MITSUBISHI ELECTRIC NTXCKS.A112 Series Split System Heat Pump Instruction Manual

MITSUBISHI ELECTRIC NTXCKS.A112 Series Split System Heat Pump

Specifications:

• Product: MITSUBISHI ELECTRIC TRANE HVAC US SPLIT-SYSTEM HEAT PUMP NTXCKS.A112 Series
• Installation Manual: Included
• Remote Controller: TAR-41MAA

Product Usage Instructions

1. Safety Precautions:

Before installing the unit, ensure you read and follow all safety precautions outlined in the manual. It is crucial to report to your supply authority or obtain their consent before connecting the equipment to the power supply system.

1.1. Before Installation (Environment):

Make sure the installation environment meets the specified requirements for safe operation.

1.2. Before Installation or Relocation:

Follow guidelines for proper installation and relocation procedures to avoid damage to the unit.

1.3. Before Electric Work:

Take necessary precautions before carrying out any electrical work to ensure safety.

1.4. Before Starting the Test Run:

Prior to testing the unit, ensure all installation steps are completed correctly and safely.

2. Selecting the Installation Location:

Choose appropriate locations for both the indoor and outdoor units to ensure optimal performance and longevity of the system.

2.1. Indoor Unit:

Ensure the indoor unit is mounted securely on a ceiling strong enough to support its weight.

2.2. Wireless Remote Controller Mounting:

Consider signal reception issues in rooms with inverter type fluorescent lamps when mounting the wireless remote controller.

3. Installation Diagram:

Refer to the provided installation diagram for proper placement and spacing requirements for both indoor and outdoor units.

Frequently Asked Questions

• Q: What should I do if the wireless remote controller signal is not received in rooms with inverter type fluorescent lamps?
  • A: If signal reception is problematic, consider relocating the wireless remote controller to improve signal reception or consult with a professional for further assistance.

“`

MITSUBISHI ELECTRIC TRANE HVAC US
SPLIT-SYSTEM HEAT PUMP NTXCKS.A112 Series

INSTALLATION MANUAL

FOR INSTALLER

For safe and correct use, please read this manual and the outdoor unit installation manual thoroughly before

installing the air-conditioner unit.

MANUEL D’INSTALLATION

POUR L’INSTALLATEUR

Avant d’installer le climatiseur, lire attentivement ce manuel, ainsi que le manuel d’installation de l’appareil

extérieur pour une utilisation sûre et correct.

MANUAL DE INSTALACIÓN

PARA EL INSTALADOR

Para un uso seguro y correcto, lea detalladamente este manual de instalación antes de montar la unidad de

aire acondicionado.

English Français Español

Note: The phrase “Wired remote controller” in this installation manual refers only to the TAR-41MAA. If you need any information for the other remote controller, please refer to either the installation manual or initial setting manual which are included in these boxes.

Safety precautions

Before installing the unit, make sure you read all the “Safety Precautions”. The “Safety Precautions” provide very important points regarding safety. Make sure you follow them. Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.

Symbols used in the text Warning:
Describes precautions that should be observed to prevent danger of injury or death to the user.
Caution:
Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations
: Indicates a part which must be grounded.
: Be sure not to do.
After installation work has been completed, explain the “Safety Precautions,” use, and maintenance of the unit to the customer according to the information in the Operation Manual and perform the test run to ensure normal operation. Both the Installation Manual and Operation Manual must be given to the user for keeping. These manuals must be passed on to subsequent users.

Warning: · Carefully read the labels affixed to the main unit. · Ask a dealer or an authorized technician to install, relocate and repair the
unit. · The user should never attempt to repair the unit or transfer it to another
location. · Do not alter the unit. It may cause fire, electric shock, injury or water leakage. · For installation and relocation work, follow the instructions in the Installation
Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. · The unit must be installed according to the instructions in order to minimize the risk of damage from earthquakes, typhoons, or strong winds. An incorrectly installed unit may fall down and cause damage or injuries. · The unit must be securely installed on a structure that can sustain its weight. · The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation. · If the air conditioner is installed in a small room or closed room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. Should the refrigerant leak and cause the concentration limit to be exceeded, hazards due to lack of oxygen in the room may result. · Keep gas-burning appliances, electric heaters, and other fire sources (ignition sources) away from the location where installation, repair, and other air conditioner work will be performed. If refrigerant comes into contact with a flame, poisonous gases will be released. · Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released. · All electric work must be performed by a qualified technician according to local regulations and the instructions given in this manual. · Use only specified cables for wiring. The wiring connections must be made securely with no tension applied on the terminal connections. Also, never splice the cables for wiring (unless otherwise indicated in this document). Failure to observe these instructions may result in overheating or a fire. · Do not use intermediate connection of the electric wires. · When installing or relocating, or servicing the air conditioner, use only the specified refrigerant written on outdoor unit to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards. The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

· The appliance shall be installed in accordance with national wiring regulations. · This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. · Children should be supervised to ensure that they do not play with the appliance. · The electrical box cover panel of the unit must be firmly attached. · If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. · Use only accessories authorized by Mitsubishi Electric and ask a dealer or an authorized technician to install them. · After installation has been completed, check for refrigerant leaks. If refrigerant leaks into the room and comes into contact with the flame of a heater or portable cooking range, poisonous gases will be released. · Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. · The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater). · Do not pierce or burn. · Be aware that refrigerants may not contain an odour. · Pipe-work shall be protected from physical damage. · The installation of pipe-work shall be kept to a minimum. · Compliance with national gas regulations shall be observed. · Keep any required ventilation openings clear of obstruction. · Do not use low temperature solder alloy in case of brazing the refrigerant pipes. · When performing brazing work, be sure to ventilate the room sufficiently. Make sure that there are no hazardous or flammable materials nearby. · When performing the work in a closed room, small room, or similar location, make sure that there are no refrigerant leaks before performing the work. If refrigerant leaks and accumulates, it may ignite or poisonous gases may be released. · Exercise caution when using any auxiliary heat source and follow all third party manufacturer instructions and safety guidelines for installation and usage. Any auxiliary heat source connected to this unit via the CN24 connection must have an independent temperature control mechanism. Failure to install and maintain such temperature control mechanism may void the warranty for this unit. Mitsubishi Electric shall not bear any warranty obligation or other liability any damage or loss in connection with such third party auxiliary heaters.

1

1. Safety precautions

1.1. Before installation (Environment)
Caution: · Do not use the unit in an unusual environment. If the air conditioner is
installed in areas exposed to steam, volatile oil (including machine oil), or sulfuric gas, areas exposed to high salt content such as the seaside, the performance can be significantly reduced and the internal parts can be damaged. · Do not install the unit where combustible gases may leak, be produced, flow, or accumulate. If combustible gas accumulates around the unit, fire or explosion may result. · Do not keep food, plants, caged pets, artwork, or precision instruments in the direct airflow of the indoor unit or too close to the unit, as these items can be damaged by temperature changes or dripping water.

· When the room humidity exceeds 80% or when the drain pipe is clogged, water may drip from the indoor unit. Do not install the indoor unit where such dripping can cause damage.
· When installing the unit in a hospital or communications office, be prepared for noise and electronic interference. Inverters, home appliances, highfrequency medical equipment, and radio communications equipment can cause the air conditioner to malfunction or breakdown. The air conditioner may also affect medical equipment, disturbing medical care, and communications equipment, harming the screen display quality.

1.2. Before installation or relocation
Caution: · Be extremely careful when transporting the units. Two or more persons are
needed to handle the unit, as it weighs 20 kg, 44 lbs or more. Do not grasp the packaging bands. Wear protective gloves as you can injure your hands on the fins or other parts. · Be sure to safely dispose of the packaging materials. Packaging materials, such as nails and other metal or wooden parts may cause stabs or other injuries. · Thermal insulation of the refrigerant pipe is necessary to prevent condensation. If the refrigerant pipe is not properly insulated, condensation will be formed. · Place thermal insulation on the pipes to prevent condensation. If the drain pipe is installed incorrectly, water leakage and damage to the ceiling, floor, furniture, or other possessions may result.

· Do not clean the air conditioner unit with water. Electric shock may result. · Tighten all flare nuts to specification using a torque wrench. If tightened
too much, the flare nut can break after an extended period. · If the unit is run for long hours when the air above the ceiling is at high tem-
perature/high humidity (dew point above 26 ºC, 79 ºF), dew condensation may be produced in the indoor unit or the ceiling materials. When operating the units in this condition, add insulation material (10-20 mm, 25/64-25/32 inch) to the entire surface of the unit and ceiling materials to avoid dew condensation.

1.3. Before electric work
Caution: · Be sure to install circuit breakers. If not installed, electric shock may result. · For the power lines, use standard cables of sufficient capacity. Otherwise,
a short circuit, overheating, or fire may result. · When installing the power lines, do not apply tension to the cables.

· Be sure to ground the unit. If the unit is not properly grounded, electric shock may result.
· Use circuit breakers (ground fault interrupter, isolating switch (+B fuse), and molded case circuit breaker) with the specified capacity. If the circuit breaker capacity is larger than the specified capacity, breakdown or fire may result.

1.4. Before starting the test run
Caution: · Turn on the main power switch more than 12 hours before starting opera-
tion. Starting operation just after turning on the power switch can severely damage the internal parts. · Before starting operation, check that all panels, guards and other protective parts are correctly installed. Rotating, hot, or high voltage parts can cause injuries.

Selecting the installation location

· Do not operate the air conditioner without the air filter set in place. If the air filter is not installed, dust may accumulate and breakdown may result.
· Do not touch any switch with wet hands. Electric shock may result. · Do not touch the refrigerant pipes with bare hands during operation. · After stopping operation, be sure to wait at least five minutes before turn-
ing off the main power switch. Otherwise, water leakage or breakdown may result.

2.1. Indoor unit
· Where airflow is not blocked. · Where cool air spreads over the entire room. · Where it is not exposed to direct sunshine. · At a distance 1 m (3 ft) or more away from your TV and radio (to prevent picture
from being distorted or noise from being generated).

· In a place as far away as possible from fluorescent and incandescent lights (so the infrared remote control can operate the air conditioner normally).
· Where the air filter can be removed and replaced easily.
Warning: Mount the indoor unit into a ceiling strong enough to withstand the weight of the unit.

2.2. Wireless remote controller mounting (For PAR-SF9FA-E*)
· Place of mounting · Where it is easy to operate and easily visible. · Where children can not touch.
· Mounting Select a position about 1.2 m (4 ft) above the floor, check that signals from the remote controller are surely received by the indoor unit from that position (beep’ orbeep-beep’ receiving tone sounds). After that, attach remote controller holder to a pillar or wall and set the wireless remote controller.

In rooms where inverter type fluorescent lamps are used, the signal from the wireless remote controller may not be received.

2

Installation diagram

9-21/32 13/32

24-19/32

24-19/32

Fig. 3-1

(inch)

3.1. Indoor unit (Fig. 3-1)
A Ceiling B Grille C Obstacle D Min. 1000 mm (40 inch) E Min. 500 mm (20 inch) (Entire periphery)
If setting the maintenance space for E, be sure to leave is a minimum of 700 mm (28 inch).
Warning: Mount the indoor unit on a ceiling strong enough to withstand the weight of the unit.

3.2. Outdoor unit
Refer to the outdoor unit installation manual.

Installing the indoor unit

1

2

3

4

5

6

Fig. 4-1

4.1. Check the indoor unit accessories (Fig. 4-1)
The indoor unit should be supplied with the following accessories.

Accessory name

Q’ty

1 Installation template

1

2 Washers (with insulation)

4

Washers (without insulation)

4

Pipe cover (for refrigerant piping joint)

3 small diameter (liquid)

1

large diameter (gas)

1

Band (large)

6

4 Band (middle)

2

Band (small)

2

5 Drain socket

1

6 Insulation

1

(22-11/16) C

(inch) 4.2. Ceiling openings and suspension bolt installation locations (Fig. 4-2)

J 24-19/32 D
9/32 to 31/32 22-11/16 to 24-1/32 C 9/32 to 31/32 16-1/16
I

9/32 to 31/32

(22-11/16) C

Caution: Install the indoor unit at least 2.4 m (8 ft) above floor or grade level. For appliances not accessible to the general public.
· Using the installation template and the gauge (supplied as an accessory with the grille), make an opening in the ceiling so that the main unit can be installed as shown in the diagram. (The method for using the template and the gauge are shown.) Before using, check the dimensions of template and gauge, because they change due to fluctuations of temperature and humidity. The dimensions of ceiling opening can be regulated within the range shown in following diagram; so center the main unit against the opening of ceiling, ensuring that the respective opposite sides on all sides of the clearance between them becomes identical.
· Use M10 (3/8″) suspension bolts. * Suspension bolts are to be procured at the field.
· Install securely, ensuring that there is no clearance between the ceiling panel & grille, and between the main unit & grille.

16-1/16 22-11/16 to 24-1/32 C
24-19/32 D

Min. 18 H 22-7/16 A 20-21/32 B 18-15/16
13-5/16

3-15/32

Min. 18 H

5-29/32

20-21/32 B 22-7/16 A

*1

K

Min. 3/16 9/32 to 31/32

A Outer side of main unit B Bolt pitch C Ceiling opening D Outer side of Grille E Grille F Ceiling

G Min. 500 mm (20 inch) (Entire periphery) If setting the maintenance space for G, be sure to leave is a minimum of 700 mm (28 inch).
H Maintenance space I Fresh air intake J Angle K Electric component box

• Leave the maintenance space at the electric component box end.

*1 When installing in an existing ceiling unit location or applying additional heat insulation, ensure a minimum space of 25 mm (1 inch).

8-3/16 9-21/32

7-7/16

5

13/32

+3/16 0

1-15/32

Min. 94-1/2

2-1/16 1-31/32 to 3-5/8

F
3

E G
Floor
Fig. 4-2

4. Installing the indoor unit

120° 60°
19/32

A

B

ø 2-15/16 ø 3-15/16

25/32

C G

5-1/2
F
120°

ø 3-15/16120°

(inch)

7-5/16 8-3/16

+3/16 0

1-15/32

2-3/4

E J Duct flange connection

H

D

I

Fig. 4-3

1

A Unit

B Grille

C Pillow

*B

2

D Ceiling E Rafter F Beam G Roof beam

*B

H Use inserts rated at 100-150 kg (220-331 lbs) each (procure locally)
I Suspension bolts M10 (3/8″) (procure locally)
J Steel reinforcing rod
*B: Suspension bolt pitch (see Fig. 4-2 B for details)

Fig. 4-4

A

(inch)

C

D A
E

5 Min. 1-3/16

+3/16 0

1-15/32

F

B

GC

A Suspension bolt (Procure locally) B Ceiling C Nut (Procure locally) D Washer (with insulation) (Accessory)

B
E Mounting plate F Washer (without insulation) (Accessory) G Check using the Installation gauge

Fig. 4-5

22-11/16 to 24-1/32 D
Fig. 4-6
A

A Main unit B Ceiling C Gauge (Grille accessory) D Ceiling opening dimensions

A Main unit

B Ceiling

C Installation template (Accessory)

B

C

Fig. 4-7

4.3. Installation of duct (in case of fresh air intake) (Fig. 4-3)

Caution: Linkage of duct fan and air conditioner ln case that a duct fan is used, be sure to make it linked with the air conditioner when outside air is taken. Do not run the duct fan only. It can cause dew drop.

Making a duct flange (prepared locally) · The shape of duct flange shown left is recommended. Installation of duct flange · Cut out the cutout hole. Do not knock it out. · Install a duct flange to the cutout hole of the indoor unit with three 4 10 mm tapping
screws which should be prepared locally. Installation of duct (should be prepared locally) · Prepare a duct of which inner diameter fits into the outer diameter of the duct flange. · In case that the environment above the ceiling is high temperature and high humidity,
wrap the duct in a heat insulate to avoid causing dew drop on the wall. Remove the drain pan insulation.

A Duct flange recommended shape

F 3-Tapping screw hole

(Thickness:0.8 mm (1/32 inch) or more)

G ø73.4 mm (2-7/8 inch) cutout hole

B 3-ø5 mm (3/16 inch) hole

H Duct flange (Prepared locally)

C Detail drawing of fresh air intake D Indoor unit E Ceiling surface

I 4 10 mm Tapping screw (Prepared locally)
J Insulation

4.4. Suspension structure (Give site of suspension
strong structure) (Fig. 4-4)
· The ceiling work differs according to the construction of the building. Building constructors and interior decorators should be consulted for details.
(1) Extent of ceiling removal: The ceiling must be kept completely horizontal and the ceiling foundation (framework: wooden slats and slat holders) must be reinforced in order to protect the ceiling from vibration.
(2) Cut and remove the ceiling foundation. (3) Reinforce the ends of the ceiling foundation where it has been cut and add ceiling
foundation for securing the ends of the ceiling board. (4) When installing the unit on a slanting ceiling, interlock a pillow between the ceiling
and the grille and set so that the unit is installed horizontally. 1 Wooden structures · Use tie beams (single-story houses) or second floor beams (two story houses) as
reinforcing members. · Wooden beams for suspending air conditioners must be sturdy and their sides must
be at least 6 cm (2-3/8 inch) long if the beams are separated by not more than 90 cm (36 inch) and their sides must be at least 9 cm (3-9/16 inch) long if the beams are separated by as much as 180 cm (71 inch). The size of the suspension bolts should be ø10 (3/8″). (The bolts do not come with the unit.)

2 Ferroconcrete structures Secure the suspension bolts using the method shown, or use steel or wooden hangers, etc. to install the suspension bolts.

4.5. Unit suspension procedures (Fig. 4-5)
Suspend the main unit as shown in the diagram. 1. In advance, set the parts onto the suspension bolts in the order of the washers
(with insulation), washers (without insulation) and nuts (double). · Fit the washer with cushion so that the insulation faces downward. · In case of using upper washers to suspend the main unit, the lower washers (with
insulation) and nuts (double) are to be set later. 2. Lift the unit to the proper height of the suspension bolts to insert the mounting
plate between washers and then fasten it securely. 3. When the main unit can not be aligned against the mounting hole on the ceiling,
it is adjustable owing to a slot provided on the mounting plate. (Fig. 4-6) · Make sure that step A is performed within 37-42 mm (1-15/32 to 1-21/32 inch).
Damage could result by failing to adhere to this range.
4.6. Confirming the position of main unit and tightening the suspension bolts (Fig. 4-7)
· Using the gauge attached to the grille, ensure that the bottom of the main unit is properly aligned with the opening of the ceiling. Be sure to confirm this, otherwise condensation may form and drip due to air leakage etc.
· Confirm that the main unit is horizontally levelled, using a level or a vinyl tube filled with water.
· After checking the position of the main unit, tighten the nuts of the suspension bolts securely to fasten the main unit.
· The installation template can be used as a protective sheet to prevent dust from entering the main unit when the grilles are left unattached for a while or when the ceiling materials are to be lined after installation of the unit is finished.

• As for the details of fitting, refer to the instructions given on the Installation template.

4

+3/16 0

A=1-15/32

Refrigerant piping work

ø6.35 (1/4″)

NTXCKS09/12A112BA: ø9.52 (3/8″) NTXCKS15/18A112BA: ø12.7 (1/2″)

Fig. 5-1

A Indoor unit B Outdoor unit

0

1

/

a Copper tubes

90

2

3

4 b Good

c No good

d Tilted

e Uneven

f Burred

Fig. 5-2

/

0

1

2

Fig. 5-3

a Burr b Copper tube/pipe c Spare reamer d Pipe cutter

/
0
Fig. 5-4

a Flare nut b Copper tube

/

A

3

a Flaring tool

b Die

0

c Copper tube

0

2

d Flare nut

1

1

e Yoke

Fig. 5-5

/B 0 23456

1
5

7
Fig. 5-6

5.1. Precautions
For devices that use R410A refrigerant · Use alkylbenzene oil (small amount) as the refrigeration oil applied to the
flared sections. · Use C1220 copper phosphorus for copper and copper alloy seamless pipes,
to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specified in the table below. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust.
Warning: When installing or relocating, or servicing the air conditioner, use only the specified refrigerant written on outdoor unit to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards. The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

5.2. Refrigerant pipe (Fig. 5-1)
Piping preparation (1) Table below shows the specifications of pipes commercially available.

Model

Pipe

Outside diameter Min. wall Insulation mm inch thickness thickness

Insulation material

For liquid 6.35 NTXCKS09/ 12A112BA
For gas 9.52
For liquid 6.35 NTXCKS15/ 18A112BA
For gas 12.7

1/4

0.8 mm

8 mm

(1/32 inch) (10/32 inch)

Heat resist-

3/8

0.8 mm

8 mm

(1/32 inch) (10/32 inch)

ing foam

plastic 0.045

1/4

0.8 mm

8 mm

(1/32 inch) (10/32 inch)

specific

gravity

1/2

0.8 mm

8 mm

(1/32 inch) (10/32 inch)

(2) Ensure that the 2 refrigerant pipes are well insulated to prevent condensation. (3) Refrigerant pipe bending radius must be 100 mm (4 inch) or more.

Caution: Using careful insulation of specified thickness. Excessive thickness prevents storage behind the indoor unit and smaller thickness causes dew drippage.

5.3. Flaring work
· Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.

5.3.1. Pipe cutting (Fig. 5-2) · Using a pipe cutter cut the copper tube correctly.

5.3.2. Burrs removal (Fig. 5-3) · Completely remove all burrs from the cut cross section of pipe/tube. · Put the end of the copper tube/pipe to downward direction as you remove burrs in
order to avoid burrs drop in the tubing.

5.3.3. Putting nut on (Fig. 5-4) · Remove flare nuts attached to indoor and outdoor unit, then put them on pipe/tube
having completed burr removal. (not possible to put them on after flaring work)

5.3.4. Flaring work (Fig. 5-5) · Carry out flaring work using flaring tool as shown at the right.

Pipe diameter (mm, inch)

Dimension

A (mm, inch)

When the tool for R410A is used Clutch type

B +- 00.4, 1/64 (mm, inch)

6.35, 1/4″ 9.52, 3/8″ 12.7, 1/2″

0 to 0.5, 0 to 1/64 0 to 0.5, 0 to 1/64 0 to 0.5, 0 to 1/64

9.1, 11/32 13.2, 17/32 16.6, 21/32

Firmly hold copper tube in a die in the dimension shown in the table at above.

5.3.5. Check (Fig. 5-6)

· Compare the flared work with a figure in right side hand. · If flare is noted to be defective, cut off the flared section and do flaring work again.

a Smooth all around

f Scratch on flared plane

b Inside is shining without any scratches

g Cracked

c Even length all around

h Uneven

d Too much

i Bad examples

e Tilted

5. Refrigerant piping work

(inch) 5.4. Refrigerant and drainage piping locations (Fig. 5-7)

A Drain pipe

E 1/4 7-23/32 7-23/32

B Ceiling

A

C Grille

F

D Refrigerant pipe (liquid)

E Refrigerant pipe (gas)

F Main unit

7-13/32

5-1/4 2-23/32

D

C

B

Model
NTXCKS09/12A112BA NTXCKS15/18A112BA

Dimension (mm, inch)

A (liquid)

B (gas)

63, 2-15/32

72, 2-27/32

63, 2-15/32

78, 3-1/16

3-1/16 (gas) 2-15/32 (liquid)

2-17/32

,

Fig. 5-7

A

B

F F

CD E

A Refrigerant pipe and insulating material (Procure locally)
B Pipe cover (large) (Accessory) C Pipe cover (small) (Accessory) D Refrigerant pipe (gas) E Refrigerant pipe (liquid) F Band (Accessory) G Cross- sectional view of connection H Refrigerant pipe I Insulating material J Squeeze

Fig. 5-8

45°± 2°

R(R01.4/6t4o tRo0R.81/32)

Union joint

Flare nut

5.5. Pipe connection (Fig. 5-8)
Indoor unit 1) When using commercially available copper pipes: · Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening
flare nut. · Use two wrenches to tighten piping connections. · Air-purge the refrigerant piping using your own refrigerant gas (don’t air-purge the
refrigerant charged in the outdoor unit). · Use leak detector or soapy water to check for gas leaks after connections are
completed. · Use flared nut installed to this indoor unit. · In case of reconnecting the refrigerant pipes after detaching, make the flared part
of pipe re-fabricated. · Use refrigerant piping insulation provided to insulate indoor unit connections. Insulate
carefully following shown below.
2) Heat insulation for refrigerant pipes: 1 Wrap the enclosed large-sized pipe cover around the gas pipe, making sure that
the end of the pipe cover touches the side of the unit. 2 Wrap the enclosed small-sized pipe cover around the liquid pipe, making sure that
the end of the pipe cover touches the side of the unit. 3 Secure both ends of each pipe cover with the enclosed bands. (Attach the bands
20 mm (25/32 inch) from the ends of the pipe cover.) Make sure that the slit in the pipe cover is facing upward when it is installed.

See that stop valve on outdoor unit is fully shut (unit is shipped with valve shut). After all piping connections between indoor and outdoor unit have been completed, vacuumpurge air from system through the service port for the stop valve on the outdoor unit. After completing procedures above, open outdoor unit stop valves stem fully. This completes connection of refrigerant circuit between indoor and outdoor units. Stop valve instructions are marked on outdoor unit.

Flare nut tightening · Apply a thin coat of refrigeration oil on the seat surface of pipe. (Fig. 5-9) · For connection first align the center, then tighten the first 3 to 4 turns of flare nut. · Use tightening torque table below as a guideline for indoor unit side union joint
section, and tighten using two wrenches. Excessive tightening damages the flare section. · Flare the ends of the refrigerant pipes. A · Apply refrigerating machine oil over the entire flare seat surface. B · Use the flare nuts as follows. C · Use 2 wrenches to tighten piping connections. D

Copper pipe O.D. (mm, inch)

Flare nut O.D. (mm, inch)

Tightening torque (N·m, ft·lbs)

ø6.35, 1/4 ø9.52, 3/8 ø12.7, 1/2

17, 21/32 22, 7/8
26, 1-1/32

14 to 18, 10 to 13 34 to 42, 25 to 31 49 to 61, 36 to 45

90°± 0.5°
øA

Male side
Lock the union joint with a wrench.

Female side
Tighten the flare nut with a torque wrench.
Fig. 5-9

6

Drainage piping work

1

Max. 65 ft

5 to 7 ft
C

A

B

2 K
L

B

M

3

Max. 6 in

Fig. 6-1

B H
DE E K 1-3/16 1-3/161-3/16

A

A

F CL

G
Fig. 6-2

(inch) C,K
J
I

6.1. Drainage piping work (Fig. 6-1)
· Use VP25 (O. D. ø32 mm (1-1/4 inch) PVC TUBE) for drain piping and provide 1/100 or more downward slope.
· Be sure to connect the piping joints using a polyvinyl type adhesive. · Observe the figure for piping work.
1 Correct piping 2 Wrong piping
Do not place an air bleeder It may cause overflowing of drainage, K Do not place a raised pipe on the piping, L Do not place odor traps on the piping, M 3 Grouped piping · Use the included drain hose to change the extraction direction.
A Insulation (9 mm (11/32 inch) or more) B Downward slope (1/100 or more) C Support metal D O. D. ø32 mm (1-1/4 inch) PVC TUBE E Make it as large as possible F Indoor unit G Make the piping size large for grouped piping. H Downward slope (1/100 or more) I O. D. ø38 mm (1-1/2 inch) PVC TUBE for grouped piping
(9 mm (11/32 inch) or more insulation) J Up to 850 mm (33 inch)

1. Connect the drain socket (supplied with the unit) to the drain port. (Fig. 6-2)

(Affix the tube using PVC adhesive then secure it with a band.)

2. Install a locally purchased drain pipe (PVC pipe, O.D. ø32 mm (1-1/4 inch)).

(Affix the pipe using PVC adhesive then secure it with a band.)

3. Insulate the tube and pipe. (PVC pipe, O.D. ø32 mm (1-1/4 inch) and socket)

4. Check that drain flows smoothly.

5. Insulate the drain port with insulating material, then secure the material with a

band. (Both insulating material and band are supplied with the unit.)

A Main unit

H Insulating material (purchased locally)

B Insulating material

I Transparent PVC pipe

C Band (large)

J O.D. ø32 mm (1-1/4 inch) PVC TUBE (Slope

D Drain port (transparent)

1/100 or more)

E Insertion margin

K Band (middle)

F Matching

L Drain socket

G Drain pipe (O.D. ø32 mm (1-1/4 inch)

PVC TUBE)

7

Electrical work

H CD

A

GF

B

A Electric component cover B Electric component box C Entry for Indoor-Outdoor connecting cable D Entry for wired remote controller cable E Cable clamp

F Indoor/Outdoor unit connecting terminal G Wired remote controller terminal H Indoor controller I Earth cable

Fig. 7-1

B

7.1. Indoor unit (Fig. 7-1) (Fig. 7-2) (Fig. 7-3)
Work procedure 1.Loosen the two screws securing the electric component cover, and then slide and
remove the cover. 2.Route the wires along the wiring routes and through the wire inlets in the electric
component box. (Procure the power supply cord and indoor/outdoor unit connecting cable locally.) 3.Securely connect the power supply cord and the indoor/outdoor unit connecting cable to the terminal block. 4.Secure the wires with the cable straps inside the electric component box. Secure the wires with cable straps as cushioning components so that no stress is applied to the connecting sections of the terminal block when tension is generated. 5.Install the electric component cover. Make sure that the wires do not get pinched. · Do not allow slackening of the terminal screws. · Tape is affixed over the conduit hole used for connecting the electric wiring. Please remove this tape if making a connection through the hole.
Warning: · Insert hook the electric component cover into the bent support on the electric
component box and attach the cover securely. If it is attached incorrectly, it could result in a fire, electric shock due to dust, water, etc. · Use the specified indoor/outdoor unit connecting cable to connect the indoor and outdoor units and fix the cable to the terminal block securely so that no stress is applied to the connecting section of the terminal block. Incomplete connection or fixing of the cable could result in a fire.

E C

G E IF D
Fig. 7-2

Secure with a band 4 (small) at the location shown in the diagram

Caution: · Before installing the grille, make sure that the junction wire is connected. · If the grille has signal receiver or i-See sensor, the pack of grille includes
junction wire.

Signal receiver:

CN90

3D i-See sensor:

CN5Y

3D i-See sensor motor: CN4Z

CN90 CN4Z

12
S1 S2 S3
15

Be sure to connect the remote controller cable (0.3 mm, AWG22) to the locations shown in the diagram.

Fig. 7-3

Secure with a band 4 (small) at the location shown in the diagram
(Remote controller cable retainer)
Cable strap

CN5Y

7.1.1. Indoor unit power supplied from outdoor unit The following connection patterns are available. The outdoor unit power supply patterns vary on models.

1:1 System

D

G

L1

A

BC
L2

GR

S1

S1

S2

S2

S3

S3

E
1
F
2

A Outdoor unit power supply B Earth leakage breaker C Wiring circuit breaker or isolating switch D Outdoor unit E Indoor unit/outdoor unit connecting cables F Remote controller G Indoor unit

· Affix label A that is included with the manuals near each wiring diagram for the indoor and outdoor units. Applied earth type depends on outdoor unit. Please refer to connected outdoor unit Installation Manual.

8

7. Electrical work

Circuit rating

Wiring Wire No. × size (mm2)

Indoor unit model Indoor unit-Outdoor unit Indoor unit-Outdoor unit earth Indoor unit earth Remote controller-Indoor unit Indoor unit (Heater) L-N Indoor unit-Outdoor unit S1-S2 Indoor unit-Outdoor unit S2-S3 Remote controller-Indoor unit

NTXCKS.A112BA

*1

3 × AWG16 (polar)

*1

1 × Min. AWG16

1 × Min. AWG16

*2

2 × AWG22 (Non-polar)

*3

—

*3

208/230 VAC

*3

24 VDC / 28 VDC

*3

12 VDC

1. <For 09-18 outdoor unit application> Max. 45 m, 148 ft If AWG13 (2.5 mm2) used, Max. 50 m, 165 ft If AWG13 (2.5 mm2) used and S3 separated, Max. 80 m, 263 ft
2. Max. 500 m, 1640 ft. (When using 2 remote controllers, the maximum wiring length for the remote controller cables is 200 m, 656 ft.)
*3. The figures are NOT always against the ground.
S3 terminal has 24 VDC against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code. 2. Power supply cords and indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57) 3. Install an earth longer than other cables. 4. Indoor and outdoor connecting wires have polarities. Make sure to match the terminal number (S1, S2, S3) for correct wirings. 5. Wiring for remote controller cable shall be apart (5 cm, 2 inch or more) from power source wiring so that it is not influenced by electric noise from power source wiring. 6. This appliance incorporates an earth connection for functional purpose only.

Warning: Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.

7.1.2. In case of connecting to Branch Box (For example PAC-MKA**BC), use below information for calculating “F2” and “G1”. For detail, please refer to Branch Box installation manual.

Indoor unit

V1

V2

NTXCKS.A112BA

17.1

2.4

7.1.3. Installing the i-See sensor and signal receiver

Before installing the grille, connect the junction wires included with the grille acces-

sories and place them in the connector box.

1 Remove the two screws securing the wire cover of the main unit, and then open

the cover.

D

2 Route the wires of the i-See sensor and signal receiver through the wire inlets in

the electric component box as shown in the diagram and around the bushings on

A

the side of the main unit. (Fig. 7-4)

When routing the wires, open the clamp securing the grille junction wire, and then

secure the grille junction wire and the wires of the i-See sensor and signal receiver

Fig. 7-4

with the clamp. 3 Remove the one screw securing the connector box cover, and then open the cover.

(Fig. 7-5)

C

4 Place the junction wire connector in the connector box.

5 Install the wire cover and connector box cover.

Caution:

When installing the covers, make sure that the wires do not get pinched.

B

Fit the band securing the junction wires between the ribs on the connector box

as shown in the diagram. (Fig. 7-6)

Fig. 7-5

A Wire cover B Connector box cover C Connector box D i-See sensor or signal receiver lead wire (Grille accessory) E Band

Between ribs

D

E

Fig. 7-6

9

7. Electrical work

1

B

C

A 2

D

Fig. 7-7

B A
Fig. 7-8

7
A
Fig. 7-9

1
4 2 3 6 5 8
C
B
Fig. 7-10

7.2. Remote controller
When using a wired remote controller together with a wireless remote controller, use the following wireless remote controller.

7.2.1. Wired remote controller

1. Installing procedures

Refer to the installation manual that comes with each remote controller for details.

2. Function selection of remote controller

If two remote controllers are connected, set one to “Main” and the other to “Sub”.

For setting procedures, refer to “Function selection of remote controller” in the

operation manual for the indoor unit.

7.2.2. For wireless remote controller

1. Installation area

· Area in which the remote controller is not exposed to direct sunshine.

· Area in which there is no nearby heating source.

· Area in which the remote controller is not exposed to cold (or hot) winds.

· Area in which the remote controller can be operated easily.

· Area in which the remote controller is beyond the reach of children.

2. Installation method (Fig. 7-7)

1 Attach the remote controller holder to the desired location using 2 tapping screws.

2 Place the lower end of the controller into the holder.

A Remote controller B Wall C Display panel D Receiver

· The signal can travel up to approximately 7 meters, 23 feet (in a straight line)

within 45 degrees to both right and left of the center line of the receiver.

3. Setting (Clock setting) (Fig. 7-8)

1. Insert batteries or press the

button with something sharp.

[CLOCK] A and [:] B blinks.

2. Press the

button with something sharp.

3. Press the button to set the time.

Press the

button to set the Day.

4. Press the

button with something sharp at the end.

[CLOCK] and [:] lighted.

4. Initial setting

The following settings can be made in the initial setting mode.

Item Temperature unit Time display AUTO mode Pair No. Backlight

Setting ºC/ºF 12-hour format/24-hour format Single set point/Dual set point 0­3 On/Off

Fig. 7-10 A B C D E

4-1. Switching to the initial setting mode

1. Press the

button 1 to stop the air conditioner.

2. Press the

button 2.

The Function setting screen will be displayed and the function No. A will

blink. (Fig. 7-9)

Press the button 4 to change the function No.

3. Check that function No. “1” is displayed, and then press the The display setting screen will be displayed. (Fig. 7-10)

button 3.

4-2. Changing the temperature unit A

Press the

button 5.

Each time the

button 5 is pressed, the setting switches between and .

: The temperature is displayed in degrees Celsius.

: The temperature is displayed in degrees Fahrenheit.

4-3. Changing the time display B

Press the

button 6.

Each time the

button 6 is pressed, the setting switches between

and

.

: The time is displayed in the 12-hour format.

: The time is displayed in the 24-hour format.

4-4. Changing the AUTO mode C

Press the

button 7.

Each time the

button 7 is pressed, the setting switches between

and . : The AUTO mode operates as the usual automatic mode. : The AUTO mode operates using dual set points.

4-5. Changing the pair No. D

Press the button 4. A
Each time the button 4 is pressed, the pair No. 0­3 changes.

D

Pair No. of wireless remote controller

Indoor PC board

0

Initial setting

1

Cut J41

2

Cut J42

E

3

Cut J41, J42

4-6. Changing the backlight setting E

Press the

button 8.

Each time the

button 8 is pressed, the setting switches between and

.

: The backlight comes on when a button is pressed.

: The backlight does not come on when a button is pressed.

10

7. Electrical work

Service menu
Test run Input maintenance info. Settings Check Others
Main menu: RETURN Cursor

F1 F2 F3 F4

MENU RETURN SELECT HOLD

ON OFF

Fig. 7-11

Function setting

Ref. address

Unit No.

Grp./1/2/3/4/All

Monitor: SELECT

Cursor

Address

F1 F2 F3 F4

MENU RETURN SELECT HOLD

ON OFF

Fig. 7-13

Function setting

Ref. address Grp.

Mode 1

Mode 2

Mode 3

Mode 4

Request: SELECT

Cursor

Cursor

F1 F2 F3 F4

MENU RETURN SELECT HOLD

ON OFF

Fig. 7-15

Fig. 7-17
B
Fig. 7-19

Settings menu Function setting

Service menu: MENU

F1 F2 F3 F4

MENU RETURN SELECT HOLD

ON OFF

Fig. 7-12

Function setting
Ref. address Grp. Mode 1 Mode 2 Mode 3 Mode 4

Cursor

Cursor

F1 F2 F3 F4

MENU RETURN SELECT HOLD

ON OFF

Fig. 7-14

Function setting Ref. address Grp.

Sending data

7.3. Function settings
7.3.1. By wired remote controller 1 (Fig. 7-11)
· Select “Service” from the Main menu, and press the [SELECT/HOLD] button. · Select “Settings” from the Service menu, and press the [SELECT/HOLD] button.
2 (Fig. 7-12) · Select “Function settings” with the [SELECT/HOLD] button.
3 (Fig. 7-13) · Set the indoor unit refrigerant addresses and unit numbers with the [F1] through [F4] buttons, and then press the [SELECT/HOLD] button to confirm the current setting.