6
English
When using FXTQ (high efficiency range) indoor units in
combination with VRV4 outdoor unit systems, please take into
account the following rules.
(1) Combination table
FXTQ indoor units can only be used corresponding to below
combination table.
FXTQ indoor units cannot be combined with any other indoor
unit type compatible with the outdoor unit.
(2) Piping rules of the system
Following piping rules have to be observed:
(3) Piping connections
General layout (2 possibilities)
Piping between outdoor unit and (first) refrigerant branch
kit: A
Choose from the following table in accordance with the outdoor
unit total capacity type.
REYQ*T
RYYQ*T & RXYQ*T
Piping between refrigerant branch kits (or BS box): B
Choose from the following table in accordance with the indoor
unit total capacity type, connected downstream. Do not let the
connection piping exceed the refrigerant piping size chosen by
the general system model name.
Piping between refrigerant branch kit and indoor unit: C
Pipe size for direct connection to indoor unit must be the same
as the connection size of the indoor unit.
Selection of refrigerant branch kits: Refnet headers and
Refnet joints
Refnet joints
Outdoor unit
FXTQ100
FXTQ80
RYYQ12T
-
4x O
RYYQ14T
2x O
2x O
RYYQ16T
4x O
-
RXYQ12T
-
4x O
RXYQ14T
2x O
2x O
RXYQ16T
4x O
-
REYQ12T
-
4x O
REYQ14T
2x O
2x O
REYQ16T
4x O
-
Maximum piping length
Longest pipe (actual)
120 m
After first branch
40 m
Total piping length
300 m
Maximum height difference
Indoor-outdoor (outdoor lowest)
40 m
Outdoor-indoor (outdoor highest)
50 m
Indoor-indoor
15 m
4
2
3
4
1
1
2
3
4
3
2
1
1.
2.
C
C
A
A
B
b
a1
a2
a2
12HP
FXTQ80 FXTQ80 FXTQ80 FXTQ80
14HP
FXTQ100 FXTQ80 FXTQ100 FXTQ80
16HP
FXTQ100 FXTQ100 FXTQ100 FXTQ100
Outdoor unit
capacity type
(HP)
Piping outer diameter size (mm)
Liquid pipe
Suction gas
pipe
High
pressure/low
pressure gas
pipe
12
12.7
28.6
19.1
14~16
12.7
28.6
22.2
Outdoor unit
capacity type
(HP)
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
12~16
28.6
12.7
8/10HP
HP/LP gas
RXYQ
-
RYYQ
REYQ
19.1
12HP
Liquid
Suction gas
HP/LP gas
RXYQ
12.7
28.6
-
RYYQ
REYQ
19.1
14/16HP
Liquid
Suction gas
HP/LP gas
RXYQ
15.9
28.6
-
RYYQ
REYQ
28.6
Indoor unit
Gas
Liquid
FXTQ80
19.1
9.5
FXTQ100
22.2
9.5
a1
a2
12HP
KHRQ22M64T or
KHRQ23M64T
KHRQ22M64T or
KHRQ23M64T
14HP
KHRQ22M64T or
KHRQ23M64T
KHRQ22M64T or
KHRQ23M64T
16HP
KHRQ22M64T or
KHRQ23M64T
KHRQ22M64T or
KHRQ23M64T
4PEN408655-1B_2016_02.book Page 6 Friday, February 19, 2016 1:33 PM
