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10
Important Safety Instructions
4. Storage of Equipment
The storage of this equipment should be in accordance with the manufacturer's instructions.
5. Information on Servicing
1) Checks to the area
Before working on systems containing flammable refrigerants, it is necessary to ensure that
the risk of ignition is minimized. Comply with the following precautions before working on or
repairing the refrigerating system.
2) Work procedure
Work shall be undertaken under a controlled procedure to minimize the risk of a flammable gas
or vapor being present while the work is being performed.
3) General work area
All maintenance staff and other people working in the local area shall be instructed on the
nature of work being carried out. Work in confined spaces shall be avoided. The area around the
workspace shall be sectioned off. Ensure that the conditions within the area have been made
safe through control of the flammable material.
4) Checking for the presence of refrigerants
The area shall be checked with an appropriate refrigerant detector prior to and during work
to ensure that the technician is aware of potentially flammable atmospheres. Ensure that the
leak detection equipment being used is suitable for use with flammable refrigerants, i.e., non-
sparking, adequately sealed, or intrinsically safe.
5) Presence of a fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts,
appropriate fire extinguishing equipment shall be on hand. Be sure to have a dry powder or CO2
fire extinguisher adjacent to the charging area.
6) No ignition sources
No person carrying out work in relation to a refrigeration system which involves exposing any
pipe work that contains or used to contain flammable refrigerant shall use any sources of ignition
in such a manner that may lead to the risk of fire or an explosion. All possible ignition sources
including cigarette smoking should be kept at a sufficient distance from the site of installation,
repair, removal, and disposal, during which flammable refrigerant can possibly be released to the
surrounding space. Prior to work taking place, the area around the equipment is to be surveyed
to make sure that there are no flammable hazards or ignition risks. No Smoking signs shall be
displayed.
7) Ventilated area
Ensure that the area is an open space or that it is adequately ventilated before breaking into the
system or conducting any hot work. There should be a degree of continuous ventilation while
the work is being carried out. The ventilation should safely disperse any released refrigerant and
preferably expel it externally into the atmosphere.
8) Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for the purpose and to the
correct specification. At all times, the manufacturer's maintenance and service guidelines shall
be followed. When in doubt, consult Customer Service for assistance. The following checks shall
be applied to installations using flammable refrigerants:
The charge size is in accordance with the room size within which the parts containing
refrigerants are installed.
The ventilation machinery and outlets should operate adequately and should not obstructed;
ifan indirect refrigerating circuit is being used, the secondary circuit shall be checked for the
presence of refrigerants.
Any marking to the equipment should continue to be visible and legible. Markings and signs that
are illegible shall be corrected.
Refrigeration pipes or components are installed in a position where they are unlikely to be
exposed to any substance which may corrode refrigerant containing components, unless the
components are constructed of materials which are inherently resistant to being corroded or are
suitably protected against being corroded.
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