ENGLISH-25
0
2
INST
ALLING
THE
PRODUC
T
Selecting Y-joint
f
Select the first Y-joint according to main pipe size of each outdoor unit capacity.
f
Select the other Y-joints according to the total indoor unit capacity under the selected Y-joint.
Selecting the first Y-joint
Outdoor unit capacity [HP(Ton)]
Y-joint model
4 (3)
MXJ-YA1509
✴
5( 4)
MXJ-YA2512
✴
6 (5)
MXJ-YA2512
✴
Other Y-joints
Total indoor unit capacity under the
selected Y-joint [kW (Btu/h)]
Y-joint model
X ≤ 15.0 (51000)
MXJ-YA1509
✴
15.0 (51000) < X ≤ 40.6 (138000)
MXJ-YA2512
✴
Selecting additional refrigerant charging
f
Basic refrigerant
The basic amount of additional refrigerant charged at a factory
Model
Refrigerant
Factory charge
kg
lbs
AM038KXWD
✴
R-410A
1.1
2.425
AM048KXWD
✴
1.6
2.527
AM055KXWD
✴
1.6
2.527
f
Charging additional refrigerant
The amount of additional refrigerant charging
=
The amount of refrigerant charging for pipe +
the amount of refrigerant correction charging for an indoor unit.
1. The amount of additional refrigerant depending on the pipe size (
ⓐ
)
- Amount of additional refrigerant has to be calculated based on the sum of all liquid pipe length.
Size of liquid pipe [mm(inch)]
6.35 (1/4)
9.52 (3/8)
12.7 (1/2)
15.88 (5/8)
Additional amount [kg/m (lb/ft)]
0.02 (0.013)
0.06 (0.040)
0.125 (0.084)
0.18 (0.121)
Additional refrigerant charging calculation = The sum of total length of Ø 9.52 liquid pipe(m) x 60g + the sum of
total length of Ø 6.35 liquid pipe(m) x 20g
Ex) a(Ø 9.52)=40m(131.23’), b+c+d(Ø 9.52)=15m(49.21’), e+f+g(Ø 6.35)=15m(49.21’) Refer to ‘Connection by header
joint’ on page 46.
The amount of additional refrigerant = 55m(180.45’) x 60g + 15m(49.21’) x 20g = 3600g
k}tGzG~Tnlvptluki]_TW[^``hTWZUGGGY\
YWX]TW^TYXGGG㝘䟸GXaWXa[Z
