Toshiba MMU-UP0151SH-E Installation Manual page 8

Precautions for using R32 refrigerant
The basic installation work procedures are the same as conventional
refrigerant (R410A, R22) models.
However, Please read through this manual after understanding the
contents below;
These safety cautions describe important matters concerning safety to
prevent injury to users or other people and damages to property. Please
read through this manual after understanding the contents below
(meanings of indications), and be sure to follow the description;
Meanings of symbols displayed on the unit
This mark is for R32 refrigerant only.
Refrigerant type is written on nameplate of
outdoor unit.
WARNING In case that refrigerant type is R32, this unit
(Risk of fire) uses a flammable refrigerant.
If refrigerant leaks and comes in contact with
fire or heating part, it will create harmful gas
and there is risk of fire.
Read the OWNER'S MANUAL carefully before operation.
Service personnel are required to carefully read the
OWNER'S MANUAL and INSTALLATION MANUAL before
operation.
Further information is available in the OWNER'S MANUAL,
INSTALLATION MANUAL, and the like.
13-EN
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WARNING
• Models that use refrigerant R32 and R410A have a different charging
port thread diameter to prevent erroneous charging with refrigerant
R22 and for safety.
• Do not use means to accelerate the defrosting process or to clean,
other than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously
operating ignition sources. (For example: open flames, an operating
gas appliance or an operating electric heater.)
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odor.
• The manufacturer may provide other suitable examples or may
provide additional information about the refrigerant odor.
CAUTION
When a flammable refrigerant is used, all appliances 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 flammable
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 flow between the
refrigerating system parts. A vacuum valve shall be provided to
evacuate the interconnecting pipe and/or any uncharged
refrigerating system part.
- Mechanical connectors used indoors shall comply with ISO 14903.
When mechanical connectors are reused indoors, sealing parts
shall be renewed. When flared joints are reused indoors, the flare
part shall be re-fabricated.
- 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.
14-EN