Installation manual
[ VIII Test Run Mode ]
- 160 -
HWE10050 GB
3. Amount of refrigerant to be added
The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units.
The amount necessary for extended pipe (field piping) is not included and must be added on site.
(1) Calculation formula
The amount of refrigerant to be added depends on the size and the length of field piping. (unit in m[ft])
Round up the calculation result to the nearest 0.1kg. (Example: 18.04kg to 18.1kg)
Round up the calculation result in increments of 4oz (0.1kg) or round it up to the nearest 1oz. (Example: 78.21oz to 79oz)
Outdoor unit model P200 P250 P300 P350 P400 P450
Amount of pre-charged refrigerant
in the outdoor unit (kg)
9.5 9.5 9.5 11.8 11.8 11.8
Amount of pre-charged refrigerant
in the outdoor unit [lbs-oz]
21-0 21-0 21-0 26-1 26-1 26-1
Outdoor unit model EP200 EP250 EP300 EP350
Amount of pre-charged refrigerant
in the outdoor unit (kg)
9.5 11.8 11.8 11.8
Amount of pre-charged refrigerant
in the outdoor unit [lbs-oz]
21-0 26-1 26-1 26-1
Amount of added refrigerant (kg) = (0.36 x L
1
) + (0.23 x L
2
) + (0.16 x L
3
) + (0.11 x L
4
)+ (0.2 x L
5
)
+ (0.12 x L
6
) + (0.06 x L
7
) + (0.024 x L
8
) + α
1
+ α
2
+ α
3
+ α
4
Amount of added refrigerant (oz) = (3.88 x L
1
' ) + (2.48 x L
2
' ) + (1.73 x L
3
' ) + (1.19 x L
4
' )+ (2.16 x L
5
' )
+ (1.30 x L
6
' ) + (0.65 x L
7
' ) + (0.26 x L
8
' ) + α
1
' + α
2
' + α
3
' + α
4
'
L
1
: Length of ø28.58[1-1/8"] high pressure pipe (m)
L
2
: Length of ø22.2[7/8"] high pressure pipe (m)
L
3
: Length of ø19.05[3/4"] high pressure pipe (m)
L
4
: Length of ø15.88[5/8"] high pressure pipe (m)
L
5
: Length of ø15.88[5/8"] liquid pipe (m)
L
6
: Length of ø12.7[1/2"] liquid pipe (m)
L
7
: Length of ø9.52[3/8"] liquid pipe (m)
L
8
: Length of ø6.35[1/4"] liquid pipe (m)
α
1,
α
2,
α
3,
α
4
, α
1
' , α
2
' , α
3
' , α
4
' : Refer to the table
below.
L
1
' : Length of ø28.58[1-1/8"] high pressure pipe [ft]
L
2
' : Length of ø22.2[7/8"] high pressure pipe [ft]
L
3
' : Length of ø19.05[3/4"] high pressure pipe [ft]
L
4
' : Length of ø15.88[5/8"] high pressure pipe [ft]
L
5
' : Length of ø15.88[5/8"] liquid pipe [ft]
L
6
' : Length of ø12.7[1/2"] liquid pipe [ft]
L
7
' : Length of ø9.52[3/8"] liquid pipe [ft]
L
8
' : Length of ø6.35[1/4"] liquid pipe [ft]
Outdoor unit total
index
Amount for the BC
controllers (main/sub)
BC controller (main)
Total capacity of
connected indoor
units
Amount for the Indoor
unit
α
1
(kg) α
1
' (oz) HA1-type α
2
(kg) α
2
' (oz) α
4
(kg) α
4
' (oz)
(E)P200 model 2.0 71 1 unit 2.0 71 - 80 2.0 71
(E)P250 -
(E)P500 models
3.0 106
81 - 160 2.5 89
161 - 330 3.0 106
(E)P550 - P900
models
5.0 177 BC controller (sub)
331 - 390 3.5 124
391 - 480 4.5 159
Total number of BC α
3
(kg) α
3
' (oz) 481 - 630 5.0 177
1 1.0 35 631 - 710 6.0 212
2 2.0 71 711 - 800 8.0 283
801 - 890 9.0 318
891 - 1070 10.0 353
1071 - 1250 12.0 424
1251 - 14.0 494