37
- generate the heat demand using the room thermo-
stat. The system will operate at maximum power, in-
dicating “H” on the display followed by the delivery
temperature (flue cleaning function)
- combustion can be checked by unscrewing the cap
(4) and inserting the analyser sensor in the foreseen
position
4
- once the check is complete, stop the flue cleaning
function by pressing
“Set/esc”
- stop the heat demand
- remove the analyser sensor and carefully retighten
the cap (4).
FAN SPEED
The fan speed is controlled automatically based on the gas
type and the length of the flue gas exhaust line (L).
This information is managed by parameter 36.
To make the change:
- access “INSTALLER PROGRAMMING mode" follow-
ing the procedure described in the "User interface"
chapter and set parameter 36 to:
01 = natural gas and L<15 m
02 = natural gas and L>15 m
03 = LPG and L<15 m
04 = LPG and L>15 m.
The
Power Plus Box
systems are supplied for operation with
G20 (natural gas), with a flue gas exhaust line with L<15m
(parameter 36=01).
b
All checks must be performed by Technical Assis-
tance Centre.
3 3 Adjusting the functional
parameters
The heating functions can be set for the high temperature,
low temperature and DHW circuits based on the system
requirements by setting the functional parameters.
The first three parameters can be accessed on the user
level. The next three require a password (“22”, see the "IN-
STALLER PROGRAMMING mode" chapter in the "User
interface" chapter.
To access the user parameters, press the button, and
the following values will be displayed in order:
- manifold delivery temperature T1
- DHW temperature T3
- low temperature circuit delivery temperature T6.
To change the relative setpoints:
- press the
"Set/esc"
button: the relative value will ap-
pear, the two digits on the right will flash
- press and until obtaining the required value.
Press
"OK"
to save the new value. The displayed val-
ue will stop flashing after 3 sec and will be operative.
A detailed description of all the parameters and the factory
preset values can be found in the "Parameter list" chapter.