Daikin VRV W T-Series Installation Manual page 27

Example of refrigerant piping (8 indoor units are connected)
First outside unit
Outside unit
multi connection
piping kit
r
a
b
A
d
B1
g
e f
D
1 2
Example for refrigerant branch using REFNET joint and REFNET header for systems and each pipe length as shown below.
Outside system: RWEQ264TAYCU (RWEQ144TAYCU+RWEQ120TAYCU)
Total length of liquid piping: 285 ft
Total capacity of indoor unit: 104.5%
Branch Selector units
BS4Q54T×1, BSQ60T×1, BSQ96T×1
Indoor units
FXMQ type: 18×1, 24×2, 36×1, 54×1
FXFQ type: 36×2
Other: 48×1
Liquid piping
a: Ø3/4 × 60 ft e: Ø1/4 × 15 ft
b: Ø5/8 × 20 ft f: Ø3/8 × 10 ft
c: Ø1/2 × 10 ft g: Ø3/8 × 10 ft
d: Ø3/8 × 15 ft h: Ø3/8 × 15 ft
[A]= 0.7×1 + 0.2×1 + 0.4×1 = 1.3 lbs.
BS4Q54T×1 BSQ96T×1
BSQ60T×1
[C]= 0.25×1 + 0.16×2 + 0.25×1 + 0.00×1 + 0.53×2 + 0.00×1 = 1.88 lbs.
FXMQ18×1 FXMQ36×1
FXMQ24×2
[B]= Min (6.61 lbs., 1.88 lbs.) = 1.88 lbs.
R= ( 60×0.175 + 20×0.121 + 35×0.081 + 155×0.040 + 15×0.015 ) × 1.04 + 1.3 + 1.88
a b
= 26.247 ⇒ 26.2 lbs.
Round off in units of 0.1 lbs.
INFORMATION
Piping length is considered by the distance from the
outside unit to the farthest indoor unit.
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
Outside unit
B2
s
REFNET joint (A-E)
c
B
j
B2
k
i
h
3 4 5
i: Ø3/8 × 20 ft m: Ø3/8 × 15 ft
j: Ø3/8 × 10 ft n: Ø3/8 × 15 ft
k: Ø3/8 × 10 ft o: Ø3/8 × 10 ft
ℓ: Ø3/8 × 15 ft p: Ø3/8 × 10 ft
FXFQ36×2
FXMQ54×1 Other48×1
c, r, s d, f, g, h, i, j, e
k, ℓ, m, n, o, p
B1 : Branch Selector unit (multi)
B3 : Branch Selector unit (single)
,
C
B3
m
E
n
6
r: Ø1/2 × 10 ft
s: Ø1/2 × 15 ft
[A] [B]
5 Installation
1 - 7 : Indoor units (cooling/heating
selectable)
8 : Indoor unit (cooling only)
(*3)
p
o
7
8
Installation manual
27