EDUS391004-N
Installation
Installation of Outdoor Units
101
Required Conditions
Example Dr
a
wings
1.
It is necessar
y to increase the pipe siz
e if the pipe length
betw
een the first br
anch kit and the final br
anch kit is o
ver than
130 ft.
(Reducers m
ust be procured on site)
If the increased pipe siz
e is larger than main pipe siz
e
, then
increase the main pipe siz
e to the same pipe siz
e
.
2. For calculation of Total extension length, the actual length of
above pipes must be doubled.
(except main pipe and the pipes that are not increased)
3.
Indoor unit to the nearest br
anch kit
≤
130 ft.
4.
The diff
erence betw
een
[Outdoor unit to the f
a
rthest indoor unit]
and [Outdoor unit to the nearest indoor unit]
≤
130 ft.
8 b+c+d+e+f+g+p
≤
295 ft.
increase the pipe siz
e of b
, c
, d, e
, f
, g
a+b×2+c×2+d×2+e×2+f×2+g×2
+h+i+j+k+ +m+n+p
≤
3280 ft.
h, i, j.......
p
≤
130 ft.
The f
a
rthest indoor unit 8
The nearest indoor unit 1
(a+b+c+d+e+f+g+p)-(a+h)
≤
130 ft.
Increase the pipe siz
e as f
ollo
ws
φ
3/8
→ φ
1/2
φ
1/2
→ φ
5/8
φ
5/8
→ φ
3/4
φ
3/4
→ φ
7/8
φ
7/8
→ φ
1*
φ
1-1/8
→ φ
1-1/4*
φ
1-3/8
→ φ
1-1/2*
a
AB
C
D
E
F
G
bcd
e
f
g
hi
j
k
m
n
12
34
56
7
8
H1
p
Outdoor unit
REFNET joint (A-G)
Indoor units ( 1 - 8 )
How to calculate the
additional refrigerant
to be charged
[HEAT RECOVER SYSTEM]
Additional refrigerant to
be charged : R(lb)
R should be rounded
off in units of 0.1 lb.
R =
(Total length (ft)
of liquid piping
size at
φ
7/8)
(Total length (ft)
of liquid piping
size at
φ
5/8)
(Total length (ft)
of liquid piping
size at
φ
3/8)
(Total length (ft)
of liquid piping
size at
φ
3/4)
(Total length (ft)
of liquid piping
size at
φ
1/2)
(Total length (ft)
of liquid piping
size at
φ
1/4)
0.249
0.121
0.040
0.175
0.081
0.015
1.02
Example for refrigerant branch using REFNET joint and REFNET header for systems and each pipe length as shown below.
Outdoor system : REYQ240PBYD
Total capacity of indoor unit : 116%
R
=
(
25 × 0.175 + 1 × 0.121 + 1 × 0.081 + 75 × 0.040 + 10 × 0.015 ) × 1.02 + 3.3 + 1.1
a :
φ
3/4 × 15ft.
b :
φ
3/4 × 10ft.
c :
φ
3/8 × 5ft.
d :
φ
3/8 × 5ft.
e :
φ
3/8 × 5ft.
f :
φ
3/8 × 5ft.
g :
φ
3/8 × 5ft.
h :
φ
3/8 × 5ft.
i :
φ
3/8 × 5ft.
j :
φ
3/8 × 5ft.
k :
φ
3/8 × 10ft.
:
φ
3/8 × 10ft.
m :
φ
3/8 × 10ft.
n :
φ
3/8 × 5ft.
o :
φ
1/4 × 5ft.
p :
φ
1/4 × 5ft.
r :
φ
1/2 × 1ft.
s :
φ
3/8 × 1ft.
t :
φ
3/8 × 1ft.
u :
φ
5/8 × 1ft.
a, b
u
r
c~n, s, t
o, p
REYQ240PBYD
116%
= 12.282
12.3 lb
Round off in units of 0.1 lb.
Note 1.
When the equivalent pipe length between outdoor and indoor units is 295 ft or more,
the size of main pipes on the liquid side (refer to figure 16)
must be increased according to the right table.
(Never increase suction gas pipe and HP/LP gas pipe.)
(Refer to figure 16)
1.Outdoor unit
2.Main pipes
3.Increase only liquid pipe size
4.First refrigerant branch kit
5.BS unit
6.Indoor unit
Note 2.
Allowable length after the first refrigerant branch kit to indoor units is 130 ft or less, however it can be extended up to 295
ft if all the following conditions are satisfied. (In case of “Branch with REFNET joint”)
System
REYQ72 · 96P type
REYQ120 · 144P type
REYQ168 ~ 240P type
REYQ264 ~ 336P type
Liquid pipe
φ
3/8
→
φ
1/2
φ
1/2
→
φ
5/8
φ
5/8
→
φ
3/4
φ
3/4
→
φ
7/8
HEAT RECOVERY SYSTEM
MODEL NAME
MODEL NAME
THE AMOUNT OF
REFRIGERANT
REYQ144PBYD
REYQ168 ~ 192P
REYQ216 ~ 240P
REYQ264 ~ 288P
REYQ312 ~ 336P
2.2 lb
3.3 lb
5.5 lb
6.6 lb
REFRIGERANT AMOUNT FOR EXCEEDINGCONNECTION
CAPACITY OF INDOOR UNIT
INDOOR
CONNECTION
CAPACITY
MORE THAN 100%
120% OR LESS
MORE THAN 120%
130% OR LESS
REYQ144 ~ 312PBYD
REYQ168 ~ 312PBTJ
1.1 lb
REYQ336PBYD
REYQ336PBTJ
2.2 lb
1.1 lb
3P215731-11R
*If
the
in
creased
pi
pe size is large
r
than
the
mai
n
pipe
size
, incre
a
se th
e
ma
in pip
e
si
ze
to the same as th
e increase
d
si
ze.
If
the
spe
c
ifi
ed pip
e
dia
m
e
te
r is not avail
abl
e
o
n
site,
d
o
NOT
su
bsti
tu
te
a
pi
pe of greater dia
m
e
te
r.
Summary of Contents for VRV III REMQ72PBYD
Page 1: ...EDUS 391004 N AMERICAS AMERICAS Installation...
Page 24: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 23 1P218719...
Page 25: ...REFNET Pipe System EDUS391004 N 24 Installation of Outdoor Units 1P218720...
Page 26: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 25 1P218720...
Page 28: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 27 1P280278A...
Page 29: ...REFNET Pipe System EDUS391004 N 28 Installation of Outdoor Units 1P280278A...
Page 30: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 29 1P280279...
Page 33: ...REFNET Pipe System EDUS391004 N 32 Installation of Outdoor Units 1P218714...
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Page 35: ...REFNET Pipe System EDUS391004 N 34 Installation of Outdoor Units 1P218715...
Page 36: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 35 1P218715...
Page 38: ...EDUS391004 N REFNET Pipe System Installation of Outdoor Units 37 3D071080...
Page 39: ...REFNET Pipe System EDUS391004 N 38 Installation of Outdoor Units 1P280510A...
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Page 41: ...REFNET Pipe System EDUS391004 N 40 Installation of Outdoor Units 1P280511A...
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Page 113: ...EDUS391004 N Field Setting Installation of Outdoor Units 113 2P281604A...
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