Panasonic CS-Z25UD3EAW / CS-Z35UD3EAW / CS-Z50UD3EAW / CS-Z60UD3EAW / CU-Z25UBEA / CU-Z35UBEA / CU-Z50UBEA / CU-Z60UBEA Service Manual ▷ View online
45
12.1.4 Connecting the Drain Piping
Lay the drain piping so as to ensure drainage.
Use a locally purchased VP20 general rigid PVC pipe (outer diameter ø26) for the drain piping and firmly
connect the indoor unit and the drain piping using supplied hose band to ensure that no leakage occurs.
Drain piping located indoor should always be insulated by wrapping with locally purchased insulation (foamed
polyethylene with a thickness of 10 mm or more).
The drain piping should have a downward gradient (1/100 or more) and should be secured by using pipe hanging
equipment to avoid creating hills or traps partway.
Should there be any obstacle preventing the drain piping from being extended smoothly, the drain piping can be
raised outside of the main unit as shown in the illustration below.
Rise
Hill
Trap
300 mm or less
(not a downward gradient)
(not a downward gradient)
500 mm or less
Good
At least 1/100
Drain insulator
0
Drain hose
8
Hard PVC pipe (VP20)
Hose band
9
Unit drain port
Do not use adhesive.
Adhere with
PVC adhesive.
CAUTION
Strictly do not install and extend the drain piping from the main unit drain water outlet horizontally or upward or raised it 50 cm or more.
Doing so may result in poor drainage or drain motor failure.
Do not use drain hose bent at 90° angle. (The maximum permissible bend is 45°.)
12.1.5 Insulating the Refrigerant Piping
After the piping is connected, insulate. (Refer to the illustration)
Wrap fi rmly
with vinyl tape,
leaving no gaps.
with vinyl tape,
leaving no gaps.
Unit side
Wrap fi rmly
with vinyl tape,
leaving no gaps.
with vinyl tape,
leaving no gaps.
Flare insulator
6
Clamper
7
46
12.1.6 Connecting the Indoor/Outdoor Connection Cable
Remove the control box cover and insert the
connection cable into the control box.
Check the color of the wires on the terminal board
and secure them with screws.
Secure the outer sheath of the connection cable
with the cord clamp.
Reattach the control box cover to its original
position.
CAUTION
When the wall is hollow, please be sure to use the
sleeve for tube ass’y to prevent dangers caused by
mice biting the connection cable.
sleeve for tube ass’y to prevent dangers caused by
mice biting the connection cable.
Connection cable between indoor unit and
outdoor unit should be approved polychloroprene
sheathed 4 x 1.5 mm
sheathed 4 x 1.5 mm
2
flexible cord, designation
type 60245 IEC 57 (H05RN-F) or heavier cord.
Allowable connection cable length of each indoor
unit shall be 30 m or less.
o Ensure that the terminal numbers on the
Allowable connection cable length of each indoor
unit shall be 30 m or less.
o Ensure that the terminal numbers on the
indoor unit are connected to the same
terminal numbers on the outdoor unit by the
right coloured wires as shown in the diagram.
terminal numbers on the outdoor unit by the
right coloured wires as shown in the diagram.
o Earth lead wire should be longer than the
other lead wires as shown in the diagram for
electrical safety purpose in case the cord slips
out from the anchorage.
electrical safety purpose in case the cord slips
out from the anchorage.
o Secure the cable onto the control board with
the holder (clamper).
Terminals on the indoor unit
1
2
3
Colour of wires
Terminals on the outdoor unit
1
2
3
Ensure the colour of wires of outdoor unit and the
terminal Nos. are the same to the indoor’s
respectively.
respectively.
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.
Earth wire
Earth wire
(connection cable)
Holder for
connection cable
connection cable
Indoor/outdoor
connection terminal
connection terminal
Indoor/outdoor
connection cable
connection cable
(remote control cable)
Wire remote control
connector
FAN switch (SW2)
“DRAIN TEST” switch
47
12.1.6.1 Wire Stripping and Connecting Requirement
WARNING
RISK OF FIRE
JOINING OF WIRES MAY CAUSE
OVERHEATING AND FIRE.
OVERHEATING AND FIRE.
Do not joint wires
OR
OR
OR
Use complete wire without joining.
Use approved socket and plug with earth pin.
Wire connection in this area must follow to national
wiring rules.
Conductor
over inserted
Conductor
fully inserted
Conductor not
fully inserted
5 mm
or more
Indoor/outdoor
connection
terminal board
connection
terminal board
(gap between wires)
ACCEPT
PROHIBITED
PROHIBITED
Wire stripping
No loose strand
when inserted
when inserted
10 ± 1 mm
12.1.7 Connect the Piping
12.1.7.1 Connecting
the Piping to Indoor
For connection joint of all model (except R32 model)
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
Spanner or
Wrench
Wrench
For connection joint of R32 models
Decide the length.
Cut and remove the tube connectors at indoor
copper pipings (both gas and liquid piping) by
using pipe cutter. Remove burrs from cut edge.
using pipe cutter. Remove burrs from cut edge.
Use pipe expander to expand the end of long
piping.
Align the center of piping and braze the piping
joints.
Indoor copper pipe
Tube connector
(40~50mm)
Brazing point
1. Cut and Remove
2. Expand long pipe
3. Braze both pipe
Braze the piping joints carefully so that the indoor
unit is not damaged by brazing flame.
If necessary, cover with wet clothes to prevent
parts unintentionally overburnt.
If necessary, cover with wet clothes to prevent
parts unintentionally overburnt.
48
12.1.7.2 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.
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.
12.1.7.3 Connecting the Piping to Outdoor Multi
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.
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.
*
For Gas side piping please refer table and diagram below
Outdoor Multi Combination Model
R410A Model
Pipe size (refer
to diagram)
R32 Model
Pipe size (refer
to diagram)
CS-MZ20*
CS-Z25*
CS-Z35*
CS-Z25*
CS-Z35*
CU-2E12*
CU-2E15*
CU-2E18*
CU-3E18*
CU-3E23*
CU-4E23*
CU-4E27*
CU-5E34*
CU-2E15*
CU-2E18*
CU-3E18*
CU-3E23*
CU-4E23*
CU-4E27*
CU-5E34*
CU-2Z35*
CU-2Z41*
CU-2Z50*
CU-3Z52*
CU-3Z68*
CU-4Z68*
CU-4Z80*
CU-5Z90*
CU-2Z41*
CU-2Z50*
CU-3Z52*
CU-3Z68*
CU-4Z68*
CU-4Z80*
CU-5Z90*
CS-Z50*
CU-2E18*
CU-3E18*
CU-3E23*
CU-4E23*
CU-4E27*
CU-5E34*
CU-3E18*
CU-3E23*
CU-4E23*
CU-4E27*
CU-5E34*
(CZ-MA1P)
CU-2Z50*
CU-3Z52*
CU-3Z68*
CU-4Z68*
CU-4Z80*
CU-5Z90*
CU-3Z52*
CU-3Z68*
CU-4Z68*
CU-4Z80*
CU-5Z90*
CS-Z60*
CU-3E23*
CU-4E23*
CU-4E27*
CU-5E34*
CU-4E23*
CU-4E27*
CU-5E34*
(CZ-MA2P)
CU-3Z68*
CU-4Z68*
CU-4Z80*
CU-5Z90*
CU-4Z68*
CU-4Z80*
CU-5Z90*
(CZ-MA2P)
*
Kindly contact authorized dealer for connectivity validity.
Connection pipe
(female side)
Auxiliary pipe
(male side)
Flare Nut
Hall Union
Liquid side
Connection pipe (female side)
Auxiliary pipe (male side)
Flare Nut
Hall Union
Hall Union
Packing
Connection pipe
(female side)
Auxiliary pipe
(male side)
Pipe size reducer (CZ-MA1P)
Flare Nut
Auxiliary pipe
(male side)
(Outdoor)
Auxiliary pipe
(male side)
(Indoor)
Hall Union
Hall Union
Packing
Connection pipe (female side)
Pipe size expander (CZ-MA2P)
Flare Nut
Auxiliary pipe
(male side)
(Outdoor)
(Indoor)
Hall Union
Brazing point
Connection pipe (female side)
Flare Nut
Auxiliary pipe (male side)
(Outdoor)
(Indoor)
Hall Union
Brazing point
Connection pipe (female side)
Flare Nut
Packing
Pipe size expander (CZ-MA2P)
Gas side
12.1.8 Switching
the
High State Switch (SW2)
To increase the air volume, open the control box and on the control board, switch the FAN switch (SW2) to “HI”.
See the diagram for “Connecting the Indoor/Outdoor Connection Cable”.
12.1.9 Note: Enabling long-range remote control
To maintain EMC emission limits, cabling interconnecting the HA terminal and subsequent opto-coupler, must be
no more than 1.9 m length.
Loop four turns of this cable through a suitable small EMC ferrite toroid, and protect with a short length of large
diameter heat-shrink tube.
There is no similar length limit for cable following on from the opto-coupler isolation.
12.1.10 Check the Drainage
Check after connecting the power supply.
Pour approximately 600 cc of water into the drain pan of the main unit using a squeeze bottle, etc.
Press the drain test run switch on the control board in the control box to start the drain motor and check whether
the water drains normally.
(The drain motor operates for approximately 5 minutes and then stops automatically.)
(See the diagram for “Connecting the Indoor/Outdoor Connection Cable”.)
(The drain motor operates for approximately 5 minutes and then stops automatically.)
(See the diagram for “Connecting the Indoor/Outdoor Connection Cable”.)
Heat
exchanger
exchanger
Drain pan
Squeeze bottle
Approximately
600 cc of water
600 cc of water
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