Design Technical Manual

Table Of Contents
z
Selection of branch kit
Branch kit
No.
Total cooling
capacity of
downstream indoor
units (kBtu/h)
Model
DX1 - UTP-DX567A
DX2 - UTP-DX567A
BX1
348.0
UTP-BX567A
AX1
355.5
UTP-A X567A
AX2
264.0
UTP-A X567A
AX3
240.0
UTP-A X567A
AX4
84.0
UTP-AX090A
AX5
24.0
UTP-AX090A
HD1
192.0
UTP-J1806A
z
Selection of RB unit
RB unit
No.
Total cooling
capacity of
downstream indoor
units (kBtu/h)
Model
RB1 48.0 UTP-RU01BH
RB2 48.0 UTP-RU01BH
RB3 48.0 UTP-RU01BH
RB4 48.0 UTP-RU01BH
z
Selection of pipe size
1) 3pipes
3a 3b 3c 3d 3e 3f 3g 3h 3i 3j
Liquid pipe
in. (mm)
1/2
(12.70)
1/2
(12.70)
1/2
(12.70)
5/8
(15.88)
3/4
(19.05)
3/4
(19.05)
5/8
(15.88)
5/8
(15.88)
5/8
(15.88)
1/2
(12.70)
Discharge
gas pipe
in. (mm)
3/4
(19.05)
3/4
(19.05)
3/4
(19.05)
7/8
(22.22)
1-1/8
(28.58)
7/8
(*2)
(22.22)
1-1/8
(28.58)
7/8
(*2)
(22.22)
1-1/8
(28.58)
3/4
(*2)
(
19.05)
1-1/8
(28.58)
3/4
(*2)
(
19.05)
7/8
(22.22)
3/4
(*2)
(
19.05)
3/4
19.05
1/2
(*2)
(12.70)
Suction gas
pipe
in. (mm)
7/8
(22.22)
7/8
(22.22)
7/8
(22.22)
1-1/8
(28.58)
1-3/8
(34.92)
1-5/8
(41.27)
1-3/8
(*1)
(34.92)
1-3/8
(34.92)
1-3/8
(34.92)
1-1/8
(28.58)
7/8
(22.22)
Length ft. (m)
Example
6
(2)
6
(2)
6
(2)
6
(2)
164
(50)
33
(10)
33
(10)
16
(5)
16
(5)
16
(5)
3k 3l 3m 3n
Liquid pipe
in. (mm)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
Discharge
gas pipe
in. (mm)
1/2
(12.70)
1/2
(12.70)
1/2
(12.70)
1/2
(12.70)
Suction gas
pipe
in. (mm)
3/4
(19.05)
3/4
(19.05)
3/4
(19.05)
3/4
(19.05)
Length ft. (m)
Example
10
(3)
10
(3)
10
(3)
10
(3)
*1: Pipe size "3f" selection : Even though this pipe size might be selected based on downstream
cooling capacity (348.0kBtu/h), This pipe size should not be larger than pipe size "3e". Therefore
select pipe size equal to pipe size "3e".
*2: Discharge gas pipe size selection :

When indoor unit of cooling only type is connected, it calculates with the value except
capacity of cooling only type. (except pipe size "3e")

Pipe diameter, in case of discharge gas pipe is not separated, is di󰀨erent between pipes
which come from outdoor unit side and connected to RB unit, Thinner piping diameter should
be selected.
Model Q'ty
UTP-DX567A 2
UTP-BX567A 1
UTP-A X567A 3
UTP-AX090A 2
UTP-J1806A 1
Model Q'ty
UTP-RU01BH 4
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SYSTEM
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SYSTEM
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