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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 amount of refrigerant that is shown in the table below is factory-charged in the outdoor units. The amount necessary for extended piping is not
included and needs to be added on site.
Unit model
H072
H096
H120
The amount of refrigerant that is shown in the table below is the maximum amount to be added on site.
Unit model
Maximum amount to be added [kg (oz)]
H072
H096
H120
H144
H192
H240
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).
(1) Units "m" and "kg" (In an R2 system)
<Formula>
・When the piping length from the outdoor unit to the farthest indoor unit is 30.5 m (100 ft) or shorter
Amount of
High-pressure pipe ø28.58
additional charge
=
total length × 0.36 (kg/m)
(kg)
Liquid pipe ø12.7 total
+
length × 0.12 (kg/m)
Main or sub BC
controller
J-type
+
JA-type
KA-type
KB-type
* In the case all connected indoor unit models are Case 1 or Case 2, do NOT add the refrigerant listed in table Ⓐ. Instead, add the following
amount of refrigerant.
Case 1: TPLFYP006/018/036EM14**
→ Add 0.67 kg per TPLFYP006/018/036EM14**.
Case 2: TPEFYP006/024/036MA14**
→ Add 0.55 kg per TPEFYP006/024/036MA14**.
WT09117X05
Factory-charged amount [kg (oz)]
8.0 (283)
10.8 (381)
10.8 (381)
25.5 (900)
30.7 (1083)
36.7 (1295)
42.5 (1500)
52.4 (1849)
68.4 (2413)
High-pressure pipe ø22.2
+
total length × 0.23 (kg/m)
Liquid pipe ø9.52 total
+
length × 0.06 (kg/m)
Amount (kg/unit)
connected indoor units
1.5
3.0
4.7
0.4
+
High-pressure pipe ø19.05
+
total length × 0.16 (kg/m)
Liquid pipe ø6.35 total
+
length × 0.024 (kg/m)
Amount (kg)
Total capacity of
(to be added for
indoor unit)
27 or below
2.0
28 to 54
2.5
55 to 126
3.0
127 to 144
3.5
145 to 180
4.5
181 to 234
5.0
235 to 273
6.0
274 to 307
8.0
308 to 342
9.0
343 to 411
10.0
412 to 450
12.0
451 or above
14.0
GB-26
High-pressure pipe ø15.88
Liquid pipe ø15.88 total
+
+
total length × 0.11 (kg/m)
length × 0.2 (kg/m)
Ⓐ
Total capacity of
outdoor units
072
096
120
144
168
+
192
216
240
264
288
312
336
Amount (kg)
1.5
1.5
3.0
2.5
4.0
4.0
4.5
5.0
2.5
1.5
2.0
2.0
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