Rendimax N EL
27
The burner assembly burns poorly: Flames too high, too low or too yellow
Dirty gas valve filter.
Check the pressure of the gas supply.
Dirty gas nozzles.
Check that the boiler is not dirty.
Check that the ventilation in the room where the appliance is installed is sufficient for correct combustion.
Smell of unburned gas
Check that the boiler is perfectly clean.
Check that there is sufficient draught.
Check that gas consumption is not excessive.
The boiler works but the temperature does not increase
Check the regulation thermostat for correct operation.
Check that the gas consumption is not less than the required consumption.
Check that the boiler is perfectly clean.
Check that the boiler is properly rated for the heating system.
Check that the heating system pump is not blocked.
Temperature of the water supplied to the heating system is too high or too low
Check the operation of the regulation thermostat.
Check that the pump is not blocked.
Check that the circulating pump is adequately rated for the system.
Explosions in the burner assembly. Delays in ignition
Check that the pressure of the gas is correct and that the boiler body is not dirty.
The regulation thermostat starts the boiler with a too-great temperature difference
Check that the bulb is properly inserted in the sheath.
Check the operation of the thermostat.
The boiler produces condensation
Check that the boiler is not working at too-low temperatures (below 50°c).
Check that the gas consumption is correct.
Check the effectiveness of the flue.
The boiler shuts down for no apparent reason
Activation of the flue gas thermostat.
Activation of the safety thermostat (with automatic reset), due to overtemperature.
N.B.
Before calling the customer service department, to avoid unnecessary expense, check that boiler shut downs
are not due to interruptions to the gas or electrical power supply.
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