Immergas MAGIS COMBO 4 V2 Instructions And Recommendations page 85

3.30 GENERATOR MANAGEMENT
Central heating mode
Following a request in room heating mode, the electronic system
decides, depending on the external temperature and set point
configured, whether to activate heat pump mode, or (with "free-
zing" external temperatures) the heat generator (Fig. 64).
The management electronics select which heat source to be used
according to the combination of "I" family parameters. The heat
generator could also switch on also when external conditions are
favourable; this can take place after a time proportional to the pa-
rameter.
Alternatively, you can also set a fixed switching outdoor tempera-
ture (manual mode in the parameter "I 05" setting the temperatu-
re with "I 06"). The D.H.W. demand is met by the heat generator,
even simultaneously with a system demand which is met by the
heat pump mode.
To protect the appliance the heat pump might start up
even if the appliance is in the heat generator exclusive
operating zone.
Operation in central heating mode
Y
Max
65 °C
Min
-15
Key (Fig. 64):
X - Outside temperature
Y - Central heating setting
A - Exclusive heat generator operation
B - Heat pump operation (if after activation time the set tempe-
rature is not reached the heat generator starts)*
C - Heat pump operation (if after activation time multiplied by 2
the set temperature is not reached the heat generator star-
ts)*
A
Te1
B
Te2
The Te1 and Te2 values are determined by the logic of the product
board (Setting manual mode "I 05" = "MA" the value of "Te1" is the
same as "I 06" and the value of "Te2" is the same as "I 06" + 5 °C).
* = The heat pump will then restart, thereby creating an alterna-
ting mechanism between the two generators.
C
X
25
64
85