Riello Residence Condens 25 KIS n Manuel De L'installateur Et De L'utilisateur page 11

fig. M
4.3 Temporary switch-off
In the event of temporary absences (weekends, short trips, etc.) set
the mode selector to (off/reset) (fig. N).
The digital display is as shown opposite ("- -") (fig. O).
fig. N
fig. O
While the electrical supply and the fuel supply remain active, the boil-
er is protected by the systems:
Antifreeze
- heating: the function is activated if the temperature measured by
the outlet probe drops below 6° C. A heat request is generated in
this phase with the ignition of the burner at minimum output, which
is maintained until the water temperature reaches 35° C;
- domestic hot water: the function is activated if the temperature
measured by the domestic water probe drops below 4° C. A heat
request is generated in this phase with the ignition of the burner at
minimum output, which is maintained until the water temperature
reaches 55° C.
During the anti-freeze phase the blinking letters AF are shown on the
display (fig. P).
fig. P
Circulator anti-blocking
- The circulator activates every 24 hours of stop for 30 seconds.
4.4 Switching off for lengthy periods
If the boiler is not used for a long time, the following operations must
be carried out:
- position the mode selector to
- set the system's main switch to "off" (fig. R),
(off/reset) (fig. Q),
fig. Q
fig. R
- Turn off the fuel and water taps of the heating and domestic hot
water system.
In this case, the anti-freeze and anti-blocking systems are de-
activated. Drain the heating and domestic water system if there
is any risk of freezing.
4.5 Circulator setting
Circulator residual discharge head
The boiler is equipped with a high efficiency modulating circulator
that is already hydraulically and electrically connected, the available
performance of which are shown in the graph "Constant residual dis-
charge head curve".
The circulator is factory set with discharge head of 6 meters.
The boiler is equipped with an anti-blocking system which starts up
an operation cycle after every 24 hours of stop, with the mode selec-
tor in any position.
The "anti-locking" function is only activated when the boiler is
electrically powered.
It is strictly forbidden to operate the circulator without water.
Where there is the need to use a different curve, the desired level can
be selected on the circulator.
The main characteristics and how to set the desired operation are
described below.
User interface
The user interface comprises a button (A), a red/green bi-colour LED
(B) and four yellow LEDs (C) in line (fig. S).
fig. S
The user interface allows to view the operating performance (oper-
ating status and alarm status) and set the operating mode of the
circulator.
The performance, indicated by LEDs (B) and (C) are always visible
during the normal operation of the circulator, while the settings are
made by pressing button (A) (fig. S).
Indication of the operating status
When the circulator is operating, LED (B) is green (fig. S). The four
yellow LEDs (C) indicate the consumption of electric power (P1) as
shown in the following table
LED status CIRCULATOR status
Green LED on +
1 yellow LED on
Green LED on +
2 yellow LEDs on
Consumption in
% of P1 MAX (*)
Minimum operation 0÷25
Minimum-medium
25÷50
operation
ENGLISH
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