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13 Piping installation
Installation and operation manual
14
FXMQ-A
VRV system air conditioner
3P701545-1 – 2022.07
3
Push the drain hose as far as possible over the adapter for the
drain hose.
4
Tighten the metal clamp until the screw head is less than 4 mm
from the metal clamp part.
5
Check for water leaks (see
6
Install the insulation piece (drain pipe).
b
a
c
d
e
a
Indoor unit
b
BSP 1" internal thread
c
Adapter (field supply)
d
Metal clamp (field supply)
e
Insulation material for drain pipe (field supply)
To check for water leaks
The procedure differs depending on whether installation of the
system is already completed. When installation of the system is not
yet completed, temporarily connect the user interface and power
supply to the unit.
When installation of the system is not yet completed
1
Temporarily connect electrical wiring.
▪ Remove the service cover.
▪ Connect the power supply.
▪ Connect the user interface.
▪ Reattach the service cover.
a
L N
b
c
a
User interface terminal block
b
Power supply terminal block
c
Service cover with wiring diagram
2
Turn ON the power supply.
3
Start fan only operation (see the reference guide or the service
manual of the user interface).
4
Gradually pour approximately 1 l of water to the drain pan, and
check for leaks.
a
b
c d
a
Container with water
b
Drain pan
c
Drain outlet
d
Refrigerant pipes
5
Turn OFF the power.
6
Disconnect the electrical wiring.
▪ Remove the service cover.
▪ Disconnect the power supply.
▪ Disconnect the user interface.
▪ Reattach the service cover.
When installation of the system is already completed
1
Start cooling operation (see the reference guide or the service
manual of the user interface).
2
Gradually pour approximately 1 l of water to the drain pan, and
check for leaks (see
"When installation of the system is not yet
14]).
13
Piping installation
13.1
Preparing refrigerant piping
13.1.1
Refrigerant piping requirements
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant piping.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
Pipe outer diameter (mm)
Class
Liquid pipe
Gas pipe
200
Ø9.5 mm
Ø19.1 mm
250
Ø9.5 mm
Ø22.2 mm
Refrigerant piping material
▪
Piping material:
phosphoric acid deoxidised seamless copper
▪
Flare connections:
Only use annealed material.
▪
Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade
Thickness (t)
(a)
9.5 mm (3/8")
Annealed (O)
≥0.8 mm
t
Ø
19.1 mm (3/4")
22.2 mm (7/8")
(a)
Depending on the applicable legislation and the maximum
working pressure of the unit (see "PS High" on the unit name
plate), larger piping thickness might be required.
13.1.2
Refrigerant piping insulation
▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052 W/mK (0.035
and 0.045 kcal/mh°C)
▪ with a heat resistance of at least 120°C
▪ Insulation thickness
Summary of Contents for VRV system FXMQ200AXVMB
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