58
COMMISSIONING AND MAINTENANCE
Priority setting
The parameter 42 sets the priorities between the DHW and CH
circuit.
Four modes are envisaged:
0
Time
: timed priority between the two circuits. In the event
of a simultaneous demand, initially the domestic hot water
circuit is made to operate for a number of minutes equal to
the value assigned to the parameter 43. At the end of this
time period, the CH circuit is operated (also for the same
amount of time) and so on until demand for one or the
other circuit stops
1
Off
: priority given to the heating circuit
2
On
: priority allocated to the DHW circuit
3
Parallel
: simultaneous operation of both circuits provided
that the delivery temperature requested by the DHW circuit
is lower than or equal to the setpoint requested by the
heating circuit. When the temperature requested by the
DHW circuit exceeds the heating setpoint, the circulation
pump of the heating is turned off and priority is switched
to the DHW.
Anti-Legionella function
When the domestic hot water production is active (only with Par.
35=1), using the parameters 107 and 108 it is possible to make a
weekly programming of the “Anti Legionella” function.
Parameter 107 sets the day of the week on which the activity is
performed, whilst parameter 108 sets the time.
At the planned time, the thermal module generates a heat de-
mand for DHW storage tank with a pre-set set-point of 60°C (not
adjustable). After reaching 60°C, the temperature is maintained
for 30 minutes, during which the system checks that the probe's
temperature does not fall below 57°C. At the end of this time
interval, the Anti-Legionella function stops and standard oper-
ation of the thermal module is resumed.
Operation in “Anti-Legionella” mode has priority over other de-
mands independently from the setting of the parameter42.
Par.
No. Description
107
Sets the weekday on which the anti-Legionella proce-
dure is carried out.
108 Sets the time of the day during which the anti-Le-
gionella procedure is carried out.
3.2.6
Scheduled programme
The Scheduled Programme is designed to program the opera-
tion of the various circuits managed by the thermal module, (CH,
DHW and additional mixed zones).
Seasonal Programme
The Seasonal Programme is use to exclude additional mixed
zones during the summer season.
It does not control any DHW parameter.
Holiday Programme
The Holiday Programme is used to exclude part of or all the cir-
cuits at a certain time of the year.
A holiday can be set both on the full system and on various
groups of circuits.
The group system enables the user to add various circuits to the
group to set a holiday period for several circuits at the same
time. (For instance, to manage a semi-detached house with a
centralised heating system when one of the two families is on
holiday and the other is not).
The set-point type can be adjusted so as to correspond to the
desired setting.
The system can control up to a total of 16 "Mixed" zones. The
programming of mixed areas is only allowed with an accessory.
At the same time as these 16 areas, it is also possible to enable
the CH zone (direct zone for central heating only).
“
Clock Program
”
“
Program Group
”
“
Burn hours till service
”
“
Reset Service Reminder
”
“
Holiday Settings
”
The time programme includes the following parameters:
Group Programming
“
Group
”
1
“
Group Holiday
”
“
Enabled
”
“
Select Ext. Zones in Group
”
“
Select Dep. Zones in Group
”
It enables the user to select a group to add zones to the selected
group. It also enables the user to enable/disable the group in
question.
Group settings are used to add zones to the groups.
The “Group programming” menu enables the use to chose
among 8 groups. Each of them can be enabled or disabled.
Within it, it is possible to select zones to be added to the group
(direct zone (CH) - mixed zones from 1 to 16)
