Rivacold STH009 Manual De Uso Y Mantenimiento página 57

ATTENTION:
6.3.1 Servicing and routine maintenance
The most significant and important actions relating to the routine maintenance can be summarized as follows:
Weekly; check the cleanliness of the evaporator, in particular that there is no ice build up. In case of ice build up perform a
manual defrosting by pressed the button "UP" for more than 5 seconds. Repeat this procedure until the evaporator is free of
ice. Check after 12 hours.
Regularly; clean (at least every month) the condenser by removing dust and grease. If the environment where the machine is
installed is very dusty, more frequent cleaning will be required.
Clean every four months the contacts, both fixed and movable, of all the contacts, replacing them if necessary.
Check (every four months) the tension of all the electrical terminals placed inside both the panels and the terminal boards of
each user; carefully check also the tension of the fuses.
Visually inspect the entire cooling system, even inside the, for leakage of the refrigerant, also identifiable by oil traces.
Rectify quickly and if in doubt investigate thoroughly. Check for refrigerant gas leaks:
for systems with 3 kg ≤ of refrigerant load < 30 kg, the check must be carried out yearly;
for systems with 30 kg ≤ of refrigerant load < 300 kg, the check must be carried out every six months;
for systems with refrigerant load ≥ 300 kg, the check must be carried out every three months.
For leakages requiring a refrigerant addition greater that the 10% of the total gas loaded, the repair must be carried out
within 30 days from the date of detection.
Check every four months the regular flow of the refrigerant by the gauge located on the liquid line.
Check every four months the oil level by the suitable gauge (if present) located on the crankcase of the compressor.
Carefully inspect, every four months, by the gauge located on the liquid line, the colour of the element sensitive to moisture.
Green indicates dry, yellow indicates moisture. In case of moisture immediately stop the machine and replace the liquid
filter, also replace the refrigerant and oil. Repeat the check after 3 working days.
Check every four months the noise level of the compressor. This operation must be carefully carried out as it requires the
machine to be running; check for a ticking sound or vibrations that could indicate problems or excessive mechanical
clearances between the moving parts.
Check regularly that the condensation water drain is not blocked. For MBP and LBP models check the water drain heater is
working efficiently.
ATTENTION:
6.3.2 Interventions on safety valve (where planned)
We recommend you replace the safety valve in case it needed to intervene; during drainage, in fact, the accumulation on the seal
of the valve of processing residue from components and tubing can cause the seal to become faulty.
DANGER:
DANGER:
ATTENTION:
We recommend you check the safety valve every three years.
6.4. Out of service, dismantling and demolition
To perform these dismantling and demolition operations, the following Individual Protection Devices are necessary:
6.4.1 Machine placed out of service
To place a machine out of service for a long period, follow the operations below:
1. Remove machine voltage.
2. Clean the machine.
3. Also conduct the maintenance operations and then cover the machine with a sheet.
6.4.2 Dismantling
If it is necessary to dismantle the machine, follow the procedures indicated below.
Any measures taken to braze on a product category risk PED ≥ 1, must be conducted by qualified
professionals.
on completion of each maintenance and cleaning operation, reset all the fastened protections.
before replacing the valve, check the system, in the zone in which it is operating, is not under pressure
or at a high temperature.
do not dismantle the safety valve without recovering the gas in advance that is present in the liquid
receiver.
maintenance is not planned for safety valves. Removal of the cap and tampering with the seal are
considered unauthorised modifications to calibration; this means the manufacturer's warranty is not
valid. The inspection of safety valves is reserved for the proposed authorities and is governed by
specific legal norms, in force in the country of installation.
UK
ST-SP Pag. 57 Rev 00 02/10