18-EN
17-EN
– 9 –
CAUTION
When a
fl
ammable refrigerant is used, all appliance shall be
charged with refrigerant at the manufacturing location or charged
on site as recommended by the manufacturer.
A part of an appliance that is charged on site, which requires
brazing or welding in the installation shall not be shipped with
a
fl
ammable refrigerant charge. Joints made in the installation
between parts of the refrigerating system, with at least one part
charged, shall be made in accordance with the following.
- A brazed, welded, or mechanical connection shall be made
before opening the valves to permit refrigerant to
fl
ow between
the refrigerating system parts. A vacuum valve shall be provided
to evacuate the interconnecting pipe and/or any uncharged
refrigerating system part.
- Refrigerant tubing shall be protected or enclosed to avoid
damage. Flexible refrigerant connectors (such as connecting
lines between the indoor and outdoor unit) that may be
displaced during normal operations shall be protected against
mechanical damage.
• Piping shall be protected from damage during installation,
operation and maintenance.
• When installing piping in the occupied space, protect the piping
from accidental damage.
• Check the piping as described in [8 Refrigerant piping]
[Airtightness test].
• Wherever possible, protection, piping and
fi
xtures shall be
protected against the environment and weather resistance.
• You must prepare for long-term expansion and contraction of
piping.
• Indoor equipment and plumbing must be safely installed and
protected from accidental rupture of equipment or plumbing from
events such as furniture movements or home renovations.
General (Installation space / area)
• The installation of pipe-work shall be kept to a minimum.
• Pipe-work shall be protected from physical damage.
• The compliance with national gas regulations shall be observed.
• The mechanical connections shall be accessible for maintenance
purposes.
• In cases that require mechanical ventilation, ventilation openings
shall be kept clear of obstruction.
• When disposing of the product is used, be based on national
regulations with properly processed.
• The servicing shall be performed only as recommended by the
manufacturer.
• Where the appliance using
fl
ammable refrigerants is installed,
Be aware that;
- The appliance shall be stored in a well-ventilated area where
the room size corresponds to the room area as speci
fi
ed for
operation.
- The appliance shall be stored in a room without continuously
operating open
fl
ames (for example an operating gas
appliance) and ignition sources (for example an operating
electric heater).
- The appliance shall be stored so as to prevent mechanical
damage from occurring.
• Equipment piping in the occupied space shall be installed in such
a way to protect against accidental damage in operation and
service.
• Precautions shall be taken to avoid excessive vibration or
pulsation to refrigerating piping.
2
Precautions of equipment using R32
refrigerant
