BLUEHELIX TECH RRT 28 C
152
EN
cod. 3541N260 - Rev. 01 - 10/2017
Boiler electrically powered
Switch on the power to the boiler.
•
During the first 5 seconds the display shows the card software version (fig. 5).
•
For the following 20 seconds the display will show
FH
which identifies the heating system air venting cycle with the
fan running (fig. 6).
•
In the next 280 seconds, the venting cycle continues with the fan off (fig. 7).
•
Open the gas valve ahead of the boiler
•
When the message
Fh
disappears, the boiler is ready to operate automatically whenever domestic hot water is
drawn or in case of a room thermostat demand
Turning the boiler off and on
It is possible to switch from one mode to another by pressing the
winter/summer/off
button for about one second, fol-
lowing the sequence given in fig. 8.
A =Winter
mode
B =Summer
mode
C =Off
mode
To turn the boiler off, press the
summer/winter/off
button (detail 7 - fig. 1) repeatedly until the display shows dashes.
fig. 8- Turning the boiler off
When the boiler is turned off, the PCB is still powered. Domestic hot water and heating are disabled. The frost protection
system remains activated. To switch the boiler back on, press the
summer/winter/off
button again (detail 7 - fig. 1).
fig. 9
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. To avoid dam-
age caused by freezing during long shutdowns in winter, it is advisable to drain all water from the boiler, the
DHW circuit and the heating system water; or drain just the DHW circuit and add a suitable antifreeze to the
heating system, as prescribed in sec. 2.3.
NOTE
- If the display does not show the
sun
symbol but there are the multi-function numbers, the boiler is in “
Winter”
mode.
fig. 5- Switching on / Software version
fig. 6- Vent with fan on
fig. 7- Vent with fan off
A
B
C
