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9-9. Additional refrigerant charge
Charge refrigerant in a liquid state.
- Charging refrigerant in the gaseous state will change the composition of the refrigerant and lead
to a performance drop.
Do not use a charging cylinder when charging refrigerant.
- The use of a charging cylinder may change the composition of the refrigerant and lead to a
performance drop.
The table below summarizes the factory-charged amount of refrigerant, the maximum amount of refrigerant to be
added on site, and the maximum total amount of refrigerant in the system.
Factory-
Unit model
charged
amount
P200YNW
5.2 (184)
P250YNW
5.2 (184)
P300YNW
5.2 (184)
P350YNW
8.0 (283)
P400YNW
8.0 (283)
P400YSNW
10.4 (367)
P450YNW
10.8 (381)
P450YSNW
10.4 (367)
P500YNW
10.8 (381)
P500YSNW
10.4 (367)
P550YNW
10.8 (381)
P550YSNW
10.4 (367)
P600YSNW
10.4 (367)
P650YSNW
13.2 (466)
P700YSNW
16.0 (565)
P750YSNW
16.0 (565)
P800YSNW
16.0 (565)
P850YSNW
18.8 (664)
P900YSNW
21.6 (762)
P950YSNW
21.6 (762)
P1000YSNW
21.6 (762)
P1050YSNW
21.6 (762)
P1100YSNW
21.6 (762)
Both refrigerant overcharge and undercharge will cause problems. Charge the system with the proper amount of
refrigerant.
Record the added refrigerant amount on the label attached to the control box panel for future servicing.
9-9-1. Calculation of the amount of additional refrigerant
・The amount of refrigerant to be added depends on the size and the total length of the high-pressure piping and
liquid piping.
・Calculate the amount of refrigerant to be charged according to the formula below.
・Round up the calculation result to the nearest 0.1 kg (0.1 oz).
・Refer to the HBC controller Installation Manual for the additional amount of refrigerant for a Hybrid City Multi
system.
・The refrigerant does not need to be added for the indoor units in a Hybrid City Multi system.
WT09973X01
Maximum
Maximum total
amount to be
amount in the
added on site
system
31.8 (1122)
37.0 (1306)
37.8 (1333)
43.0 (1517)
37.8 (1333)
43.0 (1517)
41.3 (1457)
49.3 (1740)
47.3 (1668)
55.3 (1951)
48.6 (1715)
59.0 (2082)
44.5 (1570)
55.3 (1951)
48.6 (1715)
59.0 (2082)
45.2 (1595)
56.0 (1976)
48.6 (1715)
59.0 (2082)
45.2 (1595)
56.0 (1976)
48.6 (1715)
59.0 (2082)
48.6 (1715)
59.0 (2082)
45.8 (1616)
59.0 (2082)
70.0 (2470)
86.0 (3034)
70.0 (2470)
86.0 (3034)
70.0 (2470)
86.0 (3034)
67.2 (2371)
86.0 (3034)
64.4 (2272)
86.0 (3034)
64.4 (2272)
86.0 (3034)
64.4 (2272)
86.0 (3034)
64.4 (2272)
86.0 (3034)
64.4 (2272)
86.0 (3034)
Factory-
Unit model
charged
amount
EP200YNW
5.2 (184)
EP250YNW
5.2 (184)
EP300YNW
5.2 (184)
EP350YNW
8.0 (283)
EP400YNW
8.0 (283)
EP400YSNW
10.4 (367)
EP450YNW
10.8 (381)
EP450YSNW
10.4 (367)
EP500YNW
10.8 (381)
EP500YSNW
10.4 (367)
EP550YNW
10.8 (381)
EP550YSNW
10.4 (367)
EP600YSNW
10.4 (367)
EP650YSNW
13.2 (466)
EP700YSNW
16.0 (565)
EP750YSNW
16.0 (565)
EP800YSNW
16.0 (565)
EP850YSNW
18.8 (664)
EP900YSNW
21.6 (762)
EP950YSNW
21.6 (762)
EP1000YSNW
21.6 (762)
EP1050YSNW
21.6 (762)
EP1100YSNW
21.6 (762)
37
[kg (oz)]
Maximum
Maximum total
amount to be
amount in the
added on site
system
28.3 (998)
33.5 (1182)
34.3 (1210)
39.5 (1394)
34.3 (1210)
39.5 (1394)
39.0 (1375)
47.0 (1658)
39.0 (1375)
47.0 (1658)
48.6 (1715)
59.0 (2082)
44.7 (1577)
55.5 (1958)
48.6 (1715)
59.0 (2082)
45.2 (1595)
56.0 (1976)
48.6 (1715)
59.0 (2082)
45.2 (1595)
56.0 (1976)
48.6 (1715)
59.0 (2082)
48.6 (1715)
59.0 (2082)
45.8 (1616)
59.0 (2082)
70.0 (2470)
86.0 (3034)
70.0 (2470)
86.0 (3034)
70.0 (2470)
86.0 (3034)
67.2 (2371)
86.0 (3034)
64.4 (2272)
86.0 (3034)
64.4 (2272)
86.0 (3034)
64.4 (2272)
86.0 (3034)
64.4 (2272)
86.0 (3034)
64.4 (2272)
86.0 (3034)
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