Toshiba MMU-UP0091H-E Installation Manual page 9

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 flammable 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 specified for operation.
- The appliance shall be stored in a room without continuously
operating open flames (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.
• Protection devices, piping and fittings shall be protected as far as
possible against adverse environmental effects, for example, the
danger of water collecting and freezing in relief pipes or the
accumulation of dirt and debris.
• Provision shall be made for expansion and contraction of long runs of
piping.
• Piping in refrigerating systems shall be so designed and installed to
minimize the likelihood hydraulic shock damaging the system.
• Solenoid valves shall be correctly positioned in the piping to avoid
hydraulic shock.
• Solenoid valves shall not block in liquid refrigerant unless adequate
relief is provided to the refrigerant system low pressure side.
• 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. They should be
checked for mechanical damage annually.
15-EN
• The indoor equipment and pipes shall be securely mounted and
guarded such that accidental rupture of equipment cannot occur from
such events as moving furniture or reconstruction activities.
• Where safety shut off valves are specified, the minimum room area
may be determined based on the maximum amount of refrigerant that
can be leaked as determined in Installation Manual.
• Where safety shut off valves are specified, the location of the valve in
the refrigerating system relative to the occupied spaces shall be as
described in Installation Manual.
• 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.
• The total refrigerant charge in the system cannot exceed the
requirements for minimum floor area of the smallest room that is
served. For minimum floor area requirements for indoor units, see the
Installation and Owner's Manual of the outdoor unit.
• When connecting to an outdoor unit of R32 refrigerant and using a
leak detector, always turn on the power of the indoor unit after
installation except during service in order to detect refrigerant leakage
and take safety measures.
Unventilated area
• The appliance shall be stored so as to prevent mechanical damage
from occurring.
Information on servicing
1.Check to the area
• Prior to beginning work on systems containing flammable
refrigerants, safety checks are necessary to ensure that the risk of
ignition is minimized. For repair to the refrigerating system, the
precautions in item 2 to 6 shall be complied with prior to conducting
work on the system.
2.Work procedure
• Work shall be undertaken under a controlled procedure so as to
minimize the risk of a flammable gas or vapour being present while
the work is being performed.
• When connecting to an outdoor unit of R32 refrigerant and using a
leak detector, the fan may automatically operate even if the air
conditioner is stopped when a refrigerant leak is detected. Be careful
not to get injured by the fan.
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16-EN