Publicidad
Idiomas disponibles
Idiomas disponibles
II.10 INSTRUCTIONS FOR MAINTENANCE
DANGER!
Maintenance operations, even if for inspection
purposes only, must be carried out by skilled
technicians, qualified to work on air conditioning
and refrigeration products. Use suitable personal
protective equipment (gloves, goggles, etc).
DANGER!
Do not introduce pointed objects through the air
flow and intake grilles.
DANGER!
Always use the mains switch to isolate the unit
from the mains before carrying out any
maintenance work on the unit, even if it is for
inspection purposes only. Make sure that no one
supplies power to the machine accidentally; lock
the master switch in zero position.
DANGER!
In the event cooling or fan circuit component fail or
the refrigerant fluid charge drops, the upper part of
the compressor casing and the discharge line may
reach temperatures close to 180°C for brief periods
of time.
II.10.1 ROUTINE MAINTENANCE
II.10.1.1 Refrigerant circuit
Refrigerant charge check
With the unit off, fit a pressure gauge on the test point on the outlet side
and another on the test point on the inlet side. Start up the unit and
check both pressure readings once they have stabilised.
Check for the absence of refrigerant fluid leaks
With the unit off, check the refrigerant circuit with a suitable leak
detector.
Check that the air side heat exchanger is clean.
With the unit off, observe the air side heat exchanger and, as needed:
remove any foreign bodies from the finned surface which may
obstruct air flow;
remove built-up dust possibly vacuuming it;
wash and brush, gently, with water and gentle brushing;
let it air dry;
keep condensation drain pipes free from any obstructions.
II.10.1.2 Hydraulic circuit
Check the operation of the water differential pressure switch
With the unit running normally, slowly close the shut-off valve on the
unit water inlet pipe. If, during a test phase, the shut-off valve is
completely closed without the differential pressure valve triggering, stop
the unit immediately by pressing ON/OFF on the control panel and
replace the component.
Bleeding air from the chilled water system
Use the bleed valve located inside the unit near the water outlet pipe
and, in the T versions, also on the pump compartment. Channel the
water out of the machine with the specific silicone tubes.
Draining the water system
In the T units, with the unit switched off, the system can be drained via
the cock located at the bottom of the storage tank and from the cap on
the pump. In the units without storage and with the unit switched off, the
system can be drained from the cock located under the water outlet
pipe from the exchanger
SAFEGUARD THE ENVIRONMENT!
If the system has an antifreeze additive, it must not
be drained freely, because it causes pollution. It
should be collected for possible recycling.
SECTION II : INSTALLATION AND MAINTENANCE
II.10.1.3 Electrical 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 disconnected from the power supply, check and inspect
electrical contacts and terminals for tightness.
II.10.2 SPECIAL MAINTENANCE
II.10.2.1 Component replacement instructions
If a unit requires repair, switch it off and 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 and that resulting from triggering
of the safety valve, make sure that both the high and low pressure sides
of the circuit have actually been drained before applying brazing
torches.
II.10.2.2 Restoring the refrigerant load
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 fill both high and low pressure sides
simultaneously.
Topping up units with R410A refrigerant must be carried out in the liquid
phase, piping it from a cylinder so as not to alter its composition.
II.11 INSTRUCTIONS TO DISMANTLE THE UNIT AND
DISPOSE OF HAZARDOUS SUBSTANCES
SAFEGUARD THE ENVIRONMENT!
RHOSS has always cared about protecting the
environment.
When the unit is dismantled it is important to
adhere scrupulously to the following procedures.
The unit must only be dismantled by a firm authorised for the disposal
of scrap machinery/products.
The unit as a whole is composed of materials considered as secondary
raw materials and the following conditions must be complied with:
the compressor oil must be removed, recovered and delivered to a
facility 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 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.
30
Publicidad
