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One o
u
tdoor
u
nit installed
Branch
w
ith REF
N
ET joint
Branch
w
ith REF
N
ET joint and REF
N
ET header
Branch
w
ith REF
N
ET header
O
u
tdoor
u
nit
O
u
tdoor
u
nit
H3
H3
O
u
tdoor
u
nit
First o
u
tdoor
b
ranch
H3
O
u
tdoor
u
nit
M
u
ltiple
o
u
tdoor
u
nits
installed
Maxim
u
m
allo
w
a
b
le
length
Bet
w
een o
u
tdoor
and indoor
u
nits
Bet
w
een o
u
tdoor
b
ranch and o
u
tdoor
u
nit
(Only for m
u
ltiple o
u
tdoor
u
nits)
Bet
w
een o
u
tdoor and indoor
u
nits
Bet
w
een indoor and indoor
u
nits
Bet
w
een o
u
tdoor and o
u
tdoor
u
nits
Act
u
al pipe length
Act
u
al pipe length
Act
u
al pipe length
Difference in height
Difference in height
Difference in height
E
qu
i
v
alent length
Total extension length
Pipe length
b
et
w
een o
u
tdoor and indoor
u
nits
≤
492ft.
Example
u
nit
8
: a +
b
+ c + d + e + s
≤
492ft.
Example
u
nit
8
: a +
b
+ c + d + e +s 130ft.
E
qu
i
v
alent pipe length
b
et
w
een o
u
tdoor and indoor
u
nits
≤
492ft. (ass
u
me e
qu
i
v
alent pipe length of REF
N
ET joint to
b
e 1.6ft., that of REF
N
ET header to
b
e 3.3ft., that of BS
V
Q36, 60 to
b
e 13ft. calc
u
lation p
u
rposes)
Piping length from o
u
tdoor
b
ranch to o
u
tdoor
u
nit
£
33ft. E
qu
i
v
alent length: max 43ft.
Difference in height
b
et
w
een o
u
tdoor and indoor
u
nits (H1)
£
164ft. (Max 130ft. if the o
u
tdoor
u
nit is
b
elo
w
)
Difference in height
b
et
w
een adjacent indoor
u
nits (H2)
£
49ft.
Difference in height
b
et
w
een o
u
tdoor
u
nit (main) and o
u
tdoor
u
nit (s
ub
) (H3)
£
16ft.
Pipe length from first refrigerant
b
ranch kit (either REF
N
ET joint or REF
N
ET header ) to indoor
u
nit
£
130ft.
Total piping length from o
u
tdoor
u
nit* to all indoor
u
nits
≤
575ft.
Allo
w
a
b
le
height
length
Allo
w
a
b
le length after the
b
ranch
Refrigerant
b
ranch kit selection
Pipe size selection
Example
u
nit
8
: a + o
≤
492ft.
Example
u
nit 6: a +
b
+ l
≤
492ft..,
u
nit
8
: a + m + n + p
≤
492ft.
Example
u
nit
8
: o
£
≤
130ft.
Example
u
nit 6:
b
+ l
£
130ft.,
u
nit
8
:m + n + p
£
130ft.
r
t
O
u
tdoor
u
nit
r
≤
33ft. (E
qu
i
v
a
q
lent length: max 43ft.)
t
≤
33ft. (E
qu
i
v
a
q
lent length: max 43ft.)
Refrigerant
b
ranch kits can only
b
e
u
sed
w
ith R-410A.
Piping from BS
u
nit to indoor
u
nit and piping from
refrigerant
b
ranch kit to indoor
u
nit
u
sed as cooling only
m
u
st
b
e composed
b
y 2 pipes (S
u
ction Gas pipe and
Li
qu
id pipe)
*If case of m
u
ltiple o
u
tdoor
u
nits installed, re-read to the
first o
u
tdoor
b
ranch as seen from the indoor
u
nit.
Ho
w
to select the REF
N
ET joint
•
W
hen
u
sing REF
N
ET joint at the first
b
ranch co
u
nted from the o
u
tdoor
u
nit side, choose from the follo
w
ing ta
b
le in
accordance
w
ith the capacity of the o
u
tdoor
u
nit.
For an o
u
tdoor
u
nit m
u
lti installation, make the settings in
accordance
w
ith the follo
w
ing fig
u
re.
Ho
w
to calc
u
late the additional refrigerant
to
b
e charged
If a negati
v
e res
u
lt is gotten for R from the form
u
la at right,
no refrigerant needs to
b
e added.
Additional refrigerant to
b
e charged R (l
b
.)
R sho
u
ld
b
e ro
u
nded off in
u
nits of 0.1(l
b
.).
Piping
b
et
w
een o
u
tdoor
b
ranch
and o
u
tdoor
u
nit (part B)
Oil-e
qu
alizing line (part C)
Piping
b
et
w
een o
u
tdoor
u
nits and refrigerant
b
ranch kit (part A)
REYQ72/96
REYQ144/16
8
/192
KHRP25M33T
KHRP25M72TU
• For REF
N
ET joint other than the first
b
ranch, select the proper
b
ranch kit model
b
ased on the total capacity
index.
< 72
72
≤
x< 111
111
≤
KHRP25M22T
KHRP25M33T
KHRP25M72TU
KHRP26M22T
KHRP26M33T
KHRP26M72TU
< 72
72
≤
x< 111
111
≤
KHRP25M33H
KHRP25M72H
KHRP26M22H or KHRP26M33H
KHRP26M33H
KHRP26M72H
In case of m
u
ltiple o
u
tdoor
u
nits installed,
u
se o
u
tdoor
b
ranch kit.
2
u
nits
BHFP26M90U
example in case of REF
N
ET joint C; indoor
u
nits 5 + 6 + 7 +
8
example in case of REF
N
ET joint B indoor
u
nits 7 +
8
,
example in case of REF
N
ET header; indoor
u
nits 1 + 2 + 3 + 4 + 5 + 6
example in the case of REF
N
ET header; indoor
u
nits 1 + 2 + 3 + 4 + 5 + 6 + 7 +
8
Example of do
w
nstream indoor
u
nits
a:
φ
3/4 × 100ft.
b
:
φ
5/
8
× 30ft.
c:
φ
3/
8
× 30ft.
d:
φ
3/
8
× 30ft.
e:
φ
3/
8
× 30ft.
f :
φ
3/
8
× 30ft.
g:
φ
3/
8
1/4 × 30ft.
h:
φ
3/
8
1/4 × 70ft.
i :
φ
1/2 × 30ft.
j :
φ
1/4 × 30ft.
k:
φ
1/4 × 25ft.
R=
+
indoor capacity index
Refrigerant
b
ranch kit name
Nu
m
b
er of o
u
tdoor
u
nits
Branch kit name
O
u
tdoor
u
nit capacity type
Refrigerant
b
ranch kit name
indoor capacity index
Refrigerant
b
ranch kit name
In case of 3 pipes
In case of 2 pipes
+
+
× 1.15
_
+
+
If the o
u
tdoor
u
nit is
REYQ192 and the
piping lengths are as
at right
b
a
c+d+e+f
g+h+j+k
i
26.
8
N
OTE:
Total length (ft.)
of li
qu
id piping
size at
φ
3/4
×0.16
8
Total length (ft.)
of li
qu
id piping
size at
φ
5/
8
×0.114
Total length (ft.)
of li
qu
id piping
size at
φ
1/2
×0.074
Total length (ft.)
of li
qu
id piping
size at
φ
3/
8
×0.036
Total length (ft.)
of li
qu
id piping
size at
φ
1/4
×0.015
Model name
REYQ96
REYQ192
0 l
b
.
6.6 l
b
.
Amo
u
nt of refrigerant
Example for refrigerant
b
ranch
u
sing REF
N
ET joint and REF
N
ET header for
REYQ192
O
u
tdoor
u
nit
BS
u
nit
(
~
)
B1
B6
Indoor
u
nit (
~
)
1
8
Cool/Heat selection possi
b
le (
~
)
1
6
Cooling only ( . )
7
8
H2
H1
a
i
h
4
B4
g
f
3
B3
e
d
2
B2
c
b
1
B1
k
j
5
B5
m
l
6
B6
n
7
o
8
REF
N
ET header
BS
u
nit
(
~
)
B1
B6
1
8
1
6
Cooling only ( . )
7
8
H2
H1
a
i
h
4
B4
g
f
3
B3
e
d
2
B2
c
b
1
B1
k
j
5
B5
m
l
6
B6
n
7
o
8
REF
N
ET header
Bet
w
een BS
u
nit (refrigerant
b
ranch kit) and indoor
u
nit
• Pipe size for direct connection to indoor
u
nit m
u
st
b
e the same as the
connection size of indoor
u
nit.
* mark indicates the BS
u
nit (BS
V
Q36M
V
JU) port and connection pipe are
differnt sizes. Use the red
u
cing joints incl
u
ded
w
ith the BS
u
nit.
f
1/4
f
3/
8
* 12,
1
8
type
24, 30, 36, 4
8
type
f
1/2
f
5/
8
(Unit:in.)
Gas pipe
indoor capacity index
Piping size
Li
qu
id pipe
Bet
w
een t
w
o immediately adjacent refrigerant
b
ranch kits and BS
u
nit
• Choose from the follo
w
ing ta
b
le in accordance
w
ith the total capacity of all the
indoor
u
nits connected
b
elo
w
this.
• Do not let the connection piping exceed the refrigerant piping size chosen
b
y
general system model name.
•
W
hen t
w
o lines are connected
b
et
w
een t
w
o adjacent refrigerant
b
ranch kits,
select the proper gas line size
b
ased on data mentioned
u
nder “s
u
ction gas
line” col
u
mn in the ta
b
le a
b
o
v
e.
S
u
ction
Gas pipe
indoor capacity
index
Piping size
Discharge
Li
qu
id pipe
< 24
24
£
x< 72
72
£
x< 111
111
£
(Unit:in.)
Oil-e
qu
alizing line (Only for m
u
ltiple o
u
tdoor
u
nits installed) (part C)
Piping size
(Unit:in.)
Piping
b
et
w
een o
u
tdoor
b
ranch and o
u
tdoor
u
nit (part B)
Gas pipe
S
u
ction
Discharge
o
u
tdoor capacity
type
Piping size
Li
qu
id pipe
f
3/4
f
3/
8
REYQ96
f
7/
8
(Unit:in.)
Piping
b
et
w
een o
u
tdoor
u
nits and refrigerant
b
ranch kit (part A)
• Match to the size of the connection piping on the o
u
tdoor
u
nit.
φ
3/
8
φ
3/4
φ
3/
8
φ
5/
8
REYQ72
REYQ96
(Unit:in.)
Gas pipe
S
u
ction
Discharge
O
u
tdoor
u
nit
capacity type
Piping size
Li
qu
id pipe
Pipe size,
w
hen o
v
erall e
qu
i
v
alent pipe length is 295ft. or more.
•
W
hen o
v
erall e
qu
i
v
alent pipe length is 295ft. or more, the size of the main
li
qu
id pipe (o
u
tdoor
u
nit-
b
ranch sections) m
u
st
b
e increased. (Only main li
qu
id
pipe)
φ
3/
8
φ
5/
8
φ
1/2
φ
3/4
REYQ72/96
REYQ144/16
8
/192
(Unit:in.)
Main li
qu
id pipe size
O
u
tdoor
u
nit
capacity type
Piping size
N
ormal size
Size
u
p
*
In case of 3 pipes
In case of 2 pipes
indoor
u
nit
REF
N
ET joint
REF
N
ET header
O
u
tdoor
u
nit side
Indoor
u
nit side
Discharge gas pipe
(3 pipes)
(2 pipes)
S
u
ction gas pipe
Li
qu
id pipe
Gas pipe
Li
qu
id pipe
BS
u
nit
1
A
REF
N
ET joint (
~
)
A
A
G
F
B1
BS
u
nit (
~
)
B1
B4
Indoor
u
nit (
~
)
1
8
Cool/Heat selection possi
b
le (
~
)
1
6
7
8
1
h
f
g
i
k
b
m
a
l
c
G
2
j
3
4
B
B2
o
n
5
B3
q
p
6
B4
C
D
r
H2
H1
s
7
8
E
d
e
REF
N
ET joint (
~
)
A
A
G
F
B1
BS
u
nit (
~
)
B1
B4
1
8
Cool/Heat selection possi
b
le (
~
)
1
6
Cooling only
( . )
7
8
1
h
f
g
i
k
b
m
a
l
c
G
2
j
3
4
B
B2
o
n
5
B3
q
p
6
B4
C
D
r
H2
H1
s
7
8
E
d
e
O
u
tdoor
u
nit
BS
u
nit
(
~
)
A
REF
N
ET joint ( . )
A
B
B5
B1
B5
Indoor
u
nit (
~
)
1
8
Cool/Heat selection possi
b
le (
~
, . )
1
4
7
8
Cooling only ( . )
5
6
d
c
1
B1
H2
H1
a
m
b
f
e
2
B2
h
g
3
B3
j
i
4
B4
k
5
l
o
n
p
6
7
8
B
REF
N
ET header
BS
u
nit
(
~
)
A
REF
N
ET joint ( . )
A
B
B5
B1
B5
1
8
1
4
7
8
Cooling only ( . )
5
6
d
c
1
B1
H2
H1
a
m
b
f
e
2
B2
h
g
3
B3
j
i
4
B4
k
5
l
o
n
p
6
7
8
B
REF
N
ET header
R= 100×0.16
8
+ 30×0.014 + 30×0.74 + 120×0.036 + 155×0.015 × 1.15- 6.6 =26.
8
4
8
Total length (ft.)
of li
qu
id piping
size at
φ
7/
8
×0.235
Cool/Heat selection possi
b
le (
~
, . )
Indoor
u
nit (
~
)
Indoor
u
nit (
~
)
Cool/Heat selection possi
b
le (
~
)
Indoor
u
nit (
~
)
Ho
w
to select the REF
N
ET header
• Choose from the follo
w
ing ta
b
le in accordance
w
ith the total capacity of all the indoor
u
nits connected
b
elo
w
the
Cooling only
( . )
REYQ96
REYQ192
REYQ144
REYQ16
8
REYQ192
φ
1-1/
8
φ
1-1/
8
φ
1-1/
8
φ
7/
8
φ
7/
8
φ
7/
8
φ
5/
8
φ
5/
8
φ
5/
8
φ
7/
8
φ
3/4
φ
5/
8
φ
7/
8
φ
1-1/
8
φ
1/4
φ
1/2
φ
3/
8
φ
1/2
φ
3/4
φ
3/
8
φ
1/2
≤
≤
≤
≤
≤
≤
≤
≤
≤
φ
1/2
φ
5/
8
φ
1/4
φ
3/
8
φ
7/
8
φ
3/4
φ
1/4
φ
3/
8
≤