5
Periodic check of the safety valves: See paragraph 1.3
- “Maintenance safety considerations”.
Provide a drain in the drain pipe, close to each safety valve,
to avoid an accumulation of condensate or rain water.
All precautions concerning handling of refrigerant must
be observed in accordance with local regulations.
Ensure good ventilation, as accumulation of refrigerant in
an enclosed space can displace oxygen and cause asphyxia-
tion 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.
We recommend that you consult your appropriate national
trade association or the owner of the equipment or compo-
nents under pressure (declaration, re-qualification, retesting,
etc.). The characteristics of this equipment/these components
are given on the nameplate or in the required documenta-
tion, supplied with the products.
Do not introduce significant static or dynamic pressure with
regard to the operating pressures used during operation or
for tests in the refrigerant circuit or in the heat exchange
circuits, specifically by limiting the glycol cooler elevation.
1.3 - Maintenance safety considerations
Engineers working on the electric or refrigeration compo-
nents must be authorized, trained and fully qualified to do so.
All refrigerant circuit repairs must be carried out by a trained
person, fully qualified to work on these units. He 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. These procedures must be carried out with the
unit shut down.
ATTENTION: The liquid line valve must always be fully
open, when there is refrigerant in the circuit (this valve is
situated on the liquid line before the filter drier box.
Any intervention on the refrigerant circuit, including
changing of drier blocks, is only permitted after the
complete removal of the refrigerant charge. For these
units transfer of the refrigerant charge from the high or
low-pressure side is not possible, nor permitted.
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 a unit that is still energised.
Never work on any of the electrical components, until the
general power supply to the unit has been cut using the
disconnect switch in the control box.
If any maintenance operations are carried out on the unit,
lock the power supply circuit in the open position ahead
of the machine.
If the work is interrupted, always ensure that all circuits
are still deenergized before resuming the work.
ATTENTION: Even if the compressor motors have been
switched off, the power circuit remains energized, unless
the unit or circuit disconnect switch is open. Refer to the
wiring diagram for further details.
Attach appropriate safety labels.
Operating checks:
IMPORTANT INFORMATION REgARDINg ThE
REFRIgERANT USED:
•
This product contains fluorinated greenhouse gas
covered by the Kyoto protocol.
Refrigerant type: R-407C
global Warming Potential (gWP): 1653
Periodic inspections for refrigerant leaks may be
required depending on European or local legislation.
Please contact your local dealer for more information.
•
During the life-time of the system, inspection and
tests must be carried out in accordance with national
regulations.
The information on operating inspections given in annex
C of standard EN278-2 can be used if no similar criteria
exist in the national regulations.
Protection device checks:
•
If no national regulations exist, check the protection
devices on site in accordance with standard EN378:
once a year for the high-pressure switches, every five
years for external safety valves.
•
Check manual “30RW/RWA Pro-Dialog Plus control”
for a detailed explanation of the high-pressure switch
test method.
At least once a year thoroughly inspect the protection
devices (valves, pressure switches). If the machine operates
in a corrosive environment, inspect the protection devices
more frequently.
Regularly carry out leak tests and immediately repair
any leaks.
