Removal Of Air From The Pipe And Gas Leakage Inspection
Gas Leakage Inspection
Please use gas leakage detector to check if
leakage occurs at the connection of Flare
nut as shown on the right.
If gas leakage occurs, further tighten the
connection to stop leakage. (Use the detector
provided for R410A)
3
Procedures of using Vacuum Pump for Air Removal
As shown in right figure, remove the cap
of valve core. Then, connect the charge
hose. Remove the cap of valve head.
Connect the vacuum pump adapter to
the vacuum pump and connect the
charge hose to the adapter.
Fully tighten the “Hi” shuttle of the
manifold valve and completely unscrew
the “Lo” shuttle. Run the vacuum pump
for about 10–15 minutes, then completely
tighten the “Lo” shuttle and switch off
the vacuum pump.
2
Completely unscrew the spindle of the
service valve (at 2 places) in anti-
clockwise direction to allow the flow of
coolant (using Hexagonal Wrench key).
3
Remove the charge hose and tighten the
cap of valve head. Check the cap’s
periphery if there is any gas leakage.
The task is then completed.
1
Preparation of Pipe
1
●
Use a pipe cutter to cut the copper pipe.
●
Jagged edge will cause leakage.
●
Point the side to be trimmed downwards during trimming to prevent copper
chips from entering the pipe.
●
Before flaring, please put on the flare nut.
Pipe Connection
2
CAUTION
!
Outer
dia.of pipe
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
Valve
head cap
Torque N·m
(kgf · cm)
13.7 – 18.6 (140 – 190)
34.3 – 44.1 (350 – 450)
44.1 – 53.9 (450 – 550)
19.6 – 24.5 (200 ~ 250)
19.6 – 24.5 (200 ~ 250)
29.4 – 34.3 (300 – 350)
12.3 – 15.7 (125 ~ 160)
Outer
Diameter (mm)
6.35
9.52
12.7
For R410A tool
0.0
~
0.5mm
0.0
~
0.5mm
0.0
~
0.5mm
For R22 tool
A (mm)
Small dia. side
Large dia. side
Valve core cap
AIR REMOV
AL
●
Recommend to use
R410A flaring tool.
Small dia. side
Large dia. side
CAUTION
!
In case of removing flare nut of an Indoor unit, first remove a nut
of small diameter side, or a seal cap of big diameter side will fly
out. Prevent water from entering into the piping when working.
When the meter reaches - 101KPa
(-76cmHg) during pumping, fully
tighten the shuttle.
Meter showing pressure
Closed
R410A
Manifold valve
Vacuum
pump
Valve
Charge hose
Valve
Vacuum pump
adapter
When pumping starts, slightly loosen the
flare nut to check of air sucked in. Then
tighten the flare nut.
Copper pipe
Trimming tool
A
Die
Die
Copper pipe
1.0mm
1.0mm
1.0mm
Wrench
Torque
wrench
Flare nut
Lo
Hi
The body of
service valve
Cap of
valve core
Hexagonal
Wrench Key
Cap of valve head
Cap of valve head
4
WARNING
●
If you cannot attach the side cover due to the connecting cord,
press the connecting cord in direction to the front panel to fix it.
●
Be sure that the hooks of the side cover is fixed in certainly.
Otherwise water leakage may occur and this causes short circuit
or faults.
●
The connecting cord should not touch to service valve and pipes.
(It becomes high temperature in heating operation.)
Checking for the electric source and the
voltage range
●
Before installation, the power source must be checked and necessary wiring work
must be completed. To make the wiring capacity proper, use the wire gauges list
below for the lead-in from a pole transformer and for the wiring from a switch board
of fuse box to the main switch and outdoor unit in consideration of the locked rotor
current.
●
Investigate the power supply capacity and
other electrical conditions at the installation
location.
Depending on the model of room air
conditioner to be installed, request the
customer to make arrangements for the
necessary electrical work etc.
The electrical work includes the wiring work
up the outdoor. In localities where electrical
conditions are poor, use of a voltage
regulation is recommended.
●
THIS APPLIANCE MUST BE EARTHED.
Procedures of Wiring
Wiring of The Outdoor Unit
●
Please remove the side cover for wire connection.
!
WARNING
!
In case that power is supplied from Outdoor Unit
Earth terminal
N C D
Power supply shall be connected at the rated voltage, otherwise the unit will be
broken or could not reach the specified capacity.
D
C
N
L
D
C
Indoor Unit
Outdoor Unit
Connecting Cord
Connecting Cord
AC 220 - 230V
1.6 or
2.0
2.0
L
●
The naked part of the wire core should be 10 mm and fix it to the terminal
tightly. Then try to pull the individual wire to check if the contact is tight. Improper
insertion may burn the terminal.
●
Be sure to use only power cables approved from the authorities in your country.
For example in Germany: Cable type: NYM 3x1.5mm
2
.
●
Please refer to the installation manual for wire connection to the terminals of the
units. The cabling must meet the standards of electrical installation.
●
There is a AC voltage of 230V between the L and N terminals. Therefore,
before servicing, be sure to remove the plug from the AC outlet or switch off
the main switch.
WARNING
!
Outdoor
Unit
GRN + YEL
Strip wires
25mm
25mm
10mm
10mm
10mm
35mm
Cable length
up to
1
6m
up to 15m
up to 25m
Wire cross-section
1.5mm
2
2.5mm
2
4.0mm
2
IMPORTANT
FINAL
ST
AGE OF INST
ALLA
TION
Insulation And Maintenance Of Pipe Connection
1
●
The connected terminals should be completely sealed with heat insulator and
then tied up with rubber strap.
●
Please tie the pipe and power line together with vinyl tape as shown in the figure
showing the installation of Indoor and Outdoor units. Then fix their position with
holders.
●
To enchance the heat insulation and to prevent water condensation, please
cover the outdoor part of the drain hose and pipe with insulation pipe.
●
Completely seal any gap with putty.
Power Source And Operation Test
2
Power Source
CAUTION
!
●
Please use a new socket. Accident may occur due to the use of old socket
because of poor contact.
●
Please plug in and then remove the plug for 2 – 3 times. This is to ensure that
the plug is completely plugged into the socket.
●
Keep additional length for the power cord and do not render the plug under
external force as this may cause poor contact.
●
Do not fix the power cord with U-shape nail.
Sleeve of
protection pipe
Putty
Putty
Insulation material for pipe connection
<
I867: A
>
Operation Test
●
Please ensure that the air conditioner is in normal operating condition during
the operation test.
●
Explain to your customer the proper operation procedures as described in the
user’s manual.
Power line
Control line
Use 16A Time
Delay Fuse
(EN) INS RAC-25/35/50NH5
20/10/05, 9:14 AM
2
