6
5
•
Note: Isolating Devices (Disconnecting means)
should have minimum 3.0 mm contact gap.
•
Earth wire shall be Yellow/Green (Y/G) in colour
and longer than other AC wires for safety reason.
WARNING
This equipment must be properly earthed.
1.
Remove the control board cover (metal) from the unit by loosening two screws.
2.
Cable connection to the power supply through isolating Devices (Disconnecting means).
•
Connect approved type polychloroprene sheathed
power supply cord
3 x 1.5 mm
2
type designation
60245 IEC 57 or heavier cord to the terminal board, and connect the others end of the cord to Isolating
Devices (Disconnecting means)
3.
Connection cable
between indoor unit and outdoor unit shall be approved polychloroprene sheathed
4 x 1.5 mm² fl exible cord, type designation 60245 IEC 57 or heavier cord. Allowable connection cable
length of each indoor unit shall be 30 m or less.
4.
Connect the power supply cord and connecting cable between indoor unit and outdoor unit according
to the diagram as shown.
5.
Secure the power supply cord and connection cables onto the control board with the
holder.
6.
Attach the control board cover back to the original position with screw.
7.
For wire stripping and connection requirement, refer to the diagram as shown.
Terminals on the indoor unit
1
2
3
1
2
3
Colour of wires (Connection cable)
Terminals on the outdoor unit
L
N
1
2
3
1
2
3
(Power supply cord)
(UNIT A)
(UNIT B)
Terminals on the Isolating devices
(Disconnecting means)
(L) (N)
1.
Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap the
insulated piping end to prevent water from going inside the piping.
2.
If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E FOAM
with thickness 6 mm or above.
Wire stripping
No loose strand
when inserted
10 ± 1 mm
WIRE STRIPPING,
CONNECTING
REQUIREMENT
5 mm or more
Indoor/outdoor
connection
terminal board
(gap between wires)
Conductor
fully inserted
Conductor over
inserted
Conductor not
fully inserted
ACCEPT
PROHIBITED
PROHIBITED
DISPOSAL OF OUTDOOR UNIT DRAIN WATER
•
If a drain elbow is used, the unit should be placed on a stand which is taller than 3 cm.
•
If the unit is used in an area where temperature falls below 0°C for 2 or 3 days in
succession, it is recommended not to use a drain elbow, for the drain water freezes
and the fan will not rotate.
Install the hose at an angle so that
the water smoothly fl ows out.
Hose
Drain elbow
SELECT THE BEST LOCATION
OUTDOOR UNIT
If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from the condenser is not obstructed.
There should not be any animal or plant which could be affected by hot air discharged.
Keep the spaces indicated by arrows from wall, ceiling, fence or other obstacles.
Do not place any obstacles which may cause a short circuit of the discharged air.
If piping length is over the [piping length for additional gas], additional refrigerant should be added as shown in the table.
Table A
MODEL
Std.
Length
(m)
Min. Piping
Length
(m)
Max. Total
Length
(m)
Max.
Elevation
(m)
Piping Length
for add. Gas
(m)
Additional
Refrigerant
(g/m)
Wall
Mounted
Indoor
A
min
(m
2
)
Mini
Cassette
Indoor
A
min
(m
2
)
Ducted
Indoor
A
min
(m
2
)
CU-2Z35***,
CU-2Z41***,
CU-2Z50***
5 m /
indoor
unit
3 m /
indoor unit
30
10
20
15
1.54
1.03
1.03
Note:
(1) It is possible to extend the piping length of one unit up to 20 meters. However, the total piping length must not exceed 30 meters.
(2) If the length exceeds 20 meters, refrigerant of 15g per meter must be added.
A
min
= (
m
c
/ (2.5 x (
LFL
)
(5/4)
x
h
0
)) ²
A
min
= Required minimum room area, in m²
m
c
= Refrigerant charge amount in appliance, in kg
LFL
= Lower fl ammable limit (0.306 kg/m³)
h
0
= Installation height of the appliance (1.8 m for Wall Mounted, 2.2 m for Mini Cassette & Ducted).
Installation parts you
should purchase ( )
Attached accessories
Qty.
1
Drain elbow
Power supply cord ( )
Gas side piping ( )
Liquid side piping ( )
Connection cable ( )
Additional drain hose ( )
100 mm
or more
1000 mm
or more
100 mm
or more
300 mm
or more
•
This illustration is for
explanation purposes only.
L
N
1
2
3
1
2
3
Unit B
Unit A
Power
Supply Cord
Isolating
Devices
Indoor
Unit B
Indoor
Unit A
Indoor & outdoor
connection cable
INSTALLATION INSTRUCTION (OUTDOOR UNIT)
Control Board Cover
(metal)
Screws
PIPING INSULATION
CONNECT THE CABLE TO THE OUTDOOR UNIT
Model
A
B
C
D
CU-2Z35***,
CU-2Z41***,
CU-2Z50***
540 mm
160 mm
18.5 mm
330 mm
•
After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram.
1.
Fix the unit on concrete or rigid frame fi rmly and horizontally by bolt nut (ø10 mm).
2.
When installing at roof, please consider strong wind and earthquake.
Please fasten the installation stand firmly with bolt or nails.
A
B
C
D
Please make fl are after inserting fl are nut (locate at joint portion of tube
assembly) onto the copper pipe. (In case of using long piping)
Connect the piping
•
Align the center of piping and suffi ciently tighten the fl are nut with fi ngers.
•
Further tighten the fl are nut with torque wrench in specifi ed torque as stated
in the table.
Decide piping length and then cut by using pipe cutter.
Remove burrs from cut edge.
Make flare after inserting the flare nut (locate at valve) onto the copper pipe.
Align center of piping to valve and then tighten with torque wrench to the
specified torque as stated in the table.
Do not overtighten, overtightening may cause
gas leakage.
Piping size
Torque
6.35 mm (1/4")
[18 N•m (1.8 kgf•m)]
9.52 mm (3/8")
[42 N•m (4.3 kgf•m)]
12.7 mm (1/2")
[55 N•m (5.6 kgf•m)]
15.88 mm (5/8")
[65 N•m (6.6 kgf•m)]
19.05 mm (3/4")
[100 N•m (10.2 kgf•m)]
Connecting The Piping to Indoor
Connecting The Piping to Outdoor Multi
Spanner or Wrench
Torque wrench
1
1
2
3
4
SELECT THE BEST LOCATION
(Refer to “Select the best location” section)
INSTALL THE OUTDOOR UNIT
CONNECT THE PIPING
AIR TIGHTNESS TEST ON THE REFRIGERATING SYSTEM
Short circuit of the blow-out air
Smooth fl ow of the drain
Reliable thermal insulation
Leakage of refrigerant
CHECK ITEMS
Mistake in wiring
Reliable connection of the grand wire
Looseness in terminal screw
Grounding/Earth connection
AIR PURGING METHOD IS PROHIBITED FOR R32 SYSTEM
ENGLISH
ACXF60-06550
PRINTED IN MALAYSIA
2/2
Before system charged with refrigerant and before the refrigerating system in put into operation, below site test procedure and
acceptance criteria shall be verifi ed by the certifi ed technicians, and/or the installer:-
Step 1: Pressure test for refrigerant leak detection:
1) Steps for pressure test, in accordance to ISO 5149.
2) Evacuate the system from refrigerant before the leak test, attach the gauge manifold set correctly and tightly. Charging hose of
Low side connect to Gas side. (Charging hose of High side connect to Liquid side if applicable.)
3) Adjust the knob on the service valves, and regulator on the gauge set, so that test gas can be inserted through the centre manifold
of the gauge set.
4) Insert Nitrogen gas into the system through the centre manifold and wait until the pressure within the system to reach about 1MPa
(10 BarG) wait for a few hours and monitor the pressure reading on the gauges.
5) Please note that the system’s pressure may rise slightly if the test is carried out on mid day, due to temperature rise. The inverse
may happen when there is temperature drop at night. However, this variation will be minimal.
6) Waiting time depends on the size of the system. Larger systems may require 12 hours of waiting time. Leak detection within
smaller system can be achieved in 4 hours.
7) Check if there is a constant pressure drop. Move to next step “Step 2: Refrigerant leak detection...” if there is any pressure drop.
Otherwise, release the Nitrogen gas and, move to “Step 3: Evacuation of the equipment”.
8) Next, insert a small amount of same refrigerant into the system through the centre hose, until the pressure reaches about 1MPa
(10 BarG).
7
4
8
3
N
2
R-###
2
2
(Low/Gas) pressure gauge
(High/Liquid) pressure gauge
An example illustrations of setup for
refrigerant leak detection.
Step 2: Refrigerant leak detection through Electronic halogen leak detector and/or ultrasonic leak detector:
1) Use any one of below detector to check leaking.
i) Electronic halogen leak detector.
i-a) Switch on the unit.
i-b) Cover the test area from direct draft.
i-c) Pass the detection probe near test area and wait for audible and visible signals.
ii) Ultrasonic Leak Detector
ii-a) Make sure the area is quiet.
ii-b) Switch on the ultrasonic leak detector.
ii-c) Move the probe along your air conditioning system to test for leaks, and mark for repair.
2) Any leak detected at this level shall be repaired and retested, starting from “Step 1: Pressure test”.
NOTE:
-
Always recover the refrigerant and Nitrogen gas into recovery cylinder after completion of a test.
-
You must use the detection equipment with Detectable Leak Rate of 10
-6
Pa.m
3
/s or better.
-
Do not use refrigerant as test medium for system with total refrigerant charge more than 5kg.
-
Test shall be performed with dry Nitrogen or another non-fl ammable, non-reactive, dried gas. Oxygen, air or mixtures containing
them shall not be used.
Step 3: Evacuation of the equipment:
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.
There is no extra refrigerant in the outdoor unit for air purging.
1.
Connect a charging hose with a push pin to the Low and High side
of a charging set and the service port of the 3-way valve.
•
Be sure to connect the end of the charging hose with the push
pin to the service port.
2.
Connect the center hose of the charging set to a vacuum pump
with check valve, or vacuum pump adaptor.
3.
Turn on the power switch of the vacuum pump and make sure that
the needle in the gauge moves from 0 cmHg (0 MPa) to
–76 cmHg (–0.1 MPa). Then evacuate the air for approximately
10 minutes.
4.
Close the Low and High side valves of the charging set and turn
off the vacuum pump. Make sure that the needle in the gauge
does not move after approximately 5 minutes.
Note : BE SURE TO FOLLOW THIS PROCEDURE IN ORDER
TO AVOID REFRIGERANT GAS LEAKAGE.
5.
Disconnect the charging hose from the vacuum pump and from
the service of the 3-way valves.
6.
Tighten the service port caps of the 3-way valve at a torque of
18 N•m with a torque wrench.
7.
Remove the valve caps of the both 3-way valves. Position both of
the valves to “OPEN” using a hexagonal wrench (4 mm).
8.
Mount valve caps onto the both 3-way valves.
•
Be sure to check for gas leakages.
Indoor Unit
Outdoor Unit
3-way valve
3-way valve
Close
Close
3-way valve
3-way valve
Indoor Unit
Vacuum
pump
Vacuum pump
adaptor
Gas side
Gas side
Liquid side
Liquid side
OPEN
OPEN
Close
Close
CAUTION
•
If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1MPa), in step
3
above take the following measure:
- If the leak stops when the piping connections are tightened further, continue working from step
3
.
- If the leak does not stop when the connections are retightened, repair location of leak.
- Do not release refrigerant during piping work for installation and reinstallation.
- Take care of the liquid refrigerant, it may cause frostbite.
Refrigerant tubing shall be protected against mechanical damage.
CAUTION
Use a material with good heat-resistant properties as the heat
insulation for the pipes. Be sure to insulate both the gas-side
and liquid-side pipes. If the pipes are not adequately insulated,
condensation or water leakages may occur.
Liquid-side pipes
Material shall
withstand 120°C or
higher
Gas-side pipes
