37MGHAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
6
16. Decommissioning
Before carrying out this procedure, it is essential that the technician is
completely familiar with the equipment and all its detail. 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 recovered refrigerant.
It is essential that electrical power is available before the task
is commenced.
a. Become familiar with the equipment 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 possible.
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.
j. When the cylinders have been filled correctly and the process
completed, make sure that the cylinders and the equipment are
removed from site promptly and all isolation valves on the
equipment are closed off.
k. Recovered refrigerant shall not be charged into another
refrigeration system unless it has been cleaned and checked.
17. Labeling
Equipment shall be labeled stating that it has been de-commissioned and
emptied of refrigerant. The label shall be dated and signed. For appliances
containing FLAMMABLE REFRIGERANTS, ensure that there are labels
on the equipment stating the equipment contains FLAMMABLE
REFRIGERANT.
18. Recovery
When removing refrigerant from a system, either for servicing or
decommissioning, it is recommended good practice that all refrigerants
are removed safely.When transferring refrigerant into cylinders, ensure
that only appropriate refrigerant recovery cylinders are employed.
Ensure that the correct number of cylinders for holding the total system
charge is available. All cylinders to be used are designated for the
recovered refrigerant and labeled for that refrigerant (i. e. special
cylinders for the recovery of refrigerant). Cylinders shall be complete
with pressure-relief valve and associated shut-off valves in good working
order. Empty recovery cylinders are evacuated and, if possible, cooled
before recovery occurs.
The recovery equipment shall be in good working order with a set of
instructions concerning the equipment that is at hand and shall be suitable
for the recovery of the flammable refrigerant. If in doubt, the
manufacturer should be consulted. In addition, a set of calibrated
weighing scales shall be available and in good working order. Hoses shall
be complete with leak-free disconnect couplings and in good condition.
The recovered refrigerant shall be processed according to local legislation
in the correct recovery cylinder, and the relevant waste transfer note
arranged. Do not mix refrigerants in recovery units and especially not in
cylinders. If compressors or compressor oils are to be removed, ensure
that they have been evacuated to an acceptable level to make certain that
flammable refrigerant does not remain within the lubricant. The
compressor body shall not be heated by an open flame or other ignition
sources to accelerate this process. When oil is drained from a system, it
shall be carried out safely.
19. Transportation, marking and storage for units
1. Transport of equipment containing flammable refrigerants.
Compliance with the transport regulations.
2. Marking of equipment using signs.
Compliance with local regulations.
3. Disposal of equipment using flammable refrigerants.
Compliance with national regulations.
4. Storage of equipment/appliances.
The storage of the appliance should be in accordance with the manufac-
turer’s instructions.
5. Storage of packed (unsold) equipment.
Storage package protection should be constructed in such a way that
mechanical damage to the equipment inside the package will not cause
a leak of the refrigerant charge. The maximum number of pieces of
equipment permitted to be stored together will be determined by local
regulations.
Explanation of symbols displayed on the indoor unit or out-
door unit.
WARNING
This symbol shows that this appli-
ance used a flammable refrigerant. If
the refrigerant is leaked and
exposed to an external ignition
source, there is a risk of fire.
CAUTION
This symbol shows that the opera-
tion manual should be read carefully.
CAUTION
This symbol shows that a service
personnel should be handling this
equipment with reference to the
installation manual.
CAUTION
CAUTION
This symbol shows that information
is available such as the operating
manual or installation manual.
To Next Page
Loading...
