Ii.11.1 Ordinary Maintenance; Ii.11.2 Special Maintenance; Instructions For Dismantling The Unit And Disposing Of Hazardous Substances - RHOSS MICROSYSTEM TCAEY Série Mode D'emploi

II.11.1 ORDINARY MAINTENANCE

II.11.1.1 Refrigerant circuit
• Refrigerant fluid charge control
After having inserted (with the unit switched off) a manometer on the
pressure socket on the outlet side and one on the pressure socket on
the inlet side, start up the unit and check the relative pressures once
they have stabilized.
• Checking for the absence of refrigerant fluid leaks
With the unit off, check the refrigerant circuit with a suitable leak
detector.
• Checking the condition of the air-side heat-exchanger
With the unit off, inspect the air-side heat-exchanger, and, depending
on its condition, proceed as follows:
• remove any foreign bodies from the finned surface which may
obstruct the air flow;
• clean off the dust deposit, if possible by vacuuming it;
• wash and brush, gently, with water;
• air dry.
II.11.1.2 Water circuit
• Checking the water differential pressure switch
With the unit running normally, slowly close the isolating valve on the
unit water inlet pipe. If, during a test phase, the point is reached where
the isolating valve is completely closed without the differential pressure
valve cutting in, stop the unit immediately by pressing ON/OFF on the
control panel and replace the component.
• Bleeding air from the chilled water system.
Work on the bleed valve placed inside the unit. The valve can be
accessed manually by removing the protection cap on the right-hand
side of the unit (Fig. 19). Channel the water out of the machine using
the specific silicon pipe.
• Draining the water system
With the unit switched off, storage tank versions (T/H) can be drained
using the storage tank drainage hose (ref. 7, Fig. 17 and 18) and the
valves located inside the unit. Versions without a storage tank (P/L) can
be drained using the valves located inside the unit. In order to avoid
accessing the machine, it is advisable to install taps for emptying the
system.
ENVIRONMENTAL PROTECTION!
If the system has an antifreeze additive, it must not
be drained freely, because it causes pollution. It
should be collected for possible recycling.
II.11.1.3 Electric circuit
The following checks are recommended on the electrical circuit:
• check the unit power consumption using a clip-on meter and
compare the reading with the values shown in the technical data table;
• with the unit switched off and disconnected from the power supply,
check and inspect electrical contacts and terminals for tightness.
Fig. 19
34
SECTION II: INSTALLATION AND MAINTENANCE

II.11.2 SPECIAL MAINTENANCE

II.11.2.1 Component replacement instructions
Before replacing components, drain the refrigerant from both the high
and low-pressure sides. This is because, if the coolant is only drained
from the high pressure side, the compressor springs may close
together, thereby preventing the pressure from equalising. In this way,
the low pressure part of the casing and the inlet line could remain
pressurised. In this case, if you apply a brazing torch to one of the low-
pressure components of the system, the pressurised mixture of
refrigerant and oil could blow out of the circuit and ignite on contact with
the brazing torch. To avoid this hazard, make sure that both the high
and low pressure sides of the circuit have been effective drained before
applying brazing torches.
II.11.2.2 Refilling with refrigerant
Rapidly filling with refrigerant on the inlet side of a single-phase system
may prevent the compressor from starting or cause a breakage. The
best way to avoid this situation is to charge both sides, high and low
pressure, simultaneously.
Topping up units with R410A refrigerant (R32/R125) must be carried
out in the liquid phase, piping it from a cylinder so as not to alter its
composition.
II.12 INSTRUCTIONS FOR DISMANTLING THE UNIT
AND DISPOSING OF HAZARDOUS
SUBSTANCES
ENVIRONMENTAL PROTECTION!
RHOSS has always been aware of the importance
of protecting the environment.
When the unit is dismantled, it is important to
adhere scrupulously to the following procedures.
The unit should only be dismantled by a firm authorized for the disposal
of scrap machinery/products.
The unit as a whole is composed of materials which can be treated as
SRM (secondary raw materials) and the following conditions must be
observed:
• the compressor oil must be removed, recovered and delivered to a
body authorized to collect waste oil;
• if the appliance contains antifreeze, this should not just be disposed
of freely, as it causes pollution. It should be collected for possible
recycling;
• refrigerant fluid should not be discharged into the atmosphere. It
should instead be recovered by means of homologated devices, stored
in suitable cylinders and delivered to a company authorised for the
collection;
• the filter-drier and electronic components (electrolytic condensers)
are considered special waste, and must be delivered to a body
authorized to collect such items;
• the foamed polyurethane rubber and foamed polyethylene mesh
pipe insulation, the foamed polyurethane (which surrounds the storage
tank), the shrink-wrap, the polystyrene packaging and the sound-
absorbent sponge lining on the bodywork must be removed and
processed as urban refuse.
This symbol means that this product must not be disposed of
with household waste. Properly dispose of the unit according to local
laws and regulations. When the unit reaches the end of its useful life,
contact the local authorities for information on disposal and recycling, or
ask Rhoss S.p.A. to collect the used equipment free of charge.
Separate collection and recycling of the product at the time of disposal
will help conserve natural resources and ensure that the unit is
recycled properly to safeguard human health and the environment.
Inside the electronic device there are lithium batteries. Dispose in
compliance with the national or local legislation in force in your
country.