Handleiding
Je bekijkt pagina 12 van 48
12
12. Charging procedures
In addition to conventional charging procedures, the following requirements shall
when using charging equipment. Hoses or lines shall be as short as possible to
minimize the amount of refrigerant contained in them. Cylinders shall be kept in
an appropriate position according to the instructions. Ensure that the
refrigeration system is earthed prior to charging the system with refrigerant.
Label the system when charging is complete (if not already). Extreme care shall
be taken not to overfill the refrigeration system. Prior to recharging the system it
shall be pressure tested with OFN. The system shall be leak tested on completion
charging but prior to commissioning. A follow up leak test shall be carried out
prior to leaving the site.
13.
Decommissioning
Before carrying out this procedure, it is essential that the technician is completely
familiar with the unit and all its det
ail. It is recommended good practice that all
refrigerants are recovered safely. Prior to the task being carried out, an oil and
refrigerant sample shall be taken in case analysis is required prior to re-use of
reclaimed refrigerant. It is essential that electrical power is available before the
task is commenced.
a) Become familiar with the unit and its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure that: mechanical handling equipment is
available, if required, for handling refrigerant cylinders; all personal protective
equipment is available and being used correctly; the recovery process is supervised
at all times by a competent person; recovery equipment and cylinders conform to the
appropriate standards.
d) Pump down refrigerant system, if po
ssible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from
various parts of the system.
f ) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with instructions.
h) Do not overfill cylinders. (No more than 80% volume liquid charge.)
i ) Do not exceed the maximum working pressure of the cylinder, even temporarily.
The refrigerant charge shall be recovered into the correct recovery cylinders if
venting is not allowed by local and national codes. For appliances containing
flammable refrigerants, the system shall be purged with oxygen-free nitrogen to
render the appliance safe for flammable refrigerants. This process might need t
o
be repeated several times. Compressed air or oxygen shall not be used for purg-
ing refrigerant systems.For appliances containing flammable refrigerants, refrig-
erants purging shall be achieved by breaking the vacuum in the system with
oxygen-free nitrogen and continuing to fill until the working pressure is achieved,
then venting to atmosphere, and finally pulling down to a vacuum (optional for
A2L). This process shall be repeated until no refrigerant is within the system
(optional for A2L). When the final oxygen-free nitrogen charge is used. the
system shall be vented down to atmospheric pressure to enable work to take
place. The outlet for the vacuum pump shall not be close to any potential ignition
sources, and v
entilation shall be available.
Bekijk gratis de handleiding van Midea MAW12V1YWT-S, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Midea |
| Model | MAW12V1YWT-S |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 4788 MB |
