Fondital FORMENTERA KC 24, Инструкция по эксплуатации

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AST 14 C 257/00
PUMP POST-CIRCULATION FUNCTION
At the end of a heating, anti-freeze or chimney-sweep request, the burner (if ON) switches
off immediately. The pump continues to be powered for 30 sec (this time can be adjusted
via parameter P13). The same applies to the multifunction relay with P17=1 or P17=3 at
the end of each request by the remote control or the associated ambient thermostat.
At the end of a request for operation on plate DHW or tank heater mode, the pump
remains powered for a further 30 seconds, with the diverting valve switched to DHW
mode. In the absence of any request, if the water temperature read by the flow NTC probe
exceeds 78°C, the pump continues to be powered until the flow temperature falls below
this value. In this case the diverting valve switches to heating mode.
Any request for operation on CH, DHW, anti-freeze or chimney-sweep mode has priority,
and the post-circulation function will be forced to end immediately.
POST-VENTILATION FUNCTION
At the end of a request for operation, the burner (if ON) is switches off immediately and the
fan remains powered on for 10 seconds (post-ventilation timer).
Any request for operation on CH, DHW, anti-freeze, chimney-sweep mode will have
priority, and the ventilation function in progress will be forced to end immediately.
The post-ventilation function is also activated when the water temperature read by the flow
NTC probe exceeds 95°C. It ends when the temperature is below 90°C. The post-
ventilation function is performed at the ignition speed (parameter P6) + 900 rpm.
SAFETY DEVICES AND FUNCTIONS
3 bar safety valve
Mounted on the water pipe of the heating system, this valve controls the pressure, which
must not exceed 3 bar otherwise it causes problems inside the boiler.
If the valve reads a pressure value higher than the admitted one, it opens up and drains
water outside the system.
Pressure transducer (E04 and E09 shutdowns)
It monitors the system pressure. If the pressure is less than or equal to 0.4 bar
,
a low
pressure signal will be displayed with error code E04, and any pump operating request will
be ignored. The pump will switch off immediately. The multifunction relay, if selected as
P17=1 or 3, will be de-energised. During filling, the signal disappears when a value of 0.6
bar
is reached.
This transducer also checks that the system is not working at an excessively high
pressure. With a pressure higher than or equal to 2.2 bar, fault E09 is displayed (but
without interrupting any active functions). The error message disappears when the
pressure value falls below 2 bar.
IMPORTANT. The pressure threshold can be modified via the super-technical parameters.