Daikin REYQ96PAYD [12/22] English
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Daikin REYQ96PAYD [12/22] English

Daikin REYQ96PATJ [12/22] English
8 English
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 ~ 120PAYD
REYQ72 ~ 120PATJ
REYQ144 ~ 192PAYD
REYQ144 ~ 192PATJ
7.9 lb
2.2 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
REYQ72 ~ 192PAYD
REYQ72 ~ 192PATJ
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 : REYQ192PAYD
Total capacity of indoor unit : 116%
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.
Note 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 15)
must be increased according to the right table.
(Never inxrease suction gas pipe and HP/LP gas pipe.)
(Refer to figure 15)
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 · 96PA type
REYQ120 · 144PA type
REYQ168 ~ 192PA type
Liquid pipe
φ3/8 → φ1/2
φ1/2 → φ5/8
φ5/8 → φ3/4
R = ( 25 × 0.175 + 1 × 0.121 + 1 × 0.081 + 75 × 0.040 + 10 × 0.015 ) × 1.02 + 2.2 + 1.1
a, b u r c~n, s, t o, p
REYQ192PAYD
116%
= 11.182 11.1lb
Round off in units of 0.1 lb.

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