36
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3.9 ZONES MANAGEMENT BOARD
The zones control unit can be configured using
the selector switches on the unit (14 Fig. 3-5)
via which you can choose between the follow-
ing options:
n°
OFF
ON
S25
1 Homogeneous
zones control
Mixed zones
control
2
N° 1 mixed zone
(Z2)
N° 2 mixed zones
(Z2 and Z3)
3
Master board
Slave board
S26
4 Main zone =
zone 1
Main zone =
zone 2
5 Super CAR: main
zone flow control
Super CAR: sys-
tem flow control
6
Mixed zones
max. tempera-
ture = 50°C
Mixed zones max.
temperature =
75°C
S27
7
Normal func-
tioning
Multizone recog-
nition state
8
Not used
Not used
9
Mixed zones
minimum tem-
perature = 25°C
Mixed zones min-
imum tempera-
ture = 35°C
Note:
the default settings are highlighted in bold.
- S26 (6) in the event of the setting with max.
flow temperature of 75°C, the relative safety
thermostat must be replaced with the one
suitable for supporting this temperature.
Warnings.
Various LEDs are present on the
board to display the functioning status and to
indicate any anomalies.
The LEDs from 1 to 7 (13 Fig. 3-5) identify the
activation of the relative relay:
- LED H1 Direct zone 1 activation.
- LED H2 mixed zone 2 activation.
- LED H3 mixed zone 3 activation (optional).
- LED H4 mixer opening mixed zone 2.
- LED H5 mixer closing mixed zone 2.
- LED H6 mixer opening mixed zone 3 (optional).
- LED H7 mixer closing mixed zone 3 (optional).
The LED H11 signals that the zones management
board is powered.
LEDs 8 and 9 indicate the functioning status of
the board:
Warning
H8
H9
H10
CH request presence
ON
OFF
OFF
Disabling of active
zones
ON L OFF
OFF
Mixed zone 2
safety thermostat
intervention
OFF
ON
OFF
Mixed zone 2
probe fault
OFF ON L OFF
Mixed zone 3
safety thermostat
intervention
OFF
OFF
ON
Mixed zone 3
probe fault
OFF
OFF ON L
Bus IMG anomaly
OFF ON A ON A
IMG communication
present
OFF
OFF ON F
Key:
ON = ON
OFF = OFF
ON L = Slow flashing (0.6 s on , 0.6 s off)
ON V = Fast flashing (0.3 s on, 0.3 s off)
ON F = Flash flashing (0.2 s on, 1 s off)
ON A = Alternate flashing
3.10 ''CHIMNEY SWEEP'' FUNCTION.
If this function is activated it takes boiler func-
tioning to the adjustable power of the central
heating selector switch.
In this state all adjustments are excluded and only
the safety thermostat and the limit thermostat
remain active. To activate the chimney sweep
function press the Reset button "C" for 8 to 15
seconds in absence of domestic hot water and
heating requests. Its activation is signalled by
the relative symbol (22 Fig. 2-1). This function
allows the technician to check the combustion
parameters. After the checks deactivate the func-
tion, switching the boiler off and then on again
using the Stand-by button.
3.11 PUMP ANTI-BLOCK FUNCTION.
The boiler has a function that starts the pump at
least once every 24 hours for the duration of 30
seconds in order to reduce the risk of the pump
becoming blocked due to prolonged inactivity.
3.12 THREE-WAY ANTI-BLOCK
FUNCTION.
Both in “domestic hot water” and in “domestic
hot water-central heating” phase the boiler is
equipped with a function that starts the three-
way motorised group 24 hours after it was last
in operation, running it for a full cycle so as to
reduce the risk of the three-way group becoming
blocked due to prolonged inactivity.
3.13 RADIATORS ANTIFREEZE
FUNCTION.
If the system return water is close to freezing,
the boiler starts up until it reaches a safety
temperature.
3.14 P.C.B. PERIODICAL SELF-CHECK.
During functioning in central heating mode or
with boiler in standby, the function activates
every 18 hours after the last boiler check/power
supply. In case of functioning in domestic hot
water mode the self-check starts within 10 min-
utes after the end of the withdrawing in progress,
for duration of approx. 10 seconds.
N.B.:
during self-check, the boiler remains off.
3.15 AUTOMATIC VENT FUNCTION.
In the case of new central heating systems and
in particular mode for floor systems, it is very
important that dearation is performed correctly.
To activate function “F8” press buttons “A and
B” at the same time (Fig. 2-1) for 5 seconds with
the boiler in stand-by. The function consists of
the cyclic activation of the pump (100 s ON, 20
s OFF) and the 3-way valve (120 s domestic hot
water, 120 s central heating). The function ends
after 18 hours or by switching the boiler on using
the ignition button “
”.
M5 menu
(password must be entered)
1st Level
2nd Level
Options
Description
Default
value
Value set by
the techni-
cian
RELE3
(optional)
RELE3-0
Relay 3 not used
RELE3-0
RELE3-1
Check the storage tank recirculation pump
RELE3-2
The relay signals the intervention of a boiler block (Can be coupled to an
external signalling device, not supplied)
RELE3-3
The relay signals that the boiler is on and in the heating stage
(Can be coupled with an external circulator pump, not supplied)
RELE3-4
Controls the opening of an external gas valve in concomitance with an
ignition request of the boiler burner
RELE3-5
Function not available in this boiler model
RELE3-6
In the event the boiler circulator pump is replaced with a traditional fixed
speed circulator pump one must connect the new circulator pump to the
relay board
P76
-15°C ÷
+14°C
CE
With S34 = On. If the reading of the external probe is not correct it is possible
to correct it in order to compensate any environmental factors
With S34 = Off and system supervisor connected set the parameter to
maximum until CE value is displayed
0°C
