10
MZ series
10
Allowable Length and Height Fall of the Refrigerant Pipe
Table 7
b
a
e
d
c
L4
L3
L2
L5
L1
Outdoor unit
H
ei
ght
di
ffe
ren
ce
be
tw
ee
n
ind
oo
ru
ni
ta
nd
out
do
or
un
it
H
1
H
ei
ght
di
ffer
enc
e
bet
w
ee
n
in
do
or
un
its
H
2
Indoor unit
Indoor unit
Equivalent length of the farthest fitting pipe L
x
Fig 8
4.2.3 Installation of the Protection Layer of the Refrigerant Pipe
(1)The refrigerant pipe should be insulated by the insulating material and plastic tape in order to prevent
condensation and water leakage.
(2)The joints of the indoor unit should be wrapped with the insulating material and no gap is allowed on the joint
of the indoor unit, as shown in Fig.9.
Thermal insulating layer is required to be wrapped at this part.
Thermal insulating pipe
No gap
Fig 9
Allowable Value
FGH-42ES-MZ
Fitting Pipe
Total length (actual length) of fitting
pipe
246.1ft
L
1
+L
2
+…+L
M
(M
≤
5)
Length of farthest fitting pipe (ft)
82ft
L
X
（
X=1
，
2
，
3
，
4,5
）
Height difference
between outdoor
unit and indoor unit
Outdoor unit at
upper
49.2ft
H1
Outdoor unit at
lower
49.2ft
H3
Height difference between indoor
units (m)
24.6ft
H2
