38-EN
37-EN
– 1 9 –
Allowable length of refrigerant pipes and allowable height
difference between units
¿
System restriction
Outdoor unit combination
Up to 3 units
Total capacity of outdoor units
Up to 42 HP
Indoor unit connection
Up to 64 units (*1)
Total capacity of indoor units
(varies depending on the height difference between
indoor units.)
H2
≤
15m
135% of outdoor units’ capacity (*2)
15m < H2
105% of outdoor units’ capacity
(*1) : In case without central control.
It is up to 54 units in case with central control.
(*2) : MAP200* : 125%, AP381* : 130%, AP401* : 125%
¿
Cautions for installation
• Set the outdoor unit
fi
rst connected to the bridging pipe to the indoor units as the header unit.
• Install the outdoor units in order of their capacity codes: A (header unit)
≥
B
≥
C
• When connecting gas pipes to indoor units, use Y-shaped branching joints to keep pipes level.
• When piping to outdoor units using Outdoor unit connection piping kits, intersect the pipes to the outdoor unit
and those to indoor units at a right angle as shown in
fi
gure 1 on “6. Installation of the outdoor unit”. Do not
connect them as in
fi
gure 2 on “6. Installation of the outdoor unit”.
L1
LA
La
Lb
Lc
a
b
c
k
l
f
g
h
L3
L5
L6
L7
L8
d
e
m
n
o
(o)
i
j
LO
(m)
(n)
L4
(c)
(b)
(a)
Height
difference
between
outdoor units
H3
Outdoor unit
A
Header
unit
B
Follower
unit
C
Follower unit
Outdoor unit connecting
Outdoor unit connection piping kit
Branching pipe
L2
Branching header
Main piping
L1
Height
difference
between
outdoor and
indoor units:
H1
t
n
i
o
j
g
n
i
h
c
n
a
r
b
d
e
p
a
h
s
-
Y
g
n
i
h
c
n
a
r
b
t
s
r
i
F
Indoor unit connecting pipe
Indoor unit
The longest piping length:
L
The longest piping length from the
Fi
rst branch:
Li
The longest piping length in Flow selector unit group
:
Ln
Flow
Selector
unit
Indoor unit
H4
Height di
fference between indoor units
H2
4
p
q
r
s
t
Multi port type Flow Selector unit
Indoor unit connecting pipe
Y-shaped branching joint
Indoor unit
L9
L11
H5
L10
L12
u
v
H6
L13
Single port type Flow Selector unit
(Long piping model)
AMP Air Conditioning
www.ampair.co.uk | [email protected]
