Panasonic CS-Z25UD3EAW / CS-Z35UD3EAW / CS-Z50UD3EAW / CS-Z60UD3EAW / CU-Z25UBEA / CU-Z35UBEA / CU-Z50UBEA / CU-Z60UBEA Service Manual ▷ View online
49
12.2 Outdoor Unit
12.2.1 Select the Best Location
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
Horse
Power
(HP)
Piping size
Std.
Length
A
(m)
Max
Elevation
B
(m)
Min.
Piping
Length
(m)
Max.
Piping
Length
(m)
Additional
Refrigerant
(g/m)
Piping
Length for
add. gas
(m)
Indoor
A
min
(m
2
)
Indoor
A
min
(m
2
)
Indoor
A
min
(m
2
)
Gas Liquid
2.2m for
mini
cassette
2.5m for
mini
cassette
2.2m for
ducted
2.5m for
ducted
0.6m for
floor console
Z25**** 1.0HP 9.52
mm
(3/8
"
)
6.35
mm
(1/4
"
)
5
15 3 20 10 7.5
0.64
0.50 0.64 0.50 8.67
Z35**** 1.5HP
15
3
20
10
7.5
0.71 0.55 0.71 0.55 9.55
Z50**** 2.0HP 12.7
mm
(1/2
"
)
20 3 30 15 7.5
1.37
1.06 1.37 1.06 18.48
Z60**** 2.25HP
20
3
30
15
7.5
1.37 1.06 1.37 1.06 N/A
Example: For Z25****
If the unit is installed at 10 m distance, the quantity of additional refrigerant should be 25 g .... (10-7.5) m × 10 g/m =
25 g.
A
min
= (M / (2.5 × (LFL)
(5/4)
× h
0
))
2
A
min
= Required minimum room area, in m
2
M
= Refrigerant charge amount in appliance, in kg
LFL = Lower flammable limit (0.306 kg/m
3
)
h
0
= Installation height of the appliance: (2.2m for mini cassette & ducted is standard reference installed height)
(2.5m for mini cassette & ducted is minimum installed height given by
manufacturer)
(0.6m for floor console)
manufacturer)
(0.6m for floor console)
•
This illustration is for
explanation purposes only.
explanation purposes only.
It is advisable to avoid
more than 2 blockage
directions. For better
ventilation & multiple-
outdoor installation,
please consult authorized
dealer/specialist.
directions. For better
ventilation & multiple-
outdoor installation,
please consult authorized
dealer/specialist.
Installation parts you
should purchase ( )
should purchase ( )
Additional
drain hose ( )
drain hose ( )
1/4" Liquid
side piping ( )
side piping ( )
Gas side
piping ( )
piping ( )
Connection
cable ( )
cable ( )
Power supply
cable ( )
cable ( )
100 mm
or more
100 mm
or more
or more
1000 mm
or more
300 mm
or more
50
12.2.2 Install the Outdoor Unit
After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram.
1 Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm).
2 When installing at roof, please consider strong wind and earthquake.
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
Model A
B
C
D
Z25****
570 mm
105 mm
18.5 mm
320 mm
Z35****
540 mm
160 mm
18.5 mm
330 mm
Z50****
613 mm
131 mm
24 mm
360.5 mm
Z60****
12.2.3 Connect the Piping
12.2.3.1 Connecting
the Piping to Indoor
For connection joint location at outside building
Please make flare after inserting flare nut (locate at
joint portion of tube assembly) onto the copper pipe.
(In case of using long piping)
Connect the piping
Please make flare after inserting flare 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 sufficiently tighten
the flare nut with fingers.
Further tighten the flare nut with torque wrench in
specified torque as stated in the table.
Torque
wrench
wrench
Spanner or
Wrench
Wrench
For connection joint location at inside building
Refer to indoor installation instruction.
12.2.3.2 Connecting
the
Piping to Outdoor
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.
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)]
51
12.2.4 Evacuation of the Equipment
WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND
PIPES in the following procedure.
PIPES in the following procedure.
Lo
Hi
Indoor unit
Outdoor unit
CLOSE
Liquid side
Gas side
OPEN
Vacuum
pump
pump
Two-way valve
Closed
Three-way valve
Closed
1 Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way
valve.
o
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.
3 Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from
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 approximately ten minutes.
4 Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the
gauge does not move after approximately five minutes.
Note : BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.
Note : BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.
5 Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
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 both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN”
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 both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN”
using a hexagonal wrench (4 mm).
8 Mount valve caps onto the 2-way valve and the 3-way valve.
o
Be sure to check for gas leakage.
If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), 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.
52
12.2.5 Connect the Cable to the Outdoor Unit
(FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT)
1 Remove the control board cover from the unit by loosening the screw.
2 Cable connection to the power supply through Isolating Devices (Disconnecting means).
2 Cable connection to the power supply through Isolating Devices (Disconnecting means).
o
Connect approved type polychloroprene sheathed power supply cord 3 x 1.5 mm
2
(1.0 ~ 1.5HP) or 3 x
2.5 mm
2
(2.0 ~ 2.25HP) 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 mm
2
flexible 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 connection cable between indoor unit and outdoor unit according to the
diagram below.
3
2
1
t
i
n
u
r
o
o
d
n
i
e
h
t
n
o
s
l
a
n
i
m
r
e
T
Colour of wires (connection cable)
Terminals on the outdoor unit
L
N
1
2
3
(Power supply cord)
Terminals on the isolating devices
(Disconnecting means)
(Disconnecting means)
(L) (N)
5 Secure the power supply cord and connection cable 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 instruction 12.1.6 of indoor unit.
6 Attach the control board cover back to the original position with screw.
7 For wire stripping and connection requirement, refer to instruction 12.1.6 of indoor unit.
Earth Wire
longer
than
others
AC wires
for safety
reason
longer
than
others
AC wires
for safety
reason
Earth Wire
longer than
others
AC wires
for safety
reason
longer than
others
AC wires
for safety
reason
Terminal
Board
Board
Holder
Indoor and outdoor
connection cable
Indoor Unit
Isolating
Devices
Power supply
cord
WARNING
This equipment must be properly earthed.
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.
12.2.6 Piping
Insulation
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.
Click on the first or last page to see other CS-Z25UD3EAW / CS-Z35UD3EAW / CS-Z50UD3EAW / CS-Z60UD3EAW / CU-Z25UBEA / CU-Z35UBEA / CU-Z50UBEA / CU-Z60UBEA service manuals if exist.