Dismantling, Demolition And Scrapping; Generalities - comatec AQWL Installations- Und Wartungshandbuch

During the draining of the refrigeration
circuits, do not let the refrigerant overflow in
the surrounding atmosphere.
The circuit must be drained using suitable
DANGER
recovery equipment.
Do not disperse the waste oil of the
compressors in the environment, since it
contains some dissolved refrigerant.
DANGER
For the disposal, contact the competent authority for information.
Unless otherwise specified, the maintenance operations 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 disconnecting switches are secured
in the off position. The power cables can be disconnected and
disassembled. Refer to Chapter 4 for the position of connection
points.
Remove all the refrigerant from the refrigeration circuits of the
unit and store it in suitable containers, using a recovery unit. If its
characteristics have remained the same, the refrigerant can be used
again. Contact the competent authority to obtain information about
disposal. In NO event shall the refrigerant be discharged into the
atmosphere. The oil in each refrigeration circuit must be drained and
collected into 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 sections 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.
DANGER
For NO reason shall a circuit containing
glycoled water or a similar solution be
discharged directly into the drains or surface
waters.

12 - Dismantling, Demolition and Scrapping

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 suitable
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 removed in a single
piece, must be dismantled on site; in this case, be very careful with
the weight and handling 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 similar
solutions may remain in certain parts of the
unit. These residues must be recovered and
disposed of according to the procedures
DANGER
specified above.
It is very important to ensure that, while a component of the unit is
being removed, all the others are properly supported.
Use only lifting means of adequate capacity.
DANGER
Once disassembled, the components of the unit can be disposed of
in conformity with current regulations.
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