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7105764.02 (1-11/12)
11.2.2 EXTERNAL STORAGE BOILER
(only for models 1.12 - 1.24)
CONNECTING THE STORAGE BOILER SENSOR
The boiler can be electrically connected to an external storage boiler. A diagram of the hydraulic connection of the external storage
boiler is shown in annex
“SECTION” F
. Connect the DHW priority sensor NTC to terminals
5-6
on terminal block
M2
. The sen-
sitive element of the NTC sensor must be inserted in the special well located on the storage boiler. Make sure that the exchange
capacity of the storage boiler coil is appropriate for the power of the boiler. Adjust DHW temperature (+35°C...+60°C) by pressing
.
IMPORTANT: set parameter P03 = 05 as described in section 14.
ELECTRICAL CONNECTION TO 3-WAY VALVE MOTOR
The 3-way valve motor and relative wiring harness are supplied separately in the form of a kit. Connect the plugs on the 3-way
valve wiring harness to terminals
8-9-10
of the
M2
terminal block on the boiler.
12. SPECIAL FUNCTIONS
12.1 INITIAL IGNITION
When lighting the boiler for the first time perform the following procedure. After electrically powering the boiler the code “
000
”
appears on the display. This means the appliance is ready for the “
initial lighting
” procedure.
Press
together and hold down for 6 seconds. “
On
” appears on the display for 2 seconds followed by code “
312
” indicating
that the “
system venting
” function is active. This function lasts 10 minutes.
During initial ignition, the burner may not ignite (causing the boiler to shut down) until any air in the gas pipes is vented.
In this case, repeat the ignition procedure until gas reaches the burner. To reset boiler operation, press
for at least 2
seconds.
If the venting function is interrupted by a power blackout, start the function again when power is restored by pressing
and
together and holding them down for at least 6 seconds. If the display shows fault E118 (low pressure in hydraulic
circuit) during the venting function, open the filling tap on the appliance and restore the correct pressure.
The combustion of this appliance has been factory controlled, calibrated and set for operation with NATURAL GAS.
For the first few ignitions immediately after installation the system must implement a self-learning procedure to reach the
correct ignition level.
12.2 SYSTEM GAS EXTRACTION FUNCTION
This function is used to facilitate the elimination of the air inside the heating circuit when the boiler is first installed or after mainte
-
nance when the water is drained from the primary circuit.
To enable the system gas extraction function press buttons
together for 6 seconds. When the function is active,
On
appears
on the display for a few seconds, followed by programme row
312
.
The electronic board will activate a pump on/off cycle lasting 10 minutes. The function will automatically stop at the end of the
cycle. To manually exit this function, press the above buttons together for 6 seconds once again.
12.3 CHIMNEY SWEEPER
This function enables the boiler to generate
maximum heating power
. After activation, the boiler power % can be adjusted from
minimum to maximum in the DHW mode. The following procedure is used.
•
Press buttons
and
together for at least 6 seconds. When the function is enabled, the displays shows “
On
” for a few
seconds followed by programme row “
303
” alternated with the % of boiler power.
•
Press
to gradually adjust power (sensitivity 1%).
•
To exit press both buttons together for at least 6 seconds, as described in point one.
Press
to display the instantaneous flow temperature for 15 seconds.
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