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Installation Manual 13
Installation of Indoor, Outdoor Unit
Distributor Piping Type
h1
C
Branch Pipe
Main Pipe
Distributor
Distributor
A
B
h2
CAUTION: Capacity is based on standard length and maximum allowance
length is on the basis of reliability.
Unit : m(ft)
Outdoor Unit
Capacity
(Btu/h class)
Max total length
of all pipes
(Main + Branch
pipes)
Max length
of
Main pipe
(A+B+C)
Max length
of
Branch
pipes
Max length
of each
Branch pipe
Min length of
each pipe
(Main /
Branch
pipes)
Max Elevation
Between each
indoor unit and
outdoor unit
(h1)
Max Eleva-
tion
Between in-
door
(h2)
Max Combi-
nation
of indoor
unit
48k 145(476) 55(180) 90(295) 15(49) 3(10) 30(98) 15(49) 65k
54k 145(476) 55(180) 90(295) 15(49) 3(10) 30(98) 15(49) 73k
60k 145(476) 55(180) 90(295) 15(49) 3(10) 30(98) 15(49) 83k
ENGLISH
Indoor unit Capacity (Btu/h class)
Pipe Diameter
Unit : mm(inch)
Gas Liquid
7, 9, 12, 15k 9.52(3/8) 6.35(1/4)
18, 24k 12.7(1/2) 6.35(1/4)
36k 15.88(5/8) 9.52(3/8)
Calculation method for total capacity index = sum up the capacity index of connected indoor units.
h Total capacity index = [Sum of all VAHU & Ceiling Concealed Duct (High Static) type indoor units capacity (if
any)] x 1.3 + Sum of all other indoor unit’s capacity
h The multiplier(1.3) is only necessary for calculation of combination ratio.
h For combinations where it contains one of below conditions, multiplier is 1.2 instead of 1.3. (See example 3)
1) ONE 24k high static ducted unit/VAHU AND ONE 24k high static ducted unit/VAHU
2) ONE 24k high static ducted unit/VAHU AND ONE 36K high static ducted unit/VAHU
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