ENGLISH-42
Classification
Example
Remarks
Maximum
allowable
height
difference
Outdoor unit ~
Indoor unit
Pipe length
50 m /40 m
note 1)
H1 ≤ 50 m / 40 m
Indoor unit ~
Indoor unit
40 m or less H2 ≤ 40 m
Indoor unit ~
Indoor unit
(in one MCU)
15 m or less H3 ≤ 15 m
But, when AM
✴✴✴✴
nQDEH
✴
/ AM
✴✴✴
JnV
✴
is installed, H2
is 15 m or less .
MCU ~ MCU
30 m or less H4 ≤ 30 m
Maximum
allowable
length after
branch joint
First branch
joint ~ Farthest
Indoor unit
Pipe length
45 m or less
Installing only with
MCU
g+j ≤ 45 m
45 ~ 90 m
Note 2)
Installing with
MCU and Y-joint
b+h+k ≤ 45 m
l+p ≤ 45 m
Required conditions must be
satisfied
Distribution kit
Model
Remarks
From distribution kit
to indoor unit
Actual pipe length
2 m or less
MEV-24SA (For 1 indoor unit)
Applied to products without EEV
(wall-mounted)
note 1) If an outdoor unit is located in a lower position than indoor unit, maximum level difference is 40 m . If outdoor unit is
located in a higher position than indoor unit, level difference is 50 m or under .
❋
❋
total refrigerant amount of the system must be less than 100 kg. If total refrigerant amount of system is
over than 100 kg, the system has to be divided into smaller system, each less than 100 kg.
note 2) Required condition
Classification
Condition
Example
First branch joint ~
Farthest Indoor unit
45 m ≤ b, l+m, q ≤ 90 m: Size of the branch pipe (b,
l, m, q) must be increased by 1 grade .
MCU
MCU
MCU
MCU
n
h
m
l
o
p
q
r
Condition of total
length of extended
pipe
a+(bx2) + c + d + e + f + g + h + I + j + k + l + m +
n + o + p + q + r ≤ 500
MCU ~ Each indoor unit
c + d, c + e, c + f, g, h + I, h + j, h + k, n, o, p, r ≤ 45
Difference 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 can not be combined .
ERV plus (AM
✴✴✴
FnKDE
✴✴
), OAP duct(AM
✴✴✴✴
nEPE
✴✴
), 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 can not be combined to more than one .
Refrigerant pipe installation
