EN-5
ENGLISH
SAFETY PRECAUTIONS (Continued)
• Steel pipes and components shall be protected against corrosion with a rustproof
coating before applying any insulation
• Flexible pipe elements shall be protected against mechanical damage,
excessive stress by torsion, or other forces, and that they should be checked for
mechanical damage annually.
• The appliance must be installed, operated and stored in a room with a oor area
larger than 43 ft
2
(4 m
2
), if it is the multi zone system, the oor area need larger
than 46 ft
2
(4.3 m
2
). Minimum installation height, 6 ft (1.8 m).
• After completion of eld piping for split systems, the eld pipe work shall be
pressure tested with an inert gas and then vacuum tested prior to refrigerant
charging, according to the following requirements:
The minimum test pressure for the low side of the system shall be the low side
design pressure and the minimum test pressure for the high side of the system
shall be the high side design pressure, unless the high side of the system,
cannot be isolated from the low side of the system in which case the entire
system shall be pressure tested to the low side design pressure.
• Field-made refrigerant joints indoors shall be tightness tested. The test method
shall have a sensitivity of 5 grams per year of refrigerant or better under a
pressure of at least 0,25 times the maximum allowable pressure. No leak shall
be detected.
• Checking for presence of refrigerant: The area shall be checked with an
appropriate refrigerant detector prior to and during work, to ensure the technician
is aware of potentially toxic or ammable atmospheres. Ensure that the leak
detection equipment being used is suitable for use with all applicable refrigerants, i.
e. non-sparking, adequately sealed or intrinsically safe.
• Presence of re extinguisher: If any hot work is to be conducted on the
refrigerating equipment or any associated parts, appropriate re extinguishing
equipment shall be available to hand. Have a dry powder or CO2 re
extinguisher adjacent to the charging area.
• No ignition sources: No person carrying out work in relation to a
REFRIGERATING SYSTEM which involves exposing any pipe work shall use
any sources of ignition in such a manner that it may lead to the risk of re or
explosion. All possible ignition sources, including cigarette smoking, should be
kept suciently far away from the site of installation, repairing, removing and
disposal, during which 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 ammable hazards or ignition risks. “No
Smoking” signs shall be displayed.
• Ventilated area: Ensure that the area is in the open or that it is adequately
ventilated before breaking into the system or conducting any hot work. A degree
of ventilation shall continue during the period that the work is carried out. The
ventilation should safely disperse any released refrigerant and preferably expel it
externally into the atmosphere.
• Checks to the refrigerating equipment: Where electrical components are being
changed, they shall be t for the purpose and to the correct specication. At all
times the manufacturer’s maintenance and service guidelines shall be followed.
If in doubt, consult the manufacturer’s technical department for assistance.
The following checks shall be applied to installations using FLAMMABLE
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