Riello HRT-177RS Manuel D'installation Et D'utilisation page 21

PAR. DESCRIPTION
FROST PROTECTION TEMPERATURE: The
weekly room thermostat has an internal an-
ti-frost function that switches on the boiler (only
when the boiler is properly set to allow the room
thermostat to activate/deactivate the boiler, i.e.
boiler in winter mode) if the room temperature
drops below the selected temperature. This
function is active all the time whatever the pro-
gramming time or the set temperature. By en-
tering the 02 parameter it is possible to adjust
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the frost protection temperature: the factory
setting is 5°C, the 02 parameter can be adjus-
ted between 3°C and 10°C. the frost protection
selected temperature becomes the minimum
settable value for the economy temperature (in-
side the main menu). WARNING! This anti-frost
protection is not intended to be the main con-
trol to protect the entire heating system and the
boiler during a freezing period.
HYSTERESIS OFF: The value selected with
this parameter indicates when the heat request
is stopped. The factory setting is 0,4°C, val-
ues range between 0,0°C and 2,0°C. Heat re-
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quests switch OFF when the room temperature
reaches the room target temperature plus the
hysteresis OFF value.
PAR. DESCRIPTION
HYSTERESIS ON: The value selected with this
parameter indicates when the heat request is
activated. The factory setting is 0,2°C, values
range between 0,0°C and 2,0°C. Heat requests
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switch ON when the room temperature drop
below the room target temperature minus the
hysteresis ON value.
ENCODING: The coupling between the re-
ceiver and the transmitter is factory done, how-
ever if necessary it is possible to make again
the coupling. Selecting the parameter the func-
tion start, press the button on the receiver for 5
seconds, the green led start to blink regularly.
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When the codifi cation has been concluded (this
will take up to few minutes), the led stops to
blink and this will confi rm the coupling done. On
the transmitter press the encoder to enter and
escape.
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