Italtherm CITY MAX 26 K, Инструкция по эксплуатации

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Green Heating Technology
36
SW1
OFF Natural gas (G20) Functioning.
ON Propane (G31) Functioning.
The factory setting depends on the gas type arranged in factory for the boiler. To change
the type of gas supply, it is necessary to follow the complete instructions described in the
paragraph "Gas conversion" on page 36.
SW2
Adjustment range for heating system flow temperature.
OFF Normal
setting, suitable for traditional radiators systems. It allows to select a heating
system temperature within the standard range from 35°C to 78°C. Factory setting.
ON
Reduced setting, suitable for low temperature systems. It allows to select a heating
system temperature within the reduced range from 20°C to 45°C.
Remark: If the boiler supplies a mixed type system (high and low temperature)
through the suitable optional kit, use the reduced range (ON) (refer also to the
documentation supplied with the kit).
SW3
It determines the delay of 3 minutes, before the new ignition of the burner after the over-
coming of the heating set temperature.
OFF delay ON (for normal radiators systems). Factory setting.
ON delay OFF (for fan coil systems).
SW4
It determinates the temperatures for the burner to be turned ON and OFF during the DHW
work.
OFF
burner OFF at 75°C and burner ON at 60°C. Factory setting.
ON burner OFF at the set DHW temperature (T.SET) + 3°C, and burner ON at T.SET + 2°C.
SW5
Pump functioning mode during heating working.
OFF
intermittent for normal applications (with or without delay, see SW3).
Factory setting.
ON
always off (external pumps are present).
Remark: The pump will be anyway activated in all other circumstances, e.g. during the DHW functioning,
for post-circulation (if foreseen ) or for anti-freezing or anti-lockout functions.
SW6
OFF In City Max "F" boilers it must be OFF . Factory setting.
Gas conversion
ATTENTION: the operations described below must be carried out only by qualified personnel
[authorized by ITALTHERM S.r.l.] .
For gas conversion, use the components supplied by boiler manufacturer only.
Using Commercial Propane G31, it is absolutely necessary to install a suitable pressure re-
ducer upstream the boiler.
This boiler is designed and prepared to be supplied with Natural Gas G20 (Methane) or Com-
mercial Propane G31. A qualified technician can convert it to operate with one of these two
types of gas above said.
It must never be used with Butane gas G30
(that can be present in the portable gas bottles for
cookers)
therefore, it's important to inform, about this, the supplier of the fuel.