46
User instructions
for the user
Incidental not functioning
THE BURNER DOESN’T TURN ON
— If the room thermostat is installed, check that this is regulated with an higher temperature in
respect of that of the place where it is installed;
—
check that there is electrical supply and that the Summer/Winter Selector isn’t on 0 (stand-by)
but on SUMMER
or WINTER
. The GREEN lamp must be constantly ON (see details in
the paragraph “Working and warning indicators”);
—
if the Lock Out red lamp is on or flashing, see the paragraph “Working and warning indicators”;
—
check on the gauge that the boiler pressure is correct (1÷1.5 bar in a cold state) or at least not
lower than 0.5 bar.
— In SE Models, in some cases, eventual problems with the flue outlet impede the ignition of the
boiler without turning on the unblock red indicator. You have to check the ducts for the inlet and
the outlet, the relevant terminals and the device which controls the correct flue outlet. In the
installation process the prescriptions connected to the laws and the national and local rules
must be respected together with the rules contained in the paragraph “Chimney connections”.
SHORTAGE OF DOMESTIC HOT WATER PRODUCTION
— make sure that D.H.W. thermostat
is not set on a too low position;
— call a qualified technician to check gas valve regulation;
— let a technician check the storage temperature regulation, in the case it has been set to the
minimum because of an inactivity period, using the “room antifreeze” procedure (see “Boiler
inactivity” and “Hydraulic section”);
— call a qualified technician to check, and eventually clean, the hot water tank.
Remark: where the water hardness value is too high, it is suggested the installation of a
softening device, in order to prevent the limestone precipitation; this operation avoids a fre-
quent cleaning of the coil.
Do not try to repair the gas boiler by yourself.
For any intervention on the electrical, hydraulic or gas circuit exclusively call a qualified
technician.
The gas boilers must be fitted with original accessories only.
HERMANN Ltd. is not responsible for damages caused by the incorrect, wrong or unreason-
able use of non-original materials.
