11
en
4.4. Additional refrigerant charge
Notes:
•
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.
* R32 refrigerant is charged in the (E)M200–500YNW model of units, and R410A
refrigerant is charged in the (E)P200–500YNW model of units.
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.
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).
•
The refrigerant does not need to be added for the indoor units in a Hybrid
City Multi system.
■
(E)M200 to 500YNW (R32 refrigerant)
(1) Units "m" and "kg"
<Formula>
•
When the piping length from the outdoor unit to the farthest HBC controller is
10 m (32 ft) or shorter
•
When the piping length from the outdoor unit to the farthest HBC controller is
longer than 10 m (32 ft)
<Example>
Outdoor unit model: PURY-EM300YNW-A1
Main HBC controller 1 model: CMB-WM108V-AA
Main HBC controller 2 model: CMB-WM108V-AA
Sub HBC controller model: CMB-WM108V-AB
* Refer to the pipe connection examples in Fig.2.4.2 (P.2).
A
1
: ø15.88; 18 m
A
2
: ø15.88; 5 m
A
3
: ø15.88; 10 m
B: ø15.88; 8 m
The total length of the high-pressure piping and liquid piping in each case is as fol-
lows:
ø15.88 total length: 18 (A
1
)
ø15.88 total length: 5 (A
2
) + 10 (A
3
) + 8 (B) = 23
Therefore, when the piping length from the outdoor unit to the farthest HBC con-
troller is longer than 10 m (32 ft),
[kg (oz)]
Unit model
Factory-charged
amount
Maximum amount to
be added on site
Maximum total
amount in the system
M200YNW
5.2 (184)
13.5 (477)
18.7 (660)
M250YNW
5.2 (184)
13.5 (477)
18.7 (660)
M300YNW
5.2 (184)
15.5 (547)
20.7 (731)
M350YNW
8.0 (283)
15.5 (547)
23.5 (829)
M400YNW
8.0 (283)
19.5 (688)
27.5 (971)
M450YNW
10.8 (381)
19.5 (688)
30.3 (1069)
M500YNW
10.8 (381)
19.5 (688)
30.3 (1069)
Unit model
Factory-charged
amount
Maximum amount to
be added on site
Maximum total
amount in the system
EM200YNW
5.2 (184)
13.5 (477)
18.7 (660)
EM250YNW
5.2 (184)
13.5 (477)
18.7 (660)
EM300YNW
5.2 (184)
15.5 (547)
20.7 (731)
EM350YNW
8.0 (283)
15.5 (547)
23.5 (829)
EM400YNW
8.0 (283)
19.5 (688)
27.5 (971)
EM450YNW
10.8 (381)
19.5 (688)
30.3 (1069)
EM500YNW
10.8 (381)
19.5 (688)
30.3 (1069)
Unit model
Factory-charged
amount
Maximum amount to
be added on site
Maximum total
amount in the system
P200YNW
5.2 (184)
31.8 (1122)
37.0 (1306)
P250YNW
5.2 (184)
37.8 (1333)
43.0 (1517)
P300YNW
5.2 (184)
37.8 (1333)
43.0 (1517)
P350YNW
8.0 (283)
41.3 (1457)
49.3 (1740)
P400YNW
8.0 (283)
47.3 (1668)
55.3 (1951)
P450YNW
10.8 (381)
44.5 (1570)
55.3 (1951)
P500YNW
10.8 (381)
45.2 (1595)
56.0 (1976)
Unit model
Factory-charged
amount
Maximum amount to
be added on site
Maximum total
amount in the system
EP200YNW
5.2 (184)
28.3 (998)
33.5 (1182)
EP250YNW
5.2 (184)
34.3 (1210)
39.5 (1394)
EP300YNW
5.2 (184)
34.3 (1210)
39.5 (1394)
EP350YNW
8.0 (283)
39.0 (1375)
47.0 (1658)
EP400YNW
8.0 (283)
39.0 (1375)
47.0 (1658)
EP450YNW
10.8 (381)
44.7 (1577)
55.5 (1958)
EP500YNW
10.8 (381)
45.2 (1595)
56.0 (1976)
Amount of
additional
charge (kg)
=
High-pressure pipe
ø22.2 total length
× 0.23 (kg/m)
+
High-pressure pipe
ø19.05 total length
× 0.16 (kg/m)
+
High-pressure pipe
ø15.88 total length
× 0.11 (kg/m)
+
Outdoor unit model
Amount (kg)
+
Amount
(kg/HBC controller)
(E)M200
1.0
2.8
(E)M250
1.0
(E)M300
0
(E)M350
0
(E)M400
0
(E)M450
0
(E)M500
0
* Amount of refrigerant to be charged for
single-module units
Amount of
additional
charge (kg)
=
High-pressure pipe
ø22.2 total length
× 0.19 (kg/m)
+
High-pressure pipe
ø19.05 total length
× 0.13 (kg/m)
+
High-pressure pipe
ø15.88 total length
× 0.09 (kg/m)
+
Outdoor unit model
Amount (kg)
+
Amount
(kg/HBC controller)
(E)M200
1.0
2.8
(E)M250
1.0
(E)M300
0
(E)M350
0
(E)M400
0
(E)M450
0
(E)M500
0
* Amount of refrigerant to be charged for
single-module units
Amount of additional charge = (41 × 0.09) + 2.8 × 2
= 9.3 kg (Fractions are rounded up.)
01_WT08892X03_en.book 11 ページ ２０１９年４月１６日 火曜日 午後３時１２分
