User Manual
Set-up for operation Water cooled systems
M
20.1
REV.2-04/15
12/06/03 M20-R-HO2-GB
Remove the tap and pour the liquid coolant into the
radiator; the quantity and composition of the liquid
coolant are indicated in the motor operating manual.
Replace the tap, ensuring it is perfectly closed.
After relling operations, allow the motor to run for
a brief time and check the level, as it may have di-
minished due to air bubbles present in the cooling
circuit; restore the level with water.
To replace the liquid coolant, follow the operations
described in the motor operating manual.
:
The engine cooling system is originally lled with
coolant type:
During the engine life it is strongly recommended
to use the same coolant type. This is because a
coolant change would require a careful cleaning of
the cooling system, which is not an easy job. A lack
in tacking these precautions would result in the mix
of different additives used in different coolants which
would originate gelatinous substances capable of
obstructing the cooling system.
Do not remove the radiator tap with the motor in
operation or still hot, as the liquid coolant may
spurt out and cause serious burns. Remove the
tap very carefully.
A qualied electrician should carry out electrical con-
nections according to the norms in force.
!
The electrical connection to the User system is a very
important operation: safety and good operation of the
genset and User system depend on a correct electrical
connection.
Before supplying User system always check:
• that wires connecting gen-set to the user plant are
suitable to the supplied voltage and are in accordan-
ce to the applicable rules;
• wire type, section and length have been calculated
considering environment conditions and in force
norms;
• ground is functioning correctly: earth fault relay devi-
ce works only if this connection is operating;
• that direction of the phases corresponds to the user
plant phase rotation, and none of the phases has
been accidentally connected to neutral.
The grounding connection to an earthed installation
for all models equipped with a diffe-
rential switch (circuit breaker). In these groups the
generator star point is generally connected to the
machine’s earthing; by employing the TN or TT di-
stribution system, the differential switch guarantees
protection against indirect contacts.
In the case of powering complex installations re-
quiring or employing additional electrical protection
devices, the coordination between the protection
devices must be veried.
For the grounding connection, use the terminal (12);
comply to local and/or current regulations in force
for electrical installations and safety.