Toshiba MCY-MUG0401HSW-E Service Manual page 116

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 = 13.1 [kg].
• Keep the installation height according to the indoor unit type.
Ceiling-mounted unit (include Duct type.) : 2.2 m or more.
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 Leak Detectors and Shut-off Valve units 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
No safety
(a)
measures
(a)(b) Leak Detector only. 1 pc.
Pump-down
(a)(b)(c)
operation.
(a)(b)(c) Individual shut-off
: 1.8 m or more.
Safety measures Safety system operation
0 pc. - No safety system operation.
When a leak is detected,
LD
operation stops.
When a leak is detected, a
system does Refrigerant
LD or recovery to outdoor unit by
2 pcs.
SV unit pump-down operation and
closes all safety shut-off valves.
After that, all systems stop.
When a leak is detected, safety
shut-off valves close only for the
LD or
2 pcs. indoor units which refrigerant is
SV unit
leaked. After that, all systems
stop.
115
LD : Leak Detector
SV : Shut-off Valve units
subsequent status
Not applicable
Operation cannot be continued.
Operation cannot be continued.
(Refrigerant system will be locked.)
Operation cannot be continued only
for the indoor units which refrigerant
is detected. Other indoor units can
continue to operate.