D-EIMWC01206-15EN - 12/20
Pre-charging the refrigerant when the unit is not
running
Pre-charge the equipment with the quantity of
refrigerant anticipated using the Flare SAE 1/4" stop
valve on the filter of the liquid.
CAUTION: To avoid damage to the compressor, do not
start it to speed up the pre-charge.
Once the pre-charge has been completed, ask your
manufacturer representative to perform the first start-
up.
Adjustment of the refrigerant charge with the unit
running.
CAUTION: Only for the personnel authorized to
perform the first start up.
To adjust the charge of the refrigerant, use the 1/4"
Flare SAW valve on the pipe of the liquid and make
sure to load the refrigerant in its liquid state.
To adjust the charge of the refrigerant, the compressor
must be operating at full load (100%).
Verify:
The overheating which must be between 3 and 8
°Kelvin
The sub-cooling which must be between 4 and 8
°Kelvin
The inspection glass of the oil. The level must be within
the glass.
The see-through window of the pipe of the liquid which
must be full and not show humidity in the refrigerant. If
the see-through window of the pipe of the liquid is not
full, gradually add refrigerant and wait for the operation
of the unit to stabilize.
Add refrigerant until all the verification parameters are
within the limits.
The unit must have time to stabilize, which means that
the charge must be done gradually and steadily.
Note the overheating and sub-cooling values for future
reference.
CAUTION: Note on the specific label the total charge of
refrigerant put into the circuit.
NOTE -
Pay attention to a possible contamination of the
remote condenser to avoid blocking the system.
The manufacturer cannot check the contamination of
the "outside" condenser of the installer. The unit has a
precise level of contamination.
In accordance with the Directive 2006/42/EC
APPENDIX II B the units, named EWLQ090
→
EWLQ720
are defined as “quasi-machines”.
The aforementioned products cannot be put into
operation until the final machine in which it must be
incorporate meet the legal standards.
Service and limited warranty
All the units are tested at the factory and guaranteed for
a specific period of time.
These units have been developed and constructed
according to high quality standards ensuring years of
failure-free operation. However, it is important to ensure
proper and periodical maintenance in accordance with
all the procedures listed in this manual and with good
practice of machines maintenance.
We strongly recommend stipulating a maintenance
contract with a service authorized by the manufacturer.
The experience and skill of the personnel, in fact, can
ensure an efficient operation without problems over
time.
The unit must be covered by a suitable maintenance
program from the time it is installed and not just from
the start-up date.
Keep in mind that operating the unit in an inappropriate
manner, beyond its operating limits or not performing
proper maintenance according to this manual will void
the warranty.
Observe the following points in particular, in order to
conform to warranty limits:
1. The unit cannot function beyond the specified
limits
2. The electrical power supply must be within the
voltage limits and without voltage harmonics or
sudden changes.
3. The three-phase power supply voltage must not
have an imbalance between the phases greater
than 2% in accordance with EN 60204-1:2006
(Chapter 4-Par.4.3.2).
4. In case of electrical problems, the unit must
remain
5. off until the problem has been solved.
6. Do not disable or cancel the safety devices,
7. whether mechanical, electrical or electronic.
8. The water used for filling the water circuit must
be clean and suitably treated. A mechanical filter
must be installed at the point closest to the
evaporator inlet.
9. Unless specifically agreed at the time of the
order, the flow of water of the evaporator must
never exceed 120% or be below 80% of the
nominal capacity and in any case within the
limits provided in this manual.
Periodic obligatory checks and starting up ofthe
Groups (units)
These Groups (units) are included in category III of the
classification established by the European Directive
PED 97/23/EC.
For Groups belonging to this category,some national
laws require a periodic check by an authorized
organization. Please verify and contact these
organizations to also request authorization to start it up.
