Panasonic CU-2E18NBU-1 Installation Manual

OUTDOOR UNIT

SELECT THE BEST LOCATION

CONNECT THE CABLE TO THE OUTDOOR UNIT

PRINTED IN MALAYSIA

ENGLISH

F615180

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Read the following “SAFETY PRECAUTIONS” carefully before installation.

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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.

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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

Yok 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.

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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.

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Thickness or copper pipes used with R410A must be more than 1/32". Never use copper pipes thinner than 1/32".

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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:

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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

wire size

OD-ID

connection

wire size

Gas Liquid

Outdoor (OD): CU-2S18NBU-1 Indoor (ID): 2 UNITS OF CS-S9NKUW-1

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-2S18NBU-1 Indoor (ID): 2 UNITS OF CS-S12NKUW-1

Outdoor (OD): CU-2S18NBU-1 Indoor (ID): 1 UNIT OF CS-S9NKUW-1 + 1 UNIT OF CS-S12NKUW-1

Outdoor Unit Installation Diagram

Installation parts you should purchase ()

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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.

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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-2S18*** Liquid - side ø1/4" thickness 1/32"

Gas - side ø3/8" thickness 1/32"

Outdoor Unit CU-2S18***

Min. total piping length for additional gas

65.6 ft

Allowable piping length

Outdoor Unit CU-2S18***

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

49.2 ft or less

Outdoor unit located otherwise

24.6 ft or less

Height difference between indoor unit

Outdoor unit located on upper side

24.6 ft or less

Outdoor unit located otherwise

49.2 ft or less

Outdoor unit located on upper side

Outdoor unit located otherwise

Outdoor unit

Indoor unit Indoor unit

Indoor unit

Outdoor Unit Installation Guidelines

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Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airﬂ ow, follow the installation guidelines below.

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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"

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

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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 hor izontally 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.

INSTALL THE OUTDOOR UNIT

Model A B C D

CU-2S18*** 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.

CONNECT THE PIPING

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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)

Male side

Female side

Applicable to Liquid and Gas side of CS-S9*** CS-S12***

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.

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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.

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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

EVACUATION OF THE EQUIPMENT

Power Supply

Terminals on the indoor unit 1

1L1 L2

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.

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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

Indoor Unit

CAUTION

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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.

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

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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

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”

Fig. 1

SW1 (PUMP DOWN)

SW2 (OPERATION TEST) SW3 (WIRING CHECK)

LED 1 LED 2 LED 3 LED 4 LED 5 LED 6

PUMP DOWN OPERATION

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

Blocked exhaust air ﬂ ow from outdoor unit

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

OFF ON