Equipment And Components Under Pressure; Maintenance Safety Considerations - Carrier AquaForce 30XAV 500 Installation, Operation And Maintenance Instructions

Ensure good ventilation, as accumulation of refrigerant in
an enclosed space can displace oxygen and cause
asphyxiation or explosions.
Inhalation of high concentrations of vapour is harmful and
may cause heart irregularities, unconsciousness, or death.
Vapour is heavier than air and reduces the amount of oxygen
available for breathing. These products cause eye and skin
irritation. Decomposition products are hazardous.

1.2 - Equipment and components under pressure

These products incorporate equipment or components under
pressure, manufactured by Carrier or other manufacturers.
Ensure that you are familiar with the appropriate national
regulations / guidance for the ownership, use and maintenance
of such systems. The characteristics of this equipment/these
components are given on the nameplate or in the required
documentation, supplied with the products.
These units comply with the European Pressure Equipment
Directive.
The units are intended to be stored and operate in an
environment where the ambient temperature must not be less
than the lowest temperature indicated on the nameplate. Do
not introduce high static and dynamic pressure compared with
the existing operating pressures used during operation or for
tests in the refrigerant circuit or in the heat exchange circuits.
NOTES: Monitoring during operation, re-qualification,
retesting, exemption from retesting:
• Follow local regulations on the monitoring of pressure-
containing equipment.
• The user or the operator is usually requested to create
and maintainx a monitoring and maintenance register.
• In absence of regulation or in addition to the
regulations, follow the guidance in EN 378.
• Follow the local professional recommendations,
whenever they exist.
• Regularly monitor the surface of the components to
detect cavernous corrosion. To do this, check an
uninsulated part of the pressure vessel or at a joint in
the insulation.
• Regularly check for possible presence of impurities (e.g.
silicon grains) in the heat exchange fluids. These
impurities can cause wear and/or pitting corrosion.
• Filter the heat exchange fluid.
• The reports of the periodical checks by the user or the
operator must be included in the monitoring and
maintenance register.
REPAIR:
Any repair or modification of a pressurised vessel is
prohibited.
Only the replacement of the vessel by an original part from
the manufacturer is allowed. In this case, the replacement
must be carried out by a qualified operator.
The replacement of the vessel must be entered in the
monitoring and maintenance register.
RECYCLING:
The pressure equipment can be recycled in whole or in part.
After use they may contain refrigerant vapours and oil
residue. Some parts are painted.

1.3 - Maintenance safety considerations

Carrier recommends the following drafting for a logbook
(the table below should not be considered as reference and
does not involve Carrier responsibility):
Intervention Name of the
commissioning
Date Nature
(1)
engineer
(1) Maintenance, repairs, regular verifications (EN 378), leakage, etc.
Engineers working on the electrical or refrigeration
components must be authorised, trained and fully qualified to
do so.
All refrigerant circuit work must be carried out by a trained
person, fully qualified to work on these units. He/she must
have been trained and be familiar with the equipment and
the installation. All welding operations must be carried out
by qualified specialists.
Any manipulation (opening or closing) of a shut-off valve
must be carried out by a qualified and authorised engineer,
observing applicable standards (e.g. during draining
operations). The unit must be switched off during
maintenance.
NOTE: The unit must never be left shut down with the liquid
line valve closed, as liquid refrigerant can be trapped between
this valve and the expansion device and lead to the risk of
a pressure increase. This valve is situated on the liquid line
before the filter drier box.
During any handling, maintenance and service operations
the engineers working on the unit must be equipped with
safety gloves, glasses, shoes and protective clothing.
Never work on any of the electrical components, until the
general power supply to the unit has been cut using the
disconnect switch(es) in the control box(es).
If any maintenance operations are carried out on the unit,
lock the power supply circuit in the open position ahead of
the machine.
CAUTION: The variable frequency drives used in the
30XAV units are equipped with capacitor batteries with a
discharge time of twenty (20) minutes after disconnecting
the power supply. After disconnecting the power supply of
the control box, wait twenty minutes before opening the
control box. Before any intervention, verify that there is no
voltage present at any accessible conducting parts of the
power circuit.
If the work is interrupted, always ensure that all circuits
are still deenergised before resuming the work.
ATTENTION: Even if the unit has been switched off, the
power circuit remains energised, unless the unit or circuit
disconnect switch is open. Refer to the wiring diagram for
further details. Attach appropriate safety labels.
When working in a fan area, specifically if the grilles have
to be removed, isolate the power supply to the fans to prevent
their operation
Applicable Verification
national Organism
regulations
5