Rizzoli ST Série Manuel D'utilisation page 72

ST 90
6 4 1
Picture 18 - On ST model the boiler corresponds always with the combustion chamber. In this picture you can see the
model with combustion chamber on the left and flue outlet on the right (front sight). The model with flue
outlet on the left is symmetrical.
1) Connection detector of auxiliary thermostat (optional) Ø 1/2'' female
2) Going connection Ø 1''1/4 female
3) Connection for thermal discharge detector (optional) Ø 1/2'' female
4) Connections for thermal discharge circuit (optional) Ø 1/2'' male
5) Return connection Ø 1''1/4 female
6) Connection discharge Ø 1/2 female
7) Secondary air entrance (do not close it)
3.5 SAFETY
On every solid combustible based boilers it
is not technically possible to break the com-
bustion immediately as happens for boilers
based on liquid or gas combustible accord-
ing to necessity. For this reason, it is impor-
tant to swallow always the produced heat-
ing also even if the heating system does not
request that and also in case of lack of AC
power. On contrary, the water in the boiler
could boil without possibility of outlet, with
3.6 THERMAL DISCHARGE
For more safety, it is possible to make an
auxiliary circuit of thermal discharge con-
nected directly to the boiler. The thermal
cooker has a predisposition for this solution.
The thermal discharge system allows to cool
directly the boiler when it is necessary by
3 7 2 4 5
745
676
463
438
87
108
236
390
447
ST 60
4 2 5 7
799
763
484
498
serious danger of explosion of the boiler
and serious injury risk for the people present
near the thermal cooker.
For this reason, we recommend to follow
strictly what is written in UNI 10412-2 law
in the various cases and we suggest also to
insert in the system also a boiler able to ac-
cumulate the heating in excess produced as
sanitary hot water.
making flow cold leaking water in a sepa-
rate circuit inside the boiler.
The making of the thermal discharge system
is under responsibility of the installer. All
the components of the thermal discharge
system external to the thermal cooker must
70
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802
792
741
691
455
435
102
300