Scheduled Program - Riello Condexa PRO NA 75P Installation, Operation And Service Manual

COMMISSIONING AND MAINTENANCE
Priority setting
Parameter 42 sets the priorities between the DHW and CH circuit.
Four modes are available:
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 on 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
is satisfied
1 Off: priority is to the heating circuit
2 On: priority is 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 production of domestic hot water is activated (Par. 35= 1
or 2), using parameters 107 and 108 it is possible to carry out week-
ly scheduling of the "Anti-legionella" function.
Parameter 107 sets the day of the week in which the activity is per-
formed, while parameter 108 sets the time.
At the planned time, the boiler generates a call for the DHW in-
direct storage tank with a pre-set set-point of 140 °F (60 °C) (not
adjustable). After reaching 140 °F (60 °C), the temperature is main-
tained for 30 minutes, during which the system checks that the
sensor's temperature does not fall below 134.6 °F (57 °C). At the
end of this time interval, the Anti-Legionella function stops and
standard operation of the boiler is resumed.
Operation in "Anti-Legionella" mode has priority over other de-
mands independently from the setting of the parameter 42.
Par.
Description
No.
Sets the weekday on which the anti-Legionella proce-
107
dure is carried out.
Sets the time of the day during which the anti-Legionella
108
procedure is carried out.

4.7.6 Scheduled program

The scheduled program is designed to program the operation of
the various circuits managed by the boiler, (CH, DHW and addi-
tional mixed zones).
Seasonal Program
The seasonal program is used to exclude additional mixed zones
during the summer season.
It does not control any DHW parameter.
Holiday program
The holiday program is used to exclude part of or all the circuits 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 central-
ized 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 de-
sired setting.
Clock Program
" "
Program Group
" "
Burn hours till service
"
Reset Service Reminder
"
Holiday Settings
" "
The time program includes the following parameters:
Group Programming
Group 1
" "
Group Holiday
" "
"
"
It enables the user to select a group to add zones to the select-
ed 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 ability to choose
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)]
Select Ext. Zones in Group
"
External Zone CH
" " "
" "
" "
" "
74
"
"
Enabled
" "
"
"
1
"
Disabled
" " "
" "
" "
" "