Mitsubishi Electric SUZ-KA09, SUZ-KA12, SUZ-KA15, SUZ-KA18NA, SUZ-KA09NA Installation Manual

...

POUR L’INSTALLATEUR

PARA EL INSTALADOR

FOR INSTALLER

Air-Conditioners SUZ-KA09, KA12, KA15, KA18NA

INSTALLATION MANUAL

For safe and correct use, read this manual and the indoor unit installation manual thoroughly before installing the air-conditioner unit.

MANUEL D’INSTALLATION

Avant d’installer le climatiseur, lire attentivement ce manuel, ainsi que le manuel d’installation de l’appareil intérieur pour une utilisation sûre et correcte.

MANUAL DE INSTALACIÓN

Para un uso correcto y seguro, lea detalladamente este manual y el manual de instalación de la unidad interior antes de instalar la unidad de aire acondicionado.

Français

Español

English

Contents

1. The following should always be observed for safety . . . . . . . . . . . . . . . . . . . . 2

2. Selecting the installation location

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3. Installation diagram

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

4. Refrigerant piping work

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

5. Electrical work

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6. Maintenance

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1. The following should always be observed for safety

Caution:

Could lead to serious injury when operated incorrectly.

• After reading this manual, be sure to keep it together with the instruction manual in a handy place on the customer’s site.

: Indicates a part which must be grounded.

Warning:

Carefully read the labels afxed to the main unit.

Warning:

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

Improper or incomplete installation could cause re, electric shock, injury due to the unit falling, or water leakage. Consult a qualied installer or the dealer from

whom you purchased the unit.

■ Follow the instructions detailed in the installation manual.

Incomplete installation could cause re or electric shock, injury due to the unit

falling, or leakage of water.

■ 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.

■ 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 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 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 re.

■ 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 specied wires to securely connect the indoor and outdoor units.

Attach the wires rmly to avoid applying stress to the terminal block.

Improper connection could cause re.

■ Do not install the unit in a place where ammable 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 re or an electric shock.

■ 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.

■ 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 re or an electric shock.

■ When installing or relocating the unit, make sure that no substance other

than the specied refrigerant (R410A) enters the refrigerant circuit.

Any foreign substances in the refrigerant circuit can cause abnormal pressure rise or an explosion.

■ Do not discharge the refrigerant into the atmosphere. Check that the refrig-

erant 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 higher than R22. Not using the appropriate tools and materials, or improper installation could cause the pipes to burst caus-

ing an injury.

■ When pumping down the refrigerant, stop the compressor before discon-

necting 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 are nut with a torque wrench as specied in this manual.

If fastened too tight, a are nut could break and cause refrigerant leakage.

■ Install the unit according to national wiring regulations.

Caution:

■ 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.

• Please provide an exclusive circuit for the air conditioner and do not connect other electrical appliances to it.

• Be sure to read “The following should always be observed for safety” be

fore installing the air conditioner.

• Be sure to observe the cautions specied here as they include important

items related to safety.

• The indications and meanings are as follows.

Warning:

Could lead to death or serious injury.

■ 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 electrical parts, it could cause a

malfunction, smoke emission, or re. Keep the area around the unit clean.

3. Installation diagram

2.1. Outdoor unit

• Where it is not overly exposed to strong winds.

• Where airow is good and dustless.

• Where neighbors are not annoyed by operation sound or hot 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 ft. (3 m) away from the antenna of TV set or radio. Opera

tion of the air conditioner may interfere with radio or TV reception in areas where

reception is weak. An amplier 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 bafe boards.

Note:

• It is advisable to make a piping loop near outdoor unit so as to reduce vibration.

• For increased efciency, install the outdoor unit in a location where continuous

direct sunlight or excessive water can be avoided as much as possible.

Caution:

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 ex

posed directly to wind.

• To prevent exposure to wind, install the outdoor unit with its air inlet side facing

the wall and a bafe board on the air outlet side.

Avoid the following places for installation where air conditioner trouble is liable to occur.

• Where ammable gas could leak

• Where there is an excessive amount of machine oil in the air.

• Salty places such as the seaside.

• Where sulde gas is generated such as a hot spring.

• Where there is high-frequency or wireless equipment.

The outdoor unit produces condensate during the heating operation. Select the installation place to ensure to prevent the outdoor unit and/or the grounds from being wet by drain water or damaged by frozen drain water.

2. Selecting the installation location

Open 2 sides of left, right, or rear side.

in.

(100

mm)

in.

(350

mm)

in.

(200

mm)

Basically open 4 in. (100 mm) or more without any obstruction in front and on both sides of the unit.

4 in.

(100 mm)

or more

mm:tinUhcni:tinU

31-1/2

19-11/16

Air inlet

Air outlet

13-9/16

11-1/4

2-3/8×13/16 slot

12-12-3/4

1-9/16

800 500

Air inlet

Air outlet

2-10×21 slot

344.5

285

150

304-325

515/16

mm:tinUhcni:tinU

33-1/16

14-3/16

19-11/16

Air inlet

6-5/8

15-7/16

Air outlet

4-3/8 x 13/16 slot

1-9/16

840

169

500

Air

inlet

392

330

360

Air outlet

4-10 x 21 slot

20 in. (500 mm) or more

in.

(100

mm)

in.

(100

mm)

in.

(350

mm)

in.

(500

mm)

SUZ-KA09, KA12, KA15NA SUZ-KA18NA

When the piping is to be attached to a wall containing metals (tin plated) or metal netting, use a chemically treated wooden piece 25/32 in. (20 mm) or thicker between the wall and the piping or wrap 7 to 8 turns of insulation vinyl tape around the piping.

Units should be installed by licensed contractor accordingly to local code requirement.

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.

• To prevent exposure to wind, it is recommended to install a bafe board on the air outlet side of the outdoor unit.

Drain piping for outdoor unit

Install the unit horizontally. Do not use drain socket in cold regions. Drain may freeze and make the fan stop. The outdoor unit produces condensate during the heating operation. Select the installation place to ensure to prevent the outdoor unit and/or the grounds from being wet by drain water or damaged by frozen drain water.

4. Refrigerant piping work

4.1. Refrigerant pipe (Fig. 4-1, Fig. 4-2)

► Check that the difference between the heights of the indoor and outdoor

units, the length of refrigerant pipe, and the number of bends in the pipe are within the limits shown below.

Models

A Pipe length

(one way)

B Height

difference

C Number of

bends (one way)

SUZ-KA09, KA12,

KA15

Max. 65 ft (20 m) Max. 40 ft (12 m)

Max. 10

SUZ-KA18 Max. 100 ft (30 m) Max. 50 ft (15 m) Max. 10

• Height difference limitations are binding regardless of which unit, indoor or out

door, is positioned higher.

• Refrigerant adjustment ... If pipe length exceeds 25 ft. (7.5 m), additional refrig

erant (R410A) charge is required. (The outdoor unit is charged with refrigerant for pipe length up to 25 ft. (7.5 m).)

Pipe length

Up to 25 ft (7.5 m)

No additional charge is required.

Exceeding 25 ft (7.5 m)

Additional charge is required. (Refer to the table below.)

Refrigerant to be added

SUZ-KA09, KA12, KA15 1.62 oz each 5 ft. (30 g/m)

SUZ-KA18 1.08 oz each 5 ft. (20 g/m)

• Table below shows the specications of pipes commercially available.

Model Pipe

Outside

diameter

Min. wall

thickness

Insulation thickness

Insulation

material

inch (mm) inch (mm) inch (mm)

SUZ-KA09

For liquid 1/4 (6.35) 0.0315 (0.8) 5/16 (8)

Heat resisting

foam plastic

0.045 specic

gravity

For gas 3/8 (9.52) 0.0315 (0.8) 5/16 (8)

SUZ-KA12

For liquid 1/4 (6.35) 0.0315 (0.8) 5/16 (8)

For gas 3/8 (9.52) 0.0315 (0.8) 5/16 (8)

SUZ-KA15

For liquid 1/4 (6.35) 0.0315 (0.8) 5/16 (8)

For gas 1/2 (12.7) 0.0315 (0.8) 5/16 (8)

SUZ-KA18

For liquid 1/4 (6.35) 0.0315 (0.8) 5/16 (8)

For gas 1/2 (12.7) 0.0315 (0.8) 5/16 (8)

• To prevent condensation, insulate the 2 refrigerant pipes.

• Refrigerant pipe bending radius must be 4 in. (100 mm) or more

Caution:

Be sure to use the insulation of specied thickness (table on the above). Excessive

insulation may cause incorrect installation of the indoor unit, and too little insulation may cause condensate to form.

• The unit has ared 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.











ø1/4 (6.35) ø3/8 (9.52)

ø3/8 (9.52) ø1/2 (12.7)





Fig. 4-1

Fig. 4-2

D Indoor unit E Outdoor unit

A Indoor unit B Outdoor unit

4.2. Flaring work (Fig. 4-3)

1) Cut the cooper pipe as straight as possible with a pipe cutter.

2) Remove all burrs from the cut section of pipe, ensuring that precautions are taken to avoid getting metal shavings into the piping.

3) Remove are nuts attached to indoor and outdoor units, then put them on pipe.

4) Flaring work. Firmly hold copper pipe in the dimension shown in the table. Select A inch (mm) from the table according to the tool you use.

5) Check

• Compare the ared work.

•

If are is defective, cut off the section and repeat procedure.

Pipe diameter

inch (mm)

Nut

inch (mm)

A inch (mm) Tightening torque

Clutch

type tool

for R410A

Clutch

type tool

for R22

Wing nut

type tool

for R22

N·m

ft·lb

(kgf·cm)

1/4 (6.35) 1/4 (17)

0 to 0.02 (0 to 0.5)

0.04 to

0.06

(1.0 to 1.5)

0.06 to

0.08

(1.5 to 2.0)

13.7 to 17.7

10 to 13

(140 to 180)

3/8 (9.52) 3/8 (22)

34.3 to 41.2

25 to 30

(350 to 420)

1/2 (12.7) 1/2 (26)

0.08 to

0.10

(2.0 to 2.5)

49.0 to 56.4

36 to 42

(500 to 575)

5/8 (15.88) 5/8 (29)

73.5 to 78.4

54 to 58

(750 to 800)

Copper pipe

Good

90°

Tilted

No good

Burr

Copper pipe

Spare reamer

Pipe cutter

Smooth all around

Even length all around

Inside is shin

ing

without any

scratches.

Flare nut

Die

opper pipe

Clutch type

Flaring tool

Wing nut type

Uneven Burred

Fig. 4-3

Flare cutting dimensions

45˚± 2˚

90˚± 0.5˚









Flare nut tightening torque

R1/64 to R1/32

(inch)

A Liquid pipe B Gas pipe C Insulation D Taping

Fig. 4-5

4. Refrigerant piping work

4.3. Connecting pipes (Fig. 4-4, Fig. 4-5)

• Fasten are nut with a torque wrench as specied in the table (refer to 4.2.).

• When fastened too tight, are nut may eventually break and cause refrigerant

leakage.

[Fig. 4-5]

• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening are nut. A

• Use 2 wrenches to tighten piping connections.

• Use leak detector or soapy water to check for gas leaks after connections are completed.

• Apply refrigerant oil over the entire are seat surface.

• Use the are nuts for the following pipe size. D

KA09, KA12 KA15, KA18

Gas side Pipe size inch (mm) 3/8 (9.52) 1/2 (12.7)

Liquid side Pipe size inch (mm) 1/4 (6.35) 1/4 (6.35)

*1: The are nut is attached to its pipe. *2: The are nut is in the outdoor unit accessory. Do not use the are nuts other than the attachment. If it is used, a gas leakage

or even a pipe extraction may occur.

• Refrigerant pipe bending radius must be 4 in. (100 mm) or more.

• Make sure the pipes do not contact the compressor. Abnormal noise or vibration may result.

1 Pipes must be connected starting from the indoor unit.

Flare nuts must be tightened with a torque wrench.

2 Flare the liquid pipes and gas pipes and apply a thin layer of refrigerant oil

(Applied on site).

Warning:

Be careful of ying are nut. (Internally pressurized) Remove the are nuts as follows:

1. Loosen the nut until you hear a hissing noise.

2. Do not remove the nut until the gas has been completely released (i.e.,

hissing noise stops)

Check that the gas has been completely released, and then remove the nut.

A (Fig. 4-5)

Pipe diameter

Flare dimensions

øA dimensions

inch (mm) inch (mm)

1/4” (6.35) 11/32 - 23/64 (8.7 - 9.1) 3/8” (9.52) 1/2 - 33/64 (12.8 - 13.2) 1/2” (12.7) 41/64 - 21/32 (16.2 - 16.6) 5/8” (15.88) 49/64 - 25/32 (19.3 - 19.7)









Fig. 4-4

4.4. Purging procedures and leak test

1) Remove service port cap of stop valve on the side of the outdoor unit gas pipe.

2) Connect gauge manifold valve and vacuum pump to service port of stop valve on the gas pipe side of the outdoor unit.

3) Run the vacuum pump 15 minutes or more.

4) Check the vacuum with the gauge manifold valve, then close it and shut off the vacuum pump.

5) Leave as it is for one or two minutes. Make sure pointer gauge manifold valve

remains in the same position. Conrm that pressure gauge shows -0.101 MPa

[Gauge] (-30 in.Hg [-760 mmHg]).

6) Quickly remove gauge manifold valve from service port of stop valve.

7) After refrigerant pipes are connected and evacuated, fully open all stop valves on both sides of gas pipe and liquid pipe. Operating the unit without fully opening the valves lowers the performance and causes problems.

8) Refer to 4.1. Refrigerant pipe, and charge the prescribed amount of refrigerant if needed. Be sure to charge slowly with liquid refrigerant. Otherwise, composition of the refrigerant in the system may be changed and affect performance of the air conditioner.

9) Tighten cap of service port.

10) Conduct a leak test

Stop valve for GAS

Stop

valve cap

(Torque 19.6 to

29.4 N•m, 200

Vacuum pump (or the vacuum pump with the function to

Gauge manifold valve (for R410A)

Compound pressure gauge (for R410A)

–0.101 MPa (–30

in.Hg

[–760 mmHg])

Handle Low

Handle

High

Adapter for preventing

the back

Charge

hose

(for R410A)

*Close

*Open

Hexagonal

wrench

Precautions when using the control valve

When attaching the control valve to the service port, valve core may deform or loosen if excess pressure is applied. This may cause gas leak.

Service port

Charge hose

Body

Open

Control valve

When attaching the control valve to the service port, make sure that the valve core is in closed position, and then tighten part A. Do not tighten part A or turn the body when valve core is in open position.

Service port cap (Torque 13.7 to

17.7 N•m, 140 to 180 kgf•cm)

to 5 turns

Stop valve for LIQUID

Pressure gauge (for R410A)

5. Electrical work

5.1. Connecting wires for outdoor unit

1) Remove the service panel.

2) Remove the conduit cover.

3) Attach the conduit connector to conduit plate with lock nut then secure it against unit with screws.

4) Connect ground wires of indoor/outdoor unit connecting wire (A) and power sup

ply cord (K) to the TB support.

5) Loosen the terminal screw, and attach indoor/outdoor unit connecting wire (A) from the indoor unit correctly on the terminal block. Attach the wire to the terminal block securely so that its core cannot be seen, and no external force affects the connecting section of the terminal block.

6) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.

7) Connect power supply cord (K).

8) Install the conduit cover.

9) Install the service panel securely.

Lead wire

Power supply cord (K)

1-3/8 in. (35 mm)

19/32 in. (15

mm)

Terminal block

Conduit cover

Power supply cord (K)

Indoor/outdoor unit connecting wire (A)

• Make earth wire a little longer than others. (More than 2-3/8 in. [60 mm])

• For future servicing, leave some slack in the connecting wires.

Service panel

Lock nut

Conduit cover

Conduit plate

Connector

Grounding terminal

TB support

Terminal block

to conduit cover

Power supply cord (K) Indoor/outdoor unit

connecting wire (A)

Service panel

Lock nut

Conduit cover

Connector

TB support

Grounding terminal

INDOOR UNIT

Terminal block

208/230 V AC 1phase, 60 Hz

Grounding terminal**

Disconnect switch*

OUTDOOR UNIT

Grounding

terminal**

Ground

Power supply 208/230 V AC, 1phase 2wires. 60 Hz

Terminal

block 1

Remark:

* A disconnect switch is

required. Check the local code.

** Use a ring tongue termi

nal in order to connect a ground wire to terminal.

Terminal block 2

SUZ-KA09, KA12, KA15NA

SUZ-KA18NA

• Connect the cable from the indoor unit correctly on the terminal-block.

• Use the same terminal block and polarity as is used with the indoor unit.

• For aftercare maintenance, give extra length to connecting cable.

• Both ends of connecting cable (extension wire) are peeled off. When too long, or connected by cutting off the middle, peel off power supply cable to the size

given in the gure.

• Be careful not to contact connecting cable with piping.

Caution:

• Use care not to make miswiring.

• Firmly tighten the terminal screws to prevent them from loosening.

• After tightening, pull the wires lightly to conrm that they do not move.

Warning:

• Be sure to attach the service panel of the indoor unit securely. If it is not

attached correctly, it could result in a re or an electric shock due to dust,

water, etc.

• Tighten terminal screws securely.

• Wiring should be done so that the power lines are not subject to tension.

Otherwise, heat may be generated or re may occur.

+ 14 hidden pages

Mitsubishi Electric SUZ-KA09, SUZ-KA12, SUZ-KA15, SUZ-KA18NA, SUZ-KA09NA Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual