Daikin RWEYQ144PTJU [22/95] Edus301214 n installation manual
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Daikin RWEYQ144PTJU [22/95] Edus301214 n installation manual

Daikin RWEYQ144PTJU [22/95] Edus301214 n installation manual
EDUS301214-N Installation Manual
Installation of Outside Units 21
3P153897-12X
9-5 Example of connection
In case of a system of switching between cooling and heating, all systems use 2-tube piping (for suction gas piping and liquid piping). No BRANCH
3ELECTORUNITis required.
Example of connection
(Connection of 8 indoor units Heat pump system)
Single outside
unit installed
(RWEYQ72, 84)
a
b
k
i
j
c
de
s
c
am
b
r
qom
n
p
Outside unit
Outside unit
Outside unit
Outside unit
REFNET joint (A-G)
REFNET joint (A-G)
REFNET joint (A·B)
REFNET joint (A·B)
REFNET header
REFNET header
REFNET header
REFNET header
BS units
( B1 - B4 )
When multiple
outside units
installed
(RWEYQ144~)
Maximum
allowable
length
Between outside
(
∗
)
and indoor units
Between outside branch and outside unit
(In case of RWEYQ144 or more)
Between outside and indoor units
Between indoor and indoor units
Between outside and outside units
Actual pipe length
Actual pipe length
Actual pipe length
Difference in height
Difference in height
Difference in height
Equivalent length
Total extension length
Pipe length between outside (∗2) and indoor units ≤ 390 ft
(Example 1,4) unit 8 : a + b + c + d + e + s ≤ 390 ft
(Example 1,4) unit 8 : b + c + d + e + s ≤ 130 ft
Equivalent pipe length between outside (∗2) and indoor units ≤ 459 ft (assume equivalent pipe length of REFNET joint to be 1.6 ft, that of REFNET header to be 3.3 ft, BSVQ36, 60 is 13.1 ft and BSVQ96 is 19.7 ft.)
Piping length from outside branch to outside unit ≤ 33 ft Equivalent length: max 43 ft
Difference in height between outside and indoor units (H1) ≤ 164 ft (Max 130 ft if the outside unit is below)
Difference in height between indoor units (H2) ≤ 49 ft
Difference in height between outside unit (main) and outside unit (sub) (H3) ≤ 6.5 ft
Pipe length from first refrigerant branch kit (either REFNET joint or REFNET header ) to indoor unit ≤ 130 ft
Total piping length from outside unit (∗2) to all indoor units ≤ 980 ft
Allowable
height
length
Allowable length after the branch
(Example 3,6) unit 8 : a + o ≤ 390 ft
(Example 2,5) unit 6 : a + b + l ≤ 390 ft, 8 : a + m + n + p ≤ 390 ft
(Example 3,6) unit 8 : o ≤ 130 ft(Example 2,5) unit 6 : b + l ≤ 130 ft, 8 :m + n + p ≤ 130 ft
r ≤ 33 ft (Equivalent length ≤ 43 ft)
u+s ≤ 33 ft (
Equivalent length ≤ 43 ft)
u+t ≤ 33 ft (
Equivalent length ≤ 43 ft)
Refrigerant branch kits can only be
used with R410A.
How to select REFNET joint:
• When using REFNET joints at the first branch counted from the outside unit side.
Choose from the following table in accordance with the capacity of the outside unit.
(Example 1,2,4,5 : REFNET joint
A
)
Additional refrigerant to be charged R (lbs)
(R should be rounded off in units of 0.1 lbs.)
NOTE:
If a negative result is gotten for R from the formula at right,
no refrigerant needs to be added.
RWEYQ72, 84
RWEYQ144, 168
RWEYQ216, 252
KHRP25A33T9
KHRP25M72TU9
KHRP25M73TU9
KHRP26A33T9
KHRP26M72TU9
KHRP26M73TU9
•
For REFNET joints other than the first branch, select the proper branch kit model based on the total capacity index.
How to select REFNET header
• Select suitable one from the table below according to the total capacity of indoor units to be connected to the
down stream of REFNET header.
How to select an outside branch kit (Needed when the outside unit type is RWEYQ144 or more.)
• Select from the table below according to the number of outside units.
(Example 1,4) In case of REFNET Joint
C
, indoor units of 5 + 6 + 7 + 8
(Example 2,5) In case of REFNET Joint
B
, indoor units of 7 + 8
(Example 2,5) In case of REFNET Header, indoor units of 1 + 2 + 3 + 4 + 5 + 6
(Example 3,6) In case of REFNET Header,
indoor units of 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
Example of downstream indoor units
Piping between refrigerant branch kit and refrigerant branch kit/BS unit
Piping between BS unit and refrigerant branching kit
• Select one from the table below according to the total capacity of indoor units to
be connected to downstream.
•
For the gas piping size in case of 2-tube piping between refrigerant branching kit/BS unit
and refrigerant branching kit, select the size of suction gas piping.
•
The size of connection piping should not exceed the refrigerant piping size selected
under the generic term of the system.
Indoor unit connection piping size
Piping between BS unit (refrigerant branch kit) and indoor unit
• Match to the size of the connection piping on the indoor unit.
a:φ 3/4×30 ft
b:φ 5/8×10 ft
c:φ 3/8×10 ft
d:φ 3/8×10 ft
e:φ 3/8×10 ft
f:φ 3/8×10 ft
g:φ 1/4×10 ft
h:φ 1/4×20 ft
i:φ 1/2×10 ft
j:φ 1/4×10 ft
k:φ 1/4×10 ft
l:φ 1/4×10 ft
m
: φ 1/4×10 ft
n:φ 1/4×10 ft
o:φ1/4×10 ft
p:φ 1/4×10 ft
r:φ 3/8× 3 ft
s:φ 3/8× 3 ft
t:φ 3/8× 3 ft
u:φ 5/8× 1 ft
Diameter of liquid pipe (main pipe portion)
R= +
Outside unit
capacity type
Refrigerant branch kit name
+ +
+
+
+
(Heat recovery system)
If the outside unit is
RWEYQ252 and the
piping lengths are as
at right
R= 30 0.168 + 11 0.114 + 10 0.074 + 49 0.036 + 100 0.015 + 13 = 23.298
b+ua c+d+e+f+r+s+t g+h+j+k+l+m+n+o+pi
23.3 (lbs)
Total length (ft) of liquid
piping size at
φ
7/8
×0.235
(lbs/ft)
⎛
⎜
⎝
⎞
⎟
⎠
Total length (ft) of liquid
piping size at
φ3/8
⎛
⎜
⎝
⎞
⎟
⎠
Total length (ft) of liquid
piping size at
φ1/4
⎛
⎜
⎝
⎞
⎟
⎠
Total length (ft) of liquid
piping size at
φ
3/4
⎛
⎜
⎝
⎞
⎟
⎠
Total length (ft) of liquid
piping size at
φ5/8
⎛
⎜
⎝
⎞
⎟
⎠
Total length (ft) of liquid
piping size at
φ1/2
⎛
⎜
⎝
⎞
⎟
⎠
×0.168
(lbs/ft)
×0.114
(lbs/ft)
×0.074
(lbs/ft)
×0.036
(lbs/ft)
×0.015
(lbs/ft)
System name
1 unit (72 / 84)
2 unit multi (144 / 168)
3 unit multi (216 / 252)
4.4
5.5
6.6
6.6
9.9
13
Heat recovery system Heat pump system
Example for refrigerant branch using REFNET joint and REFNET header for RWEYQ252
Refrigerant branch kit selection
Pipe size selection
For an outside unit multi installation (RWEYQ144, 168, 216, 252 type),
make the settings in accordance with the following figure.
Piping between outside unit and refrigerant branch kit (part A)
Piping between outside branches (part B)
Piping between outside branch and outside unit (part C)
How to calculate the additional refrigerant
to be charged
Outside unit
r
s
u
Heat recovery system Heat pump system
Indoor unit
capacity type
Piping size (outer diameter)
Liquid pipeGas pipe
φ 1/2
φ 5/8
φ 1/4
φ 3/8
07~18 type
24~48 type
(Unit: inch) Indoor unit connection piping size
Indoor units
( 1 - 8 )
Heat recovery system
( 1 - 6 )
Cooling only
( 7
·
8 )
BS units
( B1 - B4 )
Indoor units
( 1 - 8 )
Heat recovery
system ( 1 - 6 )
Cooling only
( 7
·
8 )
BS units ( B1 - B5 )
BS units
( B1 - B5 )
Indoor units
( 1 - 8 )
Heat recovery system
( 1 - 4 , 7 · 8 )
Indoor units
( 1 - 8 )
Cooling only
( 5
·
6 )
l
f
g
a
b
c
d
e
h
H2
H1
H1
1
1234567
8
234567
1
1
2
3
456
7
8
23456
7
8
8
B2
B3 B4
B1
B1
B2 B3 B4
B5
B2 B3 B4
B5
d
e
f
g
h
i
j
k
l
m
a
a
b
a
b
d
f
c
e
g
f
h
j
d
c
e
gi k
l
m
n
o
b
Outside unit
Outside
unit
1
123
456 7
8
2
34567
8
B1 B2 B3 B4 B5 B6
B6B5B4B3B2B1
BS units
( B1 - B6 )
BS units
( B1 - B6 )
Indoor units
( 1 - 8 )
Heat recovery system
( 1 - 6 )
Heat recovery
system ( 1 - 6 )
Indoor units
( 1 - 8 )
Cooling only
( 7
·
8 )
Cooling only
( 7
·
8 )
First outside
branch
s
r
p
q
n
o
k
i
l
j
h
g
f
H3
H1
H2
h
i
j
k
l
m
n
o
BS
unit
Outside
unit side
(Thick line): 3-tube piping
Indoor
unit side
(3-tube piping) (2-tube piping)
Discharge gas piping
Gas piping
Liquid piping
Liquid piping
Suction gas piping
• Piping between outside unit and BS unit
Discharge gas piping
Suction gas piping
Liquid piping
(Thin line): 2-tube piping
• Piping between BS unit and indoor unit,
Suction gas piping
Liquid piping
If the system capacity is RWEYQ144 or more,
re-read the [outside unit] as [the first outside branch
seen from the indoor unit side].
[∗]
Corrected
volume by
outside unit
t
H1
H2
Heat recovery system
( 1 - 4 , 7 · 8 )
Cooling only
( 5
·
6 )
m
Branch with REFNET joint Branch with REFNET joint and REFNET header Branch with REFNET header
Capacity type
of outside unit
Piping size (outer diameter)
When increasedStandard size
φ 3/8
φ 1/2
φ 5/8
φ 3/4
φ 1/2
φ 5/8
φ 3/4
φ 7/8
RWEYQ72,84
RWEYQ144
RWEYQ168,216
RWEYQ252
Piping between outside unit and refrigerant branch kit (part A)
• Match to the size of connection piping of outside unit
Capacity type
of outside unit
Piping size (outer diameter)
Suction gas pipe
φ 3/4
φ 7/8
φ 1-1/8
φ 1-3/8
Discharge gas pipe
φ 5/8
φ 3/4
φ 7/8
φ 1-1/8
Liquid pipe
φ 3/8
φ 1/2
φ 5/8
φ 3/4
RWEYQ72
RWEYQ84
RWEYQ144
RWEYQ168
RWEYQ216
RWEYQ252
(Unit: inch)
Example 1
Example 4
Example 2
Example 5
Example 3
Example 6
<72
72≤x<111
111≤x<246
246≤
KHRP25M33H9
KHRP25M72H9
KHRP25M73HU9
KHRP26M22H9, KHRP26M33H9
KHRP26M33H9
KHRP26M72H9
KHRP26M73HU9
Indoor
capacity index
Refrigerant branch kit name
In case of 3-tube piping In case of 2-tube piping
2 unit
3 unit
BHFP26MA56U
BHFP26MA84U
BHFP22MA56U
BHFP22MA84U
Number of units
of outside unit
Heat recovery system Heat pump system
<72
72≤x<111
111≤x<246
246≤
KHRP25A22T9
KHRP25A33T9
KHRP25M72TU9
KHRP25M73TU9
KHRP26A22T9
KHRP26A33T9
KHRP26M72TU9
KHRP26M73TU9
Indoor
capacity index
Refrigerant branch kit name
In case of 3-tube piping In case of 2-tube piping
Piping between outside branches (part B)
• Select the size from the following table based on the total capacity
of the outside unit to be connected to upstream
Capacity type
of outside unit
Piping size (outer diameter)
Suction gas pipe
φ 1-1/8
Discharge gas pipe
φ 7/8
Liquid pipe
φ 1/2
φ 5/8
RWEYQ144
RWEYQ168
(Unit: inch)
Piping between outside branch and outside unit (part C)
Capacity type
of outside unit
Piping size (outer diameter)
Suction gas pipe
φ 3/4
φ 7/8
Discharge gas pipe
φ 5/8
φ 3/4
Liquid pipe
φ 3/8
RWEYQ72
RWEYQ84
(Unit: inch)
Piping size increase in case of long piping
• When the equivalent length is 262.5 ft or more, it is necessary to
increase the size of the main pipe of liquid piping side.
• When the equivalent length is 262.5 ft or more, do not increase the sizes
of discharge and suction gas pipes.
(Unit: inch)
(Unit: lbs)
Indoor unit
capacity type
Piping size (outer diameter)
Suction gas pipe
φ 1/2
φ 5/8
φ 7/8
φ 1-1/8
φ 1-1/4
Discharge gas pipe
φ 3/8
φ 1/2
φ 3/4
φ 1-1/8
Liquid pipe
φ 1/4
φ 3/8
φ 1/2
φ 5/8
φ 3/4
<24
24≤x<72
72≤x<111
111≤x<162
162≤x<246
246≤
(Unit: inch)
B1
B1 B2 B3 B4
np
o
H2
c
d
e
f
g
h
i
j
k
l
n
p
o
u
t
s
r
H3
H2
H1
H3
H1
H2
A
B
A
AB
CDE
B
F
ABCDE
G
FG
*For Geothermal Applications, if the condenser is lower than the indoor units, the maximum vertical separation is 65 ft (20 m).

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