[ 2 ] [Safety Measures] - Toshiba MMY-SUG0801MT8P-E Installation Manual

WARNING
• The total amount of refrigerant in the system must be less than or equal to the maximum allowable total amount
of refrigerant.
The maximum allowable amount of refrigerant = (The number of connected indoor units) x 15.96 [kg] and the
maximum is 63.85 [kg].
• Keep the installation height according to the indoor unit type.
Ceiling-mounted unit (include Duct type.) : 2.2 m or more.
For Duct type, both inlet and outlet shall be placed at least 2.2 m.
Inlet and outlet shall not be located above the unit.
Wall-mounted and under ceiling unit
But install the indoor unit at least 2.5 m above the floor level since otherwise the users may injure themselves or
receive electric shocks if they poke their fingers or other objects into the indoor unit while the air conditioner is
running.
NOTE
• The maximum total amount of refrigerant allowed depends on the area of the room the system serves and the
room on the lowest floor of the basement.
• Please confirm that the condition for total system refrigerant amount is satisfied for [ 5 ] [To determine the limit
on the amount of additional refrigerant].
If the installation becomes impossible in the condition of [1], redesign the system again.

[ 2 ] [Safety measures]

This unit is equipped with a refrigerant leak detector and safety Shut-off Valves for safety.
For each indoor unit, the number of safety devices varies depending on the installation floor, total system
refrigerant amount, indoor unit installation height, and LFL value.
It's not necessary to install the safety devices when the air conditioning system is installed in a large space of
LFL/4 or less.(each indoor room, outdoor area)
Area Safety system Safety measures
(a) No safety 0 pc. -
measures
(a)(b) Leak Detector
1 pc. LD
only.
(a)(b) Pump-down
2 pcs. LD, FS unit or
(c) operation.
SV unit
(a)(b) Individual
2 pcs. LD, FS unit (single port)
(c) shut-off
or SV unit
operation.
33-EN
: 1.8 m or more.
LD : Leak Detector
SV : Shut-off Valve
FS : Flow Selector
Safety system operation subsequent status
No safety system operation. Not applicable
When a leak is detected, operation Operation cannot be
stops. continued.
When a leak is detected, a system Operation cannot be
does Refrigerant recovery to continued.
Outdoor unit side by pump-down (Refrigerant system
operation and closes all safety will be locked.)
shut-off valves. After that, all
systems stop.
When a leak is detected, safety Operation cannot
Shut-off Valves close only for the be continued only
indoor units which refrigerant is for the indoor units
leaked. After that, all systems stop. which refrigerant
is detected. Other
indoor units can
continue to operate.
– 17 –
WARNING
• For the refrigerant 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 Flow Selector unit and 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 Flow Selector unit, 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 ] [Safety shut-off valve installation].
[Each safety system and installation example]
CODE
No. Installation example
[107]
e
FS-M
a
[00]
b b
Area (a)
e
FS-M
a
b b
[01]
c
Area (c) Area (c)
Case
When installing in a room corresponding to
area (a), set the CODE No. [107] to [00].
No additional safety measures are required.
b
When installing in a room corresponding to
area (c), set the CODE No. [107] to [01] or [02].
f
Be sure to install a refrigerant leak detector.
Be sure to connect the FS unit (or Shut-off
Valve unit) and install the battery unit.
b
When the CODE No. [107] is set to [01], the
entire system will be stopped when refrigerant
c c
leakage is detected.
Area (c)
In the [01] setting and [02] setting of the
CODE No. [107], the position where the FS
unit (or Shut-off Valve unit) can be installed is
different.
FS : Flow Selector
34-EN