Maintenance And Cleaning; Disposal; Optional Items - Rivacold MH Serie Manual De Uso Y Mantenimiento

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
UK
•
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.
Checking leaks of cooling gas:
•
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)
•
• 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.
• Electrical box ( code MH-TH.../12)
The electrical box is fitted inside the housing and it fully controls the machine functioning by
means of an external thermostat ( the relevant wiring diagram is supplied herewith)
• Phase reverse protection
This is used to protect the compressor against any damage caused by the incorrect connection
of the electrical supply phases.
for systems with 3kg ≤ load of cooling gas < 30kg the check must be annual
o
for systems with 30kg ≤ load of cooling gas < 300kg the check must be six-monthly
o
for systems with load of cooling gas ≥ 300kg the check must be three-monthly
o
if a loss is found, it is necessary to intervene immediately and carry out a verification
o
within 30 days to ensure the repair work has been effective.
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)
MH TH Pag. 22 REV. 08 11/07