Immergas MINI NIKE 3 E - Page 25

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STMiN3E ed 09/11 MINI NIKE 3 E
Technical Documentation
Technical Documentation
Following this the burner comes down to the minimum set
value ("Minimum CH output" parameter), to then reach, if
necessary, the maximum set value ("Maximum CH output"
parameter), in a dened amount of time, "CH ramp with
timer" parameter.
Successively, ame modulation takes place with reference to the
dierence between the temperature set on the boiler control
panel and that detected by the DHW probe (B1).
On exceeding (+5°C) the temperature set, the burner is
switched o. e re-ignition time depends of the setting of
the "CH ignition timer" parameter.
Every time the burner switches o the pump functions for
another 60 seconds.
Operation with Remote Control
In the case of connection to the CAR
V2
or CAR Universal
remote control, the boiler automatically detects the display
and the ( ) symbol.
If the conditions detected by the Remote Control require
ignition in CH mode (EST/INV selector of the Remote Control
in WINTER position, CH temperature adjustment higher than
that detected by the central heating ow probe (B1), request
from the time programmer, room temperature adjustment higher
than that detected), the integrated P.C.B. manages the burner
ignition cycle, as described previously.
N.B.: by pressing the general button ( ) for 8 seconds
and setting the boiler to OFF, on CAR
V2
the "ERR>CM"
connection error symbol will appear and the "CON" symbol
will appear on CAR Universal. e Remote Control is powered
constantly so as not to loose the memorised programs.
DHW request
Once the domestic water ow switch has been closed (S4),
if the system pressure switch contact (S5) is closed (pressure
detected in the primary circuit higher than minimum value),the
integrated P.C.B. powers the pump (M1) and the motor (M)
of the 3-way valve (M30). is functions until the end run
switch "2" opens once the DHW position has been reached.
e burner ignition takes place in the same way as the CH
mode.
When the ame has been detected, the modulation coil signal
is increased in a way to immediately reach (if requested) the
maximum output adjusted on the gas valve.
Successively, ame modulation takes place with reference to
the dierence between the temperature set using the DHW
temperature selector switch and the temperature detected by
the DHW probe (B2).
Once the set value has been exceeded (+5°C) the burner shuts
o, and turns back on again once the temperature goes down
again (+4°C) (factory setting with correlated DHW set-point).
By acting on the "DHW ermostat" it is possible to set the
boiler so that, once the set value has been exceeded, the burner
continues operating at the minimum output and will turn o
only when the DHW probe (B2) reads a temperature above
65°C (xed DHW set-point).
If during operation the CH flow probe (B1) reads a
temperature above 80°C, it will be modulated by referring to
the ow temperature with xed set-point of 80°C.
DHW request for boilers with storage tank
(optional if a "External Storage tank unit coupling Kit is
installed).
If the temperature detected by the DHW NTC probe (B2)
positioned on the storage tank unit drops below the value
dened with the "DHW thermostat" parameter with respect
to the set DHW temperature, the boiler starts an ignition
cycle in DHW mode.
If the system pressure switch contact (S5) is closed (pressure
detected in the primary circuit higher than minimum value),the
integrated P.C.B. powers the pump (M1) and the motor (M)
of the 3-way valve (M30). is functions until the end run
switch "2" opens when the DHW position is reached.
e burner ignition takes place in the same way as in the CH
mode.
When the ame has been detected, the modulation coil signal
is increased to immediately reach (if requested) the maximum
output set on the gas valve or that necessary to reach the set
temperature.
Successively, ame modulation takes place with reference to
the dierence between the temperature set using the DHW
temperature selector switch and the temperature detected by
the DHW probe (B2).
When the temperature measured by the DHW probe (B2)
exceeds the value requested, the burner is switched o.
Each time the burner turns o, the pump performs a post-
circulation of 60 seconds.
If, during functioning, the CH ow probe (B1) measures a
temperature higher than 90°C, the burner is switched o. A
new ignition cycle can start only if the temperature drops to
75°C.
When the temperature detected by the DHW contained
in the storage tank falls below below the value dened with
the "DHW thermostat" parameter with respect to the set
temperature, the P.C.B. starts a new ignition cycle.
Central heating anti-freeze request
When the temperature detected by the CH ow probe (B1)
falls below 4°C, the P.C.B. gives consent for ignition and keeps
the generator working with the burner at minimum output
until a boiler temperature equal to 42°C is reached (radiators
anti-freeze).
DHW anti-freeze request
If the temperature detected by the DHW probe (B2) falls below
4°C, the P.C.B. gives consent for boiler ignition and keeps the
generator working with the burner at minimum output until a
temperature of 6°C is reached. Post-circulation is then activated
in the central heating mode with duration of 150 seconds.
During functioning, the water in the primary circuit remains
below 42 °C as on reaching this temperature the P.C.B. switches
the burner o.
If the DHW anti-freeze is activated in concomitance with a
central heating request, the DHW anti-freeze is served for
2 minutes and the central heating request for 6.5 minutes
(continuously).