Immergas Victrix Pro 80 2ErP - 3.23 Functioning with common flow probe.; 3.24 Autodetection.; 3.25 Simple cascade (max. 2 boilers)

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INSTALLERUSER
MAINTENANCE TECHNICIAN
3.23 FUNCTIONING WITH COMMON FLOW PROBE.
With a hydraulic circuit breaker, there must be a common ow
probe (with boiler ow probe functions) and a pump to be con-
nected downstream of the plant.
e probe must be connected to terminals “S1” and “S2” and
parameter “P38” must be set up, whereas the pump must be con-
nected to terminals “C” and “D”.
If there is a DHW circuit, it can be connected via an external 3-way
to be connected to “IT”, “IS” and IK terminal, or use a suitable
pump to be connected to “IT” and “IK” terminals. e DHW
circuit has priority over the heating circuit.
Please refer to chart g. 51 for the correct conguration
3.24 AUTODETECTION.
is function enables the association of the display board to the
boiler’s P.C.B. In addition, in case of “simple cascade” installation,
it enables the detection and combination of cascade boilers.
Turn the boiler on, programme it according to your needs, press
and hold the “-” (g. 29 ref. 2) button down until “AUTO” appears,
then press “RESET” until “bu 1” appears.
3.25 SIMPLE CASCADE MAX. 2 BOILERS
It is possible to create a “simple cascade” by directly connecting
two boilers.
e two boilers turn on alternatively based on the plant’s require-
ments.
Carry out the connection as indicated in the diagram (g. 43).
With this conguration, there must be a common ow probe on
the thermal plant, see the chart (g. 51) for the possible options.
In order for the system to recognise the two boilers, you must
activate the Autodetection on the Master boiler and make sure
both boilers are on..
ey are associated when “bu 2” appears on the Master boiler and
“SLA 2” appears on the Slave boiler.
From this moment on, all programming is carried out on the
Master boiler, while the “SLA 2” caption always appears on the
Slave boiler, except in case of anomaly.
e customised parameters of the Master boiler are automatically
replicated on the Slave boiler.
It is not possible to combine the cascade and zone
regulator to the plant in this case. It is possible to
connect an On/O room thermostat or use the 0 ÷ 10
V inlet (which must only be connected to the Master)
to control the plant.
N°
boilers
Parameter “P38” Parameter “P17 *”
Common ow
probe
Boiler ow probe
Common ow
probe present = 1
Common ow
probe absent = 0
DHW pump (down-
stream the distribu-
tion manifold) = 1
3-way valve = 0
1 X X No
Central heating
Domestic hot water
1 X X Central heating Domestic hot water
1 X X
Central heating
Domestic hot water
Just as
limit thermostat
2 X Not admitted Central heating
Just as
limit thermostat
2 X X
Central heating
Domestic hot water
Just as
limit thermostat
*NOTE: valve 3 is supplied only for 15 seconds