4 Preparation
Installation and operation manual
10
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV system air conditioner
4P370473-1C – 2016.07
A: Piping between outdoor unit and first refrigerant branch kit
Use the following diameters:
Outdoor unit
capacity type (HP)
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
8
19.1
9.5
10
22.2
9.5
12~16
28.6
12.7
B: Piping between refrigerant branch kits
Use the following diameters:
Outdoor unit
capacity type (HP)
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
8+10
22.2
9.5
12
28.6
12.7
14+16
28.6
15.9
C: Piping between refrigerant branch kit and indoor unit
Use the same diameters as the connections (liquid, gas) on the
indoor units. The diameters of the indoor units are as follows:
Indoor unit
Piping outer diameter size (mm)
Gas pipe
Liquid pipe
FXTQ50
15.9
9.5
FXTQ63
15.9
9.5
FXTQ80
19.1
9.5
FXTQ100
22.2
9.5
a1, a2: Refnet joints
Outdoor unit capacity type
(HP)
Refnet joint
8+10
KHRQ22M29T9
12~16
KHRQ22M64T
b: Refnet header
Outdoor unit capacity type
(HP)
Refnet header
8+10
KHRQ22M64H
12~16
KHRQ22M75H
Additional refrigerant charge
When using FXTQ indoor units, additional refrigerant needs to be
charged to the system.
Total system refrigerant charge = 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. See
"5.6.3 To determine the additional refrigerant amount" on
page 17
.
P
Additional refrigerant charge due to use of FXTQ indoor
units. P=ΣT
1..4
T
Additional charge for each indoor unit used (depending on
type)
Indoor unit
T (kg)
FXTQ50
0.6
FXTQ63
0.5
FXTQ80
0.9
FXTQ100
1.1
4.2.5
Multiple outdoor units: Possible layouts
▪ The piping between the outdoor units must be routed level or
slightly upward to avoid the risk of oil retention into the piping.
Pattern 1
Pattern 2
a
b
b
a
b
a
a
b
a
b
b
a
a
To indoor unit
b
Piping between outdoor units
X
Not allowed
O
Allowed
▪ To avoid the risk of oil retention to the outmost outdoor unit,
always connect the stop valve and the piping between outdoor
units as shown in the 4 correct possibilities of the figure below.
a
b
b
b
a
b
b
b
a
b
a
b
a
b
a
a
a
≥200 mm
a
To indoor unit
b
Oil collects to the outmost outdoor unit when the system
stops
X
Not allowed
O
Allowed
▪ If the piping length between the outdoor units exceeds 2 m, create
a rise of 200 mm or more in the gas line within a length of 2 m
from the kit.
If
Then
≤2 m
a
b
≤2 m
>2 m
a
≤2 m
≤2 m
≥200 mm
≥200 mm
b
>2 m
>2 m
a
To indoor unit
Содержание RXYQ10T7Y1B
Страница 43: ......
Страница 44: ...4P370473 1 C 0000000 4P370473 1C 2016 07 Copyright 2014 Daikin...