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USER MANUAL – Release 1.2 of 01/01/2010
Page 142 of 191
Version: 02/03/2010
53.1.1 CONTINUOUS WORKING OF THE DOMESTIC HOT WATER PUMP
If the parameter
FS28
=1 (domestic hot water pump operational mode), domestic hot water pump switch-on
is linked to unit switch-on. In this case, times FS26 and FS28 are not considered.
53.2
ANTILEGIONELLA FUNCTION
The antilegionella function can be activated using parameter
FS12
.
•
FS12 = 0
: at intervals of time between two successive antilegionella cycles, the antilegionella
procedure is activated when time
FS13
has passed from the last activation. The timer is always active
both with the unit on and with unit in remote OFF or stand-by. If there is no power supply, the timer
value is memorised and the count re-starts the next time the unit is switched-on.
•
FS12 = 1
: time period (the day of activation must always be set
FS18
along with the start time
FS17
).
To disable the function, set the parameters FS12=0 and FS13=0 or FS12=1 and FS18=0.
If FS12=1 and the clock is in error, the function is disabled.
The function is activated with the unit running. If the antilegionella cycle request takes place with the unit off
or in stand-by, the antilegionella cycle will be activated immediately on successive switch-on if the priority is
given to the production of domestic hot water. If, however, the priority is given to temperature control, the
antilegionella cycle will be carried out when the cooling/heating set is satisfied.
The function must remain active for the minimum time set via the parameter
FS19
(active from when the
temperature of the domestic hot water reaches the antilegionella set-point) and can last for a maximum time
FS20
.
All compressors and all heaters configured for domestic hot water will be on (eventually the compressors will
be switched-off by the unloading) in order to take the water to set-point. Once the set-point has been
satisfied, the compressors are switched-off in succession with delay defined by the parameter CO5, while
the heaters are switched off on reaching the set-point
FS14
+ band
FS21
.
During the minimum working time antilegionella mode, the compressors and the heaterss are forced on.
Once this procedure has been concluded, the controller goes back to domestic hot water production or to
normal temperature control.
If the parameter FS02 (Working priority) is set as priority to regulation and antilegionella production must be
active, this will only take place when the regulation set-point has been reached.
The antilegionella cycle must always be terminated before passing to temperature control also if the
parameter FS02 gives the priority to temperature control.
53.3
MANAGEMENT OF THE PRIORITY BETWEEN THE PRODUCTION OF
DOMESTIC HOT WATER AND WATER CIRCUIT UTILITIES
If the parameter FS02 is set at 0
the priority is given to the production of domestic hot water (or
antilegionella). Once the production of domestic hot water has been satisfied, proceed with production of
water for the utilities (if requested).
If the parameter FS02 is set at 1
the priority is given to the production of water for the utilities circuit with
classic temperature control. Once the utilities have been satisfied, proceed with the production of domestic
hot water.
If temperature control is requested during the antilegionella cycle, this is interrupted to give way to the
temperature control request.
If defrost is requested, this has priority over the production of domestic hot water or antilegionella also if
FS02=0.
53.4
SOLAR PANELS WATER PUMP
The solar panels pump is enabled with the setting of an appropriately configured relay.
