Design and Technical Manual

6. SYSTEM DESIGN
EXAMPLE OF PIPING DESIGN2-6.
EXAMPLE 1

21 3 54 6 87
a b
d
f g h i j k l m
e
c
Outdoor unit
Separation
tube
Branch box Branch box Branch box
Separation
tube
Indoor unit Indoor unitIndoor unit Indoor unit Indoor unitIndoor unit Indoor unit Indoor unit
(7000Btu) (7000Btu)(7000Btu) (7000Btu) (7000Btu)(7000Btu) (7000Btu) (7000Btu)
System conguration
z
(Indoor units)
1 2 3 4 5 6 7 8
Total Capacity
(Btu)
Model name ASU7 ASU7 ASU7 ASU7 ASU7 ASU7 ASU7 ASU7
56000
Capacity (Btu) 7000 7000 7000 7000 7000 7000 7000 7000
Capacity ratio
z
(Total indoor unit capacity) / (Total outdoor unit capacity)
= (56000) / (48000) = 116.7% (Within 80% to 130%)
Selection of separation tube
z
Model Q'ty
UTP-SX248A 2
Selection of branch box
z
Model Q'ty
UTP-PU03A (primary) 1
UTP-PU03B (secondary) 2
Selection of pipe size
z
a b c d e f g
Liquid pipe size
in. (mm)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
1/4
(6.35)
1/4
(6.35)
Gas pipe size
in. (mm)
5/8
(15.88)
5/8
(15.88)
5/8
(15.88)
5/8
(15.88)
5/8
(15.88)
3/8
(9.52)
3/8
(9.52)
Pipe length
ft (m)
23
(7)
33
(10)
33
(10)
16
(5)
16
(5)
16
(5)
16
(5)
h i j k l m
Liquid pipe size
in. (mm)
1/4
(6.35)
1/4
(6.35)
1/4
(6.35)
1/4
(6.35)
1/4
(6.35)
1/4
(6.35)
Gas pipe size
in. (mm)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
3/8
(9.52)
Pipe length
ft (m)
16
(5)
16
(5)
16
(5)
16
(5)
16
(5)
26
(8)
- (06 - 18) -
SYSTEM DESIGN SYSTEM DESIGN