Daikin RXYQ240PYDN [549/567] Indoor units 1 8
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Daikin RXYQ240PYDN [549/567] Indoor units 1 8

Daikin RXYQ240PYDN [549/567] Indoor units 1 8
534
a
Required Conditions Example Drawings
1. It is necessay to increase the pipe size between the first branch
kit and the final branch kit. (Reducers must be procured on site)
However, the pipes that are same pipe size with main pipe must
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 branch kit ≤ 130 ft.
4. The difference between
[Outside unit to the farthest 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 size 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 farthest indoor unit 8
The nearest indoor unit 1
(a+b+c+d+e+f+g+p)-(a+h)≤ 130 ft.
Increase the pipe size as follows
φ3/8 → φ1/2
φ1/2 → φ5/8
φ5/8 → φ3/4
φ3/4 → φ7/8
φ7/8 → φ1*
φ1-1/8 → φ1-1/4*
φ1-3/8 → φ1-1/2*
a
ABCDEFG
bcdef
g
hi j kl mn
1234567
8
H1
p
Outside unit
REFNET joint (A-G)
Indoor units ( 1 - 8 )
*
If available on the site, use this size. Otherwise it can not be increased.
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 φ7/8)
(Total length (ft)
of liquid piping
size at φ5/8)
(Total length (ft)
of liquid piping
size at φ3/8)
(Total length (ft)
of liquid piping
size at φ3/4)
(Total length (ft)
of liquid piping
size at φ1/2)
(Total length (ft)
of liquid piping
size at φ1/4)
0.249
0.121
0.040
0.175
0.081
0.015
1.02
HEAT RECOVER SYSTEM
MODEL NAME
THE AMOUNT OF
REFRIGERANT
REYQ72 ~ 120PYDN
REYQ72 ~ 144PTJU
REYQ144 ~ 192PYDN
REYQ168~ 192PTJU
REYQ216 ~ 240PYDN
REYQ216 ~ 240PTJU
REFRIGERANT AMOUNT FOR EXCEEDING
CONNECTION CAPACITY OF INDOOR UNIT
MORE THAN 100%
120% OR LESS
MORE THAN 120%
130% OR LESS
INDOOR CONNECTION
CAPACITY
MODEL NAME
REYQ72 ~ 240PYDN
REYQ72 ~ 240PTJU
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 : REYQ240PYDN
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 : φ3/4 × 15ft.
b : φ3/4 × 10ft.
c : φ3/8 × 5ft.
d : φ3/8 × 5ft.
e : φ3/8 × 5ft.
f : φ3/8 × 5ft.
g : φ3/8 × 5ft.
h : φ3/8 × 5ft.
i : φ3/8 × 5ft.
j : φ3/8 × 5ft.
k : φ3/8 × 10ft.
l : φ3/8 × 10ft.
m : φ3/8 × 10ft.
n : φ3/8 × 5ft.
o : φ1/4 × 5ft.
p : φ1/4 × 5ft.
r : φ1/2 × 1ft.
s : φ3/8 × 1ft.
t : φ3/8 × 1ft.
u : φ5/8 × 1ft.
a, b u r c~n, s, t o, p
REYQ240PYDN
116%
= 12.282 12.3lb
Round off in units of 0.1 lb.
N
ote 1.
When the equivalent pipe length between outside 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 inxrease suction gas pipe and HP/LP gas pipe.)
N
ote 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
Liquid pipe
φ3/8 → φ1/2
φ1/2 → φ5/8
φ5/8 → φ3/4
7.9 lb
2.2 lb
3.3 lb
Outdoor unit
Main pipes
Increase only liquid pipe size
First refrigerant
branch kit
Indoor unit
BS unit

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