Airwell CWP-CO 04 [41/42] Dismantling demolition and scrapping
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Airwell CWP-CO 04 [41/42] Dismantling demolition and scrapping

Airwell CWP-CO 04 [41/42] Dismantling demolition and scrapping
Page 40
Dismantling, Demolition and Scrapping
12 DISMANTLING, DEMOLITION
AND SCRAPPING
During the draining of the refrigeration cir-
cuits, do not let the refrigerant overflow in
the surrounding atmosphere.
The circuit must be drained using suitable
recovery equipment.
Do not disperse the waste oil of the com-
pressors in the environment, since it con-
tains some dissolved refrigerant.
For the disposal, contact the competent authority for
information.
Unless otherwise specified, the maintenance opera-
tions listed below may be carried out by any trained
maintenance operator.
12.1 Generalities
Open each line that supplies the unit, including the
ones of control circuits. Make sure that all discon-
necting switches are secured in the off position. The
power cables can be disconnected and disassem-
bled. Refer to Chapter 4 for the position of connec-
tion points.
Remove all the refrigerant from the refrigeration cir-
cuits of the unit and store it in suitable containers, us-
ing a recovery unit. If its characteristics have re-
mained the same, the refrigerant can be used again.
Contact the competent authority to obtain informa-
tion about disposal. In NO event shall the refrigerant
be discharged into the atmosphere. The oil in each
refrigeration circuit must be drained and collected in-
to a suitable container; then it shall be disposes of in
conformity with local regulations that apply to the
disposal of waste lubricants. Any oil spillage must be
recovered and disposed of in like manner.
Isolate the unit’s heat exchangers from the external
hydraulic circuits and drain the heat exchange sec-
tions of the plant.
If no shutoff valves have been provided, it
may be necessary to drain the whole plant.
If a glycoled solution or a similar fluid has
been used in the hydraulic circuits, or if
chemical additives have been added to the
circulating water, the circulating fluid MUST
be drained in a proper way.
For NO reason shall a circuit containing
glycoled water or a similar solution be dis-
charged directly into the drains or surface
waters.
After draining operations, the piping of the hydraulic
networks can be disconnected and disassembled.
Once they have been disconnected as specified, the
packaged units can be disassembled in a single
piece. First of all, disassemble the anchoring screws
and then lift the unit from the position of installation,
and hook it to the lifting points provided, using suit-
able lifting equipment.
To this end, refer to Chapter 4 for the installation of
these appliances, to Chapter 8 for their weights and
Chapter 3 for handling.
The units that, once disconnected, cannot be re-
moved in a single piece, must be dismantled on site;
in this case, be very careful with the weight and han-
dling of every single component.
It is always advisable to dismantle the units following
the installation steps, but in reverse.
Some residues of oil, glycoled water or sim-
ilar solutions may remain in certain parts of
the unit. These residues must be recovered
and disposed of according to the proce-
dures specified above.
It is very important to ensure that, while a component
of the unit is being removed, all the others are prop-
erly supported.
Use only lifting means of adequate capaci-
ty.
Once disassembled, the components of the unit can
be disposed of in conformity with current regula-
tions.
Manuale CWP 4.11.2005 11:56 Pagina 40

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