Immergas 3.030908 Instruction And Warning Book page 14

2.9 GENERAL REMARKS ON BOILER OPERATION WITH WIRELESS ROOM PROBES
The wireless room probe (with concentrator) allows the measurement of the room temperature and the sending of this value to the boiler
control panel, where it is possible to set a weekly program for room temperature control through the display board. There is no manual
command or adjustment (available to the user) of the room control on the probe.
The button on the probe and on the concentrator has no function for the final user, who is recommended not to perform any action on this
button.
Timetable
The setting of the day - current time, together with the temperature control programs (calendars) and the desired room temperatures can be
activated on the Boiler menu. The same operating mode of the programs or the heating function can be accessed on the boiler menus. See boiler
instructions.
Room anti-freeze function
The room anti-freeze protection is activated when the zone operation mode is set as Off and the boiler is in Winter mode.
It is possible to disable the antifreeze function on the menu through Service access. See boiler instructions
The room anti-freeze function intervention temperature can be set (from +0.5 to + 10°C) through the menu with Service access; factory
setting is +5°C. See boiler instructions
With zone operation = Off, if the room sensor fails, the boiler will NEVER re-ceive any room heating request (not even in the case of
antifreeze). Only boiler antifreeze function will remain active.
If you want to ensure that the room is protected from freezing (even in the pres-ence of any faults on the sensors), it is possible to select the
Manual operation mode on the zone and set the minimum ambient set; in these conditions, the probe failure produces a request for
operation (permanent 24 hours a day) in heating with minimum flow set point.
Boiler flow temperature with modulating room probe
If the "Module with room probe" function is activated (See boiler instruc-tions), the boiler will automatically manage the flow
temperature, making it correlated to the actual room requirements. The boiler flow temperature will vary between the maximum and
minimum values set on the zone parameters (See boiler instructions), and will gradually be lowered when the room reaches the desired
temperature.
By deactivating the "Modul. with room probe" function, the boiler delivery temperature will remain fixed at the maximum value set on the
zone parameters for the entire heating request time.
If there are several zones with more probes, the boiler will offer the highest flow temperature among the various requests by the various
zones. A different maximum delivery temperature and minimum delivery temperature can be defined for each individual zone.
Operation with external probe
If the "Modul. with external probe" function is activated (See boiler instructions), the boiler will automatically manage the flow temperature
making it correlated to the detected external temperature. The boiler flow temperature will vary between the maximum and minimum
values (related to Min. ext. T and Max. ext. T) set on the zone parameters (See boiler instructions).
By deactivating the "Modul. with external probe" function, the boiler delivery temperature will remain fixed at the maximum value set on
the zone parameters for the entire heating request time.
If there are several zones with more probes, the boiler will offer the highest flow temperature among the various requests by the various zones.
For each single zone it is possible to define a different value of maximum flow temperature and minimum flow temperature correlated to
the minimum and maximum external temperatures.
Combined operation of wireless room probe with external probe
If the "Modul. with external probe" and "Modul, with room probe" functions are kept active, the combined operation of the wireless room probe
and the external probe allows the boiler flow temperature calculation actions to be added together.
The flow temperature calculation function depending on the external tempera-ture will determine the maximum flow temperature for the
zone (correlated to the external temperature of that moment). The room probe may further decrease its value depending on the rising in room
temperature.
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