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SFK 28 - RAD - ING - Manuale - 1801.1_V3
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1. INSTALLATION
INST
ALLER
1.1.10. RECIRCULATION MODE
The tankless water heater has within, as
standard,a recirculation system c/w circulating
pump which is aimed to provide a better well-being
for the domestic hot water needs, thus delivering
immediately a large amount of hot water.
To activate the recirculation mode, please proceed
as follows:
› turn the diverter valve onto the position
“recirculation”, as shown ‘RC’ in figure 1.
› activate the recirculation mode by pressing
simultaneously the ‘
’ and ‘
’ buttons of
the control panel (fig. 2). The activation of the
recirculation mode is displayed onto the control
panel by means of the ‘rc’ symbol.
› adjust the setting of the return temperature by
pressing ‘
’ and ‘
’ (fig. 3). The activation of
the pump is displayed onto the control panel by
means of the pump ‘
’ symbol.
To detect the return temperature, the system
activates the pump for 20 seconds every 10
minutes.
If the temperature detected therein, by the
recirculation sensor, is lower than the required
one, the pump activates and the appliance operates
at the minimum fire rating.
When the required temperature is achieved,
the appliance shuts-off and the pump runs for
40 seconds (this latter value can be adjusted by
means of parameter P04). The highest possible
temperature of the domestic hot water, during
the recirculation mode, is of 53 °C. When this
temperature is achieved, the appliance shuts-off
whilst the pump keeps running. The appliance is
activated again when the temperature falls to 50 °C.
RC
fig. 1
fig. 2
fig. 3
