Ariston MicroCombi 23 MFFI Installation Instructions Manual page 19

3.9 D
RAINING THE
6 - E
S D
RAINING THE
YSTEM
The heating system must be emptied as follows:
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D
RAINING THE
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- the gas is turned on.
D A
XHAUST ISCHARGE NOMALY
The boiler is fitted with safety devices, which in the event of defective
discharge of exhaust fumes, automatically interrupts the gas supply,
thereby shutting off the boiler.
The shutdown of the boiler is temporary and is indicated by the
illumination of the yellow L.E.D. "H" for a period of about 15 minutes.
Once this time period has passed and the discharge state of exhaust
fumes has returned to normal, the boiler automatically turns back on.
H S
EATING YSTEM
Turn off the boiler;
Attach a hose pipe and open the drain valve;
Empty the system at the lowest points (where present). When the heating
system is unused for an extended period of time, it is recommended that you
add antifreeze with an ethylene glycol base to the water in the heating pipe
work and radiators if the ambient temperature drops below 0°C during the
winter.
This makes repeated draining of the entire system unnecessary.
D H W
OMESTIC OT
Whenever there is the danger of the temperature dropping below the
freezing point, the domestic hot water system must be drained as follows:
Turn off the general water valve for the household plumbing system;
Turn on all the hot and cold water taps;
Empty the remaining water from the lowest points in the system (where
present).
19
S :
HUTDOWN
S
ATER YSTEM