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WARNING
• For Leak Detector to function, the unit shall be powered on at all times after installation, except during service.
• If LFL area is (c), install Battery kit in each applicable Shut-off Valve unit.
They can shut-off the refrigerant by Battery kits even in the event of a power failure.
(Make sure there are no leaks before use as charging may not be in time during a continuous system power off.)
NOTE
• If there are multiple indoor units with different safety systems in refrigerant system, safety system behaviors may
be different in each indoor unit.
(Installation patterns for each safety measure)
The table below shows installation example of safety measures for each safety system.
Position where Leak Detector and Shut-off Valve unit can be installed is determined by room area, combination,
indoor unit type and capacity, etc.
For details, refer to [ 3 ] [Leak Detector installation] and [ 4 ] [Shut-off Valve installation].
[Each safety system and installation example]
Indoor
DN CODE
Installation example
No [107]
a
[00]
b
Area(a)
e
d
a
[01]
or
b
[02]
c
Area(c)
29-EN
Case
• When installing in a room corresponding
to area (a), set the CODE No. [107] to [00].
b
b
No additional safety measures are
required.
• When installing in a room corresponding
to area (c), set the CODE No. [107] to [01]
or [02].
• Be sure to install Leak Detector.
• Be sure to connect the Shut-off Valve unit
and install the battery unit.
• When the CODE No. [107] is set to [01],
e
d
e
d
the entire system will be stopped when
refrigerant leakage is detected.
b
b
• When the CODE No. [107] is set to [02],
the corresponding indoor unit wii be
stopped when refrigerant leakage is
detected (other indoor units can continue
c
c
operation).
Area(c)
Area(c)
• The position where the Shut-off Valve unit
can be installed is different according to the
setting of the CODE No. [107] ([01] or [02]).
– 15 –
Indoor
DN CODE
Installation example
No [107]
a
[03]
b
Area(b)
a : Outdoor unit, b : Indoor unit, c : Leak Detector, d : Shut-off Valve unit, e : Battery kit
[3] [Leak Detector installation]
See Installation Manual included in Leak Detector for information on installing Leak Detector.
The Leak Detector implements have safety measures to light up in red and to sound a buzzer, that will warn in case
of a refrigerant leak.
For the leak detector installation of R32 air conditioning system, check the following before installing.
WARNING
• Leak Detector used as a safety device for the air conditioning system shall be used the specified Toshiba
optional product.
• Leak Detector installation shall be complied with the following requirements.
1. Leak detector shall be installed in each room that requires a safety measure.
2. The installation position shall be determined by the type and height of the indoor unit and the presence or the
absence of obstacles between the indoor unit and Leak Detector.
• Leak Detector shall be installed outside the indoor unit within a height of 300 mm from the floor.
• Leak Detector shall be located within 10 m horizontal distance in line sight of the unit and on a wall within the
room in which the unit is installed, or 7 m, if not in line sight of the unit, and on a wall within the room in which
the unit is installed. The distance from the unit to Leak Detector shall be measured as the shortest horizontal
unobstructed path between the unit and the nearest Leak Detector.
• The alarm shall always be 15 dB(A) louder than the room background noise.
Leak Detector can generate a 65 dB(A) alarm. (Sound pressure level, measured at a distance of 1 m from
the alarm.)
If the surrounding environment is noisy in a particular room, we recommend that you use an external alarm
(by local power supply) in that room.
Leak Detector has output terminals to external ventilation and an external alarm.
When taking safety measures using external ventilation or an external alarm, install according to the installation
manual for Leak Detector.
• When the CODE No. [107] is set to [03] by
area (b), the entire system stops when
refrigerant leakage is detected.
b
• Be sure to install Leak Detectors.
This setting can only be used in rooms that
fall under area (b).
c
c
Area(b)
Case
30-EN
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