1-47
1
1
1. Precautions during refrigerant installation.
Use clean pipes with no dust inside.
The pipe may corrode with the presence of fl uorine dust which will adversely affect the refrigerant piping system due to
deterioration of the refrigerant oil, etc.
This unit is specifi cally for R410A. Ensure to adhere to the following
items and install accordingly:
•
Use pipe cutters and fl aring tools which are specially designed for
use with R410A.
•
When connecting with fl aring tools, coat the fl are section with ether-
based oil.
•
Ensure to use fl are nuts supplied with the unit when connecting this
unit.
•
Only for storing or for open pipes.
•
Set the lower limit of the allowable pipe length to 5m.
If the pipe is shorter than 5m, the refrigerant may become overfi lled
and a problem such as abnormal high pressure could occur.
•
Carefully handle the liquid refrigerant, as it may cause a frostbite.
•
Do not release refrigerants during the piping works for installing,
re-installing and repairing refrigeration parts.
2. The local pipes can protrude from any four directions.
Make holes in the pipe panel for the pipes to penetrate it and lay the
pipes accordingly.
•
It is recommended to apply additional substance to the cut area for
anti-rust protection.
Ensure to install pipe panels to prevent rain water from getting into
the unit.
Close the gap at the pipe connected area with putty or heat insulator
(locally supplied).
•
If an insect or small animal enters the outdoor unit, there is the risk
of shorting in the product electronic casing.
[Remove the front panel]
(1) Remove the 2 mounting screws.
(2) Slide the front panel using your hands downwards to release the
pawls.
Then remove by pulling the panel towards you.
Front panel
Mounting
screws for the
front panel
Rear
direction
Sideways
direction
Rear piping
panel
Front piping panel
Downward
direction
Front
direction
Putty or heat
insulator (locally
supplied)
Piping
Prevention measures to avoid small
animals from entering
For indoor unit refrigerant piping installation, refer to the installation instruction
manual that comes with that indoor unit.
Do not reuse existing piping, install new piping.
6. REFRIGERANT INSTALLATION
Specifi cation for pipe connecting indoor unit to outdoor unit.
A
8
R
2
E
P
4
2
2
/
A
8
R
2
E
P
0
0
2
-
U
e
m
a
n
l
e
d
o
M
m
0
5
m
0
5
30m
30m
30m
30m
h
t
g
n
e
l
e
p
i
p
m
u
m
i
x
a
M
Height difference
Outdoor located higher installation
Outdoor located lower installation
Piping Connections
7
.
2
1
ø
2
5
.
9
ø
e
d
i
s
d
i
u
q
i
L
5
0
.
9
1
ø
e
d
i
s
s
a
G
ø19.05 (~30m)
ø25.4 (30~50m)
U-160PE2R8A/180PE2R8A
1-41
1
Do not open the 3-way valve until the piping installation is completed.
It is closed during shipment.
During installation the side panel may warp if only the are nut is loosened and tightened with a torque wrench. As a
result, always be sure to secure to the hexagonal part of the 3-way valve with a spanner, or other tool.
Refer to the following table for the tightening torque of the 3-way valve are nuts.
If the nuts are over tightened, they may cause the ares to break or leak.
Do not add additional force to the valve’s cover.
Using spanners on the cover or valve itself (other than the hexagonal parts) may cause gas leakage.
Avoid using spanners on the cover or parts other than the hexagonal part of the valve.
Precautions w hen operating the 3-w ay valve for piping installation
Service port
Service port
Valve shaft
Valve cap
Valve cap
Flare nut
Spanner (Secure)
Torque wrench
H exagonal part
of the valve
Please do not apply the
spanner in this position.
Torque
wrench
Liquid side
Gas side
Silicone sealing agent
(Ensure not to leave any holes)
During the cooling mode operation under low ambient pressure, the low
pressure side of the valve can be prone to freezing. Secure the are nut
(shared gas side / liquid side) section of the valve with a silicone sealing
agent to prevent this from occurring.
Gas side
Opening: Open the valve cap, pull out the knob and use
pliers etc. to turn the knob 9 0° counter-clockwise.
Closing: Open the valve cap, pull out the knob and use
pliers etc. to turn the knob 9 0° clockwise.
Liquid side
Opening: Open the valve cap and turn the Allen wrench
counter-clockwise until it stops.
Closing: Open the valve cap and turn the Allen wrench
clockwise until it stops.
Use an Allen wrench (Size 4 mm or 6 mm).
Direction to open
[ 3-way valve operation method]
Ensure not to scratch the inner surface of the valve or the end of
the valve shaft.
Once adjustments to the valve are completed, ensure to tighten
the valve cap according to the prescribed torque.
Precautions for handling the valve cap
g
Gas side
20~25 (200~250)
Liquid side
17± 3 (170± 30)
Use a push-rod with a charge hose.
Once adjustments to the valve are completed, ensure to tighten the
valve cap according to the prescribed torque.
Precautions for handling the service ports
Tightening torque
(110± 10k
g
Ensure that the pipes do not come into contact with the compressor’s bolts
or exterior panel.
There is a risk of condensation from the 3-way valve coming out between the
insulation material and the indoor unit’s piping when you install the outdoor
unit above then the indoor unit. Ensure to caulk the connection parts.
Precautions for connecting the pipes
Caulking treatment, etc.
Insulation
material
Piping
Opening direction
K nob
Fully open
Fully closed
Spanner
(Secure)
(For U-160PE2R8A and U-180PE2R8A, please use a single,
open-end spanner to loosen and tighten the liquid side 3-way
valv
nut.)
SM830262-00_大洋州向け シングル天埋_TD&SM.indb 47
18/01/26 13:2 :30
Содержание S-160PE1R5A
Страница 8: ...vii MEMO SM830262 00_大洋州向け シングル天埋_TD SM indb 8 18 01 12 18 47 0 ...
Страница 98: ...1 90 MEMO SM830262 00_大洋州向け シングル天埋_TD SM indb 0 18 01 26 13 2 4 ...
Страница 196: ... MEMO 7 16 SM830262 00_大洋州向け シングル天埋_TD SM indb 16 18 01 2 17 42 12 ...
Страница 218: ...201801 SM830262 00_大洋州向け シングル天埋_TD SM indb 1 17 12 27 14 22 33 ...