Rivacold FS Serie Manual De Uso Y Mantenimiento página 49

UK
DANGER:
LEAKAGE CHECK
A system can operate regularly over time, for the entire life of the compressor, only if all of the requirements for correct installation are
observed, including having no refrigerant leaks. It is estimated that refrigerant leaks equal to 10% of the total charge during 15 years
of compressor operation, still ensure good operation of the refrigerant system. With the new gases (R124a; R404A and mixtures), the
possibility of refrigerant leaks through the welds and incorrectly performed connections increase the reduced molecular dimension of
the gas; for this reason it is important that the welds are checked for leaks using the appropriate methods and equipment for the type
of gas used.
CRANKCASE HEATER (OPTIONAL)
Whenever the compressor operates at a temperature less than +5°C, a crankcase heater is recommended in order to avoid the build-
up of liquid in the lower part of the compressor during stoppages. It is also necessary to choke the condenser, for example, by
reducing its air capacity (ie. by means of a speed regulator).
WORK CYCLE
The systems must be sized in order to not exceed 5 on/off cycles per hour. When the Thermal/Amperometric protection is triggered,
the compressor is shut down and will be restarted after the time needed to reset the contacts on the protector.
OPERATION TIMES
Systems must be sized for normal operation 80% of the time. 100% operation of the compressor can occur only in harmful load and
environmental temperature characteristics, outside of the allowable limits.
PRESSURE SWITCHES
All machines are equipped with HBP safety pressure switches calibrated at a max. of 28 bars. LBP safety pressure switches are
calibrated according to the gas used and the application of the compressor. The values in the following table are recommended:
LBP Application MPB
LBP Application LBP
The risk category for each machine is indicated on the machine's identification tag.
SAFETY VALVES ON THE LIQUID RECEIVER
Machines in risk category 0 are not equipped with safety valves
Machines in risk categories ≥1, are equipped with safety valves.
The risk category for each machine is indicated on the machine's identification tag.
4.3.2. Connection to the electrical supply line
The electrical power supply (also in terms of voltage and frequency) supplied by the Purchaser must be sufficient to correctly supply
power to the machine. To be specific, it is necessary to adopt the following indications:
The power cable must be stretched (avoid coiling and overlaps) in a location where it is not exposed to any shocks or handling
by minors. It must not be near liquids, water or heat sources and must not be damaged (if damage occurs, have it changed by
qualified personnel).
Prepare a differential thermomagnetic switch between the power supply line and the machine that is of adequate size for the
application and the current laws in the country where installed and make sure that the line voltage corresponds with the voltage
indicated on the tag (see the label applied to the machine); allowed tolerance ± 10% of the rated voltage.
ATTENTION:
The power supply cable section must be adequate for the power absorbed by the machine.
ATTENTION:
Attach the provided micro-door on the cell door batten which will cause the cell light to automatically turn on whenever opened
along with turning off the compressor and the fans on both the evaporator and the condenser.
ATTENTION:
Attach the lamp to the cell ceiling and connect the cell light cable according to the instructions given inside the support.
Units in the LBP series (-15°C/-25°C) come equipped with a cable for connecting the door heater. This connection must be
performed using a fuse with the proper size for the door heater used.
ATTENZIONE:
4.4. Storage
If necessary to store the machine for a period before installation (or following de-installation), we recommend you protect it
adequately and store it in a suitable environment, with the following features:
For the loading, recovery, and control of the refrigerant, use gloves that protect against low
temperatures.
Gas
R404A -25 °C=1.5 bars
R404A -40 °C=0 bars
the differential thermomagnetic switch must be placed in the immediate vicinity of the unit, in order
for it to be well visible and accessible by the technician, in the event of maintenance.
The law requires that the condensing unit is connected to an efficient earthing system. Any
responsibility for the failure to comply with this provision is denied; any responsibility is denied in
the event that the electrical system to which the machine is connected is not built according to
current regulations.
the micro-door cable and cable from the remote panel, if present, must be kept far from the
electrical cables in order to avoid signal disturbances.
do not connect the CELL LIGHT and DOOR HEATER to the 230 Volt line. The tag attached to each
cable indicates the connection to be performed.
°C=[bar] Set
3 bars
3 bars
Differential
1.5 bars
3 bars
FS Pag. 49 Rev 00 02/11