Installation Manual
13
Installation of Indoor, Outdoor Unit
Distributor Piping Type
h1
C
Branch Pipe
Main Pipe
Distributor
Distributor
A
B
h2
Unit : m(ft)
Outdoor Unit
Capacity
(kBtu/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
Elevation
Between
indoor
(h2)
Max
Combination
of indoor
unit (kBtu/h
class)
48
145(476)
55(180)
90(295)
15(49)
3(10)
30(98)
15(49)
65
54
145(476)
55(180)
90(295)
15(49)
3(10)
30(98)
15(49)
73
60
145(476)
55(180)
90(295)
15(49)
3(10)
30(98)
15(49)
83
ENGLISH
Indoor unit Capacity (kBtu/h class)
Pipe Diameter
Unit : mm(inch)
Gas
Liquid
7, 9, 12, 15
9.52(3/8)
6.35(1/4)
15(Console), 18, 24
12.7(1/2)
6.35(1/4)
36
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 24 k high static ducted unit/VAHU AND ONE 24 k high static ducted unit/VAHU
2) ONE 24 k high static ducted unit/VAHU AND ONE 36 k high static ducted unit/VAHU
CAUTION
Capacity is based on standard
length and maximum allowance length is on the basis of reliability.
!
