Mitsubishi PUHY-EP250 - The Amount of Refrigerant to be Added

[6-9 Evaluating and Adjusting Refrigerant Charge ]
- 122 -
HWE12050 GB
6-9-3 The 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: 178.21oz to 179oz)
Outdoor unit model EP200 EP250 EP300 EP350 EP400 EP450
Amount of pre-charged refrigerant in
the outdoor unit (kg)
9.0 11.5 11.8 11.8 11.8 11.8
Amount of pre-charged refrigerant in
the outdoor unit [lbs-oz]
19-13 25-9 26-1 26-1 26-1 26-1
Amount of added refrigerant (kg) = (0.29x L
1
) + (0.2 x L
2
) + (0.12 x L
3
) + (0.06 x L
4
) + (0.024 x L
5
) + + 
Amount of added refrigerant (oz) = (3.12x L
1
' ) +(2.15 x L
2
' ) + (1.29 x L
3
' ) + (0.65 x L
4
' ) + (0.26 x L
5
' ) + '+ '
L
1
: Length of ø19.05 [3/4"] liquid pipe (m)
L
2
: Length of ø15.88 [5/8"] liquid pipe (m)
L
3
: Length of ø12.7 [1/2"] liquid pipe (m)
L
4
: Length of ø9.52 [3/8"] liquid pipe (m)
L
5
: Length of ø6.35 [1/4"] liquid pipe (m)
, ': Refer to the table below.
L
1
': Length of ø19.05 [3/4"] liquid pipe [ft]
L
2
': Length of ø15.88 [5/8"] liquid pipe [ft]
L
3
': Length of ø12.7 [1/2"] liquid pipe [ft]
L
4
': Length of ø9.52 [3/8"] liquid pipe [ft]
L
5
': Length of ø6.35 [1/4"] liquid pipe[ft]
, ': Refer to the table below.
Total capacity of
connected indoor units  (kg) ' (oz)
Outdoor unit total index
Amount of refrigerant
to be charged to out-
door units on site
-80 2.0 71  (kg) ' (oz)
81 - 160 2.5 89
Single
(YKM)
EP200 model 0.0 0
161 - 330 3.0 106 EP250 model 2.0 71
331 - 390 3.5 124 EP300 model 8.0 283
391 - 480 4.5 159 EP350 - EP450 models 8.0 283
481 - 630 5.0 177
Combina-
tion
(YSKM)
EP400 model 0.0 0
631 - 710 6.0 212 EP450 model 2.0 71
711 - 800 8.0 283 EP500 model 8.0 283
801 - 890 9.0 318 EP550 model 10.0 353
891 - 1070 10.0 353 EP600 model 16.0 565
1071 - 1250 12.0 424 EP650 model 2.0 71
1251 - 14.0 494 EP700 model 8.0 283
EP750 model 10.0 353
EP800 model 16.0 565
EP850 model 18.0 635
EP900 model 24.0 847