Daikin RXYQ120PYDN, Installation Manual

Page: 14 / 25

10 English
Required Conditions
Example Dr
a
wings
1.
It is necessa
y to increase the pipe siz
e betw
een the first br
anch
kit and the final br
anch kit.
(Reducers m
ust be procured on site)
Ho
w
e
ve
r,
the pipes that are same pipe siz
e with main pipe m
ust
not be increased
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
[Outside unit to the f
a
rthest indoor unit]
and [Outside 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+l+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
l
m
n
12
34
56
7
8
H1
p
Outside unit
REFNET joint (A-G)
Indoor units ( 1 - 8 )
*If a
vailab
le on the site
, use this siz
e
. Otherwise it can not be increased.
How to calculate the additional refrigerant to be charged
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
HEAT PUMP SYSTEM
MODEL NAME
THE AMOUNT OF
REFRIGERANT
RXYQ72 ~ 120PYDN RXYQ144 ~ 192PYDN RXYQ216 ~ 240PYDN
—
2.2 lb 3.3 lb
REFRIGERANT AMOUNT FOR EXCEEDING CONNECTION CAPACITY OF INDOOR UNIT INDOOR CONNECTION CAPACITY MORE THAN 100% 120% OR LESS MORE THAN 120% 130% OR LESS
MODEL NAME
RXYQ72 ~ 240PYDN
1.1 lb 1.1 lb
Example for refrigerant branch using REFNET joint and REFNET heder for systems and each pipe length as shown below.
Outside system : RXYQ240PYDN Total capacity of indoor unit : 116%
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.
l :
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.
Note 1.
When the equivalent pipe length between outside and indoor units is 295 ft or more, the size of main pipes (both gas side and liquid side (refer to figure 9) must be increased according to the right table. (Refer to figure 9) 1.Outdoor unit 2.Main pipes 3.Increase 4.First refrigerant branch kit 5.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
RXYQ72P type RXYQ96P type
RXYQ120P type RXYQ144P type RXYQ168P type RXYQ192P type RXYQ216P type RXYQ240P type
Gas pipe
φ
3/4
→
φ
7/8
φ
7/8
→
φ
1
Not Increased
φ
1-1/8
→
φ
1-1/4
φ
1-1/8
→
φ
1-1/4
φ
1-1/8
→
φ
1-1/4
φ
1-1/8
→
φ
1-1/4
Not Increased
Liquid pipe
φ
3/8
→
φ
1/2
φ
3/8
→
φ
1/2
φ
1/2
→
φ
5/8
φ
1/2
→
φ
5/8
φ
5/8
→
φ
3/4
φ
5/8
→
φ
3/4
φ
5/8
→
φ
3/4
φ
5/8
→
φ
3/4
R
=
(
25 × 0.175 + 1 × 0.121 + 1 × 0.081 + 75 × 0.040 + 10 × 0.015 ) + 3.3 + 1.1
a, b
u
r
c~n, s, t
o, p
RXYQ240PYDN
116%
= 12.127
12.1lb
Round off in units of 0.1 lb.
01_EN_3P215731-2.fm Page 10 Tuesday, December 4, 2007 12:04 PM