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ENGLISH
Note 1) When indoor unit is located at higher level than outdoor unit, allowable height dierence is 110m, (If the height
dierence is over 40m, contact your local dealer for more information.) but when the indoor unit is located at lower
level than outdoor unit, allowable height dierence is 110m (If the height dierence is over 50m, need to decide
whether to install PDM kit or not.)
Model name of the PDM kit : MXD-A38K2A, MXD-A12K2A, MXD-A58K2A
Note 2) Required condition
Classication Condition Example
First branch
joint ~ Farthest
Indoor unit
45 m ≤ b+h+k, l+m+q, l+r ≤ 90 m : Size of the branch
liquid and low pressure gas pipes (b, l, m) must be
increased by 1 grade.
MCU
MCU
MCU
o
h
n
H4
H1
H2
H3
pq
r
l
m
Total length of
extended pipe
If the size of pipe (main pipe), between the rst branch
joint and the outdoor unit, is not increased by 1 grade,
a+(b+l+m) x 2+c+d+e+f+g+h+i+j+k+n+o+p+q+r ≤
1000 m
If the size of pipe (main pipe), between the rst branch
joint and the outdoor unit, is increased by 1 grade,
(a+b+l+m) x 2+c+d+e+f+g+h+i+j+k+n+o+p+q+r ≤
1000 m
MCU ~
Each indoor
unit
c+d, c+e, c+f, g, h+i, h+j, h+k, n, o, p, q, r ≤ 45 m
Dierence between the distance of the outdoor unit to the farthest indoor
unit and nearest indoor unit ≤ 45 (a+b+h+k) - (a+b+c+d) ≤ 45
Note 3) For indoor units to which no MCU is connected, be sure to set their options to “Cooling only indoor unit,” and then
connect them to a low pressure gas pipe and a liquid pipe. Be sure to combine the cooling only indoor units so that
their total capacity becomes 50% or less of the total capacity of all indoor units.
Note 4) In case of connecting more than one indoor unit in one MCU Port, the below indoor units cannot be combined.
ERV plus (AM✴✴✴FNKDE✴✴), OAP duct(AM✴✴✴JNEPE✴✴), Hydro Unit HE(AM✴✴✴FNBD✴✴), Hydro Unit
HT(AM✴✴✴FNBF✴✴), AHU kit (MXD-K✴✴✴AN, MCM-D✴✴✴N)
Note 5) In case of connecting two MCU ports with Y-joint, the indoor units cannot be combined to more than one.
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