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7.3.4 HEATER SAFETY
FLOW FAILURE
If the error E3 appears on the display, the boiler has detected a flow failure in the heating circuit.
The possible causes of this error are:
-
A blocked pump.
-
All the thermostat valves are closed and there is no circuit that permits the water return.
-
The circuit pressure is insufficient.
-
The heating circuit is blocked.
HEATER OVERHEATING
If the boiler detects an overheating in the heating circuit the
safety thermal limiter will operate. The boiler will be switched
off.
Once the cause of the overheating has been eliminated, the
thermal limiter must be re-armed.
Disconnect the boiler from the mains and remove the
two screws at the bottom of the boiler. Remove the
front panel.
Unscrew the right black cap and push the small pin
behind it until you hear a click.
The limiter will not re-arm until the temperature in the
heating header goes below 100°C or 80°C if the boiler is
adapted for radiant floor heating.
Replace the front panel following the steps in reverse
and connect the boiler to the mains.
HEATING SAFETY VALVE
A safety valve set at 3 kg/cm2 will activate if the pressure of
the heating circuit passes said value, expelling water. It is
essential that this valve runs to a drain
Location of the thermal limiter
HEATING in a CMXP boiler.
Содержание CMX15P
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