28
WSAN-YES 18.2-35.2
M0ST10N19-00
General
The indicated operations should be done by qualified
technician with specific training on the product.
the electrical, water connections and the other
system works are by the installer.
Su richiesta i centri assistenza effettuano la messa
in funzione.
Agree upon in advance the star-up data with the
service centre.
For details, refer to the various chapters in the
manual.
Before checking, please verify the following:
the unit should be installed properly and in
conformity with this manual
the electrical power supply line should be
sectioned at the beginning.
The line sectionalizing device is open, locked
and equipped with the suitable warning
make sure no tension is present
After turning off the power, wait at least 10
minutes before accessing to the electrical panel or
any other electrical component.
Before accessing check with a multimeter that there
are no residual stresses.
Preliminary checks
Unit power supply OFF
safety access
functional spaces
air flow: correct return and supply (no bypass,
no stratification)
structure integrity
fans run freely
unit on vibration isolators
filtro acqua ingresso unità + valvole
intercettazione per pulizia
anti-vibration mounts on water connections
expansion tank (recommended volume = 10%
system content)
minimum system water content
system washed
system charged + any glycol solution +
corrosion inhibitor
system under pressure
vented system
refrigeration circuit visual check
earth connection
power supply features
Electrical connections by the customer
Start-up sequence
Unit power supply ON
compressor casing electric heaters in operation
for at least 8 hours
vacuum voltage measurement
phases sequence control
pump manual start-up and flow-rate check
refrigeration circuit shut-off valves opening (if
applicable)
Unit ON
load voltage and inputs measurement
liquid warning light check (no bubbles)
operation check of all fans
supply and return water temperature
measurement
subcooling and overheating measurement
check there are no abnormal vibrations
set-point customisation
climatic curves customisation
scheduling customisation
complete and available machine documentation
Refrigerant circuit
Check carefully the refrigerating circuit: the
presence of oil stains can mean leakage caused
by transportation, movements or other).
Verify that the refrigerating circuit is in pressure:
Using the unit manometers , if present, or
service manometers.
Make sure that all the service outlets are closed
with proper caps; if caps are not present a leak
of refrigerant can be possible.
Open all of the refrigeration circuit shut-off
valves (if applicable).
Water circuit
Before realizing the unit connection make sure
that t he hydraulic system has been cleaned
up and the clearing water has been drained
Check that the water circuit has been filled and
pressurized
Check that the shut-off valves in the circuit are
in the "OPEN" position.
Check that there isn’t air in the circuit, if
required, evacuate it using the air bleed valve
placed in the system high points.
When using antifreeze solutions, make sure the
glycol percentage is suitable for the type of use
envisaged. → tabella pag. seguente
Neglecting the washing will lead to several filter
cleaning interventions and at worst cases can cause
damages to the exchangers and the other parts.
7 START-UP
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General