MLZKP09NA2U1 User Manual

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1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY

• Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY” before installing the air conditioner.

• Besuretoobservethewarningsandcautionsspeciedhereastheyincludeimportantitemsrelatedtosafety.

• After reading this manual, be sure to keep it together 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.

Required Tools for Installation

■ Do not install the unit by yourself (user).

 Incomplete installation could cause re or electric

shock, injury due to the unit falling, or leakage of

water. Consult the dealer from whom you purchased

theunitoraqualiedinstaller.

■ Perform the installation securely referring to

the installation manual.

 Incomplete installation could cause re or electric

shock, injury due to the unit falling, or leakage of

water.

■ When installing the unit, use appropriate pro-

tective equipment and tools for safety.

Failure to do so could cause injury.

■ Install the unit securely in a place which can

bear the weight of the unit.

If the installation location cannot bear the weight of

the unit, the unit could fall causing injury.

■ Electrical work should be performed by a

qualied, experienced electrician, according

to the installation manual. Be sure to use an

exclusive circuit. Do not connect other electri-

cal appliances to the circuit.

 Ifthecapacityofthepowercircuitisinsufcientor

there is incomplete electrical work, it could result in

areoranelectricshock.

■ Ground the unit correctly.

Do not connect the ground to a gas pipe, water pipe,

lightning rod or telephone ground. Defective ground-

ing could cause electric shock.

■ Do not damage the wires by applying exces-

sive pressure with parts or screws.

 Damagedwirescouldcausereorelectricshock.

■ Be sure to cut off the main power in case of

setting up the indoor P.C. board or wiring

works.

Failure to do so could cause electric shock.

■ Use the specied wires to connect the indoor

and outdoor units securely and attach the

wires rmly to the terminal block connecting

sections so the stress of the wires is not ap-

plied to the sections. Do not extend the wires,

or use intermediate connection.

 Incompleteconnectingandsecuringcouldcausere.

■ Do not install the unit in a place where inam-

mable gas may leak.

If gas leaks and accumulates in the area around the

unit, it could cause an explosion.

■ Do not use intermediate connection of the

power cord or the extension cord and do not

connect many devices to one AC outlet.

 Itcouldcauseareoranelectricshockduetode-

fective contact, defective insulation, exceeding the

permissible current, etc.

■ Be sure to use the parts provided or specied

parts for the installation work.

The use of defective parts could cause an injury or

leakageofwaterduetoare,anelectricshock,the

unit falling, etc.

■ When plugging the power supply plug into the

outlet, make sure that there is no dust, clog-

ging, or loose parts in both the outlet and the

plug. Make sure that the power supply plug is

pushed completely into the outlet.

If there is dust, clogging, or loose parts on the power

supply plug or the outlet, it could cause electric shock

orre.Ifloosepartsarefoundonthepowersupply

plug, replace it.

■ Attach the electrical cover to the indoor unit

and the service panel to the outdoor unit se-

curely.

If the electrical cover of the indoor unit and/or the

service panel of the outdoor unit are not attached

securely,itcouldresultinareoranelectricshock

due to dust, water, etc.

■ When installing, relocating, or servicing the

unit, make sure that no substance other than

the specied refrigerant (R410A) enters the

refrigerant circuit.

Any presence of foreign substance such as air can

cause abnormal pressure rise and may result in ex-

plosion or injury. The use of any refrigerant other than

thatspecied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 alter the unit.

 Itmaycausere,electricshock,injuryorwaterleak-

age.

■ Do not discharge the refrigerant into the at-

mosphere. 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re,harmfulgas

could be generated.

If refrigerant gas leaks indoors, and comes into

contactwiththeame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 more than R22.

Not using appropriate tools or materials and incom-

plete installation could cause the pipes to burst or

injury.

■ When the refrigeration circuit has a leak, do

not execute pump down with the compressor.

When pumping down the refrigerant, stop the

compressor before disconnecting the refriger

ant 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 refrigera-

tion cycle could become abnormally high. This could

cause the pipes to burst or injury.

■ When installing the unit, securely connect the

refrigerant pipes before starting the compres-

sor.

If the compressor is started before the refrigerant

pipes are connected and when the stop valve is

open, air could be drawn in and the pressure in the

refrigeration cycle could become abnormally high.

This could cause the pipes to burst or injury.

■ Fasten a are nut with a torque wrench as

specied in this manual.

 Iffastenedtoo tight, a arenutmay break aftera

long period and cause refrigerant leakage.

■ The unit shall be installed in accordance with

national wiring regulations.

■ Do not use means to accelerate the defrosting

process or to clean, other than those recom-

mended by the manufacturer.

■ The appliance shall be stored in a room without

continuously operating ignition sources (for

example: open ames, an operating gas appli-

ance 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.

■ Keep any required ventilation openings clear of

obstruction.

■ Keep gas-burning appliances, electric heaters,

and other re sources (ignition sources) away

from the location where installation, repair, and

other air conditioner work will be performed.

WARNING

(Could lead to death, serious injury, etc.)

ENGLISH

This installation manual describes only for the indoor

unit. Refer to the MXZ type manual for outdoor unit

set up.

CONTENTS

1. BEFORE INSTALLATION .................................. 1

2. INDOOR UNIT INSTALLATION ......................... 4

3. FLARING WORK AND PIPE

CONNECTION .................................................. 8

4. TEST RUN....................................................... 10

5. GRILLE (OPTION) INSTALLATION ................ 10

6. PUMPING DOWN ........................................... 11

7. CONNECTING AN INTERFACE (OPTION) TO

THE AIR CONDITIONER ................................ 11

Phillips screwdriver

Level

Scale

Utility knife or scissors

2-15/16 in. (75 mm) hole saw

Torque wrench

Wrench (or spanner)

Flare tool for R410A

Gauge manifold for R410A

Vacuum pump for R410A

Charge hose for R410A

Pipe cutter with reamer

Water bottle

0.9 to 1.0 L water

1. BEFORE INSTALLATION

CAUTION

(Could lead to serious injury in particular environments 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 ac-

cording 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 ns

of the outdoor unit.

This could cause injury.

■ Do not install the outdoor unit where small

animals may live.

If small animals enter the unit and damage its electri-

cal parts, it could cause a malfunction, smoke emis-

sion,orre.Keeptheareaaroundtheunitclean.

BH79A643H01_01En.indd 1 2021/05/06 17:37:19

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User Manual - Page 2