Anti-Legionella Function; Combustion Check - Riello RESIDENCE HM Series Instructions For The User

5.6 Screed heater function
For a low temperature system, the boiler has a "screed heater" function
that can be activated in the following way:
ƒ set the boiler to OFF by pressing the button
able in this operating state)
ƒ access technical parameters
firm; the display shows:
The screed heater function lasts 168 hours (7 days) during which, in the
zones configured as low temperature, a heating request is simulated with
an initial zone outlet of 20°C, then increased in line with the table below.
By accessing the INFO menu from the main screen of the interface, it
is possible to display the value of I001, relating to the number of hours
elapsed since the function was activated. Once activated, the function
takes priority, if the machine is shut down by disconnecting the power
supply, when it is restarted the function picks up from where it was
interrupted. The function can be interrupted before its end by switching
the boiler to a state other than OFF or by selecting P409= 0 from the
menu P4.
DAY TIME
1 0
6
12
18
2 0
12
3 0
4 0
5 0
6 0
7 0
Note: The temperature and increase values can be set to different values
only by qualified personnel, only if strictly necessary. The manufacturer
declines all responsibility if the parameters are incorrectly set.
In the INFO menu, line I001 displays the number of hours elapsed
since the activation of the function.
5.7 Sliding delivery
(only if water tank connected)
The parameter P507 allows you to activate the MODULATING TANK
SUPPLY TEMP function for changing the delivery setpoint used by the
boiler, when in domestic hot water request mode. The factory setting for
this parameter is = 0 (function not active), which provides for a modulation
to a fixed delivery of 80°C, when in domestic hot water request mode.
Setting the parameter P507=1 (function active) the delivery setpoint is no
longer fixed at 80°C, but can be changed and calculated automatically by
the boiler on the basis of the difference between the desired domestic hot
water setpoint and the temperature measured by the water tank probe.
Note: it is not advisable to activate this function for water tanks with a
capacity greater than 100 litres, loading the cylinder would be too slow. It
might be necessary to reset the value of this parameter when replacing
the adjustment board.
5.8

Anti-legionella function

water tank with probe and OT+ connection not present)
The machine has an automatic ANTI-LEGIONELLA function that, daily
or weekly depending on the settings selected, if necessary heats the
domestic hot water at 65°C keeping it at that temperature for 30 minutes,
thereby destroying any proliferation of bacteria in the water tank.
The function is not carried out if the temperature of the water tank rea-
ched 65°C over the last 24h, for daily scheduling, or in the last 7 days, in
the case of weekly scheduling.
b
The function is not carried out with the boiler set to OFF.
Note: if the OT+ chrono is present and connected (par. P803 = 1) the
anti-legionella function is delegated to the OT+ chronothermostat.
The ANTILEGIONELLA function is activated via par. P501 in the fol-
lowing way:
(function only avail-
P4 P409 = 1 con-
TEMPERATURE
20°C
22°C
24°C
26°C
28°C
30°C
32°C
35°C
35°C
30°C
25°C
(only if connected to a
P501 = 0 function deactivated
P501 = 1 function active on a weekly basis
P501 = 2 function active on a daily basis
The first time the function is performed with a delay of parameter P502
(hours) from its activation and subsequently with a daily (24h) or we-
ekly (168h) frequency depending on the value of par. P501. In the INFO
menu, item I045 indicates the number of days left until the next anti-le-
gionella function is performed.
During execution, the display shows:
b
Once running, the function takes on maximum priority and cannot
be interrupted; however, it can be temporarily suspended by setting
the boiler to OFF or by interrupting the power supply. When restar-
ted, the anti-legionella cycle resumes from where it was interrupted.
If the anti-legionella function is interrupted due to exceeding the maxi-
mum time (4h), the display shows:
In this condition, the system retries the execution the next day. The boiler
continues to operate regularly, the "ALEG" signal with a flashing bell is
displayed only when the boiler is in stand-by.
5.9 Checks during and after the initial start-up
After starting up, check that the boiler carries out the start-up procedures
and subsequent shut-down properly.
ƒ Check the domestic hot water operation by opening a hot water tap in
SUMMER mode or WINTER mode.
ƒ Check the full stop of the boiler by turning off the system's main
switch.
ƒ After a couple of minutes of continuous operation to be obtained by
turning the system's main switch to "on", setting the boiler mode se-
lector to Summer and by keeping open the domestic hot water device,
the binders and manufacturing waste evaporate; only subsequently it
will be possible to control combustion.

5.10 Combustion check

b
The checks of the settings of CO
parameters, indicated in the tables below, must be carried out with
the casing closed.
To carry out the combustion analysis, proceed as follows:
1
14
in relation to the reference
2
2
3
The probe for the fumes
analysis must be inserted until
it reaches the stop.