Maintenance And Cleaning; Disposal; Optional Items - Rivacold Mx Betriebs- Und Wartungsanleitung

The inspection of the pressure relief valves is reserved to specific Bodies in charge and is regulated by
the current laws of the country of installation.
8. 3 Expected lifetime
A control of the pressure relief valve is suggested every 5 years.
UK
9.

MAINTENANCE AND CLEANING

Maintenance and cleaning must be carried out by specialist technicians only.
First of all, make sure that the power supply is disconnected.
•
Regularly clean (at least every month) the condenser by removing dust and grease. If the
environment where the unit is located is very dusty, more frequent cleaning may be necessary.
• In the event that machine parts need replacing, they have to be replaced by items exactly the same
to the originals ones
•
Clean the contacts, fixed and mobile, of all contactors; replace them if they show signs of wear.
(every 4 months)
• Check that all electric terminals, both on electrical panels and terminal boards, are properly
connected; also check carefully that the all fuse elements are correctly clamped. (every 4 months)
•
Visually check the entire refrigerating circuit, even inside the machines, for any traces of refrigerant
leaks, which are signalled by traces of lubricant oil. Intervene in due time and check further in case
of doubts. (every 4 months)
•
Check that refrigerant is flowing regularly by means of the indicator on the liquid line. (every 4
months)
•
Check the oil level by means of the special indicator (if fitted) placed on the compressor crankcase.
(every 4 months)
• Carefully check the colour of the element which is sensitive to humidity through the indicator on the
liquid line. Green means dry; yellow means humidity. In the event of humidity, stop the machine
immediately, replace the filter on the liquid line and replace both the refrigerant and the oil. Repeat
this check after 3 days of operation. (every 4 months)
•
Check the noise level of the compressor. This check must be performed with caution, as it has to be
carried out while the system is operating. Check for ticking or vibrations that result from
breakdowns or excessive mechanical friction between moving parts. (every 4 months)
• Important note: At the end of maintenance, replace all previously removed guards (housing and
grid).
•
Do not remove the pressure relief valve without having previously recovered the gas inside the
liquid receiver.
10.

DISPOSAL

If the machine is placed out of service, it is necessary to disconnect it from the mains. The gas contained
inside the system must not be dispersed into the environment. The compressor oil is subjected to
differentiated waste collection regulations; therefore, we recommend that you do not dispose of the unit
as normal iron scrap but that you use a special collection centre, as per the standards and regulations in
force.
11.

OPTIONAL ITEMS

•
Condenser fan speed variator
This controls the condenser fan speed according to condensing pressure so as to keep it within set
values. It is installed in the high-pressure circuit. The instructions for use are issued together with the
technical documents of the machine.
• R22 gas
Alternative gases to the R404A standard and recognisable by the appliance code: E=R22
•
Oil separator
When the distance between the condensing unit and the evaporator is more than 10 m, the fitting of
an oil separator is recommended. This intercepts the oil driven by the compressed gas and it
regularly returns it to the machine crankcase. In this way, the oil separator helps the lubrication of
the moving parts of the compressor. Moreover, by removing or reducing the oil film on the
exchanging surfaces of the condenser and the evaporator it improves the thermal transmission of
MX SX Pag. 18 REV. 14 11/05