Immergas HERCULES SOLAR 26 1A Manual page 12

Technical Documentation
GIM Multifunction Integrated Unit
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Before replacing the various components present on the GIM
unit, the water present inside the primary circuit must be
drained by opening the system draining valve positioned on
the storage tank return connection pipe.
Before draining, ensure that the system filling valve is closed.
Three-way valve cartridge replacement (1).
To replace the 3-way cartridge (1) slide the locking clip out (2)
and extract the small electric motor (3) and then unscrew the
screw fasteners (4) that fix the cartridge (1) to the composite
body (6).
N.B.: when re-mounting the cartridge, pay particular attention
to correctly insert the two small sheet steel reinforcement
plates (5).
Pump motor replacement (7).
To replace the pump body, remove the 4 screws (8) that fix the
motor (7) to the composite body (6).
Replacement of the automatic air vent valve (9).
To replace the air vent valve, the relative locking clip must be
removed and the valve extracted (9) paying attention not to
damage the relative O-ring.
N.B.: when re-mounting the air vent valve, pay particular
attention to insert the relative O-ring correctly.
STHSC ed 0710
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Technical Documentation
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System pressure switch replacement (10).
To replace the system pressure switch (10), slide the relevant
locking clips out.
N.B.: when re-mounting the system pressure switch, pay
particular attention to insert the relative O-ring correctly.
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HERCULES Solar 26 1A