVE.
■ 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 maximum and minimum modulation pressures and the modulation itself.
■ 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 pre-fill pressure of the expansion tank (see expansion tank rating plate).
■ For safety reasons, periodically check the integrity and operation of the exhaust system.
■ Check that the connection to the mains electricity supply complies with that reported in the boiler’s instruction
manual.
■ Check the electrical connections inside the control panel.
■ Check the D.H.W flow rate and temperature.
■ Check that the condensate drain system is working correctly, including any parts of the system outside the boiler
such as condensate collection devices along the length of the exhaust vent and/or any acid neutralizing devices.
■ Check that the condensate flows freely and that there are no exhaust fumes present within the appliance.
Warranty will not be offered if recommended maintenance is not followed.