Panasonic CU-2E18NBU Installation Manual
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OUTDOOR UNIT
SELECT THE BEST LOCATION
1
5
CONNECT THE CABLE TO THE OUTDOOR UNIT
PRINTED IN MALAYSIA
ENGLISH
F615177
•
Setting of Cooling only operation.
The equipment can be set to cooling only operation by setting the JP line on
the outdoor unit display circuit board.
[Setting method]
Switch off power supply to the outdoor unit, cut JPN1 (COOL ONLY) as shown in
Figure 1.
After cutting off the wire, switch ON the equipment power.
When setting the cooling only operation, Heating operation is disabled.
ODOUR WASH operation is disabled. (Odour cut operation is still enabled.)
To revert the setting back to heat pump operation, switch OFF the equipment power,
reconnect JP1 (COOL ONLY) back to short circuit condition and switch ON the
equipment power.
F615177
•
Read the following “SAFETY PRECAUTIONS” carefully before installation.
•
Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model to be
installed.
•
The caution items stated here must be followed because these important contents are related to safety. The meaning of each indication used is as
below.
Incorrect installation due to ignoring of the instruction will cause harm or damage, and the seriousness is classifi ed by the following indications.
Required tools for Installation Works
1 Philips screw driver
2 Level gauge
3 Electric drill, hole core drill (ø2 3/4")
4 Hexagonal wrench (5/32")
5 Spanner
6 Pipe cutter
7 Reamer
8 Knife
9 Gas leak detector
10 Measuring tape
11 Thermometer
12 Megameter
13 Multimeter
14 Torque wrench
13.3 Ibf.ft
31.0 Ibf.ft
40.6 Ibf.ft
47.9 Ibf.ft
73.8 Ibf.ft
15 Vacuum pump
16 Digital Micron Gauge
Reamer
2. To remove burrs
Point down
Pipe
1. To cut
Bar
0 – 5/256"
Copper pipe
When properly fl ared, the internal surface
of the fl are will evenly shine and be of
even thickness. Since the flare part
comes into contact with the connections,
carefully check the fl are fi nish.
Improper fl aring
Inclined Surface
damaged
Cracked Uneven
thickness
3. To fl are
Bar
Red arrow mark
Handle
Core
Yo k e
Clamp handle
QUICK GUIDE
PIPING & ELECTRICAL SPECIFICATION
Example:
If total piping length of all installed indoor units is at 68.6 ft, the quantity of additional refrigerant should be 0.6 oz .......... (68.6 – 65.6) ft x 0.2 oz/ ft = 0.6 oz.
SAFETY PRECAUTIONS
WARNING
This indication shows the possibility of causing death or serious injury.
CAUTION
This indication shows the possibility of causing injury or damage to properties only.
Symbol with white background denotes item that is PROHIBITED from doing.
Symbol with dark background denotes item that must be carried out.
WARNING
Do not install outdoor unit near handrail of veranda. When installing air-conditioner unit on veranda of a high rise building, child may climb up to outdoor
unit and cross over the handrail causing an accident.
Do not use unspecifi ed cord, modifi ed cord, joint cord or extension cord for power supply cord. Do not share the single outlet with other electrical
appliances. Poor contact, poor insulation or over current will cause electrical shock or fi re.
Do not tie up the power supply cord into a bundle by band. Abnormal temperature rise on power supply cord may happen.
Do not insert your fi ngers or other objects into the unit, high speed rotating fan may cause injury.
Do not sit or step on the unit, you may fall down accidentally.
Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and prevent breathing.
When installing or relocating air conditioner, do not let any substance other than the specifi ed refrigerant, eg. air etc. mix into refrigeration cycle (piping).
Mixing of air etc will cause abnormal high pressure in refrigeration cycle and result in explosion, injury etc.
Do not add or replace refrigerant other than specifi ed type. It may cause product damage, burst and injury etc.
•
For R410A model, use piping, fl are nut and tools which is specifi ed for R410A refrigerant. Using of existing (R22) piping, fl are nut and tools may cause
abnormally high pressure in the refrigerant cycle (piping), and possibly result in explosion and injury.
•
Thickness or copper pipes used with R410A must be more than 1/32". Never use copper pipes thinner than 1/32".
•
It is desirable that the amount of residual oil is less than 0.0008 oz/ft..
Engage authorized dealer or specialist for installation. If installation done by the user is incorrect, it will cause water leakage, electrical shock or fi re.
Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fi re.
Use the attached accessories parts and specifi ed parts for installation. Otherwise, it will cause the set to fall, water leakage, fi re or electrical shock.
Install at a strong and fi rm location which is able to withstand the set’s weight. If the strength is not enough or installation is not properly done, the set will
drop and cause injury.
For installation work, follow all electrical, building, plumbing, local codes, regulations and these installation instructions. If electrical circuit capacity
is not enough or a defect is found in electrical work, it will cause electrical shock or fi re.
Do not use spliced wires for indoor / outdoor connection cable. Use the specifi ed indoor / outdoor connection cable, refer to instruction 5 INDOOR/
OUTDOOR UNIT ELECTRICAL WIRING and connect tightly for indoor/outdoor connection. Clamp the cable so that no external force will have impact on
the terminal. If connection or fi xing is not perfect, it will cause heat-up or fi re at the connection.
Wire routing must be properly arranged so that control board cover is fi xed properly. If control board cover is not fi xed perfectly, it will cause fi re or electrical
shock.
This equipment must installed with an Earth Leakage Circuit Breaker (ELCB) or Ground Fault Current Interrupter (GFCI) or Appliance Leakage Current
Interrupter (ALCI) that has been certifi ed by an NRTL Certifi ed Testing Agency and that is suitable for the voltages and amperages involved. Otherwise, if
may cause electrical shock and fi re in case of equipment breakdown.
During installation, install the refrigerant piping properly before running the compressor. Operation of compressor without fi xing refrigeration piping and
valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.
During pump down operation, stop the compressor before removing the refrigeration piping. Removal of refrigeration piping while compressor is operating
and valves are opened will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.
Tighten the fl are nut with torque wrench according to specifi ed method. If the fl are nut is over-tightened, after a long period, the fl are may break and cause
refrigerant gas leakage.
After completion of installation, confi rm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant comes into contact with fi re.
Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant comes into contact with fi re.
This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, earth of lightning rod and telephone. Otherwise, it may
cause electrical shock in case of equipment breakdown or insulation breakdown.
CAUTION
Do not install the unit at place where leakage of fl ammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fi re.
Do not release refrigerant during piping work for installation, re-installation and during repairing a refrigeration parts. Take care of the liquid refrigerant, it
may cause frostbite.
Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.
Do not touch the sharp aluminium fi n, sharp parts may cause injury.
Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture.
Select an installation location which is easy for maintenance.
Power supply connection to the room air conditioner.
Power supply cord shall be UL listed or CSA approved 3 conductor with minimum AWG12 wires.
Power supply point should be in an easily accessible place for power disconnection in case of emergency.
In some countries, permanent connection of this air conditioner to the power supply is prohibited.
Fix power supply connection to a circuit breaker for permanent connection.
Use NRTL approved fuse or circuit breaker (rating refers to name plate) for permanent connection.
Installation work.
It may need two people to carry out the installation work.
The items to be followed are classifi ed by the symbols:
•
Carry out test running to confi rm that no abnormality occurs after the installation. Then, explain to user the operation, care and maintenance as stated
in instructions. Please remind the customer to keep the operating instructions for future reference.
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder entering the pipe.
3. Please make fl are after inserting the fl are nut onto the copper pipes.
CUTTING AND FLARING THE PIPING
Indoor(ID) & Outdoor(OD) units:
Possible Combination Patterns
Capacity
(Btu/h)
Refrigerant
Piping size
Standard
pipe
length
Max.
Elevation
Min. pipe
length for
each ID
unit
Max. from
OD to
each ID
Max.
total
length
Min. total pipe
length for
additional gas
Additional
refrigerant
Power
supply
Power
supply
wire size
OD-ID
connection
wire size
Gas Liquid
Outdoor (OD): CU-2E18NBU
Indoor (ID): 2 UNITS OF CS-E9NKUAW
16700 R410A
ø3/8"
(ø9.52mm)
ø1/4"
(ø6.35mm)
24.6 ft
See
Step 1
9.8 ft 82.0 ft 164.0 ft 65.6 ft 0.2 oz / ft
208/230V
60 Hz
MCA 20A
MOP 25A
AWG12 AWG16
Outdoor (OD): CU-2E18NBU
Indoor (ID): 2 UNITS OF CS-E12NKUAW
Outdoor (OD): CU-2E18NBU
Indoor (ID): 1 UNIT OF CS-E9NKUAW
+ 1 UNIT OF CS-E12NKUAW
Outdoor Unit Installation Diagram
Installation parts you
should purchase ()
•
This illustration is for explanation purposes only.
* Note:
Respective indoor unit installation procedure shall refer to
instruction manual provided in the indoor unit packaging.
It is advisable to avoid more
than 2 blockage directions.
For better ventilation &
multiple-outdoor installation,
please consult authorized
dealer/specialist.
•
If total piping length of all indoor units exceeds the
minimum length listed above, additionally charge with
0.2 oz of refrigerant (R410A) for each additional feet of
piping.
3/8" Gas side piping ()
1/4" Liquid side piping ()
Additional drain hose ()
Connecting cable ()
(Conduit)
Power supply cord ()
(Conduit)
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.
Recommended installation height for outdoor unit should be above
the seasonal snow level.
Refrigerant piping size
Outdoor Unit CU-2E18**
Liquid - side ø1/4" thickness 1/32"
Gas - side ø3/8" thickness 1/32"
Outdoor Unit CU-2E18**
Min. total piping length for
additional gas
65.6 ft
Allowable piping length
Outdoor Unit CU-2E18***
Allowable piping length of each indoor unit (min. ~ max.) 9.8 ft ~ 82.0 ft
Allowable total piping length of all indoor unit 164.0 ft or less
Height difference between indoor and outdoor unit
Outdoor unit located on upper side
g
49.2 ft or less
Outdoor unit located otherwise
h
24.6 ft or less
Height difference between indoor unit
Outdoor unit located on upper side
i
24.6 ft or less
Outdoor unit located otherwise
j
49.2 ft or less
Outdoor unit located
on upper side
Outdoor unit located
otherwise
j
b
j
h
g
i
Outdoor unit
Outdoor unit
Outdoor unit
Indoor unit Indoor unit
Indoor unit
Outdoor Unit Installation Guidelines
•
Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airfl ow, follow the installation guidelines below.
•
For any of the below installation patterns, the wall height on the exhaust side should be 47
1
/4" or less.
Wall facing one side
More than 3 15/16"
Side view Top view
47 1/4"
or less
More than 39 3/8"
More than 3 15/16" More than 39 3/8"
More than 3 15/16"
More than 11 13/16"
More
than
3 15/16"
More than 39 3/8"
More than 3 15/16"
Walls facing two side Walls facing three side
Top view
Unit : inch
•
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 with bolt nut (ø13/32").
2. When installing on a roof, please consider strong winds and earthquakes.
3. Please fasten the installation stand fi rmly with bolt or nails.
2
INSTALL THE OUTDOOR UNIT
AB
C
D
Model A B C D
CU-2E18*** 24-1/8" 5-5/32" 5/8" 14-3/16"
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge.
Make fl are after inserting the fl are nut (locate at valve) onto the copper pipe.
Align center of piping to valves and then tighten with torque wrench to the specifi ed
torque as stated in the table.
3
CONNECT THE PIPING
•
Remove the control board cover (resin) from the outdoor unit by loosening three
screws.
Screws
Control Board Cover (Resin)
Flare Nut
Torque Wrench for Flare Nut
(Connection Pipe)
(Connection Pipe)
Male side
Female side
Applicable to
Liquid and Gas side of
CS-E9***
CS-E12***
Torque Wrench for Flare Nut
Liquid side
Gas side
Flare Nut
Screw
Pressure test to system to 400 PSIG with dry nitrogen, in stages. Thoroughly leak check the system.
If the pressure holds, release the nitrogen and proceed to section 4.
Connecting the Piping to Outdoor Unit
Gas Leak Checking
Do not overtighten, over tightening may cause gas leakage.
Piping size Torque
1/4" (0.02 ft) [18 N•m (13.3 Ibf. ft)]
3/8" (0.03 ft) [42 N•m (31.0 Ibf. ft)]
1/2" (0.04 ft) [55 N•m (40.6 Ibf. ft)]
5/8" (0.05 ft) [65 N•m (47.9 Ibf. ft)]
3/4" (0.06 ft) [100 N•m (73.8 Ibf. ft)]
1. Remove Control Board Cover (Metal) by loosening 2
screws.
2. Remove Valve Cover (Metal) by loosening 2 screws.
3. Remove Plugs.
4. Fix the conduit connectors to the knock out holes with
lock-nuts, then secure them.
5. Connecting wire between indoor unit and outdoor unit
should be UL listed or CSA approved 4 conductor
wires minimum AWG16 in accordance with local
electric codes.
6. Wire Connection to the power supply (208/230V 60Hz)
through circuit breaker.
•
Connect the UL listed or CSA approved wires
minimum AWG12 to the terminal board, and connect
to other end of the wires to circuit breaker.
7. Connect the power supply cord and connecting wires
between indoor unit and outdoor unit according to the
diagram as shown.
Connectors
Control Board Cover
(Metal)
Unit A Unit B
8. For wire stripping and connection requirement, refer to the diagram below.
9. Secure the power supply cord and connecting cables onto the control board with the holder.
10. Attach the control board cover (metal and resin) and valve cover back to the original position with screw.
•
Earth wire must be Yellow/
Green (Y/G) in colour and
longer than other AC wires for
safety reasons.
Plugs
Knock Out Holes
Side Panel
Valve Cover
(Metal)
Screws
Lock Nuts
Screws
Top Panel
4
EVACUATION OF THE EQUIPMENT
Power Supply
Terminals on the indoor unit 1
1L1 L2
1
1
2
2
2
2
3
3
3
3
Colour of wires (Connecting cable)
Terminals on the outdoor unit
(Power supply cord)
(UNIT B)(UNIT A)
Power Supply
Cord
Indoor & outdoor
connection wire
Indoor
Unit A
Indoor
Unit B
This equipment must be
properly earthed.
Wire stripping
25/128"
or more
(gap between
wires)
No loose strand when inserted
Indoor/outdoor
connecting
terminal board
25/64" ± 5/128"
WIRE STRIPPING AND CONNECTING REQUIREMENT
Conductor fully
inserted
Conductor over
inserted
Conductor not
fully inserted
ACCEPT PROHIBITED PROHIBITED
WHEN INSTALLING AN AIR CONDITIONER, BE SURE
TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND
PIPES in the following procedure.
1. Connect a charging hose with a push pin to the Low
side of a charging set and the service port of the gas
side 3-way valve.
2. Connect the micron gauge between vacuum pump
and service port of outdoor units.
3. Turn on the power switch of the vacuum pump and
make sure that connect digital micron gauge and to
pull down to a value of 500 microns.
4. To make sure micron gauge a value 500 microns and
close the low side valve of the charging set and turn
off the vacuum pump.
5. Disconnect the vacuum pump house from the service
port of the 3-way valve.
6. Tighten the service port caps of gas side 3-way valve
at a torque of 13.3 Ibf.ft 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 (5/32").
8. Mount valve caps onto the 2-way valve and 3-way
valve.
•
Be sure to check for gas leakage.
Outdoor unit
Liquid side
Gas
side
Vacuum
pump
Liquid side 3-way valve
Gas side 3-way valve
Liquid side
Gas
side
Tube connector
Tube connector
Tube connector
Tube connector
Close
Close
Indoor Unit
Indoor Unit
CAUTION
•
If micron gauge value does not descend 500 microns, take the following measures:
- 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 when handling the liquid refrigerant, it may cause frostbite.
6
HEAT INSULATION
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 248°F or
higher
Gas-side pipes
•
Operate the pump down according to the following procedures.
1. Confi rm the valve on the liquid side and gas side is open.
2. Press PUMP DOWN switch (SW1) on the display printed circuit board for more
than 5 seconds. Pump down (cooling) operation is performed for 15 minutes.
3. Set the liquid side 3 way valve to close position and wait until the pressure gauge
indicates 1.45 PSI.
4. Immediately set the gas side valve to close position and then press the PUMP
DOWN switch (SW1) to stop the pump down operation.
Note: Pump down operation will stop automatically after 15 minutes if PUMP
DOWN switch (SW1) is not pressed again.
Pump down operation cannot be restarted until 3 minutes after compressor
is stopped.
This product is capable of correcting wiring errors automatically by following these
procedures.
1. Confi rm the valve on the liquid side and gas side is open.
2. Press WIRING CHECK switch (SW3) on the display printed circuit board for
more than 10 seconds to start wiring check operation.
3. Wiring check process will complete in approximately 10 minutes. However,
wiring check operation will not start within 3 minutes after compressor
is stopped. When outdoor air temperature is less than 41°F or unit is
malfunctioning, wiring check will not start. (See NOTE 2)
The LED 2 to 6 in display printed circuit board inside the outdoor unit indicate
whether correction is possible or not and the status of the correction, as shown
in the table below.
1. For two rooms, LED 4 and 5 are not illuminated after wiring operation is complete.
2. If the outdoor air temperature is less than 41°F or unit has abnormality, wiring operation will not start.
3. After wiring check operation is complete, LED indication will be illuminated until normal operation starts.
4. Follow the product diagnosis procedure. (Check the diagnostic label at the control board cover.)
5. When LED 1 only is illuminated, this indicates that outdoor unit is operating normally.
NOTE
Close
Hexagonal
wrench
Liquid shut-off valve
Gas shut-off valve
Valve lid
O: Flashing
If automatic correct is impossible, check the indoor unit wiring and piping manually.
Wiring error check
LED lighting sequence after a wiring correction.
Order of LED fl ashing: 3--> 2
Wiring automatic correct example
Terminal block
From Room B
to the “living
room”
From Room A to the
“bedroom”
PUMP DOWN OPERATION
COOLING ONLY OPERATION
DISPOSAL OF OUTDOOR UNIT DRAIN WATER
WIRING ERROR CHECK
LED 2 3 4 5 Message
Status
O O O O Pump down operation progress
O O O 3 minutes before operation end
O O 2 minutes before operation end
O 1 minute before operation end
Pump down operation end
LED23456
Message
ROOM A B – – –
Status
All fl ashing Automatic correction impossible
LED 2, 4, 6 and LED 3, 5 alternatively fl ashing Wiring check in progress
Flashing one after another Automatic correction completed
Other than above Unit has abnormally (Note 4)
CHECK ITEMS
Short circuit of the blow-out air
Smooth fl ow of the drain
Reliable thermal insulation
Leakage of refrigerant
Mistake in wiring
Reliable connection of the grand wire
Looseness in terminal screw
Grounding/Earth connection
ACCESSORIES SUPPLIED WITH OUTDOOR UNIT
•
The following parts are supplied as accessories with each outdoor unit.
Check that all accessory parts are present before installing the outdoor unit.
HEAT PUMP-TYPES ONLY
Part name Qty. Diagram Application
Drain elbow 1
For connecting the drain
pipe
•
If a drain elbow is used, the unit should be placed on a stand which is taller than 5 cm.
•
If the unit is used in an area where temperature falls below 32˚F 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.
Drain elbow
Fig. 1
SW1 (PUMP DOWN)
SW2 (OPERATION
TEST)
SW3 (WIRING
CHECK)
L1
L2
3
3
2
2
1
1
OFF ON
OFF ON
LED 1
LED 2
LED 3
LED 4
LED 5
LED 6
JP1 (COOL
ONLY)
1
Summary of Contents
Page 1 - OUTDOOR UNIT
OUTDOOR UNITSELECT THE BEST LOCATION15CONNECT THE CABLE TO THE OUTDOOR UNIT PRINTED IN MALAYSIAENGLISHF615177 •Setting of Cooling only operation.The e
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