55
4598010_00
GB
The third window of the PLANT SETUP allows the installer to
set the logic with which to manage rotation of switching units
on and off according to the load requested by the plant; this
window displays the following information:
- Type of logic for rotation of units (
1
): indicates which
option is currently active to manage switching on or off
rotation.
From this window it is possible to:
(1) Activate or deactivate the reserve chiller function: pressing
the key
C
will allow you to enter the modifi cation mode and the
value will be highlighted; by pressing the keys
A
or
B
it will be
possible to modify the value currently displayed, while pressing
the key
C
will confi rm this choice; the possible logics which can
be activated are:
- FIXED SEQUENCE: in this logic, the units will be switched on
according to a fi xed sequence (Unit 1, Unit 2, Unit 3, Unit 4), and
switched off again according to a fi xed sequence (Unit 4, Unit 3,
Unit 2, Unit 1).
- BALANCED SEQUENCE: in this logic, the units will be switched
on and off according to the actual working hours; the unit with the
least working hours will be switched on fi rst, then continuing the
remaining units with the same logic, while the unit with the most
working hours will be switched off fi rst, applying the same logic
for switching the units off; this rotation method assures that all the
units are switched on and off in order to balance the operating
hours.
(2) Pass on to the next window:
to go to the next window of this menu, press the key
B
.
(3) Go back to the previous window:
to go back to the previous window of this menu, press the
key
A
.
(4) Exit this window:
press the key
D
to return to the selection of the USER menus.
• Setting type of unit rotation (Password 303):
!
The “type of rotation” parameter is not taken into consideration for switching the heat pumps
on and off during the DHW production procedure. In this mode, the rule managing rotation is
FIFO (fi rst in fi rst out) and is linked to the index of the unit (ModBus serial address).
A
B
C
ESC
D
Units act.sequence
SEQUENCE
TIUE BASED
1
Units act.sequence
SEQUENCE
TIUE BASED