Daikin FXTQ50A2VEB, Installation And Operation Manual

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5
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 for the complete system
Following piping rules have to be respected:
3 Piping connections
General layout (2 possibilities)
1.
2.
A: Piping between outdoor unit and (first) refrigerant branch kit
Choose from the following table in accordance with the outdoor unit
total capacity type, connected downstream.
REYQ*T
RYYQ*T & RXYQ*T
B: Piping between refrigerant branch kits (or BS box)
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.
Selection of refrigerant branch kits: Refnet headers and Refnet joints
4 Additional refrigerant charge
When using FXTQ indoor units, additional refrigerant needs to be
charged to the system.
Total system refrigerant charge = Z; Z = O + R + P
O: standard factory charge of outdoor unit
R: additional refrigerant charge according to liquid piping diameter/length and outdoor unit
specific amount defined in outdoor unit manual
P: additional refrigerant charge due to use of FXTQ indoor units
P =
Σ T
1..4
T: additional charge for each indoor unit used (depending on type)
1 Refrigerant piping
2 Part to be brazed
3 Taping
4 Hands valve
5 Pressure-reducing valve
6 Nitrogen
Outdoor unit FXTQ63 FXTQ50
RYYQ8T - 4 x O
RYYQ10T 4 x O -
RXYQ8T - 4 x O
RXYQ10T 4 x O -
REYQ8T - 4 x O
REYQ10T 4 x O -
Maximum piping length
Longest pipe (actual) 120m
After first branch 40m
Total piping length 300m
Maximum height difference
Indoor-Outdoor (outdoor lowest) 40m
Outdoor-Indoor (outdoor highest) 50m
Indoor-Indoor 15m
1 2 3 4 5
6
6
A
B
C
a1
a2
a2
ID1
ID2
ID3
ID4
OU
ID1 ID2 ID3 ID4
8HP FXTQ50 FXTQ50 FXTQ50 FXTQ50
10HP FXTQ63 FXTQ63 FXTQ63 FXTQ63
Outdoor unit
capacity type
(HP)
Piping outer diameter size (mm)
Liquid pipe Suction gas pipe High pressure/
low pressure gas
pipe
8 9.5 19.1 15.9
10 9.5 22.2 19.1
Outdoor unit
capacity type
(HP)
Piping outer diameter size (mm)
Gas pipe Liquid pipe
8 19.1 9.5
10 22.2 9.5
8/10HP Liquid Suction
gas
HP/LP
gas
RXYQ
9,5 22,2
-
RYYQ
REYQ 19,1
Refnet joints Refnet headers
a1 a2 b
8HP
KHRQ22M29T9
or
KHRQ23M29T9
KHRQ22M29T9
or
KHRQ23M29T9
KHRQ22M64H
or
KHRQ23M64H
10HP
KHRQ22M29T9
or
KHRQ23M29T9
KHRQ22M29T9
or
KHRQ23M29T9
KHRQ22M64H
or
KHRQ23M64H
A
C
b
ID1
ID2 ID3
ID4
OU