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When the boiler is turned off, the printed circuit board
is still powered. Domestic hot water and heating are
disabled. The frost protection system remains activat-
ed. To operate the boiler normally, press the winter/
summer/off button (detail 7 - fig. 1) twice.
The boiler will be immediately ready in Winter and DHW mode.
B
The frost protection system does not work when the power and/or gas to the unit are turned off. In winter to
avoid damage to the entire system caused by freezing during long periods of shutdown, it is advisable to fit an
external frost protection kit..
NOTE - If the sun symbol does not appear on the display but the multifunction numbers are present, the boiler is
in"Winter" mode.
1.4 Adjustments
Winter/summer switchover
Press the winter/summer/off button (detail 7 - fig. 1)
until the display shows the Summer symbol (detail 10
- fig. 1): the boiler will only deliver domestic hot water.
The frost protection system remains activated.
To reactivate the Winter mode, press the winter/sum-
mer/off button (detail 7 - fig. 1) twice.
NOTE:- Do not hold the winter/summer/off button "in"
as you will enter the OTC zone mode & the screen will
display as shown
press & hold the winter/summer/off button until the dis-
play returns to its normal mode.
Heating temperature adjustment
Use the heating buttons (details 3 and 4 - fig. 1) to ad-
just the temperature from a min. of 20°C to a max. of
75°C.
6
BLUEHELIX PRO RRT 24 C
should this occur please
cod. 3541T010 - Rev. 00 - 10/2019
fig. 9
fig. 10
fig. 11
fig. 12
EN
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