23
3�12�2 Hydraulic plant
-
-
es in the refrigeration circuits and to guarantee the correct
level of comfort.
3�12�3 Plant water content and minimum
owrate
Water content
A minimum volume of water in the primary circuit of the
plant must be guaranteed for the correct operation of the
appliance.
The minimum volume is necessary to prevent risks of
ice formation during defrosting operations or continu-
ous modulation of the compressor frequency.
It also allows the following advantages:
• less wear and tear on the appliance
• increased system performance
• improved temperature stability and accuracy
The minimum volume is indicated in the table below:
If the minimum volume is not reached, a suitably sized
storage tank must be provided.
The minimum volume must be guaranteed in all oper-
ating modes and under all conditions.
Models m.u.
5 7 9 12 15
Minimum system water
content
L 20 30 40 50 65
Minimumowrate
-
pliance.
-
ing modes and under all conditions, if necessary by adding
a by-pass valve.
A hydraulic separator must be provided if the plant re-
quires a higher head than that available from the pump of
the unit.
Models m.u.
5 7 9 12 15
Minimum wa-
ter ow rate
L/
min
11,2 14,3 16,2 23,2 29,3
3�12�4 Position and dimensions
A Standard units
B Unit with integrated inertial tank 20 L (cod. GB1016)
MC
RC Boiler return
AC Domestic hot water
AF Domestic hot water supply
MR Second circuit supply from storage tank
RR Second circuit return from storage tank
RS Solar return
MP Plant delivery
RP System return
MC
RC
AC
AF
MR
RR
RPMP
MS
RS
MS
RS
A
MS
RS
AC
AF
MR
RR
RP
MP
MS
RS
B
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