MITSUBISHI ELECTRIC NTXWST06B112A Split Type Air Conditioners Instruction Manual

: June 17, 2024
: Mitsubishi Electric

Table of Contents

Before Installation
Warning (Could lead to death or serious injury.)
Caution (Could lead to serious injury when operated incorrectly.)
Selecting the Installation Location
Specifications
Installation Diagram
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MITSUBISHI ELECTRIC NTXWST06B112A Split Type Air Conditioners Instruction Manual

Before Installation

The Following Should Always Be Observed for Safety

Be sure to read these safety precautions and instructions.
Be sure to observe the warnings and cautions specified here.
After reading this manual, be sure to store it with the OPERATING INSTRUCTIONS for future reference.
Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.

Warning (Could lead to death or serious injury.)

Do not install the unit by yourself (user).
Improper or incomplete installation could cause fire, electric shock, injury due to the unit falling, or water leakage. Consult a qualified installer or the dealer from whom you purchased the unit.
Follow the instructions detailed in the installation manual.
Incomplete installation could cause fire or electric shock, injury due to the unit falling, or leakage of water.
When installing the unit, use appropriate protective equipment and tools for safety.
Failure to do so could cause injury.
Install the unit securely in a place that can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall causing injury.
Do not alter the unit.
It may cause fire, electric shock, injury or water leakage.
Perform electrical work according to the installation manual and be sure to use an exclusive circuit. Do not connect other electrical appliances to the circuit.
If the capacity of the power circuit is insufficient or there is incomplete electrical work, it could result in a fire or an electric shock.
Ground the unit correctly.
Do not connect the ground wire to a gas pipe, water pipe, lightning rod or telephone ground. Defective grounding could cause electric shock.
Do not damage the wires.
Damaged wires could cause fire.
Be sure to shut off the main power when setting up the indoor P.C. board or wiring.
Failure to do so could cause electric shock.
Use the specified wires to securely connect the indoor and outdoor units.
Attach the wires firmly to avoid applying stress to the terminal block. Improper connection could cause fire.
Do not install the unit in a place where flammable gas may leak.
If gas leaks and accumulates around the unit, it could cause an explosion.
Do not use intermediate connection of the power cord or the extension cord.Do not connect many devices to one AC outlet.
It could cause a fire or an electric shock.
Use the parts provided or specified parts for the installation work.
The use of defective parts could cause an injury or leakage of water due to a fire, an electric shock, the unit falling, etc.
When plugging the power supply plug into the outlet, make sure that there is no dust, blockage, or loose parts both in the outlet and on the plug. Verify that the power supply plug is completely in the outlet.
If there is dust, blockage, or loose parts on the power supply plug or the outlet, it could cause electric shock or fire. If loose parts are found on the power supply plug, replace it.
Securely attach the electrical cover to the indoor unit and the service panel to the outdoor unit
. If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are not attached securely, dust, water, etc. could collect in the unit and could cause a fire or an electric shock.
When installing, relocating, or servicing the unit, make sure that no substance other than the specified refrigerant (R410A) enters the refrigerant circuit.
Any presence of foreign substance such as air can cause abnormal pressure rise and may result in explosion or injury. The use of any refrigerant other than that specified for the system will cause mechanical failure, system malfunction, or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.
Do not discharge the refrigerant into the atmosphere. Check that the refrigerant gas does not leak after installation has been completed. If refrigerant leaks during installation, ventilate the room.
If refrigerant comes in contact with a fire, harmful gas could be generated. If refrigerant gas leaks indoors, and comes into contact with the flame of a fan heater, space heater, stove, etc., harmful gases will be generated.
Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times higher than R22. Not using the appropriate tools and materials, or improper installation could cause the pipes to burst causing an injury.
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is running and the stop valve is open, air could be drawn in and the pressure in the refrigeration cycle could become abnormally high, causing the pipes to burst.
When installing the unit, securely connect the refrigerant pipes before starting the compressor.
If the compressor is started before the refrigerant pipes are connected and the stop valve is open, air could be drawn in and the pressure in the refrigeration cycle could become abnormally high, causing the pipes to burst.
Fasten a flare nut with a torque wrench as specified in this manual.
If fastened too tight, a flare nut could break and cause refrigerant leakage.
Install the unit according to national wiring regulations.
When opening or closing the valve below freezing temperatures, refrigerant may spurt out from the gap between the valve stem and the valve body, resulting in injuries.
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 ban 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 for any damage or loss in connection with such third party auxiliary heaters.

Caution (Could lead to serious injury when operated incorrectly.)

Depending on the installation area, install a Ground Fault Interrupt (GFI) circuit breaker.
If the Ground Fault Interrupt (GFI) circuit breaker is not installed, an electric shock could occur.
Perform the drainage/piping work securely according to the installation manual.
If there is defect in the drainage/piping work, water could drip from the unit, and damage household items.
Do not touch the air inlet or the aluminum fins of the outdoor unit. This could cause injury.
Please wear protective equipment when you touch the base of the outdoor unit.
It could cause injury if you do not wear the protective equipment.
Do not install the outdoor unit where small animals may live.
If small animals enter the unit and damage its electrical parts, it could cause a malfunction, smoke emission, or fire. Keep the area around the unit clean.

Selecting the Installation Location

Indoor Unit

Where airflow is not blocked.
Where cool (or warm) air spreads over the entire room.
On a rigid wall to reduce the possibility of vibration.
Where it is not exposed to direct sunlight. Do not expose to direct sunlight also during the period following unpacking to before use.
Where it can be easily drained.
At a distance 3 feet (1 m) or more away from a TV and radio. Operation of the air conditioner may interfere with radio or TV reception. An amplifier may be required for the affected device.
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.
Where it is away from the other heat or steam source.

Note: Install the indoor unit high on the wall where air can distribute over the entire room.

Remote Controller

Where it is convenient to operate and easily visible.
Where children cannot easily touch it.
Select a position about 4 feet (1.2 m) above the floor. Check that signals from the remote controller from that position are received by the indoor unit (‘beep’ or ‘beep beep’ receiving tone sounds). When the remote controller holder is supplied, install it at a position from which the indoor unit can receive signals.

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

Outdoor Unit

Where it is not overly exposed to strong winds. If the outdoor unit is exposed to a wind during defrosting, the defrosting time will be longer.
Where airflow is good and dustless.
Where neighbours are not annoyed by operation sound or hot (or cool) air.
Where rigid wall or support is available to prevent the increase of operation sound or vibration.
Where there is no risk of combustible gas leakage.
If installing the unit in a location high above the ground, be sure to secure the unit legs.
Where it is at least 10 feet (3 m) away from the antenna of TV set or radio. Operation of the air conditioner may interfere with radio or TV reception in areas where reception is weak. An amplifier may be required for the affected device.
Install the unit horizontally.
Please install it in an area not affected by snowfall or blowing snow.
In areas with heavy snow, please install a canopy, a pedestal and/or baffle boards.

Note:

It is advisable to make a piping loop near outdoor unit so as to reduce vibration.
For increased efficiency, install the outdoor unit in alocation where continuous direct sunlight or excessive water can be avoided as much as possible.

Note:

When operating the air conditioner in low outside temperature, be sure to follow the instructions described below.
Never install the outdoor unit in a place where its air inlet/outlet side may be exposed directly to wind.
To prevent exposure to wind, install the outdoor unit with its air inlet side facing the wall and a baffle board on the air outlet side. Avoid the following places for installation where air conditioner trouble is liable to occur.
Where flammable gas could leak.
Where there is an excessive amount of machine oil in the air.
Where oil is splashed or where the area is filled with oily smoke (such as cooking areas and factories, in which the properties of plastic could be changed and damaged).
Salty places such as the seaside.
Where sulfide gas is generated such as hot spring, sewage, waste water.
Where there is high-frequency or wireless equipment.
Where there is emission of high levels of VOCs, including phthalate compounds, formaldehyde, etc., which may cause chemical cracking.

Specifications

Power Supply and Indoor/Outdoor Wire Connection

Power should be taken from an exclusive branched circuit.
Wiring work should be based on applicable technical standards.
Wiring connections should be made following the diagram.
Securely tighten screws.
Connecting wires and the ground wire
Use solid conductor Min. AWG14 or stranded conductor Min. AWG14.
Use double insulated copper wire with 600 V insulation.
Use copper supply wire.
Follow local electrical codes.
Power supply cable and ground wire
Use solid or stranded conductor Min. AWG14.
Use copper supply wire.
Follow local electrical codes.

Note:
When the indoor unit is powered from the outdoor unit, depending on local code, a disconnect switch needs to be installed to a power supply circuit.

Electrical specifications

**** MODEL| INDOOR| NTXWST 06B112A ✱| NTXWST09B112A ✱ NTYWST09B112A ✱| NTXWST12B112A ✱ NTYWST12B112A ✱| NTXWST15B112A ✱ NTYWST15B112A ✱
---|---|---|---|---|---
OUTDOOR| **–| NTXSST 09B112A ✱ NTYSST 09B112A ✱| ****NTXSSH 09A112A ✱| NTXSST 12B112A ✱ NTYSST 12B112A ✱| ****NTXSSH 12A112A ✱| NTXSST 15B112A ✱ NTYSST 15B112A ✱| ****NTXSSH 15A112A* ✱
INDOOR UNIT
Power supply (V, PHASE, Hz)| 208/230, 1, 60
Min. Circuit Ampacity| (A)| 1.0
Fan motor (F.L.A.)| (A)| 0.75
OUTDOOR UNIT
Power supply (V, PHASE, Hz)| 208/230, 1, 60
Max. Fuse size (time delay) (A)| | 15| 15| 15| 15| 15| 15
Min. Circuit Ampacity| (A)| | 10| 10| 10| 10| 10| 10
Fan motor (F.L.A.)| (A)| | 0.50| 0.50| 0.50| 0.50| 0.50| 0.50
**** Compressor| (R.L.A) (A)| NTX| | 6.7| 6.7| 6.7| 7.4| 7.4| 7.4
NTY| | 6.7| –| 6.7| –| 7.4| –
(L.R.A) (A)| NTX| | 8.4| 8.4| 8.4| 9.2| 9.2| 9.2
NTY| | 8.4| –| 8.4| –| 9.2| –
Control voltage| Indoor unit – Remote controller: (Wireless) Indoor unit – Outdoor unit: DC12-24 V (Polar)

NTXWST06B112A✱ is a dedicated indoor unit for multi system. Refer to the installation manual of the multiunit for details.

Refrigerant Pipes

To prevent condensation, insulate the two refrigerant pipes.

Caution
Be sure to use the insulation of specified thickness (table on the right). Excessive insulation may cause incorrect installation of the indoor unit, and too little insulation may cause condensate to form.

Refrigerant pipe bending radius must be 4 inches (100 mm) or more.
The unit has flared connections on both indoor and outdoor sides.
Remove the valve cover from the outdoor unit, then connect the pipe.
Refrigerant pipes are used to connect the indoor and outdoor units.
Be careful not to crush or over bend the pipe in pipe bending.
Refrigerant adjustment… If pipe length exceeds 25 feet (7.5 m), additional refrigerant (R410A) charge is required. (The outdoor unit is charged with refrigerant for pipe length up to 25 feet [7.5 m])
Please carefully consider the indoor unit location when piping lengths are less than 16 feet (5 m) as there could be intermittent noises during normal operation that would be noticeable in very quiet environments.

Pipe

| Outside diameter| Minimum wall thickness| Insulation thickness| Insulation material
---|---|---|---|---
inch (mm)
For liquid| 1/4 (6.35)| 0.0315 (0.8)| 5/16 (8)| Heat resistant foam plastic 0.045 Spe- cific gravity
For gas| 3/8 (9.52)| 0.0315 (0.8)| 5/16 (8)
1/2 (12.7)| 0.0315 (0.8)| 5/16 (8)

Limits

Pipe length| NTXWST09/12/15B112A✱ NTYWST09/12/15B112A✱| 65 feet (20 m) max.
Height difference| 40 feet (12 m) max.
No. of bends| 10 max.

Installation Diagram

Accessories Check the following parts before installation.

(1)	Installation plate	1
(2)	Attachment screws for the installa- tion plate4 × 25 mm	5
(3)	Wireless remote controller	1
(4)	Felt tape (For left or left-rear piping)	1
(5)	Remote controller holder	1
(6)	Screws for the remote controller holder3.5 × 16 mm (Black)	2
(7)	Battery (AAA) for (3)	2
(8)	Air cleaning filter	2

Field-supplied parts

(A)	Indoor/outdoor unit connecting wire*1	1
(B)	Extension pipe	1
(C)	Wall hole sleeve	1
(D)	Wall hole cover	1
(E)	Pipe attachment strap	2 to 5
(F)	Screw for (E) 4 × 20 mm	2 to 5
(G)	Piping tape	1
(H)	Putty	1
(I)	Drain hose(or soft PVC hose, 15 mm inner diameter or hard PVC pipe VP30)