Panasonic S-45PU1E5 Technical Data & Service Manual page 315

CAUTION
1. This unit requires no additional refrigerant charge up to tubing length 20 m (50 type: 30 m).
In case of more than 20 m (50 type: 30 m), additional refrigerant charge is required.
2. In case of multi type installation, indoor units should be installed within the same room.
If multi type indoor units are installed in different rooms, temperature control may develop problems
because thermostat operation must follow the thermostat condition of 1 indoor unit only (the main unit).
WARNING
Always check the gas density for the room in which the unit is installed.
Check of limit density
When installing an air conditioner in a room, it is necessary to ensure that even if the refrigerant gas accidentally
escapes, its density does not exceed the limit level.
If the density might exceed the limit level, it is necessary to set up an opening between it and the adjacent room,
or to install mechanical ventilation which is interlocked with the leak detector.
(Total refrigerant charged amount: kg)
(Min. indoor volume where indoor unit is installed: m
The limit density of refrigerant which is used in this unit is 0.3 kg/m
The shipped outdoor unit comes charged with the amount of refrigerant fixed for each type, so add it to the amount
that is charged at the field. (Refer to the unit's nameplate for the amount of charged refrigerant at shipment.)
Minimum indoor volume & floor area relative to the amount
of refrigerant are roughly as given in the following table.
2
m m
50 135
45 121.5
40 108
35 94.5
30 81.0
25 67.5
20 54.0
15 40.5
10 27.0
5 13.5
CAUTION
Pay special attention to any location, such as a basement or recessed area, etc. where leaked refrigerant
can collect, since refrigerant gas is heavier than air.
3
Range below the
density limit of
3
0.3 kg/m
(Countermeasures
not needed)
Range above
the density limit
of 0.3 kg/m 3
(Countermeasures
needed)
10 20 30
Total amount of refrigerant
< Limit density 0.3 (kg/m
)
3
3 (ISO 5149).
40kg
1-305
1
3 )