63
If the boiler is not used for an extended period, the fol-
lowing operations must be performed:
- Move the main system switch and the main boiler
switch (1) to "off" and check that the green indicator
lights (2) and (3) are off.
- Close the fuel and water valves on the central heating
system.
b In this case, the frost protection system is deac-
tivated. Empty the central heating and DHW
system if there is the risk of freezing.
Temporary Shutdown
Shutting Down for Extended Periods
In the event of temporary absence over the weekend,
brief trips, etc. proceed as follows:
- Set the room thermostats to around 10°C
- Set parameter 2 to "10" or alternatively set the storage
heater thermostat to 10°C
By leaving the power supply on, as signalled by the
green LED flashing, and the fuel supply open the boiler
is protected.
The electronic controller has a frost protection function
that is also active in standby
The frost protection function has two levels:
- the first starts the pump
if the manifold temperature ≥ 5°C, or alternatively, when
CH_type=1 and the outside probe is connected; if the
out. temp ≤ 3°C (Par. 35=Frost_protection) the system
pump and the pump in the high temperature circuit are
started.
- the second starts the pump and the burner
if after 10 minutes the temperature in the manifold ≤
5°C, a burner is started at maximum output until the
temperature in the manifold ≥ 20°C;
if after 10 minutes the temperature in the manifold ≥
5°C, while if CH_Type = 1 and the outside probe is con-
nected, and the outside temperature ≤ 3°C, the pump
continues operating until the outside temperature ≥
3°C.
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